Cascode Configuration Eases Challenges of Applying SiC JFETs
نویسنده
چکیده
After explaining the basic operation of a SiC JFET plus silicon MOSFET cascode circuit, the dynamics of cascode switching will be discussed and the use of a QRR tester to evaluate the reverse-recovery characteristics of a cascode circuit will be explained. A comparison of the cascode’s reverse recovery with that of a SiC MOSFET reveals that the JFET cascode actually performs better than the SiC MOSFET over temperature.
منابع مشابه
SiC vs. Si – Evaluation of Potentials for Performance Improvement of Power Electronics Converter Systems by SiC Power Semiconductors
Switching devices based on wide band gap materials as SiC offer a significant performance improvement on the switch level compared to Si devices. A well known example are SiC diodes employed e.g. in PFC converters. In this paper, the impact on the system level performance, i.e. efficiency/power density, of a PFC and of a DC-DC converter resulting with the new SiC devices is evaluated based on a...
متن کاملStability and performance analysis of a SiC-based cascode switch and an alternative solution
Wide band-gap semiconductors are most attractive as materials for power devices due to low losses, improved temperature capability and high thermal conductivity. Although silicon carbide Schottky diodes have been commercially available on the market for years, an active wide bandgap switch is still missing. Probably the best performance of upcoming devices is gained with normally-on concepts su...
متن کاملSiC versus Si - Evaluation of Potentials for Performance Improvement of Inverter and DC-DC Converter Systems by SiC Power Semiconductors
Switching devices based on wide bandgap materials such as silicon carbide (SiC) offer a significant performance improvement on the switch level (specific on resistance, etc.) compared with Si devices. Well-known examples are SiC diodes employed, for example, in inverter drives with high switching frequencies. In this paper, the impact on the system-level performance, i.e., efficiency, power den...
متن کاملStudy and Analysis of A Simple Self Cascode Regulated Cascode Amplifier
This article proposed a simple self cascode RGC amplifier configuration to increase the gain and bandwidth. The cascode amplifier eliminates the miller capacitance between input and output and facilitates high gain, high input and output impedance with high bandwidth. However, the cascode amplifier requires relatively high supply voltage for proper operation and it decreases the output voltage ...
متن کاملEfficiency Improvement with Silicon Carbide Based Power Modules - ISSUE 6 – SEPTEMBER 2009
Whereas SiC switches have the overall lowest dynamic losses, they show higher static losses due to the lack of conductivity modulation and the necessary chip size limitations due to the still high SiC base material price. The frequency dependence of the total losses of the various 1200V configurations (Si-IGBT + Si freewheeling diode, Si IGBT + SiC Schottky diode, SiC-JFET cascode plus internal...
متن کامل