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New type of PFC

cupoftea

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Hi,
Today we received in the post a PFC of 150W which is not Average current mode or Boundary conduction mode.
It doesnt use inductors in the normal way.
When you have a series inductor, you can , in some ways, use a paralellel capacitor instead, kind of thing.
Our customer sent it to us, wants us to build a product out of it for a streetlight.
It uses capacitor charge principle.
Is very efficienct with great light load power.
We are thinking of buying some.
What do you think?


 

scopeprobe

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Hi,
Today we received in the post a PFC of 150W which is not Average current mode or Boundary conduction mode.
It doesnt use inductors in the normal way.
When you have a series inductor, you can , in some ways, use a paralellel capacitor instead, kind of thing.
Our customer sent it to us, wants us to build a product out of it for a streetlight.
It uses capacitor charge principle.
Is very efficienct with great light load power.
We are thinking of buying some.
What do you think?



Perhaps i'm missing something but looks like a glorified Buck converter to me. If i understand Figure 1C of their datasheet correctly they are effectively regulating the voltage on Cs with repect to HVDC. They appear to use Ld & Lhvdc to manage the ripple current & use Lch for high frequency switching. I don't see anythinng special.

https://www.ti.com/seclit/ml/slup264/slup264.pdf
 

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