Patent ID: 9407109
Filing Date: 2016-08-02
CPC Classification: H01M,H02J,Y02E

Claim Text:
1. A contact-less charger which, in operation, charges, in a contact-less manner, an electronic device using a secondary battery as a power source, the contact-less charger comprising: a driver circuit; a controller coupled to the driver circuit, wherein the controller, in operation, controls the driver circuit to intermittently transmit a load check signal for checking whether or not the electronic device is placed on the charger, while the contact-less charger is in a charge stop state in which the charger does not charge the electronic device; wherein the controller checks a load in response to the load check signal, and controls the driver circuit to intermittently transmit an authentication request command for requesting an authentication of the electronic device; wherein, in a case that the controller authenticates the electronic device based on a signal received in response to the transmission of the authentication request command, the controller controls the driver circuit to start charging to the electronic device; and wherein a transmission interval of the load check signal is larger than a transmission interval of the authentication request command.