HFDA801A-VYT

Overview

The HFDA801A-VYT is a four-channel Class-D digital input automotive power amplifier manufactured by STMicroelectronics. It operates within a supply voltage range of 4.5V to 25V and utilizes a 64-LQFP-EP (10x10) surface-mount package with an exposed pad. The device delivers up to 80W per channel into a 4-ohm load at 25V, or 50W per channel into a 2-ohm load at 14.4V. It features a 2MHz PWM switching frequency, integrated 24-bit 120dB DAC, and supports I2S/TDM digital inputs. The component is qualified under AEC-Q100 standards and functions reliably across a temperature range of -40°C to 105°C.

Feature Summary

• Integrates a high-resolution 24-bit, 120dB DAC and supports wide bandwidth audio applications up to 80kHz for high-definition sound reproduction.
• Includes comprehensive I2C-configurable diagnostics such as thermal warnings, average junction temperature measurement, and real-time load current monitoring.
• Features internal voltage generation eliminating the need for external power converters, allowing direct connection to automotive battery supplies.
• Supports low-impedance loads down to 2 ohms with output channel paralleling capabilities for enhanced power delivery.

Applications

• Acoustic Vehicle Alert Systems (AVAS) requiring ASIL compliance
• High-fidelity automotive infotainment systems
• Multi-channel surround sound architectures in vehicles

Procurement Notes

Verify the specific suffix VYT corresponds to the required tape and reel packaging configuration before ordering. Confirm that the 64-LQFP-EP footprint matches the PCB layout guidelines provided in the official datasheet. Ensure design compatibility with the 4.5V to 25V operating voltage range and validate thermal management strategies for the exposed pad structure under maximum load conditions.

Selection Notes

Select this component when a compact, cost-effective solution for high-power multi-channel audio is required. It is suitable for designs needing integrated digital-to-analog conversion and advanced diagnostic features without external support circuitry. Consider the 2MHz switching frequency for reduced passive component size compared to lower-frequency alternatives.

Part Context

This part belongs to the HFDA801 family of automotive audio amplifiers from STMicroelectronics. It is designed using BCD technology to optimize performance for space-constrained vehicle environments. The device integrates digital interfaces and power stages into a single package to simplify system architecture and reduce bill of materials costs.

Replacement Considerations

The FDA801-VYT is a related variant within the same product family offering similar functionality but potentially different power ratings or packaging options. Verify electrical specifications and pinout compatibility before substituting.