MP3385GF-Z

Overview

The MP3385GF-Z is a 4-channel white LED (WLED) boost controller designed for LCD backlight applications. It operates with an input voltage range of 4.5 V to 33 V and supports a maximum output voltage of 75 V. The device features a programmable switching frequency between 100 kHz and 900 kHz. It integrates an I2C interface for configuration and control, supporting analog, PWM, and hybrid dimming modes. The component is housed in a QFN-20 package and is rated for operation from -40°C to +125°C.

Feature Summary

• Integrates an I2C digital interface for flexible configuration of operating modes, protection thresholds, and dimming parameters.
• Supports multiple dimming methods including direct PWM, internal fixed-frequency PWM, analog, and hybrid modes.
• Features automatic detection and disabling of unused LED channels during startup to prevent overvoltage conditions.
• Provides comprehensive protection mechanisms including overcurrent, overtemperature, undervoltage, and short-circuit protection.

Applications

• LCD panel backlighting for tablets
• LCD panel backlighting for notebook computers
• Virtual reality (VR) display backlighting

Procurement Notes

Verify the specific suffix 'Z' against the manufacturer's current documentation to confirm RoHS compliance status and lead times. Note that this part number may be designated as Not Recommended for New Designs (NRND); consult official MPS resources for active alternative recommendations such as the MP3385A series before finalizing procurement plans.

Selection Notes

Select this component for designs requiring precise multi-string WLED regulation with digital control capabilities. Ensure the application input voltage remains within the 4.5 V to 33 V range and that the required output voltage does not exceed the 75 V limit. Verify compatibility with the QFN-20 footprint and thermal requirements for the target operating environment.

Part Context

This device belongs to the MP3385A family of WLED drivers from Monolithic Power Systems. It serves as a specialized integrated circuit for driving white LED arrays in portable electronic displays. The part replaces older variants like the standard MP3385 while maintaining similar functional architectures but with updated packaging or compliance specifications.

Replacement Considerations

Publicly documented alternatives include the MP3385AGR-P and the MP3385A series. These parts offer similar 4-channel boost control functionality. Verify pinout compatibility and electrical parameter alignment when substituting.