| 摘要 |
<p>A zero-power-consumption and power-saving socket circuit comprises an EMC circuit (1) connected to the electric supply, a switch power supply circuit (2) connected to the EMC circuit, a back stage direct current power supply circuit (3) connected to the switch power supply circuit, a relay (4) connected to an external power utilization load and used for opening or closing a power utilization load power supply, and a main control unit (5) connected to the relay and used for controlling opening and closing of the relay. A power supply input end of the main control unit is connected to an output end of the back stage direct current power supply circuit. The switch power supply circuit comprises a switch power supply chip (31), a current amplification and starting circuit (32), a current feedback circuit (33), and a voltage feedback circuit (34). The zero-power-consumption and power-saving socket circuit merely needs to provide weak standby power required by a main control unit when in a standby state.</p> |
