CN108966044A - A kind of power-down protection circuit of wireless router, method and wireless router - Google Patents
A kind of power-down protection circuit of wireless router, method and wireless router Download PDFInfo
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- CN108966044A CN108966044A CN201810526045.0A CN201810526045A CN108966044A CN 108966044 A CN108966044 A CN 108966044A CN 201810526045 A CN201810526045 A CN 201810526045A CN 108966044 A CN108966044 A CN 108966044A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q1/00—Details of selecting apparatus or arrangements
- H04Q1/02—Constructional details
- H04Q1/03—Power distribution arrangements
- H04Q1/032—Power distribution arrangements power failure protection
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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
- H02H3/24—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 undervoltage or no-voltage
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Abstract
The present invention relates to wireless router technical fields, disclose a kind of power-down protection circuit of wireless router, method and wireless router, the power-down protection circuit of wireless router includes the first sample circuit, first power adapter, control module and the second sample circuit, first power adapter the output end of the first sample circuit output voltage less than the enable end of the first power adapter enabled voltage when, stop to the first module for power supply, control module is when the voltage detection terminal of control module detects the output voltage of the output end of the second sample circuit less than preset voltage threshold, it executes and the power down protection of NandFlash is acted.Since the power-down protection circuit of the wireless router passes through the first power adapter directly enabled on the first sample circuit hardware; therefore it can stop the power supply to the first module in time; the electric discharge to storage capacitor is reduced to consume; the longer power down protection time can be realized with lesser storage capacitor capacitance, to reduce the cost of wireless router.
Description
Technical field
The present invention relates to wireless router technical field, more particularly to a kind of wireless router power-down protection circuit,
Method and wireless router.
Background technique
The mainboard of wireless router mainly includes CPU, RAM, ROM, exchange chip, radio circuit and USB etc., wherein ROM
For storing program.The ROM of the wireless router of early stage mainly uses Nor Flash, it is contemplated that in course of normal operation, only
The change of small part configuration can be done, the probability for encountering power down is minimum.Therefore, considering cost factor, the wireless routing of early stage
Device not too much power down protection design of attention location system in circuit design.
With the development of wireless router, ROM used by wireless router at this stage is increasingly turned to that capacity is bigger, reads
Writing rate faster Nand Flash, Nand Flash at this time serve not only as program storage, and when wireless router exists
When work, user, which may download the programs such as APP from the Internet at any time and be installed on wireless router, to be run, this means that no route
It is greatly increased by the device probability that CPU reads and writes Nand Flash device in course of normal operation.Write Nand Flash device just like
Lower feature: (1) it when CPU write Nand Flash device, needs first to carry out erasing operation；(2) CPU write Nand Flash device is most
Subsection is a Page.This means that writing includes three steps in a data to Nand Flash: (1) reading to be writtenly
The content of Page where location, and data are arranged in RAM；(2) the Page data are wiped；(3) being put in order in RAM
A Page data write back the Page.Therefore, if fruit product is in the 2nd, the unexpected power down of 3 steps, then it can make Nand Flash device
On program and/or corrupted data, so as to cause wireless router can not work normally, so being set using Nand Flash
The design of power-down protection must be taken into consideration in the wireless router of meter.
Currently, the power-down protection circuit of existing wireless router is mainly supervised using the control module of wireless router
It surveys, it is of short duration when realizing wireless router power down by the storage capacitance of large capacity when monitoring wireless router power down
Power supply, and in Voltage Drop to threshold value, stop the power supply to wireless router.But in implementing process of the present invention, invention
At least there are the following problems in the prior art for people's discovery: the power-down protection circuit of existing wireless router does not account for no route
After device power down, the certain module (such as exchange chip, radio circuit and USB) of wireless router can stop within first time
It only powers, to save electric energy, therefore leads to the storage of the power-down protection circuit needs design more large capacitance of existing wireless router
Energy capacitor increases the quantity of storage capacitor to maintain to power, so as to cause the size of the printed wiring board of existing wireless router
It is larger, and then lead to the higher cost of existing wireless router.
Summary of the invention
The object of the present invention is to provide a kind of power-down protection circuit of wireless router, method and wireless router, energy
When external power supply power down occurs, the certain module of wireless router is powered off in time, to save electric energy, to reduce nothing
The capacitance of the storage capacitor of line router or the quantity of storage capacitor, and then reduce the ruler of the printed wiring board of wireless router
It is very little, to reduce the cost of wireless router.
In order to solve the above technical problem, the present invention provides a kind of power-down protection circuits of wireless router, including first
The power end of sample circuit and the first power adapter, the sampling end and the wireless router of first sample circuit is electrically connected
It connects, the output end of first sample circuit is electrically connected with the enable end of first power adapter；First power supply turns
The input terminal of parallel operation is electrically connected with the power end of the wireless router, and the output end of first power adapter is electrically connected to
The power end of first module of wireless router；
First power adapter, it is defeated when first sample circuit in the wireless router power down
When the output voltage of outlet is less than the enabled voltage of the enable end of first power adapter, stop supplying first module
Electricity；
The power-down protection circuit of the wireless router further includes control module and in parallel with first sample circuit
The second sample circuit, the sampling end of second sample circuit is electrically connected with the power end of the wireless router, described
The output end of two sample circuits is electrically connected with the voltage detection terminal of the control module；The power end of the control module with it is described
The power end of wireless router is electrically connected；
The control module, for detecting the defeated of second sample circuit in the voltage detection terminal of the control module
When the output voltage of outlet is less than preset voltage threshold, the power down protection to Nand Flash in the wireless router is executed
Movement.
Preferably, the power-down protection circuit of the wireless router further includes storage capacitor；
The sampling end of first sample circuit is electrically connected with the power end of the wireless router is specifically: described first
The sampling end of sample circuit is electrically connected with the output end of the storage capacitor, the input terminal of the storage capacitor and the no route
It is connected by the power end of device；
The sampling end of second sample circuit is electrically connected with the power end of the wireless router is specifically: described second
The sampling end of sample circuit is electrically connected with the output end of the storage capacitor, the input terminal of the storage capacitor and the no route
It is electrically connected by the power end of device；
The power end of the control module is electrically connected with the power end of the wireless router: the control module
Power end be electrically connected with the output end of the storage capacitor, the electricity of the input terminal of the storage capacitor and the wireless router
Source electrical connection.
Preferably, the power-down protection circuit of the wireless router further includes second source converter；
The power end of the control module is electrically connected with the output end of the storage capacitor: the second source turns
The input terminal of parallel operation is electrically connected with the output end of the storage capacitor, the enable end of the second source converter and the energy storage
The output end of capacitor is electrically connected, and the output end of the second source converter is electrically connected with the power end of the control module.
Preferably, second sample circuit includes first resistor and second resistance；
The first end of the first resistor is electrically connected with the sampling end of second sample circuit, and the of the first resistor
Two ends are electrically connected with the first end of the second resistance, the second end ground connection of the second resistance；The second of the first resistor
End is electrically connected with the output end of second sample circuit.
Preferably, the first voltage sample circuit includes N number of sub-sampling circuit, first power adapter
Including N number of sub- power adapter, first module includes N number of submodule, N >=1, and the sub-sampling circuit and the son electricity
Source converter and the submodule are one-to-one relationship；
The sampling end of each sub-sampling circuit is electrically connected with the power end of the wireless router, and each son is adopted
The output end of sample circuit is electrically connected with the enable end of the corresponding sub- power adapter；Each sub- power adapter it is defeated
Enter end to be electrically connected with the power end of the wireless router, the output end of each sub- power adapter is electrically connected to corresponding
The power end of the submodule；
The sub- power adapter, the output voltage for the output end in the corresponding sub-sampling circuit are less than described
When the enabled voltage of the enable end of sub- power adapter, stop powering to the corresponding submodule.
Preferably, any submodule be radio-frequency module, USB module, network interface module, bluetooth module and
One of Zigbee module.
Preferably, first module includes at least a radio-frequency module, a USB module, a network interface mould
Block, a bluetooth module and a Zigbee module.
Preferably, the sub-sampling circuit includes 3rd resistor and the 4th resistance；
The first end of the 3rd resistor is electrically connected with the sampling end of the sub-sampling circuit, and the second of the 3rd resistor
End is electrically connected with the first end of the 4th resistance R4, the second end ground connection of the 4th resistance；The of the 3rd resistor R3
Two ends are electrically connected with the output end of the sub-sampling circuit.
In order to solve identical technical problem, the present invention also provides a kind of wireless routers, including the first module, Nand
The power-down protection circuit of Flash, RAM and above-mentioned wireless router；The power end of first module and first electricity
The output end of source converter is electrically connected, and the Nand Flash and the RAM are electrically connected with the control module.
In order to solve identical technical problem, the present invention also provides a kind of power-off protection methods of wireless router, are applicable in
In the power-down protection circuit of above-mentioned wireless router, comprising:
The supply voltage for the wireless router that first sample circuit is obtained according to sampling, is sampled by described first
The output end output voltage of circuit is to the enable end of first power adapter；
First power adapter is less than first electricity in the output voltage of the output end of first sample circuit
When the enabled voltage of the enable end of source converter, stop to first module for power supply；
The supply voltage for the wireless router that second sample circuit is obtained according to sampling, is sampled by described second
The output end output voltage of circuit to the control module voltage detection terminal；
The control module detects the output end of second sample circuit in the voltage detection terminal of the control module
Output voltage when being less than preset voltage threshold, execute and the power down protection of NandFlash acted.
The present invention provides a kind of power-down protection circuit of wireless router, the sampling end and wireless routing of the first sample circuit
The power end of device is electrically connected, and the output end of the first sample circuit is electrically connected with the enable end of the first power adapter；First power supply
The input terminal of converter is electrically connected with the power end of wireless router, and the output end of the first power adapter is electrically connected to no route
By the power end of the first module of device；First power adapter is in wireless router power down, when the output of the first sample circuit
The output voltage at end less than the enable end of the first power adapter enabled voltage when, stop to the first module for power supply；Second adopts
The sampling end of sample circuit is electrically connected with the power end of wireless router, the output end of the second sample circuit and the voltage of control module
Test side electrical connection；The power end of control module is electrically connected with the power end of wireless router；Control module is in control module
When voltage detection terminal detects that the output voltage of the output end of the second sample circuit is less than preset voltage threshold, execute to Nand
The power down protection of Flash acts.In wireless router power down, since the power-down protection circuit of the wireless router passes through first
Directly enabled first power adapter on sample circuit hardware, therefore the power supply to the first module can be stopped in time, to save
Electric energy to reduce the capacitance of the storage capacitor of wireless router or the quantity of storage capacitor, and then reduces wireless router
Printed wiring board size, to reduce the cost of wireless router.Further, since the power down protection electricity of the wireless router
Road is eliminated required for the subsequent power down stage relatively by the first power adapter directly enabled on the first sample circuit hardware
Unit, so that circuit design is simplified, to further reduced the cost of wireless router.
Detailed description of the invention
Fig. 1 is the circuit diagram of the power-down protection circuit of the wireless router in the embodiment of the present invention；
Fig. 2 is the flow chart of the power-off protection method of the wireless router in the embodiment of the present invention.
Wherein, the 1, first sample circuit；11, sub-sampling circuit；2, the first power adapter；21, sub- power adapter；3,
First module；31, submodule；4, control module；5, the second sample circuit；6, storage capacitor；7, second source converter；8,
Nand Flash。
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, a kind of power-down protection circuit of wireless router of the preferred embodiment of the present invention, including the first sampling
Circuit 1 and the first power adapter 2, the power end of the sampling end and the wireless router of first sample circuit 1 are electrically connected
It connects, the output end of first sample circuit 1 is electrically connected with the enable end of first power adapter 2；First power supply
The input terminal of converter 2 is electrically connected with the power end of the wireless router, and the output end of first power adapter 2 is electrically connected
It is connected to the power end of the first module 3 of wireless router；
First power adapter 2 is used in the wireless router power down, when first sample circuit 1
When the output voltage of output end is less than the enabled voltage of the enable end of first power adapter 2, stop to first mould
Block 3 is powered；
The power-down protection circuit of the wireless router further include control module 4 and with first sample circuit 1 simultaneously
Second sample circuit 5 of connection, the sampling end of second sample circuit 5 are electrically connected with the power end of the wireless router, institute
The output end for stating the second sample circuit 5 is electrically connected with the voltage detection terminal of the control module 4；The power supply of the control module 4
End is electrically connected with the power end of the wireless router；
Described 4 pieces of control mould, for detecting second sample circuit 5 in the voltage detection terminal of the control module 4
The output voltage of output end when being less than preset voltage threshold, execute and the power down protection of Nand Flash acted.
In embodiments of the present invention, it executes and the power down protection of Nand Flash is acted, i.e., if it is right at this time
NandFlash write before erasing operation, then immediately stop wipe and former data are write back；If carried out at this time pair
The write operation of NandFlash is then waited and being stopped operation after writing.
In embodiments of the present invention, in wireless router power down, since the power-down protection circuit of the wireless router is logical
It crosses on 1 hardware of the first sample circuit and directly enables first power adapter 2, therefore can stop in time to described
The power supply of one module 3, to save electric energy, to reduce the capacitance or storage capacitor of the storage capacitor of the wireless router
Quantity, and then the size of the printed wiring board of the wireless router is reduced, to reduce the cost of the wireless router.
Further, since the power-down protection circuit of the wireless router on 1 hardware of the first sample circuit by directly making
Energy first power adapter 2, eliminates comparing unit required for the subsequent power down stage, so that circuit design is simple
Change, to further reduced the cost of the wireless router.
In embodiments of the present invention, first power adapter 2 for first module 3 in normal state for supplying
Electricity, the second source converter 7 are used to power for the control module 4.
As shown in Figure 1, in order in the wireless router power down, convenient for being supplied in time the wireless router
Electricity, so that it is guaranteed that the control module 4 can complete ongoing NandFlash write operation, the nothing in the present embodiment
The power-down protection circuit of line router further includes storage capacitor 6；
The sampling end of first sample circuit 1 is electrically connected with the power end of the wireless router is specifically: described
The sampling end of one sample circuit 1 is electrically connected with the output end of the storage capacitor 6, the input terminal of the storage capacitor 6 with it is described
The power end of wireless router is electrically connected；
The sampling end of second sample circuit 5 is electrically connected with the power end of the wireless router is specifically: described
The sampling end of two sample circuits 5 is electrically connected with the output end of the storage capacitor 6, the input terminal of the storage capacitor 6 with it is described
The power end of wireless router connects；
The power end of the control module 4 is electrically connected with the power end of the wireless router is specifically: the control mould
The power end of block 4 is electrically connected with the output end of the storage capacitor 6, the input terminal and the wireless routing of the storage capacitor 6
The power end of device is electrically connected.
As shown in Figure 1, in order to provide suitable supply voltage to the control module 4, it is described wireless in the present embodiment
The power-down protection circuit of router further includes second source converter 7；
The power end of the control module 4 is electrically connected with the output end of the storage capacitor 6: the second source
The input terminal of converter 7 is electrically connected with the output end of the storage capacitor 6, the enable end of the second source converter 7 and institute
State the output end electrical connection of storage capacitor 6, the power end of the output end of the second source converter 7 and the control module 4
Electrical connection.
In embodiments of the present invention, by the way that institute is arranged between the power supply of the wireless router and the control module 4
Second source converter 7 is stated, to turn by the second source converter 7 to the supply voltage of the wireless router
It changes, so that it is guaranteed that the voltage after conversion can meet the supply voltage requirement of the control module 4.
As shown in Figure 1, in order to realize in the wireless router power down, the voltage detection terminal energy of the control module 4
The output voltage of enough output ends for detecting second sample circuit 5 in time is less than preset voltage threshold, in the present embodiment
Second sample circuit 5 include first resistor R1 and second resistance R2；
The first end of the first resistor R1 is electrically connected with the sampling end of second sample circuit 5, the first resistor
The second end of R1 is electrically connected with the first end of the second resistance R2, the second end ground connection of the second resistance R2；Described first
The second end of resistance R1 is electrically connected with the output end of second sample circuit 5.
In embodiments of the present invention, in the wireless router power down, second sample circuit 5 passes through described first
The effect of the partial pressure of resistance R1 and the second resistance R2, the output end of the voltage after partial pressure from second sample circuit 5 is defeated
Out to the voltage detection terminal of the control module 4 so that the voltage detection terminal of the control module 4 can detect in time it is described
The output voltage of the output end of second sample circuit 5 be less than preset voltage threshold, so that it is guaranteed that the control module 4 can and
Shi Zhihang acts the power down protection of the NandFlash.
In addition, in embodiments of the present invention, it should be noted that the ratio of the first resistor R1 and the second resistance R2
The detection voltage threshold being worth with specific reference to the voltage detection terminal of the control module 4 is arranged, and such as works as the electricity of the wireless router
When source voltage is 12V, consider that supply voltage normally fluctuates, it is believed that when supply voltage drops into 10.5V, then the no route
By device power down, if the detection voltage threshold of the voltage detection terminal of the control module 4 is 1.25V, at this time described first
The ratio of the resistance R1 and second resistance R2 is 7.4.
As shown in Figure 1, in order to ensure in the wireless router power down, the power-down protection circuit of the wireless router
It can stop the power supply to multiple modules of the wireless router, the first voltage sample circuit in the present embodiment in time
1 includes N number of sub-sampling circuit 11, and first power adapter 2 includes N number of sub- power adapter 21, and first module 3 is wrapped
It includes N number of submodule 31, N >=1, and the sub-sampling circuit 11 and the sub- power adapter 21 and the submodule 31 is one by one
Corresponding relationship；
The sampling end of each sub-sampling circuit 11 is electrically connected with the power end of the wireless router, each son
The output end of sample circuit 11 is electrically connected with the enable end of the corresponding sub- power adapter 21；Each sub- power supply conversion
The input terminal of device 21 is electrically connected with the power end of the wireless router, and the output end of each sub- power adapter 21 is electrically connected
It is connected to the power end of the corresponding submodule 31；
The sub- power adapter 21, the output voltage for the output end in the corresponding sub-sampling circuit 11 are less than
When the enabled voltage of the enable end of the sub- power adapter 21, stop powering to the corresponding submodule 31.
In embodiments of the present invention, due to the sub-sampling circuit 11 and the sub- power adapter 21 and the submodule
31 are one-to-one relationship, and ensure that in the wireless router power down, each described 11 He of sub-sampling circuit
Each described sub- power adapter 21 can be individually used for stopping the power supply of the corresponding submodule 31, to guarantee and
When stop power supply to multiple modules of the wireless router.
In embodiments of the present invention, the type of the submodule 31 can be wanted according to the actual use of the wireless router
Ask setting, it is preferable that any submodule 31 in the present embodiment is radio-frequency module, USB module, network interface module, bluetooth mould
One of block and Zigbee module.
Further, in this embodiment first module 3 include at least a radio-frequency module, USB module, one
A network interface module, a bluetooth module and a Zigbee module.
As shown in Figure 1, the sub- power adapter 21 can be examined in time in order to ensure in the wireless router power down
The output voltage for measuring the output end of the corresponding sub-sampling circuit 11 is less than the enable end of the sub- power adapter 21
Voltage is enabled, the sub-sampling circuit 11 in the present embodiment includes 3rd resistor R3 and the 4th resistance R4；
The first end of the 3rd resistor R3 is electrically connected with the sampling end of the sub-sampling circuit 11, the 3rd resistor R3
Second end be electrically connected with the first end of the 4th resistance R4, the second end of the 4th resistance R4 ground connection；The third electricity
The second end of resistance R3 is electrically connected with the output end of the sub-sampling circuit 11.
In embodiments of the present invention, in the wireless router power down, the sub-sampling circuit 11 passes through the third
The effect of the partial pressure of resistance R3 and the 4th resistance R4 exports the voltage after partial pressure from the output end of the sub-sampling circuit 11
To the enable end of the corresponding sub- power adapter 21, so that the corresponding sub- power adapter 21 can detect institute in time
State the output end of sub-sampling circuit 11 output voltage be less than the corresponding sub- power adapter 21 enable end enabled electricity
Pressure, so that it is guaranteed that the corresponding sub- power adapter 21 stops the power supply to the corresponding submodule 31.
In addition, in embodiments of the present invention, it should be noted that the ratio of the 3rd resistor R3 and the 4th resistance R4
Value can be selected according to the type of the submodule 31, such as when the supply voltage of the wireless router is 12V, be considered
Supply voltage normally fluctuates, it is believed that when supply voltage drops into 10.5V, then wireless router power down, if institute
Stating submodule 31 is radio-frequency module, and the enabled voltage of the corresponding sub- power adapter 21 is 1.6V, at this time the third
The ratio of resistance R3 and the 4th resistance R4 is 5.56；For another example when the submodule 31 is USB module or network interface module,
The enabled voltage of the corresponding sub- power adapter 21 is 2V, and the 3rd resistor and the ratio of the 4th resistance are at this time
4.25。
In order to solve identical technical problem, the present invention also provides a kind of wireless routers, including the first module 3, Nand
The power-down protection circuit of Flash8, RAM and above-mentioned wireless router；The power end of first module 3 and described first
The output end of power adapter 2 is electrically connected, and the Nand Flash and the RAM are electrically connected with the control module 4.
In order to solve identical technical problem, the present invention also provides a kind of power-off protection methods of wireless router, are applicable in
In the power-down protection circuit of above-mentioned wireless router.As shown in Fig. 2, it is a kind of falling for wireless router provided by the invention
The flow chart of the embodiment of electric protection method, comprising:
S11, the supply voltage for the wireless router that first sample circuit is obtained according to sampling, by described first
The output end output voltage of sample circuit is to the enable end of first power adapter；
S12, first power adapter is in wireless router power down, when the output end of first sample circuit
When output voltage is less than the enabled voltage of the enable end of first power adapter, stop to first module for power supply；
S13, the supply voltage for the wireless router that second sample circuit is obtained according to sampling, by described second
The output end output voltage of sample circuit to the control module voltage detection terminal；
S14, the control module detect the defeated of second sample circuit in the voltage detection terminal of the control module
When the output voltage of outlet is less than preset voltage threshold, executes and the power down protection of Nand Flash is acted.
In embodiments of the present invention, in wireless router power down, the power-off protection method of the wireless router passes through
First power adapter 2 is directly enabled on first sample circuit, 1 hardware, to stop in time to first module 3
Power supply, save electric energy, to reduce the capacitance of the storage capacitor of the wireless router or the quantity of storage capacitor, in turn
The size of the printed wiring board of the wireless router is reduced, to reduce the cost of the wireless router.
To sum up, the present invention provides power-down protection circuit, method and the wireless router of a kind of wireless router, wireless routing
The power-down protection circuit of device includes the first sample circuit 1, the second sample circuit 5, the first power adapter 2 and control module 4, the
The sampling end of one sample circuit 1 is electrically connected with the power end of wireless router, the output end and the first power supply of the first sample circuit 1
The enable end of converter 2 is electrically connected；The input terminal of first power adapter 2 is electrically connected with the power end of wireless router, and first
The output end of power adapter 2 is electrically connected to the power end of the first module 3 of wireless router；First power adapter 2 is in nothing
When line router power down, when first sample circuit 1 output end output voltage less than the first power adapter enable end
When enabled voltage, stop powering to the first module 3；The sampling end of second sample circuit 5 and the power end of wireless router are electrically connected
It connects, the output end of the second sample circuit 5 is electrically connected with the voltage detection terminal of control module 4；The power end of control module 4 and wireless
The power end of router is electrically connected；Control module 4 detects the defeated of the second sample circuit 5 in the voltage detection terminal of control module 4
When the output voltage of outlet is less than preset voltage threshold, executes and the power down protection of NandFlash is acted.Since this is without route
By the power-down protection circuit of device by the first power adapter 2 directly enabled on 1 hardware of the first sample circuit, therefore can be timely
Stop the power supply to the first module 3, to save electric energy, to reduce the capacitance or energy storage electricity of the storage capacitor of wireless router
The quantity of appearance, and then the size of the printed wiring board of wireless router is reduced, to reduce the cost of wireless router.In addition,
Since the power-down protection circuit of the wireless router is by directly enabling the first power adapter 2 on 1 hardware of the first sample circuit,
Comparing unit required for the subsequent power down stage is eliminated, so that circuit design is simplified, to further reduced nothing
The cost of line router.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and replacement can also be made, these are improved and replacement
Also it should be regarded as protection scope of the present invention.
Claims (10)
1. a kind of power-down protection circuit of wireless router, which is characterized in that converted including the first sample circuit and the first power supply
The sampling end of device, first sample circuit is electrically connected with the power end of the wireless router, first sample circuit
Output end is electrically connected with the enable end of first power adapter；The input terminal of first power adapter and described wireless
The power end of router is electrically connected, and the output end of first power adapter is electrically connected to the first module of wireless router
Power end；
First power adapter is used in the wireless router power down, when the output end of first sample circuit
Output voltage be less than first power adapter enable end enabled voltage when, stop to first module for power supply；
The power-down protection circuit of the wireless router further includes control module and in parallel with first sample circuit
The sampling end of two sample circuits, second sample circuit is electrically connected with the power end of the wireless router, and described second adopts
The output end of sample circuit is electrically connected with the voltage detection terminal of the control module；The power end of the control module and described wireless
The power end of router is electrically connected；
The control module, for detecting the output end of second sample circuit in the voltage detection terminal of the control module
Output voltage when being less than preset voltage threshold, execute and the power down protection of Nand Flash acted.
2. the power-down protection circuit of wireless router as described in claim 1, which is characterized in that the wireless router falls
Electric protection circuit further includes storage capacitor；
The sampling end of first sample circuit is electrically connected with the power end of the wireless router is specifically: first sampling
The sampling end of circuit is electrically connected with the output end of the storage capacitor, the input terminal of the storage capacitor and the wireless router
Power end electrical connection；
The sampling end of second sample circuit is electrically connected with the power end of the wireless router is specifically: second sampling
The sampling end of circuit is electrically connected with the output end of the storage capacitor, the input terminal of the storage capacitor and the wireless router
Power end connection；
The power end of the control module is electrically connected with the power end of the wireless router: the electricity of the control module
Source is electrically connected with the output end of the storage capacitor, the power end of the input terminal of the storage capacitor and the wireless router
Electrical connection.
3. the power-down protection circuit of wireless router as claimed in claim 2, which is characterized in that the wireless router falls
Electric protection circuit further includes second source converter；
The power end of the control module is electrically connected with the output end of the storage capacitor: the second source converter
Input terminal be electrically connected with the output end of the storage capacitor, the enable end of the second source converter and the storage capacitor
Output end electrical connection, the output end of the second source converter is electrically connected with the power end of the control module.
4. the power-down protection circuit of wireless router as described in claim 1, which is characterized in that the second sample circuit packet
Include first resistor and second resistance；
The first end of the first resistor is electrically connected with the sampling end of second sample circuit, the second end of the first resistor
It is electrically connected with the first end of the second resistance, the second end ground connection of the second resistance；The second end of the first resistor with
The output end of second sample circuit is electrically connected.
5. the power-down protection circuit of wireless router according to any one of claims 1-4, which is characterized in that described first
Voltage sampling circuit includes N number of sub-sampling circuit, and first power adapter includes N number of sub- power adapter, and described first
Module includes N number of submodule, N >=1, and the sub-sampling circuit and the sub- power adapter and the submodule is one a pair of
The relationship answered；
The sampling end of each sub-sampling circuit is electrically connected with the power end of the wireless router, each sub-sampling electricity
The output end on road is electrically connected with the enable end of the corresponding sub- power adapter；The input terminal of each sub- power adapter
It is electrically connected with the power end of the wireless router, the output end of each sub- power adapter is electrically connected to corresponding described
The power end of submodule；
The sub- power adapter, the output voltage for the output end in the corresponding sub-sampling circuit are less than the son electricity
When the enabled voltage of the enable end of source converter, stop powering to the corresponding submodule.
6. the power-down protection circuit of wireless router as claimed in claim 5, which is characterized in that any submodule is to penetrate
One of frequency module, USB module, network interface module, bluetooth module and Zigbee module.
7. the power-down protection circuit of wireless router as claimed in claim 6, which is characterized in that first module is at least wrapped
Include a radio-frequency module, a USB module, a network interface module, a bluetooth module and a Zigbee module.
8. the power-down protection circuit of wireless router as claimed in claim 5, which is characterized in that the sub-sampling circuit includes
3rd resistor and the 4th resistance；
The first end of the 3rd resistor is electrically connected with the sampling end of the sub-sampling circuit, the second end of the 3rd resistor with
The first end of 4th resistance is electrically connected, the second end ground connection of the 4th resistance；The second end of the 3rd resistor and institute
State the output end electrical connection of sub-sampling circuit.
9. a kind of wireless router, which is characterized in that including the first module, Nand Flash, RAM and such as claim 1-8
The power-down protection circuit of described in any item wireless routers；The power end of first module and first power adapter
Output end electrical connection, the Nand Flash and the RAM are electrically connected with the control module.
10. a kind of power-off protection method of wireless router, which is characterized in that be suitable for as described in claim any one of 1-8
Wireless router power-down protection circuit, comprising:
The supply voltage for the wireless router that first sample circuit is obtained according to sampling, by first sample circuit
Output end output voltage to the enable end of first power adapter；
First power adapter turns in the output voltage of the output end of first sample circuit less than first power supply
When the enabled voltage of the enable end of parallel operation, stop to first module for power supply；
The supply voltage for the wireless router that second sample circuit is obtained according to sampling, by second sample circuit
Output end output voltage to the control module voltage detection terminal；
The control module detects the defeated of the output end of second sample circuit in the voltage detection terminal of the control module
When voltage is less than preset voltage threshold out, executes and the power down protection of NandFlash is acted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810526045.0A CN108966044B (en) | 2018-05-28 | 2018-05-28 | Power failure protection circuit and method of wireless router and wireless router |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810526045.0A CN108966044B (en) | 2018-05-28 | 2018-05-28 | Power failure protection circuit and method of wireless router and wireless router |
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| CN108966044A true CN108966044A (en) | 2018-12-07 |
| CN108966044B CN108966044B (en) | 2021-02-09 |
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| CN108966044B (en) | 2021-02-09 |
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