MP3399EY-LF-P

Overview

The MP3399EY-LF-P is a Monolithic Power Systems LED lighting driver IC designed for high-voltage white LED applications. It utilizes a boost topology to drive up to 24 strings of LEDs, featuring cascading control to extend channel count. The device operates with an input voltage range of 5 V to 28 V and supports a maximum output voltage of 50 V. Key electrical parameters include a switching frequency of 570 kHz and a power dissipation rating of 3.9 W. It is housed in a TSSOP-28 package and functions within a temperature range of -40°C to +125°C.

Feature Summary

• Cascading architecture enables the control of extended LED channel counts beyond standard single-chip limits
• Integrated boost controller manages high-voltage outputs suitable for multi-string white LED arrays
• Supports PWM dimming for precise brightness control and light management

Applications

• LCD panel backlighting for monitors and televisions
• High-density white LED array illumination systems
• Industrial display backlighting requiring high voltage compliance

Procurement Notes

Verify the specific suffix 'EY' against the manufacturer's current datasheet to confirm pinout and functional compatibility, as suffixes often denote package variations or revision changes. Ensure the ordering quantity aligns with the manufacturer's reel specifications. Confirm RoHS compliance status directly with the supplier documentation prior to integration into production designs.

Selection Notes

Select this component when designing circuits requiring more than 12 LED strings, leveraging its cascading capability. The 50 V output limit dictates suitability for specific series-parallel LED configurations. Consider the thermal performance associated with the 3.9 W dissipation rating and the TSSOP-28 package footprint during PCB layout. Verify that the system input voltage remains within the 5 V to 28 V operational window.

Part Context

This part belongs to the MP3399 series of monolithic LED drivers from Monolithic Power Systems. It is functionally related to variants such as the MP3399EF, which may differ in package type or specific evaluation board support. The series targets professional display backlighting markets where high string counts and reliable boost regulation are required.

Replacement Considerations

Publicly confirmed direct substitute part numbers for MP3399EY-LF-P are not available in the provided source data. Designers should consult official MPS documentation for recommended alternatives or cross-reference compatible devices within the same product family.