CN204206573U - A kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power - Google Patents
A kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power Download PDFInfo
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- CN204206573U CN204206573U CN201420725588.2U CN201420725588U CN204206573U CN 204206573 U CN204206573 U CN 204206573U CN 201420725588 U CN201420725588 U CN 201420725588U CN 204206573 U CN204206573 U CN 204206573U
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Abstract
The utility model relates to LED for electrical domain, is specifically related to a kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power, comprising: differential motion amplifying unit, for carrying out parameter superposition differential amplify to sampling voltage and sampling current; Nonlinear adjustment unit, for carrying out Serial regulation to sampling voltage; Stray capacitance compensating unit, for comparing from the level of differential motion amplifying unit and the level of nonlinear adjustment unit, compensating and amplifying process, obtaining the output level of smooth steady; PWM control unit, for carrying out the adjustment of voltage and current when invariable power to the output level of stray capacitance compensating unit, this device can output constant power, and automatically can adjust output voltage and electric current according to different lamp pearl connection plan, adjusting range is wide, can the existing driving power specifications and models of assembling section, alleviate the stock pressure of production unit and practical unit.
Description
Technical field
The utility model relates to LED for electrical domain, is specifically related to a kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power.
Background technology
The driving demand that the voltage-current characteristic of LED lamp bead determines it is constant pressure and flow control form, because LED lamp bead pipe pressure VF exists certain error △ VF0.3-0.34, the consistency of product power ensures by electric current in drive circuit and Voltage Cortrol potentiometer, the degree of protection of waterproof power supply is restricted, only can reaches IP65.The mode of connection of LED lamp bead generally adopts high voltage-small current or low-voltage and high-current form, and often kind of mode of connection has certain limitation, and the driving power made is various in style, causes certain pressure to the stock of production and practical unit.
In view of this, need to provide a kind of and export the adjustable invariable power LED electric supply installation of Width funtion current power, can output constant power, and automatically can adjust output voltage and electric current according to different lamp pearl connection plan, adjusting range is wide, can the existing driving power specifications and models of assembling section, alleviate the stock pressure of production unit and practical unit, simultaneously because eliminate electric current and Voltage Cortrol potentiometer in existing drive circuit, the degree of protection of waterproof power supply is also increased to IP67.
Utility model content
The purpose of this utility model is to solve the problem, there is provided a kind of and export the adjustable invariable power LED electric supply installation of Width funtion current power, can output constant power, and automatically can adjust output voltage and electric current according to different lamp pearl connection plan, adjusting range is wide, can the existing driving power specifications and models of assembling section, alleviate the stock pressure of production unit and practical unit, simultaneously because eliminate electric current and Voltage Cortrol potentiometer in existing drive circuit, the degree of protection of waterproof power supply is also increased to IP67.
For achieving the above object, the technical solution adopted in the utility model is:
Export the invariable power LED electric supply installation that Width funtion current power is adjustable, comprising:
Differential motion amplifying unit, for carrying out parameter superposition differential amplify to sampling voltage and sampling current;
Nonlinear adjustment unit, for carrying out Serial regulation to sampling voltage;
Stray capacitance compensating unit, for comparing from the level of differential motion amplifying unit and the level of nonlinear adjustment unit, compensating and amplifying process, obtaining the output level of smooth steady;
PWM control unit, for carrying out the adjustment of voltage and current when invariable power to the output level of stray capacitance compensating unit.
Further, described sampling voltage is the sampling voltage of LED+ output voltage, and described sampling current is the sampling current of LED+ output current.
Further, described differential motion amplifying unit comprises differential amplifier circuit.
Further, described nonlinear adjustment unit carries out Serial regulation to sampling voltage and is: nonlinear sampling voltage is adjusted to linear sampling voltage.
Further, described stray capacitance compensating unit comprises stray capacitance and compensates amplifying circuit, compares the concussion produced and noise, compensates and amplifies process.
Further, described PWM control unit comprises photoelectrical coupler and pwm control circuit.
Further, described photoelectrical coupler drives pwm control circuit to carry out the adjustment of voltage and current when invariable power to the output level of stray capacitance compensating unit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the adjustable invariable power LED electric supply installation of output Width funtion current power of the present utility model;
Fig. 2 is the circuit diagram of the adjustable invariable power LED electric supply installation of output Width funtion current power of the present utility model.
Description of reference numerals:
1, differential motion amplifying unit; 2, nonlinear adjustment unit; 3, stray capacitance compensating unit;
4, PWM control unit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 1, of the present utility modelly a kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power, comprising:
Differential motion amplifying unit 1, comprises differential amplifier circuit, for carrying out parameter superposition differential amplify to sampling voltage and sampling current.
Nonlinear adjustment unit 2, for carrying out Serial regulation to sampling voltage, is adjusted to linear sampling voltage by nonlinear sampling voltage.
Stray capacitance compensating unit 3, for comparing from the level of differential motion amplifying unit and the level of nonlinear adjustment unit, compensating and amplifying process, obtaining the output level of smooth steady.Stray capacitance compensating unit 3 comprises stray capacitance and compensates amplifying circuit, compares the concussion produced and noise, compensates and amplifies process.
PWM control unit 4, comprises photoelectrical coupler and pwm control circuit, and photoelectrical coupler drives pwm control circuit to carry out the adjustment of voltage and current to drive different LED load to the output level of stray capacitance compensating unit when invariable power.
Wherein, sampling voltage is the sampling voltage of LED+ output voltage, and described sampling current is the sampling current of LED+ output current.
As shown in Figure 2, the sampling voltage of LED+ output voltage is represented with V0, the sampling current of LED+ output current is represented with I0, it is sent into respectively U1-2, U1-1 end of differential amplifier circuit, information and RP2, RP1 of the sampling current I0 of LED+ output current carry out superposing and export sampling voltage V0 with LED+ and carry out differential amplify through differential amplifier circuit U1, and the negative feedback that its objective is by exporting sampling voltage V0 realizes the size suppressing to export control level U1-3.Wherein, RP2 is maximum current setup control point, and RP1 is power output adjustable control point.
Output voltage sampling voltage V0 sends into nonlinear circuit U2-1 and superposes with voltage feedback factor control point RP3 and compare nonlinear adjustment as linearly to output to stray capacitance compensating circuit U3-2 by U2-4 again with R4 control point.Nonlinear adjustment circuit is by because power is different and LED pipe pressure nonlinear adjustment that error delta VF0.3-0.34 causes is linear, less compared with power variation rate when Width funtion, electric current to ensure in output.
Stray capacitance compensating circuit receives from differential amplifier circuit power adjustment level information by U3-1, and receive level information from nonlinear adjustment by U3-2 and compare with R5 and compensates amplifying circuit through stray capacitance and will produce when front end adjusts and shake and noise compares, compensates, amplifies and process to obtain required smooth steady output level information, and hold the control object to realize required invariable power, adjustment Width funtion, wide electric current by the FB that U3-4 delivers to V2 photoelectrical coupler control driving pwm control circuit.
Wherein, differential motion amplifying unit, nonlinear adjustment unit, stray capacitance compensating circuit, PWM control unit form into a self-feedback ciucuit.
Input power is connected with LED lamp bead with switching power circuit (comprising PFC circuit of power factor correction, inverse-excitation type conversion and LLC converter circuit, constant voltage and constant-current circuit etc.) through rectification circuit, by the self-feedback ciucuit that said units forms, realize the automatic control effect regulating Width funtion, wide electric current, constant power output.
The above is only better embodiment of the present utility model, therefore all equivalences done according to structure, feature and the principle described in the utility model patent claim change or modify, and are included in the utility model patent claim.
Claims (7)
1. export the invariable power LED electric supply installation that Width funtion current power is adjustable, it is characterized in that, comprising:
Differential motion amplifying unit, for carrying out parameter superposition differential amplify to sampling voltage and sampling current;
Nonlinear adjustment unit, for carrying out Serial regulation to sampling voltage;
Stray capacitance compensating unit, for comparing from the level of differential motion amplifying unit and the level of nonlinear adjustment unit, compensating and amplifying process, obtaining the output level of smooth steady;
PWM control unit, for carrying out the adjustment of voltage and current when invariable power to the output level of stray capacitance compensating unit.
2. the invariable power LED electric supply installation that output Width funtion current power according to claim 1 is adjustable, it is characterized in that, described sampling voltage is the sampling voltage of LED+ output voltage, described sampling current is the sampling current of LED+ output current.
3. the invariable power LED electric supply installation that output Width funtion current power according to claim 1 is adjustable, it is characterized in that, described differential motion amplifying unit comprises differential amplifier circuit.
4., according to a claim 1 invariable power LED electric supply installation that described output Width funtion current power is adjustable, it is characterized in that, described nonlinear adjustment unit carries out Serial regulation to sampling voltage and is: nonlinear sampling voltage is adjusted to linear sampling voltage.
5. the invariable power LED electric supply installation that output Width funtion current power according to claim 1 is adjustable, it is characterized in that, described stray capacitance compensating unit comprises stray capacitance and compensates amplifying circuit, compares the concussion produced and noise, compensates and amplifies process.
6. the invariable power LED electric supply installation that output Width funtion current power according to claim 1 is adjustable, is characterized in that, described PWM control unit comprises photoelectrical coupler and pwm control circuit.
7. the invariable power LED electric supply installation that output Width funtion current power according to claim 6 is adjustable, it is characterized in that, described photoelectrical coupler drives pwm control circuit to carry out the adjustment of voltage and current when invariable power to the output level of stray capacitance compensating unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725588.2U CN204206573U (en) | 2014-11-28 | 2014-11-28 | A kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420725588.2U CN204206573U (en) | 2014-11-28 | 2014-11-28 | A kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power |
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| Publication Number | Publication Date |
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| CN204206573U true CN204206573U (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420725588.2U Active CN204206573U (en) | 2014-11-28 | 2014-11-28 | A kind ofly export the adjustable invariable power LED electric supply installation of Width funtion current power |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163011A (en) * | 2016-08-25 | 2016-11-23 | 厦门方光电子科技有限公司 | Become compensation circuit and LED constant-power power source that constant current IC is invariable power IC |
| CN113346594A (en) * | 2021-06-29 | 2021-09-03 | 阳光电源股份有限公司 | Charging circuit, control method of charging circuit, controller of charging circuit and charging pile |
-
2014
- 2014-11-28 CN CN201420725588.2U patent/CN204206573U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163011A (en) * | 2016-08-25 | 2016-11-23 | 厦门方光电子科技有限公司 | Become compensation circuit and LED constant-power power source that constant current IC is invariable power IC |
| CN106163011B (en) * | 2016-08-25 | 2017-11-10 | 厦门方光电子科技有限公司 | Become compensation circuit and LED constant-power power source of the constant current IC into invariable power IC |
| CN113346594A (en) * | 2021-06-29 | 2021-09-03 | 阳光电源股份有限公司 | Charging circuit, control method of charging circuit, controller of charging circuit and charging pile |
| CN113346594B (en) * | 2021-06-29 | 2024-02-09 | 阳光电源股份有限公司 | Charging circuit, control method of charging circuit, controller of charging circuit and charging pile |
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