FDA4100LV-T

Overview

The FDA4100LV-T is a quad bridge Class D audio power amplifier utilizing BCD-SOI technology, designed for automotive radio applications. It integrates a high-performance digital-to-analog converter and MOSFET outputs to achieve high efficiency. The device supports I2S and TDM digital inputs with sampling frequencies of 44.1 kHz, 48 kHz, 96 kHz, and 192 kHz. It features a built-in step-up driver allowing operation from 6 V to 25 V supply voltages. Maximum output power reaches 4 x 135 W at 4 Ω (25 V, 1 kHz, 10% THD) or 2 x 270 W in bridged mode. It includes an integrated L-C low-pass filter in the feedback loop and offers full I2C configurability and diagnostics.

Feature Summary

• Integrates a high-performance D/A converter with 108 dB dynamic range and powerful MOSFET Class D outputs for superior efficiency.
• Features a unique feedback loop architecture that includes the output L-C low-pass filter, ensuring frequency response linearity independent of external component quality.
• Includes a built-in step-up driver to deliver high output power even at standard 14 V supply, while supporting low voltage operation down to 6 V for start-stop systems.
• Provides comprehensive I2C bus configurability and a full diagnostics array for monitoring individual speaker status and system faults.

Applications

• Standard single DIN car radio head units
• Advanced automotive audio systems requiring high power output
• Vehicles equipped with start-stop engine technology

Procurement Notes

Verify the NRND (Not Recommended for New Designs) status before initiating any new production plans. Confirm that the specific tape-and-reel packaging matches your assembly requirements. Ensure design compatibility with the required I2S/TDM interface protocols and I2C diagnostic commands. Review the latest datasheet for any updates regarding thermal performance or EMI compliance standards.

Selection Notes

Select this component when high channel count and power density are required within a standard automotive form factor. The integrated D/A converter reduces external component count compared to analog input alternatives. The low-voltage capability makes it suitable for modern vehicles with fluctuating supply voltages. Consider the EMI control features if operating in close proximity to FM/AM tuners.

Part Context

This part belongs to STMicroelectronics' FDA series of automotive Class D amplifiers, which utilize BCD-SOI technology. The series is characterized by high efficiency, integrated digital processing, and robust diagnostic capabilities tailored for the automotive environment. The FDA4100LV represents a high-power variant within this family, offering quad-bridge configurations for multi-speaker setups.

Replacement Considerations

Due to the NRND status, evaluate alternative parts from the same FDA family or newer generations. Check for pin-to-pin compatibility if replacing in existing designs. Verify that substitute components meet the same AEC-Q100 qualification and EMI compliance standards (CEI EN 55025).