CN109599920A - Charge path control circuit, mobile terminal and charging system - Google Patents
Charge path control circuit, mobile terminal and charging system Download PDFInfo
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- CN109599920A CN109599920A CN201910052004.7A CN201910052004A CN109599920A CN 109599920 A CN109599920 A CN 109599920A CN 201910052004 A CN201910052004 A CN 201910052004A CN 109599920 A CN109599920 A CN 109599920A
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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
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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
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
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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
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- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of charge path control circuit, including the first input unit, the second input unit, first control circuit, second control circuit and output unit, first input unit connects the first control circuit, second input unit connects the second control circuit, and the first control circuit and the second control circuit are all connected with the output unit；The first control circuit includes the first detection pin and the first control pin, and the second control circuit includes the second detection pin and the second control pin；When detecting that the voltage at the first detection pin and the second detection pin is all satisfied charge requirement, the disconnection that the voltage at the first control pin is controlled to realize the voltage at the disconnection of the first control circuit, or control the second control pin to realize the second control circuit.The present invention also provides a kind of mobile terminal and charging systems.
Description
[technical field]
The present invention relates to technical field of mobile terminals more particularly to a kind of charge path control circuit, mobile terminal and fill
Electric system.
[background technique]
With the progress of science and technology, all kinds of mobile terminals have become people and live indispensable a part.However,
Make the battery capacity in mobile terminal smaller due to numerous functions of mobile terminal and to beautiful, frivolous, portable requirement,
The cruising ability of mobile terminal is poor, needs often to charge to mobile terminal, when two or more charging unit (example
Such as seat charger or USB charger) simultaneously when connecting mobile terminal, due to the conflict of charge path, can to circuit element, move
Dynamic terminal and charging unit cause irrecoverable damage, and charging security is poor.
In consideration of it, it is really necessary to provide a kind of novel charge path control circuit, mobile terminal and charging system with gram
Take drawbacks described above.
[summary of the invention]
The object of the present invention is to provide one kind can be avoided charge path conflict, avoids circuit element, mobile terminal and fills
Charge path control circuit, mobile terminal and the charging system that electric installation causes damage, charging security high.
To achieve the goals above, the present invention provides a kind of charge path control circuit, including the first input unit, second
Input unit, first control circuit, second control circuit and output unit, the first input unit connection first control
Circuit, second input unit connect the second control circuit, the first control circuit and the second control circuit
It is all connected with the output unit；The first control circuit includes the first detection pin and the first control pin, second control
Circuit processed includes the second detection pin and the second control pin；When detect it is described first detection pin and it is described second detection draw
When voltage at foot is all satisfied charge requirement, the voltage at the first control pin is controlled to realize the first control circuit
Disconnection, or voltage at control the second control pin is to realize the disconnection of the second control circuit.
In a preferred embodiment, first input unit includes the first input positive terminal and the first input cathode
It holds, second input unit includes the second input positive terminal and the second input negative pole end, the output unit include exporting just
Extreme and output negative pole end；The first control circuit includes concatenated first resistor and second resistance, the first resistor
One end connection the first input positive terminal, one end connection the first input negative pole end of the second resistance, the first resistor
And the first detection pin is drawn between second resistance；The first control circuit further includes 3rd resistor, the first metal-oxide-semiconductor and first
Triode, one end of the 3rd resistor connect the end D of the first input positive terminal and first metal-oxide-semiconductor, the third
The other end of resistance connects the end G of first metal-oxide-semiconductor and the end c of first triode, and the end S of first metal-oxide-semiconductor connects
Meet the output cathode end, the end the e connection first input negative pole end of first triode and the output negative pole end, institute
Draw the first control pin in the end b for stating the first triode；The second control circuit includes concatenated 4th resistance and the 5th electricity
Resistance, one end connection of the 4th resistance the second input positive terminal, one end connection described second of the 5th resistance are defeated
Enter negative pole end, the second detection pin is drawn between the 4th resistance and the 5th resistance；The second control circuit also wraps
Include the 6th resistance, the second metal-oxide-semiconductor and the second triode, one end connection of the 6th resistance second input positive terminal and institute
State the end D of the second metal-oxide-semiconductor, the other end of the 6th resistance connect second metal-oxide-semiconductor the end G and second triode
The end c, the end S of second metal-oxide-semiconductor connect the output cathode end, the end the e connection of second triode second input
The second control pin is drawn at negative pole end and the output negative pole end, the end b of second triode.
It in a preferred embodiment, further include protection circuit, it is single that the protection circuit is set to first input
It is first between the first control circuit；The protection circuit includes protection device, and the positive terminal of the protection device connects institute
State the first input negative pole end, the negative pole end connection of the protection device the first input positive terminal.
In a preferred embodiment, the protection circuit further include the 7th resistance, the 8th resistance, third transistor,
9th resistance, third metal-oxide-semiconductor and the 4th triode；7th resistance is connected with the 8th resistance and the 7th resistance
One end connection the first input positive terminal, one end connection of the 8th resistance the first input negative pole end；The third
The end b of triode connects between the 7th resistance and the 8th resistance, one end connection described first of the 9th resistance
Positive terminal is inputted, the other end of the 9th resistance connects the end c of the third transistor, and the end e of the third transistor connects
Connect the first input negative pole end；The end b of 4th triode connects the end c of the third transistor, the four or three pole
The end c of pipe connects the end G of the third metal-oxide-semiconductor, the end the D connection of the third metal-oxide-semiconductor the first input positive terminal, and described the
The end S of three metal-oxide-semiconductors connects the first resistor, the end the e connection of the 4th triode the first input negative pole end.
In a preferred embodiment, the protection device is diode, and the reverse turn-on voltages of the diode are big
Two times of voltage difference, the forward conduction of the diode between the first input positive terminal and the first input negative pole end
Electric current is greater than two times of the electric current between the first input positive terminal and the second input negative pole end.
In a preferred embodiment, first triode and the second triode are NPN type triode, and described
One metal-oxide-semiconductor and the second metal-oxide-semiconductor are p-type metal-oxide-semiconductor；The third transistor and the 4th triode are NPN type triode, described
Third metal-oxide-semiconductor is p-type metal-oxide-semiconductor.
The present invention also provides a kind of mobile terminals, including CPU module, the first charging port, the second charging port, battery mould
Block and above-mentioned charge path control circuit；The CPU module includes the first detection pin, the second detection pin and control pipe
Foot, the first detection pin connection the first detection pin, the second detection pin connection the second detection pin,
The control pin connection first control pin or the second control pin；First charging port connection described the
One input unit, second charging port connect second input unit, and the output unit connects the battery module.
The present invention also provides a kind of charging systems, including the first charging unit, the second charging unit and above-mentioned mobile end
End；First charging unit connects first charging port, and first charging unit passes through first charging end
Mouth, first input unit, the first control circuit and the output unit are battery module charging；Described second
Charging unit connects second charging port, and second charging unit passes through second charging port, described second
Input unit, the second control circuit and the output unit are battery module charging.
In a preferred embodiment, first charging unit and second charging unit be seat charger or
One of USB charger, it is corresponding, first charging port and second charging port be seat fill charging port or
One of USB charging port.
In a preferred embodiment, the first input positive terminal and the first input negative pole end are that the seat fills
The vdd terminal of charger and the end GND, the second input positive terminal and the second input negative pole end are the vdd terminal of USB charger
And the end GND.
Compared with the prior art, charge path control circuit, mobile terminal and charging system provided by the invention, when first
Voltage at detection pin and the second detection pin is when meeting charge requirement, by the voltage at control the first control pin with
Realize the disconnection of first control circuit or by the voltage at control the second control pin to realize that second control circuit disconnects,
To guarantee that only charging circuit is connected all the way, that is, prevents the first charge path and the second charge path while being connected to output list
Member can be avoided charge path conflict, avoids circuit element, mobile terminal and charging unit and causes to damage, charging security
It is high.
For enable invention above objects, features, and advantages be clearer and more comprehensible, present pre-ferred embodiments are cited below particularly, and
Cooperate appended attached drawing, is described in detail below.
[Detailed description of the invention]
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the functional block diagram of charge path control circuit provided by the invention；
Fig. 2 is the circuit diagram of charge path control circuit provided by the invention；
Fig. 3 is the functional block diagram of mobile terminal provided by the invention；
Fig. 4 is the functional block diagram of charging system provided by the invention.
[specific embodiment]
Below in conjunction with attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Usually exist
The component of the embodiment of the present invention described and illustrated in attached drawing can be arranged and be designed with a variety of different configurations herein.Cause
This, is not intended to limit claimed invention to the detailed description of the embodiment of the present invention provided in the accompanying drawings below
Range, but it is merely representative of selected embodiment of the invention.Based on the embodiment of the present invention, those skilled in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Referring to Fig. 1, Fig. 1 is the functional block diagram of charge path selection circuit 100 provided by the invention；It is provided by the invention
Charge path control circuit 100, including the control of the first input unit 10, the second input unit 20, first control circuit 30, second
Circuit 40 and output unit 50, the first input unit 10 connect first control circuit 30, the second control of the second input unit 20 connection
Circuit 40 processed, first control circuit 30 and second control circuit 40 are all connected with output unit 50；First control circuit 30 includes the
One detection pin J1 and the first control pin K1, second control circuit 40 include the second detection pin J2 and the second control pin
K2；
When the voltage for detecting the place the detection pin J2 of the first detection pin J1 and second is all satisfied charge requirement, the is controlled
Voltage at one control pin K1 is to realize the disconnection of first control circuit 30, or controls the voltage at the second control pin K2
To realize the disconnection of second control circuit 40.
Charge path control circuit 100 provided by the invention, the first input unit 10 and first control circuit 30 constitute the
One charge path, the second input unit 20 and second control circuit 40 constitute the second charge path, when the first input unit 10 and
When second input unit 20 accesses voltage simultaneously, detection the first detection pin J1 and second detects the voltage at pin J2, if the
When voltage at one detection pin J1 and the second detection pin J2 meets charge requirement, it can control at the first control pin K1
Voltage to realize the disconnection of first control circuit 30, at this point, first control circuit 30 is not connected to output unit 50, and second is defeated
Enter unit 20, the connection output unit 50 of second control circuit 40, that is, realizes when the first charge path and the second charge path are same
When access and when being all satisfied charge requirement, then control and disconnect the first charge path, charged using the second charge path；Or control
Voltage at second control pin K2 to realize the disconnection of second control circuit 40, at this point, second control circuit 40 be not connected to it is defeated
Unit 50 out, and the first input unit 10, first control circuit 30 are connected to output unit 50, that is, realize when the first charge path
And second charge path simultaneously when accessing and being all satisfied charge requirement, then it controls and disconnects the second charge path, using the first charging
Path charging.
To sum up, when the voltage at the first detection pin J1 and the second detection pin J2 meets charge requirement, pass through control
Voltage at the first control of system pin K1 is to realize the disconnection of first control circuit 30, or passes through the second control of control pin K2
The voltage at place is to realize the disconnection of second control circuit 40, it is therefore prevented that the first charge path and the second charge path are connected to defeated simultaneously
Unit 50 out, that is, prevent the first charge path and the second charge path and meanwhile be mobile terminal charging and caused by a plurality of charging
The conflict in path avoids the damage of charging unit and mobile terminal caused by due to charge path conflict, improves charging peace
Quan Xing.
Referring to Figure 2 together, the first input unit 10 includes the first input positive terminal in1+ and the first input negative pole end
In1-, the second input unit 20 includes the second input positive terminal in2+ and the second input negative pole end in2-, output unit 50 include
Output cathode end OUT+ and output negative pole end OUT-.
First control circuit 30 includes concatenated first resistor R1 and second resistance R2, one end connection the of first resistor R1
One end connection the first input negative pole end in1-, first resistor R1 and second resistance of one input positive terminal in1+, second resistance R2
The first detection pin J1 is drawn between R2；
First control circuit 30 further includes 3rd resistor R3, the first metal-oxide-semiconductor M1 and the first triode Q1,3rd resistor R3's
The end D (drain electrode end) of the first input of one end connection positive terminal in1+ and the first metal-oxide-semiconductor M1, the other end connection the of 3rd resistor R3
The end G (gate terminal) of one metal-oxide-semiconductor M1 and the end c (collector terminal) of the first triode Q1, the end S (source terminal) of the first metal-oxide-semiconductor M1
Output cathode end in1+ is connected, the first input negative pole end in1- of the end e (emitter terminal) connection of the first triode Q1 and output are negative
Draw the first control pin K1 in the end b (base terminal) of extreme OUT-, the first triode Q1.
Second control circuit 40 includes concatenated 4th resistance R4 and the 5th resistance R5, one end connection the of the 4th resistance R4
One end connection the second input negative pole end in2-, the 4th resistance R4 of two input positive terminal in2+, the 5th resistance R5 and the 5th resistance
The second detection pin J2 is drawn between R5；Second control circuit 40 further includes the 6th resistance R6, the second metal-oxide-semiconductor M2 and the two or three pole
The end D of the second input of one end connection positive terminal in2+ and the second metal-oxide-semiconductor M2 of pipe Q2, the 6th resistance R6, the 6th resistance R6's is another
One end connects the end G of the second metal-oxide-semiconductor M2 and the end c of the second triode Q2, and the end S of the second metal-oxide-semiconductor M2 connects output cathode end OUT
+, the end e connection the second input negative pole end in2- and output negative pole end OUT- of the second triode Q2, the end b of the second triode Q2 is drawn
Second control pin K2 out.
Specifically, the first triode Q1 and the second triode Q2 are NPN type triode, the first metal-oxide-semiconductor M1 and the 2nd MOS
Pipe M2 is p-type metal-oxide-semiconductor.
It in present embodiment, is preset in charge path selection circuit 100 and meets the voltage threshold of charge requirement, when first defeated
When entering unit 10 and the second input unit 20 while accessing voltage, detection the first detection pin J1 and second is detected at pin J2
Voltage, if the voltage at the first detection pin J1 and the second detection pin J2 is above the voltage threshold, i.e., the first input
When the voltage of unit 10 and the second input unit 20 meets charge requirement, voltage at the first control pin K1 can control simultaneously
First being controlled the voltage at pin K1 and is set to the end the b cut-in voltage lower than the first triode Q1, i.e. the first triode Q1 is turned off,
The first metal-oxide-semiconductor M1 is turned off immediately, i.e., first control circuit 30 disconnects, and the first input unit 10 will not access output unit 50；And
In second control circuit 40, the voltage at the second detection pin J2 sets the end the b cut-in voltage higher than the second triode Q2, i.e., and second
Triode Q2 is opened, and the second metal-oxide-semiconductor M2 is opened immediately, and the second input unit 20 accesses output unit 50, that is, selects the second input
The second charge path where unit 20 charges；Or control second controls the voltage at pin K2 and draws the second control
Voltage at foot K2 is set to the end the b cut-in voltage lower than the second triode Q2, i.e. the second triode Q2 is turned off, immediately the 2nd MOS
Pipe M2 shutdown, i.e. second control circuit 40 disconnect, and the second input unit 20 will not access output unit 50；And first control circuit
In 30, the voltage at the first control pin K1 is higher than the end the b cut-in voltage of the first triode Q1, and the first triode Q1 is opened, with
That is the first metal-oxide-semiconductor M1 is opened, and the first input unit 10 accesses output unit 50, that is, selects first where the first input unit 10
Charge path charges.
To sum up, when the voltage at the first detection pin J1 and the second detection pin J2 meets charge requirement, pass through control
Voltage at the first control of system pin K1 is to realize the disconnection of first control circuit 30, or passes through the second control of control pin K2
The voltage at place is to realize the disconnection of second control circuit 40, it is therefore prevented that the first charge path and the second charge path are connected to defeated simultaneously
Unit 50 out, that is, prevent the first charge path and the second charge path and meanwhile be mobile terminal charging and caused by a plurality of charging
The conflict in path avoids the damage of charging unit and mobile terminal caused by due to charge path conflict, improves charging peace
Quan Xing.
The voltage that the voltage of J1 is higher than at the voltage threshold and the second detection pin J2 at the first detection pin is lower than
When the voltage threshold, i.e. the voltage of the first input unit 10 meets charge requirement and the voltage of the second input unit 20 is unsatisfactory for
When charge requirement, in second control circuit 40, b end of the voltage lower than the second triode Q2 at the second control pin K2 is opened
The shutdown of voltage, i.e. the second triode Q2, the second metal-oxide-semiconductor M2 is turned off immediately, and the second input unit 20 will not access output unit 50；
And in first control circuit 30, first control pin K1 place voltage higher than the first triode Q1 the end b cut-in voltage, the one or three
Pole pipe Q1 is opened, and the first metal-oxide-semiconductor M1 is opened immediately, and the first input unit 10 accesses output unit 50, that is, selects the first input single
The first charge path where member 10 charges.
Similarly, the voltage at the first detection pin J1 is lower than the voltage at the voltage threshold and the second detection pin J2
When higher than the voltage threshold, i.e. the first input unit 10 is unsatisfactory for charge requirement and the voltage satisfaction of the second input unit 20 is filled
When electricity demanding, the first input unit 10 will not access output unit 50, and the second input unit 20 accesses output unit 50, that is, selects
The second charge path where second input unit 20 charges.
It should be noted that preset voltage threshold can be adjusted according to the difference of charge type, and pass through first
Control circuit 30 and second control circuit 40 can obtain following formula:
UJ1=U1/(r1+r2)*r2(1)；
UJ2=U2/(r4+r5)*r5(2)；
Wherein, UJ1For the voltage at the first detection pin J1, U1For the first input positive terminal in1+ and the first input cathode
Hold the voltage difference of in1-, r1For the resistance value of first resistor R1, r2For the resistance value of second resistance R2；UJ2At the second detection pin J2
Voltage, U2For the voltage difference of the second input positive terminal in2+ and the second input negative pole end in2-, r1For the resistance of the 4th resistance R4
Value, r5For the resistance value of the 5th resistance R5.By adjusting the electricity of first resistor R1 and second it can be seen from formula (1) and formula (2)
The resistance value for hindering R2, can adjust the voltage at the first detection pin J1, by adjusting the resistance of the 4th resistance R4 and the 5th resistance R5
Value, can adjust the voltage at the second detection pin J2.
In present embodiment, charge path control circuit 100 further includes protection circuit 60, and protection location 60 is set to first
Between input unit 10 and first control circuit 20；Protecting circuit 60 includes protection device D1, and the positive terminal of protection device D1 connects
Meet the first input negative pole end in1-, the first input of negative pole end connection positive terminal in1+ of protection device D1.Specifically, protection device
Such as can be diode, as the first input positive terminal in1+ and the first input negative pole end in1- reversed, utilize protection device
Unilateral conduction, protect first control circuit 30 in circuit element；In order to preferably protect first control circuit 30, two poles
The reverse turn-on voltages of pipe need to be greater than two times of pressure difference between the first input positive terminal in1+ and the first input negative pole end in1-, two
The forward conduction electric current of pole pipe need to be greater than two times of the first input positive terminal in1+ and the second input negative pole end in1- electric current.
Protecting circuit 60 further includes the 7th resistance R7, the 8th resistance R8, third transistor Q3, the 9th resistance R9, the 3rd MOS
Pipe M3 and the 4th triode Q4；7th resistance R7 connects with the 8th resistance R8 and one end of the 7th resistance R7 is connecting the first input just
The first input of one end connection negative pole end in1- of extreme in1+, the 8th resistance R8；The end b of third transistor Q3 connects the 7th resistance
Between R7 and the 8th resistance R8, one end connection the first input positive terminal in1+ of the 9th resistance R9, the other end of the 9th resistance R9
Connect the end c of third transistor Q3, the first input of the end e connection negative pole end in1- of third transistor Q3；The b of 4th triode Q4
The end c of end connection third transistor Q3, the end G of the end the c connection third metal-oxide-semiconductor M3 of the 4th triode Q4, the D of third metal-oxide-semiconductor M3
The end S of end connection the first input positive terminal in1+, third metal-oxide-semiconductor M3 connects first resistor R1, the end e of the 4th triode Q4
The first input of connection negative pole end in1-.
It protects in circuit 60, when the voltage of the first input positive terminal in1+ and the first input negative pole end in1- are excessive, the
The voltage at the end b of three triode Q3 can be opened than or equal to the cut-in voltage of third transistor Q3, i.e. third transistor Q3, this
When the 4th triode Q4 the voltage at the end b be lower than the cut-in voltage of the 4th triode Q4, the 4th triode Q4 shutdown, immediately third
Metal-oxide-semiconductor M3 is also switched off, i.e., the first input unit 10 will not connect first control circuit 30, it is therefore prevented that in first control circuit 30
Circuit element pressurization it is excessive, avoid circuit element and burn.Wherein, the 7th resistance R7, the 8th resistance R8 and the 9th resistance R9
Play the role of adjusting voltage.
In other embodiments, protection electricity also can be set between the second input unit 20 and second control circuit 40
Road, for protecting second control circuit when the voltage of the second input positive terminal in2+ and the second input negative pole end in2- are excessive
Circuit element in 40 is not burned out.
Specifically, third transistor Q3 and the 4th triode Q4 are NPN type triode, third metal-oxide-semiconductor M3 is p-type MOS
Pipe.
Also referring to Fig. 3, the present invention also provides a kind of mobile terminals 200, including CPU module 201, the first charging port
202, the second charging port 203, battery module 204 and above-mentioned charge path control circuit 100；CPU module 201 includes first
It detecting pin 205, second and detects pin 206 and control pin 207, the first detection pin 205 connects the first detection pin J1, the
Two connection of detection pin 206 second detection pin J2, the first control pin K1 of control pin 207 connection or the second control pin
K2；First charging port 202 connects first input unit 10, and the second charging port 203 connects the second input unit 20, defeated
Unit 50 connects battery module 204 out.Specifically, mobile terminal 200 for example can be the intercom with two charging ports
Or three proofings machine.
Referring to Figure 4 together, it the present invention also provides a kind of charging system 300, including the first charging unit 301, second fills
Electric installation 302 and above-mentioned mobile terminal 200；First charging unit 301 connects the first charging port 202, and the first charging dress
It is battery module that 301, which are set, by the first charging port 202, the first input unit 10, first control circuit 30 and output unit 50
204 chargings；Second charging unit 302 connects the second charging port 203, and the second charging unit 302 passes through the second charging port
203, the second input unit 20, second control circuit 40 and output unit 50 are the charging of battery module 204.
In present embodiment, the first charging unit 301 and the second charging unit 302 are seat charger or USB charger
One of, corresponding, the first charging port 202 and the second charging port 203 are that seat fills in charging port or USB charging port
One kind.Also, the first input positive terminal in1+ and the first input negative pole end in1- are vdd terminal and the end GND of seat charger,
Second input positive terminal in2+ and the second input negative pole end in2- is vdd terminal and the end GND of USB charger.
First detection pin 205 of mobile terminal 200 and charging system 300 provided by the invention, CPU module 201 connects
First detection pin J1, second detection pin 206 connection the second detection pin J2, if the first control of connection of control pin 207 is drawn
Foot J1, then when the voltage at the first detection pin J1 and the second detection pin J2 is above the voltage threshold, CPU module
The voltage that first controls at pin K1 is set to the end the b cut-in voltage lower than the first triode Q1 by 201, so that the first input unit
10 will not access output unit 50, and the second input unit 20 accesses output unit 50, i.e. second input of the selection of mobile terminal 200
The second charge path where unit 20 is the charging of battery module 204；If controlling the connection of pin 207 second control pin J2,
When voltage at the first detection pin J1 and the second detection pin J2 is above the voltage threshold, CPU module 201 is by second
Voltage at control pin K2 is set to the end the b cut-in voltage lower than the second triode Q2, so that the second input unit 20 will not connect
Enter output unit 50, and the first input unit 10 accesses output unit 50, i.e. mobile terminal 200 selects 10 institute of the first input unit
The first charge path be battery module 204 charge.
To sum up, mobile terminal 200 and charging system 300 provided by the invention, when the first detection pin J1 and the second detection
When voltage at pin J2 meets charge requirement, by the voltage at the first control of control pin K1 to realize the first control electricity
The disconnection on road 30, or the voltage at pin K2 is controlled to realize the disconnection of second control circuit 40 by control second, it prevents
First charge path and the second charge path are connected to output unit 50 simultaneously, that is, prevent first charge path and second charge
Path simultaneously be mobile terminal charging and caused by a plurality of charge path conflict, caused by avoiding due to charge path conflict
The damage of charging unit and mobile terminal 200, improves charging security.
Charge path control circuit 100, mobile terminal 200 and charging system 300 provided by the invention, can be avoided charging
Path conflict avoids circuit element, mobile terminal and charging unit and causes to damage, and charging security is high.
Mode the above is only the implementation of the present invention is not intended to limit the scope of the invention, all to utilize this
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of charge path control circuit, which is characterized in that including the first input unit, the second input unit, the first control
Circuit, second control circuit and output unit, first input unit connect the first control circuit, second input
Unit connects the second control circuit, and it is single that the first control circuit and the second control circuit are all connected with the output
Member；The first control circuit includes the first detection pin and the first control pin, and the second control circuit includes the second inspection
Survey pin and the second control pin；
When detecting that the voltage at the first detection pin and the second detection pin is all satisfied charge requirement, institute is controlled
The voltage at the first control pin is stated to realize at the disconnection of the first control circuit, or control the second control pin
Voltage to realize the disconnection of the second control circuit.
2. charge path control circuit as described in claim 1, which is characterized in that first input unit includes first defeated
Entering positive terminal and the first input negative pole end, second input unit includes that the second input positive terminal and second input negative pole end,
The output unit includes output cathode end and output negative pole end；
The first control circuit includes concatenated first resistor and second resistance, one end connection of the first resistor described the
One input positive terminal, one end connection of the second resistance the first input negative pole end, the first resistor and second resistance
Between draw first detection pin；The first control circuit further includes 3rd resistor, the first metal-oxide-semiconductor and the first triode, institute
State 3rd resistor one end connect it is described first input positive terminal and first metal-oxide-semiconductor the end D, the 3rd resistor it is another
End connects the end G of first metal-oxide-semiconductor and the end c of first triode, and the end S of first metal-oxide-semiconductor connects the output
Positive terminal, the end the e connection first input negative pole end of first triode and the output negative pole end, the one or three pole
Draw the first control pin in the end b of pipe；
The second control circuit includes concatenated 4th resistance and the 5th resistance, one end connection of the 4th resistance described the
Two input positive terminals, one end connection of the 5th resistance the second input negative pole end, the 4th resistance and the described 5th
The second detection pin is drawn between resistance；The second control circuit further includes the 6th resistance, the second metal-oxide-semiconductor and the two or three pole
Pipe, one end of the 6th resistance connect the end D of the second input positive terminal and second metal-oxide-semiconductor, the 6th resistance
The other end connect the end G of second metal-oxide-semiconductor and the end c of second triode, the end S of second metal-oxide-semiconductor connects institute
State output cathode end, the end the e connection second input negative pole end of second triode and the output negative pole end, described the
Draw the second control pin in the end b of two triodes.
3. charge path control circuit as claimed in claim 2, which is characterized in that it further include protection circuit, the protection electricity
Road is set between first input unit and the first control circuit；The protection circuit includes protection device, described
The positive terminal connection of device the first input negative pole end is protected, the negative pole end connection of the protection device first input is just
Extremely.
4. charge path control circuit as claimed in claim 3, which is characterized in that the protection circuit further includes the 7th electricity
Resistance, the 8th resistance, third transistor, the 9th resistance, third metal-oxide-semiconductor and the 4th triode；7th resistance and the described 8th
Resistance is connected and one end of the 7th resistance connection the first input positive terminal, described in one end connection of the 8th resistance
First input negative pole end；The end b of the third transistor connects between the 7th resistance and the 8th resistance, and the described 9th
One end connection of resistance the first input positive terminal, the other end of the 9th resistance connect the end c of the third transistor,
The end the e connection of the third transistor the first input negative pole end；The end b of 4th triode connects the three or three pole
The end c of pipe, the end c of the 4th triode connect the end G of the third metal-oxide-semiconductor, described in the end the D connection of the third metal-oxide-semiconductor
First input positive terminal, the end S of the third metal-oxide-semiconductor connect the first resistor, described in the end the e connection of the 4th triode
First input negative pole end.
5. charge path control circuit as claimed in claim 4, which is characterized in that the protection device is diode, described
The reverse turn-on voltages of diode are greater than two of voltage difference between the first input positive terminal and the first input negative pole end
Times, the forward conduction electric current of the diode is greater than the electricity between the first input positive terminal and the second input negative pole end
Two times of stream.
6. charge path control circuit as claimed in claim 5, which is characterized in that first triode and the second triode
It is NPN type triode, first metal-oxide-semiconductor and the second metal-oxide-semiconductor are p-type metal-oxide-semiconductor；The third transistor and the four or three pole
Pipe is NPN type triode, and the third metal-oxide-semiconductor is p-type metal-oxide-semiconductor.
7. a kind of mobile terminal, which is characterized in that including CPU module, the first charging port, the second charging port, battery module
And charge path control circuit as claimed in any one of claims 1 to 6；The CPU module includes the first detection pin, the
Two detection pins and control pin, the first detection pin connection the first detection pin, the second detection pin connect
Connect the second detection pin, the control pin connection first control pin or the second control pin；Described
One charging port connects first input unit, and second charging port connects second input unit, the output
Unit connects the battery module.
8. a kind of charging system, which is characterized in that including the first charging unit, the second charging unit and as claimed in claim 7
Mobile terminal；First charging unit connects first charging port, and first charging unit passes through described the
One charging port, first input unit, the first control circuit and the output unit are battery module charging；
Second charging unit connects second charging port, and second charging unit by second charging port,
Second input unit, the second control circuit and the output unit are battery module charging.
9. charging system as claimed in claim 8, which is characterized in that first charging unit and second charging unit
Corresponding for one of seat charger or USB charger, first charging port and second charging port are seat
Fill one of charging port or USB charging port.
10. charging system as claimed in claim 9, which is characterized in that the first input positive terminal and first input
Negative pole end is vdd terminal and the end GND of the seat charger, and the second input positive terminal and the second input negative pole end are
The vdd terminal of USB charger and the end GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910052004.7A CN109599920B (en) | 2019-01-21 | 2019-01-21 | Charging path control circuit, mobile terminal and charging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910052004.7A CN109599920B (en) | 2019-01-21 | 2019-01-21 | Charging path control circuit, mobile terminal and charging system |
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| CN109599920A true CN109599920A (en) | 2019-04-09 |
| CN109599920B CN109599920B (en) | 2022-07-12 |
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| CN201910052004.7A Active CN109599920B (en) | 2019-01-21 | 2019-01-21 | Charging path control circuit, mobile terminal and charging system |
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| CN112186859A (en) * | 2020-10-14 | 2021-01-05 | 上海畅联智融通讯科技有限公司 | Mobile terminal and charging circuit thereof |
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| CN109599920B (en) | 2022-07-12 |
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