Datasheet Summary
SGM3122 PWM Dimming, Charge Pump White LED Driver with Low Dropout Current Source
GENERAL DESCRIPTION
The SGM3122 is a current-regulated white LED driver with integrated low dropout current sources and a high efficiency charge pump. The charge pump has 1×/1.5× fractional operation mode. The SGM3122 is designed for LCD display backlight applications.
The supply voltage operates from 2.7V to 5.5V and is well suited for various applications powered by a 1-cell Li-Ion battery, as well as 3-cell or 4-cell NiCd, NiMH or Alkaline batteries.
The ISET reference current is set through an external resistor on the ISET pin. The SGM3122 supports up to 4 LED strings for total maximum 120mA current. In...