CoolSiC MOSFET 650V family offers high reliability

20th February 2020
Alex Lynn

Infineon Technologies has continued to expand its comprehensive silicon carbide (SiC) product portfolio with MOSFET 650V devices. With the newly launched CoolSiC MOSFETs Infineon is addressing the growing demand for energy efficiency, power density, and robustness in a wide range of applications. Amongst them are server, telecom and industrial SMPS, solar energy systems, energy storage and battery formation, UPS, motor drives as well as EV-charging.

“With this launch, Infineon complements its broad silicon, silicon carbide, and gallium nitride-based power semiconductor portfolio in the 600V / 650V power domain,” said Steffen Metzger, Senior Director High Voltage Conversion at Infineon’s Power Management & Multimarket Division. “It underlines our unique position in the market being the only manufacturer with such a broad offering for all three power technologies. Additionally, the new CoolSiC family supports our claim to be the number one supplier of SiC MOSFET switches for industrial purposes.”

The CoolSiC MOSFET 650V devices are rated from 27mΩ to 107mΩ. They are available in classic TO-247 three-pin as well as TO-247 four-pin packages, which allows for even lower switching losses. As for all previously launched CoolSiC MOSFET products, the new family of 650V devices are based on Infineon’s trench semiconductor technology. 

Maximising the strong physical characteristics of SiC, this ensures that the devices offer superior reliability, best-in-class switching and conduction losses. Additionally, they feature highest transconductance level (gain), threshold voltage (V th) of four volts and short-circuit robustness. Thus, trench technology allows for lowest losses in the application and highest reliability in operation – without any compromise.

The 650V CoolSiC MOSFETs offer attractive benefits in comparison to other silicon and silicon carbide solutions in the market such as switching efficiency at higher frequencies and an outstanding reliability. Thanks to the very low on-state resistance (R DS(on)) dependency on temperature they feature an excellent thermal behaviour. 

The devices boast robust and stable body diodes retaining a very low level of reverse recovery charge (Q rr), roughly 80 percent less compared to the best superjunction CoolMOS MOSFET. The commutation-robustness helps in achieving very easily an overall system efficiency of 98 percent, e.g. through the usage of continuous conduction mode totem-pole power factor correction (PFC).

To ease the application design using CoolSiC MOSFETs 650V and to ensure high performance operation of the devices, Infineon offers dedicated one-channel and two-channel galvanically isolated EiceDRIVER gate-driver ICs. This solution – combining CoolSiC switches and dedicated gate-driver ICs – helps lowering system costs as well as total cost of ownership and enables energy efficiency gains. The CoolSiC MOSFETs also work seamlessly with other ICs from Infineon’s EiceDRIVER gate-driver family.

The CoolSiC MOSFET 650V family comprises eight variants housed in two through hole TO-247 packages. They can be ordered now. Three dedicated gate-driver ICs will be available starting March 2020.

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