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PS1313 Datasheet, PDF (1/9 Pages) Power IC Ltd. – High Efficiency, High Power White-LED Driver | |||
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FEATURES
 On Board Power MOSFET
 Drives up to 4 strings of parallel LEDs
 Up to 87% Efficiency
 1.4MHz Fixed Switching Frequency
 Open Load Shutdown
 Low 100mV Feedback Voltage
 Soft Start
 PWM Dimming Control
 UVLO, Thermal Shutdown
 Internal Circuit Limit
 Available in SOT26 Package
APPLICATIONS
 WLED Backlight
 Cell Phones
 Handheld Computers and PDAs
 Digital Cameras
 Small LCD Displays
 LED Module
 Game Devices
TYPICAL APPLICATION CIRCUIT
PS1313
High Efficiency, High Power
White-LED Driver
DESCRIPTION
The PS1313 is a step up converter designed for
driving up to 4 branches with 4 white LEDs in series
in each branch, providing backlight in cell phones,
PDAs, and other hand-held devices. The PS1313
uses current mode, fixed frequency architecture to
regulate the LED current, which is measured
through an external current sense resistor. Its low
100mV 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 PS1313 includes under-voltage lockout, current
limiting and thermal overload protection preventing
damage in the event of an output overload. The
PS1313 is available in small 6-pin SOT26 Package.
Fig: Typical Application Circuit with 20mA Output
July 2007
www.picsemi.com
© 2007 Power IC. All Rights Reserved.
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