MP4688DN-LF-P

Overview

The MP4688DN-LF-P is a high-voltage input buck switching regulator designed for driving high-power LEDs. It integrates an upper power MOSFET with a typical current limit of 3.2A and supports an input voltage range from 4.5V to 80V. The device utilizes hysteresis current mode control to achieve fast response without external compensation, enabling dimming frequencies up to 20kHz. It offers LED current accuracy of ±5% and operates at switching frequencies up to 2MHz. Key protection features include over-temperature shutdown, short-circuit protection, and optional output voltage limiting.

Feature Summary

• Hysteresis current mode control provides ultra-fast response and eliminates the need for external compensation components.
• Integrated upper power MOSFET with short-circuit protection simplifies design and reduces component count.
• Wide operating input voltage range accommodates various automotive, industrial, and general lighting applications.
• Dedicated PWM dimming control input enables precise brightness adjustment.

Applications

• High-power LED lighting systems
• Automotive illumination circuits
• Industrial lighting fixtures
• General lighting applications

Procurement Notes

Verify the specific suffix 'P' against official Monolithic Power Systems documentation to confirm packaging details, as datasheets may list 'Z' or other variants. Ensure compatibility with required thermal management solutions given the SOIC-EP package. Confirm RoHS compliance status through the manufacturer's latest environmental reports before finalizing procurement specifications.

Selection Notes

Select this component when a wide input voltage range up to 80V is required for LED driving applications. The integrated MOSFET and hysteresis control architecture are suitable for designs prioritizing minimal external component count and fast transient response. Consider the SOIC-EP-8 package for thermal performance requirements in space-constrained layouts.

Part Context

This part belongs to the MP4688 series of high-voltage buck converters manufactured by Monolithic Power Systems. It is specifically engineered for LED driver applications requiring robust performance under varying input conditions. The series emphasizes reliability through integrated protections and efficient power conversion capabilities.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material. Consult official MPS documentation for potential cross-references or updated product line replacements.