CN110932241A - Overload protection method, device and circuit for chip with multiple output channels - Google Patents
Overload protection method, device and circuit for chip with multiple output channels Download PDFInfo
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- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/20—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for electronic equipment
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/42—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to product of voltage and current
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Abstract
The application provides an overload protection method, device and circuit of a chip with multiple output channels, wherein the overload protection method of the chip with the multiple output channels comprises the following steps: acquiring the output power of each output channel of the chip; respectively judging whether the output power of each path of the output channel is greater than the rated power corresponding to each path of the output channel; and closing the output channel with the output power larger than the corresponding rated power. By adopting the scheme provided by the application, when one channel in the multi-channel output channels is overloaded, only the output power of the channel is greater than the corresponding rated power, only the output channel is closed, and because the overloaded output channel is closed, the chip can not generate extra large amount of heat, and the chip can not be heated to be burnt out. Because only one overloaded output channel is shut down in the scheme provided by the application, other output channels can still be in a working state, and the reliability of the chip is higher.
Description
Technical Field
The present application relates to the field of chip technologies, and in particular, to an overload protection method, device, and circuit for a chip having multiple output channels.
Background
With the development of technology, chips are increasingly used in various devices. However, the chip may be overloaded for various reasons during its use, and the temperature of the chip may rise, and the internal structure of the chip may be damaged by the excessive temperature.
In order to avoid burning out of the chip, the following scheme is generally adopted at present: a temperature detection device is added to the chip, the temperature of the chip is detected based on the temperature detection device, and when the temperature of the chip is too high, the power supply of the chip is cut off. The existing detection device for detecting the temperature of the chip mainly senses the surface temperature of the chip by attaching a thermocouple to the surface of the chip.
However, the above solution based on temperature protection chip directly powers off the whole chip when the temperature of the chip rises, which reduces the reliability of the chip.
Disclosure of Invention
The present application aims to provide an overload protection method, apparatus and circuit for a chip with multiple output channels to solve the above problems.
The purpose of the application is realized by the following technical scheme:
based on the first aspect of the present application, the present application provides an overload protection method for a chip with multiple output channels, including:
acquiring the output power of each output channel of the chip;
respectively judging whether the output power of each path of the output channel is greater than the rated power corresponding to each path of the output channel;
and closing the output channel with the output power larger than the corresponding rated power.
Optionally, the obtaining the output power of each output channel of the chip includes:
acquiring output voltage and output current of each output channel of the chip;
and determining the output power of each output channel of the chip based on the output voltage and the output current.
Optionally, the method further includes: and any output channel is opened again after being closed for a preset time.
Optionally, the respectively determining whether the output power of each output channel is greater than the corresponding rated power further includes:
calculating the sum of the output power of each output channel to obtain the total output power of the chip;
calculating the sum of the maximum powers of all paths of output channels in the working state to obtain the maximum power allowed by the chip in the current working state;
judging whether the total output power is greater than the maximum power allowed by the current working state;
and if so, cutting off a power supply circuit of the chip.
Optionally, the method further includes:
acquiring chip self alarm information sent by the chip;
and if the output power of each output channel in the working state does not exceed the corresponding rated power of each output channel, the alarm information is acquired, and the power supply circuit of the chip is cut off.
Optionally, the circuit for cutting off the power supply to the chip includes:
sending a control instruction to a preset switch to control the preset switch to cut off a power supply circuit of the chip;
the preset switch is a switch arranged on a power supply circuit of the chip.
Based on the second aspect of the present application, there is provided an overload protection apparatus for a chip having multiple output channels, comprising:
the acquisition module is used for acquiring the output power of each path of output channel of the chip;
the judging module is used for respectively judging whether the output power of each path of the output channel is greater than the rated power corresponding to each path of the output channel;
and the closing module is used for closing the output channel with the output power larger than the corresponding rated power.
Based on the third aspect of the present application, there is provided an overload protection circuit for a chip having multiple output channels, including: the device comprises a processor, a memory, a chip with multiple output channels and at least two power acquisition modules;
the processor is respectively connected with the memory, the chip and each power acquisition module;
each output channel of the chip is provided with a corresponding power acquisition module;
the power acquisition module is used for acquiring output power of the corresponding output channel and sending the output power to the processor;
the memory is used for storing a computer program;
the processor is configured to call and execute the computer program in the memory to perform the steps of the overload protection method for a chip with multiple output channels according to the first aspect of the present application.
Optionally, the power obtaining module includes: a multiplier and a current sensor;
each current sensor is respectively connected with a corresponding output channel and the multiplier, is used for detecting the output current of the output channel and sends the output current to the multiplier;
the multiplier is connected with the corresponding output channel and used for acquiring the output voltage of the corresponding output channel and determining the output power of the corresponding output channel based on the output current and the output voltage.
Optionally, the power obtaining module includes: a voltage sensor and a current sensor;
the voltage sensor is respectively connected with the corresponding output channel and the processor, acquires the output voltage of the output channel and sends the output voltage to the processor;
the current sensor is respectively connected with the corresponding output channel and the processor, acquires the output current of the output channel and sends the output current to the processor.
Optionally, the current sensor is a hall sensor.
Optionally, the chip power supply circuit further comprises a preset switch arranged on the chip power supply circuit;
the processor is connected with the preset switch through a driving circuit to control the on-off state of the preset switch so as to control whether the power supply circuit of the chip is broken or not.
According to the overload protection method for the chip with the multiple output channels, the output power of each output channel of the chip is obtained firstly; respectively judging whether the output power of each path of the output channel is greater than the rated power corresponding to each path of the output channel; and if so, closing the output channel with the output power larger than the corresponding rated power. In practical scenarios, the temperature of the chip increases mainly due to overload of one output channel in the chip, that is: when the actual output power exceeds the rated power, the temperature of the chip is raised when one of the output channels of the chip is overloaded, and if the scheme in the background technology is adopted, the power supply of the whole chip needs to be cut off when the temperature of the chip rises to a certain degree, so that the whole chip cannot work normally. By adopting the scheme provided by the application, the output power of each output channel of the chip is firstly obtained; respectively judging whether the output power of each path of the output channel is greater than the corresponding rated power; and if so, closing the output channel with the output power larger than the corresponding rated power. At this time, the overloaded output channel is closed, and because the overloaded output channel is closed, the chip does not generate extra large amount of heat, and the chip does not heat up to be burnt out. Because the scheme provided by the application only shuts down the overloaded output channel, and other output channels can still work normally, the reliability of the chip is higher.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic flowchart illustrating an overload protection method for a chip with multiple output channels according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an overload protection circuit of a chip having multiple output channels according to an embodiment of the present disclosure;
fig. 3 is a schematic flowchart of an overload protection method for a chip with multiple output channels according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of an overload protection apparatus for a chip with multiple output channels according to an embodiment of the present disclosure.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
Examples
Fig. 1 is a schematic flowchart illustrating an overload protection method for a chip with multiple output channels according to an embodiment of the present disclosure; referring to fig. 1, the method for protecting an overload of a chip of a multi-channel output provided by the present application includes:
s101, acquiring the output power of each output channel of the chip;
s102, respectively judging whether the output power of each path of output channel is greater than the rated power corresponding to each path of output channel;
in practical applications, the rated powers of the multiple output channels of the chip with multiple output channels may be different powers, and taking a power management chip with multiple output channels as an example, referring to fig. 2, the power management chip in fig. 2 has 3 output channels, and the rated powers of the output channels may be different.
And S103, closing the output channel with the output power larger than the corresponding rated power.
According to the overload protection method for the chip with the multiple output channels, the output power of each output channel of the chip is obtained firstly; respectively judging whether the output power of each path of the output channel is greater than the corresponding rated power; and if so, closing the output channel with the output power larger than the corresponding rated power. In practical scenarios, the temperature of the chip increases mainly due to overload of one output channel in the chip, that is: when the actual output power exceeds the rated power, the temperature of the chip is raised when one of the output channels of the chip is overloaded, and if the scheme in the background technology is adopted, the power supply of the whole chip needs to be cut off when the temperature of the chip rises to a certain degree, so that the whole chip cannot work normally. By adopting the scheme provided by the application, the output power of each output channel of the chip is firstly obtained; respectively judging whether the output power of each path of the output channel is greater than the corresponding rated power; and if so, closing the output channel with the output power larger than the corresponding rated power. At this time, the overloaded output channel is closed, and because the overloaded output channel is closed, the chip does not generate extra large amount of heat, and the chip does not heat up to be burnt out. Because only one overloaded output channel is shut down in the scheme provided by the application, other output channels can still work normally, and the reliability of the chip is higher.
Further, in step S101, there are two main methods for obtaining the output power of each output channel of the chip: one is as follows:
acquiring output voltage and output current of each output channel of the chip;
and determining the output power of each output channel of the chip based on the output voltage and the output current.
In the method, the output power of the output channel is acquired by respectively acquiring the voltage and the current of the output channel, the calculation amount of the hardware structure responsible for executing the step S101 is increased in the manner, but the requirement on an external device is reduced, and a device capable of acquiring the output power of the output channel is provided from the outside in demand, namely a device capable of acquiring the output voltage and the output current of the output channel is provided from the outside.
The other is as follows: and directly acquiring the output power of each output channel provided by an external device.
Specifically, referring to fig. 2, in fig. 2, each output channel of the chip is provided with a corresponding power obtaining module 2; the power acquisition module 2 may include: a multiplier 22 and a current sensor; each current sensor is respectively connected with a corresponding output channel and the multiplier 22, is used for detecting the output current of the output channel, and sends the output current to the multiplier 22; the multiplier 22 is connected to the corresponding output channel, and is configured to obtain an output voltage of the corresponding output channel, and determine an output power of the corresponding output channel based on the output current and the output voltage.
With this arrangement, the output power of each output channel can be directly obtained by the multiplier 22 and an external device such as a current sensor.
Further, in practical applications, when a chip is overloaded and turned off for a period of time because of some reason, the overloaded output channel may be recovered to be normal, and in order to deal with this situation, the scheme provided by the present application further includes, after "turning off the output channel whose output power is greater than the corresponding rated power" in step S103:
and any output channel is opened again after being closed for a preset time.
With the arrangement, the closed output channel can be opened after the preset time, so that the closed output channel can be put into use after being recovered to be normal. Of course, if the output channel that is re-opened is still overloaded and the output power exceeds the corresponding rated power, the relevant steps in steps S101 to S103 are still executed at this time, and the output channel whose output power exceeds the corresponding rated power is closed.
Of course, in practical application, there may be some output channels that are closed by mistake, and these output channels that are closed by mistake can be put into use again through the above scheme.
Further, in the scheme provided in the present application, before the step S102 "respectively determining whether the output power of each output channel is greater than the corresponding rated power" further includes:
calculating the sum of the output power of each output channel to obtain the total output power of the chip;
calculating the sum of the maximum powers of all paths of output channels in the working state to obtain the maximum power allowed by the chip in the current working state;
judging whether the total output power is greater than the maximum power allowed by the current working state;
and if so, cutting off a power supply circuit of the chip.
Through the steps, when the output power of the chip exceeds the maximum power, the power supply circuit of the chip is directly cut off without detailed calculation, and the power supply for the chip is stopped, so that the chip is protected as soon as possible, and the chip is prevented from being damaged.
In practical application, the circuit of the inside non-output channel of chip also can break down, leads to chip temperature to rise or even damage, and this kind of chip inside is provided with detection circuitry under the general condition certainly, alarm unit etc. can send alarm information when the chip breaks down, for better protection chip, includes in the scheme that this application provided:
acquiring chip self alarm information sent by the chip;
and if the output power of each output channel in the working state does not exceed the corresponding rated power of each output channel, the alarm information is acquired, and the power supply circuit of the chip is cut off.
Through the mode, the alarm signal can be generated inside the chip, and each output channel in the working state is normal, the internal fault of the chip is determined, and the whole chip needs to be powered off to wait for further processing.
If the alarm information is acquired and the output power of each output channel in the working state exceeds the respective corresponding rated power, the output channel with the output power exceeding the corresponding rated power should be closed first. And then under the condition that each output channel in the working state can be ensured to be normal, if the alarm information is still obtained at the moment, the power supply circuit of the chip is cut off.
Specifically, referring to fig. 2, the schematic diagram of the overload protection circuit structure of the chip with multiple output channels provided in the present application includes: a preset switch 4 arranged on the chip power supply circuit; the microprocessor 1 is connected with a preset switch 4 through a driving circuit 3;
in practical application, the method for cutting off the power supply circuit of the chip comprises the following steps:
and sending a control instruction to a preset switch 4 to cut off a power supply circuit of the chip. Namely: the microprocessor 1 controls the preset switch 4 to be switched off through the driving circuit 3, so that the power supply circuit of the chip is cut off.
Fig. 3 is a schematic flowchart of an overload protection method for a chip with multiple output channels according to another embodiment of the present disclosure; in order to more clearly describe the scheme provided by the present application, referring to fig. 3 and fig. 2, the overload protection method for a chip having multiple output channels provided by the present application includes:
s301, acquiring the output power of each output channel of the chip;
s302, calculating the sum of the output powers of all the output channels to obtain the total output power of the chip;
s303, calculating the sum of the maximum powers of all paths of output channels in the working state to obtain the maximum power allowed by the chip in the current working state;
it is to be noted that;
specifically, for example: in fig. 2, when there are 3 output channels for the power management chip to normally operate, the maximum power allowed by the current operating state of the power management chip is the sum of the maximum output powers of each of the 3 output channels. When the number of the output channels of the power management chip in normal operation is 2 (specifically, for example, the output channels in normal operation are the first output channel and the second output channel counted from top to bottom), the maximum power allowed by the current operating state of the power management chip at this time is the sum of the maximum output powers of each of the 2 output channels (the first output channel and the second output channel).
S304, judging whether the total output power is greater than the maximum power allowed by the current working state;
and S305, if so, cutting off a power supply circuit of the chip.
It should be noted that: in practical applications, referring to fig. 2, the method for cutting off the power supply circuit of the chip may be: and sending a control instruction to a preset switch 4 to cut off a power supply circuit of the chip. Namely: the microprocessor 1 controls the preset switch 4 to be switched off through the driving circuit 3, so that the power supply circuit of the chip is cut off.
S306, respectively judging whether the output power of each path of output channel is greater than the rated power corresponding to each path of output channel;
it should be noted that, in step S306, the determination is performed for each output channel, and referring to fig. 2, since there are 3 output channels in fig. 2, step S306 needs to perform the determination once for each output channel, that is, perform the determination 3 times.
S307, closing the output channel with the output power larger than the corresponding rated power.
It should be noted that, referring to fig. 2, the microprocessor 1 is connected to the chip through a CAN communication line bus, and thus, in this configuration, the microprocessor 1 may send a control signal to the chip through the CAN communication line bus, and control the chip to close or open each output channel by itself. Generally, a chip with multiple output channels has control commands for opening and closing each output channel, that is: a chip with multiplexed output channels may turn individual output channels on or off by itself.
And S308, any output channel is opened again after being closed for a preset time.
S309, acquiring chip self alarm information sent by the chip;
and S310, if the output power of each output channel in the working state does not exceed the corresponding rated power of each output channel after the alarm information is acquired, cutting off the power supply circuit of the chip.
The steps S301 to S308 and the steps S309 to S310 have no absolute sequence relationship.
By the method, only the output channel with the fault is closed in the using process of the chip with the multi-path output channels, and the normal use of the chip is ensured to the maximum extent.
Fig. 4 is a schematic structural diagram of an overload protection apparatus for a chip with multiple output channels according to an embodiment of the present disclosure; referring to fig. 4, the present application provides an overload protection apparatus for a chip having multiple output channels, including:
an obtaining module 401, configured to obtain output powers of each output channel of the chip;
a judging module 402, configured to respectively judge whether the output power of each output channel is greater than a corresponding rated power;
and a closing module 403, configured to close an output channel with an output power greater than a corresponding rated power.
Fig. 2 is a schematic structural diagram of an overload protection circuit of a chip with multiple output channels according to an embodiment of the present application. Referring to fig. 2, the present application provides an overload protection circuit of a chip having multiple output channels, including: the device comprises a processor, a memory, a chip with multiple output channels and at least two power acquisition modules 2; the microprocessor 1 in fig. 2 includes a processor and a memory. The power management chip in fig. 2 is a chip with multiple output channels.
The processor is respectively connected with the memory, the chip and each power acquisition module 2;
each output channel of the chip is provided with a corresponding power acquisition module 2;
the power acquisition module 2 is used for acquiring output power of the corresponding output channel and sending the output power to the processor;
the memory is used for storing a computer program;
the processor is configured to call and execute the computer program in the memory to perform the steps of the overload protection method for a chip with multiple output channels according to the related embodiment of the present application.
Specifically, the power obtaining module 2 may include: a multiplier 22 and a current sensor;
each current sensor is respectively connected with a corresponding output channel and the multiplier 22, is used for detecting the output current of the output channel, and sends the output current to the multiplier 22;
the multiplier 22 is connected to the corresponding output channel, and is configured to obtain an output voltage of the corresponding output channel, and determine an output power of the corresponding output channel based on the output current and the output voltage.
Specifically, the current sensor is a hall sensor 21.
Compared with the scheme in the background art, the scheme provided by the application replaces the related device which is originally responsible for obtaining the temperature of the chip with the electronic device which can obtain the output power of each output channel of the chip. It should be understood that, the existing scheme for detecting the temperature rise of the chip mainly senses the surface temperature of the chip by attaching the thermocouple to the surface of the chip, and the scheme needs to arrange a plurality of thermocouples for detection, so that the arrangement of the thermocouples for some controllers with better sealing performance is inconvenient; in addition, the temperature rise of the chip is detected by a common infrared technology, and the cost is high. In the present application, the related devices for obtaining the chip temperature are replaced in order to obtain the electronic devices of the output power of each output channel of the chip, and meanwhile, the multiplier 22 and the hall sensor 21 are the existing devices with low price and small volume.
Of course, the power obtaining module 2 may also include: a voltage sensor and a current sensor;
the voltage sensor is respectively connected with the corresponding output channel and the processor, acquires the output voltage of the output channel and sends the output voltage to the processor;
the current sensor is respectively connected with the corresponding output channel and the processor, acquires the output current of the output channel and sends the output current to the processor.
The power acquisition module 2 is responsible for sending output voltage and output current to the processor, and then the processor performs calculation to obtain output power.
In a further aspect provided herein, the method further includes: the preset switch 4 is arranged on the chip power supply circuit;
the processor is connected with the preset switch 4 through the driving circuit 3 to control the on-off state of the preset switch 4 so as to control whether the power supply circuit of the chip is broken or not.
For a specific implementation of the overload protection circuit of the chip with multiple output channels provided in this embodiment of the present application, reference may be made to the implementation of the overload protection method of the chip with multiple output channels described in any of the above embodiments, and details are not described here.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (12)
1. An overload protection method for a chip having multiple output channels, comprising:
acquiring the output power of each output channel of the chip;
respectively judging whether the output power of each path of the output channel is greater than the rated power corresponding to each path of the output channel;
and closing the output channel with the output power larger than the corresponding rated power.
2. The method according to claim 1, wherein the obtaining the output power of each output channel of the chip comprises:
acquiring output voltage and output current of each output channel of the chip;
and determining the output power of each output channel of the chip based on the output voltage and the output current.
3. The overload protection method for a chip having multiple output channels according to claim 1, further comprising: and any output channel is opened again after being closed for a preset time.
4. The overload protection method for a chip with multiple output channels according to claim 1, wherein the determining whether the output power of each output channel is greater than the rated power of the output channel further comprises:
calculating the sum of the output power of each output channel to obtain the total output power of the chip;
calculating the sum of the maximum powers of all paths of output channels in the working state to obtain the maximum power allowed by the chip in the current working state;
judging whether the total output power is greater than the maximum power allowed by the current working state;
and if so, cutting off a power supply circuit of the chip.
5. The overload protection method for a chip having multiple output channels according to claim 1, further comprising:
acquiring chip self alarm information sent by the chip;
and if the output power of each output channel in the working state does not exceed the corresponding rated power of each output channel, the alarm information is acquired, and the power supply circuit of the chip is cut off.
6. The overload protection method for a chip with multiple output channels according to claim 4 or 5, wherein the step of cutting off the power supply circuit of the chip comprises:
sending a control instruction to a preset switch to control the preset switch to cut off a power supply circuit of the chip;
the preset switch is a switch arranged on a power supply circuit of the chip.
7. An overload protection apparatus for a chip having multiplexed output channels, comprising:
the acquisition module is used for acquiring the output power of each path of output channel of the chip;
the judging module is used for respectively judging whether the output power of each path of the output channel is greater than the corresponding rated power;
and the closing module is used for closing the output channel with the output power larger than the corresponding rated power.
8. An overload protection circuit for a chip having multiple output channels, comprising: the device comprises a processor, a memory, a chip with multiple output channels and at least two power acquisition modules;
the processor is respectively connected with the memory, the chip and each power acquisition module;
each output channel of the chip is provided with a corresponding power acquisition module;
the power acquisition module is used for acquiring output power of the corresponding output channel and sending the output power to the processor;
the memory is used for storing a computer program;
the processor is used for calling and executing the computer program in the memory to execute each step in the overload protection method of the chip with the multi-output channel according to any one of claims 1 to 6.
9. The overload protection circuit for a chip having multiple output channels according to claim 8, wherein the power obtaining module comprises: a multiplier and a current sensor;
each current sensor is respectively connected with a corresponding output channel and the multiplier, is used for detecting the output current of the output channel and sends the output current to the multiplier;
the multiplier is connected with the corresponding output channel and used for acquiring the output voltage of the corresponding output channel and determining the output power of the corresponding output channel based on the output current and the output voltage.
10. The overload protection circuit for a chip having multiple output channels according to claim 8, wherein the power obtaining module comprises: a voltage sensor and a current sensor;
the voltage sensor is respectively connected with the corresponding output channel and the processor, acquires the output voltage of the output channel and sends the output voltage to the processor;
the current sensor is respectively connected with the corresponding output channel and the processor, acquires the output current of the output channel and sends the output current to the processor.
11. The overload protection circuit for a chip with multiple output channels according to claim 9 or 10, wherein the current sensor is a hall sensor.
12. The overload protection circuit of a chip with multiple output channels according to any one of claims 8 to 10, further comprising a preset switch arranged on the chip power supply circuit;
the processor is connected with the preset switch through a driving circuit to control the on-off state of the preset switch so as to control whether the power supply circuit of the chip is broken or not.
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