Mô tả
FEATURES
- 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
DESCRIPTION
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.
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