the output of ( current and the voltage ) always change that is depend on the R load
the value of L is 170uH AND I ALSO CHANGED the L BUT still the SAME PROLEM
MAYBE I MUST USE PID FEEDBACK ?
MY REGARDS
Yes. Your circuit topology changes it's operation mode from continuous conducting (CCM) to discontinuous (DCM) below a certain load level. In DCM the output voltage is directly load dependant (both for buck and boost operation) and must be stabilized with a feedback controller. Also in CCM, the output voltage varies due to diode and transistor voltage drops, but the stability might be sufficient for very basic applications.
Thanks for replay
so please what type of feedback i have to use(PID or anther type )
i need the satiable one for my circuit ( four switch non-inverting buck boost converter)
my best regards ..