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Low Voltage Power Supplies: towards design specifications Henryk Palka, IFJ PAN Krakow (for WP 1.7.2 team: Krakow, Prague, KEK) DEPFET-Belle Meeting Karlsruhe, Dec 2nd, 2008 General considerations Voltages list and design parameters Mechanical form-factor Planning
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WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 2 Low Voltage Power Supplies (LVPS) LVPS module: analog and digital voltages, controllers, regulators, optocouplers LVPS unit(‘card’) = n LVPS modules(channels) the best if ‘n’ matches multiples of #DCD’s/half-ladder R bp =15mm, variable pitch version, ladders 10/12 L1/L2 L1 L2 F B F B Det.modules/0.5L 2 2 2 2 #DCD/0.5L 4 3 4 3 if 4 LVPS ch./card: 2*(10+12)=44 LVPS cards (156 channels) (3-4 crates) LVPS card: 4 LVPS modules, AC/DC generator, master card controller, temperature sensor, interlock circuit, hot-swap? General considerations: or ‘mono-voltage’ cards + power distributor close to the detector? (cable duct space)
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WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 3 Low Voltage Power Supplies (LVPS) -workout voltages list and design parameters: Voltage name Chip nameNominal voltage [V], accuracy or range Nominal/Maximum current [mA] Analog V A x DCD xx xx xx Analog V A x Switcher xx xx xx ……. Digital V D x DCD xx xx xx Digital V D x Switcher xx xx xx ……. VCSEL Control Voltage xx-yyxx ……. RESETHIGH/LOW Negative logic xx SELECTHIGH/LOWxx Current source 0thermistorxx Current source 1thermistorxx + output specs: noise level&frequency, ripple level,trip,ramp…
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WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 4 Low Voltage Power Supplies (LVPS) 6U (?) card in 19” Euro crate front panel LEDs: x4 + status (interlock/trip) backplane: decide connectors/cables Mechanical form-factor: Voltage NameAnalog V A Digital V D … Remote sensing controlYes MonitoringV/I Setting/Monitoring resolution1% Power Return LineAGNDDGND Remote controls & return lines:
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WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 5 Low Voltage Power Supplies (LVPS) workout a detailed list of components elaborate a technical specifications document estimate costs prototype procurement select the manufacterer Planning informal contact established with Fideltronik, the producer of HVPS for ATLAS of HVPS for ATLAS http://www.fideltronik.com.pl Short term agree on design parameters find/select a designer Long term
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WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 6
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