TDA1562Q/N3,112

Overview

The TDA1562Q is a monolithic integrated 70 W/4 Ω Bridge-Tied Load (BTL) class-H high efficiency power amplifier housed in a DBS17P plastic DIL-bent-SIL package. Operating from a single supply voltage of 8 V to 18 V, it delivers up to 70 W output power at 10% THD and 55 W at 0.5% THD into a 4 Ω load. The device features a fixed voltage gain of 26 dB, differential inputs with high common mode rejection, and a diagnostic pin providing status on dynamic distortion, short circuits, open loads, and temperature protection.

Feature Summary

• Class-H architecture utilizing lift-supply capacitors to boost internal supply voltage for high output power while maintaining low power dissipation during typical music signals.
• Integrated diagnostic interface reporting dynamic distortion detector activation, output short-circuits, open load conditions, and thermal protection thresholds.
• Flexible control modes via Mode select and Status I/O pins enabling standby, mute, fast mute, and selectable Class-B or Class-H operation.
• Comprehensive protection mechanisms including load dump protection, short-circuit safety to ground/supply/load, and electrostatic discharge protection.

Applications

• Car audio systems such as car radios and amplifiers
• Mains fed audio combinations including midi and mini systems
• Television sound output stages

Procurement Notes

Verify the specific ordering suffix and package variant against current NXP documentation, as historical Philips Semiconductors data sheets may reflect superseded specifications. Confirm component availability and lifecycle status through authorized distributors, as this part number originates from legacy product lines. Ensure design compatibility with the DBS17P package dimensions and thermal requirements specified in the official datasheet.

Selection Notes

Select this amplifier for applications requiring high efficiency and significant output power from a single low supply voltage. The class-H operation reduces heat dissipation compared to standard class-B designs, simplifying heatsink requirements for music signals. Consider the diagnostic capabilities for system monitoring and the flexible control inputs for integration with vehicle or consumer audio management systems.

Part Context

The TDA1562Q belongs to the TDA1562 family of high-efficiency power amplifiers, which also includes variants like the TDA1562ST and TDA1562SD. These devices share the same core functionality but differ in package styles, such as the rectangular-DIL-bent-SIL options. The family is designed for robust performance in automotive and consumer audio environments.

Replacement Considerations

Direct replacements are not explicitly listed in the provided source material. Designers should evaluate other NXP BTL amplifier families or consult the manufacturer for updated components replacing discontinued Philips Semiconductors parts.

FAQ

How does the TDA1562Q achieve high efficiency?

It operates as a class-H amplifier by lifting the internal supply voltage using external electrolytic capacitors when higher output power is needed, reducing dissipation by approximately 50% compared to class-B for music signals.

What information does the DIAG pin provide?

The open-collector DIAG pin indicates dynamic distortion (clipping), short-circuit conditions at the outputs, presence of an open load, and activation of temperature protection.