News
STMicroelectronics reveals new family of 100V trench Schottky rectifier diodes for increased efficiency and power density
10/04/2024Target applications include power supplies for telecom, server, and smart-metering equipment, as well automotive LED lighting or low-voltage DC/DC converters
STMicroelectronics has introduced 100V 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 significantly reduce the rectifier losses, with superior 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.
When combined with ST’s flyback and buck-boost converters, such as the VIPer controllers and HVLED001A offline LED driver, the 100V 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 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.
100 V trench Schottky diodes for industrial and automotive applications
The 100 V trench Schottky diodes are available in surface mount versions covering a total of 28 industrial– and automotive-grade devices.
Compared to standard power Schottky diodes, the voltage drop of this diode family is 100 mV lower, which along with lower switching losses, render the new 3 A 100 V trench Schottky diode in SOD-128F flat package ideal for LED lighting and other applications involving high-frequency and high-temperature operation.
Key features
- Higher performance and system efficiency
- Optimized for high frequency switching applications
- Wide range of space-saving package options
Key applications
Automotive
LED lighting
Reverse battery protection
Low voltage DC-DC converters
Industrial
Auxiliary power supply
Switched-mode power supply (SMPS)
Difference in efficiency between trench power Schottky and standard power Schottky diodes
Trench Schottky diodes have even higher efficiency than standard Schottky diodes due to their low forward voltage drop and fast switching capability. This means they produce less heat and are more energy efficient, making them ideal for high-performance applications that require low power consumption and high reliability.
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