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)
• Wide supply operating range: 3.3 V - 18 V
• PWM frequency switching selectable by I2C
– 352.8 kHz, 384kHz, 411.6 kHz, 448 kHz
• 2 I2C addresses
• MOSFET power outputs
– Typ 10 W 4 Ω @ 14.4 V, 1 kHz THD = 1 %
– Typ 5 W 8 Ω @ 14.4 V, 1 kHz THD = 1 %
• Noise: 80 μV A-weighted: 20 kHz
• 8 Ω, 4 Ω driving capability
• Input amplitude limiter (configurable through I2C)
• I2C full configurability and diagnostic
– Startup diagnostic
– Input voltage amplitude limiter function (configurable through I2C)
– 4 x Thermal warning
– DC diagnostic
– OCP protection scheme configurable
– Mute time configuration
– DAM (Digital-Admittance-Meter)
• Capability to run complete diagnostic in play
– Configurable Clipping Detector
– One of the Thermal Warnings
– Over Current Protection
– Open Load detection
– High voltage mute
• Load current monitor
• 2 CD/Diag pin
• Integrated ESD and short circuit protection
• QFN32 wettable flanks
• Tested according to CISPR 25 - Class V (Fourth edition)

Description
The FDA903S is the new ST single channel class-D audio amplifier, specifically
designed for automotive applications. The FDA903S integrates a 24-bit, 100 dB
DAC conversion and PWM class-D output stage with feedback before LC filter. This
configuration enables the design of a compact and inexpensive application.
The FDA903S supports I2S and TDM digital bit stream up to 16CH with several
sampling frequencies from 8 kHz up to 96 kHz. FDA903S embeds a complete
diagnostic in play, including real-time load-current monitoring and digital admittance
meter, to support the most demanding OEM requirements in terms of speaker control
and system robustness/ reliability.
The FDA903S supports start stop cranking down to 3.3 V and it is available in a very
compact and thin QFN 5x5 package. Thus the FDA903S is suitable for any level of
automotive application especially e-Call and Telematics.