An overcurrent protection device and electronic equipment
A technology of overcurrent protection and current detection circuit, which is applied in the field of circuits, can solve the problems of manual replacement and slow response time of blown fuses, etc., achieve short response time and realize the effect of load overcurrent protection
Active Publication Date: 2017-06-23
SHENZHEN OCEANS KING LIGHTING ENG CO LTD +1
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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
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[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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The embodiment of the present invention discloses an overcurrent protection device, including a power supply, a current detection circuit, a reference current circuit, a control circuit and a load, wherein the power supply is connected to the control circuit through the current detection circuit, and the reference The current circuit is connected to the current detection circuit, and the control circuit is connected to the load; the power supply provides operating voltage for the current detection circuit, control circuit, reference current circuit and load, and the reference current circuit generates a reference current, the current detection circuit detects whether the operating current of the load exceeds the reference current, if yes, the current detection circuit sends a trigger signal to the control circuit, and the control circuit shuts off according to the trigger signal open the connection between the load and the power supply. The embodiment of the invention also discloses an electronic device. By adopting the invention, the reaction 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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IPC IPC(8): H02H3/08
Inventor 周明杰杨小军
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD