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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. LV Regulator LHC4913. LB project schema. Test schema LHC4913. Temperature Tests. Vin = 5V Vout = 3.3V

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LINK BOARD PROJECT UPGRADE

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  1. LINK BOARD PROJECT UPGRADE Pigi Paolucci and Napoli group

  2. Outline • LB CAD project • LVDS suppressor studies • LV regulator studies • Open questions • To be done Pigi Paolucci

  3. LV Regulator LHC4913 Pigi Paolucci

  4. LB project schema Pigi Paolucci

  5. Test schema LHC4913 Pigi Paolucci

  6. Temperature Tests Vin = 5V Vout = 3.3V Iout = 1.4A (Load=2.3W//2200uF); Ta = 27°C; Td = 91°C 1 volt 1 msec Vin Vout 2 msec Pigi Paolucci

  7. Rumping up and down Vin Vout Vin Vout Pigi Paolucci

  8. Temperature Tests Vin=5V; Vout=3.3V Iout=2.6A (Load=1.2W//2200uF); Ta=27°C; Td=135°C 1 volt 1 msec Vin Vout Pigi Paolucci

  9. Rumping up and down Vin Vout Vin Vout Pigi Paolucci

  10. Different Loads Vin=5V; Vout=3.3V Iout1=1.4A (Load=2.3W//2200uF) Iout2=2.6A (Load=1.2W//2200uF) Vin Vout Pigi Paolucci

  11. How does react to input spikes Vin=5V; Vout=3.3V Iout1=1.4A (Load=2.3W//2200uF) Spike=5V / Vin=10V  Spike su Vout > 10mV Vin Vout Pigi Paolucci

  12. Heat Dissipation Tmax (junction) = 125°C; Rcase (junction) = 2°C/W (datasheet) Working case Vin = 5V; Vout = 3.3V; Iout = 1.5A Power to dissipate = (5V - 3.3V) * 1.5A = 2.55W; Tamb=25°C Rtot = DT/W = (125°C – 25°C)/2.55W = 39°C/W Rheatsink= Rtot-Rjc = 37°C/W Worst case Vin=6V; Vout=3V; Iout=3A Power to dissipate= (6V – 3V) * 3A = 9W; Tamb = 40°C Rtot = DT/W = (100°C - 40°C)/9W = 6.6°C/W Rheatsink= Rtot-Rjc = 4.6°C/W Pigi Paolucci

  13. Max temperature behaviour Test Conditions Vin=6V; Vout=3.3V; Iout=2.6A; Tamb=25°C Temperature on the case: 155°C -:- 135°C Pigi Paolucci

  14. Regulator Infrared scan Standard condition Worst case – before shutdown Worst case – after shutdown Pigi Paolucci

  15. Costs Pigi Paolucci

  16. Time schedule Installation and commissioning in the 2013 Pigi Paolucci

  17. 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 • 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

  18. 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 Pigi Paolucci

  19. 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 ? Pigi Paolucci

  20. Conclusion • Preliminary conclusions of the Electronic Service in Napoli: • 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

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