Buck Boost Converter
Hi,
I am a newbie here and I wish someone is able to help me.
I want to design a Buck Boost converter with specification as below;
Output power = 75W
Output voltage = 24V (constant)
Input voltage variable range from 10V to 26V
Frequency = 20kHz
From here, I got the value for L and C by equation below;
L = (1-D)^2 R / 2f
C = D / R.f.Vr (Vr = ripple voltage in %)
Am I right to use these equation?
Furthermore, based on these equation, i got the L and C value. But when I simulate the circuit, the output is incorrect as I varied the input and duty cycle.
Anyone out there is able to let me know whats wrong with my circuit?
Thanks for your help.
edmond_chan85