Amplificadores de audio
Productos (3)
IRS2093MTRPBF - 4-Ch Class D Audio Driver, 100V, 0.6A | Infineon
The Infineon IRS2093MTRPBF is a 4-channel protected Class D audio amplifier driver integrating high-voltage gate drivers with PWM modulators in a 48-pin MLPQ (PG-VQFN-48) package. Per the manufacturer datasheet, it delivers 0.6 A gate-drive current at up to 100 V bus voltage, supports half-bridge and full-bridge topologies, and includes programmable over-current protection plus programmable dead-time generation. The device is supplied on Tape & Reel (TR) and is a lead-free, RoHS-compliant part designed for home audio and professional amplifier systems. A Class D audio amplifier is a switching amplifier topology that uses pulse-width modulation (PWM) to drive a power stage at high efficiency (typically 85-95%) rather than dissipating energy as heat like a linear (Class A/B) amplifier. The IRS2093MTRPBF sits in the controller/driver tier of the Class D hierarchy - it contains the modulator and gate drivers but requires external power MOSFETs and an output LC filter. This makes it part of the broader audio amplifier IC family within power management and amplifier IC categories. Key features include four independent floating analog inputs with PWM modulators, integrated high-side/low-side gate drivers capable of 0.6 A sink/source, programmable dead-time to prevent shoot-through, programmable over-current protection (OCP) with auto-recovery, under-voltage lockout (UVLO) for both VCC and VBS rails, and a protection control interface pin (SD/OTW) for fault reporting and thermal warning. The 48-pin MLPQ package provides an exposed thermal pad to dissipate gate-driver losses. Architecture-wise, the IRS2093MTRPBF uses a bipolar CMOS-DMOS (BCD) high-voltage process that allows the floating high-side driver to operate up to 100 V while the low-side and logic sections operate from lower rails. Each channel's modulator accepts a small-signal analog input and generates complementary PWM outputs at the gate driver stage, with dead-time inserted between the high-side and low-side switches to prevent cross-conduction. Typical applications include 4-channel home theater amplifiers, 2.1/4.1 subwoofer-and-satellite systems, multi-channel professional audio amplifiers, automotive head-unit amplifier stages, and powered studio monitor speakers. The wide 100 V bus rating supports high-power designs (several hundred watts per channel into 4 ohms) when paired with appropriately rated external MOSFETs. Design consideration: the IRS2093MTRPBF requires a carefully designed output LC reconstruction filter per channel - component values depend on switching frequency (typically 350-500 kHz), load impedance, and desired audio bandwidth. Incorrect filter design is the most common source of EMI, THD degradation, or instability in Class D designs using this driver. This page synthesizes distributor pricing, drop-in alternatives, and practical design considerations not found in the manufacturer datasheet alone, giving engineers a faster path from selection to working prototype.
STK4432 - 25W+25W AF Power Amplifier Hybrid IC | Sanyo
The Sanyo STK4432 is a 2-channel thick-film hybrid audio-frequency (AF) power amplifier IC delivering a minimum of 25W + 25W continuous output power into 8 ohm loads with total harmonic distortion (THD) of 1.0 percent or less. Housed in a single-in-line slim package measuring 31 mm in height, it is pin-compatible with the legacy STK430 series, simplifying retrofit and upgrade designs in established audio platforms. An AF power amplifier hybrid IC is a co-packaged module that integrates a driver stage, output transistors, and (typically) protection circuitry on a single ceramic substrate with an aluminum heatsink tab. The thick-film hybrid topology sits in the hierarchy between monolithic Class-AB audio amplifier ICs (e.g., TDA7293, LM3886) and discrete Darlington output stages, occupying a niche defined by high output power, simplified BOM, and moderate PCB footprint. Key specifications include a recommended supply voltage range suitable for 2-channel 25W operation, a maximum case temperature of 125 degrees C permitting reduced heatsink sizing, and built-in thermal protection. The slim 31 mm package enables compact stereo receiver designs, while pin compatibility with STK430 series drop-in replacements supports legacy repair and design refresh cycles. The internal architecture uses a complementary Class-AB push-pull output stage with on-chip bias stabilization and DC offset minimization, achieving the 1.0 percent THD figure at rated output. Operating voltage is unipolar single-rail (typical ±25V or single 25V depending on application circuit), with the device dissipating up to 30W at the IC level under simultaneous two-channel sine-wave drive. Typical applications include home stereo integrated amplifiers, karaoke systems, multimedia speaker amplifiers, and replacement boards for legacy consumer audio equipment originally designed around the STK430/STK4100/STK4200 series. When designing with this device, use a heatsink sized to keep case temperature below 125 degrees C at maximum continuous output, and follow the reference printed circuit board layout from the manufacturer datasheet to maintain channel-to-channel isolation and minimize THD. This page synthesizes manufacturer datasheet specifications, distributor sourcing data, drop-in pin-compatible alternatives, and practical design notes not found in any single distributor listing.
STK492-1 - 3-Channel Audio Power Amplifier Hybrid IC | Sanyo
The Sanyo STK492-1 is a 3-channel audio power amplifier hybrid IC from the classic STK series, designed for high-fidelity multi-channel audio applications including home theater systems and AV receivers. The part is a Class-AB power module that integrates three independent amplifier channels into a single insulated metal substrate, eliminating the need for individual channel modules and simplifying chassis layout. STK492-1 typically operates from symmetrical ±25 V to ±40 V dual supplies, delivering tens of watts per channel into 6 ohm or 8 ohm loads depending on supply rails and heatsinking. The hybrid construction uses a thick aluminum baseplate with discrete output transistors and driver stage, providing high reliability and good thermal dissipation for sustained high-power operation. An audio power amplifier IC (also called an audio amplifier IC, power amplifier module, or Class-AB amplifier) is a specialized integrated circuit that boosts low-level analog audio signals to levels capable of driving loudspeakers. Audio power amplifier ICs sit in the signal chain hierarchy between pre-amplifier/voltage amplifier and loudspeaker/transducer, belong to the broader family of analog amplifiers, and within the integrated circuit taxonomy fall under power management and audio amplifier IC categories. The STK hybrid amplifier series was historically one of the most popular audio power amplifier families in consumer electronics, particularly for AV receivers, mini-component systems, and car audio amplifiers. Key features of the STK492-1 include three independent amplifier channels on one substrate, internal thermal protection circuitry, high output power capability suitable for 5.1- or 6-channel system designs when paired with companion STK ICs, and a robust SIP (Single-In-Line Package) module form. The internal protection includes thermal shutdown that automatically mutes output when junction temperature exceeds design limits, preventing catastrophic failure during fault conditions. Typical total harmonic distortion is in the 0.01% to 0.08% range at rated output, with channel separation exceeding the 55dB to 70dB range suitable for multi-channel hi-fi playback. The STK492-1 architecture uses a Darlington-connected output stage with emitter resistors for current sharing, providing robust short-circuit and load-mismatch tolerance. The aluminum baseplate allows mounting directly to a chassis heatsink with thermal compound, achieving typical thermal resistance of 1.5 C/W to 2.5 C/W with proper mounting. Each channel contains its own driver and output stage, with internal bias networks that simplify external circuit design. The supply voltage range and output power scale together, so selecting the appropriate transformer or motor voltages for a given output power requirement is critical for optimal performance and reliability. Typical applications for the STK492-1 include AV receiver surround amplifier modules, home theater multi-channel power amplifiers, car audio amplifier modules, professional audio equipment power stages, and vintage hi-fi amplifier restoration projects. The three-channel configuration is particularly well suited to driving front-left, front-right, and center channels of a home theater system, when paired with additional STK modules for the rear and subwoofer channels. The module form factor also makes it a popular choice for DIY audio amplifier projects where high power and good sound quality are required in a single-package format. Engineers should stock the parts in matched sets if used in multi-channel amplifiers to maintain channel-to-channel gain consistency. When designing with the STK492-1, ensure adequate heatsinking with thermal compound between the module base and the chassis. Use a regulated dual-polarity power supply rated for the peak audio current demand (typically 5-10 A per channel), and include output coupling capacitors sized for the -3 dB low-frequency cutoff (typically 2200 uF to 4700 uF for 20 Hz cutoff into 8 ohm loads). Disable the input signal during ground-fault disconnection to avoid DC transients at the speakers during the momentary over-current event. This page synthesizes distributor pricing, datasheet excerpts, drop-in STK-series alternatives, and practical restoration design notes not found in the original Sanyo datasheet alone.