Infineon wins first MOSFET refrigerator inverter design

Business news |
By Nick Flaherty

Infineon Technologies has supplied Samsung Electronics with MOSFET power devices to couple the highest energy efficiency with lowest audible noise.

The CoolMOS PFD7 MOSFEts and EiceDriver gate drivers have been integrated in Samsung’s brand new one-door fridge (RR23A2J3XWX, RR23A2G3WDX) and FDR (French Door Fridge: RF18A5101SR) inverter for its refrigerators. Using a DC to AC inverter helps the application run more quietly and smoothly while the average power consumption is reduced compared to a traditional on/off control.

The inverter designs use Infineon’s EiceDRIVER gate-driver IC, CoolSET Gen 5 for AC-DC conversion, and 600V CoolMOS PFD7 for compressor drives. This is Samsung’s first refrigerator design that uses discrete devices instead of power modules in the compressor.

The 600 V CoolMOS PFD7 superjunction MOSFETs come with a body diode allowing for improved soft-recovery index and the industry’s fastest reverse recovery time (trr), making them a perfect choice for home appliance motor drives. Compared to module-based designs, using MOSFETs enables lower energy consumption especially at light-load conditions and an efficiency increase as of 1.7 percent. In addition, this innovative approach allows for a heatsink-less design, a 10 percent reduction in system cost and a longer refrigerator lifetime.

“Up to now, the major home appliances market was strongly dominated by modules. It was exciting to see that with our leading MOSFET technologies, we could help our customer Samsung to achieve even higher efficiency levels at lower system cost in such applications”, said Stefan Obersriebnig, Product Line Head High Voltage Conversion of Infineon’s Power & Sensor System Division.

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