UCC28250: Pre bias operation

User1223

Part Number: UCC28250

Hı team i did not understand some things in pre biased operation

For example

1-) Is it necessary to apply voltage to the pre bias outputs along with the input voltage to start the controller? Cant the controller work without an pre biased voltage?

Thanks

over 1 year ago

0 Hong Huang over 1 year ago

TI__Guru 54105 points

Hi,

The controller works without prebias. If your design doesn't have this requirement then you can ignore all prebias related content.

UCC28250 has a feature to allow Vout prebias so that at startup, the prebias will not be discharged.

+1 User1223 over 1 year ago in reply to Hong Huang

Prodigy 30 points

Hı , what are the pre bias related contents in the sch?

I don't know whether this process should happen or not. When I look at the schematics, I see that a diode is connected to the output line. What is the function of this diode here? Should we source the diode when there is an active output?

Thanks

+1 Hong Huang over 1 year ago in reply to User1223

TI__Guru 54105 points

Hi,

Which diode, what schematics, and where is that diode in the schematics?

0 User1223 over 1 year ago in reply to Hong Huang

Prodigy 30 points

Hi Hong ,

the problem is solwed thanks.

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UCC28250: Pre bias operation