TDA8931T/N1,112

Overview

The TDA8931T/N1,112 is a Class-D audio power amplifier switching stage manufactured by NXP USA Inc. It features a single-ended power stage with drive logic, protection control, and a differential input comparator. The device supports asymmetrical supply voltages from 12 V to 35 V and symmetrical voltages from ±6 V to ±17.5 V. It delivers up to 22 W output power into a 4 Ω load at 26 V supply. Efficiency reaches 91% at 30 V into 8 Ω. The package is SO20 (SOT163-1).

Feature Summary

• High efficiency operation eliminates the need for external heat sinks.
• Integrated charger for single-ended capacitor ensures plop-noise free startup.
• Comprehensive protection against overtemperature, overcurrent, overvoltage, and undervoltage.

Applications

• Flat panel television sets
• Flat panel monitors
• Multimedia systems
• Wireless speakers

Procurement Notes

Verify the specific ordering suffix 'N1,112' against official documentation, as standard listings often reference 'N1,118'. Confirm component status, as this series may be discontinued or subject to lifecycle changes. Ensure compatibility with required thermal management PCB layouts specified in the datasheet.

Selection Notes

Select based on required supply voltage range and load impedance. Verify that the application utilizes a closed-loop self-oscillating digital amplifier system architecture. Ensure proper thermal via placement near corner leads for adequate heat dissipation within the specified ambient temperature limits.

Part Context

This component belongs to the TDA893 family of high-efficiency Class-D audio amplifiers. It functions as a switching power stage designed for compact mono amplifier systems. The device integrates necessary control logic and protection circuits to simplify system design while maintaining high performance standards.

Replacement Considerations

Check for direct substitutes within the TDA893 family, such as the TDA8932 or TDA8933, ensuring pinout and functional compatibility. Verify if alternative packages like HTSSOP32 are suitable for the existing board layout.

FAQ

How does the TDA8931 prevent pop noise during startup?

The device includes a half-supply voltage capacitor charger (pin HVP) that charges the SE capacitor within 0.5 seconds. This ensures a plop-noise free start-up behavior before the device begins switching.

What is the function of the DIAG pin?

The DIAG pin serves as a diagnostic output. It goes LOW for a minimum of 1.5 μs when any protection circuit (OTP, OCP, OVP, UVP) is triggered, indicating a fault condition.