Overvoltage protection circuit and method and electronic equipment
An overvoltage protection circuit and circuit connection technology, applied in emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, circuit devices, etc., can solve the problem that the power circuit cannot work normally and affect the power output Problems such as accurate voltage measurement and low power supply voltage to avoid damage to electrical components
Active Publication Date: 2018-06-08
武汉盛帆电子股份有限公司
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Problems solved by technology
[0003] In view of this, the object of the present invention is to provide an overvoltage protection circuit, method and electronic equipment to solve the problem in the prior art that the power consumption circuit cannot work normally due to the action of the overvoltage protection circuit or the problem caused by the action of the overvoltage protection circuit. The problem that causes the output voltage of the power supply to be forcibly pulled down, thereby affecting the accurate measurement of the output voltage of the power supply
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[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is only a part of embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.
[0044] Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the a...
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An overvoltage protection circuit and method and a piece of electronic equipment provided by the invention relate to the technical field of overvoltage protection. The overvoltage protection circuit comprises a first impedance unit, a second impedance unit, a third impedance unit and a switch unit. A first end of the second impedance unit is connected with a second end of the first impedance unit.A first end of the third impedance unit is connected with the first end of the second impedance unit. A first end of the switch unit is connected with a second end of the third impedance unit, and asecond end of the switch unit is connected with a second end of the second impedance unit. When the voltage difference between the two ends of the second impedance unit acquired is greater than a preset value, the switch unit is switched on in order to reduce the voltage difference between the two ends of the second impedance unit through shunting of the third impedance unit and to reduce the voltage value of electrical energy output through the overvoltage protection circuit. Through the method, the problem in the prior art that the electrical circuit cannot work normally or the measurement accuracy of the output voltage of the power supply is affected due to the action of the overvoltage protection circuit can be solved.
Description
technical field [0001] The invention relates to the technical field of overvoltage protection, in particular to an overvoltage protection circuit, method and electronic equipment. Background technique [0002] During the use of the electronic equipment, since the power consumption circuit in the electronic equipment needs to be driven by the power supply to complete the work, the power consumption circuit is generally connected to the power supply. Wherein, when the wiring is wrong or the power supply is faulty, the voltage value of the electric energy output to the power consumption circuit may be greater than the maximum working voltage, thereby causing damage to the electrical components in the power consumption circuit. The inventor found that in the existing overvoltage protection technology, the power consumption circuit cannot work normally due to the action of the overvoltage protection circuit, or the output voltage of the power supply is forcibly pulled down due to...
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Login to view more IPC IPC(8): H02H9/04H02H9/02
CPCH02H9/02H02H9/04
Inventor 李中泽杨飞盘秋荣王伟
Owner 武汉盛帆电子股份有限公司
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