MP3359 3.5-40V, 150mA, 4CH Boost WLED Driver QFN-20

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MP3359 3.5-40V, 150mA, 4CH Boost WLED Driver QFN-20

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pMPS MP3359 — Boost WLED Driver, 3.5-40V input, 150 mA output, 4 channels, QFN-20./p

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MPS QFN-20 LED Drivers Boost WLED LED Power Management

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MP3359 3.5-40V, 150mA, 4CH Boost WLED Driver QFN-20

The MPS MP3359 is a Boost WLED Driver. It operates from a 3.5 V to 40 V input, is rated for 150 mA and drives 4 LED strings. It is supplied in a QFN-20 package.

The MP3359 is a step-up converter with four channel current sources.

Key Specifications

Part Number	MP3359
Function	Boost WLED Driver
Input Voltage	3.5 V to 40 V
Current Rating	150 mA
Channels	4
Interface	PWM
Package	QFN-20
Ordering Codes	MP3359

Features

3.5V to 40V Input Voltage (VIN) Range
4 Channels with a Maximum of 150mA per Channel
Internal 100mΩ, 50V MOSFET
Configurable Switching Frequency (fSW) Up to 2.2MHz
External Sync Switching (SW) Function
Pulse-Width Modulation (PWM) Dimming
Analog Dimming
Deep Dimming Ratio
Excellent EMI Performance and Frequency Spread Spectrum (FSS)
Fixed 100µs Delay Time between LED Current Channels during PWM Dimming (Replaces Phase Shift)

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.