SGM3131
SGM3131 is 120mA 4-Channel Charge Pump White LED Driver manufactured by SG Micro.
SGM3131 120mA 4-Channel Charge Pump White LED
Driver with Low Dropout Current Source
GENERAL DESCRIPTION
The SGM3131 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has automatically selectable 1×/1.5× fractional operation modes. The SGM3131 is well suited for white LED applications powered by a Li-Ion battery due to small equivalent open-loop resistance in 1× mode.
The supply voltage operates from 2.7V to 5.5V. The SGM3131 supports up to 4 LEDs for total maximum 120mA current. The ISET reference current is set through an external resistor on the ISET pin. The SGM3131 contains a 4-bit digital-to-analog...
