STMicroelectronics FDA903S Class-D Automotive Audio Amplifier
STMicroelectronics FDA903S Class-D Automotive Audio Amplifier is specifically designed for automotive applications, especially e-Call and telematics. The FDA903S incorporates a 24-bit, 100dB DAC conversion and PWM class-D output stage with feedback before the LC filter. This configuration can create the design of a compact and inexpensive application.
The STM FDA903S Class-D Automotive Audio Amplifier supports I2S and TDM digital bit stream up to 16CH with several sampling frequencies from 8kHz to 96kHz. FDA903S embeds a complete diagnostic in play, including real-time load-current monitoring and a digital admittance meter, to deliver the most demanding OEM requirements regarding speaker control and system robustness/ reliability. The FDA903S supports start stop cranking down to 3.3V.
The FDA903S is housed in a very compact and thin QFN 5x5 package.
Features
- AEC-Q100 qualified
- Integrated 100 dB 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%
- Noise: 80μV A-weighted: 20kHz
- 8Ω, 4Ω driving capability
- Input amplitude limiter (configurable through I2C)
- Load current monitor
- 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
- DAM (Digital-Admittance-Meter)
- 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)
Applications
- Telematics
- e-Call
Block Diagram
Related Products
STMicroelectronics FDA803S Class-D Automotive Audio Amplifier
Specifically designed for automotive applications, especially e-Call and Telematics.
Evaluation Board
STMicroelectronics EVAL-FDA903S Class-D Amplifier Evaluation Board
Demonstrates the capabilities of the FDA803S/FDA903S automotive digital class-D power amplifiers.
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