CN206226055U - A kind of electronic equipment, interface module and its charging overvoltage protection circuit - Google Patents
A kind of electronic equipment, interface module and its charging overvoltage protection circuit Download PDFInfo
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- CN206226055U CN206226055U CN201621138961.XU CN201621138961U CN206226055U CN 206226055 U CN206226055 U CN 206226055U CN 201621138961 U CN201621138961 U CN 201621138961U CN 206226055 U CN206226055 U CN 206226055U
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- 230000004224 protection Effects 0.000 title claims abstract description 49
- 239000003990 capacitor Substances 0.000 claims description 8
- 230000001052 transient effect Effects 0.000 claims description 6
- 230000001012 protector Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 7
- 230000005611 electricity Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- 230000036632 reaction speed Effects 0.000 description 1
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Abstract
The utility model discloses a kind of electronic equipment, interface module and its charging overvoltage protection circuit, overvoltage crowbar includes PNP triode, PMOS, first resistor, second resistance, 3rd resistor, 4th resistance and the 5th resistance, the emitter stage connection signal input part of PNP triode, the first resistor and second resistance being sequentially connected in series are connected between the emitter stage and base stage of PNP triode, the tie point of first resistor and second resistance is connected with the source electrode of PMOS, the drain electrode connection signal output part of PMOS, the base stage of PNP triode is also grounded by 3rd resistor, the 4th resistance and the 5th resistance being sequentially connected in series are connected between the colelctor electrode and ground of PNP triode, the tie point of the 4th resistance and the 5th resistance is connected with the grid of PMOS.By the connected mode of foregoing circuit so that the voltage of the signal output part output of charge protector is maintained in default safe range, and simple structure, low cost, good reliability.
Description
Technical field
The utility model is related to the technical field of electronic equipment, more particularly to a kind of electronic equipment, interface module and its fills
Electric overvoltage crowbar.
Background technology
The use of the communicating terminals such as mobile phone, panel computer is increasingly popularized, and in actual life, but few people take at any time
With original-pack charger.In the prior art, the wide variety of various brands charger, spread in performance are uneven, and some countries and ground
The line voltage in area is unstable, and charging environment is extremely complex, or even is favorably dedicated for what mobile phone charged with stall with goods spread out on the ground for sale in the country such as India
Business model, causes the products such as mobile phone to must endure as the test of all kinds of charger compatibility and surge impact.Existing many operators
Start the surge test standard of raising charging inlet, such as some mobile-phone manufacturers are removed for the handset capability of itself in charge port
The high current TVS pipe (Transient Voltage Suppressor, Transient Suppression Diode) for increasing antisurge outward, can also
Compulsive requirement increase OVP (Over Voltage Protection overvoltage protections) circuit according to part manufacturer, and hand at present
Though the voltage protection chip that machine includes OVP circuits takes up space smaller, complex structure, price is higher, using also dumb.
Utility model content
The utility model provides a kind of electronic equipment, interface module and its charging overvoltage protection circuit, to solve existing skill
Case for mobile telephone contains the voltage protection chip structure complexity of OVP circuits in art, and price is higher, uses the also technical problem such as dumb.
In order to solve the above technical problems, the utility model uses a kind of technical scheme：A kind of charging overvoltage protection electricity is provided
Road, it includes signal input part (a), PNP triode (Q1), PMOS (Q2), first resistor (R1), second resistance (R2),
Three resistance (R3), the 4th resistance (R4), the 5th resistance (R5) and signal output part (b), the transmitting of the PNP triode (Q1)
Pole connects the signal input part (a), and for being sequentially connected in series is connected between the emitter stage and base stage of the PNP triode (Q1)
The tie point (c) of one resistance (R1) and the second resistance (R2), the first resistor (R1) and the second resistance (R2) with
The source electrode of PMOS (Q2) is connected, and the drain electrode of the PMOS (Q2) connects the signal output part (b), the poles of the PNP tri-
Manage (Q1) base stage also by 3rd resistor (R3) ground connection, be connected between the colelctor electrode and ground of the PNP triode (Q1) according to
The tie point (d) of the 4th resistance (R4) of secondary series connection and the 5th resistance (R5), the 4th resistance (R4) and the 5th resistance (R5)
Grid with the PMOS (Q2) is connected, wherein：
When the voltage of signal input part is without departing from upper voltage limit, the voltage of the signal input part is by the second resistance
(R2) base stage of the PNP triode (Q1) and after the 3rd resistor (R3) partial pressure is loaded on, to make the PNP triode
(Q1) in closed mode, the PMOS (Q2) turns on because grid is in low level, and the voltage of the signal input part leads to successively
Cross first resistor (R1) and PMOS (Q2) and transmit to signal output part (b)；
When signal input terminal voltage exceeds upper voltage limit, the PNP triode (Q1) is because its emitter voltage is raised
Conducting, the voltage of the signal input part (a) loads on PMOS after the 4th resistance (R4) and the 5th resistance (R5) partial pressure
(Q2) grid, the PMOS (Q2) is closed and makes signal output part Non voltage output.
In some embodiments, it is connected between the drain electrode of the PMOS (Q2) and the base stage of PNP triode (Q1)
Positive feedback resistor (R6), the positive feedback resistor (R6) is used for：
When signal input terminal voltage is without departing from upper voltage limit, the high level of signal output part is fed back into PNP triode
(Q1) base stage, to make PNP triode (Q1) keep in off position；
When the voltage of signal input part (a) exceeds upper voltage limit, the low level of signal output part (b) is fed back into PNP
The base stage of triode (Q1), and the base potential of PNP triode (Q1) is dragged down, to make the PNP triode (Q1) turn on.
In some embodiments, charging capacitor (C1) is connected between the source electrode and ground of the PMOS (Q2), it is described
Charging capacitor (C1) is used to be started to charge up when signal input part (a) accesses high pressure burst, to make in first resistor (R1)
Transient high-current pulse is produced, until when the voltage that first resistor (R1) is carried is more than the conducting voltage of PNP triode (Q1), driving
PNP triode (Q1) is set to turn on rapidly, to make PMOS (Q2) close rapidly.
In some embodiments, it is connected with surge protection pipe (D1) between the source electrode and ground of the PMOS (Q2).
In some embodiments, the surge protection pipe (D1) is TVS pipe.
In some embodiments, the PMOS (Q2) is enhanced PMOS (Q2).
In some embodiments, the PNP triode (Q1) is integrated in a chip with the PMOS (Q2).
In some embodiments, the charging overvoltage protection circuit is integrated in a chip.
In order to solve the above technical problems, the utility model is using another technical scheme：A kind of interface module is provided, it is described
Interface module includes the above-mentioned charging overvoltage protection circuit.
In order to solve the above technical problems, the utility model is using another technical scheme：A kind of electronic equipment is provided, it is described
Electronic equipment wraps the interface module stated.
The utility model beneficial effect is：Prior art is different from, the utility model provides a kind of electronic equipment, interface mould
Block and its charging overvoltage protection circuit, in charging overvoltage protection circuit, when charger exports normal charging voltage, signal
Without departing from upper voltage limit, PNP triode now is in closed mode to input terminal voltage, and PMOS is in conducting state, signal output
Hold and provide normal charging voltage to electronic equipment；When the output voltage of charger exceeds upper voltage limit, PNP triode conducting
To make PMOS close, signal output part Non voltage output.Connected by foregoing circuit so that the signal of charge protector is defeated
Go out terminal voltage to be maintained in default safe range.Charging overvoltage protection circuit of the present utility model only needs a PNP triode
Voltage protection just can be realized with a PMOS, it is simple structure, with low cost, and good reliability.Correspondingly, filled with above-mentioned
Electronic equipment, the interface module of electric overvoltage crowbar similarly have the effect above.
Brief description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, further feature of the present utility model and advantage will become more
Plus substantially.
Fig. 1 is the connection diagram of the utility model charging overvoltage protection circuit.
Specific embodiment
Example embodiment is described more fully with referring now to accompanying drawing.However, example embodiment can be with various shapes
Formula is implemented, and is not understood as limited to implementation method set forth herein.Conversely, thesing embodiments are provided so that this practicality is new
The design of example embodiment fully and completely, and will comprehensively be conveyed to those skilled in the art by type.For convenience or
It is clear, may exaggerate, omit or be schematically illustrated in the thickness and size of every layer shown in accompanying drawing and schematically illustrate phase
Close the quantity of element.In addition, the size of element not exclusively reflects actual size, and related elements quantity incomplete reaction reality
Border quantity.Identical reference represents same or similar structure in figure.
Additionally, described feature, structure can be combined in one or more implementation methods in any suitable manner.
In the following description, there is provided many details fully understand so as to be given to implementation method of the present utility model.However,
One of ordinary skill in the art would recognize that, there is no one or more in the specific detail, or using other structures, constituent element
Deng, it is also possible to put into practice the technical solution of the utility model.In other cases, it is not shown in detail or describes known features or behaviour
Make to avoid fuzzy the utility model.
In description of the present utility model, it is to be understood that：" multiple " includes two and two or more, unless otherwise bright
It is really specific to limit.The words such as " first ", " second " occurred in each element title are not that the priority that restriction element occurs is suitable
Sequence, but for convenience of element name, clearly distinguish each element so that description is more succinct.
Fig. 1 is referred to, Fig. 1 is the connection diagram of the utility model charging overvoltage protection circuit.It is of the present utility model to fill
Electric overvoltage crowbar includes signal input part a, PNP triode Q1, PMOS Q2, first resistor R1, second resistance R2, the 3rd
Resistance R3, the 4th resistance R4, the 5th resistance R5 and signal output part b.
Signal input part a is used to connect charger, and the emitter stage of PNP pipe Q1 is connected to signal input part a, PNP pipe Q1's
The first resistor R1 and second resistance R2 being sequentially connected in series, first resistor R1 and second resistance R2 are connected between emitter stage and base stage
Tie point c be connected with the source electrode of PMOS Q2, signal output part b is used to connect the charging circuit of rear class, PMOS Q2's
Drain electrode is connected with signal output part b so as to charging voltage is provided rear class charging circuit, the base stage of PNP pipe Q1 is also by the 3rd electricity
Resistance R3 ground connection, is connected with the 4th resistance R4 and the 5th resistance R5 being sequentially connected in series, the 4th electricity between the colelctor electrode and ground of PNP pipe Q1
The tie point d for hindering R4 and the 5th resistance R5 is connected with the grid of PMOS Q2.
By above-mentioned element connected mode, when the voltage of signal input part a is without departing from upper voltage limit, the signal input
The voltage of a is held to pass through to load on the base stage of PNP pipe Q1 after second resistance R2 and 3rd resistor R3 partial pressures, to make PNP pipe Q1 in pass
Closed state, PMOS Q2 is turned on because grid is in low level, and signal input part a voltages pass sequentially through first resistor R1 and PMOS
Q2 and transmit to signal output part b.When signal input part a voltages exceed upper voltage limit, PNP pipe Q1 is because of its emitter voltage liter
High and turn on, signal input part a voltages load on the grid of PMOS Q2 after the 4th resistance R4 and the 5th resistance R5 partial pressures,
PMOS Q2 is closed and is made signal output part b Non voltage outputs.
In above-mentioned charge protector, when charger export normal charging voltage when, signal input part a voltages without departing from
Upper voltage limit, PNP pipe Q1 now is in closed mode, and PMOS Q2 is in conducting state, and signal output part b is provided to electronic equipment
Normal charging voltage；When the output voltage of charger exceeds upper voltage limit, PNP pipe Q1 is turned on to make PMOS Q2 close,
Signal output part b Non voltage outputs.
Connected by foregoing circuit so that the voltage of the signal output part b outputs of charge protector is maintained at default
In safe range.Charging overvoltage protection circuit of the present utility model only needs a PNP triode and the PMOS just can to realize
Voltage protection, it is simple structure, with low cost, and good reliability.
Used as a kind of preferred embodiment, further, charge protector of the present utility model also includes positive feedback resistor R6.
Positive feedback resistor R6 is connected between the drain electrode of PMOS Q2 and the base stage of PNP pipe Q1, and positive feedback resistor R6 is used for：
When signal input part a voltages are without departing from upper voltage limit, the high level of signal output part b is fed back into PNP pipe Q1
Base stage, with make PNP pipe Q1 keep in off position；
When signal input part a voltages exceed upper voltage limit, the low level of signal output part (b) is fed back into the poles of PNP tri-
The base stage of (Q1) is managed, and the base potential of PNP triode (Q1) is dragged down, to make PNP pipe Q1 turn on.Specifically, when signal is defeated
When entering to hold a voltages to exceed upper voltage limit, the partial pressure increase of second resistance R2 causes PNP pipe Q1 conductings, while on the 5th resistance R5
Voltage is raised increases PMOS Q2 impedances, so that signal output part b voltages reduction (becoming low level), feedback resistance R6
The low level of output end b is fed back into PNP triode Q1, the base potential of PNP triode Q1 is dragged down so that PNP triode
Q1 is turned on rapidly, is finally made PMOS Q2 quick closedowns and is kept.
In the presence of above-mentioned positive feedback resistor R6, the reaction speed of charge protector is substantially increased so that charge
Overvoltage crowbar being capable of quick response.
Further, charge protector of the present utility model also includes charging capacitor C1, source electrode and the ground of PMOS Q2
Between, charging capacitor C1 is used to be started to charge up when signal input part a accesses high pressure burst, produced on first resistor R1 with being made
Raw transient high-current pulse, until when the voltage that first resistor R1 is carried is more than the conducting voltage of PNP pipe Q1, ordering about PNP pipe Q1
Rapid conducting, to make PMOS Q2 close rapidly.In the presence of charging capacitor C1, can preferably to PMOS Q2 so that after
Level circuit forms effectively protection.
Further, charge protector of the present utility model also include surge protection pipe D1, the source electrode of PMOS Q2 with
Between ground.Further, surge protection pipe D1 can be TVS pipe, and surge protection pipe D1 can transmit loop to charging voltage
Transient voltage protection is carried out, and then improves the reliability of charging overvoltage protection circuit.
PNP triode (Q1) of the present utility model can be integrated in a chip with PMOS (Q2).In other embodiments
In, above-mentioned charging overvoltage protection circuit can also be all integrated into a chip.The voltage of above-mentioned signal input part a inputs
Can be USB voltages.PMOS (Q2) is preferably enhanced PMOS (Q2).
The utility model also provides a kind of interface module, and it includes above-mentioned charging overvoltage protection circuit.
The utility model also provides a kind of electronic equipment, and it includes above-mentioned interface module.The electronic equipment is as being movement
The various smart machines such as phone, panel computer, remote control, intelligent door lock, Wearable, intelligent wallet.
Charging overvoltage protection circuit of the present utility model, it uses a PMOS FET and a PNP triode group
The charging overvoltage protection circuit that is having multiple protective into simple, not only low cost, operation voltage uniformity are good, and utilize
Positive feedback branch can acceleration switch action, so as to rear class charging circuit and system are formed effectively protection.Correspondingly, with above-mentioned
Electronic equipment, the interface module of charging overvoltage protection circuit similarly have the effect above.
The preferred embodiment of this method is these are only, the scope of the claims of this method is not thereby limited, it is every using we
Equivalent structure or equivalent flow conversion that method specification and accompanying drawing content are made, or directly or indirectly it is used in other related skills
Art field, is similarly included in the scope of patent protection of this method.
Claims (10)
1. a kind of charging overvoltage protection circuit, it is characterised in that including signal input part (a), PNP triode (Q1), PMOS
(Q2), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5) and signal
Output end (b), the emitter stage of the PNP triode (Q1) connects the signal input part (a), the PNP triode (Q1)
The first resistor (R1) and the second resistance (R2) being sequentially connected in series, the first resistor are connected between emitter stage and base stage
(R1) it is connected with the source electrode of PMOS (Q2) with the tie point (c) of the second resistance (R2), the leakage of the PMOS (Q2)
Pole connects the signal output part (b), and the base stage of the PNP triode (Q1) is also grounded by 3rd resistor (R3), the PNP
The 4th resistance (R4) and the 5th resistance (R5) being sequentially connected in series, the described 4th are connected between the colelctor electrode and ground of triode (Q1)
The tie point (d) of resistance (R4) and the 5th resistance (R5) is connected with the grid of the PMOS (Q2), wherein：
When the voltage of signal input part is without departing from upper voltage limit, the voltage of the signal input part is by the second resistance (R2)
With the base stage that the PNP triode (Q1) is loaded on after the 3rd resistor (R3) partial pressure, to make the PNP triode (Q1) be in
Closed mode, the PMOS (Q2) turns on because grid is in low level, and the voltage of the signal input part passes sequentially through first
Resistance (R1) and PMOS (Q2) and transmit to signal output part (b)；
When signal input terminal voltage exceeds upper voltage limit, the PNP triode (Q1) turns on because its emitter voltage is raised,
The voltage of the signal input part (a) loads on PMOS (Q2) after the 4th resistance (R4) and the 5th resistance (R5) partial pressure
Grid, the PMOS (Q2) is closed and makes signal output part Non voltage output.
2. charging overvoltage protection circuit as claimed in claim 1, it is characterised in that the charging overvoltage protection circuit also includes
Positive feedback resistor (R6), the positive feedback resistor (R6) is connected to drain electrode and the PNP triode (Q1) of the PMOS (Q2)
Between base stage, the positive feedback resistor (R6) is used for：
When the voltage of signal input part (a) is without departing from upper voltage limit, the high level of signal output part (b) is fed back into PNP tri-
The base stage of pole pipe (Q1), to make PNP triode (Q1) keep in off position；
When the voltage of signal input part (a) exceeds upper voltage limit, the low level of signal output part (b) is fed back into the poles of PNP tri-
The base stage of (Q1) is managed, and the base potential of PNP triode (Q1) is dragged down, to make the PNP triode (Q1) turn on.
3. charging overvoltage protection circuit as claimed in claim 1, it is characterised in that the charging overvoltage protection circuit also includes
Charging capacitor (C1), the charging capacitor (C1) is connected between the source electrode of the PMOS (Q2) and ground, the charging capacitor
(C1) it is used to be started to charge up when signal input part (a) accesses high pressure burst, produced in the first resistor (R1) with is made
Transient high-current pulse, until conducting voltage of the voltage more than the PNP triode (Q1) that the first resistor (R1) is carried
When, order about PNP triode (Q1) and turn on rapidly, to make the PMOS (Q2) close rapidly.
4. charging overvoltage protection circuit as claimed in claim 1, it is characterised in that the charging overvoltage protection circuit also includes
Surge protection pipe (D1), the surge protection pipe (D1) is connected between the source electrode of the PMOS (Q2) and ground.
5. charging overvoltage protection circuit as claimed in claim 4, it is characterised in that the surge protection pipe (D1) is TVS pipe.
6. charging overvoltage protection circuit as claimed in claim 1, it is characterised in that the PMOS (Q2) is enhanced PMOS
Pipe (Q2).
7. charging overvoltage protection circuit as claimed in claim 1, it is characterised in that the PNP triode (Q1) with it is described
PMOS (Q2) is integrated in a chip.
8. charging overvoltage protection circuit as claimed in any one of claims 1 to 6, it is characterised in that the charging overvoltage protection
Circuit is integrated in a chip.
9. a kind of interface module, it is characterised in that the interface module includes filling described in the claim 1-8 any one
Electric overvoltage crowbar.
10. a kind of electronic equipment, it is characterised in that the electronic equipment includes the interface module described in claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621138961.XU CN206226055U (en) | 2016-10-19 | 2016-10-19 | A kind of electronic equipment, interface module and its charging overvoltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621138961.XU CN206226055U (en) | 2016-10-19 | 2016-10-19 | A kind of electronic equipment, interface module and its charging overvoltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226055U true CN206226055U (en) | 2017-06-06 |
Family
ID=58788292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621138961.XU Expired - Fee Related CN206226055U (en) | 2016-10-19 | 2016-10-19 | A kind of electronic equipment, interface module and its charging overvoltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206226055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531821A (en) * | 2019-09-27 | 2019-12-03 | 北京兆芯电子科技有限公司 | Voltage-regulating circuit |
-
2016
- 2016-10-19 CN CN201621138961.XU patent/CN206226055U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110531821A (en) * | 2019-09-27 | 2019-12-03 | 北京兆芯电子科技有限公司 | Voltage-regulating circuit |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210827 Address after: 518000 201, No.26, yifenghua Innovation Industrial Park, Xinshi community, Dalang street, Longhua District, Shenzhen City, Guangdong Province Patentee after: Shenzhen waterward Information Co.,Ltd. Address before: 518067 6 / F, block B, Huayuan city digital building, 1079 Nanhai Avenue, Shekou, Nanshan District, Shenzhen, Guangdong Patentee before: SHENZHEN WATER WORLD Co.,Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 |