Re: Strange Half-Bridge Heat?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: humanb-at-chaoticuniverse-dot-com 

Sounds to me like you may have a phasing issue with your gate drive output.
Regards,

David Trimmell


On Fri, 09 Jul 2004 07:36:19 -0600
  "Tesla list" <tesla-at-pupman-dot-com> wrote:
>Original poster: Robynsaddiction-at-aol-dot-com OK. So, I am still working on 
>this SSTC from Jim Mitchell. However, my question pertains to my half 
>bridge. Everything seems to be working fine on the driver board (so far as 
>my ignorance can tell), but when I hook the GDT up to the half bridge the 
>tracks of the source and gate heat up. I thought it might have to do with 
>the zener diodes, so I unhooked them and the problem still persisted. The 
>10 ohm resistors in series with the gate heat up as well. Anyhow, at the 
>same time the UCC37321 and UCC37322 chips heat up terribly (but only when 
>connected to the half bridge). Well, I am thinking that there might be a 
>short in the half bridge, but no tracks are shorted. What other problems 
>could be causing this? Thanks, Richard