MP3385GR-Z

Overview

The MP3385GR-Z is a four-channel white LED (WLED) controller from Monolithic Power Systems, designed for LCD panel backlighting. It utilizes a boost topology with an input voltage range of 4.5 V to 33 V and supports output voltages up to 80 V. The device operates at a programmable switching frequency between 100 kHz and 900 kHz. It features I2C digital interface control for dimming modes and protection settings. The IC is housed in a QFN-20 package and operates within a temperature range of -40°C to +125°C.

Feature Summary

• Integrates four regulated current channels with 1.8% matching precision per string.
• Supports multiple dimming methods including direct PWM, analog, and internal I2C-controlled modes.
• Includes automatic unused channel detection during startup to prevent overvoltage.
• Provides comprehensive protection against overcurrent, overtemperature, and short circuits.

Applications

• LCD panel backlighting
• White LED array driving
• Mid-to-large display systems

Procurement Notes

Verify the NRND status before integration, as this component is not recommended for new designs. Confirm availability through authorized distributors, noting that production may be limited or discontinued for new orders. Check for the recommended alternative MP3385A if designing new hardware. Ensure compliance with RoHS standards and verify the specific reel packaging requirements for surface-mount assembly.

Selection Notes

Select this controller for applications requiring precise current matching across four WLED strings. The I2C interface allows flexible configuration of dimming ratios and protection thresholds. Consider the 80V absolute rating for high-voltage LED arrays. Evaluate the thermal performance within the specified operating temperature range. Verify compatibility with the system's input voltage supply constraints.

Part Context

This part belongs to the MP3385 series of WLED controllers. It is specifically designated with the GR-Z suffix indicating the QFN-20 package and tape-and-reel packaging. The manufacturer indicates it is not recommended for new designs, suggesting the MP3385A as the preferred alternative for future projects.

Replacement Considerations

The MP3385A is publicly confirmed as the alternative part for new designs. Verify pinout and parameter compatibility when substituting.