MP3204

1.3MHz Fixed Frequency

5 White LED Driver with Open LED Protection

MP3204 Rev. 1.3

www.MonolithicPower.com

1

9/23/2005

MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.

© 2005 MPS. All Rights Reserved.

The Future of Analog IC Technology

TM

TM

DESCRIPTION

The MP3204 is a step-up converter designed

for driving up to 5 series white LEDs from a

single cell Lithium Ion battery. The MP3204

uses 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 MP3204 includes under-voltage lockout,

current limiting and thermal overload protection

preventing damage in the event of an output

overload. The MP3204 is available in a small

6-pin TSOT23 package.

EVALUATION BOARD REFERENCE

Board Number

Dimensions

EV3204DJ-00A

1.9”X x 1.8”Y x 0.4”Z

FEATURES

• On Board Power MOSFET

• Drives up to 5 Series White LEDs

• Up to 87% Efficiency

• Over 1MHz Fixed Switching Frequency

• Low 104mV Feedback Voltage

• Soft-Start/PWM Dimming

• UVLO, Thermal Shutdown

• Internal Current Limit

• Open Load Shutdown

• Available in a TSOT23-6 Package

APPLICATIONS

• Cell Phones

• Handheld Computers and PDAs

• Digital Still Cameras

• Small LCD Displays

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

Power Systems, Inc.

TYPICAL APPLICATION

MP3204

5V

LED1

LED2

LED3

LED4

LED5

EN

MP3204-TAC-S01

FB

OV

EN

1

5

3

2

4

6

SW

IN

GND

88

87

86

85

84

83

82

81

80

79

78

77

5

101520

LED CURRENT (mA)

MP3204-EC01

Efficiency vs

LED Current

3 LEDs

4 LEDs

5 LEDs