STMicroelectronics 100 V trench Schottky rectifier diodes

STMicroelectronics has introduced a range of 100 V trench Schottky rectifier diodes that boost efficiency in power converters operated at high switching frequencies.

Raising power-converter operating frequency, encouraged by the minimal switching losses of technologies like wide-bandgap semiconductors, allows designers to set new benchmarks in power density. However, at elevated frequencies, the energy losses in conventional planar diodes, including silicon Schottky devices, used as rectifiers become a significant factor limiting conversion efficiency.

ST’s trench Schottky diodes reduce the rectifier losses, with forward-voltage and reverse-recovery characteristics that enable increased power density with high efficiency. The forward voltage is said to be 50–100 mV better than in comparable planar diodes, depending on current and temperature conditions. Simply changing to these devices can increase the efficiency by 0.5%.

There are 28 variants in the family, with eight current ratings from 1 to 15 A and multiple surface-mount packages, in industrial and automotive grades. The industrial-grade parts target applications such as miniature switched-mode power supplies and auxiliary power supplies for telecom, server and smart-metering equipment. In automotive, typical uses include space-constrained applications such as LED lighting, reverse-polarity protection and low-voltage DC/DC converters. The parts are AEC-Q101 qualified, manufactured in PPAP-capable facilities and specified from -40 to 175°C.

When combined with ST’s flyback and buck-boost converters, the 100 V trench Schottky rectifiers fulfil the active-components bill of materials for switched-mode power supplies. All are supported in ST’s eDesign Suite Rectifier Diodes Simulator, which helps to select the rating and footprint, simulate waveforms and estimate power efficiency.

The diodes are 100% avalanche tested in production for device robustness. They are available in DPAK as well as SOD123 Flat, SOD128 Flat, SMB Flat and PSMC (TO227A) surface-mount packages.