Low Voltage Power Supplies: towards design specifications Henryk Palka, IFJ PAN Krakow (for WP team: Krakow, Prague, KEK) DEPFET-Belle Meeting Karlsruhe, Dec 2nd, 2008 General considerations Voltages list and design parameters Mechanical form-factor Planning
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 #DCD/0.5L 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)
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…
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:
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 Short term agree on design parameters find/select a designer Long term
WP 1.7.2: LV PS (Krakow, Prague, KEK), Karlsruhe DEPFET-Belle meeting Dec 2nd, 2008 H. Palka 6