CN108153368A - Closed loop feedback regulator circuit - Google Patents
Closed loop feedback regulator circuit Download PDFInfo
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- CN108153368A CN108153368A CN201711174251.1A CN201711174251A CN108153368A CN 108153368 A CN108153368 A CN 108153368A CN 201711174251 A CN201711174251 A CN 201711174251A CN 108153368 A CN108153368 A CN 108153368A
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- Prior art keywords
- voltage
- closed loop
- loop feedback
- electric current
- triode
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/575—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices characterised by the feedback circuit
Abstract
This application discloses a kind of closed loop feedback regulator circuits.The closed loop feedback regulator circuit includes：Bleeder circuit, divides for the voltage to regulator block input terminal, obtains branch pressure voltage, and branch pressure voltage is input to comparison circuit；Comparison circuit is connect with bleeder circuit, for being compared according to branch pressure voltage and predeterminated voltage, adjusts the input terminal electric current for flowing through isolation linear optical coupling based on comparative result；Triode, the base stage of triode and the output terminal of linear optical coupling connect, and the electric current and pole that the collector of current control triode for being exported according to linear optical coupling exports penetrate voltage, to adjust the voltage of regulator block input terminal, it are made to stablize in optimum voltage value.By the application, solves the problem of regulator block backend load aggravates in voltage close loop circuit, and front voltage ripple is excessive in the relevant technologies.
Description
Technical field
This application involves voltage close loop circuit field, in particular to a kind of closed loop feedback regulator circuit.
Background technology
At present, in regulator block input terminal voltage closed loop circuit, the ripple of input terminal voltage value can influence regulator block rear end
Can power supply stablize output, and then influence the stability of electric supply system.As shown in Figure 1, regulator block output terminal Uo connect it is negative
When carrying exacerbation, the increasing of load current can cause regulator block front end electric current accordingly to increase, and resistance R partial pressures can increase therewith, then surely
Briquetting input voltage Ui can reduce, and the fluctuation of load is bigger, and Ui ripples can be bigger.If Ui is dropped within (Uoq+q) V, (wherein, Uoq
For the desired output of regulator block, such as 7805 Uoq is 5V, and q is the input of regulator block and output minimal difference), then voltage stabilizing
Block can have the risk that can not stablize output Uoq.
It is aggravated for regulator block backend load in voltage close loop circuit in the relevant technologies, front voltage ripple is excessive to ask
Topic, currently no effective solution has been proposed.
Invention content
The main purpose of the application is to provide a kind of closed loop feedback regulator circuit, to solve voltage close loop in the relevant technologies
The problem of regulator block backend load aggravates in circuit, and front voltage ripple is excessive.
To achieve these goals, according to this application provides a kind of closed loop feedback regulator circuits.The closed loop feedback voltage stabilizing
Circuit includes：Bleeder circuit divides for the voltage to regulator block input terminal, obtains branch pressure voltage, and branch pressure voltage is defeated
Enter to comparison circuit；Comparison circuit is connect with bleeder circuit, for being compared according to branch pressure voltage and predeterminated voltage, is based on
Comparison result adjusting flows through the input terminal electric current of isolation linear optical coupling；Triode, the base stage of triode and the output of linear optical coupling
End connection, between being penetrated for the electric current that exports of collector of triode described in the current control that export according to the linear optical coupling and pole
Voltage, to adjust the voltage of the regulator block input terminal.
Further, bleeder circuit includes：First divider resistance, one end are connect with regulator block input terminal, the other end and
Two divider resistances connect；The input terminal connection of second divider resistance, one end and comparison circuit, other end ground connection.
Further, comparison circuit includes：Source of stable pressure, for exporting predeterminated voltage, by predeterminated voltage and branch pressure voltage into
Row compares, and controls output current based on comparative result.
Further, source of stable pressure further includes：Judging unit, for judging whether branch pressure voltage is more than predeterminated voltage；Control
Unit, in the case of being more than predeterminated voltage in branch pressure voltage, control the first electric current of output, wherein, the first electric current is used to control
The electric current of the collector output of triode processed.
Further, control unit is additionally operable in the case where branch pressure voltage is less than predeterminated voltage, the second electricity of control output
Stream, wherein, the second electric current is less than the first electric current.
Further, source of stable pressure TL431.
Further, linear optical coupling is additionally operable to output transistor in the current control linear optical coupling exported according to comparison result
Electric current, wherein, the electric current of output transistor is transmitted to the base stage of triode in linear optical coupling.
Further, closed loop feedback regulator circuit further includes：The output terminal connection of base resistance, one end and linear optical coupling,
The base stage of the other end and triode connects, for base current to be configured.
Further, closed loop feedback regulator circuit further includes：Collector resistance connect with the collector of triode, is used for
It is divided.
Further, closed loop feedback regulator circuit further includes：A parallel resistance is penetrated in pole, and one end is connect with collector resistance,
The emitter of the other end and triode connects, for being shunted.
By the closed loop feedback regulator circuit of the application, the voltage of regulator block input terminal is divided by bleeder circuit
Pressure, obtains branch pressure voltage, branch pressure voltage is input to comparison circuit；Comparison circuit is connect with bleeder circuit according to branch pressure voltage
It is compared with predeterminated voltage, adjusts the input terminal electric current for flowing through isolation linear optical coupling based on comparative result；Triode, triode
Base stage and the output terminal of linear optical coupling connect, the collector of triode connect root with regulator block input terminal according to the linear light
Voltage is penetrated in the electric current of the collector output of triode described in the current control of coupling output and pole, is inputted with adjusting the regulator block
The voltage at end makes it stablize in optimum voltage value, solves in the relevant technologies that regulator block backend load adds in voltage close loop circuit
The problem of weight, front voltage ripple is excessive.It is exported by the collector of current control triode exported according to linear optical coupling
The voltage of current regulation regulator block input terminal so as to control the ripple of front voltage, and then has reached the steady of enhancing power work
Qualitatively effect.
Description of the drawings
The attached drawing for forming the part of the application is used for providing further understanding of the present application, the schematic reality of the application
Example and its explanation are applied for explaining the application, does not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 is the schematic diagram of the principle of regulator block input terminal divider resistance in the relevant technologies；
Fig. 2 is the schematic diagram according to closed loop feedback regulator circuit provided by the embodiments of the present application；
Fig. 3 is the schematic diagram according to optional closed loop feedback regulator circuit provided by the embodiments of the present application；
Fig. 4 is the flow relational graph according to electric current in closed loop feedback regulator circuit provided by the embodiments of the present application；And
Fig. 5 is the flow relational graph according to electric current in optional closed loop feedback regulator circuit provided by the embodiments of the present application.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the application can phase
Mutually combination.The application is described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
In order to which those skilled in the art is made to more fully understand application scheme, below in conjunction in the embodiment of the present application
The technical solution in the embodiment of the present application is clearly and completely described in attached drawing, it is clear that described embodiment is only
The embodiment of the application part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's all other embodiments obtained without making creative work should all belong to the model of the application protection
It encloses.
It should be noted that term " first " in the description and claims of this application and above-mentioned attached drawing, "
Two " etc. be the object for distinguishing similar, and specific sequence or precedence are described without being used for.It should be appreciated that it uses in this way
Data can be interchanged in the appropriate case, so as to embodiments herein described herein.In addition, term " comprising " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing series of steps or unit
Process, method, system, product or equipment are not necessarily limited to those steps or unit clearly listed, but may include without clear
It is listing to Chu or for the intrinsic other steps of these processes, method, product or equipment or unit.
According to an embodiment of the present application, a kind of closed loop feedback regulator circuit is provided.
Fig. 2 is the schematic diagram according to the closed loop feedback regulator circuit of the embodiment of the present application.As shown in Fig. 2, the closed loop feedback
Regulator circuit includes：
Bleeder circuit divides for the voltage to regulator block input terminal, obtains branch pressure voltage, branch pressure voltage is inputted
To comparison circuit.
Comparison circuit is connect with bleeder circuit, for being compared according to branch pressure voltage and predeterminated voltage, is tied based on comparing
Fruit adjusts the input terminal electric current for flowing through isolation linear optical coupling.
Triode, the base stage of triode and the output terminal of linear optical coupling connect, and are exported for root according to the linear optical coupling
Current control described in triode collector output electric current and pole penetrate voltage, to adjust the electricity of the regulator block input terminal
Pressure.
Closed loop feedback regulator circuit provided by the embodiments of the present application, by bleeder circuit to the voltage of regulator block input terminal into
Row partial pressure, obtains branch pressure voltage, branch pressure voltage is input to comparison circuit；Comparison circuit is connect with bleeder circuit according to partial pressure
Voltage is compared with predeterminated voltage, adjusts the input terminal electric current for flowing through isolation linear optical coupling based on comparative result；Triode, three
The base stage of pole pipe and the output terminal of linear optical coupling connect, and the collector of triode is connect with regulator block input terminal according to linear optical coupling
Output state controls the base current of triode, to adjust the pole radio pressure of triode Linear Amplifer state and collector current,
It is made to stablize in optimum voltage value, solves regulator block backend load exacerbation in voltage close loop circuit in the relevant technologies, front end electricity
Emboss the problem of wave is excessive.The current regulation exported by the collector of current control triode exported according to linear optical coupling is steady
The voltage of briquetting input terminal so as to control the ripple of front voltage, and then has achieved the effect that enhance the stability of power work.
Optionally, bleeder circuit includes：First divider resistance, one end are connect with regulator block input terminal, the other end and second
Divider resistance connects；The input terminal connection of second divider resistance, one end and comparison circuit, other end ground connection.
As shown in figure 3, R3 corresponds to the first above-mentioned divider resistance, R4 corresponds to the second above-mentioned divider resistance.
Optionally, comparison circuit includes：For exporting predeterminated voltage, predeterminated voltage and branch pressure voltage are carried out for source of stable pressure
Compare, control output current based on comparative result.
As shown in figure 3, U2 corresponds to above-mentioned source of stable pressure.
Optionally, source of stable pressure further includes：Judging unit, for judging whether branch pressure voltage is more than predeterminated voltage；Control is single
Member, in the case of being more than predeterminated voltage in branch pressure voltage, control the first electric current of output, wherein, the first electric current is used to control
The electric current of the collector output of triode.
Optionally, control unit is additionally operable in the case where branch pressure voltage is less than predeterminated voltage, control the second electric current of output,
Wherein, the second electric current is less than the first electric current.
Optionally, source of stable pressure TL431.
Optionally, linear optical coupling is additionally operable to output transistor in the current control linear optical coupling exported according to comparison result
Electric current, wherein, the electric current of output transistor is transmitted to the base stage of triode in linear optical coupling.
For example, as shown in figure 3, the electric current of output transistor increases in linear optical coupling, the raising of B points above earth potential increases indirectly
Add base current.
Optionally, closed loop feedback regulator circuit further includes：The output terminal connection of base resistance, one end and linear optical coupling, separately
The base stage of one end and triode connects, for base current to be configured.
As shown in figure 3, R10Corresponding above-mentioned base resistance.
Optionally, closed loop feedback regulator circuit further includes：Collector resistance is connect with the collector of triode, for into
Row partial pressure.
As shown in figure 3, R8Corresponding above-mentioned collector resistance.
Optionally, closed loop feedback regulator circuit further includes：A parallel resistance is penetrated in pole, and one end is connect with collector resistance, separately
The emitter of one end and triode connects, for being shunted.
As shown in figure 3, R9A parallel resistance is penetrated in corresponding above-mentioned pole.
Fig. 3 is according to the schematic diagram of optional closed loop feedback regulator circuit provided by the embodiments of the present application, regulator block input
Terminal voltage is Ui, and output end voltage Uo, Uo connect workload, if Uo backend loads aggravate, load current can increase, voltage stabilizing
Block front end electric current can accordingly increase, and electric resistance partial pressure can increase therewith, then Ui (Ui=Us-UR) can reduce, and US fixes direct current for one
Voltage.If Ui drop to (Uoq+q) V (corresponding above-mentioned predeterminated voltage, wherein, Uoq is the desired output of regulator block, and q is voltage stabilizing
The input of block and output minimal difference) within, then the Uo outputs of rear end will have the risk substantially fallen.
Specifically, as shown in figure 3, setting (Uoq+p) V, (wherein, Uoq is the desired output of regulator block, for example, 7805
Uoq is 5V, and p is the optimization difference of regulator block input and output) be the input voltage stabilizing value set, the divider resistance R3 of feedback control loop
Meet formula (Uoq+p) * [R3/ (R3+R4)]=2.5V with R4.
(1) if the voltage Ub=2.5V that regulator block input terminal voltage Ui=(Uoq+p) V, R4 divide, the hair of linear optical coupling
Optical diode no current, then the output of linear optical coupling output transistor no current, closed loop feedback network do not work.
(2) if regulator block input terminal voltage Ui>(Uoq+p) V (the corresponding above-mentioned feelings for being more than predeterminated voltage in branch pressure voltage
Under condition), the light emitting diode of linear optical coupling can be connected because of forward voltage drop.With the increase of Ui, diode in linear optical coupling is flowed through
Electric current it is bigger, the electric current iF of the output transistor of linear optical coupling increases therewith, base resistance R10 points of triode Q1
Voltage accordingly increases, then the base current iB of Q1 increases.Therefore, it is operated in the linear voltage drop V of the Q1 of linear zoneCE, collector
Electric current ic accordingly increases, according to Ui=Us-[(R8*ic)+VCE], regulator block input terminal voltage Ui can reduce, that is, complete closed loop and bear
Feedback regulation control, makes Ui tend to (Uoq+p) V, and flow relational graph is as shown in Figure 4.
(3) regulator block output terminal Uo backend loads aggravate, and load current increasing can form Ui downward trends.Regulator block is defeated
Enter terminal voltage Ui<(Uoq+p) (corresponding above-mentioned in the case where branch pressure voltage is less than predeterminated voltage), the hair of linear optical coupling during V
Optical diode can also be connected because of forward voltage drop.With the reduction of Ui, the electric current iF for flowing through diode in linear optical coupling can reduce,
The electric current of the output transistor of linear optical coupling declines therewith, and the voltage that the base resistance R10 of triode Q1 divides accordingly reduces, then
The base current iB of Q1 reduces.Therefore, it is operated in the linear voltage drop V of the Q1 of linear zoneCE, collector current ic accordingly reduce,
According to Ui=Us-[(R8*ic)+VCE], regulator block input terminal voltage Ui can increase, and can complete close loop negative feedback adjusting control, make
Ui tends to (Uoq+p) V, and flow relational graph is as shown in Figure 5.
It should be understood by those skilled in the art that, embodiments herein can be provided as system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or the embodiment in terms of combining software and hardware can be used in the application
Form.It is deposited moreover, the application can be used to can be used in one or more computers for wherein including computer usable program code
The shape of computer program product that storage media is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The application be with reference to the flow chart according to the embodiment of the present application equipment (system) and computer program product and/or
Block diagram describes.It should be understood that each flow that can be realized by computer program instructions in flowchart and/or the block diagram and/or
The combination of flow and/or box in box and flowchart and/or the block diagram.These computer program instructions can be provided to arrive
All-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices processor to generate one
Machine so that the instruction generation performed by computer or the processor of other programmable data processing devices, which is used to implement, is flowing
The device of function specified in one flow of journey figure or multiple flows and/or one box of block diagram or multiple boxes.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction generation being stored in the computer-readable memory includes referring to
Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or
The function of being specified in multiple boxes.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps are performed on calculation machine or other programmable devices to generate computer implemented processing, so as in computer or
The instruction offer performed on other programmable devices is used to implement in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, computing device includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include computer-readable medium in volatile memory, random access memory (RAM) and/
Or the forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable Jie
The example of matter.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer-readable instruction, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase transition internal memory (PRAM), static RAM (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), fast flash memory bank or other memory techniques, CD-ROM read-only memory (CD-ROM),
Digital versatile disc (DVD) or other optical storages, magnetic tape cassette, the storage of tape magnetic rigid disk or other magnetic storage apparatus
Or any other non-transmission medium, available for storing the information that can be accessed by a computing device.It defines, calculates according to herein
Machine readable medium does not include temporary computer readable media (transitory media), such as data-signal and carrier wave of modulation.
It should also be noted that, term " comprising ", "comprising" or its any other variant are intended to nonexcludability
Comprising so that process, method, commodity or equipment including a series of elements are not only including those elements, but also wrap
Include other elements that are not explicitly listed or further include for this process, method, commodity or equipment it is intrinsic will
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including element
Also there are other identical elements in process, method, commodity or equipment.
It will be understood by those skilled in the art that embodiments herein can be provided as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or the embodiment in terms of combining software and hardware can be used in the application
Form.It is deposited moreover, the application can be used to can be used in one or more computers for wherein including computer usable program code
The shape of computer program product that storage media is implemented on (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
It these are only embodiments herein, be not limited to the application.To those skilled in the art,
The application can have various modifications and variations.All any modifications made within spirit herein and principle, equivalent replacement,
Improve etc., it should be included within the scope of claims hereof.
Claims (10)
1. a kind of closed loop feedback regulator circuit, which is characterized in that including：
Bleeder circuit divides for the voltage to regulator block input terminal, obtains branch pressure voltage, and the branch pressure voltage is inputted
To comparison circuit；
Comparison circuit is connect with the bleeder circuit, for being compared according to the branch pressure voltage with predeterminated voltage, based on than
The adjusting of relatively result flows through the input terminal electric current of isolation linear optical coupling；
Triode, the base stage of the triode are connect with the output terminal of the linear optical coupling, for defeated according to the linear optical coupling
Voltage is penetrated in the electric current of the collector output of triode described in the current control gone out and pole, to adjust the regulator block input terminal
Voltage.
2. closed loop feedback regulator circuit according to claim 1, which is characterized in that the bleeder circuit includes：
First divider resistance, one end are connect with the regulator block input terminal, and the other end is connect with the second divider resistance；
Second divider resistance, one end are connect with the input terminal of the comparison circuit, other end ground connection.
3. closed loop feedback regulator circuit according to claim 1, which is characterized in that the comparison circuit includes：
For exporting the predeterminated voltage, the predeterminated voltage and the branch pressure voltage are compared for source of stable pressure, based on comparing
Output control output current.
4. closed loop feedback regulator circuit according to claim 3, which is characterized in that the source of stable pressure further includes：
Judging unit, for judging whether the branch pressure voltage is more than predeterminated voltage；
Control unit, in the case of being more than the predeterminated voltage in the branch pressure voltage, control the first electric current of output,
In, first electric current is used to control the electric current that the collector of the triode exports.
5. closed loop feedback regulator circuit according to claim 4, which is characterized in that described control unit is additionally operable to described
In the case that branch pressure voltage is less than the predeterminated voltage, control the second electric current of output, wherein, second electric current is less than described the
One electric current.
6. closed loop feedback regulator circuit according to claim 3, which is characterized in that the source of stable pressure is TL431.
7. closed loop feedback regulator circuit according to claim 1, which is characterized in that the linear optical coupling is additionally operable to according to institute
The electric current of output transistor in linear optical coupling described in the current control of comparison result output is stated, wherein, it is defeated in the linear optical coupling
Go out electric current of the electric current of transistor for changing the base stage of the triode.
8. closed loop feedback regulator circuit according to claim 7, which is characterized in that the closed loop feedback regulator circuit also wraps
It includes：
Base resistance, one end are connect with the output terminal of the linear optical coupling, and the other end is connect with the base stage of the triode, is used for
Base current is configured.
9. closed loop feedback regulator circuit according to claim 1, which is characterized in that the closed loop feedback regulator circuit also wraps
It includes：
Collector resistance is connect with the collector of the triode, for being divided.
10. closed loop feedback regulator circuit according to claim 9, which is characterized in that the closed loop feedback regulator circuit is also
Including：
A parallel resistance is penetrated in pole, and one end is connect with the collector resistance, and the other end is connect with the emitter of the triode, uses
In being shunted.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711174251.1A CN108153368B (en) | 2017-11-22 | 2017-11-22 | Closed loop feedback voltage stabilizing circuit |
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|---|---|---|---|
| CN201711174251.1A CN108153368B (en) | 2017-11-22 | 2017-11-22 | Closed loop feedback voltage stabilizing circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116978904A (en) * | 2023-07-27 | 2023-10-31 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
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| CN203324873U (en) * | 2013-06-03 | 2013-12-04 | 滁州继保电气科技有限公司 | Direct-current stabilized voltage power system |
| CN106774571A (en) * | 2016-11-30 | 2017-05-31 | 江苏丽隽功率半导体有限公司 | A kind of optocoupler voltage-stablizer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116978904A (en) * | 2023-07-27 | 2023-10-31 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
| CN116978904B (en) * | 2023-07-27 | 2024-02-23 | 屹晶微电子(台州)有限公司 | Power supply voltage stabilizing circuit and integrated chip |
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