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Old 5th August 2005, 03:15 PM   #1
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Default Fuses, primary, rails, current limiters and channels?

Hey Guys,
Thsi is my first chip amp and torroidal PS (Brian's 4780 kit, but 6 channel). I am using an Avel 800va. I was hoping to fuse each channel, but I am realizing that not so easy, unless you fuse the rails and I am not so sure that is a good idea incase one goes and the other does not. Also, I considering a current limiter in series with the primary fuse -- for 6CH, I was thinking of a 8A current limiter and a 10 amp fuse. What do you guys do for the PS? Thanks for any inputs.
-BG
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Old 5th August 2005, 03:52 PM   #2
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With regards to fused rails, it's OK. Prof. Leach, for one, does it on the "Leach" Amp.
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Old 5th August 2005, 04:04 PM   #3
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bg,
even if one goes and the other does not? THX,
-BG
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Old 5th August 2005, 04:07 PM   #4
Mr Evil is offline Mr Evil  United Kingdom
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That depends on the particular amp. Some topologies will not like it and may swing the output to the other rail, some will be fine. It's a fault condition that is worth testing for when designing an amp.

Whether the chip amp you're using will be alright or not I don't know, but I suspect that it will be fine, since such devices are usually quite robust.
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Old 5th August 2005, 04:15 PM   #5
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Thanks, Mr Evil. I am pretty sure the 4780 has a lot of built in stuff, but I will check on it.
-BG
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