EV3312-C-00A

Dual-Channel White LED Driver

Evaluation Board

EV3312-C-00A Rev.1.0

www.MonolithicPower.com

1

3/4/2014

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© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3312 is a dual-channel step-up WLED

driver with integrated 40V MOSFET, and

supports 2.7V to 5.5V power supply input. It

uses peak current mode to regulate the LED

current which is set by external resistor.

The MP3312 employs 1.2MHz fixed switching

frequency. It features supporting both PWM

input analog dimming and digital analog

dimming to accurately regulate the dimming

current.

The MP3312 integrates current source to

balance LED current, which leads good ILED

matching and accuracy performance.

In addition, the MP3312 has LED open and

short protection, cycle by cycle current limit

protection, and thermal shutdown protection. It

is available in tiny WLCSP1.3X 1.3-9 package.

ELECTRICAL SPECIFICATIONS

Parameter

Symbol

Value

Units

Input Voltage

2.7 – 5.5

V

Output Voltage

VLED

<35

V

LED String

2

string

LED Current

20/string

mA

FEATURES

• 2.7V~5.5V Input Voltage

• 1.2MHz Switching Frequency

• Dual Channels Support up to 30mA/String

• 1%

Current

Matching

Between

LED

Channels

• +/-2% Current Accuracy

• 38V OVP Protection

• PWM Input Analog Dimming Mode

• 5kHz to100kHz PWM Input Analog Dimming

• 100:1 Dimming Ratio

• 1-Wire Interface for Digital Dimming

• 9-bit Dimming Resolution

• Internal Soft Start to Reduce Inrush Current

• Available in WLCSP1.3X1.3-9 Package

APPLICATIONS

• Feature Phone and Smart Phones

• Tablets

• GPS Receivers

• <10 inch LCD video displays with one-cell

Li-ion battery

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance. “MPS” and “The

Future of Analog IC Technology” are Registered Trademarks of Monolithic

Power Systems, Inc.