Wireless Charging System With Protection Circuitry

    公开(公告)号:US20180233942A1

    公开(公告)日:2018-08-16

    申请号:US15655628

    申请日:2017-07-20

    Applicant: Apple Inc.

    CPC classification number: H02J7/027 H02J7/025 H02J50/10 H02J50/12

    Abstract: A wireless power transmitting device transmits wireless power signals to a wireless power receiving device. The wireless power receiving device has a rectifier and a wireless power receiving coil that receives wireless power signals. The rectifier is coupled to an integrated circuit such as a battery charger integrated circuit. One or more capacitors are coupled between input terminals for the rectifier and the wireless power receiving coil. The rectifier has output terminals at which the rectifier provides direct-current output power corresponding to the wireless power signals received with the wireless power receiving coil. Protection circuitry is coupled to one or more nodes located between the wireless power receiving coil and the capacitors. Control circuitry turns on one or more transistors in the protection circuitry in response to measurements made with sensor circuitry coupled to the output terminals.

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