MP3389EY-LF

Overview

The MP3389EY-LF is a high-voltage boost controller designed for driving white LED arrays in large LCD panel backlights. It features 12 internal current sources with 2.5% matching accuracy and supports input voltages from 5V to 28V, boosting up to 28V. The device operates at a fixed frequency of 590 kHz and utilizes a SOIC-28 package. It includes PWM dimming, open LED protection, and overvoltage protection.

Feature Summary

• Integrates 12 internal current sources for balanced LED string drive
• Supports PWM dimming via external signal or internal generation
• Includes comprehensive protection against open/short circuits and overtemperature

Applications

• Large LCD panel backlighting systems
• White LED array drivers
• High-voltage LED lighting controllers

Procurement Notes

Verify the specific suffix (LF) for lead-free compliance and package type (SOIC-28). Confirm availability status as distribution channels may list this component as discontinued or limited stock. Ensure the design accounts for the required external MOSFET and passive components specified in the official datasheet.

Selection Notes

Select this component for applications requiring precise current balancing across multiple LED strings without individual feedback loops. The fixed frequency operation simplifies EMI filter design. Consider thermal performance in the SOIC-28 package when designing for maximum current loads.

Part Context

Part of the MP3389 series from Monolithic Power Systems, specialized for high-channel count LED drivers. It complements lower channel variants like the MP3393 by offering higher density for larger display panels.

Replacement Considerations

MP3389EF-LF offers identical functionality in a TSSOP-28 package. Verify pin compatibility and thermal dissipation requirements before substituting between SOIC and TSSOP footprints.