• Slides: 20

Outline 2 LB CAD project LVDS suppressor studies LV regulator studies Open questions To be done Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

LV Regulator LHC 4913 3 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

LB project schema 4 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Test schema LHC 4913 5 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Temperature Tests Vin = 5 V Vout = 3. 3 V Iout = 1. 4 A (Load=2. 3 W//2200 u. F); Ta = 27°C; Td = 91°C 1 volt 1 msec Vin Vout 2 msec 6 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Rumping up and down Vin Vout 7 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Temperature Tests Vin=5 V; Vout=3. 3 V Iout=2. 6 A (Load=1. 2 W//2200 u. F); Ta=27°C; Td=135°C 1 volt 1 msec Vin Vout 8 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Rumping up and down Vin Vout 9 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Different Loads Vin=5 V; Vout=3. 3 V Iout 1=1. 4 A (Load=2. 3 W//2200 u. F) Iout 2=2. 6 A (Load=1. 2 W//2200 u. F) Vin Vout 10 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

How does react to input spikes Vin=5 V; Vout=3. 3 V Iout 1=1. 4 A (Load=2. 3 W//2200 u. F) Spike=5 V / Vin=10 V Spike su Vout > 10 m. V Vin Vout 11 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Heat Dissipation Tmax (junction) = 125°C; Rcase (junction) = 2°C/W (datasheet) Working case Vin = 5 V; Vout = 3. 3 V; Iout = 1. 5 A Power to dissipate = (5 V - 3. 3 V) * 1. 5 A = 2. 55 W; Tamb=25°C Rtot = DT/W = (125°C – 25°C)/2. 55 W = 39°C/W Rheatsink = Rtot-Rjc = 37°C/W Worst case Vin=6 V; Vout=3 V; Iout=3 A Power to dissipate= (6 V – 3 V) * 3 A = 9 W; Tamb = 40°C Rtot = DT/W = (100°C - 40°C)/9 W = 6. 6°C/W Rheatsink = Rtot-Rjc = 4. 6°C/W 12 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Max temperature behaviour Test Conditions Vin=6 V; Vout=3. 3 V; Iout=2. 6 A; Tamb=25°C Temperature on the case: 155°C -: - 135°C 13 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Regulator Infrared scan Standard condition Worst case – before shutdown Worst case – after shutdown 14 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Costs needed spare PCB + mount + test components cost Total Crates 12 2 € 100, 0 € 1. 400, 0 Control. Board 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 € 63. 600, 0 Back. Plane 12 2 € 337, 0 € 395, 0 € 732, 0 € 10. 248, 0 Frontplane 24 4 € 99, 0 € 75, 0 € 174, 0 € 4. 872, 0 Mod APA 450 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 15 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Time schedule 2011 J F M A M J J A 2012 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 16 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Manpower and tasks 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 17 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 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Manpower needed ? § 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 18 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

To be done Document about the project, schedule, manpower and responsibilities: Napoli, LNF and Warsaw ? : 19 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 ? Pigi Paolucci Link Board Upgrade Meeting - Dec 2010

Conclusion Preliminary conclusions of the Electronic Service in Napoli: 1. 2. 3. 4. 20 The present project is very good, complex and sophisticated; congratulation to our Warsaw/Finland colleagues Two “rad-hard” LV regulators per boards (LB/CB) are suggested – heat dissipation to be studied very carefully Not clear if we really need a set of LVDS protections 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 Pigi Paolucci Link Board Upgrade Meeting - Dec 2010