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Rad-hard MOSFETs designed for satellite use

Posted: 08 Jun 2011     Print Version  Bookmark and Share

Keywords:satellite  power  mosfet  radiation hardened 

STMicroelectronics introduces the first member of a family of power transistors that are fully qualified for use in electronic sub-systems on board satellites and launchers to cater to the growing worldwide demand for satellite-based communications, television, weather forecasting and geographical data.

The radiation-hardened power MOSFET family spans current ratings from 6–80A and comprises five N-channel and P-channel devices, including: the STRH100N10 and STRH8N10 and STRH40P10, which offer voltage ratings of 100V; and the STRH100N6 and STRH40N6 with voltage ratings of 60V. The 100V P-channel device has a current rating of 34A. With their low gate charge, a characteristic of ST's STripFET technology which enhances switching performance, they are targeted for use in DC power modules such as motor controllers and linear regulators, as well as line switches and e-fuses for current limiting.

Major features of ST space-qualified power MOSFETs include: 1) fast switching performance; 2) 100 per cent avalanche tested; 3) hermetically sealed package; 4) withstands 70/100krad Total Ionizing Dose (TID); and 5) SEE radiation hardened.

According to the Satellite Industry Association, the global satellite industry is growing steadily and currently generates more than Rs.7.14 lakh crore ($160 billion) in annual revenues. Although essential electronic equipment is built in various territories, including Europe and Asia, the majority of components certified for use in space originate from the USA. However, developed in conjunction with the support of the European Space Agency (ESA) and the Centre National d'Etudes Spatiales (CNES), ST's new family of radiation-hardened power MOSFETs is produced in Europe and fully qualified to ESCC (European Space Components Coordination) specifications.

"This new Rad-Hard Power MOSFET family has been developed to meet space requirements and is available for the first time from a European manufacturer," said Ian Wilson, General Manager of ST's Power Transistors Division.

The STRHxxxN10, STRHxxxN6 and STRH40P10 family are available now to EM (Engineering Model) or ESCC flight quality level, in TO254-AA and TO-39 through-hole packages. An SMD.5 surface-mount configuration is also offered. The STRH100N10 is qualified to the ESCC 5205/021 specification and the other products are expected to be ESCC qualified in 2H 2011.

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