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Placid HD BP & Placid HD for Buffalo IIISE - CCS and Shunt
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nvduybom  
#1 Posted : Thursday, January 24, 2013 8:13:10 AM(UTC)
nvduybom

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Hello,

I use Placid HD & Placid HD BP for Buffalo IIISE DAC & Legato IV .

I assembly Placid HD & Placid HD BP but I'm confused about CCS and Shunt, so anyone help me clear .

With HD BP no load, I measure :

. Vol across R1( TP_VIN & TP_CCS) is 0.11V (110mA)
. Vol across R2( TP_OUT & TP_Shunt) is 0.05V (50mA)
. Vol OUT is 14.75V . Vol OUT increase 0.01V-0.02V in about 20 minutes .

All heatsink is warm, not hot .

I read in manual "5. Now adjust the CCS current (VR1) as needed for your application.", I use Legato with current load of about ~350mA , so I have to measure Vol across R1( TP_VIN & TP_CCS) increase to 0.35V (350mA) ? .

Thanks .

Van Duy

Edited by user Thursday, January 24, 2013 8:24:51 AM(UTC)  | Reason: Not specified
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Corpius  
#2 Posted : Thursday, January 24, 2013 8:25:01 PM(UTC)
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Yes, but make sure that TP_OUT & TP_Shunt) stays about 0.05V (50mA). That would mean that the voltage measured over TP_VIN & TP_CCS should become about 0.400V (400mA)

350mA Legato + 50 mA shunt = 400mA
http://ce-designs.net/
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nvduybom  
#3 Posted : Friday, January 25, 2013 12:10:22 AM(UTC)
nvduybom

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Originally Posted by: Corpius Go to Quoted Post
Yes, but make sure that TP_OUT & TP_Shunt) stays about 0.05V (50mA). That would mean that the voltage measured over TP_VIN & TP_CCS should become about 0.400V (400mA)

350mA Legato + 50 mA shunt = 400mA


Thanks you,

I measured CCS 500mA will decrease to 400mA, All heatsink is so hot .

Connect to Legato , all is ok . I measured all Legato output Ballance & SE is 0.1mV DC .
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Corpius  
#4 Posted : Friday, January 25, 2013 9:29:08 AM(UTC)
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Originally Posted by: nvduybom Go to Quoted Post
All heatsink is so hot
The heatsinks will become very hot when no load is connected :) With the load connected they should get warm, but not very hot.

http://ce-designs.net/
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