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IS31LT3938 - HIGH VOLTAGE LED LIGHTING DRIVER

General Description

IS31LT3938 LED driver IC is a peak current detection buck converter which operates in constant off time mode.

It operates over a very wide input voltage supply range of 10VDC to 450VDC or 110VAC/220VAC.

Key Features

  • User configurable power sequencing levels.
  • 3% output current accuracy.
  • Over current, temperature protection and short circuit protection.
  • High efficiency (typical up to 95%).
  • Higher MOS drive capability.
  • Wide input voltage range: 10VDC~450VDC or 85VAC~ 265VAC.
  • Linear and PWM dimming.
  • Very few external components.

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Datasheet Details

Part number IS31LT3938
Manufacturer Lumissil
File Size 390.28 KB
Description HIGH VOLTAGE LED LIGHTING DRIVER
Datasheet download datasheet IS31LT3938 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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IS31LT3938 HIGH VOLTAGE LED LIGHTING DRIVER WITH THREE LEVEL POWER SEQUENCING May 2015 GENERAL DESCRIPTION IS31LT3938 LED driver IC is a peak current detection buck converter which operates in constant off time mode. It operates over a very wide input voltage supply range of 10VDC to 450VDC or 110VAC/220VAC. IS31LT3938 incorporates the special feature of three power sequencing levels by detecting OFF-ON cycles of the main power switch. When the switch is cycled within a 4 second period (typical) the device automatically switches the power level to the next step. As a result, the input and output power of the luminaire may be adjusted depending on the desired amount of illumination and/or power consumption.