MP3398LGS-P

Overview

The MP3398LGS-P is a four-channel boost white LED controller from Monolithic Power Systems, designed for large LCD panel backlighting. It operates within an input voltage range of 4.5V to 28V and supports a maximum output current of 350mA per channel. The device utilizes a fixed switching frequency of 540kHz with adjustable external resistance options. Packaged in a SOIC-16 format, it features open-drain outputs and adjustable voltage regulation. The component functions reliably across a temperature range of -40°C to +125°C.

Feature Summary

• Supports independent analog and PWM dimming modes for flexible brightness control
• Provides cascading capability by sharing a single sense power supply across multiple ICs
• Includes comprehensive protection mechanisms such as over-temperature, over-voltage, and open/short LED detection

Applications

• Large LCD panel backlighting systems
• Virtual reality display backlighting applications
• USB-powered lighting devices requiring low input voltage operation

Procurement Notes

Verify the specific suffix P against official datasheets to confirm package type and tape/reel specifications. Ensure compatibility with required operating temperatures and input voltage ranges before integration. Cross-reference manufacturer part numbers to avoid confusion with similar series variants like MP3398A. Confirm humidity sensitivity handling requirements during storage and assembly processes.

Selection Notes

Select this component when designing high-density LED arrays requiring precise current matching between channels. The integrated current sources ensure high accuracy without external balancing components. Consider the SOIC-16 footprint for space-constrained PCB layouts. Evaluate thermal management needs given the power dissipation characteristics under full load conditions.

Part Context

This part belongs to the MP3398L series, which offers lower input voltage thresholds compared to the MP3398A variant. This distinction enables suitability for USB-powered applications where standard 5V inputs are common. The series focuses on delivering stable performance for multi-channel white LED driving in professional display environments.

Replacement Considerations

MP3398LGS-Z serves as a direct alternative within the same series. Verify pinout compatibility and electrical specifications before substitution. Ensure that any replacement maintains the required four-channel boost topology and current regulation capabilities.