Download - LINK BOARD PROJECT UPGRADE
LINK BOARD PROJECT UPGRADE
Pigi Paolucci and Napoli group
Outline
LB CAD project LVDS suppressor studies LV regulator studies Open questions To be done
Link Board Upgrade Meeting - Dec 20102 Pigi Paolucci
LV Regulator LHC4913
Link Board Upgrade Meeting - Dec 2010Pigi Paolucci3
LB project schema
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Test schema LHC4913
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Vin = 5VVout = 3.3VIout = 1.4A (Load=2.3//2200uF); Ta = 27°C; Td = 91°C
Link Board Upgrade Meeting - Dec 20106 Pigi Paolucci
Temperature Tests
1 volt1 msec
2 msec
Vin
Vout
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Rumping up and down
Vin
Vout
Vin
Vout
Vin=5V; Vout=3.3V
Iout=2.6A (Load=1.2//2200uF); Ta=27°C; Td=135°C
Link Board Upgrade Meeting - Dec 20108 Pigi Paolucci
Temperature Tests
1 volt1 msec Vin
Vout
Link Board Upgrade Meeting - Dec 20109 Pigi Paolucci
Rumping up and down
Vin
Vout
Vin
Vout
Vin=5V; Vout=3.3V
Iout1=1.4A (Load=2.3//2200uF)
Iout2=2.6A (Load=1.2//2200uF)
Link Board Upgrade Meeting - Dec 201010 Pigi Paolucci
Different Loads
Vin
Vout
Vin=5V; Vout=3.3V
Iout1=1.4A (Load=2.3//2200uF)
Spike=5V / Vin=10V Spike su Vout > 10mV
Link Board Upgrade Meeting - Dec 201011 Pigi Paolucci
Vin
Vout
How does react to input spikes
Tmax (junction) = 125°C; Rcase (junction) = 2°C/W (datasheet)
Working caseVin = 5V; Vout = 3.3V; Iout = 1.5A Power to dissipate = (5V - 3.3V) * 1.5A = 2.55W; Tamb=25°C Rtot = /W = (125°C – 25°C)/2.55W = 39°C/W
Rheatsink = Rtot-Rjc = 37°C/W
Worst caseVin=6V; Vout=3V; Iout=3A Power to dissipate= (6V – 3V) * 3A = 9W; Tamb = 40°C Rtot = /W = (100°C - 40°C)/9W = 6.6°C/W
Rheatsink = Rtot-Rjc = 4.6°C/W
Link Board Upgrade Meeting - Dec 201012 Pigi Paolucci
Heat Dissipation
Test Conditions Vin=6V; Vout=3.3V; Iout=2.6A; Tamb=25°C
Temperature on the case: 155°C -:- 135°C
Link Board Upgrade Meeting - Dec 201013 Pigi Paolucci
Max temperature behaviour
Regulator Infrared scan
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Standard condition Worst case – before shutdown
Worst case – after shutdown
Costs
Link Board Upgrade Meeting - Dec 2010Pigi Paolucci15
needed spare PCB + mount + test components cost Total
Crates 12 2 €100,0 €100,0 €1.400,0
ControlBoard 24 4 €430,0 €362,0 €792,0 €22.176,0
Link Board Master 48 5 €200,0 €450,0 €650,0 €34.450,0
Link Board Slave 96 10 €200,0 €400,0 €600,0 €63.600,0
BackPlane 12 2 €337,0 €395,0 €732,0 €10.248,0
Frontplane 24 4 €99,0 €75,0 €174,0 €4.872,0
Mod APA450 24 4 €146,0 €385,0 €531,0 €14.868,0
Mech. 24 4 €37,5 €30,0 €67,5 €1.890,0
€153.504,0
Time schedule
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2011 2012
J F M A M J J A S O N D J F M A M J J A S O N D
LB prototype
LB test
CB prototype
CB test
Lbox
production
Test 904
Installation and commissioning in the 2013
Manpower and tasks
Link Board Upgrade Meeting - Dec 2010Pigi Paolucci17
Napoli is interested in the design of the “up-to-date” system P. Paolucci, S. Buontempo, N. Cavallo (sabbatical year in the 2011) Electronic Service: 6-7 months in the 2010 and 2011 Napoli is now (2010) designing the “up-to-date” LB system including:
LVDS suppressor, LV regulators. First design almost ready (80%). Cost estimation ready
LNF is looking at the test and commissioning of the system L.Benussi, L.Passamonti (Tech.), D.Pierluigi (Tech.) and Electronic
Service: 3-4 months in 2011 Warsaw is in charge for the test, commissioning and installation
of the system Warsaw is the only group having the full expertise of the link
board hardware and firmware system The participation of new groups at the LB project has been
strongly recommended by the CMS management
Manpower needed ?
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Prototypes test at CERN: 1 tech + 1 phys for 3 months (2011) + Warsaw Test at CERN (blg 904): 1 tech + 1 phys for 6 months (2012) + Warsaw Installation: 2 tech + 1 phys for 6 months (2013) + Warsaw Commissioning: 1 phys for 3-4 months (2013) + Warsaw
To be done
Document about the project, schedule, manpower and responsibilities:
Napoli, LNF and Warsaw ?: Napoli and LNF: production Warsaw, Napoli and LNF: prototype test at 904 Warsaw, LNF and Napoli: Production test and commissioning
New design: regulators + heat sink + what else ? LV board: new firmware + what else ? What about the spares ?
Link Board Upgrade Meeting - Dec 2010Pigi Paolucci19
Conclusion
Preliminary conclusions of the Electronic Service in Napoli:1. The present project is very good, complex and sophisticated;
congratulation to our Warsaw/Finland colleagues
2. Two “rad-hard” LV regulators per boards (LB/CB) are suggested – heat dissipation to be studied very carefully
3. Not clear if we really need a set of LVDS protections
4. Spartan III configuration could be double checked
New LB boxes and boards can be produced in Italy but only Warsaw experts can test and commissioning the full system – Napoli and LNF will be part of the business but not the main actors
INFN will discuss and decide about the project in Jan 2011
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