LT3573

PRODUCTION

Isolated Flyback Converter without an Opto-Coupler

Data Sheet Product Selection Table
Part Models
4
1ku List Price
Starting From $3.32
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Part Details

  • 3V to 40V Input Voltage Range
  • 1.25A, 60V Integrated NPN Power Switch
  • Boundary Mode Operation
  • No Transformer Third Winding or Opto-Isolator Required for Regulation
  • Improved Primary-Side Winding Feedback Load Regulation
  • VOUT Set with Two External Resistors
  • BIAS Pin for Internal Bias Supply and Power NPN Driver
  • Programmable Soft-Start
  • Programmable Power Switch Current Limit
  • Thermally Enhanced 16-Lead MSOP
LT3573
Isolated Flyback Converter without an Opto-Coupler
5V Isolated Flyback Converter Load Regulation Product Package 1
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 1

Design Note 2

Technical Articles 3

Data Sheet

This is the most up-to-date revision of the Data Sheet.

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Hardware Ecosystem

Parts Product Life Cycle Description
Isolated µModule Converters 2
LTM8048
RECOMMENDED FOR NEW DESIGNS 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter with LDO Post Regulator
LTM8047
RECOMMENDED FOR NEW DESIGNS 3.1VIN to 32VIN Isolated μModule (Power Module) DC/DC Converter
Surge Stopper, Overvoltage, and Overcurrent Protection 1
LT4363
RECOMMENDED FOR NEW DESIGNS High Voltage Surge Stopper with Current Limit
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Tools & Simulations

LTspice 2

Models for the following parts are available in LTspice:

  • LT3573
LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

eval board
schematic 1
DC1228A

LT3573EMSE | 10V to 30 VIN, 5 VOUT at 1A Isolated Monolithic Flyback Converter

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Product Details

Demonstration circuit 1228A is an isolated flyback converter featuring the LT3573. This demo circuit is designed for a 5.0V output from a 10V to 30V input. The maximum output current is 1A when the input voltage is higher than 20V. No third winding or opto-isolator is required for regulation. The part senses the isolated output voltage directly from the primary-side flyback waveform. The LT3573 operates with input supply voltages from 3V to 40V, and can deliver an output power up to 7W with no external power devices. The LT3573 utilizes boundary mode operation to provide a small magnetic solution with improved load regulation.


 
DC1228A
LT3573EMSE | 10V to 30 VIN, 5 VOUT at 1A Isolated Monolithic Flyback Converter
DC1228A - Schematic

Latest Discussions

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output not getting
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