SP1938 Description
The SP1938 is a step-up DC/DC converter for white LED driver with over voltage protection. The device can driver one to four LEDs in series from a single cell Lithium Ion battery. Internal functions include current limiting;.
SP1938 Key Features
- Current Source with Over Voltage Protection
- Fast 0.8MHz Switching Frequency
- High Efficiency up to 87%
- Drives up to Four LEDs From 3.2V Supply
- Drives up to Six LEDs From a 5V Supply
- Low Quiescent Current
- Disconnects LEDs in Shutdown Mode
- Internal Over Temperature and Current Limiting
- Internal Soft-Start Circuit
- 26V Rugged Bipolar Switch