Hybrid module combining SIC MOSFETs and IGBTs for 99 percent efficiency

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By Nick Flaherty

Compared with traditional three level neutral-point-clamped topologies, the newly developed advanced neutral-point-clamped (ANPC) inverter design of the hybrid module supports an even loss distribution between semiconductor devices. This is used in the 1200V EasyPACK 2B power module that combines the CoolSiC MOSFET and the TRENCHSTOP IGBT4 chipsets with a switching frequency of up to 48 kHz. This is aimed at the next generation of 1500 V photovoltaic and energy storage applications.

The ANPC topology supports a system efficiency of more than 99 percent. Implementing the hybrid Easy 2B power module in the DC-AC stage of a 1500 V solar string inverter allows for coils to be smaller than with devices with a lower switching frequency. It therefore weighs significantly less than a corresponding inverter with purely silicon components. As the losses with silicon carbide are smaller than with silicon less heat has to be dissipated so the heat sink can be smaller. Overall, this leads to smaller inverter housings and costs savings at system level. Compared to five level topologies, the three level design reduces complexity of the inverter design.

The Easy 2B hybrid module package is characterized by an industry-leading low stray inductance. Additionally, the integrated body diode of the CoolSiC MOSFET chip ensures a low-loss freewheeling function without the need for another SiC diode chip. While the NTC temperature sensor facilitates the monitoring of the device, the PressFIT technology reduces assembly time for mounting the device.

The hybrid EasyPACK 2B (F3L11MR12W2M1_B65) can be ordered now.

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