AIC3643 converter equivalent, built-in ovp white led step-up converter.
Built-In Open Circuit Protection Over Voltage Protection Efficiency Up to 83% at VIN=4.2V, 3LEDs, ILED=20mA 1.2MHz Fixed Switching Frequency Drives Up to 5LEDs in series .
Cellular Phones PDAs DSCs Handheld Devices White LED Display Backlighting
TYPICAL APPLICATION CIRCUIT
3.0~4.2V C1 1μF L.
AIC3643 is a current-mode pulse-widthmodulation (PWM), step-up DC/DC converter designed to drive white LEDs with a constant current to provide backlight in hand-held devices. Series connection of LEDs provides identical LED currents resulting in unif.
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