Title :
Evaluation of the operation of depletion-mode SiC power JFET in DC-DC converter applications
Author :
Bacmaga, Josip ; Bene, Kristijan ; Pejcinovic, Branimir ; Baric, Adrijan
Author_Institution :
Fac. of Electr. Eng. & Comput., Univ. of Zagreb, Zagreb, Hungary
Abstract :
This paper presents the system for the evaluation of operation of a depletion-mode silicon carbide (SiC) power junction field-effect transistor (JFET). The main part of the system is a dc-dc step-down converter which represents realistic operating conditions for the switching devices in a synchronous buck configuration. In order to test the importance of the dead-time value on the operation and efficiency of the synchronous buck converter, a precise two-channel time-delay pulse signal generator is developed and its operation is described. The ability to precisely regulate control signal parameters of the high-side FET and low-side FET (switching voltage and current, operating frequency, duty cycle, dead-times, etc.) is needed in order to fully characterise SiC power switches. The functionality of the complete system is verified by measurements performed under various operating conditions.
Keywords :
DC-DC power convertors; field effect transistor switches; junction gate field effect transistors; power field effect transistors; switched mode power supplies; DC-DC converter applications; SiC; dead time; depletion mode power JFET; duty cycle; junction field effect transistor; operating frequency; step down converter; switching current; switching voltage; synchronous buck converter; time delay pulse signal generator; JFETs; Logic gates; MOSFET; Signal generators; Silicon carbide; Switches; Voltage measurement; SiC JFET; buck converter; time-delay signal generation;
Conference_Titel :
Information and Communication Technology, Electronics and Microelectronics (MIPRO), 2014 37th International Convention on
Conference_Location :
Opatija
Print_ISBN :
978-953-233-081-6
DOI :
10.1109/MIPRO.2014.6859547
