TDA7052AT/N2,112

Overview

The TDA7052AT/N2,112 is a mono bridge-tied load (BTL) audio amplifier integrated circuit manufactured by NXP USA Inc. It features an internal DC volume control stage, eliminating the need for external coupling capacitors while maintaining low offset voltage. The device operates on a single supply voltage ranging from 4.5 V to 18 V. It delivers up to 0.55 W of output power into a 16-ohm load at 6 V supply. Key protection mechanisms include thermal shutdown and short-circuit proofing against ground, supply, and load conditions.

Feature Summary

• Integrated DC volume control stage with logarithmic characteristic
• Bridge-tied load (BTL) output architecture for increased power efficiency
• Built-in missing current limiter (MCL) protection circuit
• Thermal protection and short-circuit proof design

Applications

• Television and monitor audio systems
• Battery-fed portable recorders
• Portable radio receivers
• Headphone amplifier circuits with single-ended configuration

Procurement Notes

Verify component authenticity through authorized NXP distributors or certified suppliers. Confirm package type matches application requirements, as the AT variant uses a mini-pack plastic package distinct from the standard DIP version. Check manufacturing date codes and storage conditions to ensure device integrity prior to assembly.

Selection Notes

Select the TDA7052AT for surface-mount applications requiring compact footprint and minimal external components. Choose this part when a fixed gain of approximately 35.5 dB is acceptable and DC volume control is preferred over AC coupling. Ensure the load impedance and supply voltage align with the specific power output requirements of the target design.

Part Context

This component belongs to the TDA7052A/AT family of mono BTL audio amplifiers originally developed by Philips Semiconductors. The series is designed for cost-sensitive consumer electronics where low quiescent current and reduced electromagnetic interference are critical. It serves as a specialized solution for battery-operated devices requiring efficient audio amplification.

Replacement Considerations

Official substitute part numbers must be confirmed via NXP documentation. Direct replacements within the same family may include the TDA7052A in DIP packaging if through-hole mounting is required. Verify pin compatibility and thermal characteristics before substituting.

FAQ

How does the Missing Current Limiter (MCL) function?

The MCL circuit activates when the current difference between the output terminals exceeds 100 mA typically 300 mA, providing protection suitable for headphone applications.

What is the mute mode threshold?

The device switches to mute mode when the DC volume control voltage falls below 0.3 V, effectively silencing the output.