Part Number: PMP8787 Other Parts Discussed in Thread: UCC28700 the file mentions this design sues high efficiency with the quasi-resonant mode, are all the plots in the test results using this mode?
We'd need to be able to have the input be a half-wave…
Hi Rafeeq
Oops - I neglected to answer that part of your post - Transformer inductance is the magnetizing inductance of the primary winding of the transformer. It's not very clear but the term "Inductance" is the inductance of the output inductor. …
Hi Henk
The short answer to your question is - YES - here's a markup of the schematic showing where the output of the Flyback goes. BTW - I'd suggest you use the UCC28951 instead of the UCC28950
The UCC28951 device is an enhanced version of the UCC28950…
Hello Kaji-san
You are correct the VREF of the UCC28070 isn't really strong enough to supply current to the ISO7710 device. It has a maximum rating of 2mA and we recommend that the current be kept below 500uA. This is enough to feed the potential divider…
Hello Harini
Regarding your earlier post - I added the potential divider from CS to GND rather than VREF to GND as shown below. Both connections will affect the delay times but the one to CS will give a delay which is inversely proportional to the current…
Hi Sir / Madam ,
This is vengad here from Avnet India , I am doing the AC/ DC Adopter design based on PMP8787 Ref-design for one of my customer . can you please share the PMP878 ( Flyback RLTI-1084 Renco Electronics) Transformer detals ?
regards/…
Other Parts Discussed in Thread: UCC28951 , LM5046 , LM5045 , UCC25600 , UCC28950 , UCC27714 , PMP8787 , UCC28700 , UCC21520 , UCC3895 Hi,
I am designing one High power density isolated DC DC converter with following specification.
Input voltage …
Hi Andy
This is a 1.1kW application so an interleaved boost PFC is a good choice and the UCC28070-Q1 would be the best controller for the application. If the automotive qual were not needed then they could consider the UCC28180 single phase CCM PFC…
