TDA8589J/N1,112

Overview

The TDA8589J/N1,112 is an I2C-bus controlled quad audio power amplifier and multiple voltage regulator. It features four amplifiers configured in Bridge Tied Load (BTL) to drive speakers for front and rear left and right channels. The device operates with a battery voltage of up to 16 V for a 2 Ω load and up to 18 V for a 4 Ω load. Maximum output power reaches 46 W at 14.4 V into a 4 Ω load and 69 W at 14.4 V into a 2 Ω load. Total quiescent current is typically 270 mA, dropping to 150 μA in standby mode with only the microcontroller supply active.

Feature Summary

• I2C-bus control for independent configuration and diagnostic reading of each amplifier channel and speaker status.
• Integrated multiple voltage regulators including five outputs and two power switches with loss-of-ground protection.
• Comprehensive protection mechanisms including thermal clipping, short-circuit detection, and low headroom protection.
• DC and AC load detection capabilities to identify open circuits, shorts, and speaker presence during startup.

Applications

• Boost amplifier and voltage regulator for car radios
• Power amplifier and voltage regulator for CD/MD players

Procurement Notes

Verify the specific suffix N1,112 against the manufacturer's ordering information to confirm fixed output voltages for Regulator 2 and Regulator 3. Ensure the package version matches the required lead length and pin configuration for the target PCB layout. Confirm RoHS compliance status if required by the assembly process.

Selection Notes

Select this component when an integrated solution combining high-power BTL amplification with regulated power supplies is required. It is suitable for applications needing I2C-based diagnostics and low quiescent current in standby modes. Consider the 37-lead DBS package constraints and the need for external capacitors for SVR and backup functions during design.

Part Context

This part belongs to the TDA8589 family of I2C-controlled audio power amplifiers produced by Philips Semiconductors, now NXP. It utilizes BCDMOS technology for robust performance. The device integrates complementary DMOS output stages to ensure high power output with minimal distortion, designed specifically for automotive audio environments requiring reliable operation under varying battery conditions.

Replacement Considerations

TDF8554J is identified as a downwards-compatible successor with similar functionality but enhanced stop/start-car preparation features.