CN103715726B - Charging device and method for AC charger - Google Patents
Charging device and method for AC charger Download PDFInfo
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- CN103715726B CN103715726B CN201210378100.9A CN201210378100A CN103715726B CN 103715726 B CN103715726 B CN 103715726B CN 201210378100 A CN201210378100 A CN 201210378100A CN 103715726 B CN103715726 B CN 103715726B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention provides a kind of charging device for AC charger and method, wherein, the nominal current of AC charger whether is reached by the input current of current detection circuit detection current input terminal, when the input current of described current input terminal is less than the nominal current of AC charger, described current detection circuit controls described charging close port and enables；Under described charging close port enables, described supply port stops powering to battery to be charged, avoid during using AC charger that mobile phone is charged, mobile phone is often occurred to stop suddenly charging, start again to continue charging after stopping charging a period of time, problem the most repeatedly, and then improve the service life of battery of mobile phone.
Description
Technical field
The present invention relates to mobile phone charging technique field, particularly to a kind of charging device for AC charger and method.
Background technology
Along with development and the raising of people's living standard of science and technology, the use of mobile phone is more and more universal, and it has become
The indispensable communication tool carried with for more and more personages.Mobile phone is typically with battery, and institute's charged pool has certain
Stand-by time and/or air time, it is required for charging in use for some time.In prior art, the conventional charging side of mobile phone
Formula specifically includes that AC charging and USB charge, and wherein AC charging generally uses AC charger.When carry out AC charging time, by mobile phone with
AC charger connects, and AC charger is connected with household electrical source (usually 220V alternating voltage), can realize the charging to mobile phone.
But, during using AC charger that mobile phone is charged, often occur mobile phone to stop suddenly charging, stopping charging
Start again after a period of time to continue charging, situation the most repeatedly.This situation greatly reduces battery of mobile phone
Life-span, simultaneously also annoying those skilled in the art.
Summary of the invention
It is an object of the invention to provide a kind of charging device for AC charger and method, to solve in prior art
During using AC charger that mobile phone is charged, often occur mobile phone to stop suddenly charging, stopping charging one section
Start again after time to continue charging, problem the most repeatedly.
For solving above-mentioned technical problem, the present invention provides a kind of charging device for AC charger, including:
Power Management Unit, described Power Management Unit includes charging port, charging close port and supply port, its
In, described supply port is in order to be connected with a battery to be charged；
Current detection circuit, described current detection circuit is connected with described charging close port；
Current input terminal, described current input terminal is connected with described current detection circuit and charging port respectively；
Whether described current detection circuit reaches the mark of AC charger in order to the input current detecting described current input terminal
Claim electric current, when the input current of described current input terminal is less than the nominal current of AC charger, described current detection circuit control
Make described charging close port to enable；Under described charging close port enables, described supply port stops to battery to be charged
Power supply.
Optionally, described in the charging device of AC charger, described current detection circuit is by input electricity
Voltage corresponding to stream is made comparisons with the voltage corresponding to the nominal current of AC charger, to judge whether input current reaches AC
The nominal current of charger.
Optionally, described in the charging device of AC charger, described charging detecting circuit includes a comparator,
Described comparator includes first comparing input, second comparing input and compare outfan, corresponding to described input current
Voltage input compares input to first, and the input of the voltage corresponding to nominal current of described AC charger compares input to second
End, the described outfan that compares is connected with described charging close port.
Optionally, described in the charging device of AC charger, described current detection circuit also includes the second electricity
Resistance and the 3rd resistance；
Described first compares input and the connection of the first resistance, and described first resistance is connected with described current input terminal；
Described second compares input is connected with described second resistance, and described second resistance is with described current input terminal even
Connect；Described second compares input is also connected with described 3rd resistance, described 3rd resistance eutral grounding.
Optionally, described in the charging device of AC charger, described first resistance, the second resistance and the 3rd electricity
Hinder and meet following relation:
Wherein, R1、R2And R3Represent the first resistance, the second resistance and the resistance of the 3rd resistance respectively；V1Represent electric current input
Magnitude of voltage corresponding to end；Icharger_standRepresent the nominal current value of AC charger.
Optionally, described in the charging device of AC charger, described charging close port high level enables；When
First compare input input voltage than second compare input input voltage big time, described comparator output high level；When
One compare input input voltage than second compare input input voltage little or equal time, described comparator export low electricity
Flat.
Optionally, described in the charging device of AC charger, described first resistance also with described charging port
Connect；Described first resistance is also connected with an electric capacity, described capacity earth.
Optionally, described in the charging device of AC charger, described Power Management Unit also includes general end
Mouthful, described current detection circuit is also connected with described universal port, described universal port output control signal, described control signal
Whether control the work of described current detection circuit.
Optionally, described in the charging device of AC charger, also include baseband chip,
When the input current of described current input terminal is less than the nominal current of AC charger, described Power Management Unit is produced
Baseband chip described in raw interrupt notification, described baseband chip controls described universal port output control signal to control described electric current
Testing circuit quits work, and it is USB charge mode that the most described baseband chip arranges the charge mode of described Power Management Unit；
When described baseband chip detects that the work of described current detection circuit reaches certain time, described baseband chip control
Make described universal port output control signal to quit work to control described current detection circuit.
The present invention also provides for a kind of charging method for AC charger, including:
Current input terminal provides input current to the charging port of current detection circuit and Power Management Unit respectively；
Current detection circuit judges whether input current reaches the nominal current of AC charger；
If described input current controls power management list less than the nominal current of AC charger, the most described current detection circuit
The charging close port of unit enables；Under described charging close port enables, described supply port stops supplying to battery to be charged
Electricity.
Optionally, described in the charging method of AC charger, described current detection circuit is by input electricity
Voltage corresponding to stream is made comparisons with the voltage corresponding to the nominal current of AC charger, to judge whether input current reaches AC
The nominal current of charger.
Optionally, described in the charging method of AC charger, if the input current of described current input terminal is little
In the nominal current of AC charger, described Power Management Unit produces interrupt notification baseband chip, and described baseband chip controls logical
Quitting work to control described current detection circuit by port output control signal, the most described baseband chip arranges described power supply
The charge mode of administrative unit is USB charge mode.
Optionally, described in the charging method of AC charger, when current detection circuit starts to perform to judge defeated
When entering the nominal current whether electric current reaches AC charger, the working time of described current detection circuit is supervised by baseband chip
Surveying, when described baseband chip detects that the work of described current detection circuit reaches certain time, described baseband chip controls institute
State universal port output control signal to quit work to control described current detection circuit.
In the charging device for AC charger and method of present invention offer, current detection circuit detection electric current input
Whether the input current of end reaches the nominal current of AC charger, when the input current of described current input terminal is less than AC charger
Nominal current time, described current detection circuit control described charging close port enable；Enable in described charging close port
Under, described supply port stops powering to battery to be charged, it is to avoid in the process using AC charger to be charged mobile phone
In, often occur mobile phone to stop suddenly charging, after stopping charging a period of time, start again to continue charging, asking the most repeatedly
Topic, and then improve the service life of battery of mobile phone.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the existing charging device for AC charger；
Fig. 2 is the circuit diagram of the charging device for AC charger of the embodiment of the present invention；
Fig. 3 is one of schematic flow sheet of charging method for AC charger of the embodiment of the present invention；
Fig. 4 is the two of the schematic flow sheet of the charging method for AC charger of the embodiment of the present invention.
Detailed description of the invention
The charging device for AC charger proposed the present invention below in conjunction with the drawings and specific embodiments and method are made
Further describe.According to following explanation and claims, advantages and features of the invention will be apparent from.It should be noted that
It is that accompanying drawing all uses the form simplified very much and all uses non-ratio accurately, only in order to facilitate, to aid in illustrating this lucidly
The purpose of bright embodiment.
In prior art, during using AC charger that mobile phone is charged, mobile phone is often occurred to stop suddenly
Charging, starts again to continue charging, situation the most repeatedly after stopping charging a period of time.The generation of this situation is great
Reduce the life-span of battery of mobile phone, also annoying those skilled in the art simultaneously.
To this end, present inventor is to using the charging device of AC charger to conduct in-depth research in prior art, eventually
In being found that the reason causing this situation.
Refer to Fig. 1, it is the circuit diagram of the existing charging device for AC charger.As it is shown in figure 1, power supply
Administrative unit (PMU) includes charging port (VCHG) and supply port (VBAT), and wherein, described supply port (VBAT) is treated with one
The battery (battery of mobile phone in other words) of charging is connected, and described charging port (VCHG) accesses input current Icharger, described defeated
Enter electric current IchargerConnect external power source by AC charger and (not shown in figure 1) is provided.
Inventor finds, in the case of utilizing the charging of AC charger, described Power Management Unit (PMU) has two kinds and fills
Power mode, respectively AC charge mode and USB charge mode, but in the case of utilizing the charging of AC charger, acquiescence makes
With AC charge mode, (as long as i.e. identifying used is AC charger, described Power Management Unit is the most directly suitable for AC and charges mould
Formula).The charging current that wherein said AC charge mode provides to battery to be charged is relatively big, and its required input current is the most simultaneously
Greatly.
Concrete, under AC charge mode, Power Management Unit (PMU) arranges the electric current inputted from charging port (VCHG)
Nominal current I for AC chargercharger_standIf the AC charger of mark system, it also will provide to Power Management Unit (PMU)
One nominal current, i.e. IchargerNominal current (being nominal value in other words) for AC charger；But the AC being unsatisfactory for nominal fills
Electrical equipment then cannot provide nominal current, specially IchargerLess than nominal current, Power Management Unit (PMU) is from charged electrical simultaneously
Road extraction nominal current, thus will cause the charging current situation that supply falls short of demand.In this case, Power Management Unit
(PMU) will be to electric capacity C0On take out electricity, quickly electric capacity C0On electric charge be evacuated, thus cause filling of Power Management Unit (PMU)
The voltage of electricity port (VCHG) is reduced to below charger identification thresholding, makes Power Management Unit (PMU) be mistakenly considered AC charger
Extract, thus stopped charging；After stopping charging, the voltage of charging port (VCHG) rises rapidly, when arriving AC charging
In limited time, Power Management Unit (PMU) will be considered that AC charger is again inserted to device recognitiion gate, thus starts again at charging.So
Move in circles, just cause battery to be charged charging-stop-... charging-stop situation repeatedly.
Base this, inventor provide the charging device for AC charger of a kind of improvement, concrete, refer to Fig. 2, its
Circuit diagram for the charging device for AC charger of the embodiment of the present invention.As in figure 2 it is shown, it is described for AC charger
Charging device include:
Power Management Unit (PMU) 10, described Power Management Unit 10 includes charging port (VCHG) 11, charging shutdown side
Mouth (CHG_OFF) 12 and supply port (VBAT) 13, wherein, described supply port (VBAT) 13 is in order to a battery to be charged even
Connecing, said supply port (VBAT) 13 is connected with band rechargeable battery 50；
Current detection circuit 20, described current detection circuit 20 is connected with described charging close port (CHG_OFF) 12；
Current input terminal 30, described current input terminal 30 respectively with described current detection circuit 20 and charging port
(VCHG) 11 connect；
Described current detection circuit 20 is in order to detect the input current I of described current input terminal 30chargerWhether reach AC
The nominal current I of chargercharger_stand, as the input current I of described current input terminal 30chargerMark less than AC charger
Claim electric current Icharger_standTime, described current detection circuit 20 control described charging close port (CHG_OFF) 12 enable (even if
Obtain described charging close port 12 to work)；Under described charging close port (CHG_OFF) 12 enables, described supply port
(VBAT) 13 stop powering to battery 50 to be charged.
Thus, as the input current I of described current input terminal 30chargerNominal current less than AC charger
Icharger_standTime, stopping is powered to battery 50 to be charged, is namely stopped for electricity to be charged by supply port (VBAT) 13
The charging in pond, i.e. at input current IchargerNominal current I less than AC chargercharger_standIn the case of, carrying out into one
Before step processes, battery to be charged will always be in stopping the state of charging, the most also avoids using AC charger pair
During mobile phone is charged, often occurs mobile phone to stop suddenly charging, start again to continue after stopping charging a period of time
Continuous charging, problem the most repeatedly, and then improve the service life of battery of mobile phone.
In the present embodiment, described current detection circuit 20 is by input current IchargerCorresponding voltage fills with AC
The nominal current I of electrical equipmentcharger_standCorresponding voltage is made comparisons, to judge input current IchargerWhether reach AC charging
The nominal current I of devicecharger_stand。
In the present embodiment, described current detection circuit 20 realizes input current I especially by following mannercharger's
Judge.Please continue to refer to Fig. 2, concrete, described current detection circuit 20 includes that a comparator M1, described comparator M1 include
One compares input M11 and second compares input M12, and the voltage V2 input value first corresponding to described input current is the most defeated
Entering and hold M11, the input of the voltage V4 corresponding to nominal current of described AC charger compares input M12 to second.
Here, described current detection circuit 20 includes the first detection input 21 and the second detection input 22；Described electricity
Stream input 30 is connected with one first resistance 25, and described first resistance 25 detects input 21 with described first and is connected, and described the
One detection input 21 compares input M11 with described first and is connected；Described current input terminal 30 and described second detection input
End 22 connection, described second detection input 22 is connected with one second resistance 26, and described second resistance 26 compares with described second
Input M12 connects, and described second resistance 26 is also connected with one the 3rd resistance 27, described 3rd resistance 27 also ground connection.
The most in the present embodiment, one end of described second resistance 26 is defeated as the second detection of described current detection circuit 20
Entering end 22, the first of described comparator M1 compares the input M11 the first detection input as described current detection circuit 20
21。
In the present embodiment, described first resistance the 25, second resistance 26 and the 3rd resistance 27 meet following relation:
Wherein, R1、R2And R3Represent the first resistance the 25, second resistance 26 and resistance of the 3rd resistance 27 respectively；V1Represent electricity
Stream magnitude of voltage corresponding to input；Icharger_standRepresent the nominal current value of AC charger.Further, R1 < 1 ohm,
R1<<R3.Wherein, V1Usually specified/specific magnitude of voltage, i.e. through the voltage of AC charger output, usually 5V, because of
This V1Value be the most reliable and the most stable.
In the present embodiment, input electricity is realized by comparator M1, first resistance the 25, second resistance 26 and the 3rd resistance 27
Stream IchargerThe concrete principle of detection is as follows:
For formula (1), it is also possible to resolve into such as following formula (2) and formula (3),
V2=V1-Icharger_stand×R1 (2)
If it is to say, input current IchargerNominal current I for AC chargercharger_stand, then the of comparator M1
One compares input M11 and second, and to compare the input voltage of input M12 identical, i.e. compares voltage identical；If input current
IchargerNominal current I less than AC chargercharger_stand, then V2>V4, i.e. first compares the input voltage ratio of input M11
Second to compare the input voltage of input M12 big；If input current IchargerNominal current more than AC charger
Icharger_stand, then V2<V4, i.e. first compares the input voltage of input M11 than the second input voltage comparing input M12
Little.For input current IchargerNominal current I more than or equal to AC chargercharger_standSituation, input current is all described
IchargerReach the nominal current I of AC chargercharger_stand, namely can treat rechargeable battery in the ac mode and fill
Electricity.
In the present embodiment, described charging close port (CHG_OFF) 12 is that (described high level refers to for power supply high level
For administrative unit, more than/it is high level more than or equal to the level of a certain value, being greater than the level equal to 5.5V is high electricity
Flat.Depending on this is with specific reference to different Power Management Unit, this is not construed as limiting by the application.) enable, say, that described charging
Close port (CHG_OFF) 12 is in the case of receiving high level, and described supply port (VBAT) 13 stops to battery to be charged
50 power supplies.
Therefore, in the present embodiment, input M11 input voltage V is compared when first2Input M12 is compared defeated than second
Enter voltage V4Time big, described comparator M1 output high level (i.e. comparator output terminal voltage V3 is high level)；When first compares
Input M11 input voltage V2Input M12 input voltage V is compared than second4Little or equal time, described comparator M1 export
Low level (i.e. comparator output terminal voltage V3 is low level).
In the present embodiment, described current detection circuit 20 includes an outfan 24, here, the output of described comparator M1
Hold the outfan 24 as described current detection circuit 20, therefore, when comparator M1 exports high level, described current detecting electricity
Road 20 exports high level, and accordingly, described supply port (VBAT) 13 stops powering to battery 50 to be charged；When comparator M1 is defeated
When going out low level, described current detection circuit 20 output low level, accordingly, accordingly, described supply port (VBAT) 13 is just
Often power to battery 50 to be charged.
In the present embodiment, described current input terminal 30 is connected with charging port 11 by the first resistance 25, concrete, institute
Stating current input terminal 30 to be connected with the first resistance 25, described resistance 25 is connected with charging port 11.By above-mentioned connected mode, both
Can be by voltage V corresponding for input current2Input to first and compare input M11, most can simplify circuit structure again, thus reduce product
Product cost.It should be noted that, due to resistance R1 of the first resistance 25 the least (being preferably R1 < 1 ohm at this), therefore voltage V2
Input current I can be characterized wellcharger.Additionally, described first resistance 25 is also connected with electric capacity C1, described electric capacity C1 connects
Ground.Here, namely charging port 11 be connected with electric capacity C1, electric capacity C1 ground connection, thus can ensure the pressure drop of charging port 11, this is
Prior art, the application repeats no more.
Further, described Power Management Unit 10 also includes universal port (GPIO) 14, described current detection circuit 20
Also being connected with described universal port 14, described universal port 14 exports control signal, and described control signal controls the inspection of described electric current
Whether the work of slowdown monitoring circuit 20.Concrete, described universal port 14 is connected with comparator M1, by comparator M1 offer (or
Person does not provides) operation level is to control the duty (work or do not work) of comparator M1, thus control current detecting electricity
The duty on road 20.
It is connected with comparator M1 by on-off circuit at this universal port 14, whether controls the work of described comparator M1,
When this universal port 14 exports high level (same, depending on high level herein is also according to device performance), described comparator
M1 works；During universal port 14 output low level, described comparator M1 stop/not working.The on-off circuit that the present embodiment is selected
(described including the first field-effect transistor P1 (described first field-effect transistor P1 is NMOS), the second field-effect transistor P2
Second field-effect transistor P2 is PMOS), the 4th resistance R5, the 5th resistance R6 and the 6th resistance R7, when universal port 14 exports
During high level, on-off circuit is opened, and provides high level to comparator M1, and comparator M1 works；When universal port 14 exports low electricity
At ordinary times, on-off circuit cuts out, and comparator M1 does not has running voltage, thus do not works.Wherein, described on-off circuit is existing skill
Art, it is also possible to select other on-off circuits, this is repeated no more by the application.
Further, the described charging device for AC charger also includes baseband chip 40, here, utilize described base band
Whether and the mode of operation of described power management chip 10 chip 40 controls the work of Power Management Unit 20 further.Specifically
, as the input current I of described current input terminal 30chargerNominal current I less than AC chargercharger_standTime, described electricity
Source control unit 20 produces baseband chip 40 described in interrupt notification, and described baseband chip 40 controls the output control of described universal port 14
Signal processed quits work to control described current detection circuit 20, and the most described baseband chip 40 arranges described Power Management Unit
The charge mode of 10 is USB charge mode (wherein, defeated compared with needed for AC charge mode of the input current needed for USB charge mode
Enter electric current little, the most thus the required charging interval will be caused longer, therefore, as input current IchargerLess than AC charger
Nominal current Icharger_standTime, it is still able to meet the condition of USB charge mode)；
When described baseband chip 40 detects that the work of described current detection circuit 20 reaches certain time, described base band core
Sheet 40 control described universal port 14 export control signal with control described current detection circuit 20 quit work.Here, it is main
For input current IchargerReach the nominal current I of AC chargercharger_standSituation, measure once initial, input electricity
Stream IchargerReach the nominal current I of AC chargercharger_stand, the most just need not input current IchargerMonitoring, thus
Also power consumption can be reduced.
To sum up, the charging device for AC charger provided by the present embodiment, it is possible to avoid using AC charger
During mobile phone is charged, often occurs mobile phone to stop suddenly charging, start again after stopping charging a period of time
Continue charging, problem the most repeatedly, and then improve the service life of battery of mobile phone.
The present embodiment also provides for a kind of charging method for AC charger, refer to Fig. 3, and it is the embodiment of the present invention
One of schematic flow sheet of charging method for AC charger.As it is shown on figure 3, the described charging method bag for AC charger
Include:
Step S10: current input terminal provides input to the charging port of current detection circuit and Power Management Unit respectively
Electric current；
Step S20: current detection circuit judges whether input current reaches the nominal current of AC charger；
Step S30: if described input current controls electricity less than the nominal current of AC charger, the most described current detection circuit
The charging close port of source control unit enables；Under described charging close port enables, described supply port stops filling to waiting
Electricity battery is powered.
By the detection for input current, just it can be avoided that in the process using AC charger that mobile phone is charged
In, often occur mobile phone to stop suddenly charging, after stopping charging a period of time, start again to continue charging, asking the most repeatedly
Topic, and then improve the service life of battery of mobile phone.
Further, the described charging method for AC charger also includes the monitoring/control for input electric cur-rent measure
Step, specifically refer to Fig. 4, its be the embodiment of the present invention the charging method for AC charger schematic flow sheet two.
Concrete, the described charging method for AC charger also includes:
Step S40: the working time of described current detection circuit is monitored by baseband chip, when described baseband chip detects
To described Power Management Unit work reach certain time time, described baseband chip control described universal port output control signal
Quit work with the described current detection circuit of control.This step S40, when step S20 performs, performs simultaneously, i.e. works as current detecting
When circuit starts to perform to judge the nominal current whether input current reaches AC charger, baseband chip is to described current detecting electricity
The working time on road monitors, when described baseband chip detects that the work of described current detection circuit reaches certain time, and institute
State baseband chip control described universal port output control signal to quit work to control described current detection circuit.
Wherein, described " certain time " can do different set according to device situation difference, such as, set 20s etc., this Shen
Please this is not construed as limiting.Monitored by the working time for current detection circuit, it is possible to decrease the power consumption of current detection circuit.
Further, also include:
Step S50: described Power Management Unit produces interrupt notification baseband chip, described baseband chip controls universal port
Output control signal quits work to control described current detection circuit, and the most described baseband chip arranges described power management list
The charge mode of unit is USB charge mode.This step S50 performs after step S30, i.e. when the input of described current input terminal
When electric current is less than the nominal current of AC charger, described Power Management Unit produces interrupt notification baseband chip, described base band core
Sheet controls universal port output control signal and quits work to control described current detection circuit, and the most described baseband chip is arranged
The charge mode of described Power Management Unit is USB charge mode.
Thus, can improve further under AC charger, for the charging modes of battery to be charged (battery of mobile phone), improve
The charge efficiency of battery to be charged and reliability.Additionally, quit work by controlling current detection circuit, it is possible to reduce electric current inspection
The power consumption of slowdown monitoring circuit.
To sum up, the charging method for AC charger provided by the present embodiment, it is possible to avoid using AC charger
During mobile phone is charged, often occurs mobile phone to stop suddenly charging, start again after stopping charging a period of time
Continue charging, problem the most repeatedly, and then improve the service life of battery of mobile phone.
Foregoing description is only the description to present pre-ferred embodiments, not any restriction to the scope of the invention, this
Any change that the those of ordinary skill in bright field does according to the disclosure above content, modification, belong to the protection of claims
Scope.
Claims (12)
1. the charging device for AC charger, it is characterised in that including:
Power Management Unit, described Power Management Unit includes charging port, charging close port, supply port and general end
Mouthful, wherein, described supply port is in order to be connected with a battery to be charged；
Current detection circuit, described current detection circuit is connected with described charging close port；
Current input terminal, described current input terminal is connected with described current detection circuit and charging port respectively；
Whether described current detection circuit reaches the nominal electricity of AC charger in order to the input current detecting described current input terminal
Stream, when the input current of described current input terminal is less than the nominal current of AC charger, described current detection circuit controls institute
State charging close port to enable；Under described charging close port enables, described supply port stops powering to battery to be charged；
Wherein, described charging close port is that high level enables；Also include baseband chip, when the input electricity of described current input terminal
When stream is less than the nominal current of AC charger, described Power Management Unit produces baseband chip described in interrupt notification, described base band
Described in chip controls, universal port output control signal quits work to control described current detection circuit, the most described base band core
It is USB charge mode that sheet arranges the charge mode of described Power Management Unit.
2. the charging device for AC charger as claimed in claim 1, it is characterised in that described current detection circuit passes through
Voltage corresponding to input current is made comparisons with the voltage corresponding to the nominal current of AC charger, to judge that input current is
The no nominal current reaching AC charger.
3. the charging device for AC charger as claimed in claim 2, it is characterised in that described charging detecting circuit includes
One comparator, described comparator includes first comparing input, second comparing input and compare outfan, described input current
Corresponding voltage input compares input to first, and the voltage corresponding to nominal current of described AC charger inputs to second
Relatively input, the described outfan that compares is connected with described charging close port.
4. the charging device for AC charger as claimed in claim 3, it is characterised in that described current detection circuit also wraps
Include the second resistance and the 3rd resistance；
Described first compares input and the connection of the first resistance, and described first resistance is connected with described current input terminal；
Described second compares input is connected with described second resistance, and described second resistance is connected with described current input terminal；Institute
State second to compare input and be also connected with described 3rd resistance, described 3rd resistance eutral grounding.
5. the charging device for AC charger as claimed in claim 4, it is characterised in that described first resistance, the second electricity
Resistance and the 3rd resistor satisfied following relation:
Wherein, R1、R2And R3Represent the first resistance, the second resistance and the resistance of the 3rd resistance respectively；V1Represent current input terminal institute
Corresponding magnitude of voltage；Icharger_standRepresent the nominal current value of AC charger.
6. the charging device for AC charger as claimed in claim 5, it is characterised in that when first compares input input
Voltage ratio second compare input input voltage big time, described comparator output high level；When first compares input input electricity
Pressure ratio second compare input input voltage little or equal time, described comparator output low level.
7. the charging device for AC charger as claimed in claim 4, it is characterised in that described first resistance is also with described
Charging port connects；Described first resistance is also connected with an electric capacity, described capacity earth.
8. the charging device for AC charger as according to any one of claim 1 to 7, it is characterised in that described power supply
Administrative unit also includes that universal port, described current detection circuit are also connected with described universal port, and described universal port exports
Control signal, whether the work of the described control signal described current detection circuit of control.
9. the charging device for AC charger as claimed in claim 8, it is characterised in that
When described baseband chip detects that the work of described current detection circuit reaches certain time, described baseband chip controls institute
State universal port output control signal to quit work to control described current detection circuit.
10. the charging method for AC charger, it is characterised in that including:
Current input terminal provides input current to the charging port of current detection circuit and Power Management Unit respectively；
Current detection circuit judges whether input current reaches the nominal current of AC charger；
If described input current controls Power Management Unit less than the nominal current of AC charger, the most described current detection circuit
Charging close port enables；Under described charging close port enables, described supply port stops powering to battery to be charged；
Wherein, described charging close port is that high level enables；If the input current of described current input terminal is less than AC charger
Nominal current, described Power Management Unit produce interrupt notification baseband chip, described baseband chip control universal port output
Control signal quits work to control described current detection circuit, and the most described baseband chip arranges described Power Management Unit
Charge mode is USB charge mode.
11. as claimed in claim 10 for the charging method of AC charger, it is characterised in that described current detection circuit leads to
Cross and the voltage corresponding to input current is made comparisons with the voltage corresponding to the nominal current of AC charger, to judge input current
Whether reach the nominal current of AC charger.
12. as claimed in claim 10 for the charging method of AC charger, it is characterised in that when current detection circuit starts
When performing to judge the nominal current whether input current reaches AC charger, the baseband chip work to described current detection circuit
Time monitors, when described baseband chip detects that the work of described current detection circuit reaches certain time, and described base band core
Sheet controls described universal port output control signal and quits work to control described current detection circuit.
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| CN201210378100.9A CN103715726B (en) | 2012-09-29 | 2012-09-29 | Charging device and method for AC charger |
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| CN103715726A CN103715726A (en) | 2014-04-09 |
| CN103715726B true CN103715726B (en) | 2016-12-21 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US9656570B2 (en) * | 2014-12-15 | 2017-05-23 | Ford Global Technologies, Llc | Current sensor for a vehicle |
| CN106019170B (en) * | 2016-05-18 | 2019-04-09 | Oppo广东移动通信有限公司 | A kind of power supply adaptor detection device |
| CN113162179A (en) * | 2021-04-25 | 2021-07-23 | 厦门视贝科技有限公司 | Intelligent charging timing protector |
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Application publication date: 20140409 Assignee: Shanghai Li Ke Semiconductor Technology Co., Ltd. Assignor: Leadcore Technology Co., Ltd. Contract record no.: 2018990000159 Denomination of invention: Charging apparatus and method for AC charger Granted publication date: 20161221 License type: Common License Record date: 20180615 |
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