CN104037734B - Charging protection device for intelligent terminal, and intelligent terminal - Google Patents
Charging protection device for intelligent terminal, and intelligent terminal Download PDFInfo
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- CN104037734B CN104037734B CN201310068019.5A CN201310068019A CN104037734B CN 104037734 B CN104037734 B CN 104037734B CN 201310068019 A CN201310068019 A CN 201310068019A CN 104037734 B CN104037734 B CN 104037734B
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- 230000000903 blocking effect Effects 0.000 claims abstract description 14
- 239000004065 semiconductor Substances 0.000 claims description 6
- 230000037361 pathway Effects 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 2
- 150000004706 metal oxides Chemical class 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000001012 protector Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000003071 parasitic effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Classifications
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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
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
- H01L27/02—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having potential barriers; including integrated passive circuit elements having potential barriers
- H01L27/0203—Particular design considerations for integrated circuits
- H01L27/0248—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection
- H01L27/0251—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices
- H01L27/0266—Particular design considerations for integrated circuits for electrical or thermal protection, e.g. electrostatic discharge [ESD] protection for MOS devices using field effect transistors as protective elements
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
-
- 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
- H02J7/00308—Overvoltage protection
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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
- H02J7/00302—Overcharge protection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Protection Of Static Devices (AREA)
Abstract
The invention discloses a charging protection device for an intelligent terminal, and an intelligent terminal. The charging protection device is connected between a charger and a charging port of the intelligent terminal, and comprises: an anti-reverse plug protection module, a voltage-dividing and routing module, and an end switch module. The anti-reverse plug protection module is used for blocking an output end of the charger and the voltage-dividing and routing module when the output end of the charger is reversely plugged. The voltage-dividing and routing module is used for routing to a blocking circuit of the end switch module and disconnecting a charging closed circuit when the charging closed circuit is at an overvoltage state. When the output end of the charger is reversely plugged or the charging closed circuit is at the overvoltage state, the charging protection device disconnects the charging closed circuit to realize anti-reverse plug protection, overvoltage protection and anti-intrusion protection, and otherwise, the charging protection device connects the charging closed circuit to realize normal charging. By using the apparatus and the intelligent terminal provided by the present invention, the cost can be saved, the security and the reliability of charging of the intelligent terminal can be improved, and the service life of a battery of the intelligent terminal and even the service life of the intelligent terminal itself can be prolonged.
Description
Technical field
The present invention relates to intelligent terminal's communication technology, more particularly to a kind of intelligent terminal's charge protection device and intelligence are eventually
End.
Background technology
As developing rapidly for communication technology, intelligent terminal Touch, smart mobile phone, panel computer etc. are gradually able to
Popularization, and it is very popular in the world.And the use of the common problem of these intelligent terminal is its internal cell need to be entered
Row charges.
For the consideration of favorable compatibility, the charger interface of most intelligent terminal is both designed as USB interface, and this may
Cause user when using different intelligent end product, each charger is mutually used or misused.And for different intelligent terminal, its
Charger output voltage is different.If (i.e. charger output voltage is whole beyond intelligence to occur overvoltage in charging process
The range of nominal tension of end-cell) or anti-plug (i.e. charger and intelligent terminal's reverse polarity connection), or even in anti-plug with electric current
Pour in down a chimney (hereinafter referred to as pour in down a chimney) phenomenon, these can cause charger output voltage exception, so as to damage charging path, or affect
The battery even service life of intelligent terminal.
Prior art one is that diode is added in charging path, as shown in Figure 1.Wherein, output electricity of the VIN for charger
Pressure, VOUT is the output voltage of the charge protector, and D1 is diode.This circuit can simple realization inverse plugging, reverse-filling
Defencive function, but have the following disadvantages：One is the presence due to diode drop so that the actual charging voltage of intelligent terminal is remote
Less than charger output voltage, charge efficiency is reduced；Two is, when occurring overvoltage in charging process, do not possess overvoltage protection energy
Power, so as to cause the damage to intelligent terminal.
Prior art two be by adding special overvoltage protection chip realizing the protection to intelligent terminal's charging port,
As shown in Figure 2.Wherein, output voltages of the VIN for charger, VOUT is the output voltage of the charge protector.This circuit
Achievable over-voltage protecting function, but additional overvoltage protection chip, can improve cost and not possess inverse plugging, reverse-filling protection work(
Energy.
The content of the invention
In view of this, present invention is primarily targeted at providing a kind of intelligent terminal's charge protection device and intelligent terminal,
Inverse plugging protection, overvoltage protection and reverse-filling defencive function are provided simultaneously with, safety and reliability that intelligent terminal charges is improved,
Extend intelligent terminal's battery or even the service life of itself.
To reach above-mentioned purpose, the present invention provides a kind of intelligent terminal's charge protection device, and described device includes：Go here and there successively
The inverse plugging protection module that connects, partial pressure route selection module, end switch module, the end switch module include blocking circuit and choosing
Circuit passband；Wherein：
Inverse plugging protection module, is arranged between charger outfan and partial pressure route selection module, for exporting in charger
During the anti-plug of end, charger outfan and partial pressure route selection module are blocked；
Partial pressure route selection module, in charging path overvoltage, being routed to the blocking circuit of end switch module, disconnection is filled
Electric pathway；In the non-anti-plug of charger outfan and charging path not overvoltage when, be routed to the gating circuit of end switch module, connect
Logical charging path.
Preferably, the end switch module, is additionally operable to provide reverse-filling protection for charging path.
The inverse plugging protection module includes the 3rd diode, and the anode of the 3rd diode is connected to charger outfan,
Negative electrode is connected to division module.
Preferably, the partial pressure route selection module includes first resistor, second resistance, 3rd resistor, the oxidation of the first N-type metal
Thing semiconductor N metal-oxide-semiconductor, the second NMOS tube and the 3rd P-type mos PMOS, wherein first resistor one end connect
To the outfan of inverse plugging protection module, the other end is connected to one end of second resistance, and it is electric that second resistance one end is connected to first
Resistance, other end ground connection, 3rd resistor one end is connected to the outfan of inverse plugging protection module, the leakage of the other end and the first NMOS tube
The grid connection of pole, the grid of the second NMOS tube and the 3rd PMOS, it is electric that the grid of the first NMOS tube is connected to first, second
Between resistance, source ground, the drain electrode of the second NMOS tube are connected with the drain electrode of the 3rd PMOS, source ground, the 3rd PMOS
Source electrode is connected to charger outfan.
Preferably, the end switch module includes the first PMOS and the second PMOS, the grid of first, second PMOS
Pole is connected to the outfan of partial pressure route selection module, and the source electrode of first, second PMOS is connected to each other, the drain electrode of the first PMOS
Charger outfan is connected to, the drain electrode of the second PMOS is connected to the charging port of intelligent terminal.
Preferably, first PMOS and the second PMOS, respectively comprising first, second diode, first, second 2
Back-to-back mated condition of the pole pipe in reverse-filling.
The partial pressure route selection module is routed to the blocking circuit of end switch module in charging path overvoltage, and disconnection is filled
Electric pathway, including：
During charging path overvoltage, first, second electric resistance partial pressure turns on the first NMOS tube, the second NMOS tube, the 3rd PMOS
Tube grid is pulled to low level, the cut-off of the second NMOS tube, the conducting of the 3rd PMOS, pressure drop between the grid of first, second PMOS
It is turned off first, second PMOS.
Preferably, the partial pressure route selection module in the non-anti-plug of charger outfan and charging path not overvoltage when, be routed to
The gating circuit of end switch module, connects charging path, including：
In the non-anti-plug of charger outfan and charging path not overvoltage when, the 3rd diode current flow, first, second resistance point
Pressure ends the first NMOS tube, and the drain electrode of the first NMOS tube is high level, the voltage at 3rd resistor turns on the second NMOS tube,
3rd PMOS is ended, and the grid of first, second PMOS is pulled to low level, and first, second PMOS is both turned on.
Additionally, the present invention also provides a kind of intelligent terminal, charge protection as above in the intelligent terminal, is provided with
Device.
Preferably, the intelligent terminal be personal digital assistant PDA, PC, panel computer, mobile phone, videophone,
Game machine, electron album, video conference terminal.
Technical solution of the present invention causes inverse plugging protection module, partial pressure route selection module and end switch module in charge protection
Each self-applying is effectively played in device, the control charged to intelligent terminal is realized, and in anti-plug, overvoltage and guarantor when pouring in down a chimney
Shield.Compared with prior art, technical solution of the present invention has saved cost, improves safety and the reliability of intelligent terminal's charging
Property, extend the service life of intelligent terminal's battery or even intelligent terminal.
Description of the drawings
Charge protectors of the Fig. 1 for prior art one；
Charge protectors of the Fig. 2 for prior art two；
Structure connection figures of the Fig. 3 for the charge protection device of the embodiment of the present invention；
Charging flow schematic diagrams of the Fig. 4 for the charge protection device of the embodiment of the present invention；
Charge protection device corresponding circuits figures of the Fig. 5 for the embodiment of the present invention；
Charging flow schematic diagrams of the Fig. 6 for the charge protection device corresponding circuits of the embodiment of the present invention.
Specific embodiment
Lower mask body is described in detail to the present invention in conjunction with the drawings and the specific embodiments.
Structure connection figures of the Fig. 3 for the charge protection device of the embodiment of the present invention, as shown in figure 3, the charge protection device
Be connected between charger outfan 31 and intelligent terminal's charging port 35, including the inverse plugging protection module 32 being sequentially connected in series,
Partial pressure route selection module 33 and end switch module 34, wherein：
Inverse plugging protection module 32, is arranged between charger outfan 31 and partial pressure route selection module 33, for charging
When device is with intelligent terminal's reverse polarity connection (i.e. anti-plug), directly blocking and the connection of partial pressure route selection module 33, lead to due to now charging
Road is blocked, and 33 no current of partial pressure route selection module is flowed through, therefore is not in overvoltage；And in non-anti-plug, connect inverse plugging and protect
The connection of shield module 32 and partial pressure route selection module 33.
Partial pressure route selection module 33, is arranged between inverse plugging protection module 32 and end switch module 34, for charging
Device output voltage is routed to end switch by partial pressure effect beyond during the range of nominal tension (i.e. the overvoltage) of intelligent terminal's battery
The blocking circuit of module 34, disconnects charging path；In the non-anti-plug of charger outfan and charging path not overvoltage when, again by
Partial pressure effect is routed to the gating circuit of end switch module 34, connects charging path.As can be seen here, the effect of partial pressure is to lead to
Routing is crossed, the abnormal charge protection of end switch module 34 pairs or the controllability for charging normal finally is realized.
End switch module 34, is arranged between partial pressure route selection module 33 and intelligent terminal's charging port 35.End switch
Module 34 includes blocking circuit and gating circuit, for the above-mentioned feelings according to inverse plugging protection module 32, partial pressure route selection module 33
Condition, finally realizes the open or closed of charging path.When the overvoltage of charger outfan non-anti-plug charging path, partial pressure routing
Module 33 is routed to the blocking circuit of end switch module 34, and charging path disconnects；Conversely, work as the non-anti-plug of charger outfan and
When charging path is not over-pressed, charging path is connected.Additionally, the architectural feature of the module also provides reverse-filling protection for charging path
Function.
Charging flow schematic diagrams of the Fig. 4 for the charge protection device of the embodiment of the present invention, as shown in figure 4, the present invention is implemented
The charging flow of the charge protection device of example is comprised the following steps：
Step 401：After charger connects intelligent terminal by charge protection device, charge protection device is to filling first
The normality of electrical equipment is checked, including anti-plug and overvoltage.
Step 402：Judge charger whether anti-plug.If anti-plug, execution step 404；Conversely, execution step 403；
Step 403：Judge whether charger is over-pressed.If over-pressed, execution step 404；Conversely, execution step 405；
Step 404：Charge protection device disconnects charging path；
Step 405：Charge protection device connects charging path, and execution is charged normal.
Charge protection device corresponding circuits figures of the Fig. 5 for the embodiment of the present invention, as shown in figure 5, outputs of the VIN for charger
Voltage, VOUT are the output voltage of the charge protector.
Inverse plugging protection module 51 includes the 3rd diode D3, and its anode connects charger outfan, and negative electrode is connected to partial pressure
Module.
Partial pressure route selection module 52 includes first resistor R1, second resistance R2,3rd resistor R3, the first N-type metal-oxide
The connection of semiconductor N metal-oxide-semiconductor N1, the second NMOS tube N2 and the 3rd P-type mos PMOS P3, wherein R1 one end is anti-
The outfan of anti-plug protection module, another one end for being connected to R2, R2 one end connection R1, other end ground connection, the connection of R3 one end are anti-
The outfan of anti-plug protection module, the other end are connected with the grid of the drain electrode of N1, the grid of N2 and P3, and the grid of N1 is connected to
Between R1, R2, source ground, the drain electrode of N2 are connected with the drain electrode of P3, source ground, and the source electrode of P3 is connected to charger output
End.
End switch module 53 includes the first PMOS P1 and the second PMOS P2, P1, P2 constitute the blocking circuit and
Gating circuit, the grid of P1, P2 are connected to the outfan of partial pressure route selection module 52, and the source electrode of P1, P2 is connected to each other, the drain electrode of P1
Connection charger outfan, the drain electrode of P2 are connected to the charging port of intelligent terminal.When occur high level make P1, P2 end when, VIN
Path is not formed between VOUT, therefore claims blocking circuit；When low level occur and turning on P1, P2, formed between VIN and VOUT logical
Road, therefore claim gating circuit.
Structure as shown in Figure 5 understands that N2, P3 composition push-pull configuration, is made by R1, R2 partial pressure in partial pressure route selection module 52
Obtain N2, P3 cut-off of the push-pull configuration or turn on, then the cut-off that P1, P2 in end switch module 53 are further realized by routing
Or conducting, finally realize intelligent terminal's exception charge protection or charge normal：When P1, P2 end, without logical between VIN and VOUT
Road, charger are not charged；When P1, P2 are turned on, path between VIN and VOUT, is formed, the outfan of charger connects intelligence
The charging port of terminal, is charged.Additionally, the negative electrode of parasitic diode D1, D2 of P1, P2 is connected together, in back-to-back
State, to ensure that path completely cuts through between VIN and VOUT, realizes inverse plugging, reverse-filling defencive function when P1 and P2 ends.
In partial pressure route selection module 52, reasonable selection R1, R2 so that only in the non-anti-plug of charger outfan and charging path
Not during overvoltage, the partial pressure of R2 is less than the conduction voltage drop of N1, it is assumed that the voltage of X points is VX, so as to realize VXOn or off to N1
Control.Further, since there is parasitic capacitance between the source and drain of N1, between N2 grid source, also there are parasitic capacitance, R3 and the two electric capacity
Composition RC filter circuits, so as to when momentary spike occurs in charger voltage, the voltage be filtered, and then prevent over-pressed error detection
Generation, further increase the reliability of charge protector.
It will be appreciated by those skilled in the art that the inverse plugging protection module in the charge protection device of the embodiment of the present invention
51st, partial pressure route selection module 52 and end switch module 53 have various circuit implementations, and Fig. 5 illustrate only a kind of realization electricity
Road, should not be construed as the restriction to technical solution of the present invention.The resistance of resistance in foregoing circuit, can fill according to above-mentioned charge protection
The corresponding circuits put need blanking voltage and need the size of conducting voltage and set, and the present invention does not limit its concrete value.
Charging flow schematic diagrams of the Fig. 6 for the charge protection device corresponding circuits of the embodiment of the present invention, with reference to Fig. 5 and
Fig. 6 gives and describes in detail.
Charge normal implementation process：After charger connects intelligent terminal by charge protector, if charger is defeated
When going out the non-anti-plug in end and not over-pressed charging path, from the above mentioned, D3 conductings, Jing after R1, R2 partial pressure, VXConducting pressure less than N1
Drop, then N1 cut-off, so as to N1 drain electrode be high level, the voltage V of Y points at R3YFor VIN-VD(VDFor the conduction voltage drop of D3), from
And N2 conductings, P3 cut-offs, so, the grid of P1, P2 is pulled to low level and turns on, charger outfan VIN and intelligent terminal
Charging port VOUT between form path, normal charge function is performed to intelligent terminal.
Inverse plugging and the implementation process of reverse-filling protection：When charger by charge protector connect intelligent terminal it
Afterwards, if charger anti-plug, VIN is negative pressure, then D3 reversely ends, and VIN to earth terminal can not form path, then X points, Y points, Z points
Voltage is GND, and N1, N2 and P3 are turned off, and P1, P2 are also switched off；And lean against as parasitic diode D1, D2 of P1, P2 are in
Back of the body state, therefore during P1, P2 end, electric current will not be formed between VIN and VOUT and pours in down a chimney path, so as to the embodiment of the present invention
Charge protection device corresponding circuits while inverse plugging defencive function is realized to charger, it also avoid electric current occur pouring in down a chimney
Phenomenon, realizes the protection to intelligent terminal's charging port.
The implementation process of overvoltage protection：After charger connects intelligent terminal by charge protector, if charger
Overvoltage, from the above mentioned, D3 conductings, after R1, R2 partial pressure, VXMore than the conduction voltage drop of N1, at this moment N1 conductings, then Y point voltages VY
Be pulled low, end N2, P3 conducting, so as to P1, P2 source electrode and grid between pressure drop be approximately equal to VIN, so as to P1, P2 end, VIN
The nonpassage between VOUT, realizes over-voltage protecting function.
As can be seen here, intelligent terminal's charge protector is provided simultaneously with overvoltage protection, inverse plugging protection and reverse-filling guarantor
Shield.
The present invention has also stated that a kind of intelligent terminal, and aforesaid charge protection device is provided with the intelligent terminal.
Intelligent terminal can be personal digital assistant (PDA), PC, panel computer, mobile phone, videophone, game
Mechanical, electrical sub- photograph album, video conference terminal etc..
The above, only presently preferred embodiments of the present invention is not intended to limit protection scope of the present invention.
Claims (9)
1. a kind of intelligent terminal's charge protection device, it is characterised in that described device includes：The inverse plugging protection mould being sequentially connected in series
Block, partial pressure route selection module, end switch module, the end switch module include blocking circuit and gating circuit；Wherein：
Inverse plugging protection module, is arranged between charger outfan and partial pressure route selection module, for anti-in charger outfan
When slotting, charger outfan and partial pressure route selection module are blocked；
Partial pressure route selection module, in charging path overvoltage, being routed to the blocking circuit of end switch module, disconnects charging and leads to
Road；In the non-anti-plug of charger outfan and charging path not overvoltage when, be routed to the gating circuit of end switch module, connection is filled
Electric pathway；Wherein, the partial pressure route selection module includes first resistor, second resistance, 3rd resistor, the first N-type metal-oxide
Semiconductor N metal-oxide-semiconductor, the second NMOS tube and the 3rd P-type mos PMOS, wherein first resistor one end is connected to
The outfan of inverse plugging protection module, the other end are connected to one end of second resistance, and second resistance one end is connected to first resistor,
The other end is grounded, and 3rd resistor one end is connected to the outfan of inverse plugging protection module, the drain electrode of the other end and the first NMOS tube,
The grid connection of the grid of the second NMOS tube and the 3rd PMOS, the grid of the first NMOS tube are connected to first, second resistance
Between, source ground, the drain electrode of the second NMOS tube are connected with the drain electrode of the 3rd PMOS, source ground, the source of the 3rd PMOS
Pole is connected to charger outfan.
2. charge protection device according to claim 1, it is characterised in that the end switch module, is additionally operable to fill
Electric pathway provides reverse-filling protection.
3. charge protection device according to claim 1, it is characterised in that the inverse plugging protection module includes the three or two
Pole pipe, the anode of the 3rd diode are connected to charger outfan, and negative electrode is connected to the partial pressure route selection module.
4. charge protection device according to claim 1, it is characterised in that the end switch module includes a PMOS
Pipe and the second PMOS, the grid of first, second PMOS are connected to the outfan of partial pressure route selection module, and first, second
The source electrode of PMOS is connected to each other, and the drain electrode of the first PMOS is connected to charger outfan, the drain electrode connection of the second PMOS
To the charging port of intelligent terminal.
5. charge protection device according to claim 4, it is characterised in that first PMOS and the second PMOS,
First, second diode, back-to-back mated condition of first, second diode in reverse-filling are included respectively.
6. charge protection device according to claim 4, it is characterised in that the partial pressure route selection module is in charging path mistake
During pressure, the blocking circuit of end switch module is routed to, disconnects charging path, including：
During charging path overvoltage, first, second electric resistance partial pressure turns on the first NMOS tube, the second NMOS tube, the 3rd gate pmos
Pole is pulled to low level, and the cut-off of the second NMOS tube, the conducting of the 3rd PMOS are pressed between the source electrode and grid of first, second PMOS
Drop is turned off first, second PMOS.
7. charge protection device according to claim 4, it is characterised in that the partial pressure route selection module is exported in charger
When the non-anti-plug in end and not over-pressed charging path, the gating circuit of end switch module is routed to, connects charging path, including：
In the non-anti-plug of charger outfan and charging path not overvoltage when, the 3rd diode current flow, first, second electric resistance partial pressure make
First NMOS tube is ended, and the drain electrode of the first NMOS tube is high level, the voltage at 3rd resistor make the conducting of the second NMOS tube, the 3rd
PMOS is ended, and the grid of first, second PMOS is pulled to low level, and first, second PMOS is both turned on.
8. a kind of intelligent terminal, it is characterised in that filling described in any one of claim 1 to 7 is provided with the intelligent terminal
Electrical protective device.
9. intelligent terminal according to claim 8, it is characterised in that the intelligent terminal is personal digital assistant PDA, individual
People's computer, panel computer, mobile phone, videophone, game machine, electron album, video conference terminal.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068019.5A CN104037734B (en) | 2013-03-04 | 2013-03-04 | Charging protection device for intelligent terminal, and intelligent terminal |
| PCT/CN2013/079734 WO2013167060A2 (en) | 2013-03-04 | 2013-07-19 | Charging protection device for intelligent terminal and intelligent terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310068019.5A CN104037734B (en) | 2013-03-04 | 2013-03-04 | Charging protection device for intelligent terminal, and intelligent terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104037734A CN104037734A (en) | 2014-09-10 |
| CN104037734B true CN104037734B (en) | 2017-04-26 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310068019.5A Active CN104037734B (en) | 2013-03-04 | 2013-03-04 | Charging protection device for intelligent terminal, and intelligent terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104037734B (en) |
| WO (1) | WO2013167060A2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104300640B (en) * | 2014-10-20 | 2017-06-09 | 上海电机学院 | A kind of novel storage battery group charging control circuit and its method |
| CN106229962B (en) * | 2016-08-11 | 2018-10-30 | 上海能埔电子有限公司 | A kind of power source reverse connection protection circuit |
| CN108695923B (en) * | 2018-05-04 | 2020-08-07 | 深圳市天珑物联网有限公司 | Charging system for charging terminal and electronic equipment |
| CN111130328B (en) * | 2018-10-31 | 2021-12-28 | 瑞昱半导体股份有限公司 | Interface circuit and method for controlling switch circuit in interface circuit |
| CN113054711B (en) * | 2021-03-29 | 2024-04-19 | 深圳市卡卓无线信息技术有限公司 | Charging circuit with multiple charging ports |
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| CN101174770A (en) * | 2007-11-21 | 2008-05-07 | 中兴通讯股份有限公司 | Charging protection method and device |
| CN202363936U (en) * | 2011-11-29 | 2012-08-01 | 中兴通讯股份有限公司 | Terminal charging protection circuit |
| CN102624051A (en) * | 2012-03-19 | 2012-08-01 | 惠州Tcl移动通信有限公司 | Mobile phone and charging protection circuit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP4025580B2 (en) * | 2002-05-15 | 2007-12-19 | ソニー株式会社 | Charging device and control method of charging device |
| CN101841181B (en) * | 2010-04-29 | 2013-07-17 | 隆鑫通用动力股份有限公司 | Charger |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101174770A (en) * | 2007-11-21 | 2008-05-07 | 中兴通讯股份有限公司 | Charging protection method and device |
| CN202363936U (en) * | 2011-11-29 | 2012-08-01 | 中兴通讯股份有限公司 | Terminal charging protection circuit |
| CN102624051A (en) * | 2012-03-19 | 2012-08-01 | 惠州Tcl移动通信有限公司 | Mobile phone and charging protection circuit |
Also Published As
| Publication number | Publication date |
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| WO2013167060A3 (en) | 2014-02-06 |
| CN104037734A (en) | 2014-09-10 |
| WO2013167060A2 (en) | 2013-11-14 |
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