Boost converter: 12V / 24V, controled by UC3843

U radu je opisan istosmjerni uzlazni pretvarač, analiziran je rad matematičkog modela, opisan postupak izrade tiskane pločice i sklopa te su snimljeni valni oblici na ventilima i zavojnici u oba reţima rada. Upravljački krug sastoji se od vanjskih referentnih komponenti, povratne naponske i strujne veze i integriranog kruga UC3843 koji upravlja upravljivim ventilom pomoću pulsno-širinski moduliranog pravokutnog signala. Opisani su problemi nastali pri izradi sklopa prema orginalnoj shemi i postupci koji su poduzeti da bi se nastali problemi otklonili. Nastale preinake sklopa rezultirale su pravilnim radom iste, konačna shema je testirana i moţe se koristiti za izradu novog dizajna tiskane pločice.This paper describes a step-up DC-to-DC converte, the mathematical model was analyzed, the process of making the printed circuit board and the model was described, the waveforms on the valves and the coil in both operating modes were recorded. The control circuit consists of external reference components, voltage and current feedback loop and an integrated circuit UC3843 which controls the valve by means of a pulse-width modulated rectangular signal. The paper describes the problems that arose in making of the model according to the original scheme and describes procedures that were taken to eliminate those problems. The resulting modifications of the model resulted in the proper operation, the final scheme was tested and can be used to create a new design of the printed circuit board