MP3302DD-LF-P Datasheet, PDF (1/12 Pages) MPS Industries, Inc. – 40V, 1.3A, Single-cell Step-up White LED Driver with Single Wire Dimming Control

The Future of Analog IC Technology
DESCRIPTION
The MP3302 is a step-up converter designed for
driving arrays of WLEDS from a single cell
Lithium Ion battery. The MP3302 uses current
mode, fixed frequency architecture to regulate the
LED current, which is measured through an
external current sense resistor. Its low 200mV
feedback voltage reduces power loss and
improves efficiency. The MP3302 is turned off if
an over-voltage condition is present due to an
open circuit condition.
The MP3302 includes under-voltage lockout,
current limiting and thermal overload protection
preventing damage in the event of an output
overload.
The MP3302 is available in small 5-pin TSOT23
and 8-pin QFN (2mm x 3mm) packages.
MP3302
40V, 1.3A, Single-cell Step-up
White LED Driver
with Single Wire Dimming Control
FEATURES
• Internal Power MOSFET
• Drives up to 10 Series White LEDs
• Up to 87% Efficiency
• Single Wire Dimming Control
• 1.3MHz Fixed Switching Frequency
• Open Load Shutdown
• Low 200mV Feedback Voltage
• UVLO, Thermal Shutdown
• Internal 1.3A Current Limit
• Available in TSOT23-5 and 2mm x 3mm
QFN8 Packages
APPLICATIONS
• 5” ~ 7” LCD Panels
• Handheld Computers and PDAs
• Digital Still Cameras
• Small LCD Displays
“Monolithic Power Systems”, “MPS”, and “The Future of Analog IC Technology”
are Registered Trademarks of Monolithic Power Systems, Inc.
TYPICAL APPLICATION
V_IN
3.3V - 6V
Enable/
Dimming
Control
String 1 ... String 9
LED1
LED25
IN
SW
EN _MP3302
LED2
LED3
GND
FB
LED26
LED27
Efficiency vs
Input Voltage
3 WLEDs,9 Strings
95
90
85
80
75
70
65
60
3
4
5
6
INPUT VOLTAGE(V)
MP3302 Rev. 0.98
www.MonolithicPower.com
1
5/5/2010
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© 2010 MPS. All Rights Reserved.