TDA8542AT/N1,518

Overview

The TDA8542AT is a two-channel audio power amplifier delivering 2 × 1.5 W output power to an 8 Ω load at a 6 V supply. It features Bridge-Tied Load (BTL) amplifiers with a complementary PNP-NPN output stage and standby/mute logic. The device operates within a supply voltage range of 2.2 V to 18 V, with a typical quiescent current of 15 mA and a standby current of 10 μA. Total harmonic distortion is typically 0.15% at 0.5 W output. Supply voltage ripple rejection is specified at 50 dB.

Feature Summary

• Bridge-Tied Load architecture with complementary PNP-NPN output stage
• CMOS compatible standby and mute control logic
• Integrated thermal shutdown protection mechanism
• Output short-circuit safe to ground, VCC, and across the load

Applications

• Portable consumer products
• Personal computers
• Motor-driver (servo)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm package type and environmental compliance status. Confirm that the component meets the required RoHS directives for the intended market. Ensure the supplier provides valid traceability data consistent with the original Philips Semiconductors specifications.

Selection Notes

Select this component for applications requiring low saturation voltage in the output stage. The gain can be adjusted between 6 dB and 30 dB using external feedback resistors. Consider the SO20 package dimensions and thermal resistance characteristics when designing the printed circuit board layout for adequate heat dissipation.

Part Context

This integrated circuit belongs to the TDA854x series of audio amplifiers manufactured by NXP USA Inc. (formerly Philips Semiconductors). It is designed as a compact solution for stereo audio amplification in battery-powered devices. The datasheet supersedes the specification dated November 14, 1997.

Replacement Considerations

TDA8542TSDK-T

FAQ

How is the operating mode controlled?

The MODE pin controls the operating state: voltages below 0.5 V enable operation, levels between 1.5 V and VCC-1.5 V activate mute, and voltages above VCC-0.5 V engage standby.

Can the amplifier drive headphones directly?

Yes, in Single-Ended mode, headphones can be connected using coupling capacitors or directly if the common ground is biased to half the supply voltage.