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4hv.org :: Forums :: Tesla Coils

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problems with gatedriver

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LAN_403

Sat May 15 2010, 06:31PM

Registered Member #2485 Joined: Fri Nov 27 2009, 02:31PM
Location: Germany
Posts: 11

Hi,

i'm momently bluiding a Drsstc ,but now i have problems with the highside-gatedriver.
here is the schematic i'm using.

Everytime when i turn it on without voltage on the brigde the (interupter-)signal at the gates is good, but when i turn the
brigdevoltage on its killing the Highsidedriveric (IC1/UCC37321).
Anyone an idea why?

the gatedriverboard:

the Igbt: (datasheet:

)

Hope you can help me.

Dr. Dark Current

Sat May 15 2010, 06:59PM

Registered Member #152 Joined: Sun Feb 12 2006, 03:36PM
Location: Czech Rep.
Posts: 3384

What is C12 for? Do you realise it will have the full HF bridge output voltage across it? I'm not sure if that's what's killing your driver, but surely it must add a lot of ringing on the traces.

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