MP3388 4.5-25V 50V, 8-String White LED Driver QFN24

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MP3388 4.5-25V 50V, 8-String White LED Driver QFN24

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MPS LED Drivers LED Power Management QFN24

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MP3388 4.5-25V 50V, 8-String White LED Driver QFN24

The MPS MP3388 is a 50V, 8-String White LED Driver. It operates from a 4.5 V to 25 V input. It is supplied in a QFN24 package.

The MP3388 is a step-up converter with 8-channel current sources designed for driving the white LED arrays for large size LCD panel backlighting applications.

Key Specifications

Part Number	MP3388
Function	50V, 8-String White LED Driver
Input Voltage	4.5 V to 25 V
Interface	PWM
Package	QFN24
Ordering Codes	MP3388

Features

High Efficiency and Small Size
4.5V to 25V Input Voltage Range
50V Maximum Step-up Voltage
Balanced Driver for 8 Strings of WLED
3% Current Matching Accuracy Between Strings
Selectable Switching Frequency: 1.25MHz or 625kHz
PWM or DC Input Burst PWM Dimming
Programmable Over-voltage Protection
Under Voltage Lockout
Open and Short LED protection

Typical Application Circuit

Applications

Notebook PC
Small LCD TV
Handy Terminals Display

Design Notes

Channel-to-channel current matching sets backlight uniformity; check the matching spec at the current you will actually run.
In boost topologies the OVP threshold must clear the worst-case forward voltage of the longest string, including temperature and binning spread.
Keep PWM dimming above 200 Hz to stay clear of visible flicker, and away from the audio band if the product has a speaker.
Size the inductor and output capacitor for the string current ripple, not the total LED current.