P
Pimpom
- Jan 1, 1970
- 0
I started using a Tagan 700BZ PSU in my computer a couple of months
ago - my first PSU with active PFC. The UPS is a basic one that has
served me well for 10 years, and outputs a square wave on battery.
While setting up this particular combination, I briefly wondered how
the PFC circuit would react to working with non-sinusoidal power but
then forgot about it - until it died a couple of days ago. It blew the
fuse on the UPS and shows a short at the AC input. One of the two
paralleled 20N60C3 MOSFETs was a dead short.
The UPS battery - a 70Ah car battery - is of the same age as the UPS
(10 yrs) and has little backup power left. So I always shut my
computer down quickly in the event of a power outage, of which there
were dozens during the 2 months I've been using this PSU.
The PSU died while I was in another room. I didn't notice a power
outage or fluctuation during that time but can't be 100% certain. Is
it likely that there was an outage and the PFC transistor was finally
killed by the square-wave supply?
To put it another way, if I repair the PSU, is it likely to go poof
again unless I change my UPS to a more sophisticated one? I'd never
done a detailed study of practical active PFCs before and could well
miss something with a quick analysis.
(I did some online reading about active PFCs and non-sinusoidal
supplies after my PSU died but they're mostly end-user discussions and
are all inconclusive).
ago - my first PSU with active PFC. The UPS is a basic one that has
served me well for 10 years, and outputs a square wave on battery.
While setting up this particular combination, I briefly wondered how
the PFC circuit would react to working with non-sinusoidal power but
then forgot about it - until it died a couple of days ago. It blew the
fuse on the UPS and shows a short at the AC input. One of the two
paralleled 20N60C3 MOSFETs was a dead short.
The UPS battery - a 70Ah car battery - is of the same age as the UPS
(10 yrs) and has little backup power left. So I always shut my
computer down quickly in the event of a power outage, of which there
were dozens during the 2 months I've been using this PSU.
The PSU died while I was in another room. I didn't notice a power
outage or fluctuation during that time but can't be 100% certain. Is
it likely that there was an outage and the PFC transistor was finally
killed by the square-wave supply?
To put it another way, if I repair the PSU, is it likely to go poof
again unless I change my UPS to a more sophisticated one? I'd never
done a detailed study of practical active PFCs before and could well
miss something with a quick analysis.
(I did some online reading about active PFCs and non-sinusoidal
supplies after my PSU died but they're mostly end-user discussions and
are all inconclusive).