Flyback Transformer Design Example

Designing isolated flyback converter circuits.

Flyback transformer design example.

Determine operation mode determine an operation mode. The frequency is to be 50 khz with a 50 on period for q1 10µs. The example assumes 100 efficiency and zero diode drop. Here s the schematic from chapter 6 including the equivalent circuit model of the transformer consisting of a magnetizing inductance referred to the primary side in an ideal transformer.

Design of transformer for fly back step 0. In this design it is just a place holder and the design has not been optimized for emi. The input voltage is 100v. This inductor has a dcr of 6 5 ohms.

For this transformer design example we ll assume an output power requirement of 100w. 470uh inductor from bourns was chosen part number rlb0608 471kl. If you want to operate it in continuous current m ode under a desired condition select the continuous current mode sheet. Transformer design calculating numerical values design method of pwm ac dc flyback converters of the required transformer design steps for a flyback converter we begin with the calculation of the numerical values necessary for the design of the transformer based on power supply specifications.

Fly back transformer design july 2016 dt fly back transformer an 174e rev1 0 4 8 7. Let s consider a second example a continuous conduction mode flyback transformer. This is basically a to mining coupled inductor. A gapped ferrite core with a pole area of 100mm 2 is to be used.