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

Featured Videos
ST's complete family of “intelligent” analog automotive power amplifiers
ST offers a complete range of intelligent analog power amplifiers for automotive audio systems.
What makes these power amplifiers "intelligent" is their reliable diagnostics array that detects the status of each speaker and can identify any failure or speaker disconnection. Two- or four-channel versions with different power levels and features, like the automatic offset control, are available. The new generation has very high efficiency (class SB, class SB-I), consuming less than a standard class AB, a valid alternative to class D power amplifiers. Furthermore, ST is the only company offering an automotive analog power amplifier with a digital input. All our amplifiers are compatible with hybrid and start-stop engines, working with a battery of just 6V.
STPA008 enriches your listening experience

The STPA008 is the latest automotive-grade class AB analog input power amplifier of the STPA family designed to enrich the car audio listening experience. It embeds 4 audio channels able to deliver a maximum power of 50 W each, it can drive loads as low as 2 W and operate from 6 to 18 V without popping or interruption. This makes the product compatible with start-stop and hybrid vehicles. An exciting sound quality level is guaranteed by its particular architecture built using ST's exclusive BCD6sA smart power technology, specifically designed for audio performance. The STPA008 helps ensure excellent immunity against interference coming from mobile devices (the so-called “GSM effect”), saving input filtering components (capacitors, inductors). Radio manufacturers can further save components and space on the board since all features are integrated and the STPA008 offers extreme robustness against misconnections.
The product is available in both Flexiwatt25 and Flexiwatt27 packages.
- TDA7562B 4 x 46 W multifunction quad power amplifier with built-in diagnostics features
- TDA7561 Multifunction quad power amplifier with built-in diagnostics features
- TDA7560 4 x 51 W quad bridge car radio amplifier
- TDA7850 4 x 50 W MOSFET quad bridge power amplifier
- TDA75610DLVPD 4 x 45 W differential power amplifier with full I2C diagnostics, high efficiency and low voltage operation
- TDA7569BDLVPD 4 x 50 W differential power amplifier with full I2C diagnostics, high efficiency and low voltage operation
- TDA7563A 4 x 50 W power amplifier with high efficiency and built-in I2C diagnostic
- TDA7851A 4 x 48 W MOSFET quad bridge power amplifier
- TDA7567PD 4 x 50 W differential quad power amplifier with built-in diagnostics features
- TDA7851F 4 x 48 W MOSFET quad bridge power amplifier
- TDA7569BLV 4 x 50 W differential power amplifier with full I2C diagnostics, high efficiency and low voltage operation
- TDA7391LV 40 W bridge car radio amplifier with low voltage operation
- STPA001 4 x 50 W MOSFET quad bridge power amplifier
- TDA75613LV Low voltage operation, high efficiency (class SB), intelligent, quad BTL output power amplifier with speaker safety routine (SSR), full I2C diagnostics including tweeter detection and hardware stand-by/mute
- TDA7576B Dual bridge MOSFET power amplifier for 24 V systems
- TDA7851L 4 x 48 W MOSFET quad bridge power amplifier
- TDA7391 35 W bridge car radio amplifier
- TDA7575B 2 x 75W multifunction dual-bridge power amplifier with integrated digital diagnostics
- TDA7386 Quad BTL output power amplifier with stand-by and mute inputs
- TDA7385 4 x 42 W quad bridge car radio amplifier
- TDA7384A 4 x 46 W quad bridge car radio amplifier
- TDA7566 4 x 40 W multifunction quad power amplifier with built-in diagnostics features
- STPA008 4 x 50 W MOSFET quad bridge power amplifier
- TDA2005 20 W bridge/stereo amplifier for car radio
- TDA7396 Differential input, single BTL output power amplifier with clip detection
- TDA7803A High efficiency digital input automotive quad power amplifier with built-in diagnostics features, start stop compatible
- TDA7808 High efficiency digital input automotive quad power amplifier, ?start stop? compatible
- TDA7391PD 32 W bridge car radio amplifier
- TDA7850A Quad BTP output with HSD, offset detection , stand-by and mute inputs
- STPA002 4 x 52 W quad bridge power amplifier with low voltage operation
- TDA7802 High efficiency digital input quad power amplifier with built-in diagnostics features, ?start stop? compatible
- TDA7577BLV 2 x 75 W dual-bridge power amplifier with I2C complete diagnostics and "start-stop" profile (6 V operation)
- TDA75612LV 4 x 45 W power amplifier with full I2C diagnostics, SSR and low voltage operation
- TDA7387 4 x 41 W quad bridge car radio amplifier
- TDA75616LV 4 x 45 W power amplifier with full I2C diagnostics, SSR and low voltage operation
- TDA2004R 10 + 10 W stereo amplifier for car radio
- TDA7801 "Digital input quad power amplifier with built-in diagnostics features
- TDA7563B 4 x 50 W multifunction quad power amplifier with built-in diagnostics feature
- TDA7565 Intelligent high efficiency (class SB) quad BTL ouput with full I2C diagnostics, built in step up and mute input
- TDA7381 4 x 25 W quad bridge car radio amplifier
- TDA7376B 2 x 35 W Power amplifier for car radio
- TDA7376PD 2 x 35 W power amplifier for car radio
- TDA7375V 2 x 35W dual/quad power amplifier for car radio
- STPA003 4 x 52 W quad bridge power amplifier with low voltage operation
- TDA7375AV 2 x 37 W dual/quad power amplifier for car radio
- TDA7562BEP Intelligent quad BTL output power amplifier with full I2C diagnostics and stand-by/mute input
- TDA7564B 4 x 50W multifunction quad power amplifier with built-in diagnostics feature
- TDA75610SLV 4 x 45 W differential power amplifier with full I2C diagnostics, high efficiency and low voltage operation
- TDA7562 MULTIFUNCTION QUAD POWER AMPLIFIER WITH BUILT-IN DIAGNOSTICS FEATURES
- TDA7388A 4 x 42 W quad bridge car radio amplifier
- TDA75610LV Low voltage operation, intelligent, quad BTL output power amplifier with full I2C diagnostics including tweeter detection and hardware stand-by/mute
- TDA7388 4 x 45 W quad bridge car radio amplifier