SiC Schottky has negligible reverse recovery for solar inverters and H/EVs

16th May 2016
Caroline Hayes

For applications that demand efficiency, reliability and thermal management, such as solar inverters, EV/HEV charging station, industrial power supplies, industrial drives, welding and plasma cutting, Littelfuse has introduced the LFUSCD series of SiC Schottky diodes.

Compared to standard silicon bipolar power diodes, they allow reduced switching losses, accommodate large surge currents without thermal runaway, and operate at higher junction temperatures, says the company. 

The merged p-n Schottky architecture is claimed to ensure enhanced surge capability and reduced leakage current. Available in 650 and 1,200V ratings at current ratings ranging from 4.0 to 30A.

They can be used for power factor correction (PFC), buck or boost stages in DC/DC converters, free-wheeling diodes in inverter stages (e.g. switch-mode power supplies, solar, UPS, industrial drives) and high frequency output rectification.

Features include what the company believes is best-in-class capacitive stored charge and near-zero reverse recovery. They are also claimed to have best-in-class forward voltage drop for low conduction losses and have maximum junction temperature of 175°C for a larger design margin.

The diodes are available in tubes in TO-220 two-lead and TO-247 three-lead packages.

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