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