Datasheet Summary
White LED Step-Up Converter
Features
- Inherently Matched LED Current
- Drives Up to 27 LEDs from a 5V Supply
- 36V Rugged Bipolar Switch
- Fast 1.3MHz Switching Frequency
- Variable Dead-Time Provides Control over Total Range
- VOVP(MAX) = 29V
- Moisture Sensitivity Level 3
- Available in SOT-23-6 Package
APPLICATION
- Cellular Phones
- PDAs, Handheld puters
- 36V Rugged Bipolar Switch
- MP3 Players
- GPS Receivers
SOT-23-6L
DESCRIPTION
The LM1938 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive up to 27 LEDs from a 5V supply. Additional feature include output voltage limiting when LEDs are disconnected.
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