FDA901 Data brief 4 x 50 W class-D digital input automotive power amplifier with load current monitoring and low voltage operation Features • AEC-Q100 qualified • Integrated 110 dB D/A conversion • I2S and TDM digital input (3.3/1.8 V) LQFP64 (exposed pad up) • Input sampling frequency: 44.1 kHz, 48 kHz, 96 kHz and 192 kHz GAPGPS01631 • Class-D channels with 93% efficiency • CISPR25 - Class V (Fourth Edition) • Low radiation function (LRF) • Idle tones free DAC • Output lowpass filter included in the feedback allowing superior audio performance • High output power capability – 28 W/4 Ω 10% THD, Vd = 14.4 V – Max. output power: 4 x 50 W/4 Ω @ 15.2 V, 1 kHz • Full I2C bus driving (3.3/1.8 V): – Channel independent Eco-Mode – Channel independent soft play/mute – I2C bus diagnostics, including DC and AC load detection and load value recognition • Integrated fault protection Product status link • Input and output offset detector FDA901 • Clipping detector • Real time load current monitoring (on I2C and TDM data lines) Device summary • ESD protection Order codePackagePacking • 6 V operation ("Start - Stop" engines compatibility) FDA901-VYY LQFP64 Tray • 2 and 1 Ω load driving capability (exposed Tape & FDA901-VYT pad up) Reel Description FDA901 is a new BCD technology Quad Bridge class D amplifier, specially intended for car radio automotive applications. Thanks to the technology used, it is possible to integrate a high performance D/A converter together with powerful MOSFET outputs in class D, to get an outstanding efficiency compared to the standard class AB. The integrated D/A converter allows to reach outstanding performances (115 dB S/N ratio with 110 dB of dynamic range). The feedback loop includes the output L-C low- pass filter, allowing superior frequency response linearity and lower distortion independently from the inductor and capacitor quality. FDA901 is fully configurable through I2C bus, moreover it includes not only the most complete load diagnostic matrix but also a unique real time load current acquisition on I2C and I2S data lines, enabling sophisticated speaker monitoring functions. Thanks to the solutions implemented to contain EMI emissions, the device is intended to be used in the standard single DIN car-radio box together with the tuner. DB3856 - Rev 1 - March 2019 www.st.com For further information contact your local STMicroelectronics sales office. Document Outline 1 Block diagram and pins description 1.1 Block diagram 1.2 Pins description 2 Electrical specifications 2.1 Absolute maximum ratings 2.2 Thermal data 3 General information 3.1 New feedback topology 3.2 LC filter design 3.3 Load possibilities 4 Package information 4.1 LQFP64 (10x10x1.4 mm exp. pad up) package information 4.2 LQFP64 (10x10x1.4 mm exp. pad up) marking information Revision history
