Developer of the first automotive class-D amplifier with digital input, ST supplies audio power amplifiers to the most important automotive audio makers for both premium sound systems and head units.
We offer a broad product portfolio covering all multi-channel requirements and continue to develop innovative solutions to always ensure the best sound quality combined with maximum energy efficiency and advanced features.
- High amplification efficiency ratings
- Robust automotive design with integrated protection against overstress conditions, such as short-circuits, electrostatic discharge (ESD), load dump, or over-temperature
- A very advanced diagnostics processor
- A proprietary feedback loop architecture, addressing the need for lower system cost and electromagnetic emissions
- Fully digital processing
- Ability to drive very low impedance speakers (as low as 1 ohm)
- Compliance with stop/start and hybrid engine standards
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Introduction to Class D amplifiers
Get started with ST's FDA801 - Best Car Radio ClassD efficiency on the market - 4x50 W class-D digital input power amplifier with I2C diagnostics and low voltage operation
Power amplifier system for automotive applications
New single-channel Class-D amplifiers with unique diagnostic matrix ensures high-end audio performance
Featuring advanced diagnostics, high efficiency and a unique load current monitor feature 
to ensure high system reliability, FDA803D and FDA903D are the latest amplifiers in our FDA80x family of automotive Class-D audio power amplifiers.
Thanks to an innovative architecture that includes a low-pass output filter in the feedback loop, these devices offer high-quality sound at a reduced system cost. Moreover, supporting a very wide supply voltage range (from 3.3 to 18 V) they are the best fit for any automotive audio application including standard car audio systems to today's e-call and acoustic vehicle alerting systems (AVAS).
to ensure high system reliability, FDA803D and FDA903D are the latest amplifiers in our FDA80x family of automotive Class-D audio power amplifiers. Thanks to an innovative architecture that includes a low-pass output filter in the feedback loop, these devices offer high-quality sound at a reduced system cost. Moreover, supporting a very wide supply voltage range (from 3.3 to 18 V) they are the best fit for any automotive audio application including standard car audio systems to today's e-call and acoustic vehicle alerting systems (AVAS).
- FDA903Q 1 Channel class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematics
- FDA802 2x150 W/1x300 W class D digital input automotive power amplifier with diagnostics features and low voltage
- FDA903S 1 x 10 W class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematics
- FDA450LV 4 x 50 W PWM digital input power amplifier with built-in diagnostics features and low voltage operation
- FDA802S 2 channels class-D digital input automotive power amplifier with I2C diagnostics and low voltage operation for car radio applications
- FDA803Q 1 Channel class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematics
- FDA903U 1 x 45 W class D digital input automotive power amplifier with ILoad current monitoring, wide voltage operation range for car audio and telematic
- FDA4100LV 4 x 135 W / 2 x 270 W PWM digital input automotive power amplifier with I2C diagnostics, step-up driver and low voltage operation
- FDA803S 1 x 10 W class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematics
- FDA801 4x50 W class-D digital input power amplifier with I2C diagnostics and low voltage operation
- FDA802SB 2 channels class-D digital input automotive power amplifier with I2C diagnostics and low voltage operation for car radio applications
- FDA803U 1 x 45 W class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematic
- FDA901 4 x 50 W class-D digital input power amplifier with load current monitoring and low voltage operation
- FDA801B 4 x 50 W class-D digital input power amplifier with I2C diagnostics, digital impedance meter (DIM) and low voltage operation
- FDA903D 1 x 45 W class D digital input automotive power amplifier with ILoad current monitoring, wide voltage operation range for car audio and telematic
- FDA802B 2x150 W/1x300 W class D digital input automotive power amplifier with load value recognition and low voltage operation
- FDA803D 1 x 45 W class D digital input automotive power amplifier with diagnostics, wide voltage operation range for car audio and telematics
- FDA2100BLV 2 x 180 W / 1 x 300 W PWM digital input automotive power amplifier with built-in diagnostics features and step-up drive
- FDA802A 2x150 W/1x300 W class D digital input automotive power amplifier with diagnostics features and low voltage
- HFDA802 2 x 80 W digital input class-D automotive audio amplifier with Hi-Fi audio quality, advanced diagnostics, 2 MHz switching frequency and High Resolution Bandwidth
- FDA2100LV 2 x 180 W / 1 x 300 W PWM digital input power amplifier with built-in diagnostics features and step-up driver
- FDA802AB 2x150 W/1x300 W class D digital input automotive power amplifier with diagnostics features and low voltage
- HFDA801A 4x80W digital input class-D automotive audio amplifier with Hi-Fi audio quality, advanced diagnostics, 2MHz switching frequency and High Resolution Bandwidth