R 4.2.1 Power potentiometers Power potentiometers are as a rule wirewound. They are wound on a ceramic body and lack, due to heat dissipation concerns, encapsulation in casings or housings. Often they have a touch protection of silicone lacquer, cement or enamel and they are readily used as rheostats. If we turn the shaft of a rheostat towards zero resistance it is not unusual...
by Ciprian Ionescu, Andrei Drumea, Paul Svasta, Alexandru Vasile, Norocel CodreanuUniversity “Politehnica” of Bucharest, Romania, Center of Technological Electronics and Interconnection Techniques, UPB-CETTI presented by C.Ionescu at the 2nd PCNS 10-13th September 2019, Bucharest, Romania as paper 5.3. Abstract Supercapacitors are strongly emerged as a promising technology to complement the batteries. Due to their low rated voltages it is usual to build supercapacitor banks,...
by Alexander Teverovsky; Jacobs Technology Inc. NASA GSFC, USA BEST PAPER AWARD BY PCNS ATTENDEES presented by A.Teverovsky at the 2nd PCNS 10-13th September 2019, Bucharest, Romania as paper 5.1. Introduction One of the major benefits of chip polymer tantalum capacitors (CPTCs) compared to conventional MnO2 capacitors is reduction of the equivalent series resistance (ESR). Reduction of ESR improves the efficiency of parts for...
by Roland Chavasse, T.I.C. Tantalum-Niobium International Study Center presented by Roland Chavasse at the 2nd PCNS Symposium 10-13th September 2019, Bucharest, Romania as paper 4.5. TOP 5 Best Rated Paper rated by PCNS attendees ! This essay will explain how, over the last decade, supply chain risks in the tantalum industry have decreased considerably and, as a result, consumers of tantalum can have greater...
by Jean Pascal Michelet and Jean Edmond Le Calvé VALEO Créteil, France submitted to the 2nd PCNS 10-13th September 2019, Bucharest, Romania as paper 4.4. Introduction Some PCBAs were submitted to a whisker test +85°C 85% RH for 200h duration and additional 2h from +85°C/85% RH-T° +25°C/50% RH 5 Cycles. The functional test pass and boards were sent to an external lab for visual...
