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LM1938 - White LED Step-Up Converter

General 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.

Key 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 LM1938.

📥 Download Datasheet

Datasheet Details

Part number LM1938
Manufacturer HTC KOREA
File Size 453.21 KB
Description White LED Step-Up Converter
Datasheet download datasheet LM1938 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 • 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 LM1938 APPLICATION • Cellular Phones • PDAs, Handheld Computers • 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. ORDERING INFORMATION Device LM1938SF6 Package SOT-23-6L Apr. 2022 – R1.