CN109002074A - Linear voltage-stabilizing circuit, method for stabilizing voltage and the electric power management circuit using it - Google Patents
Linear voltage-stabilizing circuit, method for stabilizing voltage and the electric power management circuit using it Download PDFInfo
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- CN109002074A CN109002074A CN201811062464.XA CN201811062464A CN109002074A CN 109002074 A CN109002074 A CN 109002074A CN 201811062464 A CN201811062464 A CN 201811062464A CN 109002074 A CN109002074 A CN 109002074A
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- voltage
- resistance
- circuit
- stabilizing circuit
- linear voltage
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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
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
The present invention proposes its electric power management circuit of a kind of linear voltage-stabilizing circuit, method for stabilizing voltage and application, and the linear voltage-stabilizing circuit includes operational amplifier and adjustment pipe, and the output end of the operational amplifier is connect with the control terminal for adjusting pipe；The first end of the adjustment pipe receives input voltage, the second end of the adjustment pipe is connected to ground through impedance circuit, the connection of the second end of the impedance circuit and operational amplifier, input voltage obtains sampled voltage through partial pressure, the sampled voltage is connect after filtering with the first end of the operational amplifier, output end of the second end of the adjustment pipe as the linear voltage-stabilizing circuit.Linear voltage-stabilizing circuit of the present invention can integrate in piece, and peripheral circuit is simple, output voltage stabilization.
Description
Technical field
The present invention relates to field of power electronics, in particular to a kind of linear voltage-stabilizing circuit, method for stabilizing voltage and the electricity using it
Power management circuits.
Background technique
Prior art power management circuit schematic diagram is as shown in Figure 1, exchange input obtains input electricity by rectification circuit U00
Press VIN, shunt capacitance C0 between input voltage VIN and ground, the filtered electrical that input voltage VIN is made up of inductance L0 and capacitor C1
Adjustment pipe M01 drain electrode is output to after the filtering of road, load and capacitor C2 are in parallel, and load voltage, that is, output voltage is Vout=VIN-
Iload*RMOS, wherein RMOSFor the equivalent resistance for adjusting pipe M01, IloadFor load current.Due to the input voltage VIN after rectification
Higher, filter inductance L0 and capacitor C1 are larger, are not easy to be integrated in piece, and output voltage Vout is with load current IloadChange
Change and changes, it is unstable so as to cause output voltage.
Summary of the invention
The object of the present invention is to provide a kind of linear voltage-stabilizing circuit that can integrate in piece, method for stabilizing voltage and apply its
Electric power management circuit, there are electric power management circuit output voltages for solving the problems, such as the prior art changes with load current.
To achieve the above object, the present invention provides a kind of linear voltage-stabilizing circuits for electric power management circuit, including fortune
Amplifier and adjustment pipe are calculated, the output end of the operational amplifier is connect with the control terminal of the adjustment pipe；The adjustment pipe
First end receives input voltage, and the second end of the adjustment pipe is connected to ground through impedance circuit, and the impedance circuit is put with operation
The second end connection of big device, input voltage obtain sampled voltage through partial pressure, and the sampled voltage is put after filtering with the operation
The first end connection of big device, output end of the second end of the adjustment pipe as the linear voltage-stabilizing circuit.
Optionally, the linear voltage-stabilizing circuit further includes the first current source, and first current source exports the first electric current, institute
It states the first electric current and pulls down the sampled voltage.
Optionally, when the difference of the valley of input voltage and output voltage is less than the first reference voltage, first electricity
Stream increases；When the difference of the average value of input voltage and output voltage is greater than the second reference voltage, first electric current reduces,
When first electric current is reduced to the first reference current, the first electric current is constant.
Optionally, the linear voltage-stabilizing circuit further includes first resistor and second resistance, and the first resistor first terminates
Receive input voltage, the first resistor second end connects the second resistance, the second resistance ground connection, the first resistor and
Second resistance common end voltage is the sampled voltage, and first current source connects the first resistor and described second
The common end of resistance.
Optionally, the linear voltage-stabilizing circuit further includes filter circuit, and the filter circuit includes 3rd resistor and first
Capacitor, the 3rd resistor first end receive the sampled voltage, and the 3rd resistor second end connects the first capacitor the
One end, the first capacitor second end ground connection.
Optionally, the linear voltage-stabilizing circuit further includes the impedance circuit, the impedance circuit include the 4th resistance and
5th resistance, the 4th resistance first end connect the adjustment pipe second end, the 4th resistance second end and the described 5th
The connection of resistance first end, the 5th resistance eutral grounding, the 4th resistance connect described the with the common end of the 5th resistance
One amplifier second end.
Optionally, the resistance value ratio and the 4th resistance and the 5th resistance of the first resistor and the second resistance
Resistance value ratio it is identical.
The invention also discloses a kind of electric power management circuits, including switching circuit and a kind of linear voltage stabilization electricity of any of the above
Road, the switching circuitry output connect the linear voltage-stabilizing circuit input terminal.
Optionally, the linear voltage-stabilizing circuit is integrated in piece, and the input terminal and output end of the linear voltage-stabilizing circuit are made
For two pins of chip.
The invention also discloses a kind of linear voltage stabilization method, exchange input obtains input voltage after switching circuit, to defeated
Enter voltage to be divided to obtain sampled voltage, the sampled voltage is used as reference voltage after filtering, and the reference voltage is through transporting
It puts and adjustment is in control stable output voltage.
Compared with prior art, the invention has the following advantages that exchange input obtains input voltage after switching circuit, it is right
Input voltage is divided to obtain sampled voltage, and the sampled voltage is in control as benchmark through amplifier and adjustment flat after filtering
Steady output voltage.Linear voltage-stabilizing circuit of the present invention, which has, preferably goes ripple effect, can be integrated in piece, apply in power supply
It manages in circuit, peripheral circuit is simple, and its output voltage stabilization, does not change with the variation of load current.
Detailed description of the invention
Fig. 1 is prior art power supply pipe circuit diagram；
Fig. 2 is power management circuit schematic diagram of the present invention；
Fig. 3 is linear voltage-stabilizing circuit schematic diagram of the present invention；
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. 2 illustrates power management circuit schematic diagram of the present invention, including rectification circuit U00, capacitor C0, linear voltage-stabilizing circuit
U01, capacitor C2 and load.Exchange input AC obtains input voltage VIN by rectification circuit U00, and capacitor C0 is connected in parallel on rectified current
Road U00 output end.Linear voltage-stabilizing circuit U01 input terminal connects rectification circuit U00 output end, output end connection load, load
Both ends shunt capacitance C2, linear voltage-stabilizing circuit U01 can integrate in piece, the input terminal and output end of linear voltage-stabilizing circuit U01
As chip pin, chip periphery circuit is simple, saves cost.
Fig. 3 illustrates linear voltage-stabilizing circuit schematic diagram of the present invention, the linear voltage-stabilizing circuit include resistance R1, resistance R2,
First current source I1, resistance R3, capacitor C1, amplifier U101, adjustment pipe M01, resistance R4 and resistance R5.Resistance R1 first end conduct
Voltage regulator circuit input terminal, resistance R1 second end connect resistance R2 first end, resistance R2 second end ground connection, the first current source I1 connection
The common end of resistance R1 and resistance R2, the first current source I1 export the first electric current.Resistance R3 and capacitor C1 forms filter circuit, electricity
The common end of R3 first end connection connection resistance R1 and resistance R2 is hindered, resistance R3 second end connects capacitor C1 first end, capacitor C1
Second end ground connection.Amplifier U101 non-inverting input terminal connects the common end of resistance R3 and capacitor C1, and inverting input terminal connects resistance
The common end of R4 and resistance R5, output end connection adjustment pipe M101 grid.It adjusts pipe M101 drain electrode and receives input voltage VIN,
It adjusts pipe M101 source electrode and connects resistance R4 first end, resistance R4 second end is connected with resistance R5 first end, and resistance R5 second is terminated
Ground, adjustment pipe M101 source voltage are the output voltage Vout of linear voltage-stabilizing circuit of the present invention.Vout only with the first electric current I1 and
Resistance is related, unrelated with load current.As R1/R2=R4/R5, output voltage Vout=VDD-I1*R1, because of the first electric current
I1 and R1 are fixed, so output voltage Vout stable.When input voltage VIN ripple is too big, input voltage VIN valley and output
The pressure difference of voltage Vout is too small, and the performance of circuit can be deteriorated, and does not inhibit ripple；When input voltage VIN and output voltage Vout
Pressure difference it is too big when, adjustment pipe power consumption it is very big.Therefore, when the difference of the valley of input voltage VIN and output voltage Vout is less than
When the first reference voltage VREF1, the first electric current I1 increases, to inhibit output voltage Vout ripple；When input voltage VIN
When the difference of average value and output voltage Vout are greater than the second reference voltage VREF2, the first electric current I1 reduces, when described the
When one electric current I1 is reduced to the first reference current IREF, the first electric current I1 is constant, excessive to avoid adjustment pipe power consumption, simultaneously
Guarantee that adjustment pipe works normally.It can detecte input voltage valley by valley value detection circuit, although not having in attached drawing of the present invention
The schematic diagram of valley value detection circuit, still, for those of ordinary skills, not needing attached drawing valley value detection circuit is also
It may be implemented.
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 (10)
1. a kind of linear voltage-stabilizing circuit, including operational amplifier and adjustment pipe, the output end of the operational amplifier and the tune
The control terminal of homogeneous tube connects；It is characterized by: the first end of the adjustment pipe receives input voltage, the second end of the adjustment pipe
It is connected to ground, the second end connection of the impedance circuit and operational amplifier through impedance circuit, input voltage is adopted through partial pressure
Sample voltage, the sampled voltage are connect after filtering with the first end of the operational amplifier, and the second end of the adjustment pipe is made
For the output end of the linear voltage-stabilizing circuit.
2. linear voltage-stabilizing circuit according to claim 1, it is characterised in that: the linear voltage-stabilizing circuit further includes the first electricity
Stream source, first current source export the first electric current, and first electric current pulls down the sampled voltage.
3. linear voltage-stabilizing circuit according to claim 2, it is characterised in that: when the valley and output voltage of input voltage
When difference is less than the first reference voltage, first electric current increases；When the average value of input voltage and the difference of output voltage are big
When the second reference voltage, first electric current reduces, when first electric current is reduced to the first reference current, described first
Electric current is constant.
4. linear voltage-stabilizing circuit according to claim 2 or 3, it is characterised in that: the linear voltage-stabilizing circuit further includes
One resistance and second resistance, the first resistor first end receive input voltage, the first resistor second end connection described the
Two resistance, the second resistance ground connection, the first resistor and second resistance common end voltage are the sampled voltage, institute
State the common end that the first current source connects the first resistor and the second resistance.
5. linear voltage-stabilizing circuit according to claim 4, it is characterised in that: the linear voltage-stabilizing circuit further includes filtered electrical
Road, the filter circuit include 3rd resistor and first capacitor, and the 3rd resistor first end receives the sampled voltage, described
3rd resistor second end connects the first capacitor first end, the first capacitor second end ground connection.
6. linear voltage-stabilizing circuit according to claim 4, it is characterised in that: the linear voltage-stabilizing circuit further includes the resistance
Reactive circuit, the impedance circuit include the 4th resistance and the 5th resistance, and the 4th resistance first end connects the adjustment pipe the
Two ends, the 4th resistance second end are connected with the 5th resistance first end, the 5th resistance eutral grounding, the 4th resistance
The first amplifier second end is connected with the common end of the 5th resistance.
7. linear voltage-stabilizing circuit according to claim 6, it is characterised in that: the first resistor and the second resistance
Resistance value ratio and the 4th resistance are identical as the resistance value ratio of the 5th resistance.
8. a kind of electric power management circuit, it is characterised in that: including any one linear voltage stabilization in switching circuit and claim 1-6
Circuit, the switching circuitry output connect the linear voltage-stabilizing circuit input terminal.
9. electric power management circuit according to claim 7, it is characterised in that: the linear voltage-stabilizing circuit is integrated in piece,
Two pins of the input terminal and output end of the linear voltage-stabilizing circuit as chip.
10. a kind of linear voltage stabilization method, it is characterised in that: exchange input obtains input voltage after switching circuit, to input electricity
Pressure is divided to obtain sampled voltage, and the sampled voltage is used as reference voltage after filtering, the reference voltage through amplifier and
Adjustment is in control stable output voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062464.XA CN109002074A (en) | 2018-09-12 | 2018-09-12 | Linear voltage-stabilizing circuit, method for stabilizing voltage and the electric power management circuit using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811062464.XA CN109002074A (en) | 2018-09-12 | 2018-09-12 | Linear voltage-stabilizing circuit, method for stabilizing voltage and the electric power management circuit using it |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109002074A true CN109002074A (en) | 2018-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811062464.XA Pending CN109002074A (en) | 2018-09-12 | 2018-09-12 | Linear voltage-stabilizing circuit, method for stabilizing voltage and the electric power management circuit using it |
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| CN (1) | CN109002074A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109714869A (en) * | 2019-03-07 | 2019-05-03 | 无锡奥利杰科技有限公司 | A kind of LED illumination driving current Serial regulation and adjusting control circuit |
| CN114944830A (en) * | 2022-07-22 | 2022-08-26 | 三微电子科技(苏州)有限公司 | Filter circuit |
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| CN1825240A (en) * | 2006-03-24 | 2006-08-30 | 启攀微电子（上海）有限公司 | Low voltage difference linear voltage stabilizer circuit |
| CN102609023A (en) * | 2012-03-12 | 2012-07-25 | 北京经纬恒润科技有限公司 | Built-in analog power supply circuit |
| CN204856270U (en) * | 2015-07-31 | 2015-12-09 | 河南西瑞医疗电子技术有限公司 | Positive voltage stabilizing circuit of step -down molded lines nature with adjustable exportable zero |
| CN107231325A (en) * | 2016-03-25 | 2017-10-03 | 快捷半导体(苏州)有限公司 | Signal receiving circuit and method, signal deteching circuit |
| CN208805746U (en) * | 2018-09-12 | 2019-04-30 | 杰华特微电子（杭州）有限公司 | Linear voltage-stabilizing circuit and the electric power management circuit for applying it |
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Patent Citations (5)
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| CN1825240A (en) * | 2006-03-24 | 2006-08-30 | 启攀微电子（上海）有限公司 | Low voltage difference linear voltage stabilizer circuit |
| CN102609023A (en) * | 2012-03-12 | 2012-07-25 | 北京经纬恒润科技有限公司 | Built-in analog power supply circuit |
| CN204856270U (en) * | 2015-07-31 | 2015-12-09 | 河南西瑞医疗电子技术有限公司 | Positive voltage stabilizing circuit of step -down molded lines nature with adjustable exportable zero |
| CN107231325A (en) * | 2016-03-25 | 2017-10-03 | 快捷半导体(苏州)有限公司 | Signal receiving circuit and method, signal deteching circuit |
| CN208805746U (en) * | 2018-09-12 | 2019-04-30 | 杰华特微电子（杭州）有限公司 | Linear voltage-stabilizing circuit and the electric power management circuit for applying it |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109714869A (en) * | 2019-03-07 | 2019-05-03 | 无锡奥利杰科技有限公司 | A kind of LED illumination driving current Serial regulation and adjusting control circuit |
| CN114944830A (en) * | 2022-07-22 | 2022-08-26 | 三微电子科技(苏州)有限公司 | Filter circuit |
| CN114944830B (en) * | 2022-07-22 | 2022-11-04 | 三微电子科技(苏州)有限公司 | Filter circuit |
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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. |