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Protection control circuit, navigation system, communication terminal and control method

A technology of protection control and control circuit, applied in the direction of protection reacting to overcurrent, etc., can solve problems such as burnout of the unit that provides the signal

Pending Publication Date: 2022-04-29
QINGDAO HISENSE MOBILE COMM TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the unit receiving the signal is short-circuited, it will cause the unit providing the signal to burn out

Method used

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  • Protection control circuit, navigation system, communication terminal and control method
  • Protection control circuit, navigation system, communication terminal and control method
  • Protection control circuit, navigation system, communication terminal and control method

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Embodiment Construction

[0020] In order to make the purpose, technical scheme and advantages of the embodiment of the present invention clearer, the technical scheme of the embodiment of the present invention will be clearly and completely described below with reference to the drawings of the embodiment of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. And the embodiments of the invention and the features in the embodiments can be combined with each other without conflict. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative labor are within the scope of the present invention.

[0021]Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the ordinary meanings understood by those with ordinary skills in the field to which the present invention belongs. The words "first", "sec...

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Abstract

The invention discloses a protection control circuit, a navigation system, a communication terminal and a control method, through setting a selection control circuit, when a signal of an enable signal end and a signal of a load connection end are both at a second level, the selection control circuit can output a conduction control signal to control a switch control unit to be conducted, so that the protection control circuit is switched on; therefore, the output end of the to-be-protected unit and the load connecting end are controlled to be conducted, and a signal output by the to-be-protected unit can be input into a load through the load connecting end. When at least one of the signal of the enable signal end and the signal of the load connection end is the first level, the selection control circuit can output a disconnection control signal to control the switch control unit to be disconnected so as to control the output end of the unit to be protected to be disconnected from the load connection end, and therefore the situation that due to load short circuit, the load is damaged can be effectively avoided. And the problem that the output current of the unit to be protected is too large to burn out is solved.

Description

Technical field [0001] The invention relates to the technical field of circuit protection, in particular to a protection control circuit, a navigation system, a communication terminal and a control method. technical background [0002] With the rapid development of science and technology, there are more and more components in communication terminals, among which there are units for providing signals and units for receiving signals. If the unit receiving the signal is short-circuited, the unit providing the signal will burn out. Inventive content [0003] In a first aspect, an embodiment of the present invention provides a protection control circuit, including: [0004] The selection circuit is configured to output a signal through the selection output terminal according to the signal at the load connection terminal and the signal at the enable signal terminal of the unit to be protected; [0005] A switch control unit, configured to connect the selection output terminal, and to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/08
CPCH02H3/08
Inventor 陈香雷王虎高一伦
Owner QINGDAO HISENSE MOBILE COMM TECH CO LTD
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