STA333MLJ13TR - 2-Channel 20W Class-D Audio | STMicroelectronics
料号： STA333MLJ13TR ✓ 量产中STA333MLJ13TR 概述
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.
直接替换替代料： STA333MLJ13TR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： STA333MLJ13TR （相同外形与封装尺寸） ——差异在于 Operating Temperature Range, Package, Product Type.
该产品暂无直接替换替代料。
请求替代料STA333MLJ13TR 最大额定值与电气特性
| Product Type | Fully integrated Class-D audio amplifier processor |
| Number of Channels | 2 channels |
| 工作电源电压 | 4.5 V to 20 V |
| Rated Output Power | 20 W per channel |
| 输出配置 | 2-channel stereo |
| 封装 | 36-pin PowerSSO with exposed pad |
| 安装类型 | Surface mount |
| 工作温度范围 | 0°C to 70°C |
| 生命周期状态 | Active |
| Manufacturer | STMicroelectronics |
| Device Category | Audio Special Purpose integrated circuit |
| Packaging Format | Tape and reel |
| Amplifier Class | Class-D |
STA333MLJ13TR 36-pin powersso with exposed pad 引脚配置指南
STA333MLJ13TR（36-pin powersso with exposed pad 封装）的引脚配置。 该模拟元件具有输入、输出和电源引脚。请参阅制造商数据手册以了解失调调零、补偿和使能引脚配置。适用于信号调理和放大器电路。
暂无详细引脚数据： STA333MLJ13TR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
STA333MLJ13TR 适用于 6 应用s: Compact Multimedia Speaker, Powered Stereo Speaker, Home Audio Amplifier Module, Portable Audio System, Digital Audio Active Speaker, Two-Channel Reference Speaker.
Compact Multimedia Speaker
The STA333MLJ13TR is suited to a compact stereo multimedia speaker because it combines two channels in one 36-pin PowerSSO device and is listed at 20 W per channel from a 4.5 V to 20 V supply. It can drive left and right speaker channels while reducing the number of separate output-amplifier packages. The design must provide the required input conditioning, Class-D output filtering, and supply decoupling. Thermal planning should include the exposed pad, PCB copper, and the heat generated by sustained output because the stated 0°C to 70°C ambient range does not remove the need for enclosure-level heat control.
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Powered Stereo Speaker
A powered stereo speaker can use the STA333MLJ13TR as its final two-channel amplification stage when the target is a 20 W-per-channel Class-D design. The 4.5 V to 20 V operating range supports several portable and powered-speaker supply architectures. Designers should select speaker impedance and output-filter components according to the manufacturer guidance, and should reserve enough PCB copper around the exposed pad for heat removal. Mechanical stability and audible artifacts also depend on grounding, connector layout, and enclosure airflow, so amplifier selection is only one part of the acoustic system design.
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Home Audio Amplifier Module
The STA333MLJ13TR is appropriate for a compact home-audio amplifier module requiring left and right amplification channels in one surface-mount device. Its listed 20 W per channel capability can serve compact passive speakers when the supply, load, cooling, and filtering conditions are compatible. A module implementation should maintain short, properly terminated speaker outputs and keep switching-node areas away from audio inputs. The 36-pin PowerSSO package is well suited to multilayer PCB assembly, but its exposed pad must connect to the specified thermal and electrical plane without compromising audio return paths.
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Portable Audio System
A portable entertainment product can benefit from the STA333MLJ13TR when two Class-D channels are needed in a compact surface-mount assembly. Its stated 20 W per channel output and 4.5 V minimum operating voltage are useful for battery-derived systems operating through a suitable boost or buck-boost rail. Battery life depends on the complete power-conversion architecture because Class-D efficiency alone does not determine system consumption. Use the specified input and output networks, provide local high-frequency supply bypassing, and verify acoustic performance across the full battery-voltage range and speaker-load conditions.
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Digital Audio Active Speaker
The STA333MLJ13TR fits an active-speaker architecture that accepts processed stereo audio and drives two physical speakers. Digital source conditioning can be handled upstream by an audio processor, while the STA333MLJ13TR provides the final Class-D output stage. This division of responsibility allows the amplifier processor to focus on efficient power delivery to the transducers. The completed design should verify signal polarity, channel separation, filter stability, speaker impedance, and thermal rise. Particular care is needed around ground and power return paths because high-current switching output currents can create ground-potential differences that disturb sensitive audio circuitry.
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Two-Channel Reference Speaker
The STA333MLJ13TR may be used in a two-channel reference-speaker project when its listed output rating, supply range, and integrated processing match the design target. Compared with a discrete multi-stage approach, one dual-channel power package can simplify assembly and reduce the number of output-driver footprints. However, true drop-in substitution should not be inferred from similar amplifier functions. A candidate must match the PowerSSO-36 land pattern, pin functions, control protocol, external component values, and thermal requirements. Prototype the output filtering and verify channel balance and distortion before committing to production.
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推荐产品汇总
工程参考数据： STA333MLJ13TR ——对比、设计指导和合规信息。
选型指南
关键差异点
- Integrated dual-channel Class-D output architecture （对比 TPA3116D2)
- Wide confirmed operating supply range （对比 IRS2092)
- Single-package channel integration （对比 LM4780)
设计说明
Treat the exposed pad as both a thermal path and a required package feature. Use the manufacturer land pattern, connect the pad to the specified ground plane, and provide uninterrupted copper beneath and around the PowerSSO-36 footprint. Validate junction and enclosure temperature at the maximum intended channel output, speaker load, and ambient temperature. The listed 20 W-per-channel capability is not a guarantee that every PCB can sustain both channels continuously without an appropriate thermal design.
Separate audio inputs, references, and low-level control traces from high-current outputs and switching nodes. Keep input and output-filter components close to their associated device pins, maintain a compact return path, and follow the manufacturer’s recommended output-filter topology. Incorrect LC filtering, poor component placement, or output-to-input coupling can cause instability, excessive ripple, channel imbalance, or audible interference even when the amplifier operates within its stated supply and power limits.
Design the supply path for the load rather than only for average Class-D efficiency. Place the required bypass capacitors close to the supply and ground pins, keep the high-current loop small, and verify startup, voltage droop, and transient response at both channels’ rated output. The confirmed operating range is 4.5 V to 20 V, but usable continuous output at a particular supply and speaker impedance may be lower than the headline 20 W-per-channel figure.
合规信息
The verified product information identifies the device as active and surface mount but does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status.
