Rohm adds higher voltage SiC power modules for industrial use

Rohm expands its silicon carbide (SiC) power module offering, with 1200V, 400 and 600A models. 

The 1200V 400A/600A-rated full SiC power modules [BSM400D12P3G002/ BSM600D12P3G001] are optimised for inverters and converters in solar power conditioners, uninterruptible power supplies (UPS), and power supplies for industrial equipment.

The BSM600D12P3G001 achieves a rated current of 600A by using a new package featuring an original internal structure and optimised heat radiation design. This enables support for higher power applications, such as large-scale power supplies for industrial equipment, claims Rohm. In addition, switching loss is reduced by 64 per cent (at a chip temperature of 150 degree C) compared with insulated gate bipolar transistor (IGBT) modules at the same rated current. This considerably improves energy savings, says Rohm. In addition to reducing the size of peripheral components through high-frequency operation, the effects of reducing switching loss are greater when driving at high frequencies. This further contributes to the miniaturisation of cooling and other systems. For example, from preliminary calculations based on loss simulation in cooling systems, adopting SiC modules can reduce the size of water-cooled heatsinks by up to 88 per cent, compared with equivalently rated IGBT modules, reports Rohm.

SiC has been increasingly adopted in markets such as automotive and industrial, due to its energy-saving performance, and ability to handle larger currents. In order to maximise the high-speed switching characteristics of SiC – particularly in products with large current ratings such as power modules – it is necessary to develop a new package that suppresses the effects of surge voltage during switching.

Since 2012 Rohm has produced full SiC power modules integrating power semiconductor elements composed entirely of silicon carbide. It has developed high-power products up to 1200V/300A and this new package design expands the SiC module portfolio to cover the key current range from 100 to 600A.

Samples and original equipment manufacturer (OEM) quantities will be available in June 2017.


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