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LM1937 - White LED Step-Up Converter

General Description

The LM1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current.

The device can drive two, three or four LEDs in series from a Li-Ion cell.

Key Features

  • Inherently Matched LED Current.
  • High Efficiency : 84% Typical.
  • Drives Up to 4 LEDs from a 3.2V Supply.
  • Drives Up to 6 LEDs from a 5V Supply.
  • Power Management IC.
  • 36V Rugged Bipolar Switch.
  • Fast 1.2MHz Switching Frequency.
  • Uses Tiny 1mm Tall Inductors.
  • Requires Only 0.22µF Output Capacitor.
  • Moisture Sensitivity Level 3.

📥 Download Datasheet

Datasheet Details

Part number LM1937
Manufacturer HTC KOREA
File Size 254.80 KB
Description White LED Step-Up Converter
Datasheet download datasheet LM1937 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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White LED Step-Up Converter FEATURES  Inherently Matched LED Current  High Efficiency : 84% Typical  Drives Up to 4 LEDs from a 3.2V Supply  Drives Up to 6 LEDs from a 5V Supply  Power Management IC  36V Rugged Bipolar Switch  Fast 1.2MHz Switching Frequency  Uses Tiny 1mm Tall Inductors  Requires Only 0.22µF Output Capacitor  Moisture Sensitivity Level 3 APPLICATION  Cellular Phones  PDAs, Handheld Computers  Digital Cameras  MP3 Players  GPS Receivers LM1937 SOT-23 5L PKG ORDERING INFORMATION Device LM1937SF5 Package SOT-23 5L DESCRIPTION The LM1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion cell.