TDA8571J/N2S,112

Overview

The TDA8571J is a class-B quad bridge car radio power amplifier in a 23-lead DBS23P package. It delivers 4 × 40 W (EIAJ) into 4 Ω loads with a fixed gain of 34 dB. Operating supply voltage ranges from 6 V to 18 V, with load dump protection up to 45 V. Key electrical parameters include a quiescent current of 200 mA and standby current under 100 μA. The device features an open-collector diagnostic output for distortion, short-circuit, and thermal warnings.

Feature Summary

• Integrated dynamic distortion detector, short-circuit protection, and temperature pre-warning via a single diagnostic pin
• Three-mode operation including low-power standby, mute, and normal operating states controlled by the MODE pin
• Robust automotive protection against reverse polarity, load dumps, and electrostatic discharge

Applications

• Quad bridge car radio power amplification
• Automotive audio systems requiring integrated diagnostics
• High-power vehicle infotainment designs

Procurement Notes

Verify component authenticity through authorized NXP or Philips Semiconductor distributors. Confirm package integrity and lead straightness for the DBS23P SIL format. Ensure design compliance with absolute maximum ratings, particularly regarding load dump voltage limits and thermal dissipation requirements for reliable automotive operation.

Selection Notes

Select this amplifier for applications requiring high output power with minimal external components. The fixed 34 dB gain simplifies circuit design compared to adjustable variants. Consider the specific thermal resistance characteristics and PCB layout guidelines to ensure adequate heat dissipation and signal isolation during high-power operation.

Part Context

This component belongs to the TDA85xx series of automotive power amplifiers designed for high-performance audio applications. It utilizes a plastic DIL-bent-SIL power package suitable for wave soldering. The device represents a solution for integrating multiple amplifier channels with comprehensive fault detection capabilities within a compact form factor.

Replacement Considerations

The datasheet notes pin compatibility with the TDA8568Q, except for gain configuration. Verify functional equivalence and gain specifications before substitution. No other direct substitute part numbers are explicitly confirmed in the provided documentation.