MP3378GY-P

Overview

The MP3378GY-P is a Monolithic Power Systems LED lighting driver IC featuring a 4-channel white LED controller and a high-efficiency buck converter. It operates from a 5 V to 24 V input voltage range with a fixed switching frequency of 235 kHz. The device provides an output current of 350 mA per channel in a 28-pin SOIC package with exposed pad. It supports analog and PWM dimming, functions within a -40°C to +125°C junction temperature range, and has a maximum power dissipation of 2 W.

Feature Summary

• Integrates a four-channel synchronous buck converter for driving white LED arrays
• Supports both analog and pulse-width modulation dimming control methods
• Includes internal soft-start circuitry to limit inrush current during startup

Applications

• LCD panel backlighting for tablets and notebooks
• Virtual reality display backlighting systems
• General-purpose white LED array illumination

Procurement Notes

Verify the specific suffix GY-P against the manufacturer's official datasheet to confirm pinout and thermal pad configuration. Ensure the design accounts for the 28-SOIC exposed pad soldering requirements. Confirm that the 235 kHz switching frequency aligns with electromagnetic interference constraints in the target application environment before finalizing procurement.

Selection Notes

Select this component when a compact solution for multi-channel white LED driving is required. The integrated buck topology eliminates external inductors if designed correctly, though external components are typically needed. Consider the 350 mA output capability and 24 V maximum input voltage limits. Verify compatibility with system dimming signals and ensure adequate thermal management for the SOIC-28 package under expected load conditions.

Part Context

This part belongs to the MP3378 series of LED drivers from Monolithic Power Systems. It is specifically engineered for portable electronics requiring efficient backlighting. The series focuses on integrating multiple drive channels into a single small-footprint package to reduce board space and simplify design complexity for mobile devices and displays.

Replacement Considerations

The MP3378GF-P is a documented variant within the same family. Verify pin-to-pin compatibility and electrical parameter equivalence before substitution. Other MPS models like the MP3314 series serve different topologies or channel counts and are not direct replacements.