flyback transformer power calculator

enter the value and click "calculate", the calculation result will be displayed.

enter a value:

power specifications

frequency:
KHz
time:
uS
diode voltage drop:
V
transistor voltage drop:
V
efficiency:
%
transistor maximum voltage:
V
AL=L/N2:
uH/Turns^2
primary voltage:
V
voltage output vop1:
V
current output iop1:
A
power p1:
W

secondary winding

voltage output vop2:
V
current output iop2:
A
power p2:
W
voltage output vop3
V
current output iop3:
A
power p3:
W
voltage output vop4:
V
current output iop4:
A
power p4:
W

transformer results:

power input pin:
W
primary to secondary turns ratio n1:
charging time tcp:
uS
discharge time tdp:
uS
dead time period td:
uS
primary inductor:
uH
primary coil np:
Turns
secondary coil ns1:
Turns
secondary coil ns2:
Turns
secondary coil ns3:
Turns
secondary coil ns4:
Turns
peak primary current:
A
primary rms current:
A
primary wire diameter:
mils
primary wire gauge:
mils
what is a flyback power transformer

flyback power transformer is a transformer used for dc power supply. it generates high-frequency pulses by periodically cutting off the input power supply, and then converts the required voltage to the output through a transformer. this type of transformer is commonly used in electronic equipment such as computers, televisions, and mobile phones.

when calculating the flyback power transformer, we need to consider the following key parameters: input voltage (vin), output voltage (vout), input current (iin), output current (iout), transformation ratio (n) and conduction of the switching tube. on-time (ton) and off-time (toff), etc.

we need to determine the transformation ratio of the transformer. the transformation ratio refers to the ratio of input voltage to output voltage, usually represented by n. the calculation formula of the transformation ratio is:

N=Vout/Vin

next, we need to calculate the relationship between the input current and the output current. according to the law of conservation of energy, input power is equal to output power. the power calculation formula is:

Pin = Vin * Iin

Pout = Vout * Iout
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