MP3202 Datasheet, PDF (1/9 Pages) Monolithic Power Systems – 1.3A Fixed Frequency White LED Driver

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.
MP3202
1.3A Fixed Frequency
White LED Driver
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
V_IN
4.5V - 6V
IN
SW
EN
EN _MP3202 OV
GND
FB
13 Strings
Efficiency vs
Input Voltage
100
I_OUT=100mA
90
I_OUT=180mA
80
70
60
50
4.0 4.5 5.0 5.5 6.0
INPUT VOLTAGE (V)
MP3202 Rev. 0.91
www.MonolithicPower.com
1
9/21/2007
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© 2007 MPS. All Rights Reserved.