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LR745 - High Input Voltage SMPS Start-up

Description

The Supertex LR745 is a high input voltage SMPS startup circuit.

The LR745 is ideally suited for use with industry standard low voltage PWM ICs having start thresholds of 13.9 - 18.0V.

Features

  • Accepts inputs from 35V to 450V.
  • Output current limiting.
  • For PWM ICs with start-up threshold voltage of 13.9 - 18.0V.
  • Very low power consumption after start-up.

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Datasheet Details

Part number LR745
Manufacturer Supertex Inc
File Size 433.89 KB
Description High Input Voltage SMPS Start-up
Datasheet download datasheet LR745 Datasheet

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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LR745 High Input Voltage SMPS Start-up Features ► Accepts inputs from 35V to 450V ► Output current limiting ► For PWM ICs with start-up threshold voltage of 13.9 - 18.0V ► Very low power consumption after start-up Applications ► Notebook and laptop computers ► Telecommunication power supplies ► Battery chargers ► Motor controllers General Description The Supertex LR745 is a high input voltage SMPS startup circuit. The LR745 is ideally suited for use with industry standard low voltage PWM ICs having start thresholds of 13.9 - 18.0V. It allows the PWM ICs to be operated from rectified 120 or 240VAC lines, and eliminates the use of power resistors often used for this purpose.