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Short-circuit protection circuit and short-circuit protection method

A short-circuit protection circuit and protection device technology, applied in the field of communication, can solve the problems of difficulty in determining the resistance values ​​of R1 and R2, and achieve the effect of saving resistance devices and easy short-circuit protection

Active Publication Date: 2011-03-16
ZTE CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in practical applications, it is difficult to determine the resistance of R1 and R2 under the condition of considering the load, which requires complex calculations and repeated debugging.

Method used

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  • Short-circuit protection circuit and short-circuit protection method

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Embodiment Construction

[0018] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0019] figure 2 is a schematic structural diagram of a short circuit protection circuit according to an embodiment of the present invention. Such as figure 2 As shown, the short circuit protection circuit according to the embodiment of the present invention includes: a protection device 2 and a detection device 4 .

[0020] A detection device 4, one end of which is connected to the output end of the power supply, and the other end is connected to the first end of the protection device, and is used to perform a cut-off operation when it is detected that the voltage at the output end of the power supply is lower than a predetermined threshold;

[0021] The protection device 2, the second end of wh...

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Abstract

The invention discloses a short-circuit protection circuit and a short-circuit protection method. The circuit of the invention comprises a detection device and a protection device, wherein one end of the detection device is connected with a power output end, and the other end of the detection device is connected with a first end of the protection device; the detection device is used for carrying out cutting operation under the condition of detecting the fact that the voltage of the power output end is lower than a set threshold; a second end of the protection device is connected with a power input end; a third end of the protection device is connected with the power output end; and the protection device is used for carrying out the cutting operation to cut off the power output at the time of acquiring indication information which is cut by the detection device. According to the technical scheme provided the invention, short-circuit protection of a low-voltage direct current circuit can easily realized under the condition of saving resistance devices.

Description

technical field [0001] The present invention relates to the field of communication. More specifically, the present invention relates to a short circuit protection circuit and a short circuit protection method. Background technique [0002] At present, there are many specific implementation methods for the short-circuit protection circuit of the low-voltage direct current circuit, and the short-circuit protection circuits adopted are different for different application occasions. The short-circuit protection circuit is generally based on two detection principles: one is to detect a large current during a short circuit; the other is to detect a voltage during a short circuit. [0003] In related technologies, the simplest short-circuit protection circuit based on voltage detection is as figure 1 as shown, figure 1 The terminal 11 shown is the power input terminal, the terminal 15 is the power output terminal, and the terminal 10 is the protection circuit. Under normal circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/26
Inventor 黄毅
Owner ZTE CORP
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