TDA8567Q/N3C,112

Overview

The TDA8567Q/N3C,112 is a Class-B quad car radio power amplifier in a DBS23P (SOT411-1) package. It provides four BTL amplifiers with a fixed gain of 26 dB and delivers 25 W per channel into a 4 Ω load at THD=10%. Operating voltage ranges from 6 V to 18 V, with a typical quiescent current of 230 mA. The device includes diagnostic outputs for distortion, short-circuit, and temperature warnings.

Feature Summary

• Integrated dynamic distortion detector, short-circuit protection, and thermal pre-warning via a single open-collector output pin.
• Mode select switch enables operating, mute, and standby states to minimize power consumption and prevent switch-on plops.
• Robust automotive protection features including load dump tolerance up to 45 V, reverse polarity safety, and electrostatic discharge protection.

Applications

• Car radio power amplification
• Automotive audio systems

Procurement Notes

Verify the specific ordering suffix N3C against manufacturer documentation to confirm lead-free status and RoHS compliance. Confirm that the DBS23P through-hole package matches the target PCB footprint. Ensure the fixed 26 dB gain aligns with system requirements, as it differs from similar models like the TDA8568Q.

Selection Notes

Select this component for applications requiring four independent bridge-tied-load channels in a single package. The fixed 26 dB gain simplifies external resistor networks but limits flexibility compared to adjustable gain variants. Consider the thermal resistance of 1 K/W junction-to-case when designing heatsinking solutions for high-power operation.

Part Context

This part belongs to the Philips Semiconductors (now NXP) TDA856x series of automotive power amplifiers. It shares pin compatibility with the TDA8568Q, differing primarily in internal gain configuration. The device represents a legacy solution for multi-channel car audio systems before the widespread adoption of Class-D technology.

Replacement Considerations

The TDA8568Q is pin-compatible but features different gain characteristics. Verify if the fixed 26 dB gain of the TDA8567Q meets the specific input sensitivity requirements of the host system before substituting.