MP7747DQ-LF-Z

Overview

The MP7747DQ-LF-Z is a Class-D monaural audio amplifier manufactured by Monolithic Power Systems. It delivers 20W of output power into a 4Ω load with a 24V supply voltage. The device integrates 250mΩ power MOSFETs and employs a proprietary variable frequency topology to ensure high fidelity and efficiency comparable to Class-AB amplifiers. Key electrical features include adjustable VDD shutdown voltage via the UVP node, default rise threshold at 8.4V when unconnected, and single-supply operation.

Feature Summary

• Integrates 250mΩ power MOSFETs to minimize solution size
• Eliminates startup and shutdown pop noise artifacts
• Includes built-in short circuit protection circuits
• Supports adjustable VDD shutdown voltage control

Applications

• Driving 4Ω speakers in single-ended output configurations
• High-fidelity audio systems requiring high efficiency
• Single-supply powered audio amplifier designs

Procurement Notes

Verify the specific suffix Z indicates lead-free compliance against official MPS documentation. Confirm the QFN-10 (3x3) package dimensions match your PCB footprint requirements. Ensure the input voltage range supports your system's 24V rail for optimal 20W performance. Check for any specific thermal pad grounding requirements associated with this package type.

Selection Notes

Select this component for applications requiring a compact, single-ended Class-D solution. It is suitable where high efficiency and AB-class sound quality are prioritized. Consider the integrated protection features for robustness. Verify that the 250mΩ internal resistance meets your thermal dissipation constraints under full load conditions.

Part Context

This part belongs to the MP7747 series of fully integrated audio amplifiers from Monolithic Power Systems. The series focuses on reducing external component counts through high integration. The DQ suffix denotes the QFN-10 package variant, distinguishing it from other pinout or thermal options within the same functional family.

Replacement Considerations

MP7747DQ-LF-P is the tape-and-reel version of the same device. Cross-reference with other MP7747 variants if different packaging or termination styles are required, ensuring pin compatibility remains unchanged.