CN208986911U - Control circuit - Google Patents
Control circuit Download PDFInfo
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- CN208986911U CN208986911U CN201822014328.5U CN201822014328U CN208986911U CN 208986911 U CN208986911 U CN 208986911U CN 201822014328 U CN201822014328 U CN 201822014328U CN 208986911 U CN208986911 U CN 208986911U
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- switching tube
- voltage
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- circuit
- load switch
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Abstract
Control circuit provided by the embodiment of the utility model, comprising: load switch, gate driving circuit and feed circuit；The first end of the load switch is connected with power input, and second end is connected with power output end, and control terminal is connected by the gate driving circuit with the output end of the feed circuit；The feed circuit input terminal is connected with the power output end；The gate driving circuit exports control voltage to the control terminal of the load switch according to the enable signal received；The load switch is according to control voltage output supply voltage corresponding with the control voltage；The feed circuit detects the rate of rise of the supply voltage, and when the rate of rise is more than preset threshold value, adjusts the control voltage of the gate driving circuit output.It using control circuit provided by the utility model, can provide the rate of climb gentle supply voltage for electronic component, electronic component is avoided to damage because supply voltage power-up speeds are too fast.
Description
Technical field
The utility model relates to electronic technology field, in particular to a kind of control circuit.
Background technique
With the development of Information technology, the demand of electronic equipment is increasing.Wherein, electronic component is as electronic circuit
In basic element, be realize the essential component part of electronic equipment required function.Electronic component can be individual envelope
Dress, for example, capacitor, inductor, transistor etc., are also possible to the group of different complexities, for example, integrated circuit.
In the prior art, when external power supply is that electronic component is powered, since the supply voltage power-up speeds of offer are too fast, from
And lead to the damage of electronic component.For example, as shown in Figure 1, voltage will occur if supply voltage rises rapidly since 0V
Overshoot and oscillation, although finally stabilizing to normal voltage, voltage overshoot when initial, so as to cause electronic component damage.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of control circuit, the control circuit can be electronics
Element provides the rate of climb gentle supply voltage, and electronic component is avoided to damage because supply voltage power-up speeds are too fast.
A kind of control circuit, comprising: load switch, gate driving circuit and feed circuit；
Wherein:
The first end of the load switch is connected with power input, and second end is connected with power output end, and control terminal is logical
The gate driving circuit is crossed to be connected with the output end of the feed circuit；
The feed circuit input terminal is connected with the power output end；
The gate driving circuit includes: buffer Buffer, switching tube P1, switching tube N1, switching tube P2 and switch
Pipe N2；
The input terminal of the buffer Buffer be enable signal input terminal, the first output end respectively with the switching tube P1
Control terminal be connected with the control terminal of the switching tube N1, second output terminal is connected with the power input, third output end
Ground connection；
The first end of the switching tube P1 is connected with the power input, second end respectively with the switching tube N1
Two ends, the control terminal of switching tube P2, the control terminal of switching tube N2 and the feed circuit output end be connected；
The first end of the switching tube N1 is grounded；
The first end of the switching tube P2 is connected with power input；The second end second end with the switching tube N2 respectively
It is connected with the control terminal of the load switch；
The first end of the switching tube N2 is grounded.
The feed circuit circuit includes: that the feed circuit circuit includes: switching tube N3, switching tube N4 and capacitor C；
The second end of the switching tube N4 is connected by the capacitor C with the power output end, control terminal respectively with its
Second end is connected with the control terminal of the switching tube N3, first end ground connection；
The second end of the switching tube N3 is connected with the second end of the switching tube P1, first end ground connection.
Compared with prior art, the utility model includes following advantages:
Control circuit provided by the embodiment of the utility model, comprising: load switch, gate driving circuit and feed circuit；
Wherein: the first end of the load switch is connected with power input, and second end is connected with power output end, and control terminal passes through institute
Gate driving circuit is stated to be connected with the output end of the feed circuit；The feed circuit input terminal and the power output end phase
Even；The gate driving circuit is used for, and exports control electricity to the control terminal of the load switch according to the enable signal received
Pressure；The load switch is used for, according to control voltage output supply voltage corresponding with the control voltage；The feedback
Circuit is used for, and the rate of rise of the supply voltage is detected, and when the rate of rise is more than preset threshold value, described in adjustment
The control voltage of gate driving circuit output.Using control circuit provided by the utility model, can be provided for electronic component
The gentle supply voltage of lifting speed avoids electronic component from damaging because supply voltage power-up speeds are too fast.
Detailed description of the invention
It, below will be to required in embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing to be used is briefly described, it should be apparent that, the accompanying drawings in the following description is only some realities of the utility model
Example is applied, it for those of ordinary skill in the art, without any creative labor, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is voltage overshoot schematic diagram in the prior art；
Fig. 2 is a kind of structural schematic diagram of control circuit provided by the utility model；
Fig. 3 is a kind of another structural schematic diagram of control circuit provided by the utility model；
Fig. 4 is a kind of control circuit simulated effect figure provided by the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
The utility model is a kind of control circuit, and the control circuit enough controls the rate of rise of power output end voltage,
There is provided the rate of climb gentle supply voltage for the electronic component of power supply rear class.
The specific implementation of the utility model is described below for control circuit structural representation.
With reference to Fig. 2, the schematic diagram of the utility model embodiment control circuit is shown, comprising:
Load switch 101, gate driving circuit 102 and feed circuit 103；
The first end of the load switch 101 is connected with power input VIN, second end and power output end VOUT phase
Even, control terminal is connected by gate driving circuit 102 with one end of the feed circuit；
103 other end of feed circuit is connected with the power output end VOUT；
The gate driving circuit 102 is used for, and the control terminal according to the enable signal to the load switch that receive is defeated
Voltage is controlled out；
The load switch 101 is used for, according to control voltage output supply voltage corresponding with the control voltage；
The feed circuit is used for, and detects the rate of rise of the supply voltage, and when the rate of rise is more than default
Threshold value when, adjust the control voltage of gate driving circuit output.
Control circuit provided by the embodiment of the utility model, it should be noted that the load switch 101 is PMOS switch
It manages, the first end in the load switch 101 is source electrode, and second end is drain electrode, and control terminal is grid.
Control circuit provided by the embodiment of the utility model, when the 101 control terminal voltage of load switch is high voltage,
The load switch belongs to off-state, and power output end does not have voltage output, and feed circuit can not detect on supply voltage
Slope is risen, feed circuit does not have feedback effect in control circuit at this time, belongs to off position.
Control circuit provided by the embodiment of the utility model, when 101 control terminal of load switch is low-voltage or centre
When voltage, the load switch 101 belongs on state, then the load switch 101 is produced according to the height of its control terminal voltage
Raw supply voltage corresponding with the control terminal voltage.The feed circuit 103 is able to detect that the rising of the supply voltage
Slope adjusts the control voltage that the gate driving circuit 102 exports, i.e., when the rate of rise is more than preset threshold value
Adjust the control terminal voltage of the load switch 101.When the 101 control terminal voltage of load switch is adjusted, correspondingly,
The voltage absolute value of the difference (hereinafter referred to as VGS value) of its grid and source electrode also changes.The VGS value is opened with the load
101 conduction impedances correlation is closed, VGS value is smaller, and 101 conduction impedance of load switch is bigger, and impedance is bigger, the supply voltage of output
The rate of rise is also just smaller.Therefore control circuit provided by the embodiment of the utility model is realized by the feedback effect of feed circuit
The purpose of the supply voltage rate of rise of control output.
Control circuit provided by the embodiment of the utility model, comprising: load switch 101, gate driving circuit 102 and feedback
Circuit 103；Wherein: the first end of the load switch is connected with power input, and second end is connected with power output end, control
End is connected by the gate driving circuit with the output end of the feed circuit；The feed circuit input terminal and the power supply
Output end is connected；The gate driving circuit is used for, and the control terminal according to the enable signal to the load switch that receive is defeated
Voltage is controlled out；The load switch is used for, according to control voltage output supply voltage corresponding with the control voltage；
The feed circuit is used for, and detects the rate of rise of the supply voltage, and when the rate of rise is more than preset threshold value,
Adjust the control voltage of the gate driving circuit output.It can be electronics member using control circuit provided by the utility model
Part provides the rate of climb gentle supply voltage, and electronic component is avoided to damage because supply voltage power-up speeds are too fast.
Control circuit provided by the embodiment of the utility model shows control provided by the embodiment of the utility model with reference to Fig. 3
The physical circuit figure of gate driving circuit in circuit processed, wherein the gate driving circuit includes: buffer Buffer, switch
Pipe P1, switching tube N1, switching tube P2 and switching tube N2；
The input terminal of the buffer Buffer be enable signal input terminal, the first output end respectively with the switching tube P1
Control terminal be connected with the control terminal of the switching tube N1, second output terminal is connected with the power input, third output end
Ground connection；
The first end of the switching tube P1 is connected with the power input, second end respectively with the switching tube N1
Two ends, the control terminal of switching tube P2, the control terminal of switching tube N2 and the feed circuit output end be connected；
The first end of the switching tube N1 is grounded；
The first end of the switching tube P2 is connected with power input；The second end second end with the switching tube N2 respectively
It is connected with the control terminal of the load switch；
The first end of the switching tube N2 is grounded.
Control circuit provided by the embodiment of the utility model, it should be noted that in each switching tube of each embodiment, institute
Stating first end is source electrode, and the second end is drain electrode, and the control terminal is grid.
Control circuit provided by the utility model, the switching tube P1 and the switching tube N1 form the first pole phase inverter,
The switching tube P2 and switching tube N2 forms the second pole phase inverter.The phase inverter is used for, and identifies input voltage, and reverse phase
Output.The output end of the feed circuit is connected between first pole phase inverter and second pole phase inverter.
Control circuit provided by the embodiment of the utility model, the switching tube P1 and the switching tube P2 are PMOS tube, institute
Stating the switching tube N1 and switching tube N2 is NMOS tube.
Control circuit provided by the utility model, when the buffer Buffer receives enable signal, described in identification
Enable signal, and the first reverse voltage of anti-phase output, the first pole phase inverter of the switching tube P1 and switching tube N1 composition
Receive and identify first reverse voltage, and the second reverse voltage of anti-phase output.
When the feed circuit belongs to off position, i.e., does not play feedback effect in control circuit, the switching tube
Second pole phase inverter of P2 and switching tube N2 composition directly receives and identifies second reverse voltage, and it is anti-to export third
Phase voltage, the third counter voltage are control voltage.
When the feed circuit detects that the power output end voltage rate of rise is more than preset threshold value, the feedback electricity
Road adjusts the voltage value of second reverse voltage by its output end, and the of the switching tube P2 and switching tube N2 composition
Two pole phase inverters receive and identify the second reverse voltage after overregulating voltage value, and export third reverse voltage, and described
Three counter voltages are control voltage.
Control circuit provided by the embodiment of the utility model shows the utility model embodiment control circuit with reference to Fig. 3
The physical circuit figure of middle feed circuit, wherein the feed circuit includes: switching tube N3, switching tube N4 and capacitor C；
The second end of the switching tube N4 is connected by the capacitor C with the power output end, control terminal respectively with its
Second end is connected with the control terminal of the switching tube N3, first end ground connection；
The second end of the switching tube N3 is connected with the second end of the switching tube P1, first end ground connection.
The control circuit that the utility model is implemented, it should be noted that the switching tube N3, the switching tube N4 are
NMOS tube.
The control circuit that the utility model is implemented, when the feed circuit detects that the power output end voltage rate of rise is super
When crossing preset threshold value, the capacitor C of the feed circuit makes the switching tube by coupling the switching tube N4 control terminal voltage
N4 control terminal voltage is coupled as high voltage, when the switching tube N4 control terminal voltage is high voltage, the switching tube N3's
Controlling voltage is also high voltage, so that the switching tube N3 be made to be switched on, the second end of the switching tube N3 is as the feedback
The output end of circuit, after switching tube N3 conducting, the switching tube N3 adjusts in the gate driving circuit the by its second end
The voltage value of second reverse voltage of one pole phase inverter output, is adjusted the voltage of load switch control terminal, the load
Switch exports supply voltage corresponding with the control voltage, to play the role of feedback according to the control voltage.
Control circuit provided by the embodiment of the utility model, it should be noted that the feed circuit belongs to the control
The internal circuit of circuit, the capacitance of capacitor C is smaller in the feed circuit, therefore the control circuit can single-chip integration.
The control circuit that the utility model is implemented, in order to carry out detailed retouch to control circuit provided by the utility model
It states, the practical application of the utility model is illustrated:
Control circuit provided by the embodiment of the utility model shows the utility model embodiment control circuit with reference to Fig. 3
Physical circuit figure.
Load switch is PMOS tube, and first end is source electrode, connects power input VIN, and second end is drain electrode, connection electricity
Source output terminal VOUT.
In gate driving circuit, enable signal EN is " 0 " still " 1 ", and anti-phase output to buffer Buffer for identification,
Wherein, described " 0 " represents low-voltage, and " 1 " represents high voltage.Switching tube P1 and switching tube N1 forms the first pole phase inverter,
Switching tube P2 and switching tube N2 forms the second pole phase inverter, and first pole phase inverter and second pole phase inverter are for identification
The voltage of input, and anti-phase output.Wherein the switching tube P1 and switching tube P2 is PMOS tube, the switching tube N1 and institute
Stating switching tube N2 is NMOS tube.
In feed circuit, switching tube N3 and switching tube N4 are NMOS tube.
The control circuit that the utility model is implemented, when the received enable signal of buffer Buffer is low-voltage " 0 ", institute
State buffer Buffer anti-phase output high voltage " 1 "；Described in first pole phase inverter of switching tube P1 and switching tube N1 composition receives
The high voltage " 1 " of buffer Buffer output, and anti-phase output low-voltage " 0 "；Switching tube P2 and switching tube N2 forms the second pole
Phase inverter receives the low-voltage " 0 " of first pole phase inverter output, and anti-phase output high voltage " 1 ".When described second extremely anti-
When phase device output HIGH voltage, the control terminal of the load switch is also high voltage, and the load switch can not be connected, i.e., power supply is defeated
Outlet does not have voltage output, and feed circuit can not detect the power output end voltage rate of rise, and feedback voltage belongs to not at this time
Working condition.
The control circuit that the utility model is implemented, when the received enable signal of buffer Buffer is high voltage " 1 ", institute
State buffer Buffer anti-phase output low-voltage " 0 "；Described in first pole phase inverter of switching tube P1 and switching tube N1 composition receives
The low-voltage " 0 " of buffer Buffer output, and anti-phase output high voltage " 1 "；The second of switching tube P2 and switching tube N2 composition
Pole phase inverter receives the high voltage " 1 " of first pole phase inverter output, and anti-phase output control voltage is the low-voltage of " 0 ".
When second pole phase inverter exports low-voltage, the control terminal of the load switch is also low-voltage, the load switch quilt
Conducting, the VGS of load switch is very big at this time, and the supply voltage rate of rise of output is very high, when the feed circuit detects electricity
When the rate of rise of source voltage is more than preset threshold value, the capacitor C in the feed circuit is by coupling the switching tube N4 control
End voltage processed makes the switching tube N4 control terminal voltage be coupled as high voltage, when the switching tube N4 control terminal voltage is height
When voltage, the control voltage of the switching tube N3 is also high voltage, so that the switching tube N3 be made to be switched on.
Output end of the second end of the switching tube N3 of the feed circuit as feed circuit, it is defeated with the first pole phase inverter
Outlet is connected with the input terminal of the second pole phase inverter, after the switching tube N3 conducting, to the output end of first pole phase inverter
There is voltage drop-down, the high voltage " 1 " for exporting first pole phase inverter becomes medium voltage, so as to cause the second pole
The control voltage of phase inverter output becomes medium voltage from low-voltage " 0 ".In the control voltage of the second pole phase inverter output is
Between voltage when, the control terminal of load switch M0 is also medium voltage, when the control terminal of the load switch M0 is also medium voltage
When, the case where control terminal relative to load switch is low-voltage, the VGS of the load switch be in a lesser value, negative
The VGS of load switch is smaller, and conduction impedance is bigger, and the supply voltage rate of rise of output is smaller, i.e., rate of voltage rise is gentler,
Realize the purpose of the control power output end voltage rate of rise.
After the supply voltage VOUT of output rises to the voltage value equal to input supply voltage VIN, keep stablizing, power supply
The output end voltage rate of rise is zero, and capacitor C does not have the coupling of AC signal, and switching tube N4 releases its control terminal voltage at this time
It finishes, switching tube N3 can not be connected, and the feedback effect of feed circuit leaves it at that, output of the switching tube N3 to the first pole phase inverter
Hold the effect of no voltage drop-down, phase inverter output in first pole rises high voltage " 1 " from medium voltage, corresponding the and pole
Phase inverter exports low-voltage " 0 ", and the VGS of load switch reaches maximum, and conduction impedance is smaller, hereafter, mentions for rear class electronic component
Voltage supplied is the burning voltage of supply voltage.
Control circuit provided by the embodiment of the utility model, in feed circuit, when capacitor C is bigger, switch tube N4
Coupling ability it is stronger, when the coupling ability of capacitor C switch tube N4 is stronger, switching tube N3's exports electricity to the first pole phase inverter
Pressure drawing effect is stronger, to keep the VGS of load switch smaller, VGS is smaller, and the conduction impedance of load switch is bigger, defeated
The supply voltage rate of rise out is also just smaller.So control circuit provided by the embodiment of the utility model, passes through feed circuit
Realize the rate of rise of control supply voltage.
Control circuit provided by the embodiment of the utility model shows the effect of the utility model embodiment with reference to Fig. 4
Figure, wherein the tr in figure indicates that supply voltage VOUT rises to the time required for VIN, using control provided by the utility model
The input supply voltage VIN that voltage rapidly rises can be exported and be risen gentle supply voltage VOUT for voltage by circuit processed.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.System and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of the utility model.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (1)
1. a kind of control circuit characterized by comprising
Load switch, gate driving circuit and feed circuit；
Wherein:
The first end of the load switch is connected with power input, and second end is connected with power output end, and control terminal passes through institute
Gate driving circuit is stated to be connected with the output end of the feed circuit；
The feed circuit input terminal is connected with the power output end；
The gate driving circuit includes: buffer Buffer, switching tube P1, switching tube N1, switching tube P2 and switching tube N2；
The input terminal of the buffer Buffer is enable signal input terminal, the control with the switching tube P1 respectively of the first output end
End processed is connected with the control terminal of the switching tube N1, and second output terminal is connected with the power input, third output end ground connection；
The first end of the switching tube P1 is connected with the power input, second end respectively with the switching tube N1 second
End, the control terminal of switching tube P2, the control terminal of switching tube N2 and the feed circuit output end be connected；
The first end of the switching tube N1 is grounded；
The first end of the switching tube P2 is connected with power input；Second end respectively with the second end of the switching tube N2 and institute
The control terminal for stating load switch is connected；
The first end of the switching tube N2 is grounded；
The feed circuit circuit includes: switching tube N3, switching tube N4 and capacitor C；
The second end of the switching tube N4 is connected by the capacitor C with the power output end, control terminal respectively with its second
End is connected with the control terminal of the switching tube N3, first end ground connection；
The second end of the switching tube N3 is connected with the second end of the switching tube P1, first end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014328.5U CN208986911U (en) | 2018-12-03 | 2018-12-03 | Control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822014328.5U CN208986911U (en) | 2018-12-03 | 2018-12-03 | Control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208986911U true CN208986911U (en) | 2019-06-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822014328.5U Active CN208986911U (en) | 2018-12-03 | 2018-12-03 | Control circuit |
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| CN (1) | CN208986911U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274362A (en) * | 2018-12-03 | 2019-01-25 | 上海艾为电子技术股份有限公司 | Control circuit |
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2018
- 2018-12-03 CN CN201822014328.5U patent/CN208986911U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109274362A (en) * | 2018-12-03 | 2019-01-25 | 上海艾为电子技术股份有限公司 | Control circuit |
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