TDA8567Q/N3S,112

Overview

The TDA8567Q is a class-B quad bridge-tied load (BTL) power amplifier designed for automotive audio systems. It integrates four amplifiers with a fixed closed-loop voltage gain of 26 dB, delivering up to 4 × 25 W into 4 Ω loads at 10% THD. The device operates on a supply voltage ranging from 6 V to 18 V, with a typical quiescent current of 230 mA and standby current below 100 μA. Key electrical parameters include a maximum repetitive peak output current of 7.5 A, an input impedance of 30 kΩ, and a supply voltage ripple rejection of 60 dB. The DC output offset voltage is limited to 150 mV.

Feature Summary

• Integrated dynamic distortion detector provides diagnostic feedback via an open-collector pin when clipping occurs.
• Comprehensive protection mechanisms including short-circuit safety to ground, supply voltage, and across the load, along with thermal shutdown.
• Flexible mode select switch enables distinct operating, mute, and low-power standby states without audible switching noise.
• Requires minimal external components due to internally fixed gain and absence of bootstrap capacitors.

Applications

• Car radio power amplification
• Automotive audio system integration

Procurement Notes

Verify component authenticity through authorized NXP or Philips Semiconductor distributors. Confirm package integrity for the DBS23P SIL variant. Ensure compliance with specified absolute maximum ratings during handling. Check datasheet revisions for any updates to limiting values or application circuits before finalizing procurement specifications.

Selection Notes

Select this component for applications requiring high output power in a compact form factor with minimal external circuitry. The fixed 26 dB gain simplifies design but requires matching input signal levels. Consider the DBS23P package thermal characteristics and ensure adequate PCB layout for heat dissipation. Verify compatibility with vehicle electrical systems regarding supply voltage ranges and load dump conditions.

Part Context

The TDA8567Q belongs to a family of BTL car radio amplifiers. It shares pin compatibility with the TDA8568Q, differing primarily in gain configuration. This series utilizes robust output stages suitable for automotive environments, offering high reliability against common electrical faults such as reverse polarity and short circuits.

Replacement Considerations

The TDA8568Q is a pin-compatible alternative within the same product family. Designers must account for potential differences in gain settings when substituting parts. Verify that all electrical parameters and protection features align with the original design requirements before implementation.