SP6686

August 2009 SP6686 400mA Buck/Boost Charge Pump LED Driver Rev. 2.0.0 GENERAL DESCRIPTION The SP6686 is a current-regulated charge pump ideal for powering high brightness LEDs for camera flash applications. The charge pump can be set to regulate two current levels for FLASH and TORCH modes. The SP6686 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. A low current sense reference voltage (50mV) allows the use of small 0603 current sensing resistors. The SP6686 is designed to operate from a single cell lithium-ion battery or fixed 3.3V or 5.0V power rails and is available in a RoHS compliant, “green”/halogen free space saving 10-pin 3mmx3mm DFN package TYPICAL APPLICATION DIAGRAM APPLICATIONS White LED Torch/Flash for Mobile Phones, DSCs and Camcorders Generic Lighting/Flash/Strobe Applications White LED Backlighting FEATURES Output Current up to 400mA Up to 94% Efficiency in Torch Mode...