– Inherently Matched LED Current
– High Efficiency: 84% Typical
– Drives Up to 27 LED LEDs from a 5V Supply
– 36V Rugged Bipolar Switch
– Fast 1.2MHz Switching Frequency
– Uses Tiny 1mm Tall Inductors
– Moisture Sensitivity Level 3
The LM1938 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current.The device can drive two, three or 27 LEDs from a 5V supply.Additional feature include output voltage limiting when LEDs are disconnected.