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Old 30th January 2011, 10:16 PM   #1101
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I'm in the process of building Buffalo II + Tridents + Placid powered by a 12.5V 95AH SLA. On the bench all power supplies measure correctly.
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Old 30th January 2011, 11:53 PM   #1102
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If you are using batteries and Tridents, you might want to use a linear pre-regulator (LCDPS) rather than a Placid. Shunts are very inefficient, so adding another high-current element will kill your batteries a lot faster than needed. There would not be much (if any) difference in the output voltage noise (and other characteristics) from the Tridents/AVCC regulators.
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Old 31st January 2011, 11:10 AM   #1103
UKPD is offline UKPD  United Kingdom
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Hi

Just wandering if there will be a benefit of running each trident from separate LCDPS's and Placid, so clock Trident off a Placid, Core 1V2 Trident and 3V3 Trident off a LCDPS and the rest off another LCDPS. What I'm after is separating each supply section. Any opinions?. Will there be any issues with timing for the clock Trident being powered off Placid against the rest of B2 off LCDPS's?

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Peter.

Last edited by UKPD; 31st January 2011 at 11:28 AM.
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Old 31st January 2011, 11:21 AM   #1104
NicMac is offline NicMac  Italy
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As all the local supplies are shunt types there wont be much regulation to be done upstream. I doubt that you would find any difference. You would also need to cut traces on the Buffalo. My 2 cents.
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Old 31st January 2011, 11:39 AM   #1105
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I'd only cut supply headers on Tridents, not traces on B2. Easily reversible with solder link. My aim was not to improve regulation rather to minimise interaction on power supply lines to different sections.


Peter.
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Old 31st January 2011, 12:08 PM   #1106
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Each of the tridents presents a constant load (they are a CCS). So there is really not a compelling reason to do what you are saying.
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Old 31st January 2011, 12:12 PM   #1107
UKPD is offline UKPD  United Kingdom
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Just noticed on top of Tridents there are +/- terminals. Can you supply them from there? Russ, if that's not classified info?
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Old 31st January 2011, 12:13 PM   #1108
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Thanks Russ,
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Old 31st January 2011, 12:26 PM   #1109
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Why not just us ethe "IN" pad?
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Old 31st January 2011, 12:31 PM   #1110
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