PMP20657: Transformer details

M Sadafale

Prodigy 160 points

Part Number: PMP20657
Other Parts Discussed in Thread: UCC28950

Hi,

Looking for T2 Transformer details ... BOM and Schematic do not have any details.

Also "Excel Design Tool" for this design will help.

over 5 years ago

0 JohnFullilove over 5 years ago

TI__Expert 5120 points

Hi Mangesh,

PMP20657 contains custom transformers and inductors from Payton Planar. The part numbers are in the BOM. Please contact Jim Marinos at Payton, Jim@PaytonGroup.com

Best Regards,

J. Fullilove

0 M Sadafale over 5 years ago in reply to JohnFullilove

Prodigy 160 points

Even turns ratio is not known to TI?

What was Spec given to Payton for designing transformers?

0 JohnFullilove over 5 years ago in reply to M Sadafale

TI__Expert 5120 points

Mangesh, the owner for this Power design is currently on business travel and will get back to you. Please allow 1-2 business days for a reply to your follow up question.

Best Regards,

J. Fullilove

0 Ryan Manack over 5 years ago in reply to M Sadafale

TI__Intellectual 2610 points

Hi Mangesh,

Here are the specs that were provided to the vendor. Anymore information will have to come from the vendor directly.

Transformer:

Topology: Phase Shifted Full Bridge

Input: 36-60V, 48V,nominal

Output: 12V@42A

5-Turn primary, center-tapped secondary with two two-turn windings

300kHz operating frequency on primary. Secondary inductor sees 600kHz

500Vdc isolation (or smaller if it enables a smaller size)

Ambient temperature max 80-100degC

Heat-sinking and forced air cooling will be provided

Can you estimate the magnetizing and leakage inductances and provide us the values?

Inductor:

1uH, 42Adc, >58A saturation

Thanks,

Ryan

0 M Sadafale over 5 years ago in reply to Ryan Manack

Prodigy 160 points

Rayan,

Thanks for information

Can you share Excel calculator "SLUC222D.xls" for this Design?

Mangesh

0 Ryan Manack over 5 years ago in reply to M Sadafale

TI__Intellectual 2610 points

Hi Mangesh,

You can find it in the UCC28950 product page. Here it is for reference

Thanks,

Ryan

0 M Sadafale over 5 years ago in reply to Ryan Manack

Prodigy 160 points

Ryan,

I am asking for the calculation done for "PMP20657" not for UCC28950EVM.

Planing to design 48V to 12V @ 2kW DCDC.. want to to use PMP20657 as starting point.

Mangesh

0 Ryan Manack over 5 years ago in reply to M Sadafale

TI__Intellectual 2610 points

Hi Mangesh,

SLUC2223.xls was not used for this design. Power Stage Designer 4.0 was used. You can plug the values in there for a phase shifted full bridge. It is a free tool http://www.ti.com/tool/POWERSTAGE-DESIGNER

Thanks,
Ryan

0 M Sadafale over 5 years ago in reply to Ryan Manack

Prodigy 160 points

Ryan,

Thanks for info... I will check with "Power Stage Designer"

Mangesh

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PMP20657: Transformer details