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Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
hey, just a quick question, how much power does a typical drsstc driver board consume? say i have a driver like steves drsstc3 driver. to power the 5v section, the current is low because it is composed of logic ic's. but what about the 15v section? i am not looking for an exact answer, i just want to know how much current ucc3732x's draw in a typical drsstc application. it probably depends a lot on the gdt however...
Registered Member #2288
Joined: Wed Aug 12 2009, 10:42PM
Location: Cambridge, MA
Posts: 179
You can roughly estimate it by the gate charge from the transistor data sheet. 2*F*D*Transistor_count*Q should give J/s, which is A. Although this is a low end estimate since it disregards magnetization currents assuming you are using a GDT. If you were to use discrete floating drivers, it would actually be a very accurate estimate but I doubt that is the case based on your question.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
Ok, this is just a question in case I hypothetically use a boost converter as the 15v source. I don't even know why I thought of it though, it's a complete waste as you have to be hooked up to mains anyways... Just thought I'd ask because it can't hurt to know.
Registered Member #2919
Joined: Fri Jun 11 2010, 06:30PM
Location: Cambridge, MA
Posts: 652
dude_500 wrote ...
You can roughly estimate it by the gate charge from the transistor data sheet. 2*F*D*Transistor_count*Q should give J/s, which is A. Although this is a low end estimate since it disregards magnetization currents assuming you are using a GDT. If you were to use discrete floating drivers, it would actually be a very accurate estimate but I doubt that is the case based on your question.
And double that if you're using any gate resistance since half the power is lost there.
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drsstc driver board current draw
