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In a two-switch flyback topology, a high-side power MOSFET – placed between the input voltage rail and the transformer – and snubber diode are added to help overcome the limitations of conventional flyback topology as the overall voltage stress is equally split between the two transistors. This is particularly valuable in high-voltage applications such as auxiliary power supplies supplied by a three-phase input rail. A dual-switch flyback topology also removes clamping losses by recycling the leakage energy to the input side via the two diodes, thus boosting efficiency and reducing thermal stress while clamping the maximum voltage stress of the power MOSFET to the input voltage.

We offer a range of controllers supporting quasi-resonant mode, power MOSFETs, diodes and protection devices as well as a range of hardware and software development and evaluation tools to help design high-efficiency two transistor flyback AC-DC converters.

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      ST Diode Finder

      Active

      Diode product finder application for Android and iOS

      Finders Apps ST

      ST Voltage Regulator Finder

      Active

      Linear and switching voltage regulators and voltage reference applications for smartphones and tablets

      Finders Apps ST

      STPOWER MOSFET Finder

      Active

      STPOWER MOSFET finder mobile app for tablets and smartphones

      Finders Apps ST
      ST Diode Finder

      Description:

      Diode product finder application for Android and iOS
      ST Voltage Regulator Finder

      Description:

      Linear and switching voltage regulators and voltage reference applications for smartphones and tablets
      STPOWER MOSFET Finder

      Description:

      STPOWER MOSFET finder mobile app for tablets and smartphones

eDesignSuite

Converter

Input

V This option is required. And must be less than or equal to Volt. Max [V]
V This option is required. And must be greater than or equal to Volt. Min [V]

Output

V This option is required and must be a number.
A This option is required and must be a number.