CN106209046A - A kind of direct current controlled transient response disconnecting switch - Google Patents
A kind of direct current controlled transient response disconnecting switch Download PDFInfo
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- CN106209046A CN106209046A CN201610748374.0A CN201610748374A CN106209046A CN 106209046 A CN106209046 A CN 106209046A CN 201610748374 A CN201610748374 A CN 201610748374A CN 106209046 A CN106209046 A CN 106209046A
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- 230000004044 response Effects 0.000 title claims abstract description 19
- 230000001052 transient effect Effects 0.000 title claims abstract description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 57
- 239000003054 catalyst Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000002955 isolation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
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- 230000003044 adaptive effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000036772 blood pressure Effects 0.000 description 1
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- 230000003111 delayed effect Effects 0.000 description 1
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Classifications
-
- 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
- H03K17/687—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 the devices being field-effect transistors
- H03K17/689—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 the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/04—Modifications for accelerating switching
- H03K17/041—Modifications for accelerating switching without feedback from the output circuit to the control circuit
- H03K17/04106—Modifications for accelerating switching without feedback from the output circuit to the control circuit in field-effect transistor switches
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Abstract
Direct current controlled transient response disconnecting switch, including optocoupler, insulating power supply module and double-direction control metal-oxide-semiconductor, described optocoupler input is provided with the first pin for incoming level signal, second pin ground connection of optocoupler input, the 4th pin of insulating power supply module and optocoupler outfan is connected as optocoupler and powers；Double-direction control metal-oxide-semiconductor includes metal-oxide-semiconductor 1 and metal-oxide-semiconductor 2, the source electrode of metal-oxide-semiconductor 1 and the source electrode of metal-oxide-semiconductor 2 connect, 3rd pin of optocoupler outfan is connected with grid, the grid of metal-oxide-semiconductor 2 of metal-oxide-semiconductor 1, the drain electrode of metal-oxide-semiconductor 1, the drain electrode of metal-oxide-semiconductor 2 are connected with the two ends of external circuits respectively, and insulating power supply module passes through energization pins external direct current power supply.The fast response time of this disconnecting switch, can realize two-way shutoff, without bounce-back, with little need for driving power consumption, and leakage current, and can be according to using demand energy flexible configuration metal-oxide-semiconductor, it is adaptable in AC or DC circuit.
Description
Technical field
The invention belongs to the technical field of on-off control, be specifically related to a kind of direct current controlled transient response disconnecting switch.
Background technology
At present, on-off control field, conventional is mainly several types such as optocoupler, relay, catalyst, load switch.
Wherein optical coupled switch is applicable to signal circuit, and it is the device carrying out transmitting telecommunication number with light for medium, when input power up signal
Time luminous organ emit beam, light-receiving device just produces photoelectric current after accepting light, from outfan flow out, it is achieved thereby that " electricity-
Optical-electronic " conversion, with light for medium, input end signal is coupled to the photoelectrical coupler of outfan, owing to it has switch off time
Short, can reach Microsecond grade, volume is little, life-span length, contactless, and capacity of resisting disturbance is strong, insulate between exporting and inputting, one-way transmission
The advantages such as signal, obtain in digital circuit and are widely applied.Relay-type switchs be applicable to 220V alternating current on-off circuit,
It is a kind of common electronic control device, and it has control system (also known as input circuit) and by control system (also known as output
Loop), it is commonly used in automatic control circuit, it actually goes to control the one of larger current " certainly with less electric current
Dynamic switch ", thus play in circuit be automatically adjusted, safeguard protection, the effect such as change-over circuit；It is widely used in remote control, remote measurement, leads to
Interrogate, automatically control, in electromechanical integration and power electronic equipment, be one of most important control element.Catalyst is applicable to greatly
Power AC-DC Circuit, can fast shut-off exchange and direct current major loop and can being frequently switched on and the dress of big current control circuit
Putting, also being used as controlling shop equipment electric heater machine-tool with each as control object so often applying to motor
The electrical loads such as sample electric power unit, catalyst can not only be switched on and off circuit, but also has low-voltage release guard effect；
Catalyst control capability is big, it is adaptable to frequent operation and distant control, is one of element important in automatic control system.Negative
Load switch simple in construction, has simple arc-control device, can cut off rated load current and certain overcurrent, but can not cut
Disconnected short circuit current；Typically it is used together with fuse, replaces chopper.Load switch chip is all that power taking is in electricity the most on the market
Road major loop, is unidirectionally controlled and cut-offs.
Although but photo-coupler response time is short, Microsecond grade can be reached, but its current carrying capacities is not strong, order of magnitude base
This is in milliampere level, and unilateal conduction, typically output can only have pressure drop；Relay be use hardware connection realize, line many and
Complexity, volume is big, and power consumption is big, and motility and extensibility are little, and switch time is long, and its order of magnitude is at ten Milliseconds, galvanization energy
Power can reach several amperes, even tens amperes, but is typically to apply for 220V alternating current, and for unidirectional current, maximum is also
With regard to two or three ampere, and pressure less than 30V；The through-current capability of catalyst can reach hundreds of ampere, and resistance to DC voltage also may be used
To reach a few hectovolt, but expensive, and bulky, channel time is long, and the order of magnitude has reached ten milliseconds of ranks；Load switch
Although simple in construction, but it lacks overtemperature protection, it is impossible to turns off short circuit current, not only loads when short-circuit conditions, loads out
Close and damage, and owing to power overload situation shutoff can make whole device, system cisco unity malfunction.Above-mentioned several switch is to application model
Enclose and occasion limited, the occasion that cannot be used for tens volts of voltages having, and the inapplicable and upper hectovolt unidirectional current having or
The lowest situation for several amperes of person's electric current, and be required for greatly driving power switch could run use.
Therefore, traditional several switches have bigger limitation, not only function singleness, and are of limited application, and become
This is the highest.
Summary of the invention
The invention aims to solve the problems referred to above, it is provided that the higher controlled transient response of direct current of a kind of practicality every
Leave pass.
In order to reach foregoing invention purpose, the present invention by the following technical solutions:
Direct current controlled transient response disconnecting switch, including optocoupler, insulating power supply module and double-direction control metal-oxide-semiconductor, described light
Coupling input is provided with the first pin for incoming level signal, the second pin ground connection of optocoupler input, insulating power supply module
It is connected as optocoupler with the 4th pin of optocoupler outfan to power；Double-direction control metal-oxide-semiconductor includes metal-oxide-semiconductor 1 and metal-oxide-semiconductor 2, metal-oxide-semiconductor 1
The source electrode of source electrode and metal-oxide-semiconductor 2 connects, and the 3rd pin of optocoupler outfan is connected with grid, the grid of metal-oxide-semiconductor 2 of metal-oxide-semiconductor 1,
The drain electrode of metal-oxide-semiconductor 1, the drain electrode of metal-oxide-semiconductor 2 are connected with the two ends of external circuits respectively, and insulating power supply module is by outside energization pins
Connect DC source.I/O signal pins (the i.e. first pin) be used for receive single-chip microcomputer or other low and high level signals, switch sections by
Two-way admittance metal-oxide-semiconductor forms, and two-way admittance L+, L-connect external circuits, the level signal received by I/O perform to open or
The instruction turned off, thus reach the purpose of voltage x current isolation in circuit.
Further, described metal-oxide-semiconductor 1 and metal-oxide-semiconductor 2 are enhancement mode NMOS tube.
Further, described disconnecting switch also includes package casing, described optocoupler, insulating power supply module and double-direction control MOS
Pipe is located in package casing.
Further, described DC source is 3.3V-24V.
Further, external DC source is converted to 9V power supply supply optocoupler by described insulating power supply module.
Further, described single-chip microcomputer or other low and high level signals are more than 2V.
Further, load is connect between the 3rd pin and the output ground wire pin of insulating power supply module of described optocoupler outfan
Resistance.
The present invention compared with prior art, provides the benefit that:
1. fast response time, reaches Microsecond grade, as requested, and the optocoupler of optional corresponding speed is portable strong；
2. can realize two-way shutoff, without bounce-back；
3. with little need for driving power consumption, leakage current；
4. the scope of application switched contains tens volts and arrives several hectovolts, and several peaces arrive the market product vacancy of a few abampere again；
5. the volume of switch is little, manufactures and use cost is low；
6. conducting resistance is little；
7. can be suitable for different use demand by flexible configuration metal-oxide-semiconductor；
8. during this disconnecting switch can be simultaneously suitable for AC or DC circuit.
Accompanying drawing explanation
Fig. 1 is the disconnecting switch structural representation of the present invention；
Fig. 2 is the disconnecting switch working state schematic representation of the present invention；
Fig. 3 is the disconnecting switch service time oscillogram of the present invention；
Fig. 4 is the disconnecting switch turn-off time oscillogram of the present invention.
Detailed description of the invention
Below by specific embodiment, technical scheme is further described explanation.
As it is shown in figure 1, disconnecting switch is mainly made up of an insulating power supply module, double-direction control metal-oxide-semiconductor, optocoupler.Wherein,
Energization pins passes through external direct current power supply, is powered to optocoupler by isolating switch power module；I/O signal pins is used for receiving list
Sheet machine or other low and high level signals, optocoupler powered by power module, and receives I/O level signal and control to carry out break-make
Two-way admittance metal-oxide-semiconductor opens shutoff；Switch sections is made up of two-way admittance metal-oxide-semiconductor, and the two ends L+, L-of two-way admittance metal-oxide-semiconductor connect
External circuits, the signal received by I/O is performed the instruction being switched on or off, thus reaches voltage x current isolation in circuit
Purpose.
The optocoupler input of disconnecting switch is provided with the first pin for incoming level signal (I/O signal), and optocoupler inputs
Second pin ground connection of end, the 4th pin of insulating power supply module and optocoupler outfan is connected as optocoupler and powers；Double-direction control MOS
Pipe includes metal-oxide-semiconductor 1 and metal-oxide-semiconductor 2, and the source electrode of metal-oxide-semiconductor 1 and the source electrode of metal-oxide-semiconductor 2 connect, the 3rd pin and MOS of optocoupler outfan
The grid of pipe 1, the grid of metal-oxide-semiconductor 2 connect, and the drain electrode of metal-oxide-semiconductor 1, the drain electrode of metal-oxide-semiconductor 2 are connected with the two ends of external circuits respectively.
Insulating power supply module has the effect of security isolation and voltage transformation, and voltage transformation includes that boosting inverter, blood pressure lowering become
Change, AC-DC conversion (AC/DC, DC/AC), reversal (positive-negative polarity conversion, the conversion of single supply and positive-negative power, single supply
With many Power convert).At the external circuits that I/O signal pins, energization pins relation control pin control, the magnitude of voltage energy of isolation
Reach 1kV.
If Fig. 2 is disconnecting switch operating diagram.Wherein isolating switch power module by extraneous DC source or other
DC power supplier 3.3V～24V power voltage supply, be converted to 9V voltage by power module and export and power to optocoupler, and 9V voltage is defeated
Go out to adapt to metal-oxide-semiconductor drive voltage range requirement.Select the reason of 9V:
1:5V is improper, and the output of 5V voltage makes metal-oxide-semiconductor service time slow, and ratio is in 9V voltage output mos pipe is opened
Resistance wants big；
2:7V is improper, and the power module of 7V voltage output is sparser at ratio on the market, is difficult to find；
More than 3:12V is improper, and the output of 12V voltage makes the metal-oxide-semiconductor turn-off time slack-off, so can affect control performance；
In sum select 9V voltage output can control metal-oxide-semiconductor open, the turn-off time the shortest, promote disconnecting switch
Energy.DC power supplier 3.3V～24V voltage are powered to power module, and insulating power supply module output voltage 9V, to optocoupler, makes light
Coupling one end keeps high level 9V.I/O signal by single-chip microcomputer to level signal or give manually more than level signal 2V to every
Leaving pass I/O signal pins (being applicable to the most all of single-chip microcomputer at present), optocoupler is by receiving I/O incoming level signal control
Optocoupler break-make processed, during optocoupler conducting, the grid of two-way admittance metal-oxide-semiconductor is high level 9V, thus controls two-way admittance metal-oxide-semiconductor break-make.
L+, L-pin meets external circuits, and L+, L-can external two-way generating positive and negative voltage, can realize two-way by above circuit design
Control.Have employed insulating power supply module so that disconnecting switch is not from the power taking of main circuit loop, and this is in test system application circuit
Critically important.
Disconnecting switch module controls insulating power supply module two-way admittance metal-oxide-semiconductor on or off by control circuit, without leakage
Electricity, thus realize controlling the function that external circuit is switched on or off.Do not have between input circuit and the output loop of this disconnecting switch
Have electrical link, the most altogether, between distribution capacity minimum, and insulation resistance is very big, and therefore between loop, interference is basic
Do not have, it is to avoid the generation of the interference signal of common-impedance coupling.Insulating power supply module is to the 4th pin continued power of optocoupler, I/
O level signal is drawn high by external signal level to drag down and is controlled optocoupler and open shutoff, and optical coupled switch pin opens shutoff control
Two-way admittance metal-oxide-semiconductor Gate pin (namely grid) level is drawn high and is dragged down, thus controls two-way admittance metal-oxide-semiconductor and open shutoff.
I/O signal pins and energization pins external control circuit reach to control the purpose of external circuits.
Fig. 3 be disconnecting switch to I/O signal service time oscillogram, Fig. 4 is off time waveform figure.Work as list as seen from the figure
When sheet machine is to disconnecting switch I/O signal, it is all Microsecond grade that disconnecting switch turns on and off response time.Service time only has 10
Microseconds, the turn-off time also only has 200 microseconds, and open, time of turning off can be according to the need of field of employment
Want, select different optocouplers to adapt to switching speed demand, several microsecond can be brought up to, fully achieve the merit of transient response
Energy.
The concrete operation step of this disconnecting switch is as follows: supply voltage inputs, the input power supply of 3.3V～24V DC voltage；
Send control signal more than high level 2V to disconnecting switch I/O interface, control disconnecting switch break-make.The most all of list
Sheet machine is the most adaptive.
The voltage and current scope of this disconnecting switch energy can be arranged by the inside optocoupler and MOS type selecting, the amount being suitable for
Level interval is contained tens volts and is arrived several hectovolts, and several peaces arrive the market product vacancy of a few abampere again.Disconnecting switch carries out opening shutoff
Time no-delay, without delayed, transient response, it is achieved that cut-off without bounce-back.Insulating power supply module for power supply, I/O signal controls optocoupler and opens
Disconnected, optocoupler control two-way admittance metal-oxide-semiconductor is opened shutoff and is realized.Direct current refers to that input power is DC source, controlled finger I/O level
Signal controls, and the most whole disconnecting switch direct current is controlled.
If no special instructions, the element employed in embodiments of the invention is element commonly used in the art.It is more than
The preferred embodiment of the present invention, does not limit protection scope of the present invention, for those skilled in the art according to the present invention's
Deformation that mentality of designing is made and improvement, within all should being considered as protection scope of the present invention.
Claims (7)
1. direct current controlled transient response disconnecting switch, including optocoupler, insulating power supply module and double-direction control metal-oxide-semiconductor, described optocoupler
Input is provided with the first pin for incoming level signal, the second pin ground connection of optocoupler input, insulating power supply module with
4th pin of optocoupler outfan is connected as optocoupler and powers；Double-direction control metal-oxide-semiconductor includes metal-oxide-semiconductor 1 and metal-oxide-semiconductor 2, the source of metal-oxide-semiconductor 1
The source electrode of pole and metal-oxide-semiconductor 2 connects, and the 3rd pin of optocoupler outfan is connected with grid, the grid of metal-oxide-semiconductor 2 of metal-oxide-semiconductor 1, MOS
The drain electrode of pipe 1, the drain electrode of metal-oxide-semiconductor 2 are connected with the two ends of external circuits respectively, and insulating power supply module is external directly by energization pins
Stream power supply.
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that described metal-oxide-semiconductor 1 and MOS
Pipe 2 is enhancement mode NMOS tube.
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that described disconnecting switch is also wrapped
Including package casing, described optocoupler, insulating power supply module and double-direction control metal-oxide-semiconductor are located in package casing.
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that described DC source is
3.3V-24V。
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that described insulating power supply module
DC source is converted to 9V power supply supply optocoupler.
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that described level signal is 2V
Above.
Direct current the most according to claim 1 controlled transient response disconnecting switch, it is characterised in that the 3rd of described optocoupler draws
Load resistance is connect between the output ground wire pin of foot and insulating power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748374.0A CN106209046A (en) | 2016-08-26 | 2016-08-26 | A kind of direct current controlled transient response disconnecting switch |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610748374.0A CN106209046A (en) | 2016-08-26 | 2016-08-26 | A kind of direct current controlled transient response disconnecting switch |
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| CN106209046A true CN106209046A (en) | 2016-12-07 |
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| CN201610748374.0A Pending CN106209046A (en) | 2016-08-26 | 2016-08-26 | A kind of direct current controlled transient response disconnecting switch |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109038837A (en) * | 2018-07-20 | 2018-12-18 | 贝能电子（福建）有限公司 | Wireless charging device and wireless charging system |
| CN109665078A (en) * | 2019-02-11 | 2019-04-23 | 深圳鳍源科技有限公司 | Remote-controlled vehicle |
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| JP2001251850A (en) * | 2000-03-07 | 2001-09-14 | Toshiba Tec Corp | Self-excited power circuit provided with low input voltage preventing function |
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Application publication date: 20161207 |
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