MP3312
2.7V-5.5V Input , 38V OVP,
Dual-Channel White LED Driver
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 WLCSP1.35x1.35-9 package.
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
1-Wire Interface for Digital Dimming
9-bit Dimming Resolution
Internal Soft Start to Reduce Inrush Current
Available in WLCSP1.35x1.35-9 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, halogen 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.
TYPICAL APPLICATION
VIN
C1
L1
D1
C2
GND
EN/1 Wire
SW
IN
EN MP3312
PWM
R2
C3
PWM
LED1
COMP
LED2
ISET
GND
R1
MP3312 Rev. 1.1
www.MonolithicPower.com
1
12/7/2020
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2020 MPS. All Rights Reserved.
