UCC21220: Shortcut prim transformer????

Laurent van Poppelen69

Expert 1020 points

Part Number: UCC21220

Hi,

Am I completely wrong or are both prim. coils shortcut!!!!

rgds,

Laurent van Poppelen

over 2 years ago

0 Krystian Plaskota over 2 years ago

TI__Expert 4065 points

Hi Laurent,

Yes those are being shorted. Are there any issues on the gate driver side?

0 Laurent van Poppelen69 over 2 years ago in reply to Krystian Plaskota

Expert 1020 points

No, I ran across this design and, I wonder the principle of this power transfer! Could you provide a link to the document explaining it?

regards,

Laurent van Poppelen

0 Krystian Plaskota over 2 years ago in reply to Laurent van Poppelen69

TI__Expert 4065 points

Hi Laurent,

I haven't seen this design before and I know nothing about it, where did you find this?

0 Laurent van Poppelen69 over 2 years ago in reply to Krystian Plaskota

Expert 1020 points

Hi Krystian,

just follow the link at the top of this page:

0 Krystian Plaskota over 2 years ago in reply to Laurent van Poppelen69

TI__Expert 4065 points

I see, that schematic must have been from the customer or the poster, back when I responded to that thread I didn't notice that short you pointed out. After reading the top post you can see their system is a dual active bridge converter. We have a reference design for implementing our gate driver in a dual active bridge converter here: https://www.ti.com/lit/ug/tidues0c/tidues0c.pdf

I hope this helps.

Regards,

Krystian

0 Laurent van Poppelen69 over 2 years ago in reply to Krystian Plaskota

Expert 1020 points

I know the tudues0c.pdf! But can you agree/confirm that the schematic, with the 'shorts' would not work? If so, my issue is resolved!

Regards,

Laurent

+1 Krystian Plaskota over 2 years ago in reply to Laurent van Poppelen69

TI__Expert 4065 points

Hi Laurent,

That connection on the primary looks like a mistake to me, the coils of the transformer are being shorted so I can't imagine this system working as it should.

Power management

Power management forum

UCC21220: Shortcut prim transformer????