US 12,149,097 B2
Wireless power reception circuit system
Norikazu Sakamoto, Nagaokakyo (JP); and Tatsuya Hosotani, Nagaokakyo (JP)
Assigned to Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed by Murata Manufacturing Co., Ltd., Kyoto-fu (JP)
Filed on May 2, 2023, as Appl. No. 18/311,162.
Application 18/311,162 is a continuation of application No. PCT/JP2021/040474, filed on Nov. 3, 2021.
Claims priority of application No. 2020-190069 (JP), filed on Nov. 16, 2020.
Prior Publication US 2023/0275465 A1, Aug. 31, 2023
Int. Cl. H02J 50/12 (2016.01); H02J 7/00 (2006.01); H02J 50/80 (2016.01); H02M 3/157 (2006.01)
CPC H02J 50/12 (2016.02) [H02J 7/00308 (2020.01); H02J 7/007 (2013.01); H02M 3/157 (2013.01); H02J 50/80 (2016.02)] 20 Claims
OG exemplary drawing
 
1. A wireless power reception circuit system comprising:
a wireless power reception circuit;
an electric storage device;
a load circuit configured to consume power received by the wireless power reception circuit or power in the electric storage device;
a digital control circuit configured to consume power received by the wireless power reception circuit or power in the electric storage device and to perform control processing to supply or stop supplying power received by the wireless power reception circuit and power in the electric storage device to the load circuit;
an electric storage device voltage conversion circuit configured to convert a voltage of the electric storage device into a predetermined power supply voltage;
a reception voltage conversion circuit configured to convert a voltage received by the wireless power reception circuit into a predetermined power supply voltage;
a smoothing capacitor configured to smooth a power supply voltage for the digital control circuit;
a voltage OR circuit configured to, when an output voltage of the reception voltage conversion circuit is higher than an output voltage of the electric storage device voltage conversion circuit, supply the output voltage of the reception voltage conversion circuit as power for the digital control circuit and configured to, when an output voltage of the reception voltage conversion circuit is lower than an output voltage of the electric storage device voltage conversion circuit, supply an output voltage of the electric storage device as power for the digital control circuit; and
an external signal setting circuit configured to reset the digital control circuit in response to an external signal,
wherein
an enable signal input terminal of the electric storage device voltage conversion circuit is in a disabled state when the electric storage device voltage conversion circuit is not controlled by the digital control circuit, and
the digital control circuit is configured to supply an enable signal to the enable signal input terminal of the electric storage device voltage conversion circuit when operating the electric storage device voltage conversion circuit.