4 IVY IIIs how much current should placid HD be set for?

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4 IVY IIIs how much current should placid HD be set for?

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dariedel2		#1 Posted : Friday, August 21, 2015 2:29:34 AM(UTC)
Rank: Member Groups: Member Joined: 1/15/2013(UTC) Posts: 49 Location: DC Thanks: 1 times		I am using placid HD to drive 4 IVYs. What should I set current for and how much shunt? Thanks, Doug Riedel


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Brian Donegan		#2 Posted : Friday, August 21, 2015 6:07:42 PM(UTC)
Rank: Administration Groups: Administration, Customer Joined: 10/24/2006(UTC) Posts: 2,868 Location: Massachusetts, USA Thanks: 2 times Was thanked: 141 time(s) in 134 post(s)		You will require a lot of heatsinking for this, as there will be a lot of shunted current under normal use. I would set the current to something like 750mV (750mA) with no load connected, then add one IVY at a time (power off when adding each one) and check the output voltage and shunt current, adjusting as needed. Once you have them all hooked up, shoot for something like 150-200 mA of shunt current (150-200mV at the test points).
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dariedel2		#3 Posted : Friday, August 21, 2015 6:42:44 PM(UTC)
Rank: Member Groups: Member Joined: 1/15/2013(UTC) Posts: 49 Location: DC Thanks: 1 times		Thanks Brian. I was temporarily using Placid HDBP because my negative side of the Placid HDBP 2.1 was not working. I got proper voltage reading on positive side (apx 15 v) and nothing on negative side with no load attached. I just ordered today another Placid HDBP because I thought it will be easier to try again instead of troubleshooting. but I would like to use both Placid HDBP 2.1s once I get the first one fixed. On that note, I checked all the QP1/QP2 QN3/QN4 etc and they are all the correct parts. Any other thoughts on what might be causing the dead side? Thanks, Doug


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