The BCT3140 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 BCT3140 automatically switches modes between step-up and step-down ensuring that LED current does not depend on the forward voltage. It switches at 1.5MHz, allowing the use of tiny components. The supply voltage ranges from 2.7V to 5.5V and is ideally suited for all applications powered by a single LI-Ion battery cell or three to four NiCd, NiMH, or Alkaline battery cells.
The BCT3140 also features a very low shutdown current, an automatic soft-start mode to limit inrush current, as well as over current, over voltage and over thermal shutdown control. A low current sense reference voltage (47mV) allows the use of small 0603 current sensing resistors.
The BCT3140 is available in Green DFN3x3-10L package and is specified over an ambient temperature range of -40°C to +85°C.