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MP3376 3-30V, 8CH WLED Driver QFN-24

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MPS QFN-24 LED Drivers WLED LED Power Management

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MP3376 3-30V, 8CH WLED Driver QFN-24

The MPS MP3376 is a WLED Driver. It operates from a 3 V to 30 V input and drives 8 LED strings. It is supplied in a QFN-24 package.

The MP3376 is a synchronous boostconverter with eight current channels designed to drive WLED arrays for LCDpanelsin tablets and notebook backlighting applications.

Key Specifications

Part Number	MP3376
Function	WLED Driver
Input Voltage	3 V to 30 V
Output Voltage	36 V
Channels	8
Interface	I²C
Package	QFN-24
Ordering Codes	MP3376

Features

8Channels with Max50mA/Channel
Synchronous Converter with LS-FET/HS- FET 160mΩ/260mΩOn Resistance
3V to 30V Input Voltage Range
Up to 36V Output Voltage
Max 2.5% Current Matching
350kHz/500kHz/650kHz/800kHz/950kHz/1. 2MHz/1.8MHz/2.4MHz Selectable Switching Frequency
A0, A1 Pins for FourI2C Addresses
0mA to 50mA Full-Scale Current Set, 8- Bit,0.196mA/Step
Selectable Sync or Non-Sync Mode
Customizable Default Register Values

Typical Application Circuit

Applications

Tablets/Notebooks

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.