LT1725, 36V-72V Input to 3.3V at 3.5A Output, Isolated Synchronous Flyback Converter

Reference Design using part LTC4257 by Analog Devices

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Manufacturer

Analog Devices
  • Application Category
    Power Supplies
  • Product Type
    DC to DC Single Output Power Supplies

For End Products

  • Personal Digital Assistant
  • PoE Wireless Access Point
  • VoIP Telephone

Description

  • Circuit shows LT1725 switching regulator controller greatly simplifies the design of PoE supplies, isolated flyback topology, provide 3.3V at 3.5Afrom an input of 37V to 54V

Key Features

  • Conversion Type
    DC to DC
  • Input Voltage
    37 to 54 V
  • Output Voltage
    3.3 V
  • Output Current
    3.5 A
  • Output Power
    11.5 W
  • Efficiency
    90 %
  • Topology
    Flyback

Featured Parts (24)

Featured Parts
Part Number Manufacturer Type Description
LT1725IGN#TR Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N T/R Buy
LT1725CGN#TR Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N T/R Buy
LT1725CS Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SOIC N Buy
LT1725CS#TRPBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SOIC N T/R Buy
LT1725CGN#PBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N Tube Buy
LT1725CGN Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N Buy
LT1725IS#TRPBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SOIC N T/R Buy
LT1725IGN#PBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N Tube Buy
LT1725IGN#TRPBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N T/R Buy
LT1725CS#PBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SOIC N Tube Buy
LT1725IGN Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SSOP N Buy
LT1725IS#PBF Analog Devices PWM and Resonant Controllers Current Mode PWM Controller 90kHz to 115kHz 16-Pin SOIC N Tube Buy
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