PMP4478: PMP4478 design Transformer details needed

Nandakumar lakkoju

Intellectual 405 points

Part Number: PMP4478
Other Parts Discussed in Thread: UCC24636, UCC28704, PMP15002

hi , i am looking for transformer datasheets and drawing details .

pls share .

Part # BCK2001-190 . used in PMP4478 .

regards

nanda kumar L

over 8 years ago

0 John Stevens over 8 years ago

TI__Expert 7395 points

Nanda,

Thank you for your interest in TI. I have contacted the team that did PMP4478 to see if they can provide the transformer information. You may also be interested in a newer even higher performance 5V, 3A design using UCC28704 and UCC24636 called PMP15002 here:

Regards,

John

0 Yingyang Ou over 8 years ago

TI__Prodigy 605 points

Nanda, the tranformer was customized and it is based on WE 150-2124 bobbin. The turn rating is 1-2/77 turns, 4-5/10 turns, 9-10/5 turns. Thanks!

0 Nandakumar lakkoju over 8 years ago in reply to Yingyang Ou

Intellectual 405 points

Thank u Yingyang for the details shared ..

0 Nandakumar lakkoju over 8 years ago in reply to John Stevens

Intellectual 405 points

John , thanks for sharing PMP15002 . will check it out .

0 Yingyang Ou over 8 years ago in reply to Nandakumar lakkoju

TI__Prodigy 605 points

Attach the transformer specs for your reference. Thanks!

750343720r00 Prelim Spec Sheet.pdf

0 Nandakumar lakkoju over 8 years ago in reply to Yingyang Ou

Intellectual 405 points

Hi Ying , Thanks for the details . is this same used in PMP4478 reference ? pls confrim

0 Yingyang Ou over 8 years ago in reply to Nandakumar lakkoju

TI__Prodigy 605 points

Yes, it is.

0 Ram Kumar over 8 years ago in reply to Yingyang Ou

Prodigy 235 points

Hi,

can we get the

1)Inductance value of Primary and secondary.

2)Wire sizes and Number of wires on each winding.

0 Yingyang Ou over 8 years ago in reply to Ram Kumar

TI__Prodigy 605 points

Hi, Ram,

We always use the primary inductance Lp for calculation. It is 650uH for this transfromer. We don't need the secondary inductance value.

For wire size, primary windings employ about 0.2mm Diameter (AWG 32) wire and secondary windings use 0.4mm diameter (AWG 26) wire. We use three wires in parallel on secondary.

Turn ratio is 77:10:5. Thanks!

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PMP4478: PMP4478 design Transformer details needed