UCC27531: Little error in the datasheet

Hi David,

Welcome to e2e and thanks for your help with this datasheet error. Im an apps engineer and will solve this for you.

I cant find this figure in the UCC27531 datasheet, do you know what datasheet this figure came from?

Thanks,

Hi Jeffrey,

I found it in the third page of this application note.

My mistake, it wasn't in the datasheet, it was in the application note.

Regards and thanks for the welcome!

Hi David,

Thanks for the update, I see this figure now but I dont understand what you mean exactly.

Can you explain how the turn off FET charge from the parasitic FET capacitance would be considered an inductive charge?

During mosfet turn off the drain current reduces by charging Cds to the bus voltage during the miller plateau. This trait is intrinsic to a capacitor where the voltage lags the current.

Thanks,

Hi Jeff,

I have upload an one page document explaining how I understand the switch-off transient should be.

I hope my handwriting is clear enough.

Thanks again for this technical discussion and help,

David,

UCC27531_Switch_off_explanation.pdf