MP3331 2.7-5.5V, 2A Synchronous Boost Flash LED Driver WLCSP9

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MP3331 2.7-5.5V, 2A Synchronous Boost Flash LED Driver WLCSP9

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MPS LED Drivers Boost LED Power Management WLCSP9

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MP3331 2.7-5.5V, 2A Synchronous Boost Flash LED Driver WLCSP9

The MPS MP3331 is a Synchronous Boost Flash LED Driver. It operates from a 2.7 V to 5.5 V input and is rated for 2 A. It is supplied in a WLCSP9 package.

The MP3331 is a highly-efficient, 2A, single flash LED driver in a very compact package for high- resolution camera phones that improves image and video quality in low-light environments.

Key Specifications

Part Number	MP3331
Function	Synchronous Boost Flash LED Driver
Input Voltage	2.7 V to 5.5 V
Output Voltage	5 V
Current Rating	2 A
Interface	I²C
Package	WLCSP9
Lifecycle	NRFND
Ordering Codes	MP3331

Features

2.7V to 5.5V Input Voltage
1/2/3/4MHz Selectable Switching Frequency
Switching Frequency Foldback Function
400kHz I2C Compatible Interface
Standby/Flash/Assist/Torch/Indicator/5V DC Mode FLASH MODE:
Up to 2A Programmable Current with +/-7% Accuracy ASSIST/TORCH MODE:
Up to 508mA Programmable Current with +/-7% Accuracy INDICATOR MODE:
Works in 31.5kHz PWM Dimming Mode with 2/16, 3/16, 4/16, 5/16 Duty Cycle 5V DC MODE:
Fixed 5V Output Voltage
External Torch/Strobe Pin

Typical Application Circuit

Applications

Camera Phone LED Flash

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.