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Present Status Of Design Of Multichannel Power Supply For AHCAL SiPMs.

Present Status Of Design Of Multichannel Power Supply For AHCAL SiPMs. Shutov Vitaly, JINR DESY,December 10 th , 2012.

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Present Status Of Design Of Multichannel Power Supply For AHCAL SiPMs.

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  1. Present Status Of Design Of Multichannel Power Supply For AHCAL SiPMs. Shutov Vitaly, JINR DESY,December 10th, 2012

  2. Primary external power supply for SiPMs: - one per layer – no HV grouping - floating output- grounding point for each layer should be at the layer itself- the final voltage regulation is done on the calibration boardBaseline numbers: - 48 layers per half octant - 32 half-octants Total number of channels: 48*32= 1536768 channels per crate -> two 19-inch 6U crates. Shutov Vitaly, JINR. DESY,December 10th, 2012

  3. M1 M3 M1 M4 M3 M2 M4 M4 M3 M3 M2 M2 M1 M2 M4 M1 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module 48-channel module System configuration 768 channels per crate Euro-mechanics 6U Branch 0 Branch 2 Branch 1 Branch 3 Ethernet to host computer System POWER SUPPLY 80V/700W System Controller External Shut Down Internal Bus Internal Bus Commercial power Supply (XP Power EMH350PS48x2) Internal Bus Internal Bus Shutov Vitaly, JINR. DESY,December 10th, 2012

  4. 48-channel EM-module of isolated power supply for AHCAL SiPMs System bus connector Half- Bridge Generator 200 kHz = 80V BV ~80V; 200kHz Syn Sh/Dn I²C 3.3V stabilizer 3.3V 3.3V I²C isolator I²C isolator 3.3V Rectifier and stabilizer Ch 1 Rectifier and stabilizer Ch 48 SDA +3.3V +3.3V SCL +130V +130V I²C MC MC Analog regulator Analog regulator Ch1 0-120V/5mA Ch48 0-120V/5mA Shutov Vitaly, JINR. DESY,December 10th, 2012

  5. Main parameters 1 Maximum output power 0,6 W 2 Range of output voltage + (0 to 120) V 3 Precision of output voltage regulation 10 bit 4 Output voltages spread (channel from cannel) 1% 5 Stability of an output voltages 0,01% 6 Temperature coefficient of an output voltage 100 ppm/K 7 Output voltage ripple and noise at full load < 10 mV 8 Maximum output current 5 mA 9 Precision of current threshold regulation 10 bit 10 Precision of output voltage and current readout 12 bit 11 Time of quick-action of current limiting circuit < 10 ms 12 Galvanic isolation +/- 80 V 13 Temperature range 0 – 50 C 14 Humidity conditions < 85 % Shutov Vitaly, JINR. DESY,December 10th, 2012

  6. Galvanic isolation Galvanic isolation: (see circuit p.1) 1. Control line (I2C) - digital isolator based on a capacitive isolation barrier technique; 2. Transformer. Charge injection through insulating barrier. 1. Control line(I2C) isolator – Qi = ~1pC 2. Commercial transformer n = 1 : 1 a) bifilar windings – Qi = 70 pC b) sectional windings – Qi = 10 pC -> 10mV@1nF 1. Midcom WURTH ELEKTRONIK p/n 40609R 4,7mH; 8,9x6,3x4,1mm 2. Midcom WURTH ELEKTRONIK p/n 40190R 3,1mH; 8,9x5,3x5,3mm - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Wurth Elektronik eiSos GmbH & Co. KG EMC & Inductive Solutions. Max-Eyth-Str. 1 74638 Waldenburg, Germany Tel. +49 (0) 79 42 945 - 0 www.we-online.com eiSos@we-online.com Shutov Vitaly, JINR. DESY,December 10th, 2012

  7. Photo of pre-prototype of one channel of isolated power supply for AHCAL SiPMs Galvanic isolation box Power supply box Shutov Vitaly, JINR. DESY,December 10th, 2012

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