MP7748DF-LF-Z

Overview

The MP7748DF-LF-Z is a Class D audio amplifier manufactured by Monolithic Power Systems. It supports stereo single-ended or mono bridge-tied load configurations. The device integrates 250mΩ power MOSFETs and operates on a single supply voltage ranging from 9.5V to 36V. In stereo mode with a 4Ω load, it delivers 20W per channel at 24V VDD. In mono BTL mode with a 6Ω load, it provides 50W output. Key electrical characteristics include a maximum switching frequency of 1MHz, 103μV input noise in single-ended configuration, and 0.02% THD+N at 1W into 8Ω.

Feature Summary

• Integrates power MOSFETs and pop-and-click suppression circuitry for startup and shutdown events
• Features programmable undervoltage lockout via UVP node control
• Includes integrated thermal protection and short-circuit protection circuits

Applications

• Driving stereo speakers in single-ended output configurations
• Driving mono speakers in bridge-tied load configurations
• Single-supply audio systems requiring high efficiency and fidelity

Procurement Notes

Verify component authenticity through authorized distribution channels. Confirm package integrity upon receipt as the device utilizes an exposed pad TSSOP-28 package. Ensure compatibility with system voltage requirements within the specified 9.5V to 36V operating range before integration.

Selection Notes

Select this component for designs requiring integrated power stages without external MOSFETs. Consider the TSSOP-28 package constraints for thermal management. Evaluate the need for programmable UVLO if specific power sequencing is required. Verify that the target application fits within the supported load impedances for the desired power output levels.

Part Context

This part belongs to the MP7748 family of fully integrated Class D audio amplifiers. The series is characterized by proprietary variable frequency topology designed to offer high linearity and fast response times comparable to Class AB amplifiers while maintaining high efficiency. The family targets compact audio solutions by minimizing external component count.

Replacement Considerations

MP7748SGF-Z: Alternative package variant offering identical functional specifications in a 28-TSSOP-EP package.