ST1938 - DC-DC Step-Up Converter
The ST1938 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; thermal shutdown; OVP and soft-start to prevent damage operate status.
The
ST1938 Features
* z Current Source with Over Voltage Protection z Fast 0.8MHz Switching Frequency z High Efficiency up to 87% z Drives up to Four LEDs From 3.2V Supply z Drives up to Six LEDs From a 5V Supply z Low Quiescent Current z Disconnects LEDs i
