MP3302

40V, 1.3A, Single-cell Step-up

White LED Driver

with Single Wire Dimming Control

MP3302 Rev. 0.98

www.MonolithicPower.com

1

5/5/2010

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2010 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3302 is a step-up converter designed for

driving arrays of WLEDS from a single cell

Lithium Ion battery. The MP3302 uses current

mode, fixed frequency architecture to regulate the

LED current, which is measured through an

external current sense resistor. Its low 200mV

feedback voltage reduces power loss and

improves efficiency. The MP3302 is turned off if

an over-voltage condition is present due to an

open circuit condition.

The MP3302 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload.

The MP3302 is available in small 5-pin TSOT23

and 8-pin QFN (2mm x 3mm) packages.

FEATURES

• Internal Power MOSFET

• Drives up to 10 Series White LEDs

• Up to 87% Efficiency

• Single Wire Dimming Control

• 1.3MHz Fixed Switching Frequency

• Open Load Shutdown

• Low 200mV Feedback Voltage

• UVLO, Thermal Shutdown

• Internal 1.3A Current Limit

• Available in TSOT23-5 and 2mm x 3mm

QFN8 Packages

APPLICATIONS

• 5” ~ 7” LCD Panels

• Handheld Computers and PDAs

• Digital Still Cameras

• Small LCD Displays

“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC Technology”

are Registered Trademarks of Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP3302

3.3V - 6V

Enable/

Dimming

Control

LED1

LED2

LED3

LED25

LED26

LED27

IN

EN

GND

FB

SW

String 1

String 9

...

3

60

65

70

75

80

85

90

95

4

56

INPUT VOLTAGE(V)

3 WLEDs,9 Strings

Efficiency vs

Input Voltage