MP4689DN-LF-Z

Overview

The MP4689DN-LF-Z is a high-voltage input buck switching regulator designed for driving high-power LEDs with up to 1A constant current. It features a wide operating input voltage range from 4.5V to 95V and integrates an upper power MOSFET with a typical limit current of 2.5A. The device utilizes hysteresis current mode control for fast response and supports switching frequencies up to 1MHz. Key electrical parameters include a 200mV reference voltage, 170µA static current, and ±3% LED current accuracy. It operates within a temperature range of -40°C to +125°C and is housed in a SOIC-EP-8 package.

Feature Summary

• Integrates an upper power MOSFET with short-circuit protection
• Hysteresis current mode control eliminates the need for compensation
• Supports PWM dimming with dedicated control input
• Includes over-temperature shutdown and optional output voltage limiting

Applications

• High-power LED lighting systems
• Automotive illumination applications
• Industrial lighting solutions
• General-purpose LED drivers

Procurement Notes

Verify component authenticity through authorized channels due to the NRND status. Confirm that the specific suffix matches the required tape-and-reel packaging configuration. Check for moisture sensitivity handling requirements during storage and assembly. Ensure design compatibility with the discontinued status by evaluating long-term supply availability for production runs.

Selection Notes

Select this component for applications requiring wide input voltage ranges and integrated high-side switching. Consider the 1MHz switching frequency for minimizing external passive component sizes. Evaluate the thermal performance within the SOIC-EP-8 package for heat dissipation needs. Verify that the 1A output current capability aligns with the target LED load requirements.

Part Context

This part belongs to the MP4689 series of high-voltage LED drivers manufactured by Monolithic Power Systems. It is classified as a buck topology driver optimized for high-power LED applications. The series is known for its robust protection features and efficient current regulation capabilities suitable for demanding environments.

Replacement Considerations

Consider the MP4689A as an alternative for new designs. Verify functional compatibility and pinout alignment before substitution. Review updated specifications to ensure performance requirements are met.