FDA903D-EHT

Overview

The FDA903D-EHT is a single-bridge Class D digital input automotive power amplifier designed for car audio, telematics, and e-call applications. It integrates a high-performance 108 dB D/A converter with powerful MOSFET outputs in a PowerSSO-36 package. The device supports I2S and TDM digital inputs with sampling frequencies of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. It operates on a wide supply voltage range from 3.3 V to 18 V and delivers up to 45 W output power. Key features include integrated thermal protection, short-to-VCC/GND diagnostics, open load detection, and compliance with CISPR 25 Class V standards.

Feature Summary

• Integrates a high-performance 108 dB D/A converter with I2S and TDM digital input support
• Provides comprehensive diagnostic capabilities including short circuit, open load, and thermal warnings
• Ensures electromagnetic compatibility through CISPR 25 Class V compliance
• Features wide operating supply voltage range suitable for automotive battery systems

Applications

• Car radio audio systems
• Automotive telematics units
• E-call emergency communication modules
• Vehicle noise and tone generators

Procurement Notes

Verify the specific ordering suffix EHT corresponds to the Tape And Reel packing type as documented. Confirm that the component meets AEC-Q100 qualification requirements for automotive grade reliability. Ensure the PowerSSO-36 slug-down package dimensions align with the target PCB layout constraints. Check for RoHS compliance status prior to integration into final assemblies.

Selection Notes

Select this amplifier for applications requiring a single-channel digital input solution with high power output. The integrated D/A converter eliminates the need for external DACs, simplifying the design. The wide supply voltage range accommodates various automotive electrical environments. Advanced diagnostics support system robustness and fault detection in critical safety applications.

Part Context

The FDA903D belongs to STMicroelectronics' FDA series of Class D amplifiers, utilizing advanced BCD technology. This series is optimized for automotive audio and telematics, offering high efficiency and low noise performance. The FDA903D specifically targets single-channel applications, providing a compact alternative to multi-channel solutions while maintaining high power delivery capabilities.

Replacement Considerations

The FDA803D is a related single-channel Class D amplifier within the same family. Verify if the lower power specifications of the FDA803D meet the application requirements. Both devices share similar interface protocols and diagnostic features but differ in output power capabilities.