SGM3131 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.
SGM3131 Key Features
- Input Voltage Range: 2.7V to 5.5V
- Support up to 4 LEDs at 30mA Each
- 16-Step LED Brightness Control Through One-Wire
- 1× and 1.5× Charge Pump for High Conversion
- Switching Frequency: 1MHz
- 1% Regulated LED Current Matching
- Built-in Soft-Start for Reducing Inrush Current
- Low Input Ripple and Low EMI
- Protection Features
- Operating Temperature Range: -40℃ to +85℃
SGM3131 Applications
- Input Voltage Range: 2.7V to 5.5V
- Support up to 4 LEDs at 30mA Each