EV3312-C-00A
Dual-Channel White LED Dri ver
Evaluation Board
EV3312-C-00A Rev.1.0 www.MonolithicPower.com 1
3/4/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 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 V
IN
2.7 – 5.5 V
Output Voltage VLED <35 V
LED String 2 string
LED Current I
LED
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 Monolithi
Power Systems, Inc.