- 专利标题: HIGH RELIABILITY AC LOAD SWITCHING CIRCUIT
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申请号: US16385020申请日: 2019-04-16
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公开(公告)号: US20190245537A1公开(公告)日: 2019-08-08
- 发明人: Yuequan Hu , Amruteshwar Hiremath , Kory A. Liszt
- 申请人: Cree, Inc.
- 主分类号: H03K17/68
- IPC分类号: H03K17/68 ; H03K17/72
摘要:
A high reliability AC load switching circuit is disclosed. In some embodiments, the AC load switching circuit includes a high-speed switch connected between the load and the voltage source, a cutoff switch connected between the load and the voltage source in parallel with the high-speed switch, and a level detector connected to the voltage source and to a control input of the high-speed switch. The high-speed switch may be a solid-state switch, for example, a TRIAC or a bidirectional switch, and the cutoff switch may be an electromechanical switch, for example, a relay. In some embodiments a snubber is connected in parallel with a solid-state switch. In some embodiments a microcontroller is connected to an electromechanical switch and the level detector. In some embodiments, both a first cutoff switch and a second cutoff switch are used.