CN207083018U - A kind of adjustable circuit of output voltage - Google Patents
A kind of adjustable circuit of output voltage Download PDFInfo
- Publication number
- CN207083018U CN207083018U CN201720807270.2U CN201720807270U CN207083018U CN 207083018 U CN207083018 U CN 207083018U CN 201720807270 U CN201720807270 U CN 201720807270U CN 207083018 U CN207083018 U CN 207083018U
- Authority
- CN
- China
- Prior art keywords
- output voltage
- circuit
- operational amplifier
- resistance
- adjustable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
It the utility model is related to a kind of adjustable circuit of output voltage, including main circuit and differential amplifier circuit, main circuit provides burning voltage power supply for operational amplifier, differential amplifier circuit includes operational amplifier, output voltage is controlled by the voltage swing of differential amplifier circuit input signal, so as to realize that output voltage is adjustable.The utility model uses less component, simple control mode, you can realize that output voltage is adjustable, and it is simple in construction, cost is cheap.
Description
Technical field
It the utility model is related to DC/DC switch power technologies field, and in particular to a kind of adjustable circuit of output voltage.
Background technology
At present, switch power technology is applied quite varied, and many occasions have the adjustable use demand of output voltage, for
The adjustable control mode of output voltage and method are also varied.Output is realized typically by way of changing sampling resistor
Voltage is adjustable, and such a mode is simple and reliable, but output voltage adjustable range is extremely limited, require output voltage adjustable range compared with
Under big occasion, the method can not be realized.
Utility model content
In order to solve the above technical problems, the purpose of this utility model is to provide a kind of adjustable circuit of output voltage, pass through
The voltage swing for adjusting differential amplifier circuit input signal controls output voltage, so as to realizing the adjustable of output voltage.
To achieve the above object, the utility model provides a kind of adjustable circuit of output voltage, including main circuit and difference
Divide amplifying circuit, the main circuit includes transformer T, switching tube Q1, commutation diode D1 and electric capacity C1, the transformer T's
Armature winding Same Name of Ends connecting valve pipe Q1 drain, its armature winding different name end connection positive source, switching tube Q1 source electrode
Power cathode is connected, transformer T secondary windings Same Name of Ends connects the anode of the commutation diode D1, its secondary windings different name
End ground connection, the negative electrode of electric capacity C1 one end connection commutation diode D1, its other end ground connection, the moon of the commutation diode D1
Operational amplifier U1 power end in pole connection differential amplifier circuit.
Further, the differential amplifier circuit includes operational amplifier U1, the anti-phase input of the operational amplifier U1
End is connected through resistance R1 with positive source, and its in-phase input end is connected through resistance R2 with power cathode, the operational amplifier U1
Inverting input connect its output end through resistance R3, its in-phase input end through resistance R4 be grounded, operational amplifier U1 output
End and resistance R4 earth terminal are connected with load.
As an improvement, the operational amplifier U1 selects LTC6090 high voltage operational amplifiers.
From above technical scheme, main circuit provides stable voltage electricity for operational amplifier U1 in the utility model
Source, differential amplifier circuit include operational amplifier U1, and output is adjusted by operational amplifier U1 applied signal voltage size
Voltage swing, so as to realize the adjustable purpose of the size of circuit output voltage, and component number used in the utility model
Measure it is less, it is simple in construction, it is easily controllable.
Brief description of the drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described further below in conjunction with the accompanying drawings：
As shown in figure 1, the utility model provides the adjustable circuit of output voltage, including main circuit and differential amplification electricity
Road, main circuit include transformer T, switching tube Q1, commutation diode D1 and electric capacity C1, and transformer T armature winding Same Name of Ends connects
Switching tube Q1 drain is connect, its armature winding different name end connection positive source, switching tube Q1 source electrode connection power cathode, transformation
Device T secondary windings Same Name of Ends connection commutation diode D1 anode, its secondary windings different name end ground connection, the connection of electric capacity C1 one end
Commutation diode D1 negative electrode, its other end ground connection, commutation diode D1 negative electrode connect operation amplifier in differential amplifier circuit
Device U1 power end.Main circuit provides stable voltage source for operational amplifier U1, and its structure is not limited to anti-shown in figure
Swash formula structure, can also be the other structures such as positive activation type structure.
Specifically, differential amplifier circuit includes operational amplifier U1, and operational amplifier U1 inverting input is through resistance
R1 is connected with positive source, and its in-phase input end is connected through resistance R2 with power cathode, operational amplifier U1 inverting input
Its output end is connected through resistance R3, its in-phase input end is grounded through resistance R4, operational amplifier U1 output end and resistance R4's
Earth terminal is connected with load, by adjusting differential amplifier circuit applied signal voltage size, to control output voltage size, so as to
Go for the occasion for needing voltage regulation limits larger.
Specifically, LTC6090 high voltage operational amplifiers can be selected in operational amplifier U1, can also select such as
The high voltage operational amplifier of LTC6090 classes.
Operation principle of the present utility model is：
When operational amplifier U1 applied signal voltages are respectively V+And V-When, output end voltage Vout+, its numerical relation
For：
By adjusting operational amplifier U1 applied signal voltages V+And V-Size, output end voltage Vout can be adjusted+'s
Size.
Embodiment described above is only that preferred embodiment of the present utility model is described, not to this practicality
New scope is defined, and on the premise of the utility model design spirit is not departed from, those of ordinary skill in the art are to this
The various modifications and improvement that the technical scheme of utility model is made, the protection of the utility model claims book determination all should be fallen into
In the range of.
Claims (3)
- A kind of 1. adjustable circuit of output voltage, it is characterised in that：Including main circuit and differential amplifier circuit, the main circuit includes Transformer T, switching tube Q1, commutation diode D1 and electric capacity C1, the transformer T armature winding Same Name of Ends connecting valve pipe Q1 drain, its armature winding different name end connection positive source, switching tube Q1 source electrode connection power cathode, transformer T time Level Motor Winding Same Name of Ends connects the anode of the commutation diode D1, and its secondary windings different name end ground connection, described electric capacity C1 one end connects Commutation diode D1 negative electrode is connect, its other end ground connection, the negative electrode of the commutation diode D1 connects to be transported in differential amplifier circuit Calculate amplifier U1 power end.
- 2. adjustable circuit of output voltage according to claim 1, it is characterised in that：The differential amplifier circuit includes computing Amplifier U1, the operational amplifier U1 inverting input are connected through resistance R1 with positive source, and its in-phase input end is through electricity Resistance R2 is connected with power cathode, and the inverting input of the operational amplifier U1 connects its output end through resistance R3, and it is the same as mutually defeated Enter end to be grounded through resistance R4, operational amplifier U1 output end and resistance R4 earth terminal are connected with load.
- 3. adjustable circuit of output voltage according to claim 2, it is characterised in that：The operational amplifier U1 is selected LTC6090 high voltage operational amplifiers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807270.2U CN207083018U (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable circuit of output voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720807270.2U CN207083018U (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable circuit of output voltage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207083018U true CN207083018U (en) | 2018-03-09 |
Family
ID=61426940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720807270.2U Expired - Fee Related CN207083018U (en) | 2017-07-05 | 2017-07-05 | A kind of adjustable circuit of output voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207083018U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601536A (en) * | 2018-11-24 | 2019-12-20 | 西安霍威电源有限公司 | High-voltage large-range adjustable laser power supply module with super-large capacitor |
-
2017
- 2017-07-05 CN CN201720807270.2U patent/CN207083018U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110601536A (en) * | 2018-11-24 | 2019-12-20 | 西安霍威电源有限公司 | High-voltage large-range adjustable laser power supply module with super-large capacitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180309 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |