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    • 4. 发明申请
    • POWER RECEIVING CONTROL DEVICE, POWER RECEIVING DEVICE, AND ELECTRONIC APPARATUS
    • US20100013321A1
    • 2010-01-21
    • US12503366
    • 2009-07-15
    • Kota ONISHIMasayuki KAMIYAMANobutaka SHIOZAKIKentaro YODATakahiro KAMIJO
    • Kota ONISHIMasayuki KAMIYAMANobutaka SHIOZAKIKentaro YODATakahiro KAMIJO
    • H01F38/14
    • G08C17/04H01F2038/143H02J7/025H02J50/12H02J50/60H02J50/80H02J50/90
    • A power receiving control device provided to a power receiving device included in a contactless power transmission system that transmits electric power from a power transmission device to the power receiving device by electromagnetically coupling a primary coil and a secondary coil so as to feed the electric power to a load serving as a power feeding object from a voltage output node of the power receiving device, which includes a rectifying circuit and a regulator; and transmits a load modulation signal to the power transmission device by load modulation performed by a load modulation section included in the power receiving device, in a period of the power feeding to the load as the power feeding object, includes a power receiving side control circuit controlling an operation of the power receiving device; and a power supply control signal output terminal for outputting a power supply control signal by which the power feeding to the load is temporarily stopped In the device, the power receiving side control circuit turns on a switch circuit provided between an input node and an output node of the regulator, based on detection of lowering of power feeding capability to the load, so as to put a bypass path, which directly connecting the input node and the output node of the regulator, in an ON state; turns off the switch circuit so as to forcibly put the bypass path in an OFF state, in a case where the power feeding to the load is temporarily stopped in a period during which the bypass path is formed, at one of timing at which a voltage level of the power supply control signal outputted from the power supply control signal output terminal is switched from a non-active level to an active level so as to temporarily stop the power feeding to the load and timing before the power feeding to the load is temporarily stopped; and turns on the switch circuit after releasing the temporary stop of the power feeding to the load so as to return the bypass path to the ON state.