High-Frequency SiC MOSFETs
SiC MOSFETs offer superior switching performance and higher thermal conductivity, enabling more compact and efficient power systems in EVs, solar inverters, and industrial drives.
| Parameter | Si MOSFET | Si IGBT | SiC |
|---|---|---|---|
| Switching Frequency | High (>20 kHz) | Medium/Low (5 kHz - 20 kHz) | High (>50 kHz) |
| Basic Protection | None | Desaturation protection, Miller clamp | Current sensing, Miller clamp |
| VDD Maximum Rating | 20 V | 30 V | 30 V |
| VDD Clamping | 0 - 20 V | 10 - 20 V | -5 to 25 V |
| Operating VDD | 10 - 12 V | 12 - 15 V | 15 - 18 V |
| UVLO (Undervoltage Lockout) | 8 V | 12 V | 12 - 15 V |
| CMTI (Common Mode Transient Immunity) | 50 - 100 V/ns | < 50 V/ns (less critical) | > 100 V/ns |
| Propagation Delay | The lower, the better (<50 ns) | Not critical | The lower, the better (<50 ns) |
| Power Rail Voltage | Up to 650 V | > 650 V | > 650 V |
| Typical Applications | Power supplies (servers, data communication), telecom, industrial automation, EV/HEV on-board chargers, solar microinverters and string inverters (<3 kW), 400 V to 12 V DC/DC converters in vehicles | Motor drives (AC motors), UPS, central and string solar inverters (>3 kW), automotive traction inverters | PFC power supplies, photovoltaic inverters, used in EV/HEV DC/DC converters and traction inverters, motor drives, rail applications |
SiC MOSFETs offer superior switching performance and higher thermal conductivity, enabling more compact and efficient power systems in EVs, solar inverters, and industrial drives.
Si IGBTs remain widely used in motor drives and high-power applications due to their robustness, though at the cost of lower switching speed and higher losses compared to SiC.
Widely used in medium-voltage applications with high switching speed but lower thermal efficiency.
High efficiency, ideal for fast switching and high-voltage designs like EV traction and power supplies.
Reduced conduction and switching losses for improved energy savings.
Enables smaller and lighter systems in automotive and industrial applications.
Minimized EMI and optimized power density thanks to SiC technology.
SiC MOSFETs offer superior switching performance and higher thermal conductivity, enabling more compact and efficient power systems in EVs, solar inverters, and industrial drives.
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