Connector leakage protection system and circuit

Patent metadata

Field	Value
Publication number	US-2016285253-A1
Application number	US-201514691006-A
Country	US
Kind code	A1
Filing date	Apr 20, 2015
Priority date	Mar 25, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

A connector leakage protection system includes a current foldback module with a first end coupled to an output port of a DC power supply; an anti-interference module with a first end coupled to a second end of the current foldback module, and a second end coupled to a power port of a connector; and a leakage protection module between the output port and the first end of the current foldback module, or the second end of the current foldback module and the first end of the anti-interference module, or the second end of the anti-interference module and the power port. When the output port outputs a DC voltage, the leakage protection module is switched on. When the output port does not output the DC voltage, the leakage protection module is switched off, preventing current leakage from flowing to the output port. A connector leakage protection circuit is also provided.

First claim

What is claimed is:

1 . A connector leakage protection system comprising:
a direct current (DC) power supply having an output port; a current foldback module having a first end configured to be coupled to the output port; an anti-interference module having a first end coupled to a second end, opposite the first end, of the current foldback module, and a second end configured to be coupled to a power port of a connector; and a leakage protection module configured to be coupled between the output port and the first end of the current foldback module, the second end of the current foldback module and the first end of the anti-interference module, or the second end of the anti-interference module and the power port; wherein when the output port outputs a DC voltage, the leakage protection module is switched on; and when the output port does not output the DC voltage, the leakage protection module is switched off, thereby preventing current leakage from the power port flowing to the output port.

2 . The connector leakage protection system of claim 1 , further comprising a filtration module, wherein a first end of the filtration module is coupled to the second end of the current foldback module, and a second end of the filtration module is grounded.

3 . The connector leakage protection system of claim 2 , wherein a connection node is defined between the filtration module and the current foldback module; the leakage protection module is coupled between the current foldback module and the connection node or coupled between the connection node and the first end of anti-interference module.

4 . A connector leakage protection circuit comprising:
a direct current (DC) power supply circuit having an output pin; a current foldback circuit having a first end configured to be coupled to the output pin; an anti-interference circuit having a first end coupled to a second end of the current foldback circuit, and a second end configured to be coupled to a power pin of a connector circuit; and a leakage protection circuit coupled between the output pin and the first end of the current foldback circuit, the second end of the current foldback circuit and the first end of the anti-interference circuit, or the second end of the anti-interference circuit and the power pin; wherein when the output pin outputs a DC voltage, the leakage protection circuit is switched on; and when the output pin does not output the DC voltage, the leakage protection circuit is switched off, thereby preventing current leakage from the power pin flowing to the output pin.

5 . The connector leakage protection circuit of claim 4 , wherein the current foldback circuit is a fuse, a first end of the fuse is coupled to an output pin, and a second end of the fuse is coupled to a forward end of the leakage protection circuit.

6 . The connector leakage protection circuit of claim 5 , wherein the leakage protection circuit is a diode, the positive pole of the diode is coupled to the second end of the fuse; and the negative pole of the diode is coupled to the first end of the anti-interference circuit.

7 . The connector leakage protection circuit of claim 6 , wherein the anti-interference circuit comprises a magnetic bead, a first end of the magnetic bead is coupled to the negative pole of the diode, and a second end of the magnetic bead is coupled to the power pin.

8 . The connector leakage protection circuit of claim 7 , wherein the anti-interference circuit further comprises a zero ohm resistor, and the zero ohm resistor is coupled to the first end and the second end of the magnetic bead in parallel.

9 . The connector leakage protection circuit of claim 4 , further comprising a filtration circuit, wherein a first end of the filtration circuit is coupled to the second end of the current foldback circuit, and a second end of the filtration circuit is grounded.

10 . The connector leakage protection circuit of claim 9 , wherein a connection node is defined between the filtration circuit and the current foldback circuit; the leakage protection circuit is coupled between the current foldback circuit and the connection node or coupled between the connection node and the first end of the anti-interference circuit.

11 . A connector leakage protection circuit comprising:
a direct current (DC) power supply circuit having an output pin; a current foldback circuit having a first end configured to be coupled to the output pin; an anti-interference circuit having a first end coupled to a second end of the current foldback circuit, and a second end configured to be coupled to a power pin of a connector circuit; a filtration circuit having a first end coupled to the second end of the current foldback circuit, and a second end grounded; and a leakage protection circuit coupled between the output pin and the first end of the current foldback circuit, the second end of the current foldback circuit and the first end of the anti-interference circuit, or the second end of the anti-interference circuit and the power pin; wherein when the output pin outputs a DC voltage, the leakage protection circuit is switched on; and when the output pin does not output the DC voltage, the leakage protection circuit is switched off, preventing current leakage from the power pin flowing to the output pin.

12 . The connector leakage protection circuit of claim 11 , wherein the current foldback circuit is a fuse, a first end of the fuse is coupled to an output pin, and a second end of the fuse is coupled to a forward end of the leakage protection circuit.

13 . The connector leakage protection circuit of claim 12 , wherein the leakage protection circuit is a diode, the positive pole of the diode is coupled to the second end of the fuse; and the negative pole of the diode is coupled to the first end of the anti-interference circuit.

14 . The connector leakage protection circuit of claim 13 , wherein the anti-interference circuit comprises a magnetic bead, a first end of the magnetic bead is coupled to the negative pole of the diode, and a second end of the magnetic bead is coupled to the power pin.

15 . The connector leakage protection circuit of claim 14 , wherein the anti-interference circuit further comprises a zero ohm resistor, and the zero ohm resistor is coupled to the first end and the second end of the magnetic bead in parallel.

16 . The connector leakage protection circuit of claim 11 , wherein a connection node is defined between the filtration circuit and the current foldback circuit; the leakage protection circuit is coupled between the current foldback circuit and the connection node or coupled between the connection node and the first end of the anti-interference circuit.

Assignees

• Hong Fu Jin Prec Ind (Wuhan) Co Ltd
• Hon Hai Prec Ind Co Ltd

Inventors

• Chang Gui
• Chen Chun-Sheng

Classifications

• H02H3/18 Primary

  responsive to reversal of direct current · CPC title

• H02H7/20 Primary

  for electronic equipment (for converters H02H7/10; for electric measuring instruments G01R1/36; for DC voltage or current semiconductor regulators G05F1/569; for amplifiers H03F1/52; for electronic switching circuits H03K17/08) · CPC title