Hi, anyone knows why my switching losses of my boost converter is too high?
i have a boost converter that its output voltage should be regulated at 388VDC.
However, my circuit works with very low efficiency, when my load is 70W, and i put in input voltage of 80W, there is no voltage regulation. In fact, the output votlage dropped to 288VDC.
input voltage was 80W and output voltage was 40W, which means the remaining 40W was switching losses. I am wondering why? The voltage feedback loop is working fine.
The boost topology has this formula, Vout/Vin=1/(1-D)
However when the Duty cycle is too high, out Vout will saturate at a point. so when the output voltage saturates, will it cause high switching losses?