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LT3573 - Isolated Flyback Converter

General Description

The LT®3573 is a monolithic switching regulator specifically designed for the isolated flyback topology.

No third winding or opto-isolator is required for regulation.

The part senses the isolated output voltage directly from the primary-side flyback waveform.

Key Features

  • n 3V to 40V Input Voltage Range n 1.25A, 60V Integrated NPN Power Switch n Boundary Mode Operation n No Transformer Third Winding or Opto-Isolator Required for Regulation n Improved Primary-Side Winding Feedback Load Regulation n VOUT Set with Two External Resistors n BIAS Pin for Internal Bias Supply and Power NPN Driver n Programmable Soft-Start n Programmable Power Switch Current Limit n Thermally Enhanced 16-Lead MSOP.

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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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FEATURES n 3V to 40V Input Voltage Range n 1.25A, 60V Integrated NPN Power Switch n Boundary Mode Operation n No Transformer Third Winding or Opto-Isolator Required for Regulation n Improved Primary-Side Winding Feedback Load Regulation n VOUT Set with Two External Resistors n BIAS Pin for Internal Bias Supply and Power NPN Driver n Programmable Soft-Start n Programmable Power Switch Current Limit n Thermally Enhanced 16-Lead MSOP APPLICATIONS n Industrial, Automotive and Medical Isolated Power Supplies LT3573 Isolated Flyback Converter without an Opto-Coupler DESCRIPTION The LT®3573 is a monolithic switching regulator specifically designed for the isolated flyback topology. No third winding or opto-isolator is required for regulation.