HFDA90D-F2Y

Overview

The HFDA90D-F2Y is a four-channel Class-D automotive audio amplifier by STMicroelectronics, designed for high-fidelity sound in vehicles. It features integrated digital-to-analog conversion and supports I2S/TDM inputs with selectable sample rates up to 192 kHz. The device operates on a 4.5 V–18 V supply, withstands 40 V load dumps, and delivers up to 4x47.5 W into 2 Ω loads at 10% THD. It includes comprehensive diagnostics, AEC-Q100 qualification, and EMI compliance per CISPR25.

Feature Summary

• Integrates advanced GSM noise immunity and 2 MHz switching PWM output stages for superior audio performance and compact design.
• Features a broad diagnostics matrix to support demanding OEM requirements for speaker control and system robustness.
• Supports wide-band applications up to 40 kHz with extremely low noise and total harmonic distortion levels.
• Housed in a compact LQFP48L package suitable for various automotive application levels.

Applications

• Automotive infotainment systems requiring high-power multi-channel audio amplification
• Vehicle audio architectures needing start/stop cranking support down to 4.5 V
• Applications requiring strict EMI compliance evaluated according to CISPR25 standards

Procurement Notes

Verify the specific suffix F2Y against the official datasheet to confirm packaging and tape-and-reel specifications. Ensure compatibility with your PCB footprint for the LQFP48L package. Confirm that your system design meets the 4.5 V minimum operating voltage during cranking conditions. Validate thermal management strategies for the intended power output levels into 2 Ω or 4 Ω loads.

Selection Notes

Select this component when high channel count and digital input flexibility are required in an automotive environment. It is suitable for designs prioritizing low latency and fast turn-on times. Consider its integrated DAC if external converters are undesirable. Evaluate its power delivery capabilities against your speaker impedance requirements to ensure optimal efficiency and thermal performance within the vehicle's electrical system constraints.

Part Context

This part belongs to STMicroelectronics' HFDA series of Class-D audio amplifiers. These devices utilize BCD technology to integrate power MOSFETs with digital control logic. The series targets modern automotive audio systems, offering solutions that balance high acoustic performance with electromagnetic interference reduction and diagnostic capabilities for enhanced vehicle reliability.

Replacement Considerations

Check for other variants within the HFDA family that may offer different pinouts or power ratings. Verify if alternative suppliers provide equivalent AEC-Q100 qualified parts with similar I2S/TDM interfaces. Ensure any substitute matches the LQFP48L package dimensions and thermal characteristics for direct replacement without board redesign.