CN208888684U - A kind of voltage-controlled power supply - Google Patents
A kind of voltage-controlled power supply Download PDFInfo
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- CN208888684U CN208888684U CN201821784181.1U CN201821784181U CN208888684U CN 208888684 U CN208888684 U CN 208888684U CN 201821784181 U CN201821784181 U CN 201821784181U CN 208888684 U CN208888684 U CN 208888684U
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Abstract
This application involves technical field of electronic equipment, more particularly to a kind of voltage-controlled power supply, it include: power supply, output circuit, feed circuit, the output circuit, feed circuit are connected to power supply, it is connected between output circuit and feed circuit, further includes biasing circuit, biasing circuit includes resistance R2, ground resistance R3, the resistance R2 is connected to feed circuit, is connected with voltage input end between resistance R2 and ground resistance R3.The voltage regulating device that the application selects is conventional, electric-resistance, and cost is well below digital regulation resistance, therefore the cost of the application is lower.The application structure is simple, is beneficial to produce in enormous quantities.
Description
Technical field
This application involves power circuit field more particularly to a kind of voltage-controlled power supplies.
Background technique
Laser radar is using LED or laser as transmitting light source, using detecting technique means active away from
From detecting devices.The electronic components such as photodetector, master control borad inside laser radar need voltage control in a certain range
It is interior, have the demand of some supply voltage of real-time control.If the too high or too low voltage rating beyond electronic component of supply voltage
It will result in the damage of electronic component.
Existing power supply is many kinds of, mostly low side power supply, although low-end product has price excellent with respect to high-end product
Gesture, quality are not so good as people's will, there is a problem of having a single function, the service life is short, precision is insufficient, and power supply selects high-end power supply, though
The problem of right performance is stablized, and precision is high, but there are selling at exorbitant prices, complex circuit designs.
To solve the above problems, those skilled in the art improve power supply circuit, a kind of such as simple electricity
Source chip, circuit setting as shown in Figure 1,
If the voltage of output end is Vo, the voltage of feedback end is Vf, then has:
Wherein feedback end voltage Vf is steady state value, changes the i.e. changeable output voltage Vo of ratio of R1 and R2.When in formula
When R1, Vf are set as definite value, then output voltage is the inverse proportion function of ground resistance R2, and Vf adjusts very little numerical value, can also allow defeated
Great changes will take place by voltage Vf out, it is difficult to fine adjustment.
If adjusting voltage using digital regulation resistance, i.e., resistance R2 is changed to digital regulation resistance, because of output end voltage
Variation range is larger, and feedback end voltage Vf is constant, and the operating voltage variation range of digital regulation resistance also can be larger, and generally counts
The pressure-resistant range of word potentiometer is very limited, tends not to meet actual demand.
Utility model content
The embodiment of the present application is to propose a kind of voltage-controlled power supply have at low cost, performance stabilization, advantage with high accuracy.
For this purpose, the application uses following technical scheme:
On the one hand, a kind of voltage-controlled power supply, comprising: power supply, output circuit, feed circuit, the output circuit, feedback electricity
Road is connected to power supply, is connected between output circuit and feed circuit, further includes biasing circuit, and biasing circuit includes resistance R2, connects
Ground resistance R3, the resistance R2 are connected to feed circuit, are connected with voltage input end between resistance R2 and ground resistance R3.
In one possible implementation, the feed circuit includes a divider resistance R1, R1 and feedback end it
Between be equipped with a node, resistance R2 is connected to by node with feed circuit.
In one possible implementation, 20R2≤R1≤200R2.
In one possible implementation, R1=100R2.
In one possible implementation, the voltage input end is used for biasing circuit input voltage.
In one possible implementation, the input voltage is variable voltage, is realized by DAC or PWM filtering.
In one possible implementation, the input voltage is 10-220V.
The embodiment of the present application overcomes the deficiencies in the prior art, is controlled using biasing circuit voltage in embodiment,
R1, R2, the R3 used in feed circuit, biasing circuit is conventional, electric-resistance, and cost is well below digital regulation resistance, therefore this Shen
In cost ratio Fig. 1 please R2 be changed to digital regulation resistance cost it is lower.The application structure is simple, is beneficial to produce in enormous quantities.
Detailed description of the invention
Fig. 1 is background technique schematic illustration.
Fig. 2 is the voltage-controlled power supply circuit that the embodiment of the present application 1 provides.
Specific embodiment
Further illustrate the technical solution of the application below with reference to the accompanying drawings and specific embodiments.
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present 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 make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only
The embodiment of the application a part, instead of all the embodiments.Based on the embodiment in the application, ordinary skill people
Member's every other embodiment obtained without making creative work, all should belong to the model of the application protection
It encloses.
It should be noted that the description and claims of this application and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to embodiments herein described herein.In addition, term " includes " and " tool
Have " and their any deformation, it is intended that cover it is non-exclusive include, for example, containing a series of steps or units
Process, method, system, product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include without clear
Other step or units listing to Chu or intrinsic for these process, methods, product or equipment.
The present embodiment voltage-controlled power supply, comprising: power supply, output circuit, feed circuit, described output circuit one end and power supply
Connection, the other end is voltage output end, output voltage Vo.The is equipped on output circuit between power supply and voltage output end
One node 1, by being connected between first node 1 and output circuit, the feed circuit other end is connected to feed circuit with power supply, feedback
Voltage is Vf.Voltage-controlled power supply further includes biasing circuit, and biasing circuit includes resistance R2, ground resistance R3, and the resistance R2 passes through
Second node 2 is connected to feed circuit, and third node 3 is equipped between resistance R2 and ground resistance R3, is connected with voltage input end.
The feed circuit includes a divider resistance R1, and a node is equipped between R1 and feedback end, and point resistance R2 passes through
Node is connected to feed circuit.
Output voltage is Vo in the application, feedback voltage Vf, and voltage input end is used for input voltage, and input voltage is
Vc.Voltage on resistance R1, R2, R3 is respectively Vr1, Vr2, Vr3, because R1, R2, R3 connect, all-in resistance is equal to Vo, then has:
Vo=Vr1+Vr2+Vr3, and know Vr3=Vc, Vr2=Vf-Vc；The input current of feedback end is minimum, can calculate with 0, then
Electric current in R1, R2 is identical, is set as Ir.
Then output end voltage Vo=Vc+(R1+R2) * Ir；
Vr2=Vf-Vc is substituted into output end voltage formula, and formula is converted:
Since R1, R2, Vf are definite value, therefore the linear function that Vo is input voltage Vc is exported, Vo is linear with the increase of Vc
Reduce.When Vc is 0, output voltage is maximum, and maximum value is, when R1 is 0, output voltage is minimum, minimum value
It is Vf.
Using the voltage-controlled power supply in the present embodiment, by adjusting input voltage Vc, make output voltage Vo in Vf andBetween linear change, output voltage is accurately adjustable.
R1, R2, R3 resistance are arbitrary value in the present embodiment, but in practical applications, 20R2≤R1≤200R2, output electricity
Pressure value is 21vf to 201Vf.It is further R1=100R2, maximum output voltage 101Vf.
R1, R2, the R3 used in feed circuit, biasing circuit is conventional, electric-resistance, and cost is well below digital regulation resistance.
Circuit structure is simple, easy to produce.
The input voltage is variable voltage, is realized using DAC or PWM filtering.
In real work, the input voltage selects 10-220V.
Describe the technical principle of the application in conjunction with specific embodiments above.These descriptions are intended merely to explain the application's
Principle, and it cannot be construed to the limitation to the application protection scope in any way.Based on the explanation herein, the technology of this field
Personnel do not need to pay for creative labor the other specific embodiments that can associate the application, these modes are fallen within
Within the protection scope of the application.
Claims (7)
1. a kind of voltage-controlled power supply, comprising: power supply, output circuit, feed circuit, the output circuit, feed circuit and power supply
Connection, is connected between output circuit and feed circuit, which is characterized in that further include biasing circuit, biasing circuit include resistance R2,
Ground resistance R3, the resistance R2 are connected to feed circuit, are connected with voltage input end between resistance R2 and ground resistance R3.
2. voltage-controlled power supply according to claim 1, which is characterized in that the feed circuit includes a divider resistance R1,
A node is equipped between R1 and feedback end, resistance R2 is connected to by node with feed circuit.
3. voltage-controlled power supply according to claim 2, which is characterized in that 20R2≤R1≤200R2.
4. voltage-controlled power supply according to claim 3, which is characterized in that R1=100R2.
5. voltage-controlled power supply according to claim 1, which is characterized in that the voltage input end is used for defeated to biasing circuit
Enter voltage.
6. voltage-controlled power supply according to claim 5, which is characterized in that the input voltage is variable voltage, passes through DAC
Or PWM filtering is realized.
7. voltage-controlled power supply according to claim 6, which is characterized in that the input voltage is 10-220V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784181.1U CN208888684U (en) | 2018-10-31 | 2018-10-31 | A kind of voltage-controlled power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821784181.1U CN208888684U (en) | 2018-10-31 | 2018-10-31 | A kind of voltage-controlled power supply |
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| CN208888684U true CN208888684U (en) | 2019-05-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109189143A (en) * | 2018-10-31 | 2019-01-11 | 北醒（北京）光子科技有限公司 | A kind of voltage-controlled power supply |
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2018
- 2018-10-31 CN CN201821784181.1U patent/CN208888684U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109189143A (en) * | 2018-10-31 | 2019-01-11 | 北醒（北京）光子科技有限公司 | A kind of voltage-controlled power supply |
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