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#1
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Pwr. Supply spec
Here's something I never noticed before. Spec on a brand chosen
randomly, Antec, shows a spec for 'Transient Response' as: "..returning to within 5% in less than 1ms for 20% load change. Don't know how much variation there is between brands but I find this interesting, since the spec is loose enough to allow for, say, a substantial dip or spike during the 1ms. hmm... fried substrate, anyone? |
#2
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Pwr. Supply spec
"OSbandito" wrote in message ... Here's something I never noticed before. Spec on a brand chosen randomly, Antec, shows a spec for 'Transient Response' as: "..returning to within 5% in less than 1ms for 20% load change. Don't know how much variation there is between brands but I find this interesting, since the spec is loose enough to allow for, say, a substantial dip or spike during the 1ms. hmm... fried substrate, anyone? The cause of damage (during power fluctuations) is increased current/heat. That's why a brownout is more harmful to electronics than a blackout. The blackout will cause a fluctuation in current momentarily, but the brownout can cause increased current for some length of time, which is very harmful. Even with a substantial dip or spike, you are talking about 1ms. That won't do much harm. -Dave |
#3
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Pwr. Supply spec
Dave wrote
OSbandito wrote Here's something I never noticed before. Spec on a brand chosen randomly, Antec, shows a spec for 'Transient Response' as: "..returning to within 5% in less than 1ms for 20% load change. Don't know how much variation there is between brands but I find this interesting, since the spec is loose enough to allow for, say, a substantial dip or spike during the 1ms. hmm... fried substrate, anyone? The cause of damage (during power fluctuations) is increased current/heat. That's why a brownout is more harmful to electronics than a blackout. The blackout will cause a fluctuation in current momentarily, but the brownout can cause increased current for some length of time, which is very harmful. Pity the above is talking about a LOAD change. Even with a substantial dip or spike, you are talking about 1ms. That won't do much harm. Depends on how substantial the spike is. |
#4
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Pwr. Supply spec
"OSbandito" wrote in message ... Here's something I never noticed before. Spec on a brand chosen randomly, Antec, shows a spec for 'Transient Response' as: "..returning to within 5% in less than 1ms for 20% load change. Don't know how much variation there is between brands but I find this interesting, since the spec is loose enough to allow for, say, a substantial dip or spike during the 1ms. hmm... fried substrate, anyone? Dave unleashed his nanobots with: The cause of damage (during power fluctuations) is increased current/heat. That's why a brownout is more harmful to electronics than a blackout. The blackout will cause a fluctuation in current momentarily, but the brownout can cause increased current for some length of time, which is very harmful. Even with a substantial dip or spike, you are talking about 1ms. That won't do much harm. -Dave Yer probably right. Most of the circuits supplied by the pwr.supply ought to have decent filter caps, zener, whatever. I've seen a lot of noisy ****, though, over the years. Mostly analog but same principle. Crappy caps are pointless cost-cutters, in my view. A good smaller-size filter cap, in bulk qty, is only a few cents more expensive than a tinny, mud-stuffed cheapie. |
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