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Universal serial bus (USB) overcurrent protection circuit

An overcurrent protection circuit and connector technology, applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve the problems of being unable to provide overcurrent detection, USB connector overcurrent protection, etc.

Inactive Publication Date: 2013-06-19
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the USB controller is generally integrated inside the south bridge chip of the computer, and some overcurrent detection pins of the USB controller are sometimes used as general purpose input / output (GPIO) pins of the south bridge chip. , but cannot provide the function of over-current detection
Therefore, this will cause some USB connectors of the computer to fail to perform over-current protection.

Method used

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  • Universal serial bus (USB) overcurrent protection circuit

Examples

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Embodiment Construction

[0010] see figure 1 , the USB overcurrent protection circuit 10 of the preferred embodiment of the present invention includes a USB controller 11, a first power supply VCC1, a second power supply VCC2, a resistor R1, a plurality of USB connectors, a plurality of fuses, a plurality of diodes, and a plurality of filters capacitance. Each USB connector is electrically connected to a USB load 20 . The USB controller 11 transmits data to a plurality of USB loads 20 respectively through a plurality of USB connectors. In this embodiment, the USB overcurrent protection circuit 10 includes three USB connectors J1~J3, three fuses F1~F3, three diodes D1~D3, and three filter capacitors C1~C3 as an example to explain the present invention Be explained.

[0011] The USB controller 11 includes an overcurrent detection pin OC. The first power supply VCC1 is electrically connected to the over-current detection pin OC through the resistor R1 , and nodes between the resistor R1 and the over-...

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PUM

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Abstract

The invention provides a universal serial bus (USB) overcurrent protection circuit which comprises a USB controller and multiple USB connectors, wherein each USB connector is electrically connected with a USB load. The USB controllers are composed of overcurrent detection pins, and the multiple USB connector are electrically to the overcurrent detection pins. When the overcurrent detection pins detect that overcurrent of any USB load exists, the USB controllers stop conducting data transmission to multiple USB loads.

Description

technical field [0001] The invention relates to an overcurrent protection circuit, in particular to an overcurrent protection circuit for a USB connector. Background technique [0002] The existing USB controller inside the computer generally has a plurality of over-current detection pins, which are used to respectively detect whether there is an over-current condition on a plurality of USB connectors. When an overcurrent condition occurs on a certain USB connector, the USB control stops data transmission with the USB connector. However, the USB controller is generally integrated inside the south bridge chip of the computer, and some overcurrent detection pins of the USB controller are sometimes used as general purpose input / output (GPIO) pins of the south bridge chip. , and cannot provide the function of over-current detection. Therefore, this will cause some USB connectors of the computer to fail to perform over-current protection. Contents of the invention [0003] I...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087
CPCG06F1/266G06F1/28G06F1/30
Inventor 周海清
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD