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.