HFDA801L-VYT

Overview

The STMicroelectronics HFDA801L-VYT is a four-channel Class-D digital input automotive audio amplifier based on BCD technology. It integrates a 24-bit, 120dB DAC and supports I2S and TDM digital inputs with selectable sampling rates up to 192kHz. The device features a 2MHz switching PWM output stage, enabling high-definition audio with an 80kHz bandwidth. It delivers up to 80W per channel at 4Ω (25V) or 50W per channel at 2Ω (14.4V). Integrated diagnostics include Digital Impedance Metering (DIM), real-time load current monitoring, and ASIL-compliant safety features.

Feature Summary

• Integrates a 24-bit, 120dB DAC and supports I2S/TDM digital inputs for direct digital audio processing without external converters.
• Features a 2MHz switching frequency that reduces external LC filter size while supporting high-definition audio bandwidths up to 80kHz.
• Includes comprehensive in-play diagnostics such as Digital Impedance Metering (DIM), real-time load current monitoring, and thermal protection.
• Designed for automotive robustness with full ASIL-compliant safety features suitable for critical applications like AVAS.

Applications

• Acoustic Vehicle Alerting Systems (AVAS)
• Car infotainment head units
• Smart cockpit sound systems
• Telematics audio and eCall modules

Procurement Notes

Verify the specific suffix 'L-VYT' against official STMicroelectronics documentation to confirm package type, tape-and-reel specifications, and regional compliance certifications. Ensure the ordering code matches the exact pinout and thermal requirements for your target PCB design. Cross-reference the datasheet revision date to confirm feature availability and diagnostic capabilities.

Selection Notes

Select this component when designing compact automotive audio systems requiring high-fidelity digital input without external DACs. It is suitable for applications needing wide bandwidth (up to 80kHz) and low output noise. Consider its integrated DIM and current monitoring for advanced speaker health diagnostics. Ensure the power supply voltage range (4.5V to 25V) aligns with the vehicle's electrical architecture.

Part Context

This part belongs to the HFDA80x family of high-frequency Class-D amplifiers from STMicroelectronics. These devices are optimized for automotive use, combining high efficiency (>90%) with advanced digital features. The family eliminates the need for external analog components, reducing board space and cost while improving immunity to RF interference common in modern vehicles.

Replacement Considerations

For equivalent performance, consider the HFDA801A which shares similar core specifications including 2MHz switching and 4-channel output. Verify if the specific suffix differences affect packaging or minor electrical tolerances before substitution.