TDA7056AT/N2,518

Overview

The TDA7056AT/N2,518 is a mono Bridge-Tied Load (BTL) audio amplifier manufactured by NXP Semiconductors. It integrates DC volume control and operates within a supply voltage range of 4.5 to 18 V. The device delivers up to 3 W of output power into a 16 Ω load at 12 V. Key electrical parameters include a maximum total voltage gain of 35.5 dB, a quiescent current of 8 mA typical, and a thermal resistance from junction to ambient of 60 K/W in free air. It utilizes an SO20 plastic small outline package.

Feature Summary

• Integrated DC volume control stage eliminates the need for external coupling capacitors.
• Built-in Missing Current Limiter (MCL) supports Single-Ended headphone applications.
• Short-circuit proof design with thermal protection circuitry prevents damage during faults.
• Optimized for low HF radiation and minimal switch-on or switch-off clicks.

Applications

• Television sets and monitor audio systems.
• Battery-fed portable recorders.
• Portable radio receivers.
• Single-ended headphone driver circuits.

Procurement Notes

Verify component authenticity through official NXP channels or authorized distributors. Confirm the specific ordering suffix matches the required RoHS compliance status and material declaration. Review the latest product specification document for any updates regarding manufacturing status or lead times before finalizing procurement plans.

Selection Notes

Select this amplifier for designs requiring integrated volume control without external coupling capacitors. Ensure the application board layout separates input and power grounds to prevent instability. Verify that the thermal resistance requirements are met by the PCB copper area, as performance depends on heat dissipation capabilities.

Part Context

This component belongs to the TDA7056 series of BTL audio amplifiers produced by NXP Semiconductors. It is designed for consumer electronics where space efficiency and low component count are critical. The series offers various power outputs and packaging options to suit different audio system architectures.

Replacement Considerations

Consult official NXP documentation for confirmed substitute part numbers. Direct replacements must match the SO20 package and BTL functionality. Verify compatibility with existing thermal and electrical constraints before substitution.

FAQ

How does the MCL circuit function in single-ended applications?

The Missing Current Limiter activates when the current difference between output terminals exceeds 100 mA, allowing safe operation for single-ended headphone loads while protecting the amplifier.

What is the effect of the DC volume control voltage on mute mode?

If the DC volume control voltage falls below 0.3 V, the device automatically switches to mute mode, reducing the output voltage significantly.