Flyback Converter Calculator

Calculate transformer turns ratio, duty cycle, and primary inductance for flyback converters.

Rectified DC input voltage.
V
Desired output voltage.
V
Load power.
W
Converter switching frequency in kHz.
kHz
Maximum allowed duty cycle.

Results

Turns Ratio (Np/Ns)-
Primary Inductance-µH
Peak Primary Current-A
References: ON Semiconductor AN-4137; Pressman Switching Power Supply Design