MP3364 3.5-36V, 4CH Maximum 150mA/Ch Boost WLED Driver QFN-24

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MP3364 3.5-36V, 4CH Maximum 150mA/Ch Boost WLED Driver QFN-24

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pMPS MP3364 — Maximum 150mA/Ch Boost WLED Driver, 3.5-36V input, 150 mA output, 4 channels, QFN-24./p

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MPS QFN-24 LED Drivers Boost WLED LED Power Management

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MP3364 3.5-36V, 4CH Maximum 150mA/Ch Boost WLED Driver QFN-24

The MPS MP3364 is a Maximum 150mA/Ch Boost WLED Driver. It operates from a 3.5 V to 36 V input, is rated for 150 mA and drives 4 LED strings. It is supplied in a QFN-24 package.

The MP3364 is a step-up converter with four channel current sources.

Key Specifications

Part Number	MP3364
Function	Maximum 150mA/Ch Boost WLED Driver
Input Voltage	3.5 V to 36 V
Current Rating	150 mA
Channels	4
Interface	I²C
Package	QFN-24
Ordering Codes	MP3364

Features

3.5V to 36V Input Voltage Range
4 Channels with Maximum 150mA per Channel
Internal 100mΩ, 50V MOSFET
Configurable fSW Up to 2.2MHz
External Sync SW Function
Multi-Dimming Operation Mode through PWM Input, Including: o Direct PWM Dimming o Analog Dimming o Mixed Dimming with 25% or 12.5% Transfer Point
15000:1 Dimming Ratio during PWM Dimming when fPWM ≤ 200Hz
200:1 Dimming Ratio during Analog Dimming through PWM Dimming Signal Input
Excellent EMI Performance, Frequency Spread Spectrum
I2C Interface, 3 Selectable IC Addresses

Typical Application Circuit

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.