I need help understanding how the PFC component works in the attached diagram (HRP-75_PSU.pdf)
The SMPS diagram is build up around a chip called TEA1751, containing flyback controller together with PFC regulation.
I've read the datasheet multiple times and i still dont get the concept.
The PFC component is made up using the following pins
VIN_Sense
PFC_AUX
PFC_DRIVER
VO_Sense
Here is what i understand and please correct me and fill in my gaps:
VIN_Sense acts as a reference, it senses the pulsating DC input. It makes up the voltage reference which the current has to phase allign with.
PFC_AUX senses when the input current is at a valley, in which case the inductor will be demagnetized. Whenever the inductor is demagnetized the PFC_driver will start sourcing in order to turn on the PFC mosfet.
Im not sure how the VO_Sense works
As you can tell i have a major gap in my understanding of this concept. and it would a tremendous help if somebody could explain to me how PFC works in this particular setup
The SMPS diagram is build up around a chip called TEA1751, containing flyback controller together with PFC regulation.
I've read the datasheet multiple times and i still dont get the concept.
The PFC component is made up using the following pins
VIN_Sense
PFC_AUX
PFC_DRIVER
VO_Sense
Here is what i understand and please correct me and fill in my gaps:
VIN_Sense acts as a reference, it senses the pulsating DC input. It makes up the voltage reference which the current has to phase allign with.
PFC_AUX senses when the input current is at a valley, in which case the inductor will be demagnetized. Whenever the inductor is demagnetized the PFC_driver will start sourcing in order to turn on the PFC mosfet.
Im not sure how the VO_Sense works
As you can tell i have a major gap in my understanding of this concept. and it would a tremendous help if somebody could explain to me how PFC works in this particular setup
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