Wolfspeed, a Cree Company, which like Cree is also headquartered in Durham North Carolina USA, has released a SiC power module that passes the harsh environment qualification test. The test simultaneously puts the power module in high-humidity, high-temperature, and high-voltage conditions. According to Wolfspeed, this reliability benchmark enables system designers to employ the module in outdoor applications including wind turbines, transportation, solar and other renewables.
The device can continue operating in extreme environmental conditions that have historically challenged safe device operation. During the testing, the new all-SiC module, rated for 300 A and 1.2 kV blocking, was forced to operate in an environment with 85°C ambient temperature, 85 percent relative humidity, while biased at 80 percent of rated voltage (960V). Michel Piton, semiconductor master expert at Alstom, a leading global supplier of systems,
Michel Piton, semiconductor master expert at Alstom, a leading global supplier of systems, equipment, and services for the railway market stated, “Achieving March 2017 the benchmark for temperature and humidity under high bias voltage is a key milestone for SiC devices in its adoption into our demanding market.”
Wolfspeed SiC Power Module Performance
The power module utilizes the company’s newGen5 Schottky diodes and MOSFETs (CPM2-1200-0025A) that also pass the harsh environment test at the die level. The new module retains its low 4.2 mΩ on-resistance and boasts switching losses that are less than one-fifth of the similarly rated, latest generation IGBT modules. Along with optimized assembly methods, the module construction uses high thermal conductivity aluminum nitride substrates to meet the thermal and power cycling requirements of the industry.
John Palmour, Wolfspeed’s chief technology officer commented, “The latest 1200V module demonstrates our commitment to enabling markets and applications by meeting the anticipated system requirements for 2020 and beyond.”
The company says that the component, part number WAS300M12BM2, can be driven by existing Wolfspeed gate drivers for 62mm modules.
PCIM 2017 attendees can learn more about the new module at Hall 9, Booth 242.