CN105634062A - Charging circuit and system for mobile terminal - Google Patents
Charging circuit and system for mobile terminal Download PDFInfo
- Publication number
- CN105634062A CN105634062A CN201610063292.2A CN201610063292A CN105634062A CN 105634062 A CN105634062 A CN 105634062A CN 201610063292 A CN201610063292 A CN 201610063292A CN 105634062 A CN105634062 A CN 105634062A
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- Prior art keywords
- mobile terminal
- resistance
- charging circuit
- rechargeable battery
- electric capacity
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention belongs to the field of a mobile terminal, and provides a charging circuit and system for the mobile terminal. According to the charging circuit for the mobile terminal provided by the embodiments of the invention, the voltage of a rechargeable battery is detected through a voltage detecting end of a microprocessor; and the magnitude of the charging current for the rechargeable battery is adjusted by a current adjusting end of the microprocessor according to the magnitude of the detected voltage of the rechargeable battery. The charging circuit for the mobile terminal provided by the embodiments of the invention is simple in design, and capable of ensuring the stable operation of the charging circuit, prolonging the service time of the mobile terminal and further improving the user experience.
Description
Technical field
The invention belongs to field of mobile terminals, particularly relate to a kind of mobile terminal charging circuit and system.
Background technology
Mobile terminal broad sense say that including mobile phone, notebook, panel computer, POS even includes vehicle-mounted computer. Along with network and technology are towards the development in more and more broadband direction, Mobile Communication Industry will move towards the real mobile message epoch. On the other hand, along with developing rapidly of integrated circuit technique, the disposal ability of mobile terminal has had powerful disposal ability, and mobile terminal becomes an integrated information processing platform from simple call instrument. This also adds broader development space to mobile terminal.
Currently, the development of current mobile terminal is also limited by the development of mobile terminal built-in rechargeable battery, rely at present and be charged as mobile terminal continuation of the journey to rechargeable battery, but the charging current of mobile terminal designs complexity mostly, charged state is unstable, easy overshoot or be not fully filled, impacted to the service life of mobile terminal, reduced the experience of user.
Summary of the invention
The purpose of the embodiment of the present invention is in that to provide a kind of mobile terminal charging circuit, it is intended to solving charging circuit design complexity in existing mobile terminal charging circuit, charged state is unstable, the problem affecting the service life of mobile terminal.
The embodiment of the present invention is achieved in that a kind of mobile terminal charging circuit, and including charger and rechargeable battery, described circuit also includes: charge control module and microprocessor;
The input of described charge control module connects the outfan of the described charger of power supply, and outfan connects the input of described rechargeable battery;
The charging of described microprocessor controls end and is connected to the control end of described charge control module, and output control signal controls the work of described charge control module;
The voltage detecting end of described microprocessor is connected to the input of described rechargeable battery, and the voltage of rechargeable battery described in cell voltage is detected;
The electric current of described microprocessor adjusts end and is connected to the input of described charge control module, and charging current is adjusted by the size of the voltage of the described rechargeable battery detected according to voltage detecting end.
The another object of the embodiment of the present invention is in that to provide a kind of Mobile terminal charging system comprising above-mentioned mobile terminal charging circuit.
In the mobile terminal charging circuit that the embodiment of the present invention provides, by the voltage detecting end of microprocessor, the voltage of described rechargeable battery being detected, the electric current of microprocessor adjusts end and according to the size of the voltage of the described rechargeable battery detected, the size of the charging current of described rechargeable battery is adjusted. The mobile terminal charging circuit design that the embodiment of the present invention provides is simple, it is ensured that the steady operation of charging circuit, promotes the use time of mobile terminal, and then improves the experience of user.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of the mobile terminal charging circuit that the embodiment of the present invention provides;
Fig. 2 is the circuit diagram of the mobile terminal charging circuit that the embodiment of the present invention provides.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Fig. 1 illustrates the structural principle of the mobile terminal charging circuit that the embodiment of the present invention provides, and for the ease of illustrating, illustrate only the part relevant to the embodiment of the present invention.
In embodiments of the present invention, mobile terminal charging circuit 2 includes charger 1 and rechargeable battery 3, also includes charge control module 21 and microprocessor 22, wherein:
The input of charge control module 21 is connected to the outfan of charger 1, and outfan connects the input of rechargeable battery 3;
The charging of microprocessor 22 controls end and is connected to the control end of charge control module 21, and output control signal controls charge control module 21 and works, and charger 1 charges to rechargeable battery 3.
The voltage detecting end of microprocessor 22 is connected to the input of rechargeable battery 3, and the voltage of described rechargeable battery is detected.
The electric current of microprocessor 22 adjusts end and is connected to the input of charge control module 21, the charging current of rechargeable battery 3 is adjusted by the size of the voltage of the rechargeable battery 3 detected according to voltage detecting end so that rechargeable battery 3 was effectively charged in the different voltage stages.
As a preferred embodiment of the present invention; mobile terminal charging circuit 2 also includes charging protecting module 24; it is connected in the charge circuit of mobile terminal charging circuit 1; when rechargeable battery 3 is full of and charge control module 21 does not turn off in time; cutting off described mobile terminal charging circuit loop, protection battery is not overcharged.
As a preferred embodiment of the present invention, mobile terminal charging circuit 2 also includes charging indicating module 23, is connected to the charged state outfan of microprocessor 22, indicates the charged state of described mobile terminal.
Fig. 2 illustrates the circuit structure of the mobile terminal charging circuit that the embodiment of the present invention provides, and for the ease of illustrating, illustrate only the part relevant to the embodiment of the present invention.
In embodiments of the present invention, charge control module 21 can adopt integrated chip U1 to realize. Integrated chip U1 is low working impedance metal-oxide-semiconductor, and its grid is connected to the charging of microprocessor 22 and controls end, and source electrode is connected to the outfan of charger 1, and drain electrode is connected to the input of rechargeable battery 3.
As one embodiment of the present of invention, mobile terminal charging circuit 2 also includes diode D1 and resistance R1, and the anode of diode D1 is connected to the outfan of charger 1, and negative electrode is connected to the input of charge control module 21 by resistance R1.
Microprocessor 22 includes micro-chip processor U2, resistance R2, resistance R6, resistance R10, resistance R7, wherein:
The power input VCC of micro-chip processor U2 is connected to the negative electrode of diode D1, temperature detection end TS passes through resistance R7 ground connection, charging is controlled end CC and is connected to the negative electrode of diode D1 by resistance R2, charging Enable Pin FB/CE is connected to the negative electrode of diode D1, electric current adjusts end SNS and is connected to the input of charge control module 21, voltage detecting end BAT is connected to the input of rechargeable battery 3, earth terminal VSS ground connection, and charged state outfan STAT connects charging indicating module 23;
Resistance R6 and resistance R10 is sequentially connected in series between the negative electrode and ground of diode D1, and the end that is connected in series of resistance R6 and resistance R10 is connected to the temperature detection end TS of micro-chip processor U2.
In embodiments of the present invention, resistance R10 can adopt negative temperature coefficient resister, for detecting the surface temperature of rechargeable battery 3, and testing result is fed back to micro-chip processor U2, when the surface temperature of rechargeable battery 3 is beyond when presetting scope, the charging of micro-chip processor U2 controls end output control signal, controls charge control module 21 and disconnects, and charger 1 stops charging to rechargeable battery 3. When the surface temperature of rechargeable battery 3 is normal, the charging Enable Pin FB/CE of micro-chip processor U2 obtains electric, starts working, and the charging of micro-chip processor U2 controls end CC and exports control signal and drive metal-oxide-semiconductor U1 to work, and charger 1 starts to charge for rechargeable battery 3. Micro-chip processor U2 according to the situation of the voltage of the voltage detecting end BAT rechargeable battery 3 detected, can adjust end SNS through overcurrent and automatically adjust the size of charging current, thus ensure that rechargeable battery 3 was effectively charged in the different voltage stages.
As one embodiment of the present of invention, microprocessor 22 also includes electric capacity C1 and the electric capacity C2 being connected in parallel with electric capacity C1. One end of electric capacity C1 is connected to the link that the negative electrode of the power input VCC and diode D1 of micro-chip processor U2 is connected, the other end ground connection of electric capacity C1. Electric capacity C1 is used for suppressing voltage pulsation, it is ensured that voltage stabilization. Electric capacity C2 is used for filtering interfering, it is ensured that the reliable and stable work of micro-chip processor U2.
Charging indicating module 23 includes light emitting diode D2, light emitting diode D3, resistance R3, resistance R4, resistance R5, wherein:
Resistance R5 is connected between charged state outfan STAT and the ground of micro-chip processor U2;
The negative electrode of light emitting diode D2 is connected to the charged state outfan STAT of micro-chip processor U2, and anode is connected to the outfan of charger 1 by resistance R3;
The anode of light emitting diode D3 is connected to the charged state outfan STAT of micro-chip processor U2, and negative electrode passes through resistance R4 ground connection.
When rechargeable battery 3 charges normal, the charged state outfan STAT of micro-chip processor U2 is low level, and light emitting diode D2 lights, and light emitting diode D3 extinguishes; When rechargeable battery 3 is fully charged, the charged state outfan STAT of micro-chip processor U2 is high level, and light emitting diode D3 lights, and light emitting diode D2 extinguishes; When the surface temperature of rechargeable battery 3 occurs abnormal, light emitting diode D3 and light emitting diode D2 is glimmer simultaneously.
Charging protecting module 24 includes control chip U3, double; two MOS chip U4, resistance R8, resistance R9 and electric capacity C5, wherein:
The power end VCC of control chip U3 is connected to the input anode B+ of rechargeable battery 3 by resistance R9, power end VCC is connected to the ground end GND of the ground end GND, control chip U3 of control chip U3 and is connected to the input cathode B-of rechargeable battery 3 also by electric capacity C5;
In double; two MOS chip U4 the grid of the first metal-oxide-semiconductor U4A be connected to control chip U3 overcharge control end OC, source ground, source electrode is connected to the current sense input CS of control chip U3 also by resistance R8, and drain electrode is connected in double; two MOS chip U4 the drain electrode of the second metal-oxide-semiconductor U4B;
The grid of the second metal-oxide-semiconductor U4B is connected to the battery of control chip U3 and crosses and put control end OD, and source electrode is connected to the input cathode B-of rechargeable battery 3.
When charging is complete, under normal circumstances, the charging of micro-chip processor U2 controls end output control signal and controls metal-oxide-semiconductor U1 disconnection, stops charging. When rechargeable battery 3 is full of and electric metal-oxide-semiconductor U1 does not turn off in time, being cut off by the charge circuit of rechargeable battery 3 by charging protecting module 24, protection battery is not overcharged, it is ensured that reliable and stable charging.
As one embodiment of the present of invention, mobile terminal charging circuit 2 also includes electric capacity C3 and the electric capacity C4 being connected in parallel with electric capacity C3. One end of electric capacity C3 is connected to the link that charge control module 21 is connected with rechargeable battery 3, the other end ground connection of electric capacity C3. Electric capacity C3 is used for suppressing voltage pulsation, it is ensured that voltage stabilization. Electric capacity C4 is used for filtering interference signals.
The purpose of the embodiment of the present invention also resides in a kind of Mobile terminal charging system of offer, including the mobile terminal charging circuit in above-described embodiment.
In the mobile terminal charging circuit that the embodiment of the present invention provides, by the voltage detecting end of microprocessor, the voltage of described rechargeable battery being detected, the electric current of microprocessor adjusts end and according to the size of the voltage of the described rechargeable battery detected, the size of the charging current of described rechargeable battery is adjusted. The mobile terminal charging circuit design that the embodiment of the present invention provides is simple, it is ensured that the steady operation of charging circuit, promotes the use time of mobile terminal, and then improves the experience of user.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (10)
1. a mobile terminal charging circuit, including charger and rechargeable battery, it is characterised in that described circuit also includes: charge control module and microprocessor;
The input of described charge control module connects the outfan of described charger, and outfan connects the input of described rechargeable battery;
The charging of described microprocessor controls end and is connected to the control end of described charge control module, and output control signal controls the work of described charge control module;
The voltage detecting end of described microprocessor is connected to the input of described rechargeable battery, and the voltage of described rechargeable battery is detected;
The electric current of described microprocessor adjusts end and is connected to the input of described charge control module, and charging current is adjusted by the size of the voltage of the described rechargeable battery detected according to voltage detecting end.
2. mobile terminal charging circuit as claimed in claim 1, it is characterised in that described charge control module includes metal-oxide-semiconductor;
The grid of described metal-oxide-semiconductor is connected to the charging of described microprocessor and controls end, and source electrode is connected to the outfan of described charger, and drain electrode is connected to the input of described rechargeable battery.
3. mobile terminal charging circuit as claimed in claim 1, it is characterised in that described microprocessor includes micro-chip processor U2, resistance R2, resistance R6, resistance R10 and resistance R7;
The power input of described micro-chip processor U2 is connected to the negative electrode of described diode D1, temperature detection end passes through described resistance R7 ground connection, charging is controlled end and is connected to the negative electrode of described diode D1 by described resistance R2, charging Enable Pin is connected to the negative electrode of described diode D1, electric current adjusts end and is connected to the input of described charge control module, and voltage detecting end is connected to the input of described rechargeable battery;
Described resistance R6 and described resistance R10 is sequentially connected in series between negative electrode and the ground of described diode D1, and the end that is connected in series of described resistance R6 and described resistance R10 is connected to the temperature detection end of described micro-chip processor U2.
4. mobile terminal charging circuit as claimed in claim 3, it is characterised in that described microprocessor also includes electric capacity C1, and with the described electric capacity C1 electric capacity C2 being connected in parallel;
The link that the negative electrode of power input and diode D1 that one end of described electric capacity C1 is connected to described micro-chip processor U2 is connected, the other end ground connection of described electric capacity C1.
5. mobile terminal charging circuit as claimed in claim 1, it is characterised in that described mobile terminal charging circuit also includes:
It is connected to the charging protecting module in described mobile terminal charging circuit loop, when described rechargeable battery is full of and described charge control module works, cuts off described mobile terminal charging circuit loop.
6. mobile terminal charging circuit as claimed in claim 5, it is characterised in that described charging protecting module includes control chip U3, double; two MOS chip U4, resistance R8, resistance R9 and electric capacity C5;
The power end of described control chip U3 is connected to the input anode of described rechargeable battery by described resistance R9, be connected to the ground end of described control chip U3 also by described electric capacity C5, the ground end of described control chip U3 is connected to the input cathode of described rechargeable battery;
What in described couple of MOS chip U4, the grid of the first metal-oxide-semiconductor was connected to described control chip U3 overcharges control end, source ground, the source electrode of described first metal-oxide-semiconductor is connected to the current sense input of described control chip U3 also by described resistance R8, and drain electrode is connected in described couple of MOS chip U4 the drain electrode of the second metal-oxide-semiconductor;
The grid of described second metal-oxide-semiconductor is connected to the battery of described control chip U3 and crosses and put control end, and source electrode is connected to the input cathode of described rechargeable battery.
7. mobile terminal charging circuit as claimed in claim 1, it is characterised in that described mobile terminal charging circuit also includes:
It is connected to the charging indicating module of the charged state outfan of described microprocessor, for indicating the charged state of described mobile terminal.
8. mobile terminal charging circuit as claimed in claim 4, it is characterised in that described charging indicating module includes light emitting diode D2, light emitting diode D3, resistance R3, resistance R4 and resistance R5;
Described resistance R5 is connected between charged state outfan and the ground of described microprocessor;
The negative electrode of described light emitting diode D2 is connected to the charged state outfan of described microprocessor, and anode is connected to the outfan of described charger by described resistance R3;
The anode of described light emitting diode D3 is connected to the charged state outfan of described microprocessor, and negative electrode passes through described resistance R4 ground connection.
9. mobile terminal charging circuit as claimed in claim 2, it is characterised in that described mobile terminal charging circuit also includes electric capacity C3, and with the described electric capacity C3 electric capacity C4 being connected in parallel;
One end of described electric capacity C3 is connected to the link that described metal-oxide-semiconductor is connected, the other end ground connection of described electric capacity C3 with battery.
10. a Mobile terminal charging system, it is characterised in that include the mobile terminal charging circuit as described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063292.2A CN105634062A (en) | 2016-01-31 | 2016-01-31 | Charging circuit and system for mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610063292.2A CN105634062A (en) | 2016-01-31 | 2016-01-31 | Charging circuit and system for mobile terminal |
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| Publication Number | Publication Date |
|---|---|
| CN105634062A true CN105634062A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610063292.2A Pending CN105634062A (en) | 2016-01-31 | 2016-01-31 | Charging circuit and system for mobile terminal |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107569A1 (en) * | 2016-12-16 | 2018-06-21 | 宇龙计算机通信科技(深圳)有限公司 | Charging device and charging method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308118A (en) * | 1995-05-08 | 1996-11-22 | Matsushita Electric Ind Co Ltd | Battery charger |
| JPH10210677A (en) * | 1997-01-20 | 1998-08-07 | Matsushita Electric Ind Co Ltd | Charger |
| CN101741124A (en) * | 2010-01-25 | 2010-06-16 | 海洋王照明科技股份有限公司 | Battery charging circuit and power supply device |
| CN103762691A (en) * | 2014-01-28 | 2014-04-30 | 广东欧珀移动通信有限公司 | Battery charging device and battery charging protection control method |
| CN105262178A (en) * | 2015-11-06 | 2016-01-20 | 来安县信隆机械科技有限公司 | Electronic equipment power circuit and electronic equipment |
-
2016
- 2016-01-31 CN CN201610063292.2A patent/CN105634062A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08308118A (en) * | 1995-05-08 | 1996-11-22 | Matsushita Electric Ind Co Ltd | Battery charger |
| JPH10210677A (en) * | 1997-01-20 | 1998-08-07 | Matsushita Electric Ind Co Ltd | Charger |
| CN101741124A (en) * | 2010-01-25 | 2010-06-16 | 海洋王照明科技股份有限公司 | Battery charging circuit and power supply device |
| CN103762691A (en) * | 2014-01-28 | 2014-04-30 | 广东欧珀移动通信有限公司 | Battery charging device and battery charging protection control method |
| CN105262178A (en) * | 2015-11-06 | 2016-01-20 | 来安县信隆机械科技有限公司 | Electronic equipment power circuit and electronic equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018107569A1 (en) * | 2016-12-16 | 2018-06-21 | 宇龙计算机通信科技(深圳)有限公司 | Charging device and charging method |
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Application publication date: 20160601 |