CN207995055U - A kind of driving circuit and motor driver of power switch - Google Patents
A kind of driving circuit and motor driver of power switch Download PDFInfo
- Publication number
- CN207995055U CN207995055U CN201820348296.XU CN201820348296U CN207995055U CN 207995055 U CN207995055 U CN 207995055U CN 201820348296 U CN201820348296 U CN 201820348296U CN 207995055 U CN207995055 U CN 207995055U
- Authority
- CN
- China
- Prior art keywords
- driving
- power switch
- branch
- circuit
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The utility model discloses a kind of driving circuit of power switch and motor drivers, including：First driving branch, the driving current output for that will input；Second driving branch, drives branch circuit parallel connection, for being exported after being amplified the driving current of input with described first；Driving unit, drive branch and second that branch is driven to connect power switch via described first, the driving current of the driving unit output is divided into after two parts drive branch, the second driving branch via first respectively carries out electric current superposition to drive the power switch again.Since the driving current of output is divided into two parts, one part of current directly exports, it is exported after another part Current amplifier, in this way, the ability of driving unit on the one hand can be fully utilized, most of ability of waste driving chip is solved the problems, such as, on the other hand, the electric current for being diverted to the second driving branch is obviously reduced compared with prior art, therefore reduces the requirement to switching tube ability in the second driving branch, reduces device size and cost.
Description
Technical field
The utility model is related to the drivings of the driving circuit and motor of technical field of motors more particularly to a kind of power switch
Device.
Background technology
To high-power MOS (metal oxide semiconductor, metal oxide semiconductor field-effect crystalline substance
Body pipe) or IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) drive when, often
It is driven frequently with driving chip.If the fan-out capability of driving chip drives MOS IGBT enough, using by driving
Chip is directly connected to metal-oxide-semiconductor or the control pole of IGBT by resistance, as shown in Figure 1.When driving chip fan-out capability not
When being enough driving power metal-oxide-semiconductor or IGBT, usually using the method for increasing primary current amplifying circuit, as shown in Figure 2.
When using primary current amplifying circuit driving metal-oxide-semiconductor or IGBT, due to driving needed for the current amplification circuit
The electric current wanted is very small, is milliampere rank, and the fan-out capability of driving chip is ampere grade, leads to most of energy of driving chip
Power wastes.In addition, in order to meet the driving of power MOS pipe or IGBT, the pipe of Current amplifier needs to select electric current sufficiently large
, cause cost to increase, size increases.
Utility model content
The technical problem to be solved by the present invention is to for most of ability of the above-mentioned driving chip of the prior art
Waste, and the defect that current amplification circuit size is big, of high cost, provide a kind of driving circuit of power switch.
Technical solution adopted by the utility model to solve its technical problems is：Construct a kind of driving electricity of power switch
Road, including：
First driving branch, the driving current output for that will input；
Second driving branch, it is rear defeated for the driving current of input to be amplified with the first driving branch circuit parallel connection
Go out；
Driving unit drives branch and the second driving branch to connect power switch via described first；The driving unit
The driving current of output is divided into after two parts drive branch via the first driving branch, second respectively carries out electric current superposition to drive again
Move the power switch.
In driving circuit described in the utility model, the second driving branch includes first resistor, push-pull circuit, the
Two resistance, the output end of the first end connection driving unit of first resistor, the second end of first resistor are connected via push-pull circuit
The first end of second resistance, the control terminal of the second end connection power switch of second resistance.
In driving circuit described in the utility model, the push-pull circuit includes first switch pipe and second switch pipe,
Input terminal as entire push-pull circuit after the control terminal of first switch pipe and second switch pipe connects altogether, the output of first switch pipe
Output end after holding the input terminal with second switch pipe to connect altogether as entire push-pull circuit, the input termination power supply of first switch pipe
The output end of power supply, second switch pipe is grounded or connects negative voltage.
In driving circuit described in the utility model, the first switch pipe is NPN type triode, the second switch
Pipe is the triode of positive-negative-positive.
In driving circuit described in the utility model, the first driving branch includes a 3rd resistor.
In driving circuit described in the utility model, the driving unit includes driving chip.
In driving circuit described in the utility model, the power switch is insulated gate bipolar transistor IGBT.
In driving circuit described in the utility model, the power switch is that Metal-Oxide Semiconductor field-effect is brilliant
Body pipe MOSFET.
The invention also discloses a kind of motor drivers, include the driving circuit of the power switch.
The driving circuit and motor driver for implementing the power switch of the utility model, have the advantages that：This
The driving current that driving unit exports in utility model is divided into two parts, and passes through two driving branches, one part of current respectively
It directly exports, is exported after another part Current amplifier, in this way, on the one hand can completely utilize the ability of driving unit, solved
The problem of most of ability of waste driving chip, on the other hand, it is diverted to the electric current and the prior art of the second driving branch
Compared to being obviously reduced, therefore reduce the requirement to the switching tube ability in the second driving branch, reduce device size and at
This.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer：
Fig. 1 is the structural schematic diagram that driving chip directly drives metal-oxide-semiconductor schematic diagram in the prior art；
Fig. 2 is to use driving circuit of the push-pull circuit as current amplification circuit in the prior art；
Fig. 3 is the structural schematic diagram of the driving circuit of the power switch of the utility model；
Fig. 4 is the circuit diagram of the preferred embodiment of the utility model.
Specific implementation mode
The utility model is more fully retouched below with reference to relevant drawings for the ease of understanding the utility model,
It states.The exemplary embodiments of the utility model are given in attached drawing.But the utility model can in many different forms come in fact
It is existing, however it is not limited to embodiment described herein.Make public affairs to the utility model on the contrary, purpose of providing these embodiments is
It is more thorough and comprehensive to open content.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with the technology for belonging to the utility model
The normally understood meaning of technical staff in domain is identical.Terminology used in the description of the utility model herein only be
The purpose of description specific embodiment, it is not intended that in limitation the utility model.
The term comprising ordinal number such as " first " that is used in this specification, " second " can be used for illustrating various inscapes,
But these inscapes are not limited by these terms.It is only that using the purpose of these terms and distinguishes an inscape
In other inscapes.For example, under the premise of not departing from the interest field of the present invention, the first inscape can be named as the
Two inscapes, similarly, the second inscape can also be named as the first inscape.
The total thinking of the utility model is：The driving current that driving unit exports is divided into two parts respectively via mutually simultaneously
Electric current superposition is carried out again after two driving branches of connection, and the current drive power switch after superposition is one of to drive branch straight
It connects and exports the electric current of input, another driving branch exports after being amplified the electric current of input, the electric current after being superimposed in this way
The driving to power switch can be met, the ability of driving unit can be completely utilized, solve the big of waste driving chip
The problem of partial capability, while the electric current being diverted in the driving branch for carrying out Current amplifier reduces compared with prior art,
Therefore the requirement to the switching tube ability in the driving branch is reduced, device size and cost are reduced.
In order to better understand the above technical scheme, in conjunction with appended figures and specific embodiments to upper
It states technical solution to be described in detail, it should be understood that the specific features in the utility model embodiment and embodiment are to this
Apply for the detailed description of technical solution, rather than to the restriction of technical scheme, in the absence of conflict, this practicality
Technical characteristic in new embodiment and embodiment can be combined with each other.
With reference to figure 3, the driving circuit of the utility model includes：
First driving branch 100, the driving current output for that will input；
Second driving branch 200, it is in parallel with the first driving branch 100, for the driving current of input to be put
Output after big；
Driving unit 300 drives branch 100 and second that branch 200 is driven to connect power switch, and institute via described first
The driving current for stating the output of driving unit 300 is divided into two parts respectively via the first driving driving branch 200 of branch 100, second
Electric current superposition is carried out again afterwards to drive the power switch.
With reference to figure 4, in preferred embodiment, the driving unit includes driving chip, and the power switch is IGBT, is such as schemed
Shown in middle Q3.The second driving branch 200 includes first resistor R1, push-pull circuit, second resistance R3.The first driving branch
Road 100 includes a 3rd resistor R3.Wherein, the output end of the first end connection driving chip of first resistor R1, first resistor
The second end of R1 is via the first end of push-pull circuit connection second resistance R2, the second end connection power switch Q3 of second resistance R2
Gate pole.
Push-pull circuit is mainly amplified electric current, and push-pull circuit described in the present embodiment includes opposite polarity three pole
Pipe Q1, Q2, triode Q1 are NPN type triode, and triode Q2 is PNP type triode.The base stage of triode Q1 and triode Q2
The emitter of input terminal after connecing altogether as entire push-pull circuit, triode Q1 and triode Q2 are used as after connecing altogether and entirely recommend electricity
The output end on road, the collector of triode Q1 meet power supply VCC, the grounded collector GND of triode Q2 or connect negative voltage
VEE。
It is understood that power switch Q3 can also be that MOSFET, triode Q2, Q3 can also be other transistors.
The operation principle of the present embodiment is：With reference to the arrow in figure 4, arrow indicates the electric current side of two driving branches respectively
To a gate pole for directly passing through resistance R3 to Q3 from driving chip pin VO sets its current drive capability as I1, another
It is connected to the base stage recommended to pipe Q1, Q2 by resistance R1, recommends the door that resistance R2 connections Q3 is passed through to the emitter of pipe Q1, Q2
Pole sets its current drive capability as I2, in order to reach and identical current drive capability I in Fig. 1,2, it is only necessary to the two drives
It moves branch road current drive capability and reaches, i.e. I=I1+I2, therefore I1 and I2 are smaller than total driving energy of setting
Power I.Electric current I2 can be used as the type selecting standard of push-pull circuit in this way in type selecting, rather than the electric current I of traditional circuit, to
Meet design requirement with smaller specification.By taking some design as an example, driving IGBT needs the peak drive current of 4A, and drives core
Piece can only provide the peak drive current of 2A, and the electric current usually used is circuit shown in Fig. 2, and electric current is carried out using push-pull circuit
Amplification needs the peak drive current of 4A since driving amounts to, so in Fig. 2 when selecting triode, needs to want by >=4A
Seek carry out type selecting.And if using circuit as shown in Figure 4, since driving chip itself can provide the current drive capability of 2A, detain
Except the smaller portions (such as 0.1A) flowed through from push-pull circuit gate leve, then additional 2.1A driving currents are provided by push-pull circuit
(i.e. the VO of driving chip exports 2A in total, and wherein 1.9A is exported by path 100, and in addition 0.1A is enlarged by path 200
2.1A is exported, and it is 1.9+2.1A, i.e. 4A to amount to output), the device of more small dimension can be selected to reduce cost in this way.
Based on same design, the invention also discloses a kind of motor drivers, using power switch as described above
Driving circuit.
In conclusion implementing the driving circuit and motor driver of the power switch of the utility model, have with following
Beneficial effect：The driving current that driving unit exports in the utility model is divided into two parts, and passes through two driving branches respectively, and one
Portion of electrical current directly exports, and is exported after another part Current amplifier, in this way, on the one hand can completely utilize the energy of driving unit
Power solves the problems, such as most of ability of waste driving chip, on the other hand, is diverted to the electric current of the second driving branch and shows
There is technology to compare to be obviously reduced, therefore reduce the requirement to the switching tube ability in the second driving branch, reduces device ruler
Very little and cost.
Described " connected " or " connection " herein includes not only being connected directly two entities, also includes passing through tool
It is indirectly connected beneficial to other entities of improvement.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific implementation mode stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, these are belonged within the protection of the utility model.
Claims (9)
1. a kind of driving circuit of power switch, which is characterized in that including：
First driving branch, the driving current output for that will input；
Second driving branch, drives branch circuit parallel connection, for being exported after being amplified the driving current of input with described first；
Driving unit drives branch and the second driving branch to connect power switch via described first；
The driving current of the driving unit output is divided into two parts and drives branch, the second driving branch via described first respectively
Electric current superposition is carried out again afterwards to drive the power switch.
2. the driving circuit of power switch according to claim 1, which is characterized in that the second driving branch includes the
One resistance, push-pull circuit, second resistance, the first end of the first resistor connect the output end of the driving unit, and described
The second end of first resistor connects the first end of the second resistance, the second end of the second resistance via the push-pull circuit
Connect the control terminal of the power switch.
3. the driving circuit of power switch according to claim 2, which is characterized in that the push-pull circuit is opened including first
Close pipe and second switch pipe, the control terminal of the first switch pipe and second switch pipe connect altogether after as the defeated of entire push-pull circuit
Enter end, output as entire push-pull circuit after the output end of the first switch pipe and the input terminal of second switch pipe connect altogether
The input at end, the first switch pipe terminates power supply, and the output end of the second switch pipe is grounded or connects negative voltage.
4. the driving circuit of power switch according to claim 3, which is characterized in that the first switch pipe is NPN type
Triode, the second switch pipe are PNP type triode.
5. the driving circuit of power switch according to claim 1, which is characterized in that the first driving branch includes one
A 3rd resistor.
6. the driving circuit of power switch according to claim 1, which is characterized in that the driving unit includes driving core
Piece.
7. the driving circuit of power switch according to claim 1, which is characterized in that the power switch is that insulated gate is double
Bipolar transistor IGBT.
8. the driving circuit of power switch according to claim 1, which is characterized in that the power switch is metal-oxygen
Compound semiconductor field effect transistor MOSFET.
9. a kind of motor driver, which is characterized in that include the driving of the power switch as described in any one of claim 1-8
Circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820348296.XU CN207995055U (en) | 2018-03-14 | 2018-03-14 | A kind of driving circuit and motor driver of power switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820348296.XU CN207995055U (en) | 2018-03-14 | 2018-03-14 | A kind of driving circuit and motor driver of power switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207995055U true CN207995055U (en) | 2018-10-19 |
Family
ID=63826980
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820348296.XU Active CN207995055U (en) | 2018-03-14 | 2018-03-14 | A kind of driving circuit and motor driver of power switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207995055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293860A (en) * | 2020-03-20 | 2020-06-16 | 电子科技大学 | High-side conductance enhanced power switch driving circuit |
-
2018
- 2018-03-14 CN CN201820348296.XU patent/CN207995055U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111293860A (en) * | 2020-03-20 | 2020-06-16 | 电子科技大学 | High-side conductance enhanced power switch driving circuit |
| CN111293860B (en) * | 2020-03-20 | 2021-12-03 | 电子科技大学 | High-side conductance enhanced power switch driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7969226B2 (en) | High temperature gate drivers for wide bandgap semiconductor power JFETs and integrated circuits including the same | |
| CN109494969A (en) | A kind of driving circuit of manufacturing silicon carbide semiconductor field-effect tube | |
| US20230291399A1 (en) | Miller clamping device for parallel switching transistors and driver comprising same | |
| JPS60501682A (en) | Parallel MOSFET power switch circuit | |
| US8471606B2 (en) | Driver circuit for a semiconductor power switch | |
| CN207995055U (en) | A kind of driving circuit and motor driver of power switch | |
| JPS62254460A (en) | Bi-cmos logic circuit | |
| JPH06103837B2 (en) | Tri-state output circuit | |
| CN109921779B (en) | Half-bridge circuit through protection circuit | |
| JP2004080778A (en) | Circuit device for driving power semiconductor transistor | |
| CN103023470B (en) | Three electrode one-way conduction field effect transistor | |
| Parpia et al. | A novel CMOS-compatible high-voltage transistor structure | |
| TW201411809A (en) | Power MOSFET element | |
| CN210273596U (en) | Automatic switching device for double power supply | |
| CN209134378U (en) | Low-cost and high-performance switch tube driving circuit | |
| CN215581091U (en) | IGBT gate pole drive circuit | |
| KR920009708B1 (en) | Semiconductor logic circuit | |
| CN210273824U (en) | High-speed drive circuit of field control type power electronic device | |
| CN212323981U (en) | Novel MOS tube isolation driving circuit | |
| CN109149913A (en) | Metal-oxide-semiconductor driving circuit | |
| CN206135865U (en) | Metal oxide semiconductor field effect transistor (MOSFET) driving circuit | |
| CN112422089A (en) | High-power IGBT drive control circuit and method | |
| CN206332608U (en) | A kind of IGBT resistances adjusted circuit | |
| CN211880296U (en) | Driving circuit | |
| CN216625709U (en) | High-voltage driving circuit of high-power field effect transistor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 215000 52 tianedang Road, Yuexi, Wuzhong District, Suzhou City, Jiangsu Province Patentee after: Suzhou Huichuan United Power System Co.,Ltd. Address before: 215000 52 tianedang Road, Yuexi Town, Wuzhong District, Suzhou City, Jiangsu Province Patentee before: SUZHOU HUICHUAN UNITED POWER SYSTEM Co.,Ltd. |
|
| CP03 | Change of name, title or address |