FDA903D-EHX

Overview

The FDA903D-EHX is a single-bridge Class D automotive power amplifier featuring integrated digital inputs and high-performance MOSFET outputs. It incorporates a 108 dB D/A converter and supports I2S and TDM interfaces with sampling frequencies up to 192 kHz. The device operates within a wide voltage range of 3.3 V to 18 V, ensuring compatibility with standard car batteries and emergency power sources. Designed for compact applications, it achieves 90% efficiency and includes an output L-C filter within the feedback loop for superior audio linearity. The component is AEC-Q100 qualified and compliant with CISPR 25 Class V standards.

Feature Summary

• Integrates a high-performance 108 dB D/A converter with powerful MOSFET Class D outputs for compact, efficient audio amplification.
• Supports flexible digital input configurations including I2S and multi-channel TDM with selectable sampling rates up to 192 kHz.
• Features comprehensive diagnostics including open load and DC offset detection in play mode via a configurable I2C bus interface.

Applications

• Car radio audio systems
• Automotive telematics units
• E-call emergency communication modules

Procurement Notes

Verify the specific suffix 'EHX' against official STMicroelectronics documentation to confirm package type and tape-and-reel specifications. Ensure the selected variant matches the required operating temperature range and EMI compliance standards for the target automotive application before finalizing procurement.

Selection Notes

Select this component for applications requiring a single-channel digital Class D solution with integrated DAC functionality. It is suitable for designs needing wide supply voltage tolerance from 3.3 V to 18 V and strict EMI compliance. Consider its I2C configurability and diagnostic features for robust system management in space-constrained automotive enclosures.

Part Context

The FDA903D belongs to STMicroelectronics' family of automotive digital Class D power amplifiers. These devices utilize advanced BCD technology to integrate digital processing and power stages on a single chip. This integration reduces external component count and board size while maintaining high audio fidelity and efficiency for modern vehicle infotainment and safety systems.

Replacement Considerations

The EVAL-FDA903D evaluation board is designed for testing the FDA903D series. For pin-compatible alternatives or upgrades within the same product family, consult official substitution guides as direct cross-model replacements may require schematic adjustments due to differing pinouts or feature sets.