AAT3172IWP-T1

DATA SHEET AAT3172 High Current LED Flash Driver Charge Pump General Description Features The AAT3172 is a high output current, high efficiency, low noise, low profile charge pump DC/DC converter, ideal for multi-function LED photo-flash applications where solution cost, size, and efficiency are critical. • • • • • • • • • • • • • • The dual charge pump in the AAT3172 is capable of delivering 600mA output current. Two current-controlled paths are available for users of dual flash LEDs that prefer current matching. Each LED channel can be easily programmed in 32 steps with a single GPIO output through the AS2Cwire™ (Advanced Simple Serial Control™) interface. This allows smooth transitions and flexible adjustment of brightness in flash or other lighting modes. The tri-mode (1X/1.5X/2X) operation of the internal charge pump offers excellent power efficiency for both flash and movie modes. Combined with a low external parts count (two 1μF flying capacitors and one small bypass capacitor at VIN and OUT), the AAT3172 is ideally suited for small, battery-powered applications. VIN Range: 2.7V to 5.5V 600mA Output Current Tri-Mode 1X/1.5X/2X in Current Mode Voltage Mode Operation: 1.5X, 100mA Dual Regulated Current Sinks Current Match Between Current Sinks 32 Current Steps Set by AS2Cwire 1μF Input, Output, and Flying Capacitors