low power hv supply with signal amplifier

P.F.TimmerNikhefAmsterdamElectronics- Technology

1

Low power HV supply with signal amplifier

Base for a 10 dynodes HAMAMATSU PMT in single photon count mode

P.F.Timmer

Reference: http://iopscience.iop.org/1748-0221/5/12/C12049/

28-01-2014 Amsterdam


2

PMT-base.

Version-1

Low power Low RFI Low ripple Adjustable HV Small foot print

Optical moduleIncl. Storey logic

Version-3


Requirements


3

E/O Diagram

switch

pre-ampcomp

thdac

decoder

photons

3V3

spherelogic

switchswitch

3V3

12V

tim.,sc

conversions

ln

ln+1

osc.1 feedback

hvdac

HVi2c

12+19

PMT-base

cpld

Octopus

CLB

i2c

PMT-module

ID

extraelectr.

LVDSpinBOB

2

analog.out



4

PMT proposed form factor

<105

dimensions in mm PCB spacePCB space



5

HV generation

Uhv

k d1 d2 d9 d10 a

k d1 d2 d9 d10 a

Uhv

~

Cb

Cp

Resistor base

Cockroft Walton base

+Low power-Fixed voltage ratio

- High power- Temp. Sensitive- Volume



6

Simplified diagram of HAM_PROMiS2_V1 base Voltage ratio: total 13 steps

1

1

1

1


3

6

100n

d10

d9

d8

d1

d2

100n

100n

100n

100n

100n

100n

100n

22n

22n

22n

22n

22n

22n

22n

22n

3V3

22n

COCO

L2

L3L1a

L1b

k

47n 47n

47n 47n

22k 22k

22k 22k

56

56

220pF

1uF

1M5

1M5

3G

PROMiS2

3V3

AAnalog and digital output

I2C

HV DAC out

FB

-700V to -1500V

L4

100n


7

HV actual wave forms

KD1

D9D10

I-fet


P. F.TimmerNikhefAmsterdamElectronics- Technology

Select components which can withstand the high voltage in the CW multiplier.

Check dissipation of every component. Check distance on PCB between high voltage components. Determine on which side of the PCB which part of the circuit will be

placed. Find a connector system which is sturdy enough.

Design considerations



Overview component specs.


# Refdes Value Applied Maximum ActualMaximu

m ActualMaximu

m Part Actual Maximum package Part discriptionvoltage rated reverse reverse current current Type power power

voltage voltage voltagedissipatio

n dissipation(V) (V) (V) (V) (mA) (mA) (mW) (mW)

1 C14, C32, C37 100nF 3,3 50 Ceramic Chip 603

General purpose MLCC 0603 X7R 100nF E6 range

2 C34 1uF 2 6,3 Ceramic Chip 603

General purpose MLCC 0603 X5R 1uF E3 range

3 C29, C30, C33, C39 10uF 3,3 6,3 Ceramic Chip 603

General purpose MLCC 0603 X5R 10uF E3 range

4 C41 10pF 3,3 25 Ceramic Chip 402

General purpose MLCC 0402 NP0 10pF E12 range

5 C36, C43 100nF 3,3 6,3 Ceramic Chip 402

General purpose MLCC 0402 X5R 100nF E6 range

6 C38 220pF 3,3 50 Ceramic Chip 603

General purpose MLCC 0603 NP0 220pF E12 range

7 C10, C12, C16, C28 47nF 115 200 Ceramic Chip 805

Middle voltage series 0805 X7R 47nF E12 range

8 C1, C2, C3, C4, C5, C6, C7, C8 22nF 115 200 Ceramic Chip 805


C9, C11, C13, C15, C17 805Middle voltage series 0805 X7R 22nF E12 range

9C20, C21, C22, C23, C24,

C25, C26 100nF 115 200 Ceramic Chip 1206


C27, C31, C35, C40, C42, C44 1206Middle voltage series 1206 X7R 100nF E12 range

10 R5 0 0 50 RM 0,000 63 603 General purpose Rsmd 0603 0R E9611 R2, R11 1.000 3 50 RM 0,100 63 603 General purpose Rsmd 0603 1K E9612 R13, R14 1.470.000 2 50 RM 0,003 63 603 High value Rsmd 0603 1M47 E96 range13 R12 10.000.000 3 50 RM 0,010 63 603 High value Rsmd 0603 10M0 E96 range

14 R1 1,5 0 50 RM 0,200 63 603General purpose Rsmd 0603 1R5 E24 range

15 R4, R9 56 0 50 RM 0,000 63 603General purpose Rsmd 0603 56R E24 range

16 R3, R7, R8, R10 22.000 0 75 RM 0,000 63 603General purpose Rsmd 0603 22K E24 range

17 R15 3.000.000.000 1500 2500 RM 0,750 2000 2512 Precision High Value Chip Resistor

18D1, D2, D3, D4, D5, D6, D7,

D8SWITCHING

DIODE 90 150 0.01 250 sot 223Dual, isolated high speed silicon switching diodes.

Pin 2 and 5 removed for isolationD9, D10, D11, D12, D13, D14 SWITCHING

DIODE 90 150 0.01 250 sot 223Dual, isolated high speed silicon switching diodes.

Pin 2 and 5 removed for isolation

19 U2 COCO 3,3 3,6 1,5 250 DFN8 COCO V2, SMT, DFN-8+EP20 U5 PROMiS2 3,3 3,6 30 250 QFN16 PROMIS V2, SMT, QFN-16+EP, UTAC

21 T1 PMF370XN 3,3 30 65 870 N-channel TrenchMOS extremely low level FET

22 L8 auto transformer EP7EP7 Coil Assembly, designed for project 45300.13.02

23 L1, L4 inductor 1210 Chip Inductor, 22uH, 10%, SMT24 L3, L5, L6, L9 bead 603 FERRITE BEAD, 0603, 600 OHM

25 J1 Connector Tiger Eye Socket, SEM series. 2x5p with 2 non-symmetrical placed welding pins


Limited space. High dv/dt in parts of the circuit. High voltage on PCB. Constraint editor is used. Very low signal amplification. For one photon 480 fC (PMT gain =

3E+6) DFM check of the PCB.

Layout



Fit rate componentsnumber ofcomponent

s Component Fit totalFit

1 COG capacitors 2 236 X74 capacitors 4 14428 Small signal Si diode 7 1961 Si small signal Transistors 12 12

13 Metal film, 1% 7 911 Op Amps, Comparators (COCO) 130 130

1Complex, Instrumentation Amp (PROMiS2) 200 200

1 Transformers 10 105 Inductor 10 50

10Surface-mount solder joint (2/solder joint) 2 20

10 I/O connectors (1/contact) 1 10865

11

Reliability of components

73%

5%

5%

2% 5%5% 5%

0%

Tests evaluation

Components @ 45 °C : 865 FITStress factors;

Stationary use: 0.5Temperature @ 20 °C: 0.18

Evaluated value: 200 FIT


22%

9%

15%

4%9%

12%

20%

9%

system management

components

design

manufactering

ware out

induced

no defects

software


12

SpecificationsHV circuit, for 10 dynodes PMTLow ripple

706 mV1170 8.5 < T(°C) < 22.10.07% 8.5 < T(°C) < 22.1Voltage stable at 3 V < Vinput < 3.6 V

Low total powerVinput 3.3 V 4,5 mW 1500V for HV generation30 mW for PROMiS2Low RFIdV/dt < 75 mV/µs, RFI -20 dB @ 150 kHz-10 MHzAdjustable HVcathode voltage -700 _ -1500 V Adjustable threshold for pulse width adjustment

~ 30nSec for one photonSmall foot printPCB = 43 mmØ

Reliability200 FIT @ 20 °C, stationary use, after tests



Validation tests chips◦ Tests the PROMiS2 and COCO chips by a test house. ◦ (Functional, HTOL, HTSL, ESD ad Q&R tests.)

PCB tests ◦ Storage;

Tamb->30min-10 °C ->1h->60 °C ->1h->60 °C ->-10 °C ->30min->Tamb◦ Temp. Shock;

Tamb->Tamb+50 °C ->1h->Tamb+50 °C -> 0sec ->Tamb◦ Influence oscillator frequency on PMT output

Acceptance tests (meet specifications)◦ Done with PMT base tester

Cleaning + Drying◦ Ultra sone

Coating◦ Polyurethane

Test procedures

13



14

Promis

PROMIS

omiCoCo

CWHighVoltagecircuit

HV measurement

unit 1supply

HV barrier

HV measurement

unit 14supply

HV barrier

PMT base adapter

ControlBoard

PMT TailAdapter

VoltageAdjustmentandCurrentmeasurement

TestPROMISoutputs

Safety system

Electronicsfor chargeinjection PROMIS Test HV

Control And I2C

Digital value HV control

Digital value of inter dynode voltages

Digital value for charge adjust

Digital value PROMIS outputs

CoCo testfrequentieandpulse width

Digital values frequency and pulse width

PMT base

Discharge capacitors from CW high voltage circuit

Test setup



Check if supply current is in range. Check I2C communication. Check DACHV output of PROMiS2. Check switch output of COCO. Check pulse width of switch output of COCO. Check maximum frequency of COCO. Check if HV is coming up. All inter dynode voltages are measured

separately. Check range of HVDAC output and HV output. (steps of 50V). Check if HV diodes and capacitors don’t leak. Check system with supply voltage variations from 3V – 3.6V. Check pulse width output of PROMiS2 when charge is injected.

Comparator DAC will be set to give the right pulse width. Check analogue output of PROMiS2 when charge is injected.

PMT functionality tests.



Mechanical overview of tester

16

PMT Baseadapter setwith contact

pins

PMT baseto be tested

Mother board

HV measurementunit

(Mezzanine)FPGA board

with USBinterface

to PC



The test setup



Control panel for test setup


Start up wave forms of dynode connections



Discharge waveforms of dynode connections



File with test results


Tester number: 0Timestamp: 7-1-2014 14:24Base Type: Hamamatsu

Serial number PROMiS (x): 0000AESerial Number Base 100012

Base PowerVBase (V) IBase (mA)

3.299 9.039HV Test

DAC PROMiS (V) Pulse Freq Min (Hz) Pulse Freq Max (Hz) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 Total0.000 1.886 490.453 Inf 54.284 53.688 53.923 53.917 53.482 53.556 53.760 54.297 53.626 54.290 54.594 54.789 55.085 703.293

15.000 1.930 597.696 1.871.398 57.916 57.449 57.568 57.611 57.167 57.246 57.310 57.968 57.159 57.850 58.081 58.268 58.472 750.06431.000 1.980 727.564 2.215.281 62.002 61.469 61.583 61.564 61.105 61.126 61.240 61.862 60.978 61.664 61.851 62.029 62.300 800.77247.000 2.028 873.012 2.504.257 65.991 65.489 65.597 65.582 64.979 65.006 65.171 65.884 64.797 65.478 65.714 65.822 66.001 851.51263.000 2.079 1.032.802 2.787.301 70.044 69.509 69.551 69.600 68.981 69.013 69.101 69.779 68.680 69.324 69.515 69.708 69.828 902.63479.000 2.131 1.392.312 3.076.829 74.001 73.465 73.504 73.618 72.919 72.893 72.905 73.673 72.467 73.107 73.379 73.470 73.530 952.92995.000 2.178 1.665.806 3.374.502 77.957 77.355 77.457 77.506 76.762 76.709 76.709 77.504 76.255 76.921 77.148 77.137 77.294 1.002.713

111.000 2.228 1.659.503 3.735.525 81.978 81.440 81.410 81.459 80.668 80.653 80.703 81.462 80.201 80.862 81.043 81.055 81.184 1.054.118127.000 2.277 1.899.407 4.169.099 85.999 85.395 85.363 85.412 84.670 84.596 84.697 85.420 84.084 84.740 84.939 85.004 85.074 1.105.393143.000 2.326 2.174.859 4.578.126 90.020 89.350 89.316 89.430 88.545 88.540 88.564 89.378 87.966 88.618 88.771 88.828 88.838 1.156.165159.000 2.377 2.522.513 5.042.102 93.976 93.371 93.269 93.383 92.483 92.420 92.431 93.272 91.786 92.559 92.603 92.652 92.665 1.206.871175.000 2.426 2.955.520 5.563.592 98.062 97.326 97.346 97.336 96.389 96.300 96.425 97.167 95.637 96.437 96.373 96.539 96.618 1.257.954191.000 2.473 3.470.656 6.198.091 102.018 101.411 101.176 101.354 100.423 100.307 100.419 101.189 99.615 100.315 100.362 100.425 100.382 1.309.395207.000 2.522 4.190.939 6.949.753 105.975 105.301 105.129 105.242 104.234 104.187 104.223 105.211 103.434 104.129 104.163 104.186 104.146 1.359.560223.000 2.572 5.007.762 7.908.889 109.866 109.192 109.020 109.131 108.108 108.003 108.026 108.914 107.221 107.944 107.932 107.948 107.911 1.409.215239.000 2.622 6.342.360 9.171.788 113.887 113.147 113.035 113.084 112.110 111.947 111.957 112.872 111.072 111.949 111.890 111.834 111.738 1.460.521255.000 2.675 7.730.365 10.858.942 117.908 117.232 116.988 117.166 115.985 115.827 115.888 116.830 114.955 115.795 115.722 115.721 115.690 1.511.707

HV Test VBase Sweep

VBase (V) PROMiS (V) Pulse Freq Min (Hz) Pulse Freq Max (Hz) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 Total3.600 2.672 3.596.605 3.851.783 117.778 116.973 116.741 116.907 115.762 115.763 115.888 116.766 114.955 116.081 115.911 115.972 116.004 1.511.5003.400 2.672 3.992.654 4.827.653 117.843 117.232 116.927 116.972 115.921 115.827 115.888 116.830 114.987 115.858 115.911 115.909 115.941 1.512.0453.300 2.672 4.943.398 5.869.234 117.908 117.232 116.927 117.166 115.953 115.827 115.951 116.958 114.987 115.826 115.911 115.909 115.816 1.512.3703.200 2.672 6.018.296 7.437.709 117.908 117.232 116.927 117.166 115.985 116.018 115.951 116.958 114.987 115.826 115.911 115.846 115.753 1.512.4673.100 2.675 7.602.828 10.046.213 117.908 117.232 116.957 117.166 115.985 116.018 115.951 116.958 114.955 115.826 115.754 115.721 115.690 1.512.1213.000 2.672 10.161.569 13.685.508 117.908 117.232 116.988 117.166 115.985 116.018 115.951 116.830 114.955 115.795 115.722 115.658 115.565 1.511.773

HV Test Discharge

VBase (V) PROMiS (V) Pulse Freq Min (Hz) Pulse Freq Max (Hz) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 Total2.800 2.672 9.231.905 15.475.085 67.256 71.584 75.017 78.932 83.908 86.504 88.374 91.166 91.022 92.687 93.545 102.713 102.891 1.125.599

HV Test Max Frequency

VBase (V) PROMiS (V) Pulse Freq Min (Hz) Pulse Freq Max (Hz) D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 Total3.300 2.672 760.531 46.511.629 0.713 0.746 0.679 0.745 0.730 0.763 0.761 0.766 0.764 0.858 0.880 0.940 0.941 10.287

Analog BufferVBase (V) IBase (mA)

3.299 70.675

An Ch DAC Analog PROMiS (mV) TDC (nsec)0.000 278.301 0.655

63.000 907.436 26.190127.000 1.412.331 34.970191.000 1.750.690 41.029255.000 1.909.296 47.150319.000 2.012.389 53.581383.000 2.089.049 58.898447.000 2.147.204 64.277511.000 2.196.107 70.089575.000 2.231.794 74.850639.000 2.266.158 80.477703.000 2.291.271 85.052767.000 2.316.383 90.184831.000 2.337.531 94.945895.000 2.354.713 99.891959.000 2.369.252 104.467

1.023.000 2.379.826 109.413


22

Where are we now?

Little update of PCB layout Test setup is functional

Acceptance test Production PMT

Tender Assembling with PMSoldering?Cleaning, coating deviceTesting?

WhereExternal?Internal?Institute?


K

Dy5Dy4

Dy3

Dy2

Dy1

Dy6Dy7

Dy8

Dy9Dy10

Pnc

Anode

Base for Hamamatsu PMT


10 prototypes of the HAM_PROMiS2_V1 are produced, tested and functional.

80 bases for a pre series are produced. 72 are tested and functional.

8 bases are still in a panel. 72 bases are sent to Erlangen. 540 base arrived. The preparation for a tender of 15000 bases has started.

Status of the bases.



Questions



Temerature influenceDAC value versus HVTail protection against HVRoHS directive (thin whiskers)Hamamatsu tube with base

Extra sheets



Temperature influence (shock test)

26

99.6%

99.7%

99.8%

99.9%

100.0%

100.1%

100.2%

100.3%

100.4%

-40 -20 0 20 40 60 80

devi

ation

T [°C]

785

983

1180

1378

1474

1 h

1 h

1 hvoltage



Temperature influence

27

99.4%

99.5%

99.6%

99.7%

99.8%

99.9%

100.0%

100.1%

100.2%

100.3%

0 20 40 60 80 100

HV d

evia

tion

T [°C]

785

983

1180

1378

1474

ΔT=10 °C/hvoltage



DAC value to HV value

28

700

800

900

1000

1100

1200

1300

1400

1500

0 16 32 48 64 80 96 112 128 144 160 176 192 208 224 240 256

HV [V

]

DAC value [decimals]

DAC=HEX2DEC(dac) HV=3.0887*DAC+686.2DAC=0.3238*HV-222.16dac=DEC2HEX(DAC)



HV-protection

29

Protect HV from neighbour basesProtect neighbour

tails from HV



RoHS directiveRestriction of the use of certain Hazardous Substances in electronic equipment.Consequences;Higher solder temperatures (up to 260°C)Favorite solder: SnAgCu alloy (217°C)Chance for more excessive tin whisker growth

Tin whiskers, length up to 10mm, diameter up to 10µm.Optimal growth at 50°CRef: http://nepp.nasa.gov/whisker/background/index.htm

electrical short circuitsdebris, contamination,metal vapor arc, due to HV.

Image Courtesy of T. Riccio (STPNOC)

Conformal coating like Parylene Ctends to buckle the whisker.


http://nepp.nasa.gov/whisker/background/index.htm

low power hv supply with signal amplifier

Documents

check system

check switch output

check dachv output of

check range of hvdac

hv diodes

check i2c communication

low power hv supply

pmt outputacceptance