UCC28910: UCC28910 Flyback design considerations

Anand Matta

Prodigy 130 points

Part Number: UCC28910

Tool/software:

Dear TI Team,

I am reviewing the PMP11064 evaluation board design and would like to clarify a few design considerations:

Flyback (UCC28910D):

What ripple current value was assumed during the primary inductance calculation?
My computed value for the primary inductance does not align with the design, hence I would like to understand the design basis.

Your inputs will help me reconcile my calculations with the reference design.

Best regards,
Anand

11 months ago

0 Mike O' 11 months ago

TI__Guru* 86286 points

Hello,

I could not find that design on ti.com. Could you send me a link to the reference design in question?

Regards,

0 Anand Matta 11 months ago in reply to Mike O'

Prodigy 130 points

3750.400 Watt Half Bridge LLC.pdf Sir, please find the attachment

0 Mike O' 11 months ago in reply to Anand Matta

TI__Guru* 86286 points

Hello,

Thanks for sharing the schematic. I will forward this inquiry to the designer of this reference design so that they can answer your questions for you.

Regards,

0 Anand Matta 10 months ago in reply to Mike O'

Prodigy 130 points

Hi,

Good Day. My post is about 18 days ago yet I haven't receive any response from your team. Please help to check. Thank you very much.

Best Regards,

Anand Matta

0 Sheng-yang Yu1 10 months ago

TI__Expert 4840 points

Anand,

Sorry for our late reply. I am not sure what ripple current you are referring to. Primary inductance of the Flyback transformer calculation is based on the section 10.2.1 in the datasheet. Have you tried to follow datasheet section 10.2.1 to design the transformer?

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UCC28910: UCC28910 Flyback design considerations