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Overcurrent protection device and electronic equipment

An overcurrent protection and current detection circuit technology, applied in the field of circuits, can solve the problems of slow response time of blown fuses and need to be manually replaced, and achieve the effect of realizing load overcurrent protection and short response time

Active Publication Date: 2014-12-03
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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  • Abstract
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Problems solved by technology

It can solve the shortcomings of slow response time and manual replacement of blown fuses in the prior art

Method used

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  • Overcurrent protection device and electronic equipment
  • Overcurrent protection device and electronic equipment

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0014] see figure 1 , is a structural schematic diagram of an overcurrent protection device according to an embodiment of the present invention. The overcurrent protection device includes a current detection circuit 1, a reference current circuit 2, a control circuit 3, a power supply 4 and a load 5. The power supply 4 passes through the current detection circuit 1 It is connected to the control circuit 3, the reference current circuit 2 is connected to the current...

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Abstract

The embodiment of the invention discloses an overcurrent protection device, including a power supply, a current detection circuit, a reference current circuit, a control circuit and a load. The power supply is connected with the control circuit through the current detection circuit, the reference current circuit is connected with the current detection circuit, and the control circuit is connected with the load; the power supply supplies a working voltage to the current detection circuit, the control circuit, the reference current circuit and the load, the reference current circuit generates a reference current, the current detection circuit detects whether a working current of the load exceeds the reference current, if yes, the current detection circuit emits a triggering signal to the control circuit, and the control circuit disconnects the load from the power supply according to the triggering signal. The embodiment of the invention also discloses electronic equipment. By adoption of the overcurrent protection device in the invention, the response time is short, and the degree of automation is high.

Description

technical field [0001] The invention relates to the field of circuits, in particular to an overcurrent protection device and electronic equipment. Background technique [0002] Most electronic equipment has a rated current. When the equipment is working, it must ensure that its working current cannot exceed the rated current. If the working circuit of the equipment exceeds the rated current, it will cause the equipment to burn out. In order to prevent this from happening, the usual practice is to A fuse is installed in the circuit, and the fuse can be blown when the circuit current is overloaded to disconnect the device from the power supply, thereby protecting the device from being burned. At that time, ordinary fuses used the principle of thermal fusing, which had the disadvantages of slow response time and insensitive protection. After the fuse was disconnected, the user had to manually replace a new fuse to ensure the normal operation of the device, which was time-consum...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08
Inventor 周明杰杨小军
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD
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