CN106972568A - Charging detecting circuit, method and electronic equipment - Google Patents
Charging detecting circuit, method and electronic equipment Download PDFInfo
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- CN106972568A CN106972568A CN201710240617.4A CN201710240617A CN106972568A CN 106972568 A CN106972568 A CN 106972568A CN 201710240617 A CN201710240617 A CN 201710240617A CN 106972568 A CN106972568 A CN 106972568A
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- 238000007600 charging Methods 0.000 title claims abstract description 182
- 238000000034 method Methods 0.000 title claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 65
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000005611 electricity Effects 0.000 claims description 10
- 238000007689 inspection Methods 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 3
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 description 9
- 238000013501 data transformation Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 238000010277 constant-current charging Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- H02J7/0077—
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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
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00045—Authentication, i.e. circuits for checking compatibility between one component, e.g. a battery or a battery charger, and another component, e.g. a power source
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to electronic technology field, a kind of charging detecting circuit, method and electronic equipment are disclosed.Wherein, charging detecting circuit includes：Charging inlet, interconnecting module, detection resistance and the control module connected for external power supply equipment；The first input end of interconnecting module and the first data terminal of charging inlet are connected, and the first end of the first output end and detection resistance is connected；Wherein, when external power supply equipment is charging adapter, the first data terminal of charging inlet and the first end of detection resistance are turned on；The voltage detecting end of control module and the first end of detection resistance are connected, and the second end of power supply output end and detection resistance is connected；Control module is powered by output end of powering to detection resistance, and the voltage at the first end for passing through voltage detecting end acquisition detection resistance, and when voltage is more than predetermined threshold value, is charged with the first preset charged electric current that the standard charging current than electronic equipment is small.In such manner, it is possible to avoid excessively taking out non-first wife's charging adapter the situation of load.
Description
Technical field
The present invention relates to electronic technology field, more particularly to charging detecting circuit, method and electronic equipment.
Background technology
With the fast-developing of science and technology and progress, the portable electric appts such as mobile phone, tablet personal computer have turned into people and lived
In requirement.At present, on these portable electric appts, the application of function that supply user uses is more and more, causes electronics
The power consumption of equipment is increasing, and the cruising time of battery is shorter and shorter, charges more and more frequent.
In the prior art, major producers begin to use the mode of electron equipment large current charge, to shorten battery
Charge duration, and the Charging Specification from 5V/0.5A before is progressively excessively to 5V/1A, then the 5V/2A generally used till now.But
It is, inventors herein have recognized that, at least there is following defect in prior art：
At present, most of charging scheme is all based on the peak power that first wife's charging adapter can be output and filled
Electricity.Such as, first wife's charging adapter of certain electronic equipment is 5V/2A specification, and the constant-current charging phase of that electronic equipment is just
It is to be carried out based on 2A.From the point of view of circuit system angle, 2A electric current has been quite big, for the requirement of charging adapter
Also can accordingly it improve.In this case, if user is carried out using the charging adapter of 5V/1A specifications to above-mentioned electronic equipment
Charging, that is in the constant-current charging phase of electronic equipment, and charging is carried out based on 2A, it may appear that charging adapter is excessively taken out
The situation of load, so as to bring damage to the charging adapter currently charged, What is more can overheat the charging adapter, and draw
Play fire.
The content of the invention
The purpose of embodiment of the present invention is to provide a kind of charging detecting circuit, method and electronic equipment, can be external
Whether be first wife charging adapter detected, when external power supply equipment is not first wife's charging adapter if connecing power-supply device, energy
Enough less electric currents are charged, and efficiently avoid the situation that load is excessively taken out to non-first wife's charging adapter.
In order to solve the above technical problems, embodiments of the present invention provide a kind of charging detecting circuit, applied to electronics
Equipment, including：Charging inlet, interconnecting module, detection resistance and the control module connected for external power supply equipment；
The first data terminal connection of the first input end and charging inlet of interconnecting module, the first output end and detection resistance
First end is connected；Wherein, external power supply equipment be charging adapter when, interconnecting module conducting charging inlet the first data terminal with
The first end of detection resistance；
The voltage detecting end of control module and the first end of detection resistance are connected, power supply output end and the detection of control module
The second end connection of resistance；Wherein, control module is powered by output end of powering to detection resistance, and is obtained by voltage detecting end
Take the voltage at the first end of detection resistance；Control module is used for when voltage is more than predetermined threshold value, with the first preset charged electricity
Stream is charged；Wherein, the first preset charged electric current is less than the standard charging current of electronic equipment.
Embodiments of the present invention additionally provide a kind of electronic equipment, including above-mentioned charging detecting circuit.
Embodiments of the present invention additionally provide a kind of method for measuring charged, applied to above-mentioned charging detecting circuit, bag
Include：
When the external power supply equipment for detecting access is charging adapter, the electricity at the first end of detection resistance is obtained
Pressure；
If voltage is more than predetermined threshold value, charged with the first preset charged electric current；Wherein, the first preset charged electricity
Standard charging current of the stream less than electronic equipment.
Embodiment of the present invention in terms of existing technologies, by charging detecting circuit set interconnecting module and
Whether the mode of detection resistance, be that first wife's charging adapter is detected to external power-supply device, in order to be set in external power supply
It is standby when being not first wife's charging adapter, charged with less electric current, it is to avoid filled using non-first wife's charging adapter
When electric, there is the situation that load is excessively taken out to non-first wife's charging adapter.Wherein, charging detecting circuit judges to examine by control module
Whether the voltage at the first end of measuring resistance is more than the mode of predetermined threshold value, to judge whether external power supply equipment is first wife's charging
Adapter, whether be first wife charging adapter, in order to work as if can detect presently used charging adapter exactly
When charging adapter is non-first wife's charging adapter used in preceding, the protection to presently used charging adapter is realized,
Avoid charging adapter from overheating, cause the situation of fire.
In addition, control module is additionally operable to when voltage is less than or equal to predetermined threshold value, with the standard charging electricity of electronic equipment
Stream is charged.So, when the voltage at the first end of detection resistance is less than or equal to predetermined threshold value, it is believed that current institute
The charging adapter used is first wife's charging adapter, now, is charged with the standard charging current of electronic equipment, Neng Gouling
Electronic equipment is fully charged in the short period of time.
In addition, the second data terminal and the first identification end connection of control module of charging inlet；External power supply equipment is to fill
During Electric adapter, the first data terminal short circuit of charging inlet is in the second data terminal of charging inlet；External power supply equipment is data
During transmission terminal, the first identification end of charging inlet conducting external power supply equipment and control module；Second output of interconnecting module
Hold and be connected with the second identification end of control module；Wherein, when external power supply equipment is data transmission terminal, interconnecting module conducting is filled
First data terminal of electrical interface and the second identification end；Control module is additionally operable to lead with the second data terminal detecting the first identification end
It is logical, and when the second identification end and the conducting of the first data terminal, charged with the second preset charged electric current, the second preset charged electricity
Stream is less than the first preset charged electric current.In this way, charging detecting circuit can also enter to the type of external power-supply device
Row detection, when external power-supply device is data transmission terminal, is charged with smaller charging current, data is passed with realizing
The protection of defeated terminal.
In addition, the second input of interconnecting module and the second data terminal of charging inlet are connected；The 3rd of interconnecting module is defeated
Go out end to be connected with the first identification end of control module, the second identification end connection of the 4th output end and control module；Wherein, it is external
When power-supply device is data transmission terminal, the first data terminal of interconnecting module conducting charging inlet and the first identification of control module
End, and, the second data terminal of charging inlet and the second identification end of control module；Control module is additionally operable to detecting first
When recognizing end with the second identification end conducting, charged with the second preset charged electric current, the second preset charged electric current is less than
The first preset charged electric current.In this way, charging detecting circuit can also be carried out to the type of external power-supply device
Detection, when external power-supply device is data transmission terminal, is charged, to realize to data transfer with smaller charging current
The protection of terminal.
Brief description of the drawings
Fig. 1 is the circuit diagram according to charging detecting circuit in first embodiment of the invention；
Fig. 2 is that the external power supply connected according to charging detecting circuit in first embodiment of the invention charges for first wife
Circuit diagram during adapter；
Fig. 3 is the circuit diagram according to charging detecting circuit in second embodiment of the invention；
Fig. 4 is the flow chart according to method for measuring charged in four embodiment of the invention.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with each reality of the accompanying drawing to the present invention
The mode of applying is explained in detail.However, it will be understood by those skilled in the art that in each embodiment of the invention,
In order that reader more fully understands the application and proposes many ins and outs.But, even if without these ins and outs and base
Many variations and modification in following embodiment, can also realize the application technical scheme claimed.
The first embodiment of the present invention is related to a kind of charging detecting circuit, as shown in Figure 1.Charging in present embodiment
Detect that circuit is applied to electronic equipment, electronic equipment can be the portable mobile termianls such as mobile phone, tablet personal computer.Wherein, charge
Detection circuit includes：Charging inlet 1, interconnecting module 2, detection resistance R1 and the control module 3 connected for external power supply equipment.
Below in charging detecting circuit, the annexation and operation principle of each part are specifically described：
In present embodiment, the first input end a of interconnecting module 2 is connected with the first data terminal 11 of charging inlet 1, and first
Output end c is connected with detection resistance R1 first end.Wherein, when external power supply equipment is charging adapter, interconnecting module 2 is turned on
First data terminal 11 and detection resistance R1 of charging inlet 1 first end.
Specifically, charging inlet 1 can be general-purpose serial bus USB interface, and the first data terminal 11 of charging inlet 1 can
Think the data transfer DM ends of USB interface, interconnecting module 2 can switch switch for USB.So, because the data of USB interface are passed
Defeated DM ends are with data transfer DP ends when external power-supply device is charging adapter, it may occur that short circuit, therefore, the energy of interconnecting module 2
Whether enough by way of judging whether the data transfer DM ends of USB interface are shorted, it is charging to detect external power supply equipment
Adapter, so as to realize when external power-supply device is charging adapter, the first of the conducting charging inlet 1 of interconnecting module 2
Data terminal 11 and detection resistance R1 first end.
In present embodiment, the voltage detecting end B of control module 3 is connected with detection resistance R1 first end, control module 3
Power supply output terminals A be connected with detection resistance R1 the second end.Wherein, control module 3 by output terminals A of powering to detection resistance
R1 powers, and the voltage at the first end for passing through voltage detecting end B acquisition detection resistances R1.Also, in present embodiment, control
When the voltage that module 3 is used at detection resistance R1 first end is more than predetermined threshold value, filled with the first preset charged electric current
Electricity；Wherein, the first preset charged electric current is less than the standard charging current of electronic equipment.
Specifically, the standard charging current of electronic equipment and the first preset charged electric current can be pre- by technical staff
First set and be stored in control module 3.Also, the first preset charged electric current can be by mark of the technical staff according to electronic equipment
Quasi- charging current is configured, e.g., and when the standard charging current of electronic equipment is 2A, the first preset charged electric current could be arranged to
1A。
More specifically, control module 3 can include control chip and power supply, control chip and power electric connection.Its
In, the voltage detecting end B of control chip is connected with detection resistance R1 first end, power supply output terminals A and the detection of control chip
Resistance R1 the second end connection.Control chip control power supply is powered, and the fax that power supply is supplied is defeated by into power supply output terminals A, with
Realize that power supply output terminals A is powered to detection resistance R1.In present embodiment, power supply output end 13 and the control of charging inlet 1
The power supply connection of molding block 3, port E as shown in Figure 1 is the power input of control module 3, so, just can be realized
Charging of the external power supply equipment to power supply.
In present embodiment, first resistor R2, first resistor R2 mono- are pre-set in first wife's charging adapter
End is connected with the first data terminal 11 of charging inlet 1, other end ground connection, as shown in Figure 2：It is that first wife fills for external power supply equipment 4
During Electric adapter, external power supply equipment 4 and the circuit diagram of charging detecting circuit.
The voltage that detection resistance R1 is supplied with the power supply output terminals A of control module 3 is designated as U0 below, detection resistance R1's
Voltage at first end is designated as U1 mode, and the operation principle to charging detecting circuit carries out analytic explanation：
It is not difficult to find out from Fig. 2, when external power supply equipment 4 is charging adapter, interconnecting module 2 turns on charging inlet 1
During the first data terminal 11 and detection resistance R1 first end, if external power supply equipment 4 is first wife's charging adapter, will exist
First resistor R2 and detection resistance R1 partial pressures, make the voltage at detection resistance R1 first end reduce, now, detection resistance R1's
Voltage U1 at first end is：
U1=[U0/ (R2+R1)] * R1；
If external power supply equipment 4 is non-first wife's charging adapter, there would not be first resistor R2, would not also exist
Voltage at detection resistance R1 first end is due to the situation of voltage reduction caused by partial pressure, i.e. the of detection resistance R1
The voltage U1 of end does not change, now, and the voltage U1 at detection resistance R1 first end is：
U1=(U0/R1) * R1；
It is not difficult to find out, [U0/ (R2+R1)] * R1 are less than (U0/R1) * R1's, i.e. external power supply equipment 4 charges for first wife
During adapter, when the voltage at detection resistance R1 first end is less than external power supply equipment 4 for non-first wife's charging adapter, inspection
Voltage at measuring resistance R1 first end.Therefore, based on above-mentioned theory, predetermined threshold value can be set to：[U0/(R2+
R1)] * R1, so, charging detecting circuit just can judge that the voltage at detection resistance R1 first end is using control module 3
The no mode more than predetermined threshold value, to judge whether external power supply equipment 4 is first wife's charging adapter, in order in external power supply
When equipment 4 is non-first wife's charging adapter, with the defeated of the first small preset charged electric current of the standard charging current than electronic equipment
Go out electric current to be charged, realize protection to presently used charging adapter, it is relatively simple convenient to operate, and feasibility compared with
It is high.
It is noted that in present embodiment, control module 3 is additionally operable to the voltage at detection resistance R1 first end
During less than or equal to predetermined threshold value, charged with the standard charging current of electronic equipment.Specifically, when detection resistance R1's
When voltage at first end is less than or equal to predetermined threshold value, it is believed that presently used charging adapter is that first wife's charging is suitable
Orchestration, now, is charged with the standard charging current of electronic equipment, electronic equipment can be made to be full of in the short period of time
Electricity.
Because in present embodiment, charging inlet 1 is illustrated by taking USB interface as an example, because USB interface is except tool
Outside standby charge function, also with data-transformation facility, therefore, in present embodiment, to ensure that the normal of USB interface is used, also
The second data terminal 12 (that is, the data transfer DP ends of USB interface) of charging inlet 1 is made to connect with the second input b of interconnecting module 2
Connect, in order to external power-supply device be data transmission terminal (e.g., computer) when, USB interface can normal work, realize data
Transfer function.
Specifically, because charging inlet 1 is USB interface, when the first data terminal 11, the second data terminal of charging inlet 1
12 when being in conducting state, the data-transformation facility normal work of USB interface.Therefore, in present embodiment, interconnecting module 2
The 3rd output end e also be connected with the first of control module the identification end D, the 4th Ausgang is also recognized with the second of control module
Hold C connections.So, when external power-supply device is data transmission terminal, interconnecting module 2 just can turn on the of charging inlet 1
One data terminal 11 and the first identification end D of control module 3, and, the second data terminal 12 and the control module 3 of charging inlet 1
Second identification end C, to realize the data-transformation facility of charging inlet 1.
More specifically, due to external power supply equipment be data transmission terminal when, the electric current for being transferred to electronic equipment is smaller,
Therefore, in present embodiment, control module 3 is additionally operable to when detecting the identification end C conductings of the first identification end D and second, with the
Two preset charged electric currents are charged.Wherein, the second preset charged electric current can be pre-set by technical staff and be stored in control
In molding block 3, and the second preset charged electric current is less than the first preset charged electric current, to realize the protection to data transmission terminal.
Such as, in practical operation, the second preset charged electric current could be arranged to 0.5A.
Compared with prior art, in present embodiment, by setting interconnecting module 2 and detection in charging detecting circuit
Whether resistance R1 mode, be that first wife's charging adapter is detected to external power-supply device, in order in external power-supply device
When being not first wife's charging adapter, charged with less electric current, it is to avoid charged using non-first wife's charging adapter
When, there is the situation that load is excessively taken out to non-first wife's charging adapter.
Second embodiment of the present invention is related to a kind of charging detecting circuit, as shown in Figure 3.Second embodiment and first
Embodiment is roughly the same, is in place of the main distinction：In second embodiment of the invention, charging inlet 1 and control module 3
Connected mode and interconnecting module 2 to implement form different from first embodiment, so as to make charging detecting circuit exist
Operation principle when external power supply equipment is data transmission terminal is different.It is specifically described below：
In present embodiment, the first input end a of interconnecting module 2 is connected with the first data terminal 11 of charging inlet 1, and first
Output end c is connected with detection resistance R1 first end.Second data terminal 12 of charging inlet 1 and the first identification of control module 3
Hold D connections.Also, the second output end c of interconnecting module 2 is connected with the second identification end C of control module 3.
Specifically, interconnecting module 2 equivalent to one " single-pole double-throw switch (SPDT) ", when external power supply equipment is charging adapter
When, the first end of the first data terminal 11 and detection resistance R1 of the conducting charging inlet 1 of interconnecting module 2, i.e. the of interconnecting module 2
Two output end b normal works；When external power supply equipment is data transmission terminal, the first of the conducting charging inlet 1 of interconnecting module 2
Data terminal 11 and second recognizes end C, i.e. the first output end c normal works of interconnecting module 2.It is below USB with charging inlet 1
Illustrated exemplified by interface：
Specifically, when being data transmission terminal due to external power supply equipment, the of the conducting charging inlet 1 of interconnecting module 2
One data terminal 11 and the second identification end C, also, the second data terminal 12 of charging inlet 1 is to recognize end D with the first of control module
Connection, therefore, in this case, the first data terminal 11, the second data terminal 12 of charging inlet 1 are in conducting state,
The data-transformation facility normal work of USB interface.Now, control module 3 is detecting the first identification end D and the second data terminal 12
When conducting, the second identification end C and the conducting of the first data terminal 11, charged, can be realized normal with the second preset charged electric current
Data-transformation facility, and data transmission terminal can be protected.Wherein, the second preset charged electric current can be by technology people
Member pre-sets and is stored in control module 3, and the second preset charged electric current is less than the first preset charged electric current.
It is noted that each module involved in present embodiment is logic module, and in actual applications, one
Individual logic unit can be a part for a physical location or a physical location, can also be with multiple physics lists
The combination of member is realized.In addition, will not be with solving institute of the present invention in the innovative part in order to protrude the present invention, present embodiment
The technical problem relation of proposition less close unit is introduced, but this be not intended that in present embodiment be not present it is other single
Member.
Third embodiment of the invention is related to a kind of electronic equipment, including as in first embodiment or second embodiment
The mentioned charging detecting circuit arrived.
Four embodiment of the invention is related to a kind of method for measuring charged, and idiographic flow is as shown in Figure 4.In present embodiment
Method for measuring charged can be on the basis of the charging detecting circuit arrived mentioned in first embodiment or second embodiment
It is upper to be implemented, comprise the following steps that：
Step 301, when the external power supply equipment for detecting access is charging adapter, the first end of detection resistance is obtained
The voltage at place.
In present embodiment, illustrated so that the charging inlet of charging detecting circuit is USB interface as an example：When outside access
When connecing power-supply device for charging adapter, short circuit can occur for data transfer DM ends and the data transfer DP ends of USB interface, therefore,
Charging detecting circuit can detect external power supply by way of judging whether the data transfer DM ends of USB interface are shorted
Whether equipment is charging adapter, the voltage at first end in order to obtain detection resistance.
Specifically, the control module of charging detecting circuit can include control chip and power supply, control chip and electricity
Source is electrically connected.Wherein, the first end connection of the voltage detecting end of control chip and detection resistance, the power supply output end of control chip
It is connected with the second end of detection resistance.In practical operation, control chip control power supply is powered, and the fax that power supply is supplied is defeated by
Power supply output end, to realize that power supply output end is powered to detection resistance.Meanwhile, control chip is by voltage detecting end to inspection
Voltage at the first end of measuring resistance is detected, obtains the voltage at the first end of detection resistance.
Step 302, judge whether voltage is more than predetermined threshold value.If so, then performing step 303, step 304 is otherwise performed.
Specifically, predetermined threshold value can be pre-set by technical staff and be stored in the control module of charging detecting circuit
In.Such as, when predetermined threshold value can use first wife's charging adapter for electronic equipment, the magnitude of voltage at the first end of detection resistance.
Step 303, charged with the first preset charged electric current.
Specifically, the first preset charged electric current is less than the standard charging current of electronic equipment.Wherein, the mark of electronic equipment
Quasi- charging current and the first preset charged electric current can be pre-set by technical staff and be stored in charging detecting circuit
In control module.Also, the first preset charged electric current can be carried out by technical staff according to the standard charging current of electronic equipment
Set, e.g., when the standard charging current of electronic equipment is 2A, the first preset charged electric current could be arranged to 1A.
Step 304, charged with the standard charging current of electronic equipment.
It is seen that, it is right by way of the voltage at the first end to detection resistance judges in present embodiment
Whether external power supply equipment is that first wife's charging adapter is detected, in order to external power-supply device be first wife's adaptive charging
During device, charged with less electric current, it is to avoid when being charged using non-first wife's charging adapter, appearance is filled to non-first wife
Electric adapter excessively takes out the situation of load.
It is noted that in present embodiment, being that further external electronic equipment is protected, being connect detecting
The external power supply equipment entered is after charging adapter, elder generation is charged with the first preset charged electric current.
Specifically, when external power supply equipment has just been accessed in charging detecting circuit, charging detecting circuit is judging external
It is to need certain detection duration when whether power-supply device is first wife's charging adapter.Now, if external power supply equipment is
Non- first wife's charging adapter, is charged with the standard charging current of electronic equipment, will also result in equipment damage.Therefore, this reality
Apply in mode, after the external power supply equipment of access is detected for charging adapter, charged with the first preset charged electric current,
The protection to external electronic equipment can be realized.
The step of various methods are divided above, be intended merely to description it is clear, can be merged into when realizing a step or
Some steps are split, multiple steps are decomposed into, as long as including identical logical relation, all protection domain in this patent
It is interior；To adding inessential modification in algorithm or in flow or introducing inessential design, but its algorithm is not changed
Core design with flow is all in the protection domain of the patent.
It will be appreciated by those skilled in the art that realizing that all or part of step in above-described embodiment method can be by
Program instructs the hardware of correlation to complete, and the program storage is in a storage medium, including some instructions are to cause one
Individual equipment (can be single-chip microcomputer, chip etc.) or processor (processor) perform each embodiment methods described of the application
All or part of step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic disc or CD etc. are various can store journey
The medium of sequence code.
It will be understood by those skilled in the art that the respective embodiments described above are to realize the specific embodiment of the present invention,
And in actual applications, can to it, various changes can be made in the form and details, without departing from the spirit and scope of the present invention.
Claims (10)
1. a kind of charging detecting circuit, it is characterised in that applied to electronic equipment, including：For filling that external power supply equipment is connected
Electrical interface, interconnecting module, detection resistance and control module；
The first input end of the interconnecting module is connected with the first data terminal of the charging inlet, the first output end and the inspection
The first end connection of measuring resistance；Wherein, when the external power supply equipment is charging adapter, filled described in the interconnecting module conducting
First data terminal of electrical interface and the first end of the detection resistance；
The voltage detecting end of the control module is connected with the first end of the detection resistance, the power supply output of the control module
End is connected with the second end of the detection resistance；Wherein, the control module is electric to the detection by the power supply output end
Voltage at resistance power supply, and the first end for passing through the voltage detecting end acquisition detection resistance；The control module is used for
When the voltage is more than predetermined threshold value, charged with the first preset charged electric current；Wherein, the first preset charged electric current
Less than the standard charging current of the electronic equipment.
2. charging detecting circuit according to claim 1, it is characterised in that the control module is additionally operable in the voltage
During less than or equal to the predetermined threshold value, charged with the standard charging current of the electronic equipment.
3. charging detecting circuit according to claim 1, it is characterised in that
Second data terminal of the charging inlet is connected with the first identification end of the control module；The external power supply equipment is
During charging adapter, the first data terminal short circuit of the charging inlet is in the second data terminal of the charging inlet；It is described external
When power-supply device is data transmission terminal, the charging inlet turns on the first of the external power supply equipment and the control module
Recognize end；
Second output end of the interconnecting module is connected with the second identification end of the control module；Wherein, the external power supply
When equipment is data transmission terminal, the interconnecting module turns on the first data terminal and the described second identification of the charging inlet
End；
The control module is additionally operable to detecting the first identification end and second data terminal conducting, and described second
When recognizing that end is turned on first data terminal, charged with the second preset charged electric current, the second preset charged electric current
Less than the first preset charged electric current.
4. charging detecting circuit according to claim 1, it is characterised in that
Second input of the interconnecting module is connected with the second data terminal of the charging inlet；
3rd output end of the interconnecting module is connected with the first identification end of the control module, the 4th output end and the control
Second identification end connection of molding block；Wherein, when the external power supply equipment is data transmission terminal, the interconnecting module conducting
First data terminal of the charging inlet and the first identification end of the control module, and, the second number of the charging inlet
According to end and the second identification end of the control module；
The control module is additionally operable to when detecting the first identification end with the described second identification end conducting, default with second
Charging current is charged, and the second preset charged electric current is less than the first preset charged electric current.
5. charging detecting circuit according to claim 1, it is characterised in that the charging inlet is USB
USB interface.
6. charging detecting circuit according to claim 5, it is characterised in that the interconnecting module is that USB switches switch.
7. a kind of electronic equipment, it is characterised in that including the charging detecting circuit as any one of claim 1 to 6.
8. a kind of method for measuring charged, it is characterised in that applied to the charging detection as any one of claim 1 to 6
Circuit, methods described includes：
When the external power supply equipment for detecting access is charging adapter, the electricity at the first end of the detection resistance is obtained
Pressure；
If the voltage is more than predetermined threshold value, charged with the first preset charged electric current；Wherein, described first default fills
Electric current is less than the standard charging current of the electronic equipment.
9. method for measuring charged according to claim 8, it is characterised in that also include：
If the voltage is less than or equal to the predetermined threshold value, charged with the standard charging current of electronic equipment.
10. method for measuring charged according to claim 9, it is characterised in that the external power supply for detecting access is set
It is standby be charging adapter after, in addition to：
Charged with the first preset charged electric current.
Priority Applications (1)
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| CN108321900A (en) * | 2018-03-02 | 2018-07-24 | 西安易朴通讯技术有限公司 | The charge control method and terminal of terminal |
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