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PS1518 Datasheet(PDF) 1 Page - Power IC Ltd. |
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PS1518 Datasheet(HTML) 1 Page - Power IC Ltd. |
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1 / 12 page  FEATURES On Board Power MOSFET Drives up to 8 Series White LEDs Up to 87% Efficiency Over 645 KHz Fixed Switching Frequency Open Load Shutdown Low 100mV Feedback Voltage Soft Start/PWM Dimming UVLO, Thermal Shutdown Internal Current Limit Available in 6L-SOT26 and QFN-8 Packages APPLICATIONS Cell Phones Handheld Computers and PDAs. Digital Still Cameras. Small LCD Displays DESCRIPTION The PS1518 is a step up converter designed for driving up to 8 series white LEDs from 5V input. The PS1518 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 PS1518 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. The PS1518 is available in small 6-pin TSOT23. TYPICAL APPLICATION CIRCUIT High Efficiency, Fixed Frequency WLED Driver PS1518 July 2007 www.picsemi.com © 2007 Power IC. All Rights Reserved. 1 |
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