MP3394EF-LF-Z

Overview

The MP3394EF-LF-Z is a four-channel boost WLED controller from Monolithic Power Systems, designed for LCD panel backlighting. It operates within a 5V to 28V input voltage range and delivers up to 200mA per channel. The device utilizes a fixed-frequency current control architecture with an adjustable switching frequency of 540kHz. It features a TSSOP-EP-16 package and supports PWM or DC dimming. Key electrical parameters include a 2.5% current matching accuracy between strings and a low average feedback voltage of 350mV.

Feature Summary

• Four integrated internal current sources ensure precise current balancing across LED strings
• Supports cascading multiple units under a single power supply to expand channel count
• Provides comprehensive protection including open/short circuit detection and overvoltage adjustment
• Enables flexible dimming via external PWM input or internally generated DC signals

Applications

• Large LCD panel backlight systems
• White LED array drivers
• Portable electronic display backlights

Procurement Notes

Verify the specific suffix LF-Z against the manufacturer's latest documentation to confirm lead-free status and RoHS compliance. Confirm the TSSOP-EP-16 package type matches your PCB footprint requirements. Check for obsolete status as some listings indicate this variant may be restricted for new designs. Ensure input voltage and thermal management align with the specified operating temperature range.

Selection Notes

Select this component when designing multi-string WLED backlights requiring high current matching precision. It is suitable for applications needing cascaded configurations to drive more than four strings using a single inductor. Consider the 540kHz fixed frequency for EMI planning. Verify that the external MOSFET selection supports the required voltage and current ratings for the boost topology.

Part Context

This part belongs to the MP3394 series of boost controllers specialized for white LED driving. It shares architectural similarities with variants like MP3394SGS but differs in package and specific electrical tolerances. The series is engineered for cost-effective, high-reliability backlight solutions in consumer electronics and industrial displays.

Replacement Considerations

MP3394ES-LF-Z and MP3394EY-LF-Z are documented variants within the same family. Verify pin compatibility and parameter differences before substitution. No direct cross-manufacturer substitutes are confirmed in public data.