Transformer for LM2587

silvio ardi

Intellectual 320 points

Other Parts Discussed in Thread: LM2587

I design a flyback with LM2587

I dont know how to choose transformer.

According to you is good "murata 78601/2C" ?

http://www.murata-ps.com/data/magnetics/kmp_786.pdf

I use webench for general design, and Power Stage Design for transformer

thanks

over 12 years ago

0 Marc Davis-Marsh over 12 years ago

TI__Genius 10095 points

There are books on magnetic design such as Wurths Trilogy of Magnetics.

Your best bet is to contact Wurth or Pulse or another Manufacturer and give them the specs provided by webbench or power stage designer and let them tell you what they have in their inventory.

For example Pulse has this line of transformers

http://ww2.pulseeng.com/products/datasheets/P598.pdf

Regards,

Marc

0 silvio ardi over 12 years ago in reply to Marc Davis-Marsh

Intellectual 320 points

webench dosent give me some detail about inductor.
is possible has some detail from webench ? other software for transformer ?

Thanks

0 Marc Davis-Marsh over 12 years ago in reply to silvio ardi

TI__Genius 10095 points

To get the values from webench for a custom transformer. Click on the BOM button and look at the values for at T1.

There should be Values for

Lp (primary inductance)

Rp (primary resistance)

Leakage inductance

Ns1toNp (turns ratio)

Rs (secondary resistance)

You can also find the peak primary current by clicking on the Op Vals button.

Regards,

Marc

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Transformer for LM2587