STMicroelectronics FDA803S Class-D Automotive Audio Amplifier

STMicroelectronics FDA803S Class-D Automotive Audio Amplifier is specifically designed for automotive applications, especially e-Call and Telematics. The FDA803S combines a 24-bit, 100dB DAC conversion and PWM class-D output stage with feedback before the LC filter. This configuration allows the design of a compact and inexpensive application.

The STM FDA803S Class-D Automotive Audio Amplifier delivers I2S and TDM digital bit stream up to 16CH with several sampling frequencies from 8kHz up to 96kHz. The FDA803S embeds a complete diagnostic in play to sustain the most demanding OEM requirements regarding speaker control and system robustness/reliability. Additionally, the FDA803S supports start stop cranking down to 3.3V.

The FDA803S is housed in a very compact and thin QFN 5x5 package.

Features

AEC-Q100 qualified
Integrated 100dB D/A conversion
I²S and TDM digital input (up to 16CH TDM)
Selectable input sample rate frequency (8/16/32/44.1/48/96)
3.3V to 18V Wide supply operating range
PWM frequency switching selectable by I²C
- 352.8kHz, 384kHz, 411.6kHz, 448kHz
2x I²C addresses
MOSFET power outputs
- Typ 10W 4Ω @ 14.4V, 1kHz THD = 1 %
- Typ 5W 8Ω @ 14.4V, 1kHz THD = 1 %
80μV A-weighted: 20kHz Noise
8Ω, 4Ω driving capability
Input amplitude limiter (configurable through I²C)
2 CD/Diag pin
Integrated ESD and short circuit protection

I²C full configurability and diagnostic
- Startup diagnostic
- Input voltage amplitude limiter function (configurable through I²C)
- 4x Thermal warning
- DC diagnostic
- OCP protection scheme configurable
- Mute time configuration
Capability to run a complete diagnostic in play
- Configurable clipping detector
- One of the thermal warnings
- Over current protection
- Open load detection
- High voltage mute
QFN32 with wettable flanks
Tested according to CISPR 25 - Class V (Fourth edition)