Switch Mode Power Transformers


Application Notes > Custom Transformers > Switch Mode Power Transformers
A switched-mode power supply (also switching-mode power supply, SMPS, or simply switcher) is an electronic power supply unit that incorporates a switching regulator in order to provide the required output voltage. The switch mode transformer is used in conjunction with the switching regulator to form a switch mode power supply.
Switch Mode Power Transformer Design
  • Typical minimum requirements to be specified for a Switch Mode Power Transformer are:
      • Circuit Topology: Flyback, Feed Forward or Blocking Oscillator
      • Power Rating in VA
      • Input Voltage in volts
      • Peak Input Current in Amps
      • Operating Frequency in kHz
      • Secondary Voltage in volts
      • Secondary Current in Amps

Gowanda designs and manufactures switching mode power transformers and inductors for buck, flyback, boost and inverter applications in a wide variety of shapes and sizes. This includes various standard types of core with bobbin structures (E, EP, EFD, PQ, POT, U and others), toroids and some custom designs. Our upper limits are 40 pounds of weight and 2 kilowatts of power. Our capabilities include foil windings, litz wire windings and perfect layering. For toroid transformers the list includes sector winding, progressive winding, bank winding and progressive bank winding. Gowanda has a variety of winding machines, including programmable automated machines and a taping machine for toroids. Gowanda has vacuum chambers for vacuum impregnation and can also encapsulate. To ensure quality, Gowanda utilizes programmable automated testing machines. Most of our production is 100% tested on these machines.


Switch mode power transformers are used extensively in electronic applications, usually within a switch mode power supply.

      • Computer power supplies
      • Cell phone charging units
      • Lighting applications
      • Laser power supply