UCC28070: Current waveform shape

Aswathy Kanth

Part Number: UCC28070

Hi,

Thanks for the response. Please see attached input current & voltage waveform of my PFC. As you can see, there is a current spike in every cycle. What might be the reason for it?

Thanks & Regards,

Aswathy

over 4 years ago

0 John Griffin1 over 4 years ago

TI__Mastermind 34465 points

Hello Aswathy,

Do you have a schematic and any test information for this pfc ?

Regards

John

0 Aswathy Kanth over 4 years ago in reply to John Griffin1

Intellectual 700 points

Test information

Input:230Vac, 50Hz

Load: 4.4kW resistive

Green w/f: Input sine voltage

Yellow w/f: Input pfc current

circuit diagram attached

0 Aswathy Kanth over 4 years ago in reply to Aswathy Kanth

Intellectual 700 points

pfc output capacitance value is = 7.32mF (not shown in the circuit attached)

0 John Griffin1 over 4 years ago in reply to Aswathy Kanth

TI__Mastermind 34465 points

Hello Aswathy Kanth

It is impossible to read this schematic.
Have you used the Excel calculator for this design ?
Please attach the calculator results and a clear copy of the schematic with component values used.

Regards

John

0 John Griffin1 over 4 years ago in reply to John Griffin1

TI__Mastermind 34465 points

I am going to close this post since there has been no response.

Please open a new post if you have any other issue.

Regards

John

0 Aswathy Kanth over 4 years ago in reply to John Griffin1

Intellectual 700 points

Hi,

This issue is resolved. I received support from TI through the mail. Thanks for your consideration & support

Regards,

Aswathy

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UCC28070: Current waveform shape