MP3389EF-LF-Z

Overview

The MP3389EF-LF-Z is a high-voltage boost controller designed for driving white LED arrays in large LCD panel backlights. It features twelve internal current sources with a 2.5% matching accuracy across strings. The device operates within an input voltage range of 5V to 28V, supporting up to 60mA per string. It utilizes a fixed-frequency architecture with adjustable switching frequency and supports PWM dimming via external signals or internal generation.

Feature Summary

• Integrates twelve independent current sources for balanced LED string regulation
• Supports PWM dimming through external inputs or internally generated signals
• Includes comprehensive protection mechanisms such as open LED detection and overvoltage limits

Applications

• Large LCD panel backlighting systems
• White LED array drivers
• High-voltage boost converter circuits

Procurement Notes

Verify the specific suffix against official Monolithic Power Systems documentation to confirm package type and environmental compliance. Confirm availability status as distribution channels may list obsolete or limited stock items. Ensure the ordering part number matches the required TSSOP-28 configuration and lead time requirements before finalizing procurement plans.

Selection Notes

Select this component when designing systems requiring precise current balancing across multiple LED strings without external matching resistors. It is suitable for applications needing high efficiency due to low feedback voltage. Consider the thermal performance in the TSSOP-28 package when determining heat dissipation strategies for continuous operation at maximum load currents.

Part Context

This part belongs to the MP3389 series of LED lighting driver ICs from Monolithic Power Systems. It is specifically engineered for high-channel-count applications where uniform brightness is critical. The device replaces discrete solutions by integrating control logic and current regulation into a single compact semiconductor package.

Replacement Considerations

MP3389EF-LF-P offers the same functional specifications but utilizes a SOIC-28 package instead of TSSOP-28. Verify pinout compatibility and thermal pad requirements when substituting between these package variants.