100V silicon trench Schottky rectifier diodes boost efficiency

100V silicon trench Schottky rectifier diodes boost efficiency

New Products |
By Nick Flaherty

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

Target applications for the trench Schottky diodes include power supplies for telecom, server, and smart-metering equipment, as well automotive LED lighting or low-voltage DC-DC converters

At increased switching frequencies, the energy losses in conventional planar diodes, including silicon Schottky diodes used as rectifiers become a significant factor limiting conversion efficiency. ST’s trench diodes significantly reduce the rectifier losses, with improved forward-voltage and reverse-recovery characteristics that enable increased power density with high efficiency.

The forward voltage is 50-100mV 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 new family, with eight current ratings from 1A to 15A, 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°C to 175°C.

The trench diodes can be combined with ST’s flyback and buck-boost converters, such as the VIPer controllers and HVLED001A offline LED driver for switched-mode power supplies and 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 to ensure device robustness and system reliability. They are available in DPAK as well as SOD123 Flat, SOD128 Flat, SMB Flat, and PSMC (TO227A) surface-mount packages.

All devices are in production now. Pricing starts at $0.107 for the 1A STPST1H100ZF in SMD123 Flat.


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