FDA803U-KBX

Overview

The FDA803U-KBX is a single-channel Class D automotive power amplifier in a PowerSSO-36 package. It operates on a supply voltage range of 3.3V to 18V and delivers up to 45W into a 2-ohm load. The device supports digital inputs including I2S and TDM with sampling frequencies of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. It features integrated diagnostics, thermal protection, and AEC-Q100 qualification for operation between -40°C and 125°C.

Feature Summary

• Integrates a high-performance 108 dB D/A converter with I2S and TDM digital input interfaces.
• Includes comprehensive I2C bus diagnostics for short-to-VCC/GND, open/short load, DC offset, and clipping detection.
• Complies with CISPR 25 Class V standards for low electromagnetic interference.

Applications

• Automotive car radio systems
• Telematics units
• E-call emergency systems

Procurement Notes

Verify the specific suffix KBX against the manufacturer's official datasheet to confirm packaging type and tape-and-reel specifications. Ensure the component meets AEC-Q100 grade requirements for your target automotive application. Cross-reference the PowerSSO-36 footprint dimensions with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component for applications requiring direct digital audio input without external DACs. It is suitable for designs needing wide voltage tolerance from 3.3V to 18V. Consider its integrated diagnostic capabilities if system monitoring via I2C is required. Verify that the 36-pin PowerSSO package fits within the available board space and thermal constraints.

Part Context

This part belongs to the FDA803 family of automotive Class D amplifiers. It utilizes advanced BCD technology to integrate MOSFET outputs and digital control logic. The series is designed specifically for robust performance in noisy automotive environments, offering high output power capability and extensive protection features compared to standard consumer audio amplifiers.

Replacement Considerations

Check for FDA803 variants with different suffixes for alternative packaging options. Ensure any substitute maintains the same PowerSSO-36 pinout and electrical characteristics. Verify compatibility with existing I2C diagnostic protocols if replacing in an active design.

FAQ

What digital audio interfaces are supported?

The FDA803U-KBX supports I2S and TDM (4/8/16 channel) digital inputs.

Does the device include built-in diagnostics?

Yes, it provides I2C-accessible diagnostics for shorts, open loads, thermal warnings, DC offset, and clipping.