EV3204DJ-00A
Fixed Frequency
White LED Driver
EV3204DJ-00A Rev. 1.1 www.MonolithicPower.com 1
10/18/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2007 MPS. All Rights Reserved.
The Future of Analog IC Technology
TM
TM
GENERAL 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.
ELECTRICAL SPECIFICATION
Parameter Symbol Value Units
Input Voltage VIN 2.5 to 6 V
Number of WLEDs 1 to 5
FEATURES
•On Board Power MOSFET
•Drives up to 5 Series White LEDs
•Up to 87% Efficiency
•Over 1MHz Fixed Switching Frequency
•Open Load Shutdown
•Low 104mV Feedback Voltage
•Soft-Start/PWM Dimming
•UVLO, Thermal Shutdown
•Internal Current Limit
APPLICATIONS
•Cell Phones
•Handheld Computers and PDAs
•Digital Still Cameras
•Small LCD Displays Application
“MPS” and “The Future of Analog IC Technology” are Trademarks of
Monolithic Power Systems, Inc.
EV3204DJ-00A EVALUATION BOARD
Dimensions (1.9”X x 1.8”Y x 0.4”Z)
Board Number MPS IC Number
EV3204DJ-00A MP3204DJ
88
87
86
85
84
83
82
81
80
79
78
77
EFFICIENCY (%)
5 101520
LED CURRENT (mA)
MP3204-EC01
Efficiency vs
LED Current
3 LEDs
4 LEDs
VIN=3.6V
5 LEDs
