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Protecting circuit and electronic device with same

一种保护电路、过压保护的技术，应用在紧急保护电路装置、电路装置、自动断开的紧急保护装置等方向，能够解决烧毁等问题，达到降低烧毁的可能性的效果

Active Publication Date: 2012-12-26
CHANGSHU UNIV SCI & TECH PARK CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem in the prior art that electronic equipment is more likely to be burned due to input overvoltage or output overcurrent, an input overvoltage and load overcurrent protection circuit is provided

Method used

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  • Protecting circuit and electronic device with same
  • Protecting circuit and electronic device with same
  • Protecting circuit and electronic device with same

Examples

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Embodiment Construction

[0036] see figure 1 , which is a schematic block diagram of an electronic device in an embodiment of the present invention. The electronic device 10 includes a power circuit 200 , a protection circuit 100 and a load circuit 300 electrically connected in sequence. The power supply circuit 200 is used to provide a power supply signal, and provide the protection circuit 100 and the load circuit 300 with the power required for the operation of each component. The protection circuit 100 is located in the circuit between the power circuit 200 and the load circuit 300 for selectively connecting or disconnecting the electrical connection between the power circuit 200 and the load circuit 300 . The load circuit 300 may be a signal processing circuit, a display driving circuit, a backlight driving circuit, etc. that require an operating voltage of about 5V or 12-36V, and is not limited thereto in other embodiments of the present invention. In this embodiment, it is described that the ...

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PUM

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Abstract

A protection circuit includes a first input, an over-voltage protector, an over-current protector, and a first output connected in series in that order. The first input is configured for receiving a power source. The first output is configured for outputting a voltage of the power source to a load circuit. The over-voltage protector is configured to cut off an electrical connection between the first input and the first output under the condition that a voltage value of the power source is greater than a predetermined voltage value. The over-current protector is configured to cut off an electrical connection between the first input and the first output under the condition that a current value from the first output is greater than a predetermined current value.

Description

technical field [0001] The invention relates to a protection circuit, in particular to a circuit with overvoltage and overcurrent protection functions. Background technique [0002] At present, electronic equipment is widely used in production and daily life, and the electronic equipment usually needs to be provided with a power supply circuit to provide voltage and current signals required for operation. However, when the power supply circuit causes the input voltage or output current to exceed the normal operating voltage of the electronic equipment due to component aging, failure, short circuit or other external reasons, such as lightning strikes or power grids, the circuits in the electronic equipment and the power supply It is more likely that the line will be burned due to overvoltage or overcurrent. Contents of the invention [0003] In order to solve the problem in the prior art that electronic equipment is more likely to be burned due to input overvoltage or outp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/20H02H3/08
CPCH02H3/20H02H3/093
Inventor 王引战
Owner CHANGSHU UNIV SCI & TECH PARK CO LTD
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