MP7742DF-LF-Z

Overview

The MP7742DF-LF-Z is a stereo Class-D audio amplifier manufactured by Monolithic Power Systems. It delivers 2 x 15W output power into a 4Ω load at a 24V supply voltage, with efficiency reaching up to 90% under these conditions. The device operates on a single power supply within an input range of 9.5V to 28V. Key electrical specifications include a total harmonic distortion plus noise (THD+N) of 0.018% at 1W output in an 8Ω configuration and a typical noise level of 103μV. It utilizes a proprietary frequency modulation topology for high fidelity.

Feature Summary

• Integrates 250mΩ power MOSFETs to minimize external component count and solution size
• Features built-in circuitry to eliminate pop-and-click noises during startup and shutdown
• Incorporates comprehensive protection mechanisms including over-temperature and short-circuit safeguards

Applications

• High-fidelity stereo audio systems requiring efficient amplification
• Portable audio devices powered by single-supply configurations
• Consumer electronics utilizing compact TSSOP20 form factors

Procurement Notes

Verify the specific suffix 'LF-Z' against the manufacturer's current datasheet to confirm lead-free status and tape-and-reel packaging details. Confirm that the NRND status does not impact immediate procurement needs or long-term availability requirements for your production timeline.

Selection Notes

Select this component when a stereo D-class amplifier with integrated power FETs is required for space-constrained designs. Ensure the application supports the specified 9.5V to 28V single-supply input range and requires the specific pinout compatibility with the MP7722 series.

Part Context

This part belongs to the MPS full-integrated audio amplifier series, designed to reduce overall system footprint by combining control logic and power stages. It shares design lineage with other high-efficiency D-class amplifiers from the manufacturer, focusing on linear performance comparable to Class-AB while maintaining switching efficiency.

Replacement Considerations

MP7745 is identified as the recommended alternative for new designs.