CN109412570A - A kind of switch driving circuit, controller and electronic equipment - Google Patents
A kind of switch driving circuit, controller and electronic equipment Download PDFInfo
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- CN109412570A CN109412570A CN201811416643.9A CN201811416643A CN109412570A CN 109412570 A CN109412570 A CN 109412570A CN 201811416643 A CN201811416643 A CN 201811416643A CN 109412570 A CN109412570 A CN 109412570A
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- 239000003990 capacitor Substances 0.000 claims description 9
- 238000010586 diagram Methods 0.000 description 10
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- 238000005516 engineering process Methods 0.000 description 7
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- 230000015556 catabolic process Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 208000037408 Device failure Diseases 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/567—Circuits characterised by the use of more than one type of semiconductor device, e.g. BIMOS, composite devices such as IGBT
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K2217/00—Indexing scheme related to electronic switching or gating, i.e. not by contact-making or -breaking covered by H03K17/00
- H03K2217/0081—Power supply means, e.g. to the switch driver
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Abstract
本发明属于电路设计技术领域，尤其涉及一种开关驱动电路、控制器及电子设备。所述开关驱动电路、控制器及电子设备，通过控制输入第一驱动电路的第一驱动信号以及输入第二驱动电路的第二驱动信号实现驱动功能，并控制所述第一驱动电路与第二驱动电路不同时工作，即当第一驱动电路工作时第二驱动电路不工作，当第二驱动电路工作时第一驱动电路不工作，本实施例的开关驱动电路与传统的时刻保持通电状态进行驱动的开关驱动电路相比，能够实现能源的节省以及保护电路的作用。
The invention belongs to the technical field of circuit design, and in particular relates to a switch driving circuit, a controller and an electronic device. The switch drive circuit, the controller and the electronic device realize the drive function by controlling the first drive signal input to the first drive circuit and the second drive signal input to the second drive circuit, and control the first drive circuit and the second drive circuit. The driving circuits do not work at the same time, that is, when the first driving circuit works, the second driving circuit does not work, and when the second driving circuit works, the first driving circuit does not work. Compared with the driven switch driving circuit, the energy saving and the function of the protection circuit can be realized.
Description
Technical field
The present invention relates to technical field of circuit design more particularly to a kind of switch driving circuits, controller and electronic equipment.
Background technique
Currently, need driving circuit to be persistently powered when traditional switch driving circuit realizes driving, cause circuit loss compared with
Greatly, it and generallys use the mode of triode connection starting current (bias current) is provided, for example, passing through the current collection of a triode
Pole is connected to the base stage of another triode, to reach the conducting or shutdown of one triode of control, goes to control another triode
Starting current, to realize the control of conducting or the shutdown to another triode.
Inventor has found during realizing the embodiment of the present application, three required for this kind of mode of existing the relevant technologies
Pole pipe and resistance quantity are more, in the part household appliances of large-scale use, will lead to the increase of production cost, and in reality
In situation of the border using control route, mostly several devices will increase the risk of device failure, will increase product not under equal conditions
Good probability.
Summary of the invention
Present invention seek to address that traditional switch driving circuit needs to keep driving circuit energization shape constantly when realizing driving
State and the problems such as cause circuit loss larger, provide a kind of switch driving circuit, technical solution is as follows:
In order to solve the above technical problems, the embodiment of the present application provides following technical solution:
In a first aspect, the embodiment of the present application provides a kind of switch driving circuit, the switch driving circuit includes: first
Driving circuit and the second driving circuit；
First driving circuit is connect with driving input terminal and drive output, is received in first driving circuit
When first driving signal and first driving signal meet the first drive condition, the driving input terminal output high level and
The drive output exports low level；
Second driving circuit is connect with driving input terminal and drive output, is received in second driving circuit
When second driving signal and second driving signal meet the second drive condition, the driving input terminal output low level and
The drive output exports high level.
Further, first driving circuit includes the first triode, the second triode and the first pull-up circuit, described
The collector of first triode, the base stage of the second triode, first pull-up circuit one end with the drive output
The emitter of connection, the other end of first pull-up circuit and second triode is connect with power input, described
The collector of second triode is connected to the driving input terminal, and the base stage of first triode accesses the first driving signal,
The emitter of first triode is grounded；
Second driving circuit includes third transistor, the 4th triode and the second pull-up circuit, the three or three pole
The base stage of the collector of pipe, one end of the second pull-up circuit and the 4th triode is connect with the driving input terminal, and described second
The other end end of pull-up circuit and the emitter of the 4th triode are connect with the power input, the collection of the 4th triode
Electrode is connect with the driving input terminal, base stage access second driving signal of the third transistor, and the described 3rd 3
The emitter of pole pipe is grounded.
Further, first driving circuit includes the first metal-oxide-semiconductor, the second metal-oxide-semiconductor and the first pull-up circuit, and described the
The source electrode of one metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor, first pull-up circuit one end connect with the drive output, institute
The drain electrode for stating the other end and second metal-oxide-semiconductor of the first pull-up circuit is connect with power input, second metal-oxide-semiconductor
Source electrode is connected to the driving input terminal, and the grid of first metal-oxide-semiconductor accesses the first driving signal, first metal-oxide-semiconductor
Grounded drain；
Second driving circuit includes third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor and the second pull-up circuit, the third metal-oxide-semiconductor
The grid of source electrode, one end of the second pull-up circuit and the 4th metal-oxide-semiconductor is connect with the driving input terminal, second pull-up circuit
Other end end and the drain electrode of the 4th metal-oxide-semiconductor connect with the power input, the source electrode of the 4th metal-oxide-semiconductor and the driving
The grid of input terminal connection, the third metal-oxide-semiconductor accesses second driving signal, the grounded drain of the third metal-oxide-semiconductor.
Further, it is high level signal and second driving that first drive condition, which is first driving signal,
Signal is low level, and second drive condition is that first driving signal is low level and second driving signal is high
Level signal.
Further, first pull-up circuit includes first resistor, and second pull-up circuit includes second resistance.
Further, the switch driving circuit further includes 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance,
For carrying out current limit to the switch driving circuit；
One end of the 3rd resistor is connect with the base stage of the 4th triode, and the other end and the driving input terminal connect
It connects；
One end of 4th resistance is connect with the base stage of second triode, and the other end and the drive output connect
It connects；
One end of 5th resistance is connect with the base stage of first triode, other end access the first driving letter
Number；
One end of 6th resistance is connect with the base stage of the third transistor, other end access the second driving letter
Number.
Further, the switch driving circuit further includes the 8th resistance, the 9th resistance, the tenth resistance and the 11st electricity
Resistance, for carrying out current limit to the switch driving circuit；
One end of 8th resistance is connect with the grid of the 4th metal-oxide-semiconductor, and the other end and the driving input terminal connect
It connects；
One end of 9th resistance is connect with the grid of second metal-oxide-semiconductor, and the other end and the drive output connect
It connects；
One end of tenth resistance is connect with the grid of first metal-oxide-semiconductor, other end access the first driving letter
Number；
One end of the eleventh resistor is connect with the base stage of the third metal-oxide-semiconductor, other end access second driving
Signal.
Further, the switch driving circuit further includes the buffering connecting with the driving input terminal and drive output
Circuit is prevented for limiting the voltage build-up rate of first driving circuit and the second driving circuit because voltage build-up rate is excessive
Circuit is caused to damage；
The buffer circuit includes the 7th resistance and first capacitor, one end and the first capacitor of the 7th resistance
One end connects, the other end connection drive output of the 7th resistance, described in the other end connection of the first capacitor
Drive input terminal.
Second aspect, the embodiment of the present application provide a kind of controller, comprising:
Relay, and
Switch driving circuit as the aforementioned, the relay and the driving input terminal of the switch driving circuit and driving are defeated
Outlet connection；
The relay includes coil input end and coil output, and the coil input end includes coil positive input
And coil reverse input end；
The coil positive input is connect with the driving input terminal of the driving circuit, the coil reverse input end with
The drive output of the driving circuit connects；
The coil output further includes first coil output end and the second coil output；
When the coil positive input is high level and the coil reverse input end is low level, the First Line
Enclose output end work；
When the coil positive input is low level and the coil reverse input end is high level, second line
Enclose output end work.
The third aspect, the embodiment of the present application provide a kind of electronic equipment, comprising:
Load；And
Controller as the aforementioned, the load connect with the first coil output end of the controller and the second coil output
It connects；
The load includes first terminal, Second terminal and third terminal；
The first terminal and Second terminal are connect with the both ends of second coil output；
The first terminal and third terminal are connect with the both ends of the first coil output end.
The beneficial effect of the embodiment of the present application is: switch driving circuit, controller and electronics provided in this embodiment are set
It is standby, the first driving signal of first driving circuit and the second drive of input second driving circuit are inputted by control
Dynamic signal realizes self-locking function, and controls first driving circuit and do not work at the same time with the second driving circuit, i.e., when first drives
The second driving circuit does not work when dynamic circuit work, and when the second drive circuit works, the first driving circuit does not work, this implementation
The switch driving circuit of example remains powered on compared with state realizes self-locking switch driving circuit with traditional, realizes the saving of the energy
And the effect of protection circuit.
Detailed description of the invention
Fig. 1 is a kind of circuit diagram of switch driving circuit provided by the embodiments of the present application；
Fig. 2 is a kind of circuit connection diagram of switch driving circuit provided by the embodiments of the present application；
Fig. 3 is a kind of circuit connection diagram for switch driving circuit that another embodiment of the application provides；
A kind of Fig. 4 circuit connection diagram of controller provided by the embodiments of the present application；
Fig. 5 is the circuit connection diagram of a kind of electronic equipment provided by the embodiments of the present application.
Specific embodiment
The application in order to facilitate understanding with reference to the accompanying drawings and detailed description carries out in more detail the application
It is bright.It should be noted that be expressed " being fixed on " another element when element, it can directly on the other element or
There may be one or more elements placed in the middle therebetween.When an element is expressed " connection " another element, it be can be directly
It is connected to another element in succession or there may be one or more elements placed in the middle therebetween.In addition, term " first ", " the
Two " etc. are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance.
Unless otherwise defined, technical and scientific term all used in this specification is led with technology of the invention is belonged to
The normally understood meaning of the technical staff in domain is identical.It is specific to be intended merely to description for used term in the description of the invention
Embodiment purpose, be not intended to limit this big name.Term "and/or" used in this specification includes one or more
Any and all combinations of relevant listed item.In addition, involved in the application difference embodiment disclosed below
Technical characteristic can be combined with each other as long as they do not conflict with each other.
Embodiment 1
Referring to Fig. 1, Fig. 1 is the circuit diagram of switch driving circuit provided by the invention；As shown in Figure 1, one kind is opened
Driving circuit is closed, the switch driving circuit 100 includes: the first driving circuit 101 and the second driving circuit 102；
First driving circuit 101 is connect with driving input terminal B and drive output A, in first driving circuit
101 receive the first driving signal RLY1 and the first driving signal RLY1 when meeting the first drive condition, and the driving is defeated
Enter to hold B output high level and drive output A output low level；
Second driving circuit 102 is connect with driving input terminal B and drive output A, in second driving circuit
102 receive the second driving signal RLY2 and the second driving signal RLY2 when meeting the second drive condition, and the driving is defeated
Enter to hold defeated B output low level and drive output A output high level.
In the present embodiment, first driving circuit 101 can be mutually indepedent for two with second driving circuit 102
The driving circuit of work, and the driving current direction phase that first driving circuit 101 is provided with second driving circuit 102
Instead, and by control signal input the first driving signal RLY1 and the second driving signal RLY2 being added, realization can not be same
When the function that works, namely second driving circuit 102 does not work when the work of the first driving circuit 101, when the second driving circuit
The first driving circuit 101 does not work when 102 work, to play the interaction of resource, while also improving the life of circuit
Period.
It should be noted that the switch driving circuit 100 is connected with single-chip microcontroller in the present embodiment.Namely single-chip microcontroller is
The switch driving circuit 100 provides the first driving signal RLY1 and the second driving signal RLY2.Single-chip microcontroller is a kind of
IC chip is using very large scale integration technology the central processor CPU, random with data-handling capacity
Memory RAM, read only memory ROM, it is multiple I/O mouthfuls and interrupt system, the functions such as timer/counter (may further include showing
Show the circuits such as driving circuit, pulse-width modulation circuit, analog multiplexer, A/D converter) it is integrated into and constitutes on one piece of silicon wafer
One small and perfect microcomputer system.The first driving signal RLY1 and the second driving signal RLY2 are by described more
A I/O mouthfuls of two of them data port output, the multiple I/O mouthfuls respectively corresponds multiple pins of the single-chip microcontroller, can be with
By the different digital command in write-in " 0 ", " 1 ", so that single-chip microcontroller pin exports 0V low level, alternatively, output high level is (i.e. single
The rated output voltage of piece machine), the size of the high level is related to the specific type selecting of the single-chip microcontroller.First driving signal
The generation equipment requirement of RLY1 and the second driving signal RLY2 can not only export high level signal, but also can export low level letter
Number, it will be understood that the single-chip microcontroller can also be microprocessor, processor and PWM pulsewidth modulation wave generation circuit or equipment
Deng.
Specifically, refering to attached drawing 2, the present embodiment provides a kind of circuit connection diagrams of switch driving circuit, such as Fig. 2 institute
Show:
First driving circuit 101 includes the first triode Q1, the second triode Q2 and the first pull-up circuit 11, described
The collector of first triode Q1, the base stage of the second triode Q2, first pull-up circuit 11 one end with the driving
Output terminals A connection, the emitter of the other end of first pull-up circuit 11 and the second triode Q2 are and power input
C connection is held, the collector of the second triode Q2 is connected to the driving input terminal B, the base stage of the first triode Q1
Access the emitter ground connection of the first driving signal RLY1, the first triode Q1；
Second driving circuit 102 includes third transistor Q3, the 4th triode Q4 and the second pull-up circuit 12, described
The base stage of the collector of third transistor Q3, one end of the second pull-up circuit 12 and the 4th triode Q4 and the driving input terminal
B connection, the other end end of second pull-up circuit 12 and the emitter of the 4th triode Q4 and the power input C connect
It connects, the collector of the 4th triode Q4 is connect with the driving input end B, and the base stage of the third transistor Q3 accesses institute
State the emitter ground connection of the second driving signal RLY2, the third transistor Q3.
Preferably, first pull-up circuit 11 includes first resistor R1, and second pull-up circuit 12 includes the second electricity
Hinder R2.
Preferably, the first triode Q1 and third transistor Q3 is NPN type triode, second triode
Q2 and the 4th triode Q4 is PNP type triode.The certain first triode Q1 and third transistor Q3 can also
For PNP type triode, the second triode Q2 and the 4th triode Q4 are NPN type triode, it is only necessary to corresponding to change
The first driving signal RLY1 and the second driving signal RLY2.
In the present embodiment, using the first triode Q1 and the third transistor Q3 as NPN type triode, described the
Two triode Q2 and the 4th triode Q4 are PNP type triode.For be illustrated.As the first driving signal RLY1
Or second driving signal RLY2 when meeting the first drive condition, the base stage of the first triode Q1 is high level, described the
Three triode Q3 are low level, and first resistor R1 is pull-up resistor effect, provides bias current for the first triode Q1,
Then the first triode Q1 conducting, the third transistor Q3 cut-off, because the emitter of the first triode Q1 is grounded, then
The current collection extremely low level of the first triode Q1, at the same drag down the second triode Q2 base stage and it is described driving it is defeated
The level of outlet A, then the drive output A is low level, the two or the three supervision Q2 conducting, while the power supply signal stream
It is high level through the second triode Q2 to the driving input terminal B, the driving input terminal B.And existing switch driving
The driving method of circuit generallys use the mode of two triodes connection, for example the collector of a triode is connected to another three
The base stage of pole pipe controls the former conducting or turns off to reach the control for obtaining the base stage of the latter (bias current), from
And realize the control of conducting or the shutdown to the latter's triode, the present embodiment is directly to flow through first resistor by power supply signal
R1, thus using acquired electric current as the bias current of the first triode Q1, to realize the conducting of the first triode Q1, phase
Than traditional driving method, this embodiment reduces the uses of other components of triode and resistance, save the life of product
Cost is produced, the fraction defective of product is also reduced.
Specifically, first drive condition is that the first driving signal RLY1 is high level signal and described second drives
Dynamic signal RLY2 is low level, and second drive condition is that the first driving signal RLY1 is low level and described second drives
Dynamic signal RLY2 is high level signal.
Wherein, first drive condition is two opposite drive conditions with second drive condition, in other words,
The first driving signal RLY1 is two opposite signals with the second driving signal RLY2.So that when first driving
When circuit 101 works, second driving circuit 102 does not work, when second driving circuit 102 work, described first
Driving circuit 101 does not work.It should be noted that the first driving signal RLY1 and second driving in the present embodiment
Signal RLY2 is not simultaneously high level；When the first driving signal RLY1 and the second driving signal RLY2 is high level
When, the first triode Q1, the second triode Q2, third transistor Q3 and the 4th triode Q4 are simultaneously turned on, and cause the electricity
Source is directly grounded by triode, so that the triode in breakdown switch driving circuit, causes the damage of circuit.When described first
When driving signal RLY1 and the second driving signal RLY2 are low level, the driving input terminal B of the switch driving circuit with
Drive output A is low level namely the driving circuit without output.
Specifically, the switch driving circuit 100 further includes 3rd resistor R3, the 4th resistance R4, the 5th resistance R5 and
Six resistance R6, for carrying out current limit to the switch driving circuit 100；
One end of the 3rd resistor R3 is connect with the base stage of the 4th triode Q4, and the other end and the driving input
Hold B connection；
One end of the 4th resistance R4 is connect with the base stage of the second triode Q2, and the other end and the driving export
Hold A connection；
One end of the 5th resistance R5 is connect with the base stage of the first triode Q1, and other end access described first is driven
Dynamic signal RLY1；
One end of the 6th resistance R6 is connect with the base stage of the third transistor Q3, and other end access described second is driven
Dynamic signal RLY2.
Wherein, size of the current-limiting resistance to branch current where limiting, to prevent electric current, excessive to burn out institute concatenated
Triode, while current-limiting resistance can also play the role of partial pressure.
Specifically, the switch driving circuit 100 further includes connecting with the driving input terminal B and drive output A
Buffer circuit 13 is prevented for limiting the voltage build-up rate of first driving circuit 101 and the second driving circuit 102 because of electricity
Climbing is excessive that circuit is caused to damage for pressure；
The buffer circuit 13 includes the 7th resistance R7 and first capacitor C1, one end of the 7th resistance R7 and described the
One end of one capacitor C1 connects, and the other end of the 7th resistance R7 connects the drive output B, the first capacitor C1's
The other end connects the driving input terminal B.
It should be noted that the buffer circuit 13 of the present embodiment and the driving input terminal B and drive output A
Parallel connection, the switch driving circuit access switch when, driving circuit driving switch realize state transformation when (such as first driving
Circuit switches to the second driving circuit) reverse current can be generated, and the buffer circuit can make the moment of switching component shutdown,
The initial current at the both ends of buffer current is equal to the operating current before shutdown, to prevent that electric current is excessive and breakdown switch driving electricity
Switching tube in road 100.
Specifically, the switch driving circuit includes: in working method
1. when the first driving signal RLY1 is high level, and when the second driving signal RLY2 is low level, described the
The base stage of one triode Q1 is high level, and it is backward that the power supply signal that power vd D is provided through power input C flows through first resistor R1
The first triode Q1 provides bias current, the first triode Q1 conducting, because of the emitter of the first triode Q1
Ground connection, the base stage for the second triode Q2 being connect with the collector of the first triode Q1 and the level of drive output A
It is pulled low to low level, the second triode Q2 conducting, and the second driving signal RLY2 is low level, the three or three pole
Pipe Q3 cut-off, power supply signal flow through the second triode Q2 and improve the level for driving input terminal B to high level, at this time switch driving
The operating mode of circuit 100 is forward conduction.
2. when the first driving signal RLY1 is low level, and when the second driving signal RLY2 is high level, described the
The base stage of three triode Q3 is high level, and it is backward that the power supply signal that power vd D is provided through power input C flows through second resistance R2
The third transistor Q3 provides bias current, the third transistor Q3 conducting, because of the emitter of the third transistor Q1
Ground connection, the base stage for the 4th triode Q4 being connect with the collector of the third transistor Q3 and the level for driving input terminal B
It is pulled low to low level, the 4th triode Q4 conducting, and the first driving signal RLY1 is low level, the one or three pole
Pipe Q1 cut-off, power supply signal flow through the 4th triode Q4 and improve the level of drive output A to high level, at this time switch driving
The operating mode of circuit 100 is reverse-conducting.
3. when the first driving signal RLY1 is low level, and when the second driving signal RLY2 is low level, described the
The base stage of one triode Q1 is low level, and the base stage of the third transistor Q3 is low level, the base of the second triode Q2
Extremely high level, the base stage of the 4th triode Q4 are high level, then the first triode Q1, the second triode Q2, the
Three triode Q3 and the 4th triode Q4 are off state, and the power supply signal that power vd D is provided flows through the through power input C
One resistance R1 and second resistance R2, then the level of drive output A and driving input terminal B are increased to high level, open at this time
Driving circuit 100 is closed not work.
4. when the first driving signal RLY1 be high level, and the second driving signal RLY2 be high level when, the one or three
The base stage of pole pipe Q1 is high level, and the base stage of third transistor Q3 is high level, and the power supply signal that power vd D is provided is defeated through power supply
Biasing is provided to the first triode Q1 and third transistor Q3 after entering to hold C to flow through the first pull-up resistor R1 and second resistance R2
Electric current, the first triode Q1 and third transistor Q3 are on state, because of the first triode Q1 and the three or three pole
The emitter of pipe Q3 is grounded, then the level of the base stage of the second triode Q2 and the 4th triode Q4 is pulled low to low level,
The second triode Q2 and the 4th triode Q4 is also on state, then power supply signal flows through after the second triode Q2 directly
It is directly grounded by third transistor Q3 after flowing through the 4th triode Q4 by the first triode Q1 ground connection or power supply signal,
The triode of switch driving circuit can be breakdown, and switch driving circuit is short-circuit condition at this time.
The embodiment of the invention provides a kind of switch driving circuits, including the first driving circuit and the second driving circuit；Institute
It states the first driving circuit to connect with driving input terminal and drive output, receives the first driving letter in first driving circuit
Number and first driving signal when meeting the first drive condition, the driving input terminal export high level and it is described drive it is defeated
Outlet exports low level；Second driving circuit is connect with driving input terminal and drive output, in the second driving electricity
When road receives the second driving signal and second driving signal the second drive condition of satisfaction, the driving input terminal output is low
Level and drive output output high level.Work when controlling first driving circuit and the second driving circuit difference
Make, i.e., when the first drive circuit works, the second driving circuit does not work, the first driving circuit when the second drive circuit works
It not working, the switch driving circuit of the present embodiment remains powered on compared with state realizes self-locking switch driving circuit with traditional,
It realizes the saving of the energy and protects the effect of circuit.Also, the biased electrical of the triode of the switch driving circuit of the present embodiment
Stream is directly to be obtained by pull-up resistor, with tradition in such a way that triode controls another triode acquisition bias current
Compare, triode negligible amounts used in the switch driving circuit of equivalent technology effect, namely reduce the manufacture of product at
This, while also reducing the fraction defective of product.
Embodiment 2
Referring to Fig. 3, for switch driving circuit of the present invention second embodiment circuit connection diagram, the present embodiment and
Above-mentioned first embodiment is compared, the present embodiment using metal-oxide-semiconductor replace first embodiment in triode, other technical characteristics with it is upper
It is identical to state first embodiment, details are not described herein.
First driving circuit 101 includes the first metal-oxide-semiconductor T1, the second metal-oxide-semiconductor T2 and the first pull-up circuit 11, and described the
The source electrode of one metal-oxide-semiconductor T1, the grid of the second metal-oxide-semiconductor T2, first pull-up circuit 11 one end with the drive output A
Connection, the drain electrode of the other end of first pull-up circuit 11 and the second metal-oxide-semiconductor T2 are connect with power input C, institute
The source electrode for stating the second metal-oxide-semiconductor T2 is connected to the driving input terminal B, grid access the first driving letter of the first metal-oxide-semiconductor T1
Number RLY1, the grounded drain of the first metal-oxide-semiconductor T1；
Second driving circuit 102 includes third metal-oxide-semiconductor T3, the 4th metal-oxide-semiconductor T4 and the second pull-up circuit 12, and described the
The grid of the source electrode of three metal-oxide-semiconductor T3, one end of the second pull-up circuit 12 and the 4th metal-oxide-semiconductor T4 is connect with the driving input terminal B,
The other end end of second pull-up circuit 12 and the drain electrode of the 4th metal-oxide-semiconductor T4 are connect with the power input C, and the described 4th
The source electrode of metal-oxide-semiconductor T4 is connect with the driving input terminal B, and the grid of the third metal-oxide-semiconductor T3 accesses second driving signal
RLY2, the grounded drain of the third metal-oxide-semiconductor T3.
Specifically, the switch driving circuit 100 further includes the 8th resistance R8, the 9th resistance R9, the tenth resistance R10 and
11 resistance R11, for carrying out current limit to the switch driving circuit 100；
One end of the 8th resistance R8 is connect with the grid of the 4th metal-oxide-semiconductor T4, and the other end and the driving input
Hold B connection；
One end of the 9th resistance R9 is connect with the grid of the second metal-oxide-semiconductor T2, and the other end and the driving export
Hold A connection；
One end of the tenth resistance T10 is connect with the grid of the first metal-oxide-semiconductor T1, and other end access described first is driven
Dynamic signal RLY1；
One end of the eleventh resistor R11 is connect with the base stage of the third metal-oxide-semiconductor T3, other end access described second
Driving signal RLY2.
The embodiment of the invention provides a kind of switch driving circuits, including the first driving circuit and the second driving circuit；Institute
It states the first driving circuit to connect with driving input terminal and drive output, receives the first driving letter in first driving circuit
Number and first driving signal when meeting the first drive condition, the driving input terminal export high level and it is described drive it is defeated
Outlet exports low level；Second driving circuit is connect with driving input terminal and drive output, in the second driving electricity
When road receives the second driving signal and second driving signal the second drive condition of satisfaction, the driving input terminal output is low
Level and drive output output high level.Work when controlling first driving circuit and the second driving circuit difference
Make, i.e., when the first drive circuit works, the second driving circuit does not work, the first driving circuit when the second drive circuit works
It not working, the switch driving circuit of the present embodiment remains powered on compared with state realizes self-locking switch driving circuit with traditional,
It realizes the saving of the energy and protects the effect of circuit.Also, the bias current of the metal-oxide-semiconductor of the switch driving circuit of the present embodiment
Be directly to be obtained by pull-up resistor, phase by way of another metal-oxide-semiconductor obtains bias current is controlled metal-oxide-semiconductor with tradition
Than, metal-oxide-semiconductor negligible amounts used in equivalent technology effect, namely the manufacturing cost of product is reduced, while also reducing product
Fraction defective.
Embodiment 3
Referring to Fig. 4, Fig. 4 is a kind of controller circuitry schematic diagram provided by the invention；As shown in figure 4, a kind of controller,
Include:
Relay 200, and
The driving of switch driving circuit 100 as the aforementioned, the relay 200 and the switch driving circuit 100 inputs
Hold B and drive output A connection；
The relay 200 includes coil input end and coil output, and the coil input end includes that coil forward direction is defeated
Enter end and coil reverse input end；
The coil positive input is connect with the driving input terminal of the driving circuit, the coil reverse input end with
The drive output of the driving circuit connects；
The coil output further includes first coil output end and the second coil output；
When the coil positive input is high level and the coil reverse input end is low level, the First Line
Enclose output end work；
When the coil positive input is low level and the coil reverse input end is high level, second line
Enclose output end work.
The embodiment of the invention provides a kind of controller, including switch driving circuit above-mentioned, the switch driving circuits
Including the first driving circuit and the second driving circuit；First driving circuit is connect with driving input terminal and drive output,
It is described when first driving circuit receives the first driving signal and first driving signal meets the first drive condition
It drives input terminal output high level and the drive output exports low level；Second driving circuit and driving input terminal
And drive output connection, the second driving signal and second driving signal, which are received, in second driving circuit meets the
When two drive conditions, the driving input terminal exports low level and the drive output exports high level.Control described
One drive circuit is not worked at the same time with the second driving circuit, i.e., when the first drive circuit works, the second driving circuit does not work,
When the second drive circuit works, the first driving circuit does not work, and the switch driving circuit of the present embodiment is remained powered on traditional
State realizes that self-locking switch driving circuit is compared, and realizes the saving of the energy and protects the effect of circuit.Also, the present embodiment
The triode of switch driving circuit or the bias current of metal-oxide-semiconductor be directly obtained by pull-up resistor, it is logical with tradition
It crosses triode or metal-oxide-semiconductor controls another triode or the mode of metal-oxide-semiconductor acquisition bias current is compared, equivalent technology effect institute
The triode or metal-oxide-semiconductor negligible amounts used, namely the manufacturing cost of product is reduced, while also reducing the bad of product
Rate.
Embodiment 4
Referring to Fig. 5, Fig. 5 is a kind of electronic equipment circuit diagram provided by the invention；As shown in figure 5, a kind of electronics
Equipment, comprising:
Load 300；And
Controller as the aforementioned, the load connect with the first coil output end of the controller and the second coil output
It connects；
The load includes first terminal COM, Second terminal NC and third terminal NO；
The first terminal COM and Second terminal NC is connect with the both ends of second coil output；
The first terminal COM and third terminal NO is connect with the both ends of the first coil output end.
To sum up, the electronic equipment includes aforementioned switches driving circuit, first driving circuit and driving input terminal and
Drive output connection receives the first driving signal in first driving circuit and first driving signal meets first
When drive condition, the driving input terminal exports high level and the drive output exports low level；Second driving
Circuit is connect with driving input terminal and drive output, receives the second driving signal and described the in second driving circuit
When two driving signal meets the second drive condition, the driving input terminal exports low level and drive output output is high
Level.It controls first driving circuit not work at the same time with the second driving circuit, i.e., when the first drive circuit works second
Driving circuit does not work, and when the second drive circuit works, the first driving circuit does not work, the switch driving circuit of the present embodiment
It is remained powered on compared with state realizes self-locking switch driving circuit with traditional, realizes the saving of the energy and protect the work of circuit
With.Also, the bias current of the triode or metal-oxide-semiconductor of the switch driving circuit of the present embodiment is directly to pass through pull-up resistor
It obtains, phase by way of another triode or metal-oxide-semiconductor obtain bias current is controlled triode or metal-oxide-semiconductor with tradition
Than, triode used in equivalent technology effect or metal-oxide-semiconductor negligible amounts, namely reduce the manufacture of the electronic equipment at
This, while also reducing the fraction defective of the electronic equipment.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the application, rather than its limitations；At this
It under the thinking of application, can also be combined between the technical characteristic in above embodiments or different embodiment, step can be with
It is realized with random order, and there are many other variations of the different aspect of the application as described above, for simplicity, they do not have
Have and is provided in details；Although the application is described in detail with reference to the foregoing embodiments, the ordinary skill people of this field
Member is it is understood that it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of skill
Art feature is equivalently replaced；And these are modified or replaceed, each reality of the application that it does not separate the essence of the corresponding technical solution
Apply the range of a technical solution.
Claims (10)
1. a kind of switch driving circuit, which is characterized in that the switch driving circuit includes: the first driving circuit and the second driving
Circuit；
First driving circuit is connect with driving input terminal and drive output, receives first in first driving circuit
When driving signal and first driving signal meet the first drive condition, the driving input terminal output high level and described
Drive output exports low level；
Second driving circuit is connect with driving input terminal and drive output, receives second in second driving circuit
When driving signal and second driving signal meet the second drive condition, the driving input terminal output low level and described
Drive output exports high level.
2. switch driving circuit according to claim 1, which is characterized in that first driving circuit includes the one or three pole
Pipe, the second triode and the first pull-up circuit, the collector of first triode, the base stage of the second triode, described first
One end of pull-up circuit is connect with the drive output, the other end of first pull-up circuit and second triode
Emitter connect with power input, the collector of second triode is connected to the driving input terminal, described
The base stage of one triode accesses the first driving signal, the emitter ground connection of first triode；
Second driving circuit includes third transistor, the 4th triode and the second pull-up circuit, the third transistor
The base stage of collector, one end of the second pull-up circuit and the 4th triode is connect with the driving input terminal, second pull-up
The other end end of circuit and the emitter of the 4th triode are connect with the power input, the collector of the 4th triode
It is connect with the driving input terminal, the base stage of the third transistor accesses second driving signal, the third transistor
Emitter ground connection.
3. switch driving circuit according to claim 1, which is characterized in that first driving circuit includes the first MOS
Pipe, the second metal-oxide-semiconductor and the first pull-up circuit, the source electrode of first metal-oxide-semiconductor, the grid of the second metal-oxide-semiconductor, the first pull-up electricity
The one end on road is connect with the drive output, the drain electrode of the other end of first pull-up circuit and second metal-oxide-semiconductor
It is connect with power input, the source electrode of second metal-oxide-semiconductor is connected to the driving input terminal, the grid of first metal-oxide-semiconductor
The first driving signal, the grounded drain of first metal-oxide-semiconductor are accessed in pole；
Second driving circuit includes third metal-oxide-semiconductor, the 4th metal-oxide-semiconductor and the second pull-up circuit, the source of the third metal-oxide-semiconductor
The grid of pole, one end of the second pull-up circuit and the 4th metal-oxide-semiconductor is connect with the driving input terminal, second pull-up circuit
The drain electrode of other end end and the 4th metal-oxide-semiconductor is connect with the power input, and the source electrode of the 4th metal-oxide-semiconductor and the driving are defeated
Enter end connection, the grid of the third metal-oxide-semiconductor accesses second driving signal, the grounded drain of the third metal-oxide-semiconductor.
4. switch driving circuit according to claim 2 or 3, which is characterized in that first drive condition is described the
One driving signal is high level signal and second driving signal is low level, and second drive condition is first drive
Dynamic signal is low level and second driving signal is high level signal.
5. switch driving circuit according to claim 2 or 3, which is characterized in that first pull-up circuit includes first
Resistance, second pull-up circuit includes second resistance.
6. switch driving circuit according to claim 2, which is characterized in that the switch driving circuit further includes third electricity
Resistance, the 4th resistance, the 5th resistance and the 6th resistance, for carrying out current limit to the switch driving circuit；
One end of the 3rd resistor is connect with the base stage of the 4th triode, and the other end is connect with the driving input terminal；
One end of 4th resistance is connect with the base stage of second triode, and the other end is connect with the drive output；
One end of 5th resistance is connect with the base stage of first triode, and the other end accesses first driving signal；
One end of 6th resistance is connect with the base stage of the third transistor, and the other end accesses second driving signal.
7. switch driving circuit according to claim 3, which is characterized in that the switch driving circuit further includes the 8th electricity
Resistance, the 9th resistance, the tenth resistance and eleventh resistor, for carrying out current limit to the switch driving circuit；
One end of 8th resistance is connect with the grid of the 4th metal-oxide-semiconductor, and the other end is connect with the driving input terminal；
One end of 9th resistance is connect with the grid of second metal-oxide-semiconductor, and the other end is connect with the drive output；
One end of tenth resistance is connect with the grid of first metal-oxide-semiconductor, and the other end accesses first driving signal；
One end of the eleventh resistor is connect with the base stage of the third metal-oxide-semiconductor, and the other end accesses second driving signal.
8. switch driving circuit according to claim 1, which is characterized in that the switch driving circuit further include with it is described
The buffer circuit for driving input terminal and drive output connection, for limiting first driving circuit and the second driving circuit
Voltage build-up rate is prevented because circuit damages caused by voltage build-up rate is excessive；
The buffer circuit includes the 7th resistance and first capacitor, one end and one end of the first capacitor of the 7th resistance
Connection, the other end of the 7th resistance connect the drive output, and the other end of the first capacitor connects the driving
Input terminal.
9. a kind of controller characterized by comprising
Relay, and
Such as the described in any item switch driving circuits of claim 1-8, the driving of the relay and the switch driving circuit
Input terminal and drive output connection；
The relay includes coil input end and coil output, and the coil input end includes coil positive input and line
Enclose reverse input end；
The coil positive input is connect with the driving input terminal of the driving circuit, the coil reverse input end with it is described
The drive output of driving circuit connects；
The coil output further includes first coil output end and the second coil output；
When the coil positive input is high level and the coil reverse input end is low level, the first coil is defeated
Outlet work；
When the coil positive input is low level and the coil reverse input end is high level, second coil is defeated
Outlet work.
10. a kind of electronic equipment characterized by comprising
Load；And
Controller as claimed in claim 9, the load are defeated with the first coil output end of the controller and the second coil
Outlet connection；
The load includes first terminal, Second terminal and third terminal；
The first terminal and Second terminal are connect with the both ends of second coil output；
The first terminal and third terminal are connect with the both ends of the first coil output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416643.9A CN109412570A (en) | 2018-11-26 | 2018-11-26 | A kind of switch driving circuit, controller and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811416643.9A CN109412570A (en) | 2018-11-26 | 2018-11-26 | A kind of switch driving circuit, controller and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN109412570A true CN109412570A (en) | 2019-03-01 |
Family
ID=65455541
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811416643.9A Pending CN109412570A (en) | 2018-11-26 | 2018-11-26 | A kind of switch driving circuit, controller and electronic equipment |
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| US4943741A (en) * | 1989-05-24 | 1990-07-24 | National Semiconductor Corporation | ECL/CML emitter follower current switch circuit |
| CN2852534Y (en) * | 2005-12-12 | 2006-12-27 | 深圳艾科创新微电子有限公司 | High-speed segmented current type DAC circuit |
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Application publication date: 20190301 |