MP3202

1.3A Fixed Frequency

White LED Driver

MP3202 Rev. 0.91

www.MonolithicPower.com

1

9/21/2007

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2007 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP3202 is a step-up converter designed for

driving up to 39 white LEDs (13 strings of 3 LEDs

each) from a 5V system rail. The MP3202 uses a

current mode, fixed frequency architecture to

regulate the LED current, which is measured

through an external current sense resistor. Its low

104mV feedback voltage reduces power loss and

improves efficiency. The OV pin monitors the

output voltage and turns off the converter if an

over-voltage condition is present due to an open

circuit condition.

The MP3202 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload.

The MP3202 is available in small 6-pin TSOT23

or 8-pin QFN (2mm x 2mm) packages.

FEATURES

• 2.5V to 6V Input Voltage Range

• On Board Power MOSFET

• Drives up to 39 White LEDs at 5V Input

• Up to 92% Efficiency

• Over 1MHz Fixed Switching Frequency

• Open Load Shutdown

• Low 104mV Feedback Voltage

• Soft-Start/PWM Dimming

• UVLO, Thermal Shutdown

• Internal 1.3A Current Limit

• Available in TSOT23-6 and QFN8 Packages

APPLICATIONS

• Cell Phones

• Handheld Computers and PDAs

• Digital Still Cameras

• Small LCD Displays

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks of

Monolithic Power Systems, Inc.

TYPICAL APPLICATION

MP3202

4.5V - 6V

EN

13 Strings

IN

EN

GND

OV

FB

SW

100

90

80

70

60

50

4.0

4.5

5.0

5.5

6.0

INPUT VOLTAGE (V)

Efficiency vs

Input Voltage