This week I started to construct the buck boost circuit in Proteus. I decided to use MOSFET instead of transistor for switching purpose. I also put volt and amp meter for input and output display. However, the circuit only manage to buck from 0.5V to 11.25V as I increase the Rv; the duty cycle D also increase. It cannot boost the output at all. Supposedly, when the duty cycle is more than 0.5, it should boost the output more than the input. Maybe the value for inductor need to be changed. Furthermore, the output is in negative value.
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