Patent ID: 11962426
Assignee: DELTA ELECTRONICS, INC.
Field: Digital communication (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 7:
8. An Ethernet power supply configured to receive a DC voltage, and coupled to a load device, the Ethernet power supply comprising:
a first control module, configured to receive the DC voltage through a bus positive terminal and a bus negative terminal, and coupled to a negative end of the load device through the bus negative terminal so as to provide a first control signal through the bus negative terminal to confirm whether the load device is a valid load, and a second control signal is provided from a communication terminal to ground the bus negative terminal after the load device is confirmed as the valid load, and
a second control module, coupled to a power terminal of the first control module and the bus positive terminal, and the second control module comprising:
a switch unit, coupled to the bus positive terminal and the power terminal, and configured to provide a lock-on state to connect a coupling relationship between the power terminal and the bus positive terminal according to the load device being connected, and provide an unlock-off state to disconnect the coupling relationship between the bus positive terminal and the power terminal according to the load device being disconnected,
a trigger component, coupled to the bus negative terminal and the switch unit, and configured to trigger the switch unit to be the lock-on state according to the increase of a terminal voltage of the bus negative terminal, and
an unlock circuit, coupled to the communication terminal and the switch unit, and configured to build an unlock voltage according to the second control signal, and control the switch unit to be the unlock-off state through the unlock voltage when the negative end of the load device is disconnected from the bus negative terminal.