EV3391EF-00A

8 String White LED Driver

Evaluation Board

EV3391EF-00A Rev.1.0

www.MonolithicPower.com

1

11/9/2011

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© 2011 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The EV3391EF-00A is an evaluation board for

the MP3391EF, 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

10 – 28

V

LEDs #

8 strings parallel and

12 LEDs/string

LED Current

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.