TDA7052A/N2,112

Overview

The TDA7052A/N2,112 is a mono bridge-tied load (BTL) audio amplifier manufactured by NXP USA Inc. It features an integrated DC volume control stage and operates on a single supply voltage ranging from 4.5 V to 18 V. The device delivers up to 1.1 W of output power into an 8 Ω load at 6 V supply. Key electrical characteristics include a maximum voltage gain of 36.5 dB, a gain control range of 80 dB, and a total quiescent current of 2 mA. It utilizes an 8-pin dual in-line plastic package.

Feature Summary

• Integrated DC volume control eliminates the need for external coupling capacitors while maintaining low offset voltage.
• Bridge-tied load (BTL) architecture provides higher output power with lower peak supply current compared to conventional stages.
• Built-in protection circuits include thermal shutdown and short-circuit proofing to ground, supply, and across the load.
• Designed to prevent switch-on and switch-off clicks, ensuring quiet operation during power transitions.

Applications

• Audio amplification in television sets and video monitors.
• Battery-powered portable recorders requiring low supply voltage operation.
• Portable radio receivers utilizing minimal external components.
• Headphone amplifier applications supported by missing current limiter functionality.

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current catalog to confirm package type and material code. Ensure compatibility with the required thermal resistance specifications for the intended enclosure design. Confirm that the application circuit adheres to the absolute maximum ratings provided in the official product specification document.

Selection Notes

Select this component for designs requiring a single-supply BTL configuration with precise DC volume control. It is suitable for applications where minimizing external passive components is critical. Consider the thermal dissipation limits when designing for high ambient temperatures or enclosed spaces. Verify that the load impedance matches the specified conditions for optimal power output and distortion performance.

Part Context

This component belongs to the Philips Semiconductors (now NXP) integrated circuit family designed for consumer audio applications. It represents a solution for cost-sensitive designs needing reliable mono amplification. The technology focuses on stability and low electromagnetic interference. It is part of a broader range of audio processing ICs developed for the television and portable electronics markets.

Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers within the same series. Ensure any replacement maintains the BTL output topology and DC volume control interface. Verify pin compatibility and thermal characteristics before implementation.

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, allowing safe operation in headphone applications.

What is the mechanism for mute mode activation?

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

How is thermal protection implemented?

If the crystal temperature rises above +150 °C, the internal circuit reduces the gain to lower the output power and prevent damage.