The SGM3140 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 SGM3140 automatically switches modes between
step-up and step-down ensuring that LED current does
not depend on the forward voltage. It switches at
2.2MHz, 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 SGM3140 also features a very low shutdown
current, an automatic soft-start mode to limit inrush
current, as well as over-current, over-volt SGM3140YD10G/TR资料下载
