Protection Circuit for Ethernet and Power Sourcing Equipment Having the Same
AssigneeNlightning Technology Ltd.
InventorsKun Tsen Lin, Shih Peng Wu
Life of this patent
Estimating the term…
Abstract
A protection circuit for Ethernet and a power sourcing equipment having the same are provided. The protection circuit is coupled between a power supply chip and a transmission circuit. The transmission circuit is coupled between an Ethernet chip and an Ethernet connector. The protection circuit includes a bridge rectifier and a protection element to provide the common mode surge protection and the differential mode surge protection at the same time for the power supply chip.
Claims20
A protection circuit for Ethernet, the protection circuit being configured to be coupled between a power supply chip and a transmission circuit, the transmission circuit being coupled between an Ethernet chip and an Ethernet connector, the protection circuit comprising:
- a first input pin, being configured to be coupled to the power supply chip;
- a second input pin, being configured to be coupled to the power supply chip;
- a first output pin, being configured to be coupled to a first transmission component set of the transmission circuit;
- a second output pin, being configured to be coupled to a second transmission component set of the transmission circuit;
- a first ground pin, being configured to be coupled to a ground;
- a first bridge rectifier having four contacts coupled to the first input pin and the first output pin, the second input pin, the second output pin, and the first ground pin respectively;
- and
- a first protection component, being coupled between the first output pin and the second output pin.
A power sourcing equipment, comprising:
- an Ethernet chip;
- an Ethernet connector;
- a power supply chip;
- a transmission circuit, being coupled between the Ethernet chip and the Ethernet connector;
- a protection circuit, being coupled between the power supply chip and the transmission circuit, the protection circuit comprising:
- a first input pin coupled to the power supply chip;
- a second input pin coupled to the power supply chip;
- a first output pin coupled to a first transmission component set of the transmission circuit;
- a second output pin coupled to a second transmission component set of the transmission circuit;
- a first ground pin coupled to a ground;
- a first bridge rectifier having four contacts coupled to the first input pin and the first output pin, the second input pin, the second output pin, and the first ground pin respectively;
- and
- a first protection component coupled between the first output pin and the second output pin.
Dependencies are inferred from the claim text.