MP3389EY-LF-P

Overview

The MP3389EY-LF-P is a 12-channel boost WLED controller designed for large LCD panel backlighting. It operates with an input voltage range of 5V to 28V and utilizes an external MOSFET to drive up to 12 LED strings. The device features a fixed-frequency architecture with adjustable switching frequency via an external resistor. Each channel includes an internal current source, ensuring a current matching accuracy of 2.5% across strings. It supports PWM or DC dimming and incorporates comprehensive protection mechanisms including overvoltage, undervoltage lockout, and thermal shutdown.

Feature Summary

• Integrates twelve internal current sources for precise current balancing across multiple LED strings
• Supports flexible dimming control through external PWM input signals or DC voltage levels
• Includes robust fault protection features such as open LED detection, short circuit prevention, and thermal shutdown

Applications

• Backlight driving for large LCD panels
• White LED array illumination systems
• High-channel-count display backlight controllers

Procurement Notes

Verify the specific suffix EY against official Monolithic Power Systems documentation to confirm pinout and package variations. Confirm RoHS compliance status directly from the manufacturer datasheet. Ensure the design accounts for the required external components, including the power MOSFET and frequency-setting resistors, as specified in the electrical characteristics table.

Selection Notes

Select this component when designing backlights requiring high channel counts with strict current matching requirements. The 2.5% current balance precision makes it suitable for uniform illumination applications. Consider the operating temperature range and the need for external heat dissipation if driving high-current LED arrays. Verify that the input voltage range aligns with the system power supply specifications.

Part Context

This part belongs to the MP3389 series of LED lighting drivers manufactured by Monolithic Power Systems. The series focuses on providing efficient solutions for multi-string white LED applications. The EY suffix typically denotes a specific package variant, often TSSOP-28, within the broader product family designed for display backlighting control.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided reference data. Consult Monolithic Power Systems technical support for direct replacements or cross-reference options based on specific electrical and mechanical constraints.