Abstract: The present invention discloses a control method and a control apparatus for a Flyback circuit. The Flyback circuit includes a primary switch, a secondary rectifier unit, a transformer and an output capacitor. The secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively. In the control method for a Flyback circuit, after the secondary rectifier unit is controlled to be turned on once or twice according to the input voltage and/or output power of the Flyback, the primary switch is turned on to achieve the zero-voltage-switching. According to the invention, the zero-voltage-switching (ZVS) of the primary switch can be achieved under the entire input voltage range and the entire load range without adding additional power devices.

Abstract: The present invention discloses a control method and a control apparatus for a Flyback circuit. The Flyback circuit includes a primary switch, a secondary rectifier unit, a transformer and an output capacitor. The secondary rectifier unit includes a first terminal and a second terminal, which are electrically connected to the transformer and the output capacitor, respectively. In the control method for a Flyback circuit, after the secondary rectifier unit is controlled to be turned on once or twice according to the input voltage and/or output power of the Flyback, the primary switch is turned on to achieve the zero-voltage-switching. According to the invention, the zero-voltage-switching (ZVS) of the primary switch can be achieved under the entire input voltage range and the entire load range without adding additional power devices.

Abstract: The present application discloses an adapter, an electronic device and a wireless communication system, wherein the adapter comprises a first information acquiring unit for acquiring adapter information of the adapter and/or electronic device information from an electronic device, and a first wireless communication unit electrically connected to the first information acquiring unit and configured to perform at least one of the following operations in a wireless way: transmitting the adapter information to the electronic device, and receiving the electronic device information from the electronic device. Various information can be communicated between the adapter and the electronic device in the present application.

Abstract: The present application discloses an adapter, an electronic device and a wireless communication system, wherein the adapter comprises a first information acquiring unit for acquiring adapter information of the adapter and/or electronic device information from an electronic device, and a first wireless communication unit electrically connected to the first information acquiring unit and configured to perform at least one of the following operations in a wireless way: transmitting the adapter information to the electronic device, and receiving the electronic device information from the electronic device. Various information can be communicated between the adapter and the electronic device in the present application.