Chip protection circuit and system
A technology for protection circuits and temperature protection circuits, which is applied in emergency protection circuit devices, circuit devices, emergency protection devices with automatic disconnection, etc., can solve problems such as chip fire or natural problems, improve safety and reduce abnormal heating the effect of the possibility
Active Publication Date: 2017-09-15
NANJING ZGMICRO CO LTD
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[0004] The embodiment of this application proposes a chip protection circuit and system to solve the technical problems in the prior art that when the chip is damaged, the chip is wrongly connected or used incorrectly, there will be dangers such as fire or nature.
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[0016] In order to make the technical solutions and advantages of the present application clearer, the exemplary embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all implementations. Exhaustive list of examples. And in the case of no conflict, the embodiments in this description and the features in the embodiments can be combined with each other.
[0017] Aiming at the deficiencies of the prior art, an embodiment of the present application proposes a chip protection circuit and system, which will be described below.
[0018] figure 1 shows the schematic structure of the chip protection circuit in the embodiment of the application Figure 1 , as shown in the figure, the chip protection circuit may include: a temperature protection circuit, a first current module, a second current module, a current ...
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The invention provides a chip protection circuit and system. The chip protection circuit comprises a temperature protection circuit, a first current module, a second current module, a current sampling circuit, a comparator, a logic device and a switching device; when the temperature protection circuit detects that the chip temperature is greater than a preset temperature threshold value, a control signal is output to switch off the first current module; the working current of the first current module is higher than that of the second current module; the current sampling circuit samples the current which flows through a chip power line; the comparator outputs an effective signal when the current of the chip power line is greater than a preset reference current; and when the control signal output by the temperature protection circuit is the signal for switching off the first current module and when the signal output by the comparator is the effective signal, the logical device controls the switching device to be switched on, so as to burn out the fuse positioned between the chip and the chip protection circuit. By virtue of the chip protection circuit and system, the safety of an electronic system can be improved.
Description
technical field [0001] This application relates to the technical field of power batteries, in particular to chip protection circuits and systems. Background technique [0002] In the prior art, the chip can generally perform normal functions when it works normally. [0003] However, when the chip is damaged, wrongly connected or misused (for example, short-circuit connection), the chip may be out of control, which may cause the chip to generate abnormal heat, and eventually lead to fire, spontaneous combustion and other dangers. Contents of the invention [0004] The embodiment of the present application proposes a chip protection circuit and system to solve the technical problems in the prior art that when the chip is damaged, the chip is wrongly connected or misused, there will be dangers such as fire or nature. [0005] The embodiment of the present application provides a chip protection circuit, including: a temperature protection circuit, a first current module, a se...
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IPC IPC(8): H02H7/20H02H5/04
CPCH02H5/04H02H7/20
Inventor 王钊杨晓东
Owner NANJING ZGMICRO CO LTD