MP3387LGRT-Z

Overview

The MP3387LGRT-Z is a six-channel boost DC-DC converter designed for driving white LED arrays in LCD backlighting. It operates with an input voltage range of 3V to 25V and generates up to 45V output. Each channel provides independent current regulation with a maximum output current of 45mA and a matching accuracy of 3%. The device supports mixed analog and PWM dimming, switching frequencies from 100Hz to 27.5kHz, and includes protections such as OCP, OVP, OTP, and LED open/short circuit detection.

Feature Summary

• Six independent current sources for precise LED string balancing
• Mixed-mode dimming combining analog and PWM signals for high contrast ratios
• Automatic frequency shifting to ultrasonic range to eliminate audible noise
• Comprehensive protection suite including over-voltage, over-current, and thermal shutdown

Applications

• Backlighting for tablet computers
• Backlighting for laptop displays
• Medium-to-large size LCD panel illumination

Procurement Notes

Verify the specific suffix (Z or P) against the required packaging format, as these denote different reel or cut-tape configurations. Confirm RoHS compliance status and ensure the TQFN-24 package dimensions align with the PCB footprint design. Cross-reference the manufacturer's latest datasheet for any updates on recommended operating conditions and thermal characteristics before finalizing procurement.

Selection Notes

Select this component when designing systems requiring six independent LED channels with high current matching precision. It is suitable for applications needing flexible dimming control via a single input pin. Ensure the input power supply can handle the peak currents required by the boost topology. Consider the thermal performance of the TQFN-24 package relative to the expected ambient temperature and heat dissipation constraints of the host device.

Part Context

This part belongs to the MP3387L series from Monolithic Power Systems, specialized for WLED driver applications. It utilizes a peak current mode PWM control structure to regulate LED brightness efficiently. The series is engineered for integration into portable electronic devices where space and power efficiency are critical constraints for display backlighting solutions.

Replacement Considerations

MP3387LGRT-P is a verified substitute within the same series, differing primarily in packaging configuration rather than electrical function.