CP2125E v0.9 product brief dc/dc series step-up white-led driver with built-in over-voltage protection copyright ?2008 chiphomer technology limited 1 general description the CP2125E is a step-up dc/dc converter specifically designed for driving white leds with a constant current. the device can drive up to 5 white leds from a 3.0v power supply. pwm dimming control is supported to adjust the brightness of white leds. the CP2125E switch at 1.1 mhz, allowing the use of tiny components. 105mv/200mv feedback voltage minimizes the power loss in the current setting resistor for better efficiency. the CP2125E is equipped with built-in over-voltage protection function, the sw pin monitors the output voltage and will turn off the device if an over-voltage condition is present to prevent damage from an open circuit condition. the CP2125E is available in sot23-5l package. features y inherently matched led current y high efficiency: 84%(typical) y drives up to 5 leds from a 3.0v power supply y built-in over-voltage protection y fast 1.1 mhz switching frequency y shutdown current: <1 a y low profile sot23-5l package applications y mobile phones y digital still cameras y mp3 players y pdas y gps receivers pin configurations CP2125E top view sot23-5l sot23-5l -40 ~85
CP2125E v0.9 product brief dc/dc series step-up white-led driver with built-in over-voltage protection copyright ?2008 chiphomer technology limited 2 typical application circuit(s) contact with chiphomer 4f, building d, 1618 yishan road shanghai, 201103, p.r.c. tel: (86)21-64014543 64058488 fax: (86)21-64050030 sale: sales@chiphomer.com technical support: support@chiphomer.com web site: www.chiphomer.com shenzhen office: 10d, building 2, dushi yangguang garden chegongmiao, futian district, shenzhen, 518048, p.r.c. tel: (86)755-82046706 82047789 fax: (86)755-8204670
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