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Automotive Class-AB Audio Power Amplifiers

ST offers a complete class-AB product portfolio. As well as standard class-AB power amplifiers, ST proposes audio amplifiers in class SB (Single-ended Bridge) and SB-I (SB improved). As a result of their high efficiency, these classes reduce power dissipation by up to 50% compared to standard class AB, simplifying thermal management in current power sets. Moreover, ST has introduced a digital input to offer a clean sound, immune to external interferences. Amplifiers can now be directly connected to the DSP output without any signal conversion. ST also proposes amplifiers that are compatible with start-stop and hybrid engines.

ST's class-AB automotive audio amps offer:

  • Clean, powerful audio
  • A wide portfolio, single-channel devices to powerful quad-channel single-chip devices
  • Robust designs with integrated protection against short circuits, ESD, load dumping, over-temperature
  • Ability to drive very low impedance speakers (as low as 1 ohm)
  • Products compliant with new stop-start engine and hybrid engine standards
  • Optional I²C interface and diagnostics
  • Optional digital input
  • Optional augmented efficiency
Class AB automotive audio amplifiers

ST makes class AB audio the prime choice with a new digital input power amplifier

TDA7802The TDA7802 is the first automotive-qualified, start-stop compliant, analog power amplifier with digital input. It combines the simplicity and cost effectiveness of class AB amplifiers with the sound quality of a digital stream and an efficiency previously unattainable by analog amplifiers. Compared to standard class AB amplifiers, it reduces power dissipation by up to 50%, meeting the standards of car makers for start-stop systems and hybrid vehicles. The TDA7802 is a 4-channel power amplifier with integrated diagnostic features.

STPA003 brings true sound quality in your car

STPA003 is a new automotive-grade class AB analog input power amplifier of the STPA family designed to improve car audio listening experience with a minimum effort for the car maker. With its 4 channels able to deliver a maximum power of 52W each, the possibility to drive load as low as 2 ohm and to operate from 6V to 18V without popping or interruption, compatible with start-stop and hybrid vehicles, this amplifier finds its way into every modern infotainment system. The particular smart power BCD6sA technology, specifically designed for audio performance, brings the sound quality to a level never seen in analog power amplifiers. No more worries about connectivity with mobile devices, since the great architecture of the product helps to get excellent immunity against interferences coming from mobile devices (the so called “GSM effect”) with no needs for input filtering (capacitors, inductors). The radio maker can further save components and space on the board since all features are integrated and STPA003 offers extreme robustness against misconnections.
The product is available in Flexiwatt25 and Flexiwatt27 packages.
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