CN109343410A - Adjust pipe control circuit and control method - Google Patents
Adjust pipe control circuit and control method Download PDFInfo
- Publication number
- CN109343410A CN109343410A CN201811292956.8A CN201811292956A CN109343410A CN 109343410 A CN109343410 A CN 109343410A CN 201811292956 A CN201811292956 A CN 201811292956A CN 109343410 A CN109343410 A CN 109343410A
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- Prior art keywords
- adjustment pipe
- circuit
- control circuit
- switching tube
- rate
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000003071 parasitic effect Effects 0.000 claims abstract description 10
- 239000003990 capacitor Substances 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 9
- 230000007423 decrease Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Electronic Switches (AREA)
Abstract
The present invention proposes a kind of adjustment pipe control circuit and control method, when the control circuit detects load short circuits, the gate source voltage of the adjustment pipe is pulled down with first rate in the first stage, the gate source voltage of the adjustment pipe is pulled down with the second rate in second stage, the first rate is greater than second rate.The present invention by control adjustment pipe so that switching circuitry output voltage will not decline it is too low, will not because in parasitic inductance current break due to vibrate it is too high.
Description
Technical field
The present invention relates to field of power electronics, in particular to a kind of adjustment pipe control circuit and control method.
Background technique
In the prior art, adjustment pipe control circuit includes adjustment pipe, and the adjustment pipe is connected to switching circuit and load
Between.When the load short circuits, the adjustment pipe cannot turn off in time, and load current can rise quickly, switching circuitry output
Voltage can decline it is too low, meanwhile, the adjustment is managed in hard turn off process, due to the presence of parasitic inductance in circuit, load current
Decline too fast, switching circuitry output voltage can also rise too high, may be damaged circuit arrangement, cause security risk.
Summary of the invention
It is of the existing technology for solving the object of the present invention is to provide a kind of adjustment pipe control circuit and control method
When load short circuits, the decline of switching circuitry output voltage is too low and rises too high problem.
To achieve the above object, the present invention provides a kind of adjustment pipe control circuit, the control circuit detects load
When short-circuit, the gate source voltage of the adjustment pipe is pulled down with first rate in the first stage, is pulled down in second stage with the second rate
The gate source voltage of the adjustment pipe, the first rate are greater than second rate.
Optionally, the control circuit includes first control circuit, and the first control circuit includes the first discharge circuit
With the second discharge circuit, the second discharge circuit output end connects the first discharge circuit control terminal；
When the first stage, the adjustment pipe parasitic capacitance is discharged by first discharge circuit, under the electric current for adjusting pipe
Drop to cut-off current；
When second stage, the adjustment pipe parasitic capacitance is discharged by second discharge circuit.
Optionally, first discharge circuit includes first switch tube, first switch tube control terminal connection described the
Two discharge circuit output ends, the first switch tube first end connect the adjustment pipe control terminal, the first switch tube second
The common end of end connection the adjustment pipe and load, according to the limit of first switch tube and the dimension scale setting adjustment pipe of adjustment pipe
Flow valuve.
Optionally, first discharge circuit includes second switch and third switching tube, the second switch first
End connects the adjustment pipe control terminal with control terminal, and the second switch second end connects the third switching tube first end,
Third switch controlled end connects the second discharge circuit output end, and the third switching tube second end connects the tune
The common end of homogeneous tube and load, according to the cut-off current of second switch and the dimension scale setting adjustment pipe of adjustment pipe.
Optionally, second discharge circuit includes first resistor, second resistance, the first current source, the 4th switch and the
Five switches, first current source export the first electric current and flow through first resistor, and the first resistor first end connects the adjustment
Pipe control terminal, the first resistor second end are grounded by the 4th switching tube；The 5th switching tube first end connects institute
Adjustment pipe control terminal is stated, the 5th switching tube second end connects the second resistance first end, the 5th switch controlled
End connects the first resistor second end, the common end of the connection of second resistance second end the adjustment pipe and load；Described 5th
Switching tube and the second resistance common end are as the second discharge circuit output end.
Optionally, the first control circuit further includes booster circuit, when loading normal, the output of the booster circuit
Voltage is as the adjustment pipe control terminal voltage；When load short circuits, the booster circuit output voltage is pulled low, the adjustment
Pipe conduction impedance becomes larger.
Optionally, the control circuit further includes second control circuit, and the second control circuit includes clamp circuit,
One capacitor, the first current source and the 6th switching tube, the first capacitor first end receive load voltage, the first capacitor second
End connection clamper circuit output end；First current source connects the 6th switching tube first end, the 4th switching tube the
Two ends ground connection, the 6th switch controlled end connect the first capacitor second end, the 6th switch first end voltage control
Make the 4th switching tube on-off.
The present invention also proposes a kind of adjustment pipe control method, when load short circuits, pulls down institute in the first stage with first rate
The gate source voltage for stating adjustment pipe pulls down the gate source voltage of the adjustment pipe, the first rate in second stage with the second rate
Greater than second rate.
Compared with prior art, the invention has the following advantages that being pulled down in the first stage with first rate when load short circuits
The gate source voltage of the adjustment pipe pulls down the gate source voltage of the adjustment pipe, first speed in second stage with the second rate
Rate is greater than second rate.When load short circuits, switching circuitry output voltage will not decline too low the present invention, will not rise
Too high, short-circuit respective rate is fast, while load current will not decline too fast, the very big security risk for reducing circuit arrangement.
Detailed description of the invention
Fig. 1 is that circuit diagram processed is managed in present invention adjustment；
Fig. 2 is the first first control circuit schematic diagram of the invention；
Fig. 3 is second of first control circuit schematic diagram of the invention；
Fig. 4 is second control circuit schematic diagram of the present invention；
Fig. 5 is present invention adjustment pipe gate source voltage waveform；
Specific embodiment
The preferred embodiment of the present invention is described in detail below in conjunction with attached drawing, but the present invention is not restricted to these
Embodiment.The present invention covers any substitution made in the spirit and scope of the present invention, modification, equivalent method and scheme.
In order to make the public have thorough understanding to the present invention, it is described in detail in the following preferred embodiment of the present invention specific
Details, and the present invention can also be understood completely in description without these details for a person skilled in the art.
The present invention is more specifically described by way of example referring to attached drawing in the following passage.It should be noted that attached drawing is adopted
With more simplified form and using non-accurate ratio, to convenient, the lucidly aid illustration embodiment of the present invention the mesh
's.
Fig. 1 illustrates present invention adjustment pipe control circuit and control method, including adjustment pipe M01 and first control circuit
U01,00 output end of adjustment pipe M01 first end connection switch circuit U, second end connection load, the first control circuit
The connection load of U01 input terminal, exports first control signal V1, load voltage is output voltage Vout.The second control electricity
Road U02 receives first control signal V1 and output voltage Vout, and output end connects the adjustment pipe M01 control terminal.The present invention is logical
First control circuit U01 and second control circuit U02 control adjustment pipe M01 is crossed, so that when load short circuits, switching circuit output
End voltage VD will not decline too low, will not rise too high, load current Iout will not decline too fast, very big reduction circuit arrangement
Security risk.It should be noted that transistor, switching tube and power tube etc. belong to the model of adjustment pipe of the present invention
It encloses.
Fig. 2 illustrates the first first control circuit schematic diagram of the invention, including booster circuit U301, the first discharge circuit
With the second discharge circuit, first discharge circuit includes first switch tube M1, and second discharge circuit includes first resistor
R1, second resistance R2, the 4th switching tube M4, the 5th switching tube M5 and the first current source I1, the booster circuit U301 output end
Connecting the adjustment pipe M01 control terminal, the first resistor R1 first end connects the adjustment pipe M01 control terminal, and described first
Current source I1 first end connects the first resistor second end, and the first current source I1 second end connects the 4th switching tube
M4 first end, the 4th switching tube M4 second end ground connection.The 5th switching tube M5 first end connects the adjustment pipe M01 control
End processed, second end connect the second resistance R2 first end, and control terminal connects the first resistor R1 second end, and described the
Two resistance second ends receive output voltage Vout.The first switch tube M1 control terminal connects the second resistance R2 and described the
The common end of five switching tube M5, the first switch tube M1 first end connect the adjustment pipe M01 control terminal, and second end receives
Load voltage Vout.When load is not short-circuit, booster circuit U301 output voltage is adjustment pipe M01 control terminal voltage, works as load
When short-circuit, the 4th switching tube M4 conducting, the 5th switching tube PMOS tube M5 is pulled down, the 5th switching tube M5 conducting, first switch tube
M1 is pulled up, and first switch tube M1 conducting, the output voltage of booster circuit U301 is pulled down, and adjustment pipe M01 is pulled down, and impedance increases
Greatly.When load short circuits, first control circuit pulls down the gate source voltage of the adjustment pipe M01 first in the first stage with first rate,
The parasitic capacitance of adjustment pipe M01 mainly passes through the first discharge circuit i.e. first switch tube M1 electric discharge；First control circuit is with first
Rate pull down it is described adjustment pipe M01 gate source voltage after, then second stage with the second rate pull down it is described adjustment pipe M01 grid
Source voltage, at this point, the parasitic capacitance of adjustment pipe M01 mainly passes through the electric discharge of the second discharge circuit.
Fig. 3 illustrates second of first control circuit schematic diagram of the invention, and the difference with Fig. 2 is only that the first electric discharge electricity
Road, first discharge circuit include second switch M2 and third switching tube M3, the second switch M2 first end and control
End connects the adjustment pipe M01 control terminal, and the second switch M2 second end connects the third switching tube M3 first end, institute
It states third switch controlled end and connects the second discharge circuit output end, the third switching tube M3 second end receives load electricity
Press Vout.When load short circuits, first control circuit pulls down the grid source electricity of the adjustment pipe M01 in the first stage first with first rate
Pressure, the parasitic capacitance of adjustment pipe M01 mainly pass through second switch M2 and third switching tube M3 electric discharge.
Fig. 4 illustrates second control circuit schematic diagram of the present invention, including clamp circuit U401, first capacitor C1, the 6th opens
Pipe M6, the first current source I1 and two phase inverters are closed, clamp circuit U401 output end connects first capacitor C1 first end, the first electricity
Hold C1 second end and receive load voltage Vout, the 6th switching tube M1 control terminal connects the first capacitor C1 first end, institute
It states the 6th switching tube M6 first end and connects the first current source I1 output end, the 6th switching tube M6 second end ground connection.Described
Two phase inverters form series circuit, and input terminal connects the 6th switching tube M6 first end, the first control of output end output
Signal processed.When beginning, first capacitor C1 first end voltage is clamped at some current potential, when load short circuits, load voltage Vout
It reducing, first capacitor C1 first end voltage decreases, and the 6th switching tube M6 is pulled down, and the impedance of the 6th switching tube M6 increases,
6th switching tube M6 first end voltage increases, and after two phase inverters, obtains the first control signal V1 of high level, the first control
Control signal of the signal V1 as the 4th switching tube M4.
Fig. 5 illustrates present invention adjustment pipe gate source voltage output waveform, when control circuit detects load short circuits, adjustment pipe
Gate source voltage VGS is first pulled down in the first stage with first rate, is then pulled down in second stage with the second rate, the first speed
Rate is much larger than the second rate, and adjustment pipe gate source voltage is pulled down rate and is transitioned into the second rate naturally from first rate.First rank
Duan Shi, for adjustment pipe parasitic capacitance by the electric discharge of the first discharge circuit, the current automatic adaptation for adjusting pipe drops to cut-off current, i.e., the
The separation in one stage and second stage, the electric current for flowing through adjustment pipe is the cut-off current.For the first first control of the present invention
Circuit processed, the cut-off current for adjusting pipe can be arranged according to the dimension scale of adjustment pipe and first switch tube；For the present invention second
Kind first control circuit, the cut-off current for adjusting pipe can be arranged according to the dimension scale of adjustment pipe and second switch.The present invention
The determination and control of cut-off current do not need manual intervention, do not need circuit control yet, and the device property based on this circuit structure is certainly
It is dynamic to determine.
Although embodiment is separately illustrated and is illustrated above, it is related to the common technology in part, in ordinary skill
Personnel apparently, can be replaced and integrate between the embodiments, be related to one of embodiment and the content recorded is not known, then
It can refer to another embodiment on the books.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (8)
1. a kind of adjustment pipe control circuit, it is characterised in that: when the control circuit detects load short circuits, in the first stage with
First rate pulls down the gate source voltage of the adjustment pipe, pulls down the grid source electricity of the adjustment pipe with the second rate in second stage
Pressure, the first rate are greater than second rate.
2. adjustment pipe control circuit according to claim 1, it is characterised in that: the control circuit includes the first control electricity
Road, the first control circuit include the first discharge circuit and the second discharge circuit, the second discharge circuit output end connection
The first discharge circuit control terminal；
When the first stage, the adjustment pipe parasitic capacitance is discharged by first discharge circuit, and the electric current for adjusting pipe drops to
Cut-off current；
When second stage, the adjustment pipe parasitic capacitance is discharged by second discharge circuit.
3. adjustment pipe control circuit according to claim 2, it is characterised in that: first discharge circuit is opened including first
Guan Guan, the first switch tube control terminal connect the second discharge circuit output end, the first switch tube first end connection
The adjustment pipe control terminal, the first switch tube second end connect the common end of the adjustment pipe and load, open according to first
Close the cut-off current of the dimension scale setting adjustment pipe of pipe and adjustment pipe.
4. adjustment pipe control circuit according to claim 2, it is characterised in that: first discharge circuit is opened including second
Pipe and third switching tube are closed, the second switch first end connects the adjustment pipe control terminal with control terminal, and described second opens
It closes pipe second end and connects the third switching tube first end, it is defeated that third switch controlled end connects second discharge circuit
Outlet, the third switching tube second end connect the common end of the adjustment pipe and load, are managed according to second switch and adjustment
Dimension scale setting adjustment pipe cut-off current.
5. adjustment pipe control circuit according to claim 2, it is characterised in that: second discharge circuit includes the first electricity
Resistance, second resistance, the first current source, the 4th switch and the 5th switch, first current source export the first electric current and flow through first
Resistance, the first resistor first end connect the adjustment pipe control terminal, and the first resistor second end is opened by the described 4th
Close pipe ground connection；The 5th switching tube first end connects the adjustment pipe control terminal, and the 5th switching tube second end connects institute
Second resistance first end is stated, the 5th switch controlled end connects the first resistor second end, the second resistance second
The common end of end connection adjustment pipe and load；5th switching tube and the second resistance common end are as second electric discharge
Circuit output end.
6. according to claim 1, adjustment pipe control circuit described in 2,3,4 or 5, it is characterised in that: the first control circuit
It further include booster circuit, when loading normal, the output voltage of the booster circuit is as the adjustment pipe control terminal voltage；When
When load short circuits, the booster circuit output voltage is pulled low, and the adjustment pipe conduction impedance becomes larger.
7. adjustment pipe control circuit according to claim 5, it is characterised in that: the control circuit further includes the second control
Circuit, the second control circuit include clamp circuit, first capacitor, the first current source and the 6th switching tube, first electricity
Hold first end and receive load voltage, the first capacitor second end connects clamper circuit output end；The first current source connection
The 6th switching tube first end, the 6th switching tube second end ground connection, the 6th switch controlled end connection described the
One capacitor second end, the 6th switch first end voltage control the 4th switching tube on-off.
8. a kind of adjustment pipe control method, for controlling adjustment pipe, it is characterised in that: when load short circuits, in the first stage with the
One rate pulls down the gate source voltage of the adjustment pipe, pulls down the gate source voltage of the adjustment pipe with the second rate in second stage,
The first rate is greater than second rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292956.8A CN109343410B (en) | 2018-11-01 | 2018-11-01 | Control circuit and control method for adjusting tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811292956.8A CN109343410B (en) | 2018-11-01 | 2018-11-01 | Control circuit and control method for adjusting tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109343410A true CN109343410A (en) | 2019-02-15 |
| CN109343410B CN109343410B (en) | 2023-11-24 |
Family
ID=65313033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811292956.8A Active CN109343410B (en) | 2018-11-01 | 2018-11-01 | Control circuit and control method for adjusting tube |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109343410B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113093853A (en) * | 2021-04-15 | 2021-07-09 | 东北大学 | LDO circuit for realizing low input/output voltage difference in low-voltage starting process |
| CN118425602A (en) * | 2024-06-28 | 2024-08-02 | 杰华特微电子股份有限公司 | Current sampling circuit and switching power supply system using same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2559291A1 (en) * | 2005-09-08 | 2007-03-08 | Progressive Dynamics, Inc. | Power converter |
| US20070247126A1 (en) * | 2006-04-25 | 2007-10-25 | Ming Xu | Hybrid filter for high slew rate output current application |
| JP2008109747A (en) * | 2006-10-24 | 2008-05-08 | Fuji Electric Device Technology Co Ltd | Soft start circuit |
| CN102315632A (en) * | 2011-10-14 | 2012-01-11 | 广东易事特电源股份有限公司 | Driving circuit for inhibiting over current of IGBT (Insulated Gate Bipolar Transistor) |
| US20120068740A1 (en) * | 2010-09-17 | 2012-03-22 | Kabushiki Kaisha Toshiba | Voltage output circut |
| CN102694531A (en) * | 2011-03-24 | 2012-09-26 | 株式会社电装 | Load drive apparatus and semiconductor switching device drive apparatus |
| CN106385734A (en) * | 2016-10-26 | 2017-02-08 | 杰华特微电子（杭州）有限公司 | Voltage sampling circuit |
| CN209118099U (en) * | 2018-11-01 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | Adjust pipe control circuit |
-
2018
- 2018-11-01 CN CN201811292956.8A patent/CN109343410B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2559291A1 (en) * | 2005-09-08 | 2007-03-08 | Progressive Dynamics, Inc. | Power converter |
| US20070247126A1 (en) * | 2006-04-25 | 2007-10-25 | Ming Xu | Hybrid filter for high slew rate output current application |
| JP2008109747A (en) * | 2006-10-24 | 2008-05-08 | Fuji Electric Device Technology Co Ltd | Soft start circuit |
| US20120068740A1 (en) * | 2010-09-17 | 2012-03-22 | Kabushiki Kaisha Toshiba | Voltage output circut |
| CN102694531A (en) * | 2011-03-24 | 2012-09-26 | 株式会社电装 | Load drive apparatus and semiconductor switching device drive apparatus |
| CN102315632A (en) * | 2011-10-14 | 2012-01-11 | 广东易事特电源股份有限公司 | Driving circuit for inhibiting over current of IGBT (Insulated Gate Bipolar Transistor) |
| CN106385734A (en) * | 2016-10-26 | 2017-02-08 | 杰华特微电子（杭州）有限公司 | Voltage sampling circuit |
| CN209118099U (en) * | 2018-11-01 | 2019-07-16 | 杰华特微电子（杭州）有限公司 | Adjust pipe control circuit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113093853A (en) * | 2021-04-15 | 2021-07-09 | 东北大学 | LDO circuit for realizing low input/output voltage difference in low-voltage starting process |
| CN113093853B (en) * | 2021-04-15 | 2022-08-23 | 东北大学 | Improved LDO circuit for realizing low input/output voltage difference in low-voltage starting process |
| CN118425602A (en) * | 2024-06-28 | 2024-08-02 | 杰华特微电子股份有限公司 | Current sampling circuit and switching power supply system using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109343410B (en) | 2023-11-24 |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |
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