Datasheet Summary
DC-DC Step-Up Converter for White LED
DESCRIPTION The SP1937 is a step-up DC/DC converter for white LED driver with constant current. The device can driver one to four LEDs in series from a single cell Lithium Ion battery. Internal functions include current limiting; thermal shutdown and soft-start to prevent damage operate status. The SP1937 DC/DC converter operates at 1.2MHz and low output capacitor as small as 0.22uF; apply to Lithium-Ion powered systems. A low 95mV (Typ) reference voltage minimizes power loss in the current setting resistor for better efficiency.
APPLICATIONS
- Battery Power Equipment
- Notebook puters
- PDA
- Cellular Phone
- Digital Cameras
- MP3 Players
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