Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740-Q1 Hi,
I got some questions about UCC28740-Q1(Design reference PMP41009)
1. The recommended primary side ratio Nps of the transformer is 43.86, But this means a too much primary inductance…
Thanks for your reply.
And i wana know that dose the low duty ratio affect the stability of the control loop?
Can The resistances and capacitors be set the same as PMP41009 while I used a different optocoupler and adjustable shunt regulator than PMP41009…
Part Number: PMP41009 Why place a filter capacitor on the VS input even though specification states "Avoid placing a filter capacitor on this input which interferes with accurate sensing of this waveform"? Also, what noise effects are being considered…
Hi, Shilin,
It is possible to do the regulation without optocoupler. Below is the example to accomplish feedback through auxiliary winding(Vout), however, we can't directly add resistor on auxiliary winding rectifier voltage because there is no error…
I'm sorry for replying late, because in Japan, it was a long holiday during Golden Week.
As for the problem, I've solved it.
I will post a new thread if there is something I don't understand or want to ask.
Thank you.
Part Number: PMP41009 Other Parts Discussed in Thread: UCC28740-Q1 , PMP Could we provide 1pcs of sample about this reference design to customer? They will use UCC28740-Q1 in Motor Controller Unit.
Waiting for your reply
Part Number: PMP41009 Hello,
Can I get the details for the transformer used in the reference design? In BOM, there is no such part number is given.
Regards,
Darshan
Hi Raya,
Thank you for the query on UCC28740.
Yes this IC can be used for 650-1000V as required.
I can refer the following reference design which will be a good place to start:
1. https://www.ti.com/tool/PMP41009
2. https://www.ti.com/tool/TIDA-010000
…
Hi Ikenna,
The method which which show is a cascode solution which could potentially be used. I do not see the reference design/results online though.
You can refer PMP41009 schematic and the following app note for HV startup methods (both conventional…