TM
MP3204
1.3MHz Fixed Frequency
5 White LED Driver with Open LED Protection
The Future of Analog IC Technology
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.
FEATURES
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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
Cell Phones
Handheld Computers and PDAs
Digital Still Cameras
Small LCD Displays
APPLICATIONS
EVALUATION BOARD REFERENCE
Board Number
EV3204DJ-00A
Dimensions
1.9”X x 1.8”Y x 0.4”Z
“MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic
Power Systems, Inc.
TYPICAL APPLICATION
V
IN
5V
LED1
LED2
EFFICIENCY (%)
Efficiency vs
LED Current
88
87
86
85
84
83
82
81
80
79
78
77
4 LEDs
LED3
6
1
SW
5
OV
4
2
IN
EN
LED4
LED5
EN
5 LEDs
MP3204
FB
GND
3
3 LEDs
V
IN
=3.6V
5
10
15
LED CURRENT (mA)
20
MP3204-TAC-S01
MP3204-EC01
MP3204 Rev. 1.3
9/23/2005
www.MonolithicPower.com
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.
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