DC-DC Step-Up Converter
ST1938
DC-DC Step-Up Converter for White LED Driver
DESCRIPTION The ST1938 is a step-up DC/DC converter for white LED d...
Description
ST1938
DC-DC Step-Up Converter for White LED Driver
DESCRIPTION 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 operates at 0.8MHz and from low input voltages as low as 1.5V; apply to Lithium-Ion powered systems. A low 95mV reference voltage minimizes power loss in the current setting resistor for better efficiency. The ST1938 is available in small package SOT-23-6L
PIN CONFIGURATION SOT23-6L
APPLICATIONS
z Battery Power Equipment z Notebook Computers z PDA z Cellular Phone
PART MARKING
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...
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