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Old 13th December 2011, 01:25 PM   #1
Join Date: Jun 2011
Default Gate drive value

I wish to use the HM42-40002LF gate drive transformer in a two transistor flyback converter at 67KHz

...however, the datasheet doesnt state the value.

I cannot understand how i am supposed to work out if it will saturate or not.

For my application, i require of T(sw)*12 = 180.

(im only driving the top fet by transformer).

I am amazed at the complete lack of off-the-shelf parts for this purpose...surely high side pulse transformer drive is very common?

Do you know how to work out if it will saturate or not (from above datasheet)?
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Old 13th December 2011, 01:50 PM   #2
gmarsh is offline gmarsh  Canada
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Join Date: Apr 2004
Location: Halifax, NS
E-mail them!

Or sample one, drive it with a gate driver/function generator, and measure it.

edit: or go with a vendor that publishes the numbers:

Last edited by gmarsh; 13th December 2011 at 01:53 PM.
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Old 13th December 2011, 02:09 PM   #3
Join Date: Jun 2011
Thanks i will email.....the Pulse ones that meet my spec are very expensive.... $3.82 for 240 pces...............


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