TVS Structure and Process Design for Lightning Protection Requirements of Airborne Discrete Chip Interface
With the development of aviation technology,electronic equipment and facilities have been widely used in airborne systems.As one of the most important signals of aircraft avionics systems,discrete signals are used in electromechanical control signals,equipment status indication signals and other scenarios.The discrete signal has the characteristics of simple generation circuit and strong anti-interference ability,which makes it very suitable for signal transmission in the harsh electromagnetic environment on board.However,it also puts forward extremely high requirements for the reliability of airborne discrete processing chip.Therefore,lightning protection has become a necessary consideration in the design process of airborne discrete processing chip.Aiming at the lightning protection requirements of the signal interface of the airborne discrete processing chip,this paper proposes a TVS array and its corresponding process design as a lightning protection device for the airborne discrete processing chip based on the improved BCD process.After testing,the TVS current capability reaches 5.26A,and can withstand±11kV ESD stress.It has strong surge and lightning protection capabilities,so it can provide strong lightning and ESD protection for high-speed data interfaces in airborne discrete processing chips,and has strong application value.
airborne systemdiscrete quantitylighting protectionTVShigh-speed data interface
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