SGM3140B
SGM3140B is 500mA Buck/Boost Charge Pump LED Driver manufactured by SG Micro.
SGM3140B 500mA Buck/Boost Charge Pump LED Driver
GENERAL DESCRIPTION
The SGM3140B 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 SGM3140B 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 ponents. 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 SGM3140B also Features a very low...
