Link board project upgrade
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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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Link board project upgrade

LINK BOARD PROJECT UPGRADE

Pigi Paolucci and Napoli group


Outline

Outline

  • LB CAD project

  • LVDS suppressor studies

  • LV regulator studies

  • Open questions

  • To be done

Pigi Paolucci


Lv regulator lhc4913

LV Regulator LHC4913

Pigi Paolucci


Lb project schema

LB project schema

Pigi Paolucci


Test schema lhc4913

Test schema LHC4913

Pigi Paolucci


Temperature tests

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


Rumping up and down

Rumping up and down

Vin

Vout

Vin

Vout

Pigi Paolucci


Temperature tests1

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


Rumping up and down1

Rumping up and down

Vin

Vout

Vin

Vout

Pigi Paolucci


Different loads

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


How does react to input spikes

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


Heat dissipation

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


Max temperature behaviour

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


Regulator infrared scan

Regulator Infrared scan

Standard condition

Worst case – before shutdown

Worst case – after shutdown

Pigi Paolucci


Costs

Costs

Pigi Paolucci


Time schedule

Time schedule

Installation and commissioning in the 2013

Pigi Paolucci


Manpower and tasks

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


Manpower needed

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


To be done

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


Conclusion

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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