EV3204DJ-00A Datasheet, PDF (1/3 Pages) Monolithic Power Systems – Fixed Frequency White LED Driver

TM
The Future of Analog IC Technology ^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
Input Voltage
Number of WLEDs
Symbol
V_IN
Value
2.5 to 6
1 to 5
Units
V
EV3204DJ-00A
Fixed Frequency
White LED Driver
EVALUATION BOARD
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
EV3204DJ-00A
MPS IC Number
MP3204DJ
Efficiency vs
LED Current
88
87
4 LEDs
86
85
84
83
5 LEDs
82
81
80
3 LEDs
79
78
V_IN=3.6V
77
5
10
15
20
LED CURRENT (mA)
MP3204-EC01
EV3204DJ-00A Rev. 1.1
www.MonolithicPower.com
1
7/13/2005
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
© 2005 MPS. All Rights Reserved.