EV3391EY00A
8 String White LED Driver
Evaluation Board
EV3391EY-00A Rev.1.0 www.MonolithicPower.com 1
11/9/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2011 MPS. All Rights Reserved.
The Future of Analog IC Technology
DESCRIPTION
The EV3391EY-00A is an evaluation board for
the MP3391EY, a step-up converter designed
for large liquid-crystal displays that employ an
array of LEDs as the light source. It can drive
up to 8 WLED strings in parallel with 80mA
maximum current.
The MP3391 uses external power MOSFET
and internal current mode, fixed frequency
architecture and includes current ballast in each
string terminal, which achieves 2.5% current
regulation accuracy between strings. Low
feedback voltage at each LED string help
reduce power loss and improve efficiency.
The MP3391 is flexible for extending LED
channels with two or more MP3391s in parallel.
The MP3391 has multiple features to protect
the converter from fault conditions, including
under-voltage lockout, current limiting, over
voltage, short LED, open LED and thermal
shut-down protection.
ELECTRICAL SPECIFICATIONS
Parameter Symbol Value Units
Input
Voltage
V
IN
10 – 28 V
LEDs #
8 strings parallel and
12 LEDs/string
LED Current I
LED
60/string mA
FEATURES
• 10V to 28V Input Voltage Range
• External Power MOSFET
• Up to 90% Efficiency
• Programmable Over Voltage Protection
• Drives up to 8 Strings Parallel 2.5% Current
Regulation Accuracy Between Strings
• Programmable Switching Frequency:
• PWM or DC Input Burst PWM Dimming
• Open and Short LED Load Protection
• Thermal Shutdown
• Flexible Extended Channels Applications
APPLICATIONS
• Notebook PC
• LCD Monitor
• LCD TV
• Handy Terminals Display
• Automotive Systems and Tablet Computer
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.
