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Old 17th October 2005, 09:04 AM   #1
Loial is offline Loial  Sweden
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Default Gate drive transformers?

I've got a few small transformers from work, they are originally used in a PSU, 16-30V -> 7V@7.5A.
The windings are 6:5. operating frequency for the PSU is 225 kHz.
I wonder if these may be suitable as gate drive transformers even without rewinding, wich was my first thougt.
The transformer is 20*20*8-10 mm.
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Old 17th October 2005, 10:58 PM   #2
mzzj is offline mzzj  Finland
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Default Re: Gate drive transformers?

Quote:
Originally posted by Loial
I've got a few small transformers from work, they are originally used in a PSU, 16-30V -> 7V@7.5A.
The windings are 6:5. operating frequency for the PSU is 225 kHz.
I wonder if these may be suitable as gate drive transformers even without rewinding, wich was my first thougt.
The transformer is 20*20*8-10 mm.
Just an guess: primary inductance is not big enough and you end up with huge magnetisation current.
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Old 18th October 2005, 05:03 AM   #3
Loial is offline Loial  Sweden
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I guessed the low nomber of windings would be a problem, yes...
There are however some transformers, a bit smaller though, but they have a 3,3V secondary - going to investigate these a bit more later today...
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Old 18th October 2005, 09:17 AM   #4
Pierre is offline Pierre  France
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Location: Paris
If you are looking for gate drive transformers, let me recommend you Coilcraft SD250-4 or Pulse T0584 (or the variations that suit your application if you need full-bridge driving).
You can find some experimental results is some threads in this forum.

Hope this helps.
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