MP3388SGR-P

Overview

The MP3388SGR-P is a boost topology LED lighting driver IC from Monolithic Power Systems, designed for white LED applications. It features an input voltage range of 4.3 V to 25 V and supports a maximum output voltage of 55 V. The device provides eight independent current sources for balanced driving of up to eight LED strings, with a specified current matching accuracy of 2.5%. It operates at selectable switching frequencies of 625 kHz or 1.25 MHz and utilizes a QFN-24 package. Key electrical parameters include a maximum power dissipation of 2.9 W and a supply current of 1.8 mA.

Feature Summary

• Provides eight independent current sources for balanced driving of multiple LED strings
• Supports PWM dimming and DC input burst mode dimming for flexible brightness control
• Integrates comprehensive protection mechanisms including open LED, short circuit, overvoltage, undervoltage lockout, and overtemperature shutdown

Applications

• LCD panel backlighting
• White LED array drivers
• Large LCD panel backlight systems

Procurement Notes

Verify the specific suffix 'SGR' corresponds to the QFN-24 package and extended temperature range (-40°C to +125°C) as indicated in distributor specifications. Confirm that the component status is active, as other variants within the MP3388 family are marked as Not Recommended for New Designs (NRND). Ensure compatibility with the required switching frequency selection via external components.

Selection Notes

Select this component when designing high-efficiency backlighting solutions requiring precise current balancing across eight channels. The wide input voltage range accommodates various battery-powered or regulated supply sources. Consider the thermal performance given the 2.9 W power dissipation rating in the compact QFN-24 package. Verify that the 55 V output capability exceeds the total forward voltage of the target LED string configuration.

Part Context

The MP3388SGR-P belongs to the MP3388 series of monolithic boost converters specifically engineered for driving white LEDs in display applications. This series distinguishes itself through high current matching precision between channels, reducing color non-uniformity in large displays. The SGR variant specifically denotes the QFN-24 package option, offering a compact footprint suitable for space-constrained portable electronics and thin display modules.

Replacement Considerations

MP3388DR-LF-P: Similar 8-channel boost driver but limited to 50V output and -40°C to +85°C operating temperature range.

FAQ

What is the current matching accuracy between the eight LED channels?

The MP3388SGR-P provides a current matching accuracy of 2.5% between the LED strings.

Does the MP3388SGR-P support external PWM dimming?

Yes, the device supports both external PWM dimming and DC input burst mode dimming for brightness control.