The SGM3141 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 SGM3141 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 SGM3141 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-temperature
thermal shutdown control.
A low current-sense reference voltage (47mV) allows the
use of small 0603 current sensing resistors. SGM3141YD10G/TR资料下载
