UCC28070: How to test loop current gain and phase

user6004348

Intellectual 390 points

Part Number: UCC28070

HI sir

If I want to test Figure 6. Current Loop Gain (TdB (f)) and Figure 7. Current Loop Phase (qc (f)) in SLUA479A

The Schematic(page 2) in SLUA479A ,How to point cconnection

TKS

UCC28070 Design Review 300W Interleaved PFC- slua479.pdf

over 5 years ago

0 David Huang33 over 5 years ago

TI__Genius 9140 points

you can insert the signal in the attached.

0 user6004348 over 5 years ago in reply to David Huang33

Intellectual 390 points

HI David

Follow your suggestions，I actually tested it, please refer to the attachment for the results

TKSUCC28070EVM current loop gain and phase measurement.docx

0 user6004348 over 5 years ago in reply to user6004348

Intellectual 390 points

HI Davin

reminder

0 user6004348 over 5 years ago in reply to user6004348

Intellectual 390 points

Can other TI engineers reply?

0 David Huang33 over 5 years ago in reply to user6004348

TI__Genius 9140 points

sorry for the delay response. there is no any email remind for me.

I look through your test report.

for UCC28070, because the controller needs to sampling the Vinac, using DC input should not be able to work correctly. let me double check with the author and feedback to you.

0 David Huang33 over 5 years ago in reply to David Huang33

TI__Genius 9140 points

Hi user6004348:

I see my colleague repled to you in a new post also on this topic. does his reply answers your question?

if yes, please allow me to close this post.

thanks.

https://e2e.ti.com/support/power-management/f/196/p/904751/3345992?tisearch=e2e-sitesearch&keymatch=UCC28070%2520%2520current%2520loop#3345992

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UCC28070: How to test loop current gain and phase