MP3378 4CH 24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter SOIC28

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MP3378 4CH 24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter SOIC28

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pMPS MP3378 — 24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter, 24V input, 4 channels, SOIC28./p

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MPS LED Drivers WLED LED Controller Buck Converter

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MP3378 4CH 24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter SOIC28

The MPS MP3378 is a 24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter. It accepts up to 24 V at the input and drives 4 LED strings. It is supplied in a SOIC28 package.

The MP3378 is a one-chip solution designed for monitor applications.

Key Specifications

Part Number	MP3378
Function	24 V, 4-Channel WLED Controller Plus High-Efficiency Buck Converter
Input Voltage	up to 24 V
Channels	4
Interface	PWM
Package	SOIC28
Ordering Codes	MP3378

Features

WLED Controller:
4-String, Max 350 mA/String WLED Controller
Up to 24 V Input Voltage Range
2.5% Current Matching Accuracy
Programmable Switching Frequency
PWM and Analog Dimming Mode
Open and Short LED Protection
Programmable Over-Voltage Protection
Recoverable Thermal Shutdown Protection
Over-Current Protection

Typical Application Circuit

Applications

Desktop LCD Flat Panel Displays
Flat Panel Video Displays

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.