PFC controllers don't allow independent Output overvoltage level setting

[ocset]

Hello,
Do you know why virtually all PFC  controllers give you no choice over the output overvoltage threshold level?
I mean, take the PFS7623H PFC controller …
https://led-driver.power.com/design-support/product-documents/data-sheets/hiperpfs-4-data-sheet/

….This (its error amplifier) has a feedback reference of 3.85V…..and the feedback signal is also internally connected to an Overvoltage comparator with a reference voltage of 4-4.1V. Being internally connected means you cannot adjust it.

This means that with a  200W PFC stage, one must have a PFC output capacitance of at least 150uF  so that you don’t keep tripping the OVP with normal  100/120Hz  output ripple voltage.
This is extremely inconvenient for people who want to use all Film capacitors at the PFC output.
I can only find one  PFC controller  on the market that allows one to independently  set the output overvoltage level (the LT1248).

Needless to say, digikey etc  unfortunately don’t allow one to sort PFC controllers  on “independent OVP setting”.

[T3sl4co1l]

Commercial products designed for commercial applications? Say it ain't so!

Can always multiply the capacitor with a synchronous boost; this was done, with GaN FETs and Cera-Link(R) capacitors, in the winning Google Little Box competition from some years ago.

Tim