EV3331-C-00A
2A Flash LED Driver With I
2
C Interface
Evaluation Board
EV3331-C-00A Rev.1.0 www.MonolithicPower.com 1
5/19/2015 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2015 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The MP3331 is a single 2A flash LED driver with
very compact package, high efficiency for high-
resolution camera phones to improve image and
video quality in low light environment. The device
operates in 1/2/3/4MHz synchronous DCDC
boost converter to provide an optimized solution
for smaller PCB space and higher efficiency.
The MP3331 features standard I
2
C interface,
single LED channel, rich protection modes and
high power density and performances. It
supports flash/assist light/torch/indicator/5V DC
modes.
The cathode of the flash LED is referenced to
GND which is better for layout to improve thermal
performance. It is available in WLCSP9-
1.7X1.7mm package.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input Voltage V
IN
2.7-5.5 V
Output Voltage Vout <5.5 V
LEDs # 1
LED Current I
LED
Max.2 A
FEATURES
• 2.7V~5.5V input voltage
• 1/2/3/4MHz selectable switching frequency
• Switching frequency fold-back function
• 400kHz I
2
C 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:
Work 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
• Low battery voltage protection
• Pre-flash for auto detect load condition
• LED short/open protection
• VOUT-GND short protection
• Over voltage protection
• Input to output disconnection protection
• Over temperature protection
• Input under voltage lockout protection
• Thermal protection
• Available in WLCSP9-1.7X1.7mm
APPLICATIONS
• Displays Camera Phone LED Flash
• Tablets
• Digital Still Camera
All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. Fo
MPS green status, please visit MPS website under Quality Assurance. “MPS”
and “The Future of Analog IC Technology” are Registered Trademarks o
Monolithic Power Systems, Inc.
