CN105846490A - Mobile terminal charging protection circuit and mobile terminal - Google Patents
Mobile terminal charging protection circuit and mobile terminal Download PDFInfo
- Publication number
- CN105846490A CN105846490A CN201610155695.XA CN201610155695A CN105846490A CN 105846490 A CN105846490 A CN 105846490A CN 201610155695 A CN201610155695 A CN 201610155695A CN 105846490 A CN105846490 A CN 105846490A
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- Prior art keywords
- voltage
- mobile terminal
- charging
- module
- control module
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention is suitable for the mobile terminal field and provides a mobile terminal charging protection circuit and a mobile terminal. The mobile terminal comprises a charging control unit and the mobile terminal charging protection circuit. The mobile terminal charging protection circuit comprises a master control module and a charging protection unit. The charging protection unit comprises a voltage detection module, a driving module, a power supply control module and a charging voltage control module. In an embodiment of the invention, an output voltage of the charging control unit of the mobile terminal is rapidly increased and exceeds a preset voltage, the voltage detection module feeds the output voltage back to a control terminal of the master control module, the charging voltage control module reduces a voltage rise rate of the output voltage on the control terminal and the charging control unit reduces the voltage rise rate of the output voltage so that mobile terminal damages caused by a transient voltage during a charging process of the mobile terminal are avoided and a usage experience of a user is increased.
Description
Technical field
The invention belongs to field of mobile terminals, particularly relate to a kind of mobile terminal charge protector and mobile terminal.
Background technology
Mobile terminal has the history of decades as simple communication equipment with Mobile Communication Development.Opened from 2007
Beginning, intellectuality has caused mobile terminal gene mutation, fundamentally changes the terminal tradition location as mobile network's tip.
Mobile intelligent terminal is almost changed into crucial entrance and the main innovation platform of Internet service between a flash, new media,
The most important hinge of ecommerce and information service platform, Internet resources, mobile network resource and environmental interaction resource, its behaviour
Make system and processor chips even become the strategic high ground of current whole ICT industry.What mobile intelligent terminal caused overturns
Property change and opened the prelude of mobile Internet industry development, open a new technical industry cycle.Along with intelligent movable
The sustainable development of terminal, its power of influence will radio, TV and the Internet (PC) shoulder to shoulder, become the 4th infiltration in human history
Extensively, universal rapidly, affect huge, deeply to the end product of human society life every aspect.
In mobile terminal charging process, owing to charging voltage exists moment big voltage, stablizing of charging process can be affected
Property, cause mobile terminal to damage, reduce the experience of user.
Summary of the invention
The purpose of the embodiment of the present invention is to provide a kind of mobile terminal charge protector, it is intended to solve existing mobile whole
End instantaneous pressure in charging process causes mobile terminal to damage, the problem reducing user's experience.
The embodiment of the present invention is achieved in that a kind of mobile terminal charge protector, described mobile terminal charger
Protection circuit includes main control module and charge protection unit, the charging control unit of the output termination mobile terminal of described main control module
Control end, described charge protection unit includes:
Voltage detection module, driving module, energy supply control module and charging voltage control module；
The detection of described voltage detection module terminates the outfan of described charging control unit, the output of described voltage detection module
Terminate the input of described driving module, the first outfan of described driving module connect simultaneously described main control module control end and
Charging voltage control module, the second output of described driving module terminates the control end of described energy supply control module, described power supply
The input termination power of control module, the output of described energy supply control module terminates the power end of described main control module；
When the output voltage of described charging control unit quickly increases to over predeterminated voltage, described voltage detection module is by described
Output voltage reduces described control end by driving module feedback to the control end of main control module, described charging voltage control module
On the voltage increase rate of output voltage, it is defeated that described master control module controls charging control unit reduces described charging control unit
Going out the voltage increase rate of voltage, described voltage detection module output over-voltage protection signal controls mould by driving module to power supply
The control end of block, described energy supply control module turns off the power supply of described main control module, and described charging control unit stops charging.
The another object of the embodiment of the present invention is to provide a kind of mobile terminal, and it is single that described mobile terminal includes that charging controls
First and above-mentioned mobile terminal charge protector.
In embodiments of the present invention, when the output voltage of charging control unit quickly increases to over predeterminated voltage, voltage
Output voltage is fed back to the control end of main control module by detection module, and charging voltage control module reduces the output electricity controlled on end
The voltage increase rate of pressure, charging control unit reduces the voltage increase rate of its output voltage, it is to avoid mobile terminal is in charging
During cause mobile terminal to damage due to transient voltage, promote the experience of user.
Accompanying drawing explanation
Fig. 1 is the structure chart of the mobile terminal that the embodiment of the present invention provides；
Fig. 2 is the exemplary circuit figure of the mobile terminal 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 clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, and
It is not used in the restriction present invention.
Fig. 1 shows the structure of the mobile terminal that the embodiment of the present invention provides, and for convenience of description, illustrate only and this
The part that bright embodiment is relevant.
Mobile terminal includes charging control unit 100 and mobile terminal charge protector, mobile terminal charge protection
Circuit includes main control module 200 and charge protection unit 300, the control of the output termination charging control unit 100 of main control module 200
End processed, charge protection unit 300 includes:
Voltage detection module 301, driving module 302, energy supply control module 303 and charging voltage control module 304；
The outfan of the detection termination charging control unit 100 of voltage detection module 301, the outfan of voltage detection module 301
Connect the input driving module 302, drive the first outfan of module 302 to connect control end and the charging of main control module 200 simultaneously
Voltage control module 304, drives the control end of the second output termination energy supply control module 303 of module 302, energy supply control module
The input termination power of 303, the power end of the output termination main control module 200 of energy supply control module 303；
When the output voltage of charging control unit 100 quickly increases to over predeterminated voltage, voltage detection module 301 will output electricity
Pressing by driving module 302 to feed back to the control end of main control module 200, charging voltage control module 304 reduces and controls on end
The voltage increase rate of output voltage, main control module 200 controls charging control unit 100 and reduces charging control unit 100 and export
The voltage increase rate of voltage, voltage detection module 301 output over-voltage protection signal controls mould by driving module 302 to power supply
The control end of block 303, energy supply control module 303 turns off the power supply of main control module 200, and charging control unit 100 stops charging.
Fig. 2 shows the exemplary circuit structure of the mobile terminal that the embodiment of the present invention provides, and for convenience of description, only illustrates
The part relevant to the embodiment of the present invention.
As one embodiment of the invention, voltage detection module 301 is voltage checking chip U1, the of voltage checking chip U1
One input IN1 and the second outfan IN2 is respectively the test side of voltage detection module 301, the output of voltage checking chip U1
End OUT is the outfan of voltage detection module 301.
As one embodiment of the invention, driving module 302 is photoelectrical coupler U2, and photoelectrical coupler U2 includes a luminescence two
Pole pipe, the first phototriode and the second phototriode, the anode of light emitting diode connects+5V power supply, the moon of light emitting diode
Extremely driving the input of module 302, the grounded emitter of the first phototriode, the current collection of the first phototriode extremely drives
First outfan of dynamic model block 302, the colelctor electrode of the second phototriode connects power supply VCC, the emitter stage of the second phototriode
For driving the second outfan of module 302.
As one embodiment of the invention, energy supply control module 303 includes audion Q2 and Zener diode ZD1, audion
The input of the current collection of Q2 extremely energy supply control module 303, the output of the transmitting of audion Q2 extremely energy supply control module 303
End, the base stage of audion Q2 is the negative electrode controlling termination Zener diode ZD1 of energy supply control module 303, Zener diode ZD1
Plus earth.
As one embodiment of the invention, charging voltage control module 304 includes Zener diode ZD2, resistance R3 and two poles
Pipe D3, the negative electrode of Zener diode ZD2 connects the first outfan driving module 302, and the anode of Zener diode ZD2 passes through resistance
R3 connects the anode of diode D3, the minus earth of diode D3.
As one embodiment of the invention, main control module 200 is microprocessor U3 and metal-oxide-semiconductor Q1, the control of microprocessor U3
End CTRL is the control end of main control module 200, the power end that power end VCC is main control module 200 of microprocessor U3, micro-process
The outfan OUT of device U3 connects the grid of metal-oxide-semiconductor Q1, the source ground of metal-oxide-semiconductor Q1, and the drain electrode of metal-oxide-semiconductor Q1 is main control module 200
Outfan.
As one embodiment of the invention, charging control unit 100 includes transformator T1, commutation diode D1 and rectification two pole
Pipe D2, transformator T1 include armature winding, the first secondary windings and second subprime winding, and the first end of armature winding is charging control
The input of unit 100 processed, the control end that the second end is charging control unit 100 of armature winding, the of the first secondary windings
The anode of one termination commutation diode D1, the negative electrode of commutation diode D1 is the output termination voltage inspection of charging control unit 100
Survey the first input end IN1 of chip U1, the anode of the first termination commutation diode D2 of second subprime winding, commutation diode D2
Negative electrode be charging control unit 100 output termination voltage checking chip U1 the second outfan IN2, the first secondary windings
Second end of the second end and second subprime winding ground connection simultaneously.
It addition, the predeterminated voltage of overvoltage protection can be adjusted by changing the parameter value of Zener diode ZD2 and resistance R3
Joint, first phototriode of photoelectrical coupler U2 when the value of Zener diode ZD2 is normally to work according to mobile terminal
Colelctor electrode carrys out value, and resistance R3 is used to revise the temperature drift of Zener diode ZD2 and discreteness, by above tune
Whole, the scope of predeterminated voltage can control in the range of national standard and INTEL standard.
Illustrating the operation principle of the embodiment of the present invention below, the output voltage at transformator T1 quickly increases to over
During predeterminated voltage, the output voltage of voltage checking chip U1 detection transformator T1, and feed back to micro-process through photoelectrical coupler U2
The collector voltage of first phototriode of device U3, photoelectrical coupler U2 raises suddenly, has exceeded the steady of Zener diode ZD2
Pressure value, just there is avalanche breakdown in Zener diode ZD2, electric current flows into diode D3 by resistance R3, then flows into ground.Due to together
Receive the clamped effect of diode ZD2 and general-purpose diode D3, the collector voltage of first phototriode of photoelectrical coupler U2
Cannot raise moment, i.e. reduce the voltage increase rate of collector voltage, microprocessor U3 controls transformator T1 and reduces its output
The voltage increase rate of voltage, at this moment, voltage checking chip U1 starts to perform overvoltage protection, the outfan of voltage checking chip U1
OUT output high impedance, the light emitting diode dead electricity of photoelectrical coupler U2, second phototriode of photoelectrical coupler U2 is owing to losing
Having gone the driving of base stage to close, the base current simultaneously provided to audion Q2 by power supply VCC is also because of photoelectrical coupler U2
Closedown and disappear, audion Q2, owing to without base current, being also switched off the power supply VCC power supply to microprocessor U3, connects
Mobile terminal and stop charging.
In embodiments of the present invention, when the output voltage of charging control unit quickly increases to over predeterminated voltage, voltage
Output voltage is fed back to the control end of main control module by detection module, and charging voltage control module reduces the output electricity controlled on end
The voltage increase rate of pressure, charging control unit reduces the voltage increase rate of its output voltage, it is to avoid mobile terminal is in charging
During cause mobile terminal to damage due to transient voltage, promote the experience of user.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all essences in the present invention
Any amendment, equivalent and the improvement etc. made within god and principle, should be included within the scope of the present invention.
Claims (8)
1. a mobile terminal charge protector, it is characterised in that described mobile terminal charge protector includes master control mould
Block and charge protection unit, the control end of charging control unit of the output termination mobile terminal of described main control module, described in fill
Electric protection unit includes:
Voltage detection module, driving module, energy supply control module and charging voltage control module；
The detection of described voltage detection module terminates the outfan of described charging control unit, the output of described voltage detection module
Terminate the input of described driving module, the first outfan of described driving module connect simultaneously described main control module control end and
Charging voltage control module, the second output of described driving module terminates the control end of described energy supply control module, described power supply
The input termination power of control module, the output of described energy supply control module terminates the power end of described main control module；
When the output voltage of described charging control unit quickly increases to over predeterminated voltage, described voltage detection module is by described
Output voltage reduces described control end by driving module feedback to the control end of main control module, described charging voltage control module
On the voltage increase rate of output voltage, it is defeated that described master control module controls charging control unit reduces described charging control unit
Going out the voltage increase rate of voltage, described voltage detection module output over-voltage protection signal controls mould by driving module to power supply
The control end of block, described energy supply control module turns off the power supply of described main control module, and described charging control unit stops charging.
2. mobile terminal charge protector as claimed in claim 1, it is characterised in that described voltage detection module is voltage
Detection chip, the first input end of described voltage checking chip and the second outfan be respectively the test side of voltage detection module,
The outfan of described voltage checking chip is the outfan of voltage detection module.
3. mobile terminal charge protector as claimed in claim 1, it is characterised in that described driving module is photoelectric coupling
Device, described photoelectrical coupler includes a light emitting diode, the first phototriode and the second phototriode, described light-emitting diodes
The anode of pipe connects power supply, and the negative electrode of described light emitting diode is the input of described driving module, described first phototriode
Grounded emitter, the first outfan of the current collection the most described driving module of described first phototriode, described second light
The colelctor electrode of electricity audion connects power supply, the second outfan of the transmitting the most described driving module of described second phototriode.
4. mobile terminal charge protector as claimed in claim 1, it is characterised in that described energy supply control module includes three
The input of the current collection extremely energy supply control module of pole pipe Q2 and Zener diode ZD1, described audion Q2, described audion Q2
The outfan of transmitting extremely energy supply control module, the control that base stage the is energy supply control module termination Zener of described audion Q2
The negative electrode of diode ZD1, the plus earth of described Zener diode ZD1.
5. mobile terminal charge protector as claimed in claim 1, it is characterised in that described charging voltage control module bag
Including Zener diode ZD2, resistance R3 and diode D3, the negative electrode of described Zener diode ZD2 connects the first of described driving module
Outfan, the anode of described Zener diode ZD2 connects the anode of diode D3 by resistance R3, and the negative electrode of described diode D3 connects
Ground.
6. mobile terminal charge protector as claimed in claim 1, it is characterised in that described main control module is microprocessor
With metal-oxide-semiconductor Q1, the control end that control end is main control module of described microprocessor, the power end of described microprocessor is master control mould
The power end of block, the grid of the output described metal-oxide-semiconductor Q1 of termination of described microprocessor, the source ground of described metal-oxide-semiconductor Q1, described
The outfan that drain electrode is main control module of metal-oxide-semiconductor Q1.
7. a mobile terminal, it is characterised in that described mobile terminal includes charging control unit and as claim 1-6 is appointed
One described mobile terminal charge protector.
8. mobile terminal as claimed in claim 7, it is characterised in that described charging control unit includes transformator, rectification two
Pole pipe D1 and commutation diode D2, described transformator includes armature winding, the first secondary windings and second subprime winding, described at the beginning of
The input that first end is charging control unit of level winding, the control that the second end is charging control unit of described armature winding
End, the anode of the first termination commutation diode D1 of described first secondary windings, the negative electrode of described commutation diode D1 is charging
The outfan of control unit, the anode of the first termination commutation diode D2 of described second subprime winding, described commutation diode
The negative electrode of D2 is the outfan of charging control unit, the second end of described first secondary windings and the second end of second subprime winding
Ground connection simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155695.XA CN105846490A (en) | 2016-03-20 | 2016-03-20 | Mobile terminal charging protection circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610155695.XA CN105846490A (en) | 2016-03-20 | 2016-03-20 | Mobile terminal charging protection circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105846490A true CN105846490A (en) | 2016-08-10 |
Family
ID=56587452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610155695.XA Pending CN105846490A (en) | 2016-03-20 | 2016-03-20 | Mobile terminal charging protection circuit and mobile terminal |
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| Country | Link |
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| CN (1) | CN105846490A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109873470A (en) * | 2019-01-18 | 2019-06-11 | 深圳欣旺达智能科技有限公司 | Low internal resistance battery of mobile phone protective device and discharge protection circuit, charge protector |
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| CN102340129A (en) * | 2010-07-23 | 2012-02-01 | 中国长城计算机深圳股份有限公司 | Switching power supply and overvoltage protection circuit thereof |
| CN103368144A (en) * | 2012-04-06 | 2013-10-23 | 深圳富泰宏精密工业有限公司 | Overvoltage protection circuit |
| US20140043007A1 (en) * | 2012-08-07 | 2014-02-13 | Huawei Device Co., Ltd. | Power supply apparatus and method, and user equipment |
| CN103715748A (en) * | 2012-09-29 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit |
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2016
- 2016-03-20 CN CN201610155695.XA patent/CN105846490A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102340129A (en) * | 2010-07-23 | 2012-02-01 | 中国长城计算机深圳股份有限公司 | Switching power supply and overvoltage protection circuit thereof |
| CN101916983A (en) * | 2010-08-25 | 2010-12-15 | 海洋王照明科技股份有限公司 | Battery protection circuit and portable light |
| CN103368144A (en) * | 2012-04-06 | 2013-10-23 | 深圳富泰宏精密工业有限公司 | Overvoltage protection circuit |
| US20140043007A1 (en) * | 2012-08-07 | 2014-02-13 | Huawei Device Co., Ltd. | Power supply apparatus and method, and user equipment |
| CN103715748A (en) * | 2012-09-29 | 2014-04-09 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109873470A (en) * | 2019-01-18 | 2019-06-11 | 深圳欣旺达智能科技有限公司 | Low internal resistance battery of mobile phone protective device and discharge protection circuit, charge protector |
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Application publication date: 20160810 |