CN106505720A - A kind of on-off circuit and terminal unit for solving shutdown electric leakage - Google Patents
A kind of on-off circuit and terminal unit for solving shutdown electric leakage Download PDFInfo
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- CN106505720A CN106505720A CN201611033232.2A CN201611033232A CN106505720A CN 106505720 A CN106505720 A CN 106505720A CN 201611033232 A CN201611033232 A CN 201611033232A CN 106505720 A CN106505720 A CN 106505720A
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- effect transistor
- field effect
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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
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
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- Engineering & Computer Science (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a kind of on-off circuit and terminal unit for solving shutdown electric leakage.Wherein, on-off circuit at least includes the first field effect transistor and the second field effect transistor；The control end coupling of the first field effect transistor is from the second connection end of the control signal and the second field effect transistor of power consuming devices, the first connection end coupling battery of the first field effect transistor, the second connection end coupling power consuming devices of the first field effect transistor；The control end coupling switch of the second field effect transistor and battery, the first connection end coupling battery of the second field effect transistor；Wherein, at least two diodes are in series between the first field effect transistor and first connection end and the second connection end of the second field effect transistor, the back-to-back connection of at least two in diode, a parasitic body diode of in diode for the first field effect transistor.By foregoing circuit, when system closedown, the first field effect transistor and the second field effect transistor are in closed mode, are not turned between battery and power consuming devices, solve the problems, such as to leak electricity during system closedown.
Description
Technical field
The present invention relates to technical field of electronic products, more particularly to a kind of on-off circuit for solving shutdown electric leakage and terminal
Equipment.
Background technology
With the day by day ripe and popularization of electronic product, more and more users select to use smart electronicses product, in electronics
While the function and performance of product are increasingly improved, user begins to focus on the battery of electronic product and safety problem.
However, current electronic product is essentially all as power supply using lithium ion battery, Ni-MH battery etc., by
In the reason for software design or hardware circuit, even if after " shutdown ", certain subprogram of electronic product or circuit are still in work
Make, do not accomplish shutdown truly, also remain the leakage current of a part, not only cause battery power consumption big, can also draw
Play uncertain safety problem.
Content of the invention
The invention mainly solves the technical problem of providing a kind of on-off circuit and terminal unit for solving shutdown electric leakage, use
Leak electricity when system closedown is solved the problems, such as.
For solving above-mentioned technical problem, one aspect of the present invention is：A kind of solution shutdown electric leakage is provided
On-off circuit, the on-off circuit at least include the first field effect transistor and the second field effect transistor；The control of first field effect transistor
End processed is coupled from the second connection end of the control signal and second field effect transistor of power consuming devices, first field effect transistor
The first connection end coupling battery, first field effect transistor the second connection end coupling power consuming devices；Second field effect
The control end coupling switch of pipe and the battery, the first connection end of second field effect transistor couple the battery；System is closed
During machine, first field effect transistor is closed in the presence of the control signal, and second field effect transistor is in institute
It is closed in the presence of stating cell output voltage, is not turned between the battery and the power consuming devices；Wherein, described
At least two diodes, two pole are in series between first connection end and second connection end of the first field effect transistor
At least two back-to-back connections in pipe, a parasitic body diode of in the diode for first field effect transistor；
At least two diodes are in series between first connection end and second connection end of second field effect transistor, described
At least two back-to-back connections in diode, parasitic body two pole of in the diode for second field effect transistor
Pipe.
Wherein, first field effect transistor is N-channel metal-oxide-semiconductor field-effect transistor；Second field effect
Manage as P-channel metal-oxide-semiconductor field-effect transistor.
Wherein, the on-off circuit also includes first resistor, second resistance and the first diode；The one of the first resistor
End respectively with the second resistance, the control end of first diode and first field effect transistor and second field effect
The second connection end coupling of pipe；The other end of the first resistor and system charging voltage are coupled, the second resistance another
End ground connection；Control signal of the other end coupling of first diode from power consuming devices；When system closedown charges, described the
One field effect transistor is turned in the presence of the first resistor with the second resistance, the system charging voltage and the power consumption
Device and the battery normally connect.
Wherein, the on-off circuit also includes 3rd resistor；Imitate with described second respectively one end of the 3rd resistor
Should pipe control end and the switch coupling；The other end of the 3rd resistor connects with the first of second field effect transistor respectively
Connect end and battery coupling；During system boot, second field effect transistor is in the conduction state in the presence of the switch,
First field effect transistor is in the conduction state in the presence of the control signal, between the battery and the power consuming devices
Conducting.
For solving above-mentioned technical problem, another technical solution used in the present invention is：A kind of terminal unit is provided, described
Terminal unit includes on-off circuit, battery, switch and power consuming devices；The on-off circuit at least includes the first field effect transistor and
Two field effect transistor；Control signal and second field effect of the control end coupling of first field effect transistor from power consuming devices
Second connection end of pipe, the first connection end coupling battery of first field effect transistor, the second company of first field effect transistor
Connect end coupling power consuming devices；The control end coupling switch of second field effect transistor and the battery, second field effect transistor
The first connection end couple the battery；During system closedown, first field effect transistor is located in the presence of the control signal
In closed mode, second field effect transistor is closed in the presence of the cell output voltage, the battery with
It is not turned between the power consuming devices；Wherein, first connection end of first field effect transistor and second connection end
Between be in series with least two diodes, the back-to-back connection of at least two in the diode, in the diode
Parasitic body diode for first field effect transistor；First connection end of second field effect transistor connects with described second
Connecing and at least two diodes are in series between end, the back-to-back connection of at least two in the diode, in the diode
One parasitic body diode for second field effect transistor.
Wherein, the first field effect transistor that the on-off circuit includes is N-channel metal-oxide-semiconductor field-effect transistor；
The second field effect transistor that the on-off circuit includes is P-channel metal-oxide-semiconductor field-effect transistor.
Wherein, the on-off circuit also includes first resistor, second resistance and the first diode；The one of the first resistor
End respectively with the second resistance, the control end of first diode and first field effect transistor and second field effect
The second connection end coupling of pipe；The other end of the first resistor and system charging voltage are coupled, the second resistance another
End ground connection；Control signal of the other end coupling of first diode from power consuming devices；When system closedown charges, described the
One field effect transistor is turned in the presence of the first resistor with the second resistance, the system charging voltage and the power consumption
Device and the battery normally connect.
Wherein, the on-off circuit also includes 3rd resistor；Imitate with described second respectively one end of the 3rd resistor
Should pipe control end and the switch coupling；The other end of the 3rd resistor connects with the first of second field effect transistor respectively
Connect end and battery coupling；During system boot, second field effect transistor is in the conduction state in the presence of the switch,
First field effect transistor is in the conduction state in the presence of the control signal, between the battery and the power consuming devices
Conducting.
The invention has the beneficial effects as follows：When system closedown, the first field effect transistor is in the presence of control signal in pass
Closed state, the second field effect transistor are closed in the presence of cell output voltage, between battery and the power consuming devices
It is not turned on, solves the problems, such as to leak electricity during system closedown.
Description of the drawings
Fig. 1 is the structural representation of the first embodiment of on-off circuit of the present invention；
Fig. 2 is the structural representation of the second embodiment of on-off circuit of the present invention；
Fig. 3 is the structural representation of the 3rd embodiment of on-off circuit of the present invention；
Fig. 4 is the detailed circuit schematic of an embodiment of on-off circuit of the present invention；
Fig. 5 is the terminal unit structural representation of the present invention.
Specific embodiment
The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.It should be noted that reality described below
Apply a part of embodiment that example is only the present invention, rather than whole embodiments.Those of ordinary skill in the art are not doing
The every other embodiment obtained on the premise of going out creative work, belongs to the scope of protection of the invention.
Fig. 1 is referred to, Fig. 1 is the structural representation of the first embodiment of on-off circuit of the present invention.The present embodiment is provided
On-off circuit at least includes the first field effect transistor 10 and the second field effect transistor 11, wherein, the first field effect transistor 10 and second effect
Should pipe 11 couple with control signal 12, switch 13, power consuming devices 14 and battery 15 respectively.
As shown in figure 1, the control end 100 of the first field effect transistor 10 couples the control signal 12 and second from power consuming devices
Second connection end 112 of field effect transistor 11, the coupling of the first connection end 101 battery 15 of the first field effect transistor 10, the first field effect
The coupling of second connection end 102 power consuming devices 14 of pipe 10.The coupling of control end 110 switch 13 of the second field effect transistor 11 and battery
15, the coupling of the first connection end 111 battery 15 of the second field effect transistor 11.
Wherein, at least two are in series between first connection end 101 and the second connection end 102 of the first field effect transistor 10
(being two shown in figure) diode 16, the back-to-back connection of at least two in diode 16.The first of second field effect transistor 11
At least two (being two shown in figure) diode 16 is in series between connection end 111 and the second connection end 112, in diode 16
At least two back-to-back connections.
In the present embodiment, the first field effect transistor is N-channel metal-oxide-semiconductor field-effect transistor, hereinafter referred to as
NMOS tube, the second field effect transistor is P-channel metal-oxide-semiconductor field-effect transistor, hereinafter referred to as PMOS, MOS
(Metal-Oxide-Semiconductor) manage, i.e., insulating properties field effect transistor in integrated circuit.NMOS tube and PMOS are wrapped mostly
Contain parasitic body diode, source electrode (i.e. S poles) can be directly turned on by parasitic body diode with drain electrode (i.e. D poles), work as NMOS tube
When being closed with PMOS, source electrode (i.e. S poles) is still within connected state with drain electrode (i.e. D poles), it is impossible to realize real
Closing in meaning.In the case where NMOS tube and PMOS include parasitic diode, the present embodiment is in NMOS tube and PMOS
Two connection ends between increased a diode respectively, be connected with original parasitic body diode back-to-back, for preventing
Source electrode (i.e. S poles) is directly turned on by parasitic body diode with drain electrode (i.e. D poles).When system closedown, NMOS tube is in control letter
It is closed, PMOS is closed in the presence of cell output voltage, now, battery and work(in the presence of number
It is not turned between consumption device, solves the problems, such as to leak electricity during system closedown.In the present embodiment, two two poles are connected as back-to-back
The negative pole of pipe is connected, and in other cases, two diode cathodes can be connected, and can also equally realize preventing source electrode (i.e. S
Pole) directly turned on by parasitic body diode with drain electrode (i.e. D poles).Further, in other embodiments, if NMOS tube and
The quantity of the diode that connects between two connection ends of PMOS is more than two, then two diodes of wherein connection back-to-back can
To include parasitic body diode, it is also possible to do not include.Further, in other embodiments, the first field effect transistor and/or second
The channel type of field effect transistor can change, and such as the first field effect transistor is PMOS, and the second field effect transistor is NMOS tube
Deng.When the channel type of the first field effect transistor and/or the second field effect transistor changes, need to connect corresponding circuit and each
The parameter of device does corresponding adjustment.
Fig. 2 is the structural representation of the second embodiment of on-off circuit of the present invention, and on the basis of Fig. 1, on-off circuit enters
One step includes first resistor 20, second resistance 21 and the first diode 22.As illustrated, one end of first resistor 20 is respectively with
Second connection end coupling of two resistance 21, the control end of the first diode 22 and the first field effect transistor 23 and the second field effect transistor 24
Connect；The other end of first resistor 20 is coupled with system charging voltage 25, the other end ground connection of second resistance 21；First diode 22
The other end coupling from power consuming devices control signal 26.
In the present embodiment, when system closedown charges, NMOS tube is turned in the presence of first resistor with second resistance, system
Charging voltage and cell communication, provide charging voltage for battery.Meanwhile, system charging voltage is connected with power consuming devices, is being charged
While the voltage of normal work is provided for power consuming devices.
Fig. 3 is the structural representation of the 3rd embodiment of on-off circuit of the present invention, on the basis of Fig. 1, Fig. 2, switch electricity
Road further includes 3rd resistor 31.As illustrated, one end of 3rd resistor 31 control end respectively with the second field effect transistor 32
And switch 34 is coupled；The other end of 3rd resistor 31 is coupled with the first connection end of the second field effect transistor 32 and battery 35 respectively.
In the present embodiment, when system boot, the second field effect transistor is in the conduction state in the presence of switch, first
Effect pipe is in the conduction state in the presence of control signal, turns on, power consuming devices normal work between battery and power consuming devices.
Fig. 4 is the detailed circuit schematic of on-off circuit of the present invention, as illustrated, on-off circuit includes：N ditches metal is aoxidized
Thing semiconductor field effect transistor (hereinafter referred to as NMOS tube) Q1, P-channel metal-oxide-semiconductor field-effect transistor are (below
Referred to as PMOS) two back ofs the body connecting between Q2, resistance R1～R3, two connection ends of the first diode D1 and NMOS tube Q1
The two back-to-back diode D4-D5 connected between backrest diode D2-D3, two connection ends of PMOS Q2.
Wherein, Vsys gives system power supply output voltage for battery, and VBUS is system charging voltage, and GPIO is that system control connects
For exporting the control signal of power consuming devices, K is on ＆ off switch to mouth, and PWRKEY is start PIN, and BAT is cell voltage.
Wherein, R1-R3 is the big valued resistor of hundred K ranks.The coupling of system charging voltage VBUS and resistance R1 and resistance R2,
And the other end ground connection of resistance R2, by the resistance R1 and grid (G of resistance R2 partial pressures, system charging voltage VBUS and NMOS tube Q1
Pole) coupling.System control interface GPIO is coupled with the grid (G poles) of NMOS tube Q1 by the first diode D1, the first diode
D1 can anti-locking system GPIO interface be electrically charged voltage damage.On ＆ off switch K and start PIN PWRKEY and the grid (G of PMOS Q2
Pole) coupling, and coupled by resistance R3 and cell voltage BAT, the other end ground connection of on ＆ off switch K.One end of cell voltage BAT is same
When couple with NMOS tube Q1 and PMOS Q2, battery BAT powers to outside power consuming devices through NMOS tube Q1, and the internal resistance of Q1 should be use up
Possible little, while system maximum power dissipation should be met by the ability of electric current, it is to avoid electric current is excessive to burn out power consuming devices.System
Charging voltage VBUS directly controls the working condition of main path switch NMOS tube and PMOS, and battery electricity with system GPIO interface
Pressure BAT also serves as the working condition that control end directly participates in NMOS tube and PMOS.
When system closedown, system GPIO interface is closed without output, and PMOS Q2 grid (G poles) is drawn by cell voltage BAT
Height, PMOS Q2 are closed, and NMOS tube Q1 grid (G poles) current potential is low, and NMOS tube Q1 is closed, and battery is complete with outside power consuming devices
Disconnect, so as to reduce the problem of shutdown electric leakage.
When system closedown needs to charge the battery, system charging voltage VBUS is connected, NMOS tube Q1 grid (G poles) current potential quilt
Draw high, and then NMOS tube Q1 is turned on, battery and power consuming devices are connected with system charging voltage VBUS, be power consumption while charging
Device provides the voltage of normal work.
When system boot, on ＆ off switch K is pressed, PMOS Q2 grid (G poles) is grounded, and PMOS Q2 is turned on, meanwhile, system
Detect start PIN PWRKEY to be pulled low, system boot, system GPIO interface output high level voltage, NMOS tube Q1 grid
(G poles) current potential is driven high, and NMOS tube Q1 is turned on, and battery can provide voltage, system worked well to power consuming devices.
Fig. 5 is the terminal unit structural representation of the present invention, as illustrated, terminal unit includes：On-off circuit 51, electricity
Pond, switch 52 and power consuming devices 53, wherein, power consuming devices 53 are further included：Radio frequency unit 531, Power Management Unit 532 and
Back light unit 533 etc..Battery 52 is coupled with on-off circuit 51, and the other end of on-off circuit 51 is coupled with power consuming devices 53 so that
Battery is powered to power consuming devices again through on-off circuit, solves the problems, such as to leak electricity during system closedown.Specific embodiment please be joined
The detailed description in above-described embodiment is examined, here is no longer gone to live in the household of one's in-laws on getting married and chatted.
Embodiments of the present invention are the foregoing is only, the scope of the claims of the present invention is not thereby limited, every using this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly it is used in other correlations
Technical field, is included within the scope of the present invention.
Claims (8)
1. the on-off circuit that a kind of solution shutdown is leaked electricity, it is characterised in that
The on-off circuit at least includes the first field effect transistor and the second field effect transistor；
The control end coupling of first field effect transistor is from the of the control signal and second field effect transistor of power consuming devices
Two connection ends, the first connection end coupling battery of first field effect transistor, the second connection end coupling of first field effect transistor
Connect power consuming devices；The control end coupling switch of second field effect transistor and the battery, the first of second field effect transistor
Connection end couples the battery；
During system closedown, first field effect transistor is closed in the presence of the control signal, described second
Effect pipe is closed in the presence of the cell output voltage, is not led between the battery and the power consuming devices
Logical；
Wherein, at least two 2 are in series between first connection end and second connection end of first field effect transistor
Pole pipe, the back-to-back connection of at least two in the diode, in the diode are first field effect transistor
Parasitic body diode；
At least two diodes are in series between first connection end and second connection end of second field effect transistor,
At least two back-to-back connections in the diode, a parasitic body of in the diode for second field effect transistor
Diode.
2. circuit according to claim 1, it is characterised in that
First field effect transistor is N-channel metal-oxide-semiconductor field-effect transistor；
Second field effect transistor is P-channel metal-oxide-semiconductor field-effect transistor.
3. circuit according to claim 2, it is characterised in that
The on-off circuit also includes first resistor, second resistance and the first diode；
The control respectively with the second resistance, first diode and first field effect transistor of one end of the first resistor
The second connection end coupling of end processed and second field effect transistor；
The other end of the first resistor is coupled with system charging voltage, the other end ground connection of the second resistance；
Control signal of the other end coupling of first diode from power consuming devices；
When system closedown charges, first field effect transistor is turned in the presence of the first resistor with the second resistance,
The system charging voltage is normally connected with the power consuming devices and the battery.
4. circuit according to claim 3, it is characterised in that
The on-off circuit also includes 3rd resistor；
Control end and the switch coupling respectively with second field effect transistor of one end of the 3rd resistor；
The first connection end and the battery coupling respectively with second field effect transistor of the other end of the 3rd resistor；
During system boot, second field effect transistor is in the conduction state in the presence of the switch, first field effect
Pipe is in the conduction state in the presence of the control signal, turns between the battery and the power consuming devices.
5. a kind of terminal unit, it is characterised in that the terminal unit includes on-off circuit, battery, switch and power consuming devices；
The on-off circuit at least includes the first field effect transistor and the second field effect transistor；
The control end coupling of first field effect transistor is from the of the control signal and second field effect transistor of power consuming devices
Two connection ends, the first connection end coupling battery of first field effect transistor, the second connection end coupling of first field effect transistor
Connect power consuming devices；The control end coupling switch of second field effect transistor and the battery, the first of second field effect transistor
Connection end couples the battery；
During system closedown, first field effect transistor is closed in the presence of the control signal, described second
Effect pipe is closed in the presence of the cell output voltage, is not led between the battery and the power consuming devices
Logical；
Wherein, at least two 2 are in series between first connection end and second connection end of first field effect transistor
Pole pipe, the back-to-back connection of at least two in the diode, in the diode are first field effect transistor
Parasitic body diode；
At least two diodes are in series between first connection end and second connection end of second field effect transistor,
At least two back-to-back connections in the diode, a parasitic body of in the diode for second field effect transistor
Diode.
6. terminal unit according to claim 5, it is characterised in that
The first field effect transistor that the on-off circuit includes is N-channel metal-oxide-semiconductor field-effect transistor；
The second field effect transistor that the on-off circuit includes is P-channel metal-oxide-semiconductor field-effect transistor.
7. terminal unit according to claim 6, it is characterised in that
The on-off circuit also includes first resistor, second resistance and the first diode；
The control respectively with the second resistance, first diode and first field effect transistor of one end of the first resistor
The second connection end coupling of end processed and second field effect transistor；
The other end of the first resistor is coupled with system charging voltage, the other end ground connection of the second resistance；
Control signal of the other end coupling of first diode from power consuming devices；
When system closedown charges, first field effect transistor is turned in the presence of the first resistor with the second resistance,
The system charging voltage is normally connected with the power consuming devices and the battery.
8. terminal unit according to claim 7, it is characterised in that
The on-off circuit also includes 3rd resistor；
Control end and the switch coupling respectively with second field effect transistor of one end of the 3rd resistor；
The first connection end and the battery coupling respectively with second field effect transistor of the other end of the 3rd resistor；
During system boot, second field effect transistor is in the conduction state in the presence of the switch, first field effect
Pipe is in the conduction state in the presence of the control signal, turns between the battery and the power consuming devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033232.2A CN106505720A (en) | 2016-11-15 | 2016-11-15 | A kind of on-off circuit and terminal unit for solving shutdown electric leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611033232.2A CN106505720A (en) | 2016-11-15 | 2016-11-15 | A kind of on-off circuit and terminal unit for solving shutdown electric leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106505720A true CN106505720A (en) | 2017-03-15 |
Family
ID=58327589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611033232.2A Pending CN106505720A (en) | 2016-11-15 | 2016-11-15 | A kind of on-off circuit and terminal unit for solving shutdown electric leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106505720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108988300A (en) * | 2018-06-11 | 2018-12-11 | 山东超越数控电子股份有限公司 | A kind of laptop circuit Self-disconnecting circuit structure and control method |
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