MP7748DF-LF-P

Overview

The MP7748DF-LF-P is a Class-D audio amplifier manufactured by Monolithic Power Systems. It features a single-ended output configuration designed to drive stereo speakers or bridge-tied load (BTL) mono speakers. The device integrates 250mΩ power MOSFETs and operates on a single supply voltage ranging from 9.5V to 36V. Key electrical parameters include an output current of 4.5A, a quiescent supply current of 3mA, and a total harmonic distortion plus noise (THD+N) of 0.02%. It supports a minimum load impedance of 6 Ohms and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates pop-and-click suppression circuitry for startup and shutdown events
• Includes built-in short-circuit protection and thermal shutdown mechanisms
• Features programmable undervoltage lockout (UVP) via the UVP pin
• Utilizes MPS proprietary variable frequency topology for high efficiency and linearity

Applications

• Driving stereo speakers in single-ended configurations
• Powering mono speakers in bridge-tied load (BTL) arrangements
• High-efficiency audio amplification systems requiring low THD+N

Procurement Notes

Verify component authenticity through authorized channels as this part is marked Not Recommended for New Designs (NRND). Confirm package integrity upon receipt due to moisture sensitivity classification. Ensure ordering quantities align with manufacturer reel specifications. Cross-reference datasheet revisions to confirm compatibility with existing designs before procurement.

Selection Notes

Select this component for applications requiring integrated power MOSFETs and single-supply operation between 9.5V and 36V. Consider the TSSOP-F-28 package for surface-mount assembly. Evaluate the 4.5A output current capability against speaker impedance requirements. Verify that the programmable UVP feature meets system power management needs.

Part Context

This device belongs to the MP7748 series of Class-D audio amplifiers from Monolithic Power Systems. It shares architectural similarities with other members like the MP7748SGF-Z but differs in specific packaging and potential output configurations. The series emphasizes compact solutions by integrating power stages and protection circuits into a single monolithic chip.

Replacement Considerations

MP7748SGF-Z is identified as a potential replacement option within the same product family.