An over-temperature protection device and electronic equipment
A technology of over-temperature protection and temperature detection circuit, which is applied in the field of circuits, can solve the problems of slow response time of blown fuses and the need for manual replacement, and achieve the effects of short response time and load over-temperature protection
Active Publication Date: 2017-10-13
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 over-temperature protection device according to an embodiment of the present invention, the over-temperature protection device includes a temperature detection circuit 1, a reference voltage circuit 2, a control circuit 3, a power source 4 and a load 5, and the power source 4 passes through the temperature detection circuit 1 It is connected to the control circuit 3, the reference voltage circuit 2 is co...
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The embodiment of the present invention discloses an over-temperature protection device, including a power supply, a temperature detection circuit, a reference voltage circuit, a control circuit and a load, wherein the power supply is connected to the control circuit through the temperature detection circuit, and the reference The voltage circuit is connected to the temperature detection circuit, and the control circuit is connected to the load; the power supply provides working voltage for the temperature detection circuit, control circuit, reference voltage circuit and load, and the reference voltage circuit generates a reference Voltage, the temperature detection circuit detects whether the operating current of the load exceeds the reference voltage, if yes, the temperature 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 over-temperature protection device and electronic equipment. Background technique [0002] Most electronic equipment has a rated operating temperature. When the equipment is working, it must be ensured that it works within the normal temperature range. If the operating temperature of the equipment is too high, it will cause the equipment to burn. In order to prevent this from happening, the usual practice It is to install a fuse in the circuit. The fuse can be blown when the circuit is overheated 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-consuming and la...
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IPC IPC(8): H02H5/04
Inventor 周明杰杨小军
Owner SHENZHEN OCEANS KING LIGHTING ENG CO LTD