TDA7575

Overview

The TDA7575 is a dual-bridge Class AB audio amplifier utilizing MultiPower BCD technology and a DMOS output stage, designed for automotive radio applications. It operates on a single supply voltage ranging from 8 V to 18 V. The device delivers up to 2x75 W into 2 Ω loads or 1x150 W in single-channel mode with 1 Ω capability. Key electrical parameters include a typical gain of 26 dB (selectable to 12 dB), total harmonic distortion plus noise of 0.02% at 150 W/1 Ω, and an input offset voltage of ±100 mV. It features differential inputs, I²C bus control, and comprehensive digital diagnostics.

Feature Summary

• Integrated full diagnostic array communicating speaker status via the I²C bus
• Single-channel 1 Ω driving capability by paralleling outputs
• High-efficiency performance reducing thermal dissipation compared to conventional Class AB solutions
• Full fault protection including DC offset detection and independent short circuit protections

Applications

• Automotive car radio power amplification
• High-power audio sets requiring simplified thermal management
• Systems requiring integrated digital load diagnostics

Procurement Notes

Verify package type availability as the component is offered in PowerSO36 and Flexiwatt27 configurations. Confirm I²C interface requirements against system microcontroller capabilities. Ensure supply voltage ranges align with automotive electrical standards. Check for specific ordering suffixes that may indicate packaging variations or updated revisions.

Selection Notes

Select this amplifier for applications demanding high output power with low distortion in a compact form factor. Consider the I²C diagnostic feature if system monitoring is required. Evaluate thermal design needs based on the reduced dissipation characteristics in average listening conditions. Ensure compatibility with differential input signals and available gain settings.

Part Context

The TDA7575 belongs to STMicroelectronics' dedicated automotive audio amplifier portfolio. It leverages MultiPower BCD technology to achieve superior efficiency and low distortion. The device is specifically engineered to simplify thermal management in high-power car radio systems while providing robust diagnostic capabilities through its integrated digital interface.

Replacement Considerations

TDA7575PD is the specific ordering number for the PowerSO36 package variant.