How can we correct the power factor of two switch non-inverting buck-boost converter? because in boost mode it is easily corrected but in buck mode input current is discontinuous ?
If you want a very continous DC supply current, I would use an LC filter in the DC supply.
Dear Sir
where to put LC filter, and one more thing after placing filter where we will have to sense the rectified voltage for preparation of reference current ?
Dear Ankit,
The LC-filter will only smooth the high-frequency current ripple caused by the discontinuous current input of the buck/boost. However, the control of the DCDC needs to follow the desired sinusoidal voltage shape in order to lead to a sinusoidal current at the input. Be aware that the LC-filter may add some difficulties in ensuring control loop stability since it becomes a part of the control loop.