MP3366 3-25V, 600kHz White LED Driver WLCSP-18

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MP3366 3-25V, 600kHz White LED Driver WLCSP-18

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pMPS MP3366 — White LED Driver, 3-25V input, WLCSP-18./p

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MPS LED Drivers LED Power Management WLCSP-18

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MP3366 3-25V, 600kHz White LED Driver WLCSP-18

The MPS MP3366 is a White LED Driver. It operates from a 3 V to 25 V input and switches at 600 kHz. It is supplied in a WLCSP-18 package.

The MP3366 is a step-up converter with 6- channel current sources designed to drive white LED arrays for backlighting in mid- to large- sized LCD panels.

Key Specifications

Part Number	MP3366
Function	White LED Driver
Input Voltage	3 V to 25 V
Switching Frequency	600 kHz
Interface	PWM
Package	WLCSP-18
Ordering Codes	MP3366

Features

6-String, Max 45mA/String
3V to 25V Input Voltage Range
1.5% Current Matching Accuracy between Strings
600kHz Switching Frequency
Combined Analog and PWM Dimming Mode with 25% Dimming Transfer Point
23.5kHz to 29.5kHz Output Dimming Frequency to Eliminate Audible Noise
Programmable Over-Voltage Protection (OVP)
Open and Short LED String Protection
Recoverable Thermal Shutdown Protection
Cycle-by-Cycle Over-Current Protection (OCP)

Typical Application Circuit

Applications

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.