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STA333IS

STA333IS - 2-Ch 10W Digital Audio Amplifier | STMicroelectronics

The STMicroelectronics STA333IS is a 2-channel, fully integrated digital audio processor and power amplifier in a 30-pin CSP/WFBGA package, delivering up to 10 W per channel into a 4 ohm load from a single chip. It combines digital audio processing, digital amplifier control and an ST FFX power output stage into one die, so a complete all-digital Class-D speaker drive path needs only the STA333IS, a few passive networks and the speaker itself. A digital input amplifier IC such as the STA333IS belongs to the class-D / digital power amplifier family, which sits inside the broader hierarchy of audio ICs, audio signal processing and ultimately discrete semiconductor devices. Unlike a traditional analog Class-AB output stage, an FFX digital amplifier accepts a digital audio stream, performs gain, volume and tone control in the digital domain, and drives the load with a high-efficiency switched output stage. That shifts amplifier efficiency from the analog stage into the modulator, giving noticeably lower heat dissipation and higher usable output power from a small package. Key features of the device include 2-channel operation, an integrated FFX power output stage rated around 10 W per channel in Class-AB-equivalent behaviour for the version family, on-chip digital volume and tone control, short-circuit and thermal protection on the output stage, and a very small surface-mount footprint suitable for space-constrained portable and consumer audio products. Because the audio path is digital, the amplifier reproduces the source signal without the crossover distortion and thermal modulation associated with analog output stages, and no analog pre-amplifier is required ahead of it. Technically, the STA333IS integrates a digital audio processor that accepts S/PDIF or I2S-style digital streams, applies configurable gain and processing, and hands the result to the FFX modulator and output stage. The result is a compact, high-efficiency solution in which the DSP processing and the power stage share the same silicon, cutting the component count of a conventional digital-input, analog-output speaker design by several discrete parts and reducing board area in soundbars, wireless speakers and docking stations. Typical applications include Bluetooth and Wi-Fi speaker systems, soundbars, portable Bluetooth speakers, smart-home audio nodes, multi-room audio terminals and compact consumer audio products where a small amplifier footprint, efficient power delivery and digital volume control are required. One key design consideration is thermal management: the integrated output stage dissipates the majority of the power as heat in the package, so the exposed pad must be soldered to a properly sized copper area on a 2-layer or 4-layer board. A second consideration is the digital input interface: the STA333IS requires a digital audio source and a valid clock, so it cannot be driven from a legacy analog line input without an external ADC or codec. This page consolidates verified distributor and manufacturer information, package and pin data, drop-in alternatives in the same Sound Terminal family, and practical design notes that are not collected in a single place on the manufacturer product page.

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STA333ML13TR

STA333ML13TR - 2-Channel 20W DDX Audio Amplifier | STMicroelectronics

STMicroelectronics STA333ML13TR is a two-channel, microless Sound Terminal digital audio system with integrated high-efficiency Class-D amplification, 2 x 20 W output into 8 ohms at 18 V, and a PowerSSO-36 exposed-pad package. The device supports a 4.5 V to 20 V supply range and accepts digital audio through an I2S interface. A Sound Terminal is a highly integrated audio subsystem that combines input decoding, digital signal processing, volume control, and power-amplifier drive functions on one die. This integration places it between a digital audio interface, a power management system, and a loudspeaker or line-driver stage. Unlike a conventional analog audio amplifier, the STA333ML13TR can operate without an external microcontroller while preserving digital control over the signal path. Its principal features include two 24-bit DDX channels, 100 dB signal-to-noise ratio and dynamic range, selectable input sample rates from 32 kHz to 48 kHz, and automatic zero-detect mute. The DDX architecture provides high-efficiency digital power amplification while supporting two output configurations. Automatic mute reduces audible output during digital zero conditions, while the exposed pad improves heat transfer from the power-amplifier section. The STA333ML13TR integrates decoding, filtering, volume control, and amplification within one device, reducing the component count required for a digital speaker system. Its I2S-oriented architecture is suited to source devices that can provide 24-bit digital audio, including portable media equipment, audio docking systems, consumer electronics, and compact powered speakers. The 18 V operating condition cited for 2 x 20 W output into 8 ohms establishes the supply level required for the highest stated output configuration. Power-SSO-36 construction requires attention to both electrical and thermal design. The exposed thermal pad must be connected to the ground plane according to the manufacturer's package guidance, and adequate copper area must be provided to remove heat from the amplification stage. Input, output, supply, and decoupling connections should be routed to minimize switching noise and avoid unintended interaction between the two amplified channels. This page combines the manufacturer product information, distributor listings, package details, and application-specific engineering guidance. It highlights the distinction between the integrated STA333ML family and conventional discrete amplifier chains, helping engineers assess power-supply capability, interface compatibility, thermal implementation, and functional replacement options before committing a PCB layout. The most important design trade-off is integration versus flexibility. The STA333ML13TR reduces external circuitry and supports autonomous digital audio operation, but its fixed integrated architecture may be less suitable than a discrete amplifier chain when designers require independent analog gain stages, unusual output filtering, or custom thermal and power configurations. Verify the complete pin description, recommended PCB layout, output-filter requirements, and electrical limits in the manufacturer datasheet before layout release.

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STA333MLJ13TR

STA333MLJ13TR - 2-Channel 20W Class-D Audio | STMicroelectronics

STMicroelectronics STA333MLJ13TR is a fully integrated, two-channel Class-D audio amplifier processor rated for 4.5 V to 20 V operating supply and 20 W per channel. The device is packaged in a 36-pin PowerSSO surface-mount package with an exposed pad and supplied in tape-and-reel packaging. Its operating temperature range is 0°C to 70°C, and the manufacturer lists the component as active. A Class-D audio power amplifier is a semiconductor that uses transistor switching to deliver energy to a loudspeaker with high efficiency and low output-stage dissipation. Within the broader product hierarchy, the STA333MLJ13TR is a fully integrated audio amplifier processor, which combines Class-D output-driver functionality with audio signal-processing and interface capabilities. This integration can simplify a stereo amplifier design while reducing the number of external power-stage components. The two-channel architecture supports simultaneous left- and right-channel amplification, making the device suitable for stereo audio products. Its 4.5 V to 20 V supply range accommodates portable, consumer, multimedia, and automotive-style audio systems operating from suitable battery or regulated rails. The listed 20 W per-channel rating is a key selection criterion, but designers should confirm headroom, thermal limits, speaker impedance, and the manufacturer’s recommended output-filter topology for the intended enclosure and thermal environment. The PowerSSO-36 package provides a compact surface-mount footprint and an exposed thermal pad for distributing heat into the PCB copper area. Thermal performance depends on the PCB land pattern, copper coverage, airflow, ambient temperature, output power, and load impedance. Input filtering, feedback or mode-control components, supply decoupling, output inductors, and output capacitors should be implemented exactly as directed by the manufacturer datasheet to preserve the intended amplification behavior and reliability. Typical uses include compact stereo audio amplifiers, multimedia speakers, active speakers, home-audio systems, and powered speaker modules. The 36-pin PowerSSO arrangement is appropriate where a multi-channel Class-D solution must be mounted on a high-density PCB rather than through-hole hardware. Its integrated processing architecture can also reduce board area when compared with a discrete approach that requires separate output stages. Before layout, confirm that the exposed pad is tied to the required ground and thermal plane, input and output connections are separated to minimize feedback into sensitive audio paths, and the supply network provides adequate transient current. The choice should be based on the required channel count, continuous and peak output power, supply voltage, speaker impedance, thermal environment, and acoustic target. This product page combines the confirmed electrical and packaging facts with pin-compatible sourcing guidance, practical thermal and layout guidance, and decision criteria for comparing replacement options.

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STA333SML

STA333SML - 2-Channel Digital FFX Power Amplifier | STMicroelectronics

The STMicroelectronics STA333SML is a two-channel, fully integrated digital audio processor with digital amplifier control and an FFX power output stage. The device combines digital audio processing and amplification in one 30-ball, 3.24 mm × 2.57 mm CSP package, creating a high-power, high-efficiency solution for all-digital amplification. The verified source data identifies it as an audio IC with two channels and an integrated FFX output stage. A digital Class-D audio amplifier is a power-management IC that accepts digital audio information and uses an internal digital signal-processing path, control logic, and switching output stage to reproduce analog sound at a speaker load. Unlike a conventional analog audio amplifier, an all-digital implementation performs audio processing and power-stage control within the same device. The STA333SML belongs to this integrated digital amplification category and is intended to reduce the external signal-chain and amplifier-control complexity of multi-channel audio systems. The principal feature of the STA333SML is its integration of digital audio processing, digital amplifier control, and an FFX power output stage. This combination supports a high-power single-chip approach while retaining digital control over the amplification process. Its two-channel architecture allows it to drive left and right audio channels through a shared package. The verified distributor description explicitly classifies the part as an Audio Fully Integrated Processor with two channels, while the manufacturer describes high quality and high efficiency for all-digital amplification. The STA333SML is supplied in a compact 30-ball CSP measuring 3.24 mm × 2.57 mm. This package supports surface-mount assembly but creates a demanding PCB-layout task because the ball pitch and exposed power connections require careful land-pattern, thermal, and return-path design. Exact electrical ratings such as supply voltage, output power, modulation scheme, switching frequency, thermal resistance, and supported digital-audio interfaces are not stated in the supplied verified snippets and therefore must be confirmed in the manufacturer datasheet before design release. Typical application opportunities include compact stereo audio systems, soundbars, home-theater amplification, multimedia speakers, and other two-channel products that benefit from digital audio processing and a consolidated power-amplifier solution. In each case, the designer must verify the required digital-audio interface, sample rate, channel format, output-power target, load impedance, supply range, and thermal limits. A digital input implementation can also reduce analog routing between source devices and the output stage, provided the upstream source supports the interface expected by the device. The primary design consideration is PCB implementation. Because the verified package is a 30-ball CSP in only 3.24 mm × 2.57 mm, adequate soldering-profile control, ball-pad alignment, short power-current paths, and thermal via placement are essential. The power-supply network should be designed for the final output-power and channel-load combination, while input and return connections should minimize digital and power-path coupling. Exact component values and layout dimensions must follow the complete STMicroelectronics datasheet and reference design. This page consolidates the verified manufacturer description, distributor classification, package information, source links, and engineering checks for the STA333SML. It also distinguishes documented facts from parameters that still require confirmation. Because the supplied cross-reference search identifies no verified pin-compatible replacement, the alternatives section does not pad the result with electrically similar or differently packaged amplifier ICs that could not be guaranteed as drop-in devices.

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STA333W13TR

STA333W13TR - 2-Channel 20V DDX Audio Amplifier | STMicroelectronics

STMicroelectronics STA333W13TR is a two-channel high-efficiency digital audio system Sound Terminal with integrated digital audio processing, digital amplifier control, and a DDX power output stage. It supports 24-bit input, 100 dB SNR and dynamic range, selectable sampling rates from 32 kHz to 192 kHz, and a supply range extending to 20 V. The device is supplied in a 36-terminal PowerSSO-36 EPD surface-mount package. A digital audio system combines digital signal processing, digital-to-analog conversion, and power-amplifier control into one integrated circuit. The STA333W13TR accepts digital audio data, performs the required signal conditioning and modulation, and drives stereo speakers through its integrated Class-D-style DDX output stage. This integration reduces the number of separate audio-processing and amplification blocks required in compact consumer equipment. Two power-output configurations are available, supporting two channels of binary PWM in stereo mode or two channels of ternary PWM. Binary PWM provides a conventional two-level drive, while ternary PWM can reduce switching-related distortion and improve efficiency in suitable amplifier architectures. The 24-bit processing path and 100 dB SNR provide ample headroom for high-fidelity consumer audio systems. The 32 kHz to 192 kHz input-rate range supports standard digital-audio sources through high-resolution playback systems. The integrated architecture avoids the signal-path mismatch and additional conversion stages that can arise when a digital audio processor and a separate power amplifier are combined. The STA333W13TR is particularly relevant where stereo playback, digital input, compact PCB area, and energy-efficient amplification are priorities. Typical uses include compact stereo speakers, home-audio systems, sound bars, portable entertainment equipment, and consumer audio products with digital signal sources. Its PowerSSO-36 EPD package requires careful PCB layout and adequate thermal design because the integrated output stage dissipates power during operation. The supply rails and output-filter requirements should be implemented according to the manufacturer’s reference circuit. For robust deployment, use short, wide power-loop paths, place input and output capacitors close to their intended terminals, and verify thermal performance at the maximum expected channel output power. Keep sensitive digital and analog routing away from high-current switching nodes. This page summarizes the core architecture, operating ranges, package information, application guidance, and replacement considerations for faster engineering evaluation.

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STA335MLJ13TR

STA335MLJ13TR - 2-Channel Stereo Class D Audio Amplifier | STMicroelectronics

The STMicroelectronics STA335MLJ13TR is a 2-channel (stereo) Class D audio amplifier IC with integrated Sound Terminal signal processing, delivered in a 36-lead PowerSSO-36 EPD surface-mount package. It is a two-channel amplifier IC, with the surface-mount gull-wing lead geometry and 36 terminals specified for the PowerSSO-36 EPD outline. An audio amplifier IC is a discrete-semiconductor-free integrated block that reproduces an analog or digital audio signal at a usable output level. Class D refers to the output stage topology: the signal is switched between the supply rails and filtered into a linear output, which is why class D audio amplifiers achieve high conversion efficiency and low heat dissipation compared with class A or class B stages. When such a device also embeds digital audio conditioning, it belongs to the family of digital audio amplifiers or Sound Terminal devices, where decoding, volume control, bass management and power-stage drive are consolidated on one die. Key characteristics of this device include its two-channel stereo configuration, its integrated digital audio conditioning and interface capability, and its class D output stage. Because the digital processing is integrated, the host processor no longer has to perform bit-stream decoding or channel routing in software, which reduces both firmware load and system-level EMI risk. The package choice, PowerSSO-36 EPD, is a thermally enhanced surface-mount outline with an exposed thermal pad area that conducts heat away from the die into the PCB copper. Architecturally, the part combines a digital audio input path, embedded Sound Terminal processing, and two class D power output stages in a single monolithic device. This integration is the main technical differentiator versus discrete amplifier approaches: fewer external components mean a smaller bill of materials, a smaller PCB footprint, and fewer assembly joints to inspect. The trade-off is that the device is application-specific in its digital interface, so the host source and hardware design must match the ST reference configuration rather than being freely retargeted to any codec. Typical applications are compact stereo audio products such as sound bars, smart speakers, Bluetooth speaker systems, compact TV or monitor audio, and portable or panel-mount stereo products where a digital audio source is already available in the system. Design consideration: use the ST reference layout and the pin-description table in the manufacturer datasheet when assigning PCB tracks, and treat the exposed pad as a thermal and electrical connection, not just a heat spreader. This page consolidates the manufacturer part identity, distributor availability, drop-in alternatives, package details and practical design notes into a single engineering reference that goes beyond the raw catalogue entry.

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STA339BWS13TR

STA339BWS13TR - 2.1-Ch 40W FFX Audio Processor | STMicroelectronics

The STMicroelectronics STA339BWS13TR is a 2.1-channel, 40 W high-efficiency digital audio system processor with three FFX processing channels, 96 kHz internal processing, and 100 dB SNR. It combines digital audio processing, digital amplifier control, and a power output stage in a surface-mount 36-BFSOP PowerSSO package with an exposed pad. The device also supports a 576 × fS video input mode. A fully integrated digital power amplifier is a semiconductor system that accepts digital audio data, performs gain, volume, tone, and mixing functions, and drives loudspeaker outputs through an internal switching power stage. The STA339BWS belongs to the digital audio amplifier hierarchy, where it bridges digital signal processing and power management. Its FFX architecture is designed to improve efficiency while preserving high-fidelity audio performance in compact audio products. Three FFX processing channels support flexible 2.1-channel system configurations. The primary output architecture can use ternary PWM operation, while the device supports three distinct power output configurations for integration into different speaker arrangements. Its 100 dB signal-to-noise ratio provides a useful indication of low-noise signal reproduction, and 96 kHz internal processing offers a higher processing rate than the 48 kHz commonly used in basic CD-rate systems. The STA339BWS integrates digital audio processing, amplifier control, and output-stage driving in one package. This consolidation can reduce the number of separate digital-input and power-amplifier functions required in a multi-channel speaker. According to the STMicroelectronics product description, it is intended for high-power single-chip FFX digital amplification and includes thermal-overload and short-circuit protection technologies. These protections are important because speaker loads can present a sustained real-world load to the switching output stage. Typical applications include digital active loudspeakers, 2.1-channel home-theater speaker systems, compact multimedia speakers, soundbars, automotive audio systems, and other powered-audio products requiring multiple amplified outputs. The STA339BWS13TR is especially relevant where a high processing rate, efficient power conversion, and integrated digital control must coexist within a constrained PCB area. Designers should preserve the exposed-pad thermal path and follow the manufacturer’s recommended input, output, and power-stage layout. The exposed pad requires an uninterrupted ground connection and adequate copper area for heat removal. Speaker wiring, filter components, and power-supply routing also need to follow the reference layout to avoid excessive EMI, thermal stress, or unintended output-stage transients. This product comparison evaluates the STA339BWS13TR against pin-compatible family alternatives, emphasizing differences in channel topology, processing, protection, and board reuse. It also identifies practical thermal and layout constraints that are essential when turning the device into a reliable, reproducible digital audio amplifier design.

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STA339BWTR

STA339BWTR - 2.1-Channel Digital Audio System | STMicroelectronics

The STMicroelectronics STA339BWTR is a 2.1-channel high-efficiency digital audio system with integrated digital audio processing, digital amplifier control, and an FFX power output stage. It supports a 26 V operating supply range, has a 30 V absolute maximum supply rating, and is supplied in a 36-FSOP surface-mount package with an exposed pad. The device provides multiple power-output configurations, including two channels of ternary PWM in stereo mode and operation as three channels in a 2.1-channel system. A digital audio system is an integrated audio signal-chain IC that processes digital audio, controls amplification, and delivers power through an efficient output stage. Within the broader hierarchy, the STA339BWTR belongs to the digital amplifier class, which combines a digital signal processor, power-control logic, and speaker-drive circuitry in one package. Its FFX architecture is designed to provide high-quality, high-efficiency, all-digital amplification for compact audio products. Key features include a wide 26 V operating supply range, a 30 V absolute maximum rating, integrated digital audio processing, digital amplifier control, and an FFX power output stage. The FFX implementation supports ternary PWM output configurations for stereo or 2.1-channel operation. The manufacturer describes the STA339BW as a high-power single-chip solution intended to reduce the number of discrete components required in powered speaker systems. The device accepts digital audio information and uses its integrated processing and control functions to manage the amplifier channels. According to the manufacturer datasheet, specifications are evaluated under defined conditions including VCC = 18 V, 1 kHz signal frequency, 384 kHz switching frequency, 25°C ambient temperature, and an 8 ohm load unless otherwise specified. These conditions provide the reference point for interpreting the electrical and performance data. Typical applications include active speaker systems, compact consumer-audio products, sound bars, smart speakers, multimedia equipment, and other 2.1-channel installations where an integrated digital amplifier simplifies the signal path. The exposed-pad package also requires careful PCB layout for heat transfer from the power stage to the board copper. Designers should follow the manufacturer datasheet for decoupling, output filtering, thermal management, exposed-pad soldering, and loudspeaker-load requirements. In particular, the power-output configuration must be selected for the intended channel count and speaker impedance, and the PCB must provide adequate thermal copper around the exposed pad. Verify maximum supply voltage, current, and thermal limits against the selected operating mode. This page consolidates the verified manufacturer and distributor information, practical package and thermal guidance, pricing references, and a structured comparison of the available drop-in candidates. It is intended to help engineers confirm footprint, supply, power-output, and sourcing requirements before committing to a board design.

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STA350BTR

STA350BTR - 2-Channel 50W Digital Audio System | STMicroelectronics

The STMicroelectronics STA350BTR is a fully integrated, 2-channel digital audio system processor with a high-efficiency FFX-power output stage, delivering 50 W per channel into 6 ohms from a 5 V to 26 V supply in a PowerSSO-36 surface-mount package. It combines digital audio processing, digital amplifier control, and power-stage functionality for compact 2.1-channel audio designs. A fully integrated digital audio system is a mixed-signal semiconductor category that combines an audio signal-processing path, digital control, and an efficient power-amplifier output stage. Within the broader hierarchy of audio ICs, interface ICs, and power-management devices, the STA350BTR is designed to reduce the component count and board area required by conventional digital Class-D audio solutions while maintaining digital control of the amplification stage. The primary verified ratings are 50 W per channel at 6 ohms, a 2-channel configuration, and a 5 V minimum supply voltage. The device supports supply voltages up to 26 V, operates from -20°C to +85°C, and is supplied in a 36-terminal PowerSSO surface-mount package. Its integrated architecture is intended for applications where high-efficiency digital amplification and controlled sound output are required in the same package. The STA350B family integrates digital audio processing, digital amplifier control, and an FFX-power output stage. This combination allows the controller and power-amplifier functions to reside on one device rather than requiring separate digital audio and analog-output blocks. That architectural consolidation can simplify board partitioning and provide a compact implementation for digital audio systems, although the complete pin assignments and detailed electrical characteristics are not present in the supplied source excerpts. Typical uses include 2.1-channel sound terminals, powered speakers, compact home-audio systems, multimedia equipment, and other audio products requiring two amplified outputs. The 50 W per channel rating at 6 ohms makes the device relevant to consumer-audio products that need more power than a conventional integrated headphone amplifier can provide, while the 26 V maximum supply permits use in higher-voltage amplifier architectures when all electrical and thermal limits are observed. A critical design consideration is heat management. The PowerSSO-36 package must dissipate the losses associated with high-power Class-D amplification, so exposed-pad layout, copper area, thermal vias, enclosure airflow, and clean speaker-filter selection can materially affect reliability. Designers should also confirm the complete pinout, acoustic tuning, digital interface configuration, and protection requirements against the manufacturer datasheet before layout release. This page consolidates distributor availability, verified electrical limits, pricing information, replacement guidance, and practical engineering considerations. It distinguishes confirmed specifications from unavailable data and avoids presenting unverified pin assignments or unsupported cross-brand equivalents as drop-in replacements, helping engineers evaluate the STA350BTR with fewer sourcing and design risks.

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STA350BWTR

STA350BWTR - 36W 2.1-Channel Audio System | STMicroelectronics

STMicroelectronics STA350BWTR is a 2.1-channel, high-efficiency digital audio system integrating digital audio processing, digital amplifier control, and an FFX-power output stage. It supports mono or stereo operation and is identified as a 36 W Class-AB audio solution in a 36-pin PowerSSO package with an exposed pad. The device is supplied in tape-and-reel packaging under the STA350BWTR ordering code. An integrated digital audio system combines several functions that are otherwise implemented as separate signal-chain blocks. These functions include digital audio processing, digital amplifier control, and the power-output stage. The STA350Bx family therefore belongs to the amplifier-IC and power-management-IC hierarchy while specifically serving powered-speaker and consumer-audio applications. The STA350BWTR is presented as a 2.1-channel solution with two-channel capability. Verified specifications are defined at a supply voltage of 24 V, a test frequency of 1 kHz, a switching frequency of 384 kHz, an ambient temperature of 25 °C, and an 8 Ω load unless otherwise specified. The listed 36 W output capability and high-efficiency architecture suit compact powered-speaker systems where useful acoustic output must be obtained from a limited power budget. The integrated digital processing and amplifier-control functions reduce the amount of external circuitry required compared with a discrete approach. The 384 kHz switching frequency identifies the device as a digitally controlled audio power system rather than a conventional analog-output amplifier. The 2.1-channel format supports common stereo-speaker arrangements augmented by a subwoofer, while the integrated FFX-power output stage provides the final power-conversion function. Typical uses include powered stereo speakers, multimedia speaker systems, compact home-audio products, sound bars, and other consumer systems requiring efficient digital audio amplification. The exposed-pad PowerSSO-36 package is particularly relevant to designs where heat removal from the power stage is a central PCB-layout concern. Designers should follow the manufacturer datasheet for the exact pin assignments, exposed-pad connection, input configuration, control interface, filtering requirements, and recommended external components. Thermal performance depends strongly on PCB copper area, the exposed-pad layout, enclosure heat dissipation, output level, load impedance, and the 24 V operating condition used for the stated specifications. This page consolidates the verified manufacturer and distributor information for STA350BWTR, including the published test conditions, package identification, price reference, product positioning, and practical selection considerations. It also distinguishes documented facts from parameters that still require confirmation from the complete manufacturer datasheet or an authorized source.

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STA369BWSTR

STA369BWSTR - 40W 2.1-Ch Digital Audio Amplifier | STMicroelectronics

STMicroelectronics STA369BWSTR is a fully integrated digital audio amplifier processor for 2.1-channel systems, delivering up to 40 W in a 36-pin PowerSSO exposed-pad package. It combines digital audio processing, digital amplifier control, and an FFX power-output stage within one device. Its operating supply range is 4.5 V to 21.5 V. A digital audio amplifier, also called a class-D amplifier, converts digital audio signals directly into high-efficiency speaker drive. The STA369BW belongs to the Sound Terminal family of integrated digital audio processors and uses STMicroelectronics FFX, or fully flexible amplification, technology. This integration reduces the number of discrete signal-chain and output-stage components required in a compact multimedia or home-audio system. The principal system characteristics include 2.1-channel operation, a 40 W output capability, digital audio processing, digital amplifier control, and an integrated FFX power stage. The 21.5 V maximum supply listed for the device accommodates higher-voltage power-amplifier operating environments, while the 4.5 V minimum supply supports lower-voltage system rails. Users must still verify load, thermal, and supply limits against the manufacturer application guidance for the selected channel configuration. Architecturally, the device places signal processing, amplifier control, and power conversion into a single package. This integrated approach can shorten the audio path and simplify board design compared with a discrete codec, DSP, modulator, and output-stage architecture. Its exposed-pad package also provides a direct thermal path from the power stage to the PCB, making copper-plane layout and thermal management essential in higher-output designs. Typical uses include compact home-theater systems, active speakers, multimedia monitors, soundbars, and other 2.1-channel consumer-audio products. The device is particularly relevant where a high-power subwoofer channel and two additional speaker channels share a controlled digital audio system. Host-controller integration allows system audio settings and amplifier behavior to be managed electronically. For implementation, follow the manufacturer datasheet for the exposed-pad connection, power-supply decoupling, digital input routing, speaker configuration, and thermal layout. Allow adequate copper around the exposed pad and use the specified input and output filtering networks to preserve signal quality, limit EMI, and maintain stable amplification. This product overview organizes the key operating data, drop-in replacement candidates, application guidance, and PCB design cautions into one engineering reference. It also identifies where package-specific pin assignments and secondary electrical parameters must be confirmed in the manufacturer datasheet before release to production.

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STA369BWTR

STA369BWTR - 2.1-Channel Digital Audio Amplifier | STMicroelectronics

STMicroelectronics STA369BWTR is a 2.1-channel high-efficiency digital audio system Sound Terminal IC with digital audio processing, digital amplifier control, and an FFX power output stage integrated into one package. The device supports power supplies of 3.3 V and 22 V, operates from -20 °C to 85 °C, and is supplied in a 36-terminal PowerSSO-36 EPD surface-mount package. Its integrated digital architecture is intended to reduce the component count and simplify implementation in compact consumer audio systems. An audio digital amplifier IC is a power-management and signal-processing device that converts digital audio signals into efficient class-D-style power-stage outputs. The STA369BW belongs to the Sound Terminal family, which combines digital audio processing, amplifier control, and FFX fully flexible amplification technology. This integrated hierarchy places the device between a digital audio source and powered loudspeakers, allowing a complete 2.1-channel audio path to be implemented in a compact design. Key features include two-channel digital audio processing, high-efficiency digital amplification, I2C and I2S interfaces, and a 36-terminal PowerSSO-36 EPD package. The 22 V power supply supports higher-power loudspeaker output stages, while the 3.3 V supply supports the digital control and signal-processing domain. The reported operating temperature range is -20 °C to 85 °C, making the device suitable for consumer equipment where indoor ambient temperatures are typical. The FFX architecture allows the amplifier system to combine digital processing with a power output stage in a single-chip solution. Digital audio data is received through the I2S interface, while I2C provides the control path for configuration and operating parameters. This division of functions helps designers build a 2.1-channel amplifier without implementing separate DSP, control, and power-amplifier blocks on the main board. Typical applications include compact home-audio systems, active speakers, soundbars, multimedia speakers, and other 2.1-channel consumer audio products. The integrated digital control and amplification approach can reduce board area and simplify firmware management. The 36-terminal exposed-pad package still requires careful PCB layout, adequate thermal copper, and verified power-supply decoupling to preserve audio performance. The primary design consideration is ensuring that the 3.3 V and 22 V supply rails have appropriate voltage tolerance, noise performance, and decoupling. The exposed pad and power-output architecture should be evaluated against the required loudspeaker load and thermal environment before production release. Designers should use the manufacturer datasheet and reference layout for the exact STA369BW variant rather than treating generic audio-amplifier layouts as equivalent. This product data combines the manufacturer datasheet and product-page identity, distributor availability information, package details, and the supplied cross-reference evidence. It also distinguishes verified STA369BWTR information from specifications that were not present in the supplied source data, avoiding unsupported assumptions about electrical ratings or replacement compatibility.

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STA381BW

STA381BW - 2.1-Channel Digital Audio Amplifier | STMicroelectronics

STMicroelectronics STA381BW is a 2.1-channel high-efficiency digital audio system integrating digital audio processing, digital amplification, an FFX power output stage, headphone output, and 2 Vrms line outputs in a 48-pin VQFN package. It supports a wide 26 V operating supply range, with a 30 V absolute maximum rating, and is controlled through an I2C interface with a selectable device address. A digital audio amplifier is an audio IC that accepts a digital audio stream, performs signal processing and amplification, and drives speakers or line-level outputs with high efficiency. In the broader power-management and signal-processing hierarchy, the STA381BW combines a digital audio processor, Class-D-style digital power amplification, headphone circuitry, and integrated speaker-output functionality to reduce the component count of a 2.1-channel audio system. The STA381BW is designed to deliver up to 2 x 20 W into 8-ohm speakers at an 18 V supply in the 2.0-channel BTL configuration described by STMicroelectronics application note AN3959. This output capability makes it applicable to compact home-theater, multimedia, active-speaker, and digital active-speaker products. Its integrated headphone and 2 Vrms line outputs also allow the same device to support additional listening paths without a separate output amplifier for every function. The 2.1-channel architecture supports integration of a stereo or multichannel digital source, sound-field processing, and two amplified speaker channels. Digital processing and control through I2C allow host software to configure the device address and operating behavior. The integrated FFX power stage is intended to improve conversion efficiency and reduce power dissipation compared with a conventional linear output stage, particularly when the output voltage swing required by the speaker load is relatively low. The VQFN-48 package requires careful PCB layout because its exposed thermal area provides the principal heat-transfer path from the power stage. Input, output, supply, and ground connections must follow the manufacturer layout guidance, while decoupling should be placed close to the relevant pins. The application note identifies a 2.0-channel BTL demonstration board based on the STA381BW and STA381BWS, providing a useful reference for power routing, speaker connections, control interfacing, and thermal implementation. Design trade-offs include the 26 V operating limit, the 30 V absolute maximum rating, and the thermal requirements of a high-power multichannel amplifier. Designers should verify the maximum transient supply voltage, configure protection for exposed speaker outputs, and confirm that the PCB copper and thermal pad support the intended continuous output power. This page consolidates the verified product capabilities, application-note data, source links, and engineering considerations into a structured guide for evaluating the STA381BW in digital active-speaker designs.

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STA381BWTR

STA381BWTR - 2.1-Channel Digital Audio Amplifier | STMicroelectronics (Tape & Reel)

STMicroelectronics STA381BWTR is a 2.1-channel high-efficiency digital audio system integrating digital audio processing, digital amplification, an FFX power output stage, headphone output, and 2 Vrms line outputs in a 48-pin VQFN package. It supports a wide 26 V operating supply range, with a 30 V absolute maximum rating, and is controlled through an I2C interface with a selectable device address. A digital audio amplifier is an audio IC that accepts a digital audio stream, performs signal processing and amplification, and drives speakers or line-level outputs with high efficiency. In the broader power-management and signal-processing hierarchy, the STA381BWTR combines a digital audio processor, Class-D-style digital power amplification, headphone circuitry, and integrated speaker-output functionality to reduce the component count of a 2.1-channel audio system. The STA381BWTR is designed to deliver up to 2 x 20 W into 8-ohm speakers at an 18 V supply in the 2.0-channel BTL configuration described by STMicroelectronics application note AN3959. This output capability makes it applicable to compact home-theater, multimedia, active-speaker, and digital active-speaker products. Its integrated headphone and 2 Vrms line outputs also allow the same device to support additional listening paths without a separate output amplifier for every function. The 2.1-channel architecture supports integration of a stereo or multichannel digital source, sound-field processing, and two amplified speaker channels. Digital processing and control through I2C allow host software to configure the device address and operating behavior. The integrated FFX power stage is intended to improve conversion efficiency and reduce power dissipation compared with a conventional linear output stage, particularly when the output voltage swing required by the speaker load is relatively low. The VQFN-48 package requires careful PCB layout because its exposed thermal area provides the principal heat-transfer path from the power stage. Input, output, supply, and ground connections must follow the manufacturer layout guidance, while decoupling should be placed close to the relevant pins. The application note identifies a 2.0-channel BTL demonstration board based on the STA381BWTR and STA381BWTRS, providing a useful reference for power routing, speaker connections, control interfacing, and thermal implementation. Design trade-offs include the 26 V operating limit, the 30 V absolute maximum rating, and the thermal requirements of a high-power multichannel amplifier. Designers should verify the maximum transient supply voltage, configure protection for exposed speaker outputs, and confirm that the PCB copper and thermal pad support the intended continuous output power. This page consolidates the verified product capabilities, application-note data, source links, and engineering considerations into a structured guide for evaluating the STA381BWTR in digital active-speaker designs.

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STA50013TR

STA50013TR - 60W Stereo Class D Amplifier | STMicroelectronics

The STMicroelectronics STA50013TR is a quad half-bridge Class D audio power amplifier IC rated for 60 W per channel into 8 ohms, with a 10 V to 36 V supply range and a 36-pin PowerSO-36 surface-mount package. It can operate as a 2-channel stereo or 4-channel quad output-stage device, combining four complementary DMOS half bridges with CMOS-compatible logic inputs. A Class D amplifier is a switching power amplifier that uses pulse-width modulation to drive output transistors continuously. Compared with a linear audio amplifier, this architecture can provide high output power with lower conduction losses because the internal MOSFETs spend most of their time in low-resistance switching states. In this device, the quad half-bridge arrangement allows one package to support multiple speaker channels in audio systems, automotive equipment, and powered speaker designs. Key features include 60 W output power per channel into an 8-ohm load, operation from 10 V to 36 V, and complementary DMOS output stages with an on-resistance of 200 mOhm. The output stage includes thermal protection and thermal warning functions, while output overvoltage and undervoltage protection help prevent operation outside the intended output conditions. CMOS-compatible logic inputs simplify connection to a system controller or audio processor. The STA50013TR combines four configurable half bridges rather than integrating a conventional analog voltage amplifier and output stage in each channel. This makes it suitable for bridge-tied speaker loads, where each speaker is driven differentially. The 200 mOhm complementary DMOS output stage is the central switching element, while the BCDMOS process supports the combination of high-voltage handling, logic functions, and power output transistors in one integrated circuit. Typical uses include car-audio and automotive audio amplification, powered speakers, home-audio systems, portable installations, and industrial sound equipment. The quad configuration can also be arranged as four independent channels or combined into two stereo channels. Thermal design, speaker impedance, supply capability, and output filtering remain important because the amplifier dissipates substantial power during high-level operation and switching edges can generate high-frequency electromagnetic energy. For a new design, confirm the complete pin configuration in the manufacturer datasheet, follow the recommended input, supply, and output-filter networks, and place the exposed thermal area over an uninterrupted copper region. Because the device is listed as obsolete by one technical source while distributor inventory is also shown, verify current assembly life-cycle status before committing a new production design. A currently supported product should be selected for new production when possible. This page summarizes the principal electrical ratings, protection functions, package characteristics, and application considerations of the STA50013TR. It also documents the practical absence of a confirmed pin-to-pin drop-in substitute, helping engineers compare this part against newly proposed amplifier ICs without assuming that a similar wattage rating guarantees PCB compatibility.

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STA501013TR

STA501013TR - 40V 3.5A Class D Half-Bridge | STMicroelectronics

STMicroelectronics STA501013TR is a 40 V, 3.5 A mono Class D power half-bridge amplifier IC packaged in PowerSO-36. The device combines a complementary DMOS output stage, CMOS-compatible logic inputs, thermal protection, thermal warning, and under-voltage protection. It is designed for efficient audio-power conversion and supports a listed output capability of 50 W into 8 ohms. A Class D half-bridge amplifier is a switching power amplifier that uses pulse-width modulation to drive an output stage efficiently. A half-bridge contains two coordinated switching paths rather than the complete output network required for a full bridge. In motor, audio, and transducer applications, this topology provides high current drive with lower conduction loss than a linear output stage, although output filtering and careful layout remain important. Key device characteristics include a 40 V maximum rating, 3.5 A output-current capability, 200 mΩ MOSFET on-resistance, CMOS-compatible control inputs, and integrated thermal and under-voltage protection. The PowerSO-36 package provides 36 terminals and supports surface-mount assembly. The complementary DMOS architecture alternates current between the two switching devices, while the thermal warning output gives the host system an early indication that operating conditions are approaching the device’s thermal limit. The STA501013TR is identified as a one-channel mono Class D amplifier. Its switching output must be connected through an appropriate LC output-filter network when driving a loudspeaker or other inductive load. The filter suppresses the high-frequency switching energy inherent to Class D operation and should be selected using the actual switching frequency, load impedance, attenuation requirement, and permissible group delay for the target system. Typical uses include compact audio amplifiers, powered speakers, subwoofer amplification, motor and actuator drivers, and other load systems that need efficient high-current drive. Thermal design is especially important because Class D efficiency still does not eliminate all output-stage loss. The PCB copper area, exposed thermal interface, ambient temperature, switching frequency, output current, and load determine junction temperature, so a production design should reproduce the worst-case audio or motor duty cycle rather than rely on a no-load calculation. For PCB implementation, place the high-current output paths compactly and use wide copper conductors to minimize parasitic resistance and inductance. Keep the switching node small, connect the output filter close to the amplifier pins, and provide low-impedance supply decoupling. The manufacturer datasheet should be used to assign all 36 terminals and configure the IN, PWM or logic-control, bootstrap, ground, power, protection, and diagnostic connections exactly as specified for the selected topology. This page consolidates the verified electrical ratings, protection features, application guidance, sourcing workflow, and design considerations for engineers evaluating the STA501013TR. It also distinguishes documented device characteristics from parameters that require confirmation from the full manufacturer datasheet before schematic release or production qualification.

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STA501A

STA501A - 45V 4A Dual Power Half-Bridge | STMicroelectronics

The STMicroelectronics STA501A is a 45 V, 4 A double power half-bridge integrated circuit in the PowerSO-36 package. It is a monolithic dual half-bridge output stage built with Multipower BCD technology, intended for audio amplifier output stages, particularly high-efficiency digital amplifier systems. The verified distributor listing identifies the device as a 45 V, 4 A double power half-bridge, while the manufacturer-related datasheet listing describes a 45 V, 3.5 A double power half-bridge implementation. The STA501A belongs to the power-amplifier IC hierarchy: it is a dual half-bridge power stage, a class of audio power amplifier output driver, and ultimately a power-management IC with integrated complementary DMOS output devices. Its CMOS-compatible logic inputs simplify control from an all-digital audio amplifier controller. The output stage is designed to drive loudspeaker loads in mono or bridge-related configurations when paired with suitable modulation, filtering, and protection circuitry. Key features include Multipower BCD technology, complementary DMOS output stages, CMOS-compatible logic inputs, thermal protection, and thermal warning. The STA501A is suitable for audio systems requiring a high-voltage, high-current output stage, including Class-D and DDX-style amplifier platforms. Its PowerSO-36 package provides a surface-mount solution for power amplifier boards. The device requires careful attention to supply voltage, output current, thermal dissipation, gate-drive timing, and speaker-load limitations. Because the verified results do not provide complete electrical tables, pin assignments, exact output-power curves, or validated drop-in equivalents, those details should be confirmed against the official STMicroelectronics datasheet before design release. Typical uses include high-efficiency mono audio amplifiers, multi-channel audio power modules, digital amplifier output boards, and consumer or professional audio products. The STA501A is most appropriate when the system already provides the digital PWM controller and only requires a robust integrated power-output stage. This page consolidates the verified manufacturer and distributor descriptions, identifies the documented electrical envelope, and separates confirmed characteristics from parameters that still require datasheet verification. That distinction is important because package appearance alone does not establish drop-in compatibility.

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STA501A13TR

STA501A13TR - 4A 45V Audio Power Amp | STMicroelectronics

STMicroelectronics STA501A13TR is a 4 A, 45 V double power half-bridge audio amplifier IC designed for the output stage of a mono All-Digital High Efficiency amplifier. The device is housed in a PowerSO-36 package and can deliver 50 W into an 8 ohm load at 30 V supply with 10% total harmonic distortion. Its complementary DMOS output stage, MultiPower BCD technology, CMOS-compatible logic inputs, and thermal protection make it suitable for high-power audio systems. A power half-bridge is a switched audio output topology that uses two driver channels to develop voltage across a speaker load. The STA501A13TR belongs to the broader class of audio amplifier ICs, which combines power-semiconductor output stages with control logic in one integrated device. By replacing discrete driver and MOSFET stages with a MultiPower BCD circuit, it simplifies the design of high-efficiency mono Class-D amplifiers while preserving a compact system-level implementation. The principal specifications are a 45 V maximum supply identified by the product listing and a nominal output-current capability of 4 A. The manufacturer datasheet excerpt states that minimum input pulse-width distortion is 200 m and that the output uses a complementary DMOS stage. Additional listed protections include thermal protection, while the 50 W output capability at 30 V and 8 ohms defines the intended high-power audio operating point. The device is intended for a mono DDX amplifier output stage rather than a conventional small-signal signal amplifier. Its high supply-voltage rating and current capability suit professional-audio power stages, consumer home-theater amplification, and automotive sound systems. The CMOS-compatible logic interface also allows the output stage to be controlled by a digital audio modulator or other digital signal-processing circuitry without requiring high-voltage gate-drive signals. Because power half-bridge stages can dissipate substantial heat during real speaker operation, PCB layout and thermal management are as important as electrical performance. The PowerSO-36 package must be connected to an adequate thermal copper area, and the power loop should use very short, wide traces. Designers should also account for inductor resistance, switching losses, speaker impedance, and thermal protection behavior rather than relying only on the nominal 4 A output rating. This page combines the manufacturer-datasheet performance point with practical guidance for selecting and implementing the amplifier. It distinguishes the STA501A13TR from the identified STA501A13TR-1A related variant, outlines the limits of the verified drop-in candidate, and focuses on the design decisions that determine usable output power, distortion, heat dissipation, and PCB reliability in a high-power mono audio system.

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STA502A

STA502A - 60W Mono Class-D Amplifier | STMicroelectronics

The STMicroelectronics STA502A is a 60 W mono Class-D audio power amplifier with a 10 V to 36 V supply range, housed in an exposed-top PowerSO-36 package. It combines a one-channel audio output architecture with CMOS-compatible logic inputs, standby support, thermal protection, and a MultiPower BCD implementation featuring a complementary DMOS output stage. A Class-D audio amplifier is a switching power amplifier within the broader amplifier IC and audio signal-chain hierarchy. Unlike a linear audio amplifier, it drives the speaker through a switching output stage, enabling high output power with lower internal power dissipation than a comparable linear stage. The STA502A targets mono audio systems where efficient power delivery, compact packaging, and integrated protection are important design considerations. Key features include a maximum output-power rating of 60 W, a 10 V to 36 V supply-voltage range, standby operation, and thermal protection. The exposed top pad supports heat transfer into the PCB copper area. The published feature summary also identifies CMOS-compatible logic inputs, MultiPower BCD technology, and a complementary DMOS output stage with a stated minimum input-output pulse-width distortion of 200 m. Technically, the device integrates its class-D output circuitry into one package, reducing the number of external power transistors normally associated with a discrete amplifier design. The 36-pin PowerSO-36 exposed package concentrates the thermal and electrical interface in a surface-mount format. Designers must nevertheless provide adequate input, output, supply, and decoupling components exactly as required by the manufacturer application guidance. Typical uses include mono speaker systems, powered audio equipment, industrial audio products, embedded sound systems, and compact consumer audio equipment operating from a suitable DC supply. In these applications, the 60 W capability supports higher-power speaker drive, while the Class-D architecture reduces the heat generated within the amplifier compared with an equivalent linear output stage. The exact speaker compatibility remains dependent on supply voltage, load impedance, thermal conditions, and output-filtering requirements. A critical design consideration is thermal management. Because the package exposes its top pad, layout should provide a continuous thermal copper region, adequate via arrays, and a correctly sized thermal interface as specified by the manufacturer. Output filtering, speaker wiring, supply decoupling, and protection against inductive loads should also be implemented according to the datasheet rather than inferred from generic Class-D guidance. This page consolidates verified distributor listings, the available datasheet specifications, package information, sourcing links, and explicit data gaps into one engineering-focused reference. It distinguishes confirmed STA502A characteristics from parameters that still require datasheet or distributor confirmation, helping engineers evaluate suitability without filling missing electrical values with assumptions.

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STA50613TR

STA50613TR - 40V 4A Quad Class-D Half-Bridge | STMicroelectronics

STMicroelectronics STA50613TR is a 40 V, 4 A quad power half-bridge audio amplifier IC configured for mono or stereo Class-D speaker drive in a 36-lead PowerSO-36 package. Its four complementary DMOS output stages support an operating supply range of 10 V to 36 V and combine CMOS-compatible logic inputs with integrated protection for undervoltage, short circuit, thermal warning, and thermal shutdown conditions. An audio power amplifier converts low-level input signals into a current and voltage swing capable of driving loudspeakers efficiently. Class-D topology switches the output stage at high frequency, reducing conduction losses compared with linear amplifiers. The STA50613TR provides four half-bridge outputs, allowing mono differential operation from two channels or stereo operation across four outputs when configured by the host system. The quad half-bridge arrangement is useful in compact consumer-audio and automotive-style subsystems where multiple powered speakers, soundbars, or multimedia enclosures share one power-amplifier device. Logic-level control reduces the need for external driver transistors. The 200 mOhm output-stage figure and 40 V maximum supply support headroom for common battery and automotive-derived power rails, while the package exposes a large thermal slug for heat removal. Protection features are essential in speaker systems where wiring faults, stalled voice coils, or sustained full-scale output can overload the amplifier. Thermal warning and shutdown provide escalating thermal management, and short-circuit protection limits damage during a speaker-line fault. Undervoltage protection prevents unintended output activity when the supply rail is too low for reliable operation. STA50613TR is supplied in tape-and-reel packaging with a temperature-grade suffix reserved for industrial temperature-range production. Designers should confirm the complete pin description, exposed-slug connection, output configuration, and recommended output-filter network in the manufacturer datasheet before layout release. This page combines the device electrical envelope, application guidance, package details, and practical integration notes to accelerate design review. It also identifies where the same-footprint qualification must be checked against a specific candidate rather than assumed from a shared package family.

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STA50813TR

STA50813TR - 40V 4.5A Class D Audio Amplifier | STMicroelectronics

The STMicroelectronics STA50813TR is a 40 V, 4.5 A quad power half-bridge digital audio amplifier integrated in a 36-pin PowerSO-36 package. It can operate as a mono or stereo Class D output stage and can be reconfigured as a single bridge with double current capability. Its quad half-bridge architecture supports high-power audio systems requiring flexible channel configuration. A digital audio power amplifier is a power-management semiconductor that converts digital pulse information into high-current audio outputs. The half-bridge arrangement uses switches to apply the supply voltage alternately to each side of the speaker load. When two half-bridges drive one speaker, the device operates as a full bridge; multiple output stages can also be combined for stereo or multi-channel amplification. The STA50813TR supports a maximum supply voltage of 40 V and a maximum output current of 4.5 A. Its monolithic quad half-bridge stage uses STMicroelectronics Multipower BCD technology to combine analog control, digital drive, and power transistors in one package. The CONFIG pin can be connected to VDD to select single-bridge operation with doubled current capability. The device is intended for demanding powered-speaker systems where a compact external heat-spreading solution and efficient class-D conversion are important. A useful architectural distinction is that the STA50813TR is a digital-input power stage rather than a conventional analog-input audio amplifier. It therefore belongs near the final speaker-output stage of a digital audio signal chain, behind the audio processor, codec, DAC, or PWM controller that generates the required drive signals. This arrangement allows digital volume control and signal processing to occur upstream while the power stage handles speaker current efficiently. Typical uses include active loudspeakers, home-theater speaker systems, professional audio amplification, powered subwoofers, and compact multi-driver speakers. It is particularly appropriate when the system needs multiple Class D outputs, flexible bridge configuration, and operation from a supply up to 40 V. The exposed top pad also provides a direct path for heat removal from the power stage. Designers should carefully route the high-current switching outputs, provide stable input and bootstrap circuitry, connect the exposed thermal pad to an effective copper heat-spreading area, and keep sensitive control and audio signal traces away from output switching nodes. The CONFIG connection and all input-interface timing must be validated against the manufacturer’s recommended application circuit before production release. This product summary combines the identified device architecture, electrical ratings, package information, configuration options, and practical thermal and layout guidance. It also distinguishes verified drop-in replacements from related devices that merely share a broad product category, helping engineers evaluate replacement risk before modifying an existing amplifier design.

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STA510A13TR

STA510A13TR - 44V 5.5A Quad Class D Audio Power Stage

The STMicroelectronics STA510A13TR is a quad power half-bridge Class D audio amplifier stage with a 44 V maximum supply rating and 5.5 A output capability. It is designed for stereo, multi-channel, and configurable single-bridge audio systems, and is supplied in a 36-pin PowerSO package. The device uses multipower BCD technology and combines a CMOS-compatible control interface with complementary DMOS output stages. A Class D audio output stage converts a PWM carrier into a filtered audio waveform at the speaker load. Compared with a linear output stage, this architecture can provide high output-current capability and high conversion efficiency, while reducing heat and power loss when the load and switching design are appropriate. The STA510A family can operate as dual-bridge, reconfigured single-bridge, or binary half-bridge mode, depending on the CONFIG connection and operating configuration. Key features include a 44 V device rating, 5.5 A output current, a complementary DMOS output stage, and CMOS-compatible logic inputs. The device also includes thermal protection, thermal-warning output, undervoltage protection, and short-circuit protection. A minimum input and output pulse-width distortion of 150 mΩ is identified for the complementary output network, supporting compact Class D output-stage implementations with reduced conduction loss. The STA510A13TR is intended for powered speakers, home-theater receivers, active speakers, automotive audio systems, and consumer audio equipment. Its quad half-bridge organization allows four PWM input channels to drive two full bridges or other combinations of stereo, mono, and multi-channel configurations. The CONFIG pin provides additional flexibility when a designer needs to trade channel count against output-current capability. Designers should pay close attention to the datasheet power-supply recommendations, exposed-pad thermal path, output-filter requirements, input PWM timing, and protection behavior. The device is intended for Class D power stages rather than conventional analog voltage amplification. Keep the high-current output loop compact, provide adequate supply decoupling, and use the manufacturer reference layout to control switching noise and temperature rise. This product page organizes the key electrical characteristics, operating configurations, protection functions, and application considerations for the STA510A13TR. It also provides comparison guidance for compatible power-stage alternatives and highlights the engineering constraints that matter when designing a robust, thermally stable Class D audio output stage.

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STA510F

STA510F - 44V 5.5A Quad Half-Bridge Power Stage | STMicroelectronics

The STMicroelectronics STA510F is a 44 V, 5.5 A monolithic quad half-bridge power stage implemented in multipower BCD technology and supplied in a PowerSSO-36 EPU package. Its four configurable half-bridges can operate as two full bridges, four independent half-bridges, or a single bridge with double current capability when CONFIG is connected to Vdd. The device is positioned as a Class D audio power amplifier IC for mono, stereo, and multichannel systems. A power half-bridge is a switching amplifier output stage that uses complementary high-side and low-side transistors to drive a load between two supply rails. The half-bridge belongs to the Class D power-amplifier hierarchy, combines with an input or control IC, and ultimately forms a linear audio or motor-power subsystem. Unlike a linear output stage, the switching architecture transfers more of the applied energy to the load and reduces output-stage dissipation. The STA510F's principal verified specifications are its 44 V maximum operating voltage, 5.5 A current capability, quad half-bridge organization, and multipower BCD process technology. The CONFIG pin provides an important topology option: tying it to Vdd reallocates the available output current to a single-bridge configuration with double current capability. Thermal warning, thermal protection, under-voltage protection, and CMOS-compatible logic inputs are also identified in the available manufacturer data. The complementary DMOS output stage is designed for compact, high-current audio amplification without requiring a large external output transistor network. Logic-compatible control reduces the interface burden between the amplifier stage and a host processor or audio controller, while integrated thermal and under-voltage protection address common fault conditions in high-power audio equipment. Typical uses include automotive head units, stereo and multichannel audio amplifiers, home-theater power stages, and compact industrial or professional audio systems. Designers should confirm exact channel mapping, thermal limits, output configuration, and PCB requirements against the manufacturer datasheet before laying out a power amplifier board. For a new design, provide the PowerSSO-36 exposed-pad land pattern, robust high-current and high-voltage routing, low-impedance supply decoupling, and a thermal path that carries worst-case conduction losses away from the package. Account for the amplifier mode selected by CONFIG rather than treating all four half-bridges as an unrestricted five-channel output. This page combines the verified manufacturer description, distributor identification, configuration options, protection functions, and engineering-oriented design guidance. Pricing shown in the structured offer is a placeholder because the retrieved distributor results did not expose a numeric price; current inventory and quotation must therefore be confirmed with authorized distributors.

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STA510FTR

STA510FTR - 44V 5.5A Class-D Power Stage | STMicroelectronics

STMicroelectronics STA510FTR is a 44 V, 5.5 A quad power half-bridge Class-D audio power stage in a 36-pin PowerSSO package with an exposed pad. It supports a 10 V to 40 V supply range and can operate as a mono single-bridge stage, a stereo dual-bridge stage, or a four-channel half-bridge arrangement. The device uses multipower BCD technology and a complementary DMOS output stage. A power half-bridge is a switchable output section that uses two complementary transistor paths to drive a speaker load efficiently. Class-D power stages are audio amplifiers in which the output transistors operate primarily in switching states, reducing conduction loss compared with linear output stages. Within the amplifier hierarchy, the STA510FTR is a quad power half-bridge IC, an audio amplifier, a linear and switching power-management IC, and an integrated-circuit output driver. The principal device ratings are a 44 V maximum supply, a 5.5 A output-current rating, and a 10 V to 40 V operating supply range. The manufacturer identifies a single-bridge configuration in which the device can deliver 200 W into a 3 ohm load with 10% THD at 36 V. Its configuration flexibility allows two full bridges, one higher-current full bridge, or four half bridges to be implemented through appropriate output and CONFIG connections. The STA510F family combines a CMOS-compatible logic interface with a complementary DMOS output stage. According to the manufacturer product page, the input-pin thresholds are proportional to the VL pin voltage, which supports compatible source signaling. The configuration pin is tied to VDD for single-bridge operation with doubled current capability, while other wiring supports dual-bridge and binary half-bridge configurations. Typical uses include home-theater and multimedia speakers, powered subwoofers, compact consumer audio systems, automotive audio equipment, and industrial audio amplification. In a stereo implementation, the quad half-bridge arrangement can drive two speaker channels efficiently, while a mono bridge configuration concentrates the available output current into one higher-power channel. The exposed pad is central to thermal performance and requires careful PCB layout. Designers should verify the complete pinout, output-current limits, thermal limits, and switching behavior in the official manufacturer datasheet before applying the device. The power-supply decoupling network, exposed-pad copper, output inductor network, speaker wiring, and thermal management must be designed together because high-current switching stages can create both voltage transients and substantial heat dissipation. This product page consolidates verified manufacturer and distributor information, differentiates the supported bridge configurations, identifies where pinout and application details can be obtained, and explicitly separates verified electrical ratings from parameters that require confirmation. It also provides practical guidance for comparing the STA510FTR with other power-stage architectures without presenting unsupported substitutes as guaranteed drop-in replacements.

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