MP3385GR-P

Overview

The MP3385GR-P is a four-channel WLED boost controller from Monolithic Power Systems, designed for LCD panel backlighting. It operates with an input voltage range of 4.5 V to 33 V and supports a maximum output voltage of 80 V per channel. The device features a programmable switching frequency between 100 kHz and 900 kHz. Each channel delivers up to 300 mA with a current matching accuracy of 1.8%. It includes I2C interface control for dimming modes and protection settings. The component functions within a temperature range of -40°C to +125°C and utilizes a QFN-20 package.

Feature Summary

• Integrates four regulated current channels for driving WLED arrays in large LCD panels
• Supports multiple dimming modes including direct PWM, internal fixed frequency, and analog options via I2C or input pulses
• Features automatic detection and disabling of unused LED strings during startup to prevent overvoltage
• Provides comprehensive protection mechanisms including overcurrent, overtemperature, undervoltage, and short-circuit safeguards

Applications

• LCD panel backlighting systems
• WLED array driver circuits
• Portable electronic display modules

Procurement Notes

Verify the specific suffix GR-P against the manufacturer's latest documentation to confirm pinout and thermal pad configuration. Confirm RoHS compliance status through official datasheets. Note that this part may be marked as not recommended for new designs; consult MPS for current production status and alternative recommendations before finalizing procurement plans.

Selection Notes

Select this component for applications requiring precise current matching across four independent LED strings. Ensure the design accommodates the 4mm x 4mm QFN-20 package constraints. Verify that the system input voltage remains within the 4.5 V to 33 V range. Consider the I2C interface requirements for digital control integration and ensure the PCB layout supports the required switching frequency stability.

Part Context

The MP3385GR-P belongs to the MP3385 series of integrated WLED controllers. This series is engineered for high-efficiency backlighting solutions in mobile and portable devices. The GR variant specifically denotes the QFN-20 package option, distinguishing it from other package types like TSSOP-EP-20 available in the broader family.

Replacement Considerations

MP3385A is listed as an alternative for new designs.