Wide-SOA Trench MOSFET Enables Rugged Linear-Mode Operation

Focus:

An advanced trench MOSFET (STMicroelectronics’ STH200N10WF7-2) offers improved linear-mode ruggedness, thus providing excellent performance in 48-V telecom, server, industrial and motor drive applications. This article describes some of the applications requiring a combination of linear-mode and ohmic-region performance, explaining how their requirements influence the optimization of MOSFET characteristics in the design of ST’s new wide-SOA device. Specifically, the article discusses the influence of the thermal coefficient of the drain current on SOA and linear-mode operation, and compares this characteristic in the wide-SOA trench MOSFET versus a standard STripFET F7 series trench MOSFET. It also compares the transfer characteristics and drain current stability of these two devices against the best competing device (in terms of linear-mode ruggedness) on the market. Finally, the linear-mode operation of the wide-SOA device is assessed in a telecom-type hot-swap application versus that of existing trench MOSFETs.

What you’ll learn:

• How to improve linear-mode ruggedness of trench power MOSFETs by using a wide-SOA device

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Author & Publication:

Filippo Scrimizzi and Giusy Gambino, STMicroelectronics, Catania, Italy, How2Power Today, Apr 15 2022

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