This flyback converter calculator relates the output voltage, input voltage, duty cycle, and transformer turns ratio of a flyback SMPS. Enter the known values above.
Formula
Vout = Vin × (D ÷ (1 − D)) × (Ns ÷ Np)
Example
Vin = 100 V, D = 0.4, Ns/Np = 1: Vout = 100 × (0.4 ÷ 0.6) = 66.7 V.
Related calculators
Frequently Asked Questions
How do I calculate flyback output voltage?
Multiply the input voltage by D/(1-D) and by the secondary-to-primary turns ratio.
What sets flyback output voltage?
The duty cycle and the transformer turns ratio together set the output for a given input.
What is the duty cycle in a flyback?
The fraction of each switching cycle the primary switch is on, storing energy in the transformer.