Protection circuit and protection device
A technology for protecting circuits and circuits, which is applied in the field of circuits, can solve problems such as inadequate circuit protection design and inability to play a protective role, and achieve a good protective effect
Pending Publication Date: 2019-11-12
深圳市强军科技有限公司
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[0004] The main purpose of the present invention is to provide a protection circuit and a protection device, aiming to solve the problem that the existing circuit protection design is not in place and cannot play a good protection role
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[0041] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0042]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 part of the embodiments of the present invention, not all of them. 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.
[0043] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positio...
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The invention provides a protection circuit and a protection device. The protection circuit comprises a sampling circuit, a comparison circuit and a recovery circuit; the sampling circuit is used forcarrying out voltage sampling and current sampling on a power supply, sampling the temperature of the environment where the power supply is located, and sending a sampling value obtained through corresponding sampling to a sampling end of the comparison circuit; the comparison circuit is used for comparing the sampling value obtained by corresponding sampling with a corresponding reference value,and sending an alarm signal to the recovery circuit when any sampling value is greater than a corresponding reference value; the recovery circuit is used for cutting off the power of the power supplywhen receiving the alarm signal sent by the comparison circuit; and the recovery module is also used for recovering the power of the power supply after the recovery time of the alarm signal is not received. By means of the mode, overcurrent, over-temperature and overvoltage protection of the circuit is achieved at the same time, compared with a protection method in the prior art, the protection method is more accurate, the thermal oscillation is not prone to being generated, and a good protection effect is achieved.
Description
technical field [0001] The invention relates to the technical field of circuits, in particular to a protection circuit and a protection device. Background technique [0002] With the increasing complexity and integration of electronic circuits, the requirements for the reliability, stability and safety of electronic circuits are also increasing. Obviously, the protective design of electronic circuits plays an important role in the overall design of circuits. The importance is also becoming more and more prominent. [0003] According to relevant statistics, among the failure causes of electronic products, 75% of electronic product failures are due to insufficient circuit protection, circuit overcurrent, overtemperature and overvoltage, resulting in product damage. However, the existing protection circuit only uses components such as thermistors, varistors and fuses to realize over-temperature, over-voltage and over-current protection of the circuit, which has problems such a...
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IPC IPC(8): H02H3/00H02H3/04
CPCH02H3/00H02H3/04
Inventor 黄业
Owner 深圳市强军科技有限公司