Abstract: A control circuit for a switch-mode power supply, a power circuit, and an electronic device. The control circuit outputs a control signal to control a switching frequency of the switch-mode power supply. The control circuit adjusts, in a plurality of cycles, a frequency of the control signal based on a plurality of ranges, and controls, in each cycle, the frequency of the control signal to change with time in a range corresponding to each cycle. In the embodiments, a frequency-domain energy dispersion degree of the control signal output by the control circuit can be increased, electromagnetic interference generated by the control signal output by the control circuit is reduced, and finally, it is ensured that the power circuit and the electronic device including the power circuit can pass a related security test.

Abstract: An Active Clamp Flyback (ACF) converter includes a transformer module, a clamping module, and a controller. The controller is configured to: after the transformer module starts secondary side discharging, control the clamping module to start receiving leakage inductance power from the transformer module; and after controlling the clamping module to stop receiving the leakage inductance power from the transformer module, control the clamping module to release the leakage inductance power to the transformer module. The leakage inductance power released by the clamping module to the transformer module is used by the transformer module to restore a soft switching state based on the leakage inductance power. In a process of transferring the leakage inductance power to a clamping capacitor, the clamping module is in an enabled state. This reduces a loss caused by the clamping module to the leakage inductance power, and helps reduce overall loss caused by the ACF converter.

Abstract: Embodiments of this application provide charging apparatuses, charging apparatus control methods, and charging systems, and relate to the field of terminal device charging technologies. The charging apparatus includes a rectifier circuit, a transformer, a lower bridge switch, a clamp capacitor, an upper bridge switch, and a controller. The transformer includes a primary coil and at least one secondary coil. The controller is configured to control the upper bridge switch and the lower bridge switch to be alternatively turned on. The controller is further configured to obtain a sampling waveform at a location at which the controller is electrically connected to the transformer when the lower bridge switch is turned off, and, when the sampling waveform is abnormal, turn off the lower bridge switch in a first phase of a next charging cycle. The sampling waveform includes a voltage waveform of the primary coil or a voltage waveform of the secondary coil.

Abstract: This application discloses a chip and a signal level shifter circuit for use on a mobile terminal such as a charger or an adapter. The chip is co-packaged with a first silicon-based driver die and a second silicon-based driver die that are manufactured by using a BCD technology, and a first gallium nitride die and a second gallium nitride die that are manufactured by using a gallium nitride technology. A first silicon-based circuit is integrated on the first silicon-based driver die, a second silicon-based circuit is integrated on the second silicon-based driver die, and a high-voltage resistant gallium nitride circuit is integrated on the first gallium nitride die. In this way, it can be ensured that a second low-voltage silicon-based driver die manufactured by using a low-voltage BCD technology is not damaged by a high input voltage, thereby reducing costs of the chip.

Abstract: Embodiments of the disclosure provide a data transmission method. The method can include receiving a first packet sent by a virtual private network user, wherein the first packet carries a first destination address that does not belong to an address range that has been configured for a virtual private network where the virtual private network user is located, converting the first destination address to a second destination address, generating a second packet according to the second destination address and the first packet, and sending the second packet outside the virtual private network where the virtual private network user is located.

Abstract: This application discloses a chip and a signal level shifter circuit for use on a mobile terminal such as a charger or an adapter. The chip is co-packaged with a first silicon-based driver die and a second silicon-based driver die that are manufactured by using a BCD technology, and a first gallium nitride die and a second gallium nitride die that are manufactured by using a gallium nitride technology. A first silicon-based circuit is integrated on the first silicon-based driver die, a second silicon-based circuit is integrated on the second silicon-based driver die, and a high-voltage resistant gallium nitride circuit is integrated on the first gallium nitride die. In this way, it can be ensured that a second low-voltage silicon-based driver die manufactured by using a low-voltage BCD technology is not damaged by a high input voltage, thereby reducing costs of the chip.

Abstract: An Active Clamp Flyback (ACF) converter includes a transformer module, a clamping module, and a controller. The controller is configured to: after the transformer module starts secondary side discharging, control the clamping module to start receiving leakage inductance power from the transformer module; and after controlling the clamping module to stop receiving the leakage inductance power from the transformer module, control the clamping module to release the leakage inductance power to the transformer module. The leakage inductance power released by the clamping module to the transformer module is used by the transformer module to restore a soft switching state based on the leakage inductance power. In a process of transferring the leakage inductance power to a clamping capacitor, the clamping module is in an enabled state. This reduces a loss caused by the clamping module to the leakage inductance power, and helps reduce overall loss caused by the ACF converter.

Abstract: An automation component includes a display having addressable locations in an array for display of data, and control circuitry that is configured to control the display. In a first mode, the control circuitry controls illumination of one or more individual locations of the display in the array for conveying individual data corresponding to the individual locations. In a second mode, the control circuitry controls illumination of two or more individual locations in the array to display an amalgamated alphanumeric character.

Abstract: Embodiments of the disclosure provide a data transmission method. The method can include receiving a first packet sent by a virtual private network user, wherein the first packet carries a first destination address that does not belong to an address range that has been configured for a virtual private network where the virtual private network user is located, converting the first destination address to a second destination address, generating a second packet according to the second destination address and the first packet, and sending the second packet outside the virtual private network where the virtual private network user is located.

Abstract: A method and an apparatus of generating rule tables for a virtual dedicated network, and a routing method are disclosed. The method includes determining virtual switches which act as switching nodes in a virtual dedicated network based on topological structure information of the virtual dedicated network; and using network identifiers of the virtual switches as keywords to configure and generate rule tables of the virtual dedicated network, the rule tables including at least the keywords which act as addresses of the switching nodes in the rule tables. The embodiments of the present disclosure can greatly reduce the number of table items in a rule table in a virtual dedicated network, and reduce the number of table items of transfer nodes and an amount of data of management and control nodes, thus effectively improving the system performance.

Abstract: An automation component includes a display having addressable locations in an array for display of data, and control circuitry that is configured to control the display. In a first mode, the control circuitry controls illumination of one or more individual locations of the display in the array for conveying individual data corresponding to the individual locations. In a second mode, the control circuitry controls illumination of two or more individual locations in the array to display an amalgamated alphanumeric character.