UCC28780: UCC28780 OCP Protection

user5781628

Intellectual 970 points

Part Number: UCC28780

Hi,

There is OPP, PCL for current protection.

The Vcst(opp) range is 0.425V to 0.6V, and PCL value is set to 0.8V.

Could you help explain what is the difference between OPP and PCL?

If the full power is 65W, and the OPP is 78W. When we put a 130W at the output for 10ms, how is the reaction of the current sense voltage Vcst? 0.8V or OPP threshold?

When it will trigger PCL?

Thanks!

Eleven Chen

over 5 years ago

0 Mike O' over 5 years ago

TI__Guru 66135 points

Hello BR,

I am reviewing your questions and will be able to provide feedback soon.

Regards,

Mike

0 Mike O' over 5 years ago in reply to Mike O'

TI__Guru 66135 points

Explanation of OPP and PCL.pdf

0 user5781628 over 5 years ago in reply to Mike O'

Intellectual 970 points

Hi Mike,
Thanks for your clarification.
I still can't understand that:
If the rated power is 65W, and the OPP set point is 78W. After we put a 130W at the output for 10ms when the converter works at 65W , how is the reaction of the current sense voltage Vcst? 0.8V or OPP threshold?

BR
Eleven Chen

0 Mike O' over 5 years ago in reply to user5781628

TI__Guru 66135 points

Eleven Reply 2.pdf

Power management

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UCC28780: UCC28780 OCP Protection