TDA8541T/N1,112

Overview

The TDA8541T/N1,112 is a single-channel Bridge-Tied Load (BTL) audio power amplifier manufactured by NXP Semiconductors. It delivers 1 W output power into an 8 Ω load at a 5 V supply with 10% THD. The device operates on a supply voltage range of 2.2 V to 18 V and features low quiescent current of 81 mA typical. It includes standby and mute logic controlled by CMOS-compatible levels, ensuring low standby current of 10 μA maximum. The amplifier provides high supply voltage ripple rejection and protects against short circuits and thermal overload.

Feature Summary

• Bridge-Tied Load architecture with complementary PNP-NPN output stage
• Integrated standby and mute control logic for noise suppression
• Built-in protection against short circuits and thermal overload
• High supply voltage ripple rejection capability

Applications

• Portable consumer products
• Personal computers
• Telephony systems

Procurement Notes

Verify the specific ordering suffix and package variant during procurement, as the TDA8541 series includes both DIP and SO packages. Confirm availability status directly with NXP Semiconductors or authorized distributors, as product lifecycles may change. Ensure design compatibility with the required supply voltage and load impedance specifications before finalizing orders.

Selection Notes

Select this component for applications requiring a simple, low-component-count mono BTL amplifier. It is suitable for designs needing integrated mute functionality to prevent switch-on pops. Consider the thermal resistance characteristics when designing heat dissipation strategies, especially in enclosed spaces. Verify that the gain setting resistors align with the desired closed-loop voltage gain range.

Part Context

This part belongs to the TDA8541 family of audio amplifiers from NXP Semiconductors. The 'T' designation indicates the SO8 plastic small outline package version, while the base model TDA8541 refers to the DIP8 dual in-line package. Both variants share identical electrical characteristics and functional descriptions as defined in the official product specification.

Replacement Considerations

No official replacement parts are listed in the provided datasheet. Designers should evaluate alternative mono BTL audio amplifiers from NXP or other manufacturers if this obsolete component is no longer available. Ensure any substitute matches the supply voltage range, output power capabilities, and package footprint requirements.

FAQ

How is the amplifier gain configured?

The closed-loop voltage gain can be set within a range from 6 dB to 30 dB using external feedback resistors connected to the input pins.

What determines the operating mode of the device?

The MODE pin controls the operating state. A voltage below 0.5 V enables operation, between 1.5 V and VCC-1.5 V activates mute, and voltages near VCC engage standby mode.

Is the TDA8541 protected against output short circuits?

Yes, the outputs are short-circuit safe to ground, VCC, and across the load, providing robust protection during fault conditions.