CN106058975A - Protection circuit, method and mobile terminal - Google Patents
Protection circuit, method and mobile terminal Download PDFInfo
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- CN106058975A CN106058975A CN201610430926.3A CN201610430926A CN106058975A CN 106058975 A CN106058975 A CN 106058975A CN 201610430926 A CN201610430926 A CN 201610430926A CN 106058975 A CN106058975 A CN 106058975A
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- voltage
- fpdp
- circuit
- mobile terminal
- state
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
Abstract
The embodiment of the invention provides a protection circuit, a method and a mobile terminal. The protection circuit comprises a processing module and a protection module, wherein the processing module is used for obtaining first voltage of the protection module, monitoring whether the mobile terminal is in an uncharged state or not according to the first voltage, transmitting a first signal to the protection module when monitoring that the mobile terminal is in the uncharged state, monitoring whether a data port of the mobile terminal is in a corrosion state or not according to the first voltage and first preset voltage and transmitting a second signal to the protection module when monitoring that the data port is in the corrosion state; and the protection module is used for outputting the first preset voltage to the data port when receiving the first signal and switching into a low-voltage charging mode from a high-voltage charging mode when receiving the second signal. The charging mode is switched into the low-voltage charging mode from the high-voltage charging mode when the condition that the data port is corroded is monitored, so that the corrosion rate of the data port is reduced.
Description
Technical field
The present invention relates to guard technology field, particularly relate to a kind of protection circuit, method and mobile terminal.
Background technology
Along with the development of mobile terminal rapid nitriding, and the demand that user is to quick charge, on market more
Carrying out the most mobile terminals utilizes high-voltage high-speed charging modes to replace tradition charging modes, wherein, the charging of tradition charging modes
Device specification, such as 5V/2A, and the charger specification of common high-voltage high-speed charging modes, such as 9V/2A, 12V/2A.
Prior art is by the level of charger monitoring mobile terminal USB port data signal D+/D-, when data signal D
The level of +/D-reaches threshold value, and charger actively turns off charging process.Owing to, in identical wet environment, charging compared to tradition
Mode, utilizes high-voltage high-speed charging modes to be charged mobile phone, after mobile terminal USB port enters liquid, and the wind being corroded
Danger is bigger；Therefore, when being in etch state when USB port, due to high-voltage charging, USB port is by fast erosion, when shorter
In, charger is able to detect that USB port is corroded, and turns off charging process so that the event that can not charge occurs in mobile terminal
Barrier.
Summary of the invention
The embodiment of the present invention provides a kind of protection circuit, method and mobile terminal, in order to solve in prior art in corrosion
When material enters mobile terminal USB port, compared to utilizing low pressure to be charged, high-voltage charging can accelerate the corrosion of USB port
Speed, thus trigger the protection mechanism of charger, turn off charging process so that mobile terminal occurs can not charge fault.
In order to solve the problems referred to above, the embodiment of the present invention provides a kind of protection circuit, including: processing module and protection mould
Block, wherein, described processing module includes that obtaining submodule, monitoring submodule and signal sends submodule, wherein, described acquisition
Module, for obtaining the first voltage of described protection module；Described monitoring submodule, for according to described first voltage, monitoring
Whether mobile terminal is in non-charged state；And according to described first voltage and the first predeterminated voltage, monitor described mobile whole
Whether the FPDP of end is in etch state；Described signal sends submodule, for monitoring institute when described monitoring submodule
State mobile terminal when being in non-charged state, send the first signal to described protection module；When described monitoring submodule monitors
When described FPDP is in etch state, send secondary signal to described protection module；Described protection module, for when receiving
During to described first signal, export described first predeterminated voltage to described FPDP；When receiving described secondary signal, from
High-voltage charging pattern switches to low pressure charge mode.
Accordingly, the embodiment of the present invention additionally provides a kind of mobile terminal, employs above protection circuit.
Accordingly, the embodiment of the present invention, on the basis of above-mentioned protection circuit, additionally provides a kind of means of defence, obtains institute
State the first voltage of protection module；According to described first voltage, monitor whether described mobile terminal is in non-charged state；Work as prison
Measure described mobile terminal when being in non-charged state, send the first signal to described protection module, so that described protection module
FPDP to described mobile terminal exports the first predeterminated voltage；According to described first voltage and the first predeterminated voltage, monitoring
Whether described FPDP is in etch state；When monitoring etch state at described FPDP, to described protection module
Send secondary signal, so that described protection module switches to low pressure charge mode from high-voltage charging pattern.
So, whether the embodiment of the present invention, when charger removes, is in corrosion by monitoring data of mobile terminal port
State；When monitoring FPDP and being in etch state, the charge mode of charging circuit is switched to by high-voltage charging pattern
Low pressure charge mode；To slow down the speed that FPDP is corroded, reduce mobile terminal and the probability of charge fault occurs.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of protection circuit of the embodiment of the present invention；
Fig. 2 is the structural representation of the another kind of protection circuit of the embodiment of the present invention；
Fig. 3 is the structural representation of a kind of protection module of the embodiment of the present invention；
Fig. 4 is the schematic equivalent circuit of a kind of FPDP, bleeder circuit and the protection circuit of the embodiment of the present invention；
Fig. 5 is the structural representation of the another kind of protection circuit of the embodiment of the present invention；
Fig. 6 is the flow chart of steps of a kind of means of defence of the embodiment of the present invention；
Fig. 7 is the flow chart of steps of the another kind of means of defence of the embodiment of the present invention.
Detailed description of the invention
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing.
Embodiment one
With reference to Fig. 1, it is shown that the structural representation of a kind of protection circuit of the present invention, described protection circuit 10 includes: place
Reason module 11, protection module 12 and FPDP 13；Wherein, described processing module 11 includes obtaining submodule 110, monitoring modular
111 and signal transmitting module 112.
Described acquisition submodule 110, for obtaining the first voltage of described protection module 12.
Described monitoring submodule 111, for according to described first voltage, whether monitoring mobile terminal is in non-charging shape
State；According to described first voltage and the first predeterminated voltage, whether the FPDP 13 monitoring described mobile terminal is in corrosion shape
State.
Described signal sends submodule 112, for when monitoring described mobile terminal 10 and being in non-charged state, to institute
State protection module 12 and send the first signal；When monitoring described FPDP 13 and being in etch state, to described protection module
12 send secondary signal.
Described protection module 12, for when receiving described first signal, to described data terminal 13 mouthfuls output described the
One predeterminated voltage；When receiving described secondary signal, switch to low pressure charge mode from high-voltage charging pattern.
After corrosive deposit enters the FPDP of mobile terminal, FPDP is caused to be corroded, compared to traditional low pressure
Charging modes, utilizes high-voltage high-speed charging modes to be charged mobile phone, and FPDP is easier to be corroded；Therefore, the present invention
Mobile terminal, when detecting that FPDP is in etch state, is switched to low pressure charging mould from high-voltage charging pattern by embodiment
Formula, to slow down the speed that FPDP is corroded.
The embodiment of the present invention is after pulling out charger, when mobile terminal is in non-charged state, by mobile terminal monitored
Whether being corroded of FPDP 13, when described FPDP 13 degree of being corroded reaches pre-conditioned, determines described data
Port 13 is in etch state.Therefore, by described processing module 11, the embodiment of the present invention can monitor whether mobile terminal is located
In non-charged state, and monitor whether described FPDP 13 is in etch state；It is in described when monitoring mobile terminal
Non-charged state, or, monitor FPDP 13 when being in etch state, send the signal of correspondence to protection module 12；Protection
Module 12, according to the signal received, performs corresponding operation.Concrete, obtain submodule 110, obtain described protection module 12
First voltage；Monitoring submodule 111, described first voltage obtained according to described acquisition submodule 110, it is judged that whether charger
It is removed, i.e. monitors whether described mobile terminal is in non-charged state；When determining that described mobile terminal is in non-charged state
Time, signal sends submodule 112 and sends the first signal to described protection module 12；Described protection module 12, according to the institute received
State the first signal, export the first predeterminated voltage to described FPDP 13, so that the first pin of described FPDP is high electricity
Flat；Wherein, described first predeterminated voltage could be arranged to voltage when charging less than mobile terminal, and more than 0V；Such as 3.3V；Institute
Stating protection module 12, after described FPDP 13 exports the first predeterminated voltage, described monitoring submodule 111, further according to institute
State the first voltage and the first predeterminated voltage, monitor whether described FPDP 13 is in etch state；When determining described data terminal
When mouth 13 is in etch state, described signal transmitting module 112, send secondary signal to described protection module 12；Described protection
Module 12, according to the secondary signal received, switches to low pressure charge mode from high-voltage charging pattern so that plugging charger
When being charged to described mobile terminal, low pressure charge mode is utilized to be charged, to slow down what described FPDP was corroded
Speed.
The embodiment of the present invention is when charger removes, and is monitored the corrosion of FPDP by the protection circuit of mobile terminal
State；Concrete, the first voltage of described protection module is obtained by obtaining submodule；Monitoring submodule is according to described first electricity
Pressure, whether monitoring mobile terminal is in non-charged state, when monitoring mobile terminal and being in non-charged state, to protection module
Send the first signal；Described protection module, according to the first signal received, exports the first predetermined level to described FPDP；Institute
State monitoring submodule, further according to the first voltage and described first predeterminated voltage, monitor whether described FPDP is in corrosion shape
State；When detecting that FPDP is in etch state, to described protection module send secondary signal, described protection module according to
The secondary signal received, is switched to low pressure charge mode by charge mode by high-voltage charging pattern so that when plugging charger,
Mobile terminal is charged by low pressure charge mode, to slow down the speed that FPDP is corroded, reduces mobile terminal and occurs
The probability of charge fault.
Embodiment two
With reference to Fig. 2, it is shown that the structural representation of the another kind of protection circuit of the embodiment of the present invention, wherein, described protection
Module can include pull-up circuit 221, bleeder circuit 222 and charging circuit 223；Also include: inverse inserting-preventing circuit 224, overvoltage are inclined
Circuits 225 and overvoltage circuit 226；Wherein,
The outfan of described pull-up circuit 221 is connected with the first pin 2A of described FPDP 23, described pull-up circuit
The input of 221 is connected with the three-prong 2C of described processing module 21, and wherein said first pin 2A, such as data pins.Institute
State pull-up circuit 221, for according to described first signal received, to the first pin input described first of described FPDP
Predeterminated voltage, so that the first pin of described FPDP is high level；According to described 3rd signal received, to described data
First pin of port inputs described second predeterminated voltage, so that the first pin of described FPDP is low level；.
The input of described bleeder circuit 222 is connected with the second pin 2B of described FPDP 23, described bleeder circuit
The outfan of 222 is connected with the 4th pin 2D of described processing module 21.Described bleeder circuit 222, for described data terminal
Carrying out dividing potential drop and exporting the first voltage of second pin of mouth, so that described monitoring submodule is according to described first voltage, monitors
Whether described mobile terminal is in non-charged state.
One input of described charging circuit 223 is connected with the second pin 2B of described FPDP 23, described charging
Another input of circuit 223 is connected with the 5th pin 2E of described processing module 21；Described charging circuit 223, for root
According to the described secondary signal received, switch to low pressure charge mode from high-voltage charging pattern；According to described 4th signal received,
High-voltage charging pattern is switched to from low pressure charge mode.
Described inverse inserting-preventing circuit 224, connects the second pin 2B of described FPDP 23 and described overvoltage biasing circuit 225
Input.
Described overvoltage biasing circuit 225, connects the outfan of described inverse inserting-preventing circuit 224 and the input of overvoltage circuit 226
End.
Described overvoltage circuit 226, connects the outfan of described overvoltage biasing circuit 225 and the defeated of described charging circuit 223
Enter end, and connect the outfan of described overvoltage biasing circuit 225 and the input of described bleeder circuit 222.
Described inverse inserting-preventing circuit 224, for preventing the anti-plug of charger；Described overvoltage biasing circuit 225 and described overvoltage
For preventing, charger voltage is excessive causes burning of FPDP to circuit 226；Described inverse inserting-preventing circuit 224, described overvoltage is inclined
Circuits 225 and described overvoltage circuit 226 collectively constitute protection circuit 220.
Wherein, charging circuit 223 described in the present embodiment can include high-voltage charging unit 2231 and low pressure charhing unit
2232, described high-voltage charging unit 2231 has been used for the high-voltage charging function of mobile terminal, described low pressure charhing unit 2232
For completing the function of mobile terminal low pressure charging.
Second voltage of the second pin 2B of described FPDP 23, passes sequentially through inverse inserting-preventing circuit 224, overvoltage biased electrical
Road 225 and overvoltage circuit 226, respectively enter described bleeder circuit 222 and described charging circuit 223, and voltage swing keeps not
Become.
In the embodiment of the present invention, the pin Inpin of FPDP 23 is directly connected to pin Outpin, wherein, mobile whole
Holding when charging, the pin corresponding with charger for pin Inpin of FPDP 23 connects.
With reference to Fig. 3, it is shown that the structural representation of a kind of protection module of the embodiment of the present invention, the of described FPDP
One pin 3A is connected with the outfan of pull-up circuit, and the second pin 3B is connected with the input of protection circuit 320；Protection circuit
The outfan of 320 and the input of bleeder circuit 322, and be connected with the input of charging circuit 323；Wherein said dividing potential drop electricity
Road 322 includes at least two divider resistance R1 and R2；Equiva lent impedance between first pin 3A and the second pin 3B is RZ.
With reference to Fig. 4, it is shown that the equivalent circuit signal of embodiment of the present invention FPDP, bleeder circuit and protection circuit
Figure；Protection circuit 420 and the biasing resistor RX over the ground of bleeder circuit 422 equivalence in figure, the described RX of biasing resistor over the ground is with described
Equiva lent impedance RZ is in parallel.
Embodiment three
With reference to Fig. 5, it is shown that the structural representation of the another kind of protection circuit of the embodiment of the present invention；Wherein, described process
Module 51, sends submodule 512, such as institute in above-described embodiment one including obtaining submodule 510, monitoring submodule 511 and signal
State, do not repeat them here.
In the present embodiment, described monitoring submodule 511 includes: first computing unit the 5111, first Condition Monitoring Unit
5112, the second computing unit 5113 and the second Condition Monitoring Unit 5114.
Described first computing unit 5111, for according to described first voltage, calculates the second voltage of described FPDP.
Described first Condition Monitoring Unit 5112, for according to described second voltage, monitors whether described mobile terminal is located
In non-charged state.
Described second computing unit 5113, for according to described first voltage and described first predeterminated voltage, calculates described
The equiva lent impedance of FPDP.
Described second Condition Monitoring Unit 5114, for according to described equiva lent impedance, monitors whether described mobile terminal is located
In etch state.
Wherein, described first Condition Monitoring Unit 5112, determine son including the first judgment sub-unit 5112A and charged state
Unit 5112B.Described first judgment sub-unit 5112A, pre-conditioned for judging whether the second voltage meets first；Described fill
Electricity condition determines subelement 5112B, for when described second voltage meet first pre-conditioned time, determine at described mobile terminal
In non-charged state；When described second voltage be unsatisfactory for first pre-conditioned time, determine that described mobile terminal is in charged state.
Described second Condition Monitoring Unit 5114, determines subelement including the second judgment sub-unit 5114A and etch state
5114B.Described second judges submodule 5114A, is used for judging whether equiva lent impedance meets second pre-conditioned；Described corrosion shape
State determines subelement 5114B, for when described equiva lent impedance meet second pre-conditioned time, determine that described FPDP is in corruption
Erosion state；When described equiva lent impedance be unsatisfactory for second pre-conditioned time, determine that described FPDP is in non-corrosive state.
Described signal send submodule 512, for when described second voltage meet first pre-conditioned time, perform to described
Protection module sends the step of the first signal；When described second voltage be unsatisfactory for first pre-conditioned time, to described protection module
Send the 3rd signal；When described equiva lent impedance meet second pre-conditioned time, perform to described protection module send secondary signal
Step；When described equiva lent impedance be unsatisfactory for second pre-conditioned time, to described protection module send the 4th signal.
Whether the embodiment of the present invention, after charger removes, is in corrosion by mobile terminal monitored described FPDP 53
State, therefore, it can judge whether charger is removed by processing module 51 described in described mobile terminal.Owing to filling
When electrical equipment does not removes, the voltage of the second pin 5B of described FPDP 53 is equal to the voltage of charger output；And work as charger
When removing, the voltage of described second pin 5B can be much smaller than the output voltage of charger, and described first predeterminated voltage is less than filling
Piezoelectric voltage, therefore, whether mobile terminal is in non-charged state, can judge according to the size of described second voltage；Therefore, institute
State the first computing unit 5111, can be according to described first voltage, and divider resistance R1 and R2 in bleeder circuit 322 in Fig. 3
Value, calculate described second voltage；By described first judgment sub-unit 5112A, it is judged that whether described second voltage meets
First is pre-conditioned；The described first pre-conditioned voltage setting that can export according to charger, such as, owing to charger does not moves
Except time, described second voltage is 9V or 12V, and described first predeterminated voltage can be set to 3.3V；Therefore, it can first pre-conditioned
It is set to less than 8V；Described charged state determines subelement 5112B, for when described second voltage meet first pre-conditioned time,
Determine that mobile terminal is in non-charged state；Described signal sends submodule 512, sends the first letter to described pull-up circuit 521
Number；Described charged state determines subelement 5112B, for when described second voltage be unsatisfactory for first pre-conditioned time, mobile eventually
End is in charged state；Described signal sends submodule 512, sends the 3rd signal to described pull-up circuit 521.Described protection mould
The pull-up circuit 521 of block, when receiving described three signal, exports the second predeterminated voltage to the 5A pin of described FPDP
Such as 0V, so that the voltage of the first pin of described FPDP 53 is the second predeterminated voltage,；Now, the second Condition Monitoring Unit
5114 without monitoring whether described FPDP 53 is in etch state；When receiving described first signal, to described data
The 5A pin of port exports the first predeterminated voltage such as 3.3V, so that the voltage of the first pin of described FPDP 53 is first pre-
If voltage；Now, the second Condition Monitoring Unit 5114 can start to monitor whether described FPDP 53 is in etch state, tool
Body includes:
As shown in Figure 3 or Figure 4, equiva lent impedance RZ between the first pin 5A and the second pin 5B of FPDP 53；Work as institute
State FPDP 53 time corrosion does not occurs, between the first pin 5A and the second pin 5B of described FPDP 53, there is not equivalence
Impedance RZ, i.e. RZ are infinitely great, are equivalent to open circuit between the first pin 5A and the second pin 5B；But when described FPDP 53 goes out
When now corroding, between the first pin 5A and the second pin 5B of described FPDP 53, there is equiva lent impedance RZ；Wherein, described etc.
The value of effect impedance RZ changes according to extent of corrosion, and when extent of corrosion is the biggest, described equiva lent impedance RZ is the least, otherwise, otherwise.When
After charger removes, the voltage of described first pin 5A is set to the first predeterminated voltage, if corruption does not occurs in described FPDP 53
Erosion, the voltage of the most described second pin 5B is zero；If there is corrosion, the voltage of the most described second pin 5B in described FPDP 53
Change according to the change of described equivalent impedance；Therefore, it can according to described equiva lent impedance, whether to judge described FPDP
It is in etch state.
As shown in Figure 4, the described RX of biasing resistor over the ground is in parallel with described equiva lent impedance RZ；Wherein, described biased electrical over the ground
Root resistance is according to the actual connected mode of circuit and being worth to of each components and parts, when connecting the circuit value with each components and parts and determining, institute
State ground biasing resistor it was determined that general, the value of described ground biasing resistor is the most available after circuit design completes.Therefore,
Described second computing unit 5113 can be according to described first voltage and the first predeterminated voltage, with known biasing resistor over the ground
RX, calculates described equiva lent impedance RZ；Described second Condition Monitoring Unit 5114 can monitor described according to described equiva lent impedance RZ
Whether FPDP 53 is in etch state.Concrete, described second judgment sub-unit 5114A can be according to described equiva lent impedance
RZ and second pre-conditioned, it is judged that whether described FPDP is in etch state；Owing to, in prior art, charger end is waiting
Effect impedance is when reaching certain value, turns off charging process, therefore, described second pre-conditioned can be according in prior art, charging
When device turns off charging process, equivalent impedance is arranged, and such as, when charger turns off charging process, equiva lent impedance is 10k Ω, in order to
Turning off before charging process at charger, charging voltage switches to low pressure charging, described second pre-conditioned could be arranged to
Less than or equal to 100k Ω；It is described second pre-that described etch state determines that subelement 5114B can meet in described equiva lent impedance
If during condition, determine that described FPDP 53 is in etch state；Now, described signal sends submodule 513 to described charging
Circuit sends secondary signal.Described charging circuit 523, according to described secondary signal, switches to low pressure charging from high-voltage charging pattern
Pattern, utilizes and is charged mobile terminal from low pressure charhing unit 5232 by charging circuit 523, to turn off charging at charger
Before process, switch to low pressure charge mode, slow down the speed that described FPDP is corroded.
After corrosive deposit enters FPDP a period of time, may volatilize so that described FPDP is the most rotten
Erosion, is charged at this point it is possible to continue with low pressure charge mode described mobile terminal；High-voltage charging mould can also be switched to
Mobile terminal is charged by formula, to accelerate the charging rate of described mobile terminal, improves Consumer's Experience.Therefore, when described corruption
Erosion state determines that subelement 5114B determines when described FPDP is in non-corrosive state, and described signal sends submodule 512,
The 4th signal is sent to described charging circuit 523.Described charging circuit 523 is according to described 4th signal, from low pressure charge mode
Switch to high-voltage charging pattern, utilize high-voltage charging unit 5231 that mobile terminal is charged, so that mobile whole monitoring
When end is in non-corrosive state, recover high-voltage charging function.
Embodiment four
With reference to Fig. 6, it is shown that the flow chart of steps of a kind of means of defence of the embodiment of the present invention；
On the basis of the protection circuit described in embodiment one, the means of defence being applied to described mobile terminal is said
Bright, specifically comprise the following steps that
Step S601, obtain the first voltage of the protection module of described mobile terminal.
The embodiment of the present invention is after pulling out charger, when mobile terminal is in non-charged state, by the place of mobile terminal
Whether reason module monitors FPDP is in etch state；Therefore, what processing module can prejudge described mobile terminal is
No being in non-charged state, therefore, described processing module can be by obtaining the first electricity of the protection module of described mobile terminal
Pressure, according to described first voltage, it is judged that whether described mobile terminal is in non-charged state.
Step S602, according to described first voltage, monitor whether described mobile terminal is in non-charged state.
After obtaining the first voltage, according to described first voltage, processing module can monitor whether described mobile terminal is in
Non-charged state, so that processing module is when determining that described mobile terminal is in non-charged state, processes accordingly.
Step S603, when monitoring described mobile terminal and being in non-charged state, to described protection module send first
Signal, so that described protection module exports the first predeterminated voltage to the FPDP of described mobile terminal.
Processing module determines when described mobile terminal is in non-charged state, then send the first letter to described protection module
Number, described protection module, according to the first signal described in reception, exports first to the FPDP of described mobile terminal and presets
Voltage, more whether the FPDP monitoring described mobile terminal be in etch state；Wherein, described first predeterminated voltage can set
It is set to less than charger charging voltage, such as 3.3V.
Step S604, according to described first voltage and the first predeterminated voltage, monitor whether described FPDP is in corrosion
State.
After corrosive deposit enters FPDP, FPDP is constantly corroded；When described FPDP is corroded degree
When reaching pre-conditioned, determine that described FPDP is in etch state.Therefore, described processing module, according to described first electricity
Pressure and the first predeterminated voltage, whether Monitoring Data port is in etch state.
Step S605, when monitoring described FPDP and being in etch state, to described protection module send second letter
Number, so that described protection module switches to low pressure charge mode from high-voltage charging pattern.
When processing module monitor FPDP be in etch state time, processing module can to protection module send second
Signal, protection module, according to the secondary signal received, switches to low pressure charge mode from high-voltage charging pattern, so that filling plugging
During electrical equipment, utilize voltage charging mode that mobile terminal is charged.
The embodiment of the present invention is when charger removes, and whether is in corrosion shape by monitoring data of mobile terminal port
State；Concrete, by obtaining whether the first voltage monitoring mobile terminal of described protection module is in non-charged state, work as monitoring
To mobile terminal be in non-charged state time, send the first signal to protection module；So that described protection module is to described data
Port exports the first predetermined level；Further according to the first voltage and described first predeterminated voltage, monitor whether described FPDP is located
In etch state；When detecting that FPDP is in etch state, send secondary signal to described protection module, so that protection
Charge mode is switched to low pressure charge mode by high-voltage charging pattern by module；To slow down the speed that FPDP is corroded, fall
There is the probability of charge fault in low mobile terminal.
Embodiment five
With reference to Fig. 7, it is shown that the flow chart of steps of the another kind of means of defence of the embodiment of the present invention；
On the basis of the mobile terminal described in embodiment three, the means of defence being applied to described mobile terminal is said
Bright, specifically comprise the following steps that
Step S701, obtain the first voltage of the protection module of described mobile terminal.
Whether the embodiment of the present invention, after charger removes, is in corrosion shape by mobile terminal monitored described FPDP
State, therefore, it can judge whether charger is removed by processing module described in described mobile terminal.Due at charger
When not removing, the second voltage of the second pin of described FPDP is equal to the voltage of charger output；And when charger removes
Time, described second voltage can be much smaller than the output voltage of charger, and described first predeterminated voltage is less than charging voltage, therefore,
Whether mobile terminal is in non-charged state, can judge according to the size of described second voltage；And described second voltage is permissible
Calculate according to described first voltage, therefore, it can obtain described first voltage, to judge whether described mobile terminal is in non-filling
Electricity condition.
Step S702, according to described first voltage, calculate the second voltage of described FPDP.
From the figure 3, it may be seen that bleeder circuit carries out dividing potential drop by resistance R1 Yu R2 to described second voltage, therefore, it can by institute
State the first voltage and the value of resistance R1 Yu R2, calculate described second voltage, to judge whether mobile terminal is in non-charging shape
State.
Step S703, to judge whether described second voltage meets first pre-conditioned.
Can be first pre-conditioned by judging whether described second voltage meets, non-to determine whether mobile terminal is in
Charged state；Wherein, described first pre-conditioned can determine according to the charging voltage of charger；Such as, charging voltage is 9V
Or 12V, then first pre-conditioned could be arranged to less than 8V.
Step S704, when described second voltage meet first pre-conditioned time, determine that described mobile terminal is in non-charging
State, sends the first signal to described protection module.
When monitor described second voltage meet first pre-conditioned time, it may be determined that the charger of mobile terminal is moved
Remove, i.e. determine that described mobile terminal is in non-charged state, send the first signal to described protection module, so that described protection mould
Tuber, according to the first described signal, sends the first predeterminated voltage to the first pin of FPDP；Now, processing module can be opened
Whether beginning Monitoring Data port is in etch state；Wherein said first predeterminated voltage may be configured as less than charging voltage, such as
3.3V。
Step S705, when described second voltage be unsatisfactory for first pre-conditioned time, determine that described mobile terminal is in charging
State, sends the 3rd signal to described protection module.
When monitor described second voltage be unsatisfactory for first pre-conditioned time, it may be determined that the charger of mobile terminal not by
Remove, i.e. determine that described mobile terminal is in charged state, now, then send the 3rd signal to described protection module, so that institute
State protection module according to the 3rd described signal, send the second predeterminated voltage to the first pin of FPDP；Now, mould is processed
Whether block is in etch state without Monitoring Data port, and wherein, described second predeterminated voltage is set to 0V.
Step S706, according to described first voltage and the first predeterminated voltage, calculate the equiva lent impedance of described FPDP.
Described equiva lent impedance is the equiva lent impedance between FPDP the first pin and the second pin；Equiva lent impedance is the least,
The extent of corrosion of FPDP is the biggest；Therefore, it can the size according to equiva lent impedance, it is judged that the extent of corrosion of FPDP.Can
With described first voltage and the value of resistance R1 Yu R2, calculate described second voltage, further according to described second voltage, first preset
Voltage and biasing resistor over the ground, calculate equiva lent impedance.
Step S707, to judge whether described equiva lent impedance meets second pre-conditioned.
The extent of corrosion of FPDP, judges according to the size of equiva lent impedance；When equiva lent impedance, to meet second pre-conditioned
Time, determine that FPDP is in etch state；Therefore, it can whether to be met by equiva lent impedance second pre-conditioned, determine number
Whether it is in etch state according to port.
Step S708, when described equiva lent impedance meet second pre-conditioned time, determine that described FPDP is in corrosion shape
State, sends secondary signal to described protection module.
When described equiva lent impedance meet second pre-conditioned time, determine that described FPDP is in etch state, now, to
Described protection module sends secondary signal, so that the charge mode of mobile terminal is switched to low pressure charging mould by high-voltage charging pattern
Formula, to slow down the speed that FPDP is corroded.
Step S709, when described equiva lent impedance be unsatisfactory for second pre-conditioned time, determine that described FPDP is in non-corruption
Erosion state, sends the 4th signal to described protection module.
After corrosive deposit enters FPDP a period of time, may volatilize so that described FPDP is the most rotten
Erosion, is charged at this point it is possible to continue with low pressure charge mode described mobile terminal；High-voltage charging mould can also be switched to
Formula, to accelerate the charging rate of described mobile terminal, improves Consumer's Experience.Therefore, when described equiva lent impedance, to be unsatisfactory for second pre-
If during condition, determine that described FPDP is in non-corrosive state, send the 4th signal to described protection module, so that described anti-
Protect the module the 4th signal according to reception, switch to high-voltage charging pattern from low pressure charge mode.
The means of defence that the embodiment of the present invention proposes, when detecting that described FPDP is in etch state, to described
Charging circuit sends secondary signal, makes described charging circuit switch to low pressure charge mode from high-voltage charging pattern so that filling
During electricity, described mobile terminal is carried out low pressure charging, to slow down the corrosion rate of described FPDP；When corrosive deposit volatilizees
After, detect when described FPDP is in non-corrosive state, send the 4th signal to described charging circuit, make described charged electrical
Road switches to high-voltage charging pattern from low pressure charge mode, recovers the high-voltage charging function of described mobile terminal, strengthens user's body
Test.
Those of ordinary skill in the art are it is to be appreciated that combine that the disclosed embodiments in the embodiment of the present invention describe is each
The unit of example and algorithm steps, it is possible to being implemented in combination in of electronic hardware or computer software and electronic hardware.These
Function performs with hardware or software mode actually, depends on application-specific and the design constraint of technical scheme.Specialty
Technical staff specifically should can be used for using different methods to realize described function to each, but this realization should not
Think beyond the scope of this invention.
Those skilled in the art is it can be understood that arrive, for convenience and simplicity of description, the system of foregoing description,
The specific works process of device and unit, is referred to the corresponding process in preceding method embodiment, does not repeats them here.
In embodiment provided herein, it should be understood that disclosed apparatus and method, can be passed through other
Mode realizes.Such as, device embodiment described above is only schematically, such as, the division of described unit, it is only
A kind of logic function divides, actual can have when realizing other dividing mode, the most multiple unit or assembly can in conjunction with or
Person is desirably integrated into another system, or some features can be ignored, or does not performs.Another point, shown or discussed is mutual
Between coupling direct-coupling or communication connection can be the INDIRECT COUPLING by some interfaces, device or unit or communication link
Connect, can be electrical, machinery or other form.
The described unit illustrated as separating component can be or may not be physically separate, shows as unit
The parts shown can be or may not be physical location, i.e. may be located at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected according to the actual needs to realize the mesh of the present embodiment scheme
's.
It addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, it is also possible to
It is that unit is individually physically present, it is also possible to two or more unit are integrated in a unit.
If described function is using the form realization of SFU software functional unit and as independent production marketing or use, permissible
It is stored in a computer read/write memory medium.Based on such understanding, technical scheme is the most in other words
The part contributing prior art or the part of this technical scheme can embody with the form of software product, this meter
Calculation machine software product is stored in a storage medium, including some instructions with so that a computer equipment (can be individual
People's computer, server, or the network equipment etc.) perform all or part of step of method described in each embodiment of the present invention.
And aforesaid storage medium includes: USB flash disk, portable hard drive, ROM, RAM, magnetic disc or CD etc. are various can store program code
Medium.
The above, the only detailed description of the invention of the present invention, but protection scope of the present invention is not limited thereto, and any
Those familiar with the art, in the technical scope that the invention discloses, can readily occur in change or replace, should contain
Cover within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with scope of the claims.
Claims (15)
1. a protection circuit, it is characterised in that including: processing module and protection module, wherein, described processing module includes obtaining
Take submodule, monitor submodule and signal transmission submodule, wherein,
Described acquisition submodule, for obtaining the first voltage of described protection module；
Described monitoring submodule, for according to described first voltage, whether monitoring mobile terminal is in non-charged state；And root
According to described first voltage and the first predeterminated voltage, whether the FPDP monitoring described mobile terminal is in etch state；
Described signal sends submodule, for being in non-charged state when described monitoring submodule monitors described mobile terminal
Time, send the first signal to described protection module；It is in etch state when described monitoring submodule monitors described FPDP
Time, send secondary signal to described protection module；
Described protection module, for when receiving described first signal, presets electricity to described FPDP output described first
Pressure；When receiving described secondary signal, switch to low pressure charge mode from high-voltage charging pattern.
Circuit the most according to claim 1, it is characterised in that described monitoring submodule, including:
First computing unit, for according to described first voltage, calculates the second voltage of described FPDP；
First Condition Monitoring Unit, for according to described second voltage, monitors whether described mobile terminal is in non-charged state.
Circuit the most according to claim 2, it is characterised in that described first Condition Monitoring Unit, including:
First judgment sub-unit, is used for judging whether described second voltage meets first pre-conditioned；
Charged state determines subelement, for when described second voltage meet first pre-conditioned time, determine described mobile terminal
It is in non-charged state；When described second voltage be unsatisfactory for first pre-conditioned time, determine that described mobile terminal is in charging shape
State.
Circuit the most according to claim 1, it is characterised in that described monitoring submodule, including:
Second computing unit, for according to described first voltage and described first predeterminated voltage, calculate described FPDP etc.
Effect impedance；
Second Condition Monitoring Unit, for according to described equiva lent impedance, monitors whether described FPDP is in etch state.
Circuit the most according to claim 2, it is characterised in that described second Condition Monitoring Unit, also includes:
Second judgment sub-unit, is used for judging whether described equiva lent impedance meets second pre-conditioned；
Etch state determines subelement, for when described equiva lent impedance meet second pre-conditioned time, determine described FPDP
It is in etch state；When described equiva lent impedance be unsatisfactory for second pre-conditioned time, determine that described FPDP is in non-corrosive shape
State.
Circuit the most according to claim 1, it is characterised in that
Described signal sends submodule, is additionally operable to be in charged state when described monitoring submodule monitors described mobile terminal
Time, send for making described protection module export the 3rd signal of the second predeterminated voltage to described protection module；When described monitoring
Submodule monitors described FPDP when being in non-corrosive state, sends to described protection module and is used for making described protection module
The 4th signal of high-voltage charging pattern is switched to from low pressure charge mode.
Circuit the most according to claim 1, it is characterised in that described protection module, including pull-up circuit, bleeder circuit and
Charging circuit, wherein,
Described pull-up circuit, connects the outfan of described processing module and the first pin of described FPDP；Described dividing potential drop electricity
Road, connects the outfan of described processing module and the second pin of described FPDP；Described charging circuit, connects described process
The outfan of module and the second pin of described FPDP；
Described bleeder circuit, for carrying out dividing potential drop and exporting the first voltage the second pin of described FPDP, so that institute
State monitoring submodule according to described first voltage, monitor whether described mobile terminal is in non-charged state；
Described pull-up circuit, for according to described first signal received, described to the first pin input of described FPDP
First predeterminated voltage, so that the first pin of described FPDP is high level；According to described 3rd signal received, to described
First pin of FPDP inputs described second predeterminated voltage, so that the first pin of described FPDP is low level；
Described charging circuit, for according to the described secondary signal received, switching to low pressure charge mode from high-voltage charging pattern；
According to described 4th signal received, switch to high-voltage charging pattern from low pressure charge mode.
Circuit the most according to claim 7, it is characterised in that described protection module, also includes: inverse inserting-preventing circuit, overvoltage
Biasing circuit and overvoltage circuit, wherein,
Described inverse inserting-preventing circuit, connects the second pin of described FPDP and the input of described overvoltage biasing circuit；
Described overvoltage biasing circuit, connects the outfan of described inverse inserting-preventing circuit and the input of overvoltage circuit；
Described overvoltage circuit, connects the outfan of described overvoltage biasing circuit and the input of described charging circuit, and connects
The outfan of described overvoltage biasing circuit and the input of described bleeder circuit.
9. a mobile terminal, it is characterised in that include the protection circuit described in claim 1-8 any one.
10. a means of defence, is applied to mobile terminal, it is characterised in that including:
Obtain the first voltage of described protection module；
According to described first voltage, monitor whether described mobile terminal is in non-charged state；When monitoring described mobile terminal
When being in non-charged state, send the first signal to described protection module, so that described protection module is to described mobile terminal
FPDP exports the first predeterminated voltage；
According to described first voltage and the first predeterminated voltage, monitor whether described FPDP is in etch state；When monitoring
At described FPDP during etch state, send secondary signal to described protection module, so that described protection module fills from high pressure
Power mode switches to low pressure charge mode.
11. methods according to claim 10, it is characterised in that described according to described first voltage, monitor described movement
Whether terminal is in the step of non-charged state, including:
According to described first voltage, calculate the second voltage of described FPDP；
According to described second voltage, monitor whether described mobile terminal is in non-charged state.
12. methods according to claim 11, it is characterised in that described according to described second voltage, monitor described movement
Whether terminal is in the step of non-charged state, including:
Judge whether described second voltage meets first pre-conditioned；
When described second voltage meet first pre-conditioned time, determine that described mobile terminal is in non-charged state；
When described second voltage be unsatisfactory for first pre-conditioned time, determine that described mobile terminal is in charged state.
13. methods according to claim 10, it is characterised in that described according to the default electricity of described first voltage and first
Pressure, monitors whether described FPDP is in the step of etch state, including:
According to described first voltage and the first predeterminated voltage, calculate the equiva lent impedance of described FPDP；
According to described equiva lent impedance, monitor whether described FPDP is in etch state.
14. methods according to claim 13, it is characterised in that described according to described equiva lent impedance, monitor described data
Whether port is in the step of etch state, including:
Judge whether described equiva lent impedance meets second pre-conditioned；
When described equiva lent impedance meet second pre-conditioned time, determine that described FPDP is in etch state；
When described equiva lent impedance be unsatisfactory for second pre-conditioned time, determine that described FPDP is in non-corrosive state.
15. methods according to claim 10, it is characterised in that also include:
When monitoring described mobile terminal and being in charged state, send the 3rd signal to described protection module, so that described anti-
Protect module and export the second predeterminated voltage to the FPDP of described mobile terminal；It is in non-corrosive when monitoring described FPDP
During state, send the 4th signal to described protection module, fill so that described protection module switches to high pressure from low pressure charge mode
Power mode.
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| CN106058975B (en) | 2019-01-29 |
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