400V and 440V MOSFETs for high-power and compute-intensive applications

Infineon Technologies AG has expanded its CoolSiC MOSFETs 400V G2 portfolio with the top-side-cooled (TSC) TOLT package as well as the TO-247-3 and TO-247-4 packages. Also, three new products in the TOLL package have been introduced, with rated voltages of 440V (continuous) and 455V (transient). The new CoolSiC MOSFETs offer enhanced thermal performance, improved system efficiency, and increased power density. They have been specifically designed to fulfil the demands of high-power and compute-intensive applications, including AI server power supplies, solar inverters, uninterruptible power supplies, Class D audio amplifiers, motor drives, and solid-state circuit breakers. For these critical systems, the devices provide the needed reliability and performance.

Compared to existing Si technologies in the 250V and 300V voltage classes, CoolSiC G2 400V and 440V MOSFETs achieve up to 50% lower conduction losses at an operating temperature of 120C, thanks to their flat R(DS(on) as a function of junction temperature (Tj). They also feature greatly improved switching FOM, resulting in at least five times lower reverse recovery charge. At the system level, these MOSFETs in a three-stage flying-capacitor CCM totem-pole PFC achieved up to 0.4 percentage points higher peak PSU efficiency compared to a state-of-the-art interleaved two-level CCM totem-pole PFC. This translates into approximately 15% lower system losses at peak efficiency.