CN105978097A - Charging control circuit and charging device - Google Patents
Charging control circuit and charging device Download PDFInfo
- Publication number
- CN105978097A CN105978097A CN201610478996.6A CN201610478996A CN105978097A CN 105978097 A CN105978097 A CN 105978097A CN 201610478996 A CN201610478996 A CN 201610478996A CN 105978097 A CN105978097 A CN 105978097A
- Authority
- CN
- China
- Prior art keywords
- circuit
- input
- resistance
- voltage
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- H02J7/00038—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors
- H02J7/00041—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange using passive battery identification means, e.g. resistors or capacitors in response to measured battery parameters, e.g. voltage, current or temperature profile
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the power source charging control field and provides a charging control circuit and a charging device. According to the charging device, a voltage conversion circuit is controlled through a driving circuit having different parameters for adjusting a charging voltage value to satisfy charging demands of different mobile terminals, user output cost is saved, charging demands of the multiple mobile terminals can be satisfied through only one charging device, and user use experience is further improved.
Description
Technical field
The invention belongs to the control field that charges, particularly relate to a kind of charging control circuit and charging device.
Background technology
Along with the development of mobile terminal technology, mobile terminal (mobile phone, panel computer and electronic reader etc.) is that we work, live and learn to provide a great convenience.
But, general family possesses multiple mobile terminal, and different mobile terminal is equipped with again different chargers, and the specification of different charger is different, it is impossible to general so that the different charger of Family needs meets the charge requirement of different mobile terminal, increase user's expenditure cost, reduce user's experience.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of charging control circuit, it is intended to solving current charger can not be to the problem of different mobile terminal charging.
In order to solve the problems referred to above, the embodiment of the present invention is achieved in that a kind of charging control circuit, is connected between DC source mobile terminal, and described circuit includes:
The supply voltage that described DC source exports is converted to the voltage conversion circuit of the first charging voltage needed for the first mobile terminal or the second charging voltage needed for the second mobile terminal, the input of described voltage conversion circuit is connected with described power supply, and the outfan of described voltage conversion circuit is connected with described first mobile terminal or described second mobile terminal；
Change according to described first charging voltage controls described voltage conversion circuit and adjusts the first drive circuit of described charging voltage, described first drive circuit includes the first parameter, the input of described first drive circuit is connected with the outfan of described voltage conversion circuit, and the outfan of described first drive circuit is connected with the control end of described voltage conversion circuit；
Change according to described second charging voltage controls described voltage conversion circuit and adjusts the second drive circuit of described charging voltage, described second drive circuit includes the second parameter, the input of described second drive circuit is connected with the outfan of described voltage conversion circuit, and the outfan of described second drive circuit is connected with the control end of described voltage conversion circuit；
Select to be regulated the first control circuit of described charging voltage by described first drive circuit or described second drive circuit according to described first mobile terminal or described second mobile terminal, the input of described first control circuit is connected with the outfan of peripheral control unit, and the outfan of described first control circuit is connected with the control end of described first drive circuit and described second drive circuit simultaneously.
The purpose of the embodiment of the present invention also resides in a kind of charging device including above-mentioned charging control circuit of offer.
In embodiments of the present invention, by including that the drive circuit of different parameters controls voltage conversion circuit and adjusts the value of charging voltage, to adapt to the demand of different mobile terminal charging, save user's cost output, multiple mobile terminals only need a charging device just can meet charge requirement, promote user's experience.
Accompanying drawing explanation
The structure chart of the charging control circuit that Fig. 1 provides for the embodiment of the present invention；
The structure chart of the charging control circuit that Fig. 2 provides for one embodiment of the present invention；
The structure chart of the protection circuit that Fig. 3 provides for one embodiment of the present invention；
The exemplary circuit figure of the first current protecting circuit that Fig. 4 provides for the embodiment of the present invention；
The exemplary circuit figure of the first voltage protection circuit that Fig. 5 provides for the embodiment of the present invention；
The exemplary circuit figure of the second current protecting circuit that Fig. 6 provides for the embodiment of the present invention；
The exemplary circuit figure of the second voltage protection circuit that Fig. 7 provides for the embodiment of the present invention；
The first drive circuit that Fig. 8 provides for the embodiment of the present invention and the exemplary circuit figure of the second drive circuit.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with specific embodiment the present invention implemented and is described in detail:
Fig. 1 shows the structure of the charging control circuit that the embodiment of the present invention provides, and for convenience of description, illustrate only part related to the present invention.
The charging control circuit that the embodiment of the present invention provides is connected between DC source and mobile terminal 2, including:
Voltage conversion circuit 11, for the supply voltage that DC source (power supply that DC source is portable power source or city's alternating current exports after AC-DC conversion) exports is converted to the charging voltage needed for mobile terminal, the first charging voltage is exported during the most corresponding first mobile terminal, the second charging voltage is exported during corresponding second mobile terminal, the input of this voltage conversion circuit 11 is connected with power supply, and the outfan of voltage conversion circuit 11 is the first mobile terminal or the second mobile terminal with mobile terminal 2(mobile terminal 2 herein) it is connected；
First drive circuit 12, control voltage conversion circuit 11 for the change according to the first charging voltage and adjust charging voltage, this first drive circuit 12 includes the first parameter, the input of this first drive circuit 12 is connected with the outfan of voltage conversion circuit 11, and the outfan of the first drive circuit 12 is connected with the control end of voltage conversion circuit 11；
Second drive circuit 13, control voltage conversion circuit 11 for the change according to the second charging voltage and adjust charging voltage, this second drive circuit 13 includes the second parameter, the input of this second drive circuit 13 is connected with the outfan of voltage conversion circuit 11, and the outfan of the second drive circuit 13 is connected with the control end of voltage conversion circuit 11；
In embodiments of the present invention, first drive circuit 12 and the second drive circuit 13 include that the first parameter and the second parameter, so-called first parameter, the second parameter refer to the combination that the parameter of the first drive circuit 12 and the second drive circuit 13 each device internal sets respectively respectively.
If the first drive circuit 12 or the second drive circuit 13 detect charging voltage too high (compared with mobile terminal nominal charging voltage), then control voltage conversion circuit 11 and reduce the value of charging voltage, if the first drive circuit 12 or the second drive circuit 13 detect charging voltage too low (compared with mobile terminal nominal charging voltage), then control voltage conversion circuit 11 and raise the value of charging voltage.
First control circuit 14, select to regulate charging voltage by the first drive circuit 12 or the second drive circuit 13 for the demand according to the first mobile terminal or the second mobile terminal, the input of this first control circuit 14 is connected with the outfan of peripheral control unit 3, and the outfan of first control circuit 14 is connected with the control end of the first drive circuit 12 and the second drive circuit 13 simultaneously.
In embodiments of the present invention, when mobile terminal changes, select to include that charging voltage is adjusted, to adapt to different mobile terminal by the first drive circuit 12 of different parameters or the second drive circuit 13 according to the change of charging voltage.
The embodiment of the present invention is when mobile terminal changes, by including that the drive circuit of different parameters controls voltage conversion circuit and adjusts the value of charging voltage, to adapt to the demand of different mobile terminal, and without changing circuit structure, this circuit structure is simple, stability is high, it is achieved low cost.
As one embodiment of the invention, seeing Fig. 8, the first drive circuit 12 includes:
Tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 3rd optocoupler IC3, the 3rd semiconductor switch device Q3 and the first error amplifier IC6；
nullOne end of tenth resistance R10 is the input of the first drive circuit 12，The other end of the tenth resistance R10 is connected with one end of the 11st resistance R11 and one end of the 12nd resistance R12 simultaneously，The other end ground connection of the 11st resistance R11，The other end of the 12nd resistance R12 and the current input terminal of the 3rd semiconductor switch device Q3 connect，The current output terminal ground connection of the 3rd semiconductor switch device Q3，3rd semiconductor switch device Q3 controls the control end that end is the first drive circuit 12，The light emitting diode IC3A anode of the 3rd optocoupler IC3 is the input of the first drive circuit 12 simultaneously，The light emitting diode IC3A negative electrode of the 3rd optocoupler IC3 and the negative electrode K of the first error amplifier IC6 connect，The anode A ground connection of the first error amplifier IC6，The other end of the input R and the tenth resistance R10 of the first error amplifier IC6 connects，The outfan of audion IC3B current collection extremely first drive circuit 12 of the 3rd optocoupler IC3，The audion IC3B grounded emitter of the 3rd optocoupler IC3.
Second drive circuit 13 includes:
13rd resistance R13, the 14th resistance R14, the 15th resistance R15, the 4th optocoupler IC4, the 4th semiconductor switch device Q4 and the second error amplifier IC5；
nullOne end of 13rd resistance R13 is the input of the second drive circuit 13，The other end of the 13rd resistance R13 is connected with one end of the 14th resistance R14 and one end of the 15th resistance R15 simultaneously，The other end ground connection of the 14th resistance R14，The other end of the 15th resistance R15 and the current input terminal of the 4th semiconductor switch device Q4 connect，The current output terminal ground connection of the 4th semiconductor switch device Q4，4th semiconductor switch device Q4 controls the control end that end is the second drive circuit 13，The light emitting diode IC4A anode of the 4th optocoupler IC4 is the input of the second drive circuit 13 simultaneously，The light emitting diode IC4A negative electrode of the 4th optocoupler IC4 and the negative electrode K of the second error amplifier IC5 connect，The anode A ground connection of the second error amplifier IC5，The other end of the input R and the 13rd resistance R13 of the second error amplifier IC5 connects，The outfan of audion IC4B current collection extremely second drive circuit 13 of the 4th optocoupler IC4，The audion IC4B grounded emitter of the 4th optocoupler IC4.
As one embodiment of the present invention, 3rd semiconductor switch device Q3 and the 4th semiconductor switch device Q4 all can use audion or metal-oxide-semiconductor to realize, such as, in the embodiment of the present invention, 3rd semiconductor switch device Q3 and the 4th semiconductor switch device Q4 is N-type metal-oxide-semiconductor, wherein, the drain electrode of N-type metal-oxide-semiconductor is the 3rd semiconductor switch device Q3 or the current input terminal of the 4th semiconductor switch device Q4, the source electrode of N-type metal-oxide-semiconductor is the 3rd semiconductor switch device Q3 or the current output terminal of the 4th semiconductor switch device Q4, the grid of N-type metal-oxide-semiconductor is the 3rd semiconductor switch device Q3 or the control end of the 4th semiconductor switch device Q4.
In embodiments of the present invention, in an initial condition, regulation the tenth resistance R10 and the 11st resistance R11, the 13rd resistance R13 and the dividing potential drop of the 14th resistance R14 respectively, make the resistance resistance more than the 14th resistance R14 of the 11st resistance R11, so that the first drive circuit 12 does not works, the second drive circuit 13 works.
nullWhen connecting the first mobile terminal，Charging voltage is Vout1，Owing to now the first drive circuit 12 does not works、Second drive circuit 13 works，Peripheral control unit 3 controls first control circuit 14 by control signal Sin2 and exports control signal Sout8 to the first drive circuit 12、Control signal Sout9 is exported to the second drive circuit 13，Making control signal Sout8 is high level、When control signal Sout9 is low level，Now，N-type metal-oxide-semiconductor Q3 turns on、N-type metal-oxide-semiconductor Q4 turns off，11st resistance R11 and the 12nd resistance R12 constitutes parallel-connection structure，All-in resistance after its parallel connection reduces (less than the resistance of the 15th resistance R15)，The input terminal voltage causing the first error amplifier IC6 reduces (less than predetermined reference voltage)，First error amplifier IC6 work，Tenth resistance R10、11st resistance R11、12nd resistance R12 collectively forms the feedback circuit of the first drive circuit 12，Owing to the resistance after the 11st resistance R11 and the 12nd resistance R12 parallel connection is less than the 15th resistance R15，Therefore the second error amplifier IC5 does not works，First error amplifier IC6 work，I.e. second drive circuit 13 quits work，First drive circuit 12 is started working；
nullWhen connecting the second mobile terminal，Charging voltage is Vout2，Owing to now the first drive circuit 12 works、Second drive circuit 13 does not works，Peripheral control unit 3 controls first control circuit 14 by control signal Sin2 and exports control signal Sout8 to the first drive circuit 12、Control signal Sout9 is exported to the second drive circuit 13，Making control signal Sout8 is low level、Control signal Sout9 is high level，Now，N-type metal-oxide-semiconductor Q4 turns on、N-type metal-oxide-semiconductor Q3 turns off，14th resistance R14 and the 15th resistance R15 constitutes parallel-connection structure，All-in resistance after its parallel connection reduces (less than the resistance of the 12nd resistance R12)，The input terminal voltage causing the second error amplifier IC5 reduces (less than predetermined reference voltage)，Second error amplifier IC5 work，13rd resistance R13、14th resistance R14、15th resistance R15 collectively forms the feedback circuit of the second drive circuit 13，Owing to the resistance after the 14th resistance R14 and the 15th resistance R15 parallel connection is less than the 12nd resistance R12，Therefore the first error amplifier IC6 quits work，Second error amplifier IC5 work，I.e. first drive circuit 12 quits work，Second drive circuit 13 is started working，Realize the switching between two drive circuits.
The embodiment of the present invention is when mobile terminal converts, control first control circuit 14 by control signal Sin2 between the first drive circuit 12 and the second drive circuit 13, realize switching, to realize causing the charging voltage significantly changed to be adjusted by the drive circuit of different parameters to owing to mobile terminal changes.
Fig. 2 shows the preferred structure of the charging control circuit that the embodiment of the present invention provides, and for convenience of description, illustrate only part related to the present invention.
It is contemplated that the security and stability of charging control circuit, can increase protection circuit and charging control circuit realizes overcurrent protection and overvoltage protection, details are as follows:
As one embodiment of the invention, charging control circuit also includes:
Current sampling circuit 15, for detecting charging current, this charging current refers to when being connected with the first mobile terminal, the first charging current to the first mobile terminal output, or when being connected with the second mobile terminal, to the second charging current of the second mobile terminal output, the input of this current sampling circuit 15 is connected with the outfan of voltage conversion circuit 11, the outfan of current sampling circuit 15 and mobile terminal 2(the first mobile terminal or the second mobile terminal) it is connected；
Protection circuit 16, for described first charging current more than the first pre-set current value or described first charging voltage more than the first preset voltage value time, or described second charging current more than the second pre-set current value or described second charging voltage more than the second preset voltage value time, control voltage conversion circuit 11 and enter protection state, the first input end of this protection circuit 16 is connected with the input of current sampling circuit 15, second input of protection circuit 16 is connected with the outfan of current sampling circuit 15, the end that controls of protection circuit 16 is connected with the outfan of peripheral control unit 3, the outfan of protection circuit 16 controls end with the protection state of voltage conversion circuit 11 and is connected.
In embodiments of the present invention; detect charging current by current sampling circuit 15 thus obtain the voltage at current sampling circuit 15 two ends; and when charging current is too high; output overcurrent or overvoltage protection signal; carry out protectiveness shutoff, safety problem during to ensure power supply mobile terminal or power failure, will not be brought.
Fig. 3 shows the preferred structure of protection circuit in the charging control circuit that the embodiment of the present invention provides, and for convenience of description, illustrate only part related to the present invention.
As one embodiment of the invention, protection circuit 16 includes:
First current protecting circuit 161; protection state is entered for controlling voltage conversion circuit 11 when the first charging current is more than the first pre-set current value; the first input end of this first current protecting circuit 161 is the first input end of protection circuit 16; second input that second input is protection circuit 16 of the first current protecting circuit 161, the outfan that outfan is protection circuit 16 of the first current protecting circuit 161；
Second current protecting circuit 162; protection state is entered for controlling voltage conversion circuit 11 when the second charging current is more than the second pre-set current value; the first input end of this second current protecting circuit 162 is the first input end of protection circuit 16; second input that second input is protection circuit 16 of the second current protecting circuit 162, the outfan that outfan is protection circuit 16 of the second current protecting circuit 162；
First voltage protection circuit 163; protection state is entered for controlling voltage conversion circuit 11 when the first charging voltage is more than the first preset voltage value; the input of this first voltage protection circuit 163 is the second input of protection circuit 16, the outfan that outfan is protection circuit 16 of the first voltage protection circuit 163；
Second voltage protection circuit 164; protection state is entered for controlling voltage conversion circuit 11 when the second charging voltage is more than the second preset voltage value; the input of this second voltage protection circuit 164 is the second input of protection circuit 16, the outfan that outfan is protection circuit 16 of the second voltage protection circuit 164；
Second control circuit 165, over-current over-voltage protection is realized by the first current protecting circuit 161 and the first voltage protection circuit 163 for switching according to the first mobile terminal or the second mobile terminal, or realize over-current over-voltage protection by the second current protecting circuit 162 and the second voltage protection circuit 164, the input of this second control circuit 165 is the control end of protection circuit 16, first outfan of second control circuit 165 is connected with the control end controlling end and the first voltage protection circuit 163 of the first current protecting circuit 161 simultaneously, second outfan of second control circuit 165 is connected with the control end controlling end and the second voltage protection circuit 164 of the second current protecting circuit 162 simultaneously.As one embodiment of the invention, charging control circuit can also include one the 3rd control circuit 17, exports to voltage conversion circuit 11 after being controlled processing to multiple overcurrent protection signals of protection circuit 16 output or overvoltage protection signal.
In embodiments of the present invention; peripheral control unit 3 selects to realize protection by the first protection circuit according to the demand modeling control module 165 of user instruction or the mobile terminal of different voltage or the second protection circuit realizes protection; when the first charging voltage or the first charging current too high (more than the first pre-set current value or the first preset voltage value), the first current protecting circuit 161 or the output of the first voltage protection circuit 163 enable signal control voltage conversion circuit 11 and enter protection state；When the second charging voltage or the second charging current too high (more than the second pre-set current value or the second preset voltage value); second current protecting circuit 162 or the output of the second voltage protection circuit 164 enable signal control voltage conversion circuit 11 and enter protection state; to prevent, circuit because curtage is excessive to be burnt, and even causes safety problem.
Herein, first pre-set current value or the first preset voltage value can set according to the actual requirements, such as arrange that the first pre-set current value is the first mobile terminal rated current 120%, arrange that the first preset voltage value is the first mobile terminal nominal charging voltage 120%, equally, can arrange that the second pre-set current value is the second mobile terminal rated current 120%, arrange that the second preset voltage value is the second mobile terminal nominal charging voltage 120%.
Mobile terminal (first mobile terminal or the second mobile terminal) charging current different due to correspondence is different with charging voltage; the most corresponding different charging current and charging voltage; respectively by the first current protecting circuit 161 and the second current protecting circuit 162; and second arrange different parameters in current protecting circuit 162 and the second voltage protection circuit 164, respectively different voltage to be carried out the over-current over-voltage protection of different threshold value.
And current protecting circuit should be corresponding with the quantity of drive circuit with the quantity of voltage protection circuit, each drive circuit all should a corresponding current protecting circuit and a voltage protection circuit.
First protection circuit includes the first current protecting circuit 161 and the first voltage protection circuit 163, and the second protection circuit includes the second current protecting circuit 162 and the second voltage protection circuit 164.
Details are as follows for the exemplary circuit of protection circuit 16, wherein
First current protecting circuit 161, sees Fig. 4, including:
First resistance R1, the second resistance R2, the 3rd resistance R3, the first operational amplifier U1, the first diode D1, the second semiconductor switch device Q2, the second optocoupler IC2；
nullOne end of first resistance R1 is the second input of the first current protecting circuit 161，The other end of the first resistance R1 and the inverting input of the first operational amplifier U1 connect，One end of second resistance R2 is the first input end of the first current protecting circuit 161，The other end of the second resistance R2 and the normal phase input end of the first operational amplifier U1 connect，The normal phase input end of the first operational amplifier U1 is also by the 3rd resistance R3 ground connection，The outfan of the first operational amplifier U1 and the anode of the first diode D1 connect，The negative electrode of the first diode D1 is the control end of the first current protecting circuit 161，The outfan of the first operational amplifier U1 also control end with the second semiconductor switch device Q2 is connected，The current output terminal ground connection of the second semiconductor switch device Q2，The current input terminal of the second semiconductor switch device Q2 and the light emitting diode IC2A negative electrode of the second optocoupler IC2 connect，Second input that light emitting diode IC2A anode is the first current protecting circuit 161 of the second optocoupler IC2，The audion IC2B grounded emitter of the second optocoupler IC2，The outfan of audion IC2B current collection extremely first current protecting circuit 161 of the second optocoupler IC2.
In embodiments of the present invention; voltage VA1, the VB1 between node A, B is detected by comparator or operational amplifier; when voltage difference between two nodes is excessive; i.e. charging current exceeded stream setting value; adjust the second resistance R2, the resistance of the 3rd resistance R3; make comparator or operational amplifier output high level, control voltage conversion circuit 11 and realize overcurrent protection.
First voltage protection circuit 163, sees Fig. 5, including:
First Zener diode Z1, the first optocoupler IC1 and the first semiconductor switch device Q1；
The negative electrode of the first Zener diode Z1 is the input of the first voltage protection circuit 163, the anode of the first Zener diode Z1 and the light emitting diode IC1A anode of the first optocoupler IC1 connect, the light emitting diode IC1A negative electrode of the first optocoupler IC1 and the current input terminal of the first semiconductor switch device Q1 connect, the output head grounding of the first semiconductor switch device Q1, first semiconductor switch device Q1 controls the control end that end is the first voltage protection circuit 163, the outfan of audion IC1B current collection extremely first voltage protection circuit 163 of the first optocoupler IC1, the audion IC1B grounded emitter of the first optocoupler IC1.
In embodiments of the present invention, when charging voltage Vout1 exceedes overvoltage setting value, the first Zener diode Z1 is breakdown, and optocoupler IC1 conducting realizes overvoltage protection.
Second current protecting circuit 162, sees Fig. 6, including:
7th resistance R7, the 8th resistance R8, the 9th resistance R9 and the 3rd operational amplifier U3, the second diode D2, the 6th semiconductor switch device Q6, the 6th optocoupler IC6；
nullOne end of 7th resistance R7 is the second input of the second current protecting circuit 162，The other end of the 7th resistance R7 and the inverting input of the 3rd operational amplifier U3 connect，One end of 8th resistance R8 is the first input end of the second current protecting circuit 162，The other end of the 8th resistance R8 and the normal phase input end of the 3rd operational amplifier U3 connect，The normal phase input end of the 3rd operational amplifier U3 is also by the 9th resistance R9 ground connection，The outfan of the 3rd operational amplifier U3 and the anode of the second diode D2 connect，The negative electrode of the second diode D2 is the control end of the second current protecting circuit 162，The outfan of the 3rd operational amplifier U3 also control end with the 6th semiconductor switch device Q6 is connected，The current input terminal of the 6th semiconductor switch device Q6 and the light emitting diode IC6A negative electrode of the 6th optocoupler IC6 connect，Second input that light emitting diode IC6A anode is the second current protecting circuit 162 of the 6th optocoupler IC6，The current output terminal ground connection of the 6th semiconductor switch device Q6，The audion IC6B grounded emitter of the 6th optocoupler IC6，The outfan of audion IC6B current collection extremely second current protecting circuit 162 of the 6th optocoupler IC6.
Second voltage protection circuit 164, sees Fig. 7, including:
Second Zener diode Z2, the 5th optocoupler IC5 and the 5th semiconductor switch device Q5；
The negative electrode of the second Zener diode Z2 is the input of the second voltage protection circuit 164, the anode of the second Zener diode Z2 and the light emitting diode IC5A anode of the 5th optocoupler IC5 connect, the light emitting diode IC5A negative electrode of the 5th optocoupler IC5 and the current input terminal of the 5th semiconductor switch device Q5 connect, the output head grounding of the 5th semiconductor switch device Q5, 5th semiconductor switch device Q5 controls the control end that end is the second voltage protection circuit 164, the outfan of audion IC5B current collection extremely second voltage protection circuit 164 of the 5th optocoupler IC5, the audion IC5B grounded emitter of the 5th optocoupler IC5.
In embodiments of the present invention, when charging voltage Vout2 exceedes overvoltage setting value, the second Zener diode Z2 is breakdown, and optocoupler IC5 conducting realizes overvoltage protection.
As one embodiment of the invention, the first operational amplifier U1 to the 3rd operational amplifier U3 all can be replaced with comparator.
nullAs one embodiment of the present invention，First semiconductor switch device Q1、Second semiconductor switch device Q2、5th semiconductor switch device Q5、6th semiconductor switch device Q6 all can use audion or metal-oxide-semiconductor to realize，Such as，In the embodiment of the present invention，First semiconductor switch device Q1、Second semiconductor switch device Q2、5th semiconductor switch device Q5、6th semiconductor switch device Q6 is N-type metal-oxide-semiconductor，Wherein，The drain electrode of N-type metal-oxide-semiconductor is the first semiconductor switch device Q1、Second semiconductor switch device Q2、5th semiconductor switch device Q5 or the current input terminal of the 6th semiconductor switch device Q6，The source electrode of N-type metal-oxide-semiconductor is the first semiconductor switch device Q1、Second semiconductor switch device Q2、5th semiconductor switch device Q5 or the current output terminal of the 6th semiconductor switch device Q6，The grid of N-type metal-oxide-semiconductor is the first semiconductor switch device Q1、Second semiconductor switch device Q2、5th semiconductor switch device Q5 or the control end of the 6th semiconductor switch device Q6.
In embodiments of the present invention, assume when connecting the first mobile terminal, charging voltage is Vout1, charging current is Iout1, peripheral control unit 3 controls second control circuit 165 by control signal Sin1 and exports control signal Sout5 to the first voltage protection circuit 163 and the first current protecting circuit 161, respectively to the second voltage protection circuit 164 and the second current protecting circuit 162 control signal Sout6, when control signal Sout5 is high level, control signal Sout6 is low level, now, N-type metal-oxide-semiconductor Q1 turns on, first voltage protection circuit 163 works, second voltage protection circuit 164 does not works, overvoltage protection is realized by the first voltage protection circuit 163.When charging voltage Vout1 reaches overvoltage set point, the first voltage protection circuit 163 is to voltage conversion circuit 11 output signal Sout1, so that charging control circuit is in overvoltage protection state.
nullWhen charging current Iout1 reached stream set point，Node A is detected by current sampling circuit 15、Voltage between B，As node A、When voltage difference between B is excessive，When i.e. charging current Iout1 is excessive，Voltage difference between node B voltage VB1 and node A voltage VA1 increases，First operational amplifier U1 output high level controls N-type metal-oxide-semiconductor Q2 conducting，And then startup the first current protecting circuit 161 works，First current protecting circuit 161 is to voltage conversion circuit 11 output signal Sout2，So that charging control circuit is in overcurrent protection state，And owing to now control signal Sout6 is low level，No matter the 3rd operational amplifier U3 exports any signal，The grid of N-type metal-oxide-semiconductor Q6 is pulled low by the second diode D2 all the time，Therefore，Second current protecting circuit 162 does not has signal to export.
When connecting the second mobile terminal; charging voltage becomes Vout2, charging current is Iout2; peripheral control unit 3 controls control signal Sout5 and control signal Sout6 of high level of second control circuit 165 output low level; now; N-type metal-oxide-semiconductor Q5 conducting, N-type metal-oxide-semiconductor Q1 turn off; second voltage protection circuit 164 works, and the first voltage protection circuit 163 does not works, and completes from the first protection circuit to the switching of the second protection circuit.When charging voltage Vout2 reaches overvoltage setting value, the second voltage protection circuit 164 is to voltage conversion circuit 11 output signal Sout3, so that charging control circuit is in overvoltage protection state.
nullWhen charging current Iout2 reached stream setting value，Node A is detected by current sampling circuit 15、Voltage between B，As node A、When voltage difference between B is excessive，When i.e. charging current Iout2 is excessive，Voltage difference between node B voltage VB2 and node A voltage VA2 increases，3rd operational amplifier U3 output high level controls N-type metal-oxide-semiconductor Q6 conducting，And then startup the second current protecting circuit 162 works，Second current protecting circuit 162 is to voltage conversion circuit 11 output signal Sout4，So that charging control circuit is in overcurrent protection state，And owing to now control signal Sout5 is low level，No matter the first operational amplifier U1 exports any signal，The grid of N-type metal-oxide-semiconductor Q2 is pulled low by the first diode D1 all the time，Therefore，First current protecting circuit 161 does not has signal to export.
In embodiments of the present invention, by including that the drive circuit of different parameters controls voltage conversion circuit and adjusts the value of charging voltage, to adapt to the demand of different mobile terminal charging, save user's cost output, multiple mobile terminals only need a charging device just can meet charge requirement, promote user's experience.
These are only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent and improvement etc. made within the spirit and principles in the present invention, should be included within the scope of the present invention.
Claims (9)
1. a charging control circuit, is connected between DC source and mobile terminal, it is characterised in that described circuit includes:
The supply voltage that described DC source exports is converted to the voltage conversion circuit of the first charging voltage needed for the first mobile terminal or the second charging voltage needed for the second mobile terminal, the input of described voltage conversion circuit is connected with described power supply, and the outfan of described voltage conversion circuit is connected with described first mobile terminal or described second mobile terminal；
Change according to described first charging voltage controls described voltage conversion circuit and adjusts the first drive circuit of described charging voltage, described first drive circuit includes the first parameter, the input of described first drive circuit is connected with the outfan of described voltage conversion circuit, and the outfan of described first drive circuit is connected with the control end of described voltage conversion circuit；
Change according to described second charging voltage controls described voltage conversion circuit and adjusts the second drive circuit of described charging voltage, described second drive circuit includes the second parameter, the input of described second drive circuit is connected with the outfan of described voltage conversion circuit, and the outfan of described second drive circuit is connected with the control end of described voltage conversion circuit；
Select to be regulated the first control circuit of described charging voltage by described first drive circuit or described second drive circuit according to described first mobile terminal or described second mobile terminal, the input of described first control circuit is connected with the outfan of peripheral control unit, and the outfan of described first control circuit is connected with the control end of described first drive circuit and described second drive circuit simultaneously.
2. circuit as claimed in claim 1, it is characterised in that described circuit also includes:
Detection exports the first charging current to described first mobile terminal or output to the current sampling circuit of the second charging current of described second mobile terminal, the input of described current sampling circuit is connected with the outfan of described voltage conversion circuit, and the outfan of described current sampling circuit is connected with described first mobile terminal or described second mobile terminal；
Described first charging current more than the first pre-set current value or described first charging voltage more than the first preset voltage value time, or described second charging current more than the second pre-set current value or described second charging voltage more than the second preset voltage value time, control described voltage conversion circuit and enter the protection circuit of protection state, the first input end of described protection circuit is connected with the input of described current sampling circuit, second input of described protection circuit is connected with the outfan of described current sampling circuit, the end that controls of protection circuit described in current sampling circuit is connected with the outfan of described peripheral control unit, the outfan of described protection circuit controls end with the protection state of described voltage conversion circuit and is connected.
3. circuit as claimed in claim 2; it is characterized in that; described protection circuit includes: controls described voltage conversion circuit when described first charging current exceedes described first pre-set current value and enters the first current protecting circuit of protection state; the first input end that first input end is described protection circuit of described first current protecting circuit; second input that second input is described protection circuit of described first current protecting circuit, the outfan that outfan is described protection circuit of described first current protecting circuit；Control described voltage conversion circuit when described second charging current exceedes described second pre-set current value and enter the second current protecting circuit of protection state; the first input end that first input end is described protection circuit of described second current protecting circuit; second input that second input is described protection circuit of described second current protecting circuit, the outfan that outfan is described protection circuit of described second current protecting circuit；Control described voltage conversion circuit when described first charging voltage exceedes described first preset voltage value and enter the first voltage protection circuit of protection state; second input that input is described protection circuit of described first voltage protection circuit, the outfan that outfan is described protection circuit of described first voltage protection circuit；
Control described voltage conversion circuit when described second charging voltage exceedes described second preset voltage value and enter the second voltage protection circuit of protection state; second input that input is described protection circuit of described second voltage protection circuit, the outfan that outfan is described protection circuit of described second voltage protection circuit；Over-current over-voltage protection is realized by described first current protecting circuit and described first voltage protection circuit according to described first mobile terminal or described second mobile terminal switching, or the second control circuit of over-current over-voltage protection is realized by described second current protecting circuit and described second voltage protection circuit, the input of described second control circuit is the control end of described protection circuit, first outfan of described second control circuit is connected with the control end controlling end and described first voltage protection circuit of described first current protecting circuit simultaneously, second outfan of described second control circuit is connected with the control end controlling end and described second voltage protection circuit of described second current protecting circuit simultaneously.
4. circuit as claimed in claim 1, it is characterised in that described first drive circuit includes: the tenth resistance, the 11st resistance, the 12nd resistance, the 3rd optocoupler, the 3rd semiconductor switch device and the first error amplifier；nullThe input that one end is described first drive circuit of described tenth resistance，The other end of described tenth resistance is connected with one end of described 11st resistance and one end of described 12nd resistance simultaneously，The other end ground connection of described 11st resistance，The other end of described 12nd resistance is connected with the current input terminal of described 3rd semiconductor switch device，The current output terminal ground connection of described 3rd semiconductor switch device，The control end that control end is described first drive circuit of described 3rd semiconductor switch device，The light-emitting diodes tube anode of described 3rd optocoupler is the input of described first drive circuit simultaneously，The light-emitting diodes tube cathode of described 3rd optocoupler is connected with the negative electrode of described first error amplifier，The plus earth of described first error amplifier，The input of described first error amplifier is connected with the other end of described tenth resistance，The outfan that transistor collector is described first drive circuit of described 3rd optocoupler，The transistor emitter ground connection of described 3rd optocoupler；Described second drive circuit includes: the 13rd resistance, the 14th resistance, the 15th resistance, the 4th optocoupler, the 4th semiconductor switch device and the second error amplifier；nullThe input that one end is described second drive circuit of described 13rd resistance，The other end of described 13rd resistance is connected with one end of described 14th resistance and one end of described 15th resistance simultaneously，The other end ground connection of described 14th resistance，The other end of described 15th resistance is connected with the current input terminal of described 4th semiconductor switch device，The current output terminal ground connection of described 4th semiconductor switch device，The control end that control end is described second drive circuit of described 4th semiconductor switch device，The light-emitting diodes tube anode of described 4th optocoupler is the input of described second drive circuit simultaneously，The light-emitting diodes tube cathode of described 4th optocoupler is connected with the negative electrode of described second error amplifier，The plus earth of described second error amplifier，The input of described second error amplifier is connected with the other end of described 13rd resistance，The outfan that transistor collector is described second drive circuit of described 4th optocoupler，The transistor emitter ground connection of described 4th optocoupler.
5. circuit as claimed in claim 3, it is characterised in that described first current protecting circuit includes: the first resistance, the second resistance, the 3rd resistance, the first operational amplifier, the first diode, the second semiconductor switch device, the second optocoupler；nullOne end of described first resistance is the second input of described first current protecting circuit，The other end of described first resistance is connected with the inverting input of described first operational amplifier，One end of described second resistance is the first input end of described first current protecting circuit，The other end of described second resistance is connected with the normal phase input end of described first operational amplifier，The normal phase input end of described first operational amplifier is also by described 3rd resistance eutral grounding，The outfan of described first operational amplifier is connected with the anode of described first diode，The negative electrode of described first diode is the control end of described first current protecting circuit，The outfan of described first operational amplifier also control end with described second semiconductor switch device is connected，The current output terminal ground connection of described second semiconductor switch device，The current input terminal of described second semiconductor switch device is connected with the light-emitting diodes tube cathode of described second optocoupler，The light-emitting diodes tube anode of described second optocoupler is the second input of described first current protecting circuit，The transistor emitter ground connection of described second optocoupler，The outfan that transistor collector is the first current protecting circuit of described second optocoupler.
6. circuit as claimed in claim 3, it is characterised in that described first voltage protection circuit includes: the first Zener diode, the first optocoupler and the first semiconductor switch device；The negative electrode of described first Zener diode is the input of described first voltage protection circuit, the anode of described first Zener diode is connected with the light-emitting diodes tube anode of described first optocoupler, the light-emitting diodes tube cathode of described first optocoupler is connected with the current input terminal of described first semiconductor switch device, the output head grounding of described first semiconductor switch device, the control end that control end is described first voltage protection circuit of described first semiconductor switch device, the transistor collector of described first optocoupler is the outfan of described first voltage protection circuit, the transistor emitter ground connection of described first optocoupler.
7. circuit as claimed in claim 3, it is characterised in that described second current protecting circuit includes: the 7th resistance, the 8th resistance, the 9th resistance and the 3rd operational amplifier, the second diode, the 6th semiconductor switch device, the 6th optocoupler；nullSecond input that one end is described second current protecting circuit of described 7th resistance，The other end of described 7th resistance is connected with the inverting input of described 3rd operational amplifier，The first input end that one end is described second current protecting circuit of described 8th resistance，The other end of described 8th resistance is connected with the normal phase input end of described 3rd operational amplifier，The normal phase input end of described 3rd operational amplifier is also by described 9th resistance eutral grounding，The outfan of described 3rd operational amplifier is connected with the anode of described second diode，The negative electrode of described second diode is the control end of described second current protecting circuit，The outfan of described 3rd operational amplifier also control end with described 6th semiconductor switch device is connected，The current input terminal of described 6th semiconductor switch device is connected with the light-emitting diodes tube cathode of described 6th optocoupler，Second input that light-emitting diodes tube anode is described second current protecting circuit of described 6th optocoupler，The current output terminal ground connection of described 6th semiconductor switch device，The transistor emitter ground connection of described 6th optocoupler，The outfan that transistor collector is described second current protecting circuit of described 6th optocoupler.
8. circuit as claimed in claim 3, it is characterised in that described second voltage protection circuit includes: the second Zener diode, the 5th optocoupler and the 5th semiconductor switch device；The negative electrode of described second Zener diode is the input of described second voltage protection circuit, the anode of described second Zener diode is connected with the light-emitting diodes tube anode of described 5th optocoupler, the light-emitting diodes tube cathode of described 5th optocoupler is connected with the current input terminal of described 5th semiconductor switch device, the output head grounding of described 5th semiconductor switch device, the control end that control end is described second voltage protection circuit of described 5th semiconductor switch device, the outfan that transistor collector is described second voltage protection circuit of described 5th optocoupler, the transistor emitter ground connection of described 5th optocoupler.
9. a charging device, it is characterised in that described charging device includes the charging control circuit as described in any one of claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478996.6A CN105978097A (en) | 2016-06-28 | 2016-06-28 | Charging control circuit and charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610478996.6A CN105978097A (en) | 2016-06-28 | 2016-06-28 | Charging control circuit and charging device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105978097A true CN105978097A (en) | 2016-09-28 |
Family
ID=57019675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610478996.6A Pending CN105978097A (en) | 2016-06-28 | 2016-06-28 | Charging control circuit and charging device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105978097A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204646A (en) * | 2017-06-09 | 2017-09-26 | 锤子科技（北京）股份有限公司 | A kind of charge control apparatus and charge control method |
| CN116054302A (en) * | 2022-06-29 | 2023-05-02 | 荣耀终端有限公司 | Charging circuit, electronic equipment and charging system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683931A (en) * | 2013-12-27 | 2014-03-26 | 深圳市航嘉驰源电气股份有限公司 | Power supply switching circuit |
| CN204967607U (en) * | 2015-08-19 | 2016-01-13 | 深圳市质能达微电子科技有限公司 | Supply circuit and LED lighting apparatus based on power tube |
| CN205029383U (en) * | 2015-09-30 | 2016-02-10 | 邓标生 | Electric bicycle removes charging circuit |
| CN105610204A (en) * | 2014-10-17 | 2016-05-25 | 致伸科技股份有限公司 | Wireless charging device and electric energy recovery method thereof |
-
2016
- 2016-06-28 CN CN201610478996.6A patent/CN105978097A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103683931A (en) * | 2013-12-27 | 2014-03-26 | 深圳市航嘉驰源电气股份有限公司 | Power supply switching circuit |
| CN105610204A (en) * | 2014-10-17 | 2016-05-25 | 致伸科技股份有限公司 | Wireless charging device and electric energy recovery method thereof |
| CN204967607U (en) * | 2015-08-19 | 2016-01-13 | 深圳市质能达微电子科技有限公司 | Supply circuit and LED lighting apparatus based on power tube |
| CN205029383U (en) * | 2015-09-30 | 2016-02-10 | 邓标生 | Electric bicycle removes charging circuit |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107204646A (en) * | 2017-06-09 | 2017-09-26 | 锤子科技（北京）股份有限公司 | A kind of charge control apparatus and charge control method |
| CN107204646B (en) * | 2017-06-09 | 2020-09-15 | 北京字节跳动网络技术有限公司 | Charging control equipment and charging control method |
| CN116054302A (en) * | 2022-06-29 | 2023-05-02 | 荣耀终端有限公司 | Charging circuit, electronic equipment and charging system |
| CN116054302B (en) * | 2022-06-29 | 2023-10-20 | 荣耀终端有限公司 | Charging circuit, electronic equipment and charging system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103683931B (en) | A kind of power-switching circuit | |
| US9391467B2 (en) | Step-up battery charging management system and control method thereof | |
| US11041889B2 (en) | Method for estimating load current of power supply, and USB-type converter | |
| CN103795040A (en) | Electronic device and power adapter thereof | |
| KR20120093709A (en) | Electric power supply apparatus of electric apparatus | |
| CN106208228A (en) | A kind of power-supply system | |
| GB2463339A (en) | DC-DC converter having protection for electrical appliance | |
| CN101986502A (en) | Mobile phone battery charging circuit | |
| CN105978097A (en) | Charging control circuit and charging device | |
| CN106849003A (en) | A kind of AC network safety electricity consumption protector | |
| CN110912225B (en) | Charging protection circuit, charging protection device and robot | |
| CN115276171B (en) | Charging control device and off-grid power supply system | |
| CN103683396A (en) | Self-adaptive battery equalization charge device and method with turnover protection function | |
| WO2020114028A1 (en) | Socket | |
| CN110854964A (en) | Charging control circuit and control method thereof | |
| CN216390540U (en) | Household appliance charging system based on Wifi | |
| CN103715748A (en) | Lithium battery charging circuit | |
| US20230099911A1 (en) | Adaptive boosting of rectified voltage in a wireless charging system | |
| CN111009958B (en) | Power supply control circuit | |
| CN208955345U (en) | A kind of USB interface with overheat protector | |
| CN208369292U (en) | Protect circuit and the charging equipment with the protection circuit | |
| CN109407592B (en) | Remote sensing monitoring control circuit | |
| CN105553054A (en) | Power management device for multi-power electronic equipment and power supply/charge management method | |
| CN201868933U (en) | Control circuit for primary-side feedback constant-voltage current-limiting RCC charger | |
| CN215580523U (en) | Medical equipment and power supply management system thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160928 |