TDA8560Q/N1,112

Overview

The TDA8560Q/N1,112 is a Class-B stereo BTL car radio power amplifier by NXP USA Inc. It delivers 40 W into 2 Ω and 25 W into 4 Ω loads at 14.4 V with 10% THD. Operating supply voltage ranges from 6.0 V to 18 V. The device features a fixed closed-loop gain of 40 dB, input impedance of 30 kΩ, and quiescent current of 115 mA. It includes diagnostic outputs for distortion, short-circuit, and thermal detection, alongside mute and standby modes.

Feature Summary

• Integrated dynamic distortion detector (DDD) that activates upon clipping onset to limit signal distortion.
• Comprehensive protection mechanisms including load dump, reverse polarity, and short-circuit safety to ground, supply, and across the load.
• Thermal shutdown triggered when virtual junction temperature reaches 150 °C.
• Mode select switch enabling operating, mute, and standby states with low standby current consumption.

Applications

• Car radio power amplification
• Stereo bridge-tied load (BTL) audio systems

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against DBS13P specifications. Check datasheet revision status as this specification supersedes March 1994 data. Ensure environmental compliance documentation matches project requirements.

Selection Notes

Select this component for applications requiring high output power in automotive environments. Consider the fixed 40 dB gain and single-ended inputs for system design. Evaluate thermal management needs due to the 1.3 K/W junction-to-case resistance. Verify compatibility with 12 V automotive electrical systems within the specified voltage range.

Part Context

This integrated circuit belongs to the TDA856x series of automotive audio amplifiers. It utilizes a 13-lead plastic DIL-bent-SIL power package (DBS13P). The device is designed specifically for integration into vehicle infotainment systems, providing robust performance under varying automotive electrical conditions.

Replacement Considerations

Consult official NXP documentation for verified substitute part numbers. Cross-reference pinouts and electrical characteristics before implementation.

FAQ

How does the diagnostic output function during a short-circuit?

During a short-circuit to ground or supply, the output stages switch off, and the diagnostic pin remains continuously low. For cross-load shorts, it pulses low for 20 ms and high for 50 μs.

What is the purpose of the mode select switch?

The mode select switch controls the amplifier state between operating, mute, and standby. It allows for low-power standby operation and prevents switch-on plops when managed correctly.