CN208609234U - A kind of LED constant-current control circuit and LED lamp - Google Patents
A kind of LED constant-current control circuit and LED lamp Download PDFInfo
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- CN208609234U CN208609234U CN201820480946.6U CN201820480946U CN208609234U CN 208609234 U CN208609234 U CN 208609234U CN 201820480946 U CN201820480946 U CN 201820480946U CN 208609234 U CN208609234 U CN 208609234U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model belongs to technical field of LED illumination, provides a kind of LED constant-current control circuit and LED lamp comprising: power module, the power module is for providing working power；Sampling unit, the sampling unit are connect with the LED light, for acquiring the output electric current of the LED light, and export sampled current signals；Chip is controlled, the control chip is connect with the sampling unit, exports control signal according to the sampled current signals；Switch unit, the control unit of the switch unit are connect with the control chip, are received the control signal, are controlled the disconnection and closure of the LED light；Filter unit, the filter unit are connected between the control chip and the switch unit, for being filtered to the control signal.
Description
Technical field
The utility model belongs to technical field of LED illumination more particularly to a kind of LED constant-current control circuit and LED lamp.
Background technique
Illumination is that we produce and one of essential energy consumption of living, today the huge illumination power consumption in the whole world with
And the lighting apparatus of low transfer efficiency has made the waste of the energy increasingly sharpen.
LED is small in size with its, low power consuming, service life length, high brightness, low in calories, environmentally friendly, sturdy and durable, and the response time is short etc.
Advantageous characteristic has attracted global eyeball, so LED green light source replaces conventional illumination sources, becomes best emerging energy-saving light
Source has been trend of the times.However, LED power mostly uses greatly two schemes now, first is that front end uses constant voltage source, then exist
Constant-current control circuit is concatenated in LED light source, electric current is constant when the method can guarantee LED operation although, but specified in LED light source
When electric current is larger, constant-current control circuit loss is larger, reduces the efficiency of power supply.Second is to directly adopt constant-current source as LED
Light source power supply, but such method will change constant current source output current, can make the photochromic hair of LED light source when LED light source dims
Changing influences illuminating effect, while accelerating the light decay speed of LED, reduces the service life of LED.
Therefore, that there are circuit structures in traditional technical solution is complicated, circuit loss is high, circuit service life is short asks
Topic.
Utility model content
The purpose of this utility model is to provide a kind of LED constant-current control circuit and LED lamps, it is intended to solve traditional skill
The problem that circuit structure present in art scheme is complicated, circuit loss is high, circuit service life is short.
A kind of LED constant-current control circuit, the LED constant-current control circuit include:
Power module, the power module is for providing working power；
Sampling unit, the sampling unit are connect with the LED light, for acquiring the output electric current of the LED light, and it is defeated
Sampled current signals out；
Chip is controlled, the control chip is connect with the sampling unit, is exported and is controlled according to the sampled current signals
Signal；
The input terminal of switch unit, the control terminal of the switch unit and the switch unit connects with the control chip
It connects, receives the control signal, control the output of the LED light；
Filter unit, the filter unit are connected between the control chip and the switch unit, for described
Control signal is filtered.
In one embodiment, the switch unit is metal-oxide-semiconductor or triode.
In one embodiment, the filter unit includes first resistor and first capacitor, the first resistor connection
Between control chip and the control terminal of the switch unit, the first capacitor is connected to the control of the switch unit
Between end and ground.
In one embodiment, the control signal is pwm signal.
It in one embodiment, further include light-sensitive device, the light-sensitive device is connect with the control chip, the light
Sensing device detects ambient light signal, to judge current light environment.
In one embodiment, the light-sensitive device is photo resistance.
In addition, additionally providing a kind of LED lamp, the LED lamp includes: above-mentioned LED constant-current control circuit.
Above-mentioned LED constant-current control circuit is sampled by electric current of the sampling unit to LED light, control chip according to
The output of sample rate current control switch unit realizes the current constant control of LED light, circuit structure letter to control the output of LED light
List, circuit loss are low, control is stablized, and improve the service life of circuit.
Detailed description of the invention
Fig. 1 is LED constant-current control circuit structural schematic diagram provided by the embodiment of the utility model；
Fig. 2 is the exemplary circuit schematic diagram of LED constant-current control circuit provided by the embodiment of the utility model.
Specific embodiment
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 shows the structural schematic diagram of the LED constant-current control circuit of the utility model preferred embodiment offer, in order to just
In explanation, only the parts related to this embodiment are shown, and details are as follows:
As depicted in figs. 1 and 2, a kind of LED light 60 has, including LED constant-current control circuit and controls electricity with the LED constant current
Road connects LED light 60.
LED constant-current control circuit includes: power module 10, sampling unit 30, control chip 20, switch unit 50 and filtering
Unit 40 is sampled by electric current of the sampling unit 30 to LED light 60, controls chip 20 according to sample rate current control switch list
The output of member 50 realizes the current constant control of LED light 60 to control the output of LED light 60.
Wherein, power module 10 is usually obtained by external 220V, 50 hertz of electric main for providing working power
Electric energy, power module 10 are specifically connect with control chip 20, on the one hand provide operating voltage for control chip 20, on the other hand,
The voltage that power module 10 exports is converted to DC voltage by control chip 20, and is exported by switch unit 50 to LED light 60,
Power supply is provided for LED light 60.
Sampling unit 30 is connect with LED light 60, for acquiring the output electric current of LED light 60, and exports sampled current signals.
Specifically, sampling unit 30 is connect with 60 output end of LED light of LED light 60, and timing detects the output electric current of LED light 60, right
Output electric current exports sampled current signals after carrying out signal processing, wherein the sampled current signals are the output with the LED light 60
The current signal or voltage signal of the proportional relationship of electric current.
Control chip 20 is connect with sampling unit 30, exports control signal according to sampled current signals, control chip 20 connects
After receiving the sampled current signals that sampling unit 30 exports, algorithm process is carried out to the sampled current signals, to obtain control letter
Number.Specifically, sampled current signals are compared with preset sampled current signals, and export difference, if sample rate current
Signal is greater than sampled current signals, then exporting control signal makes LED light 60 export electric current reduction, adopts if sampled current signals are less than
Sample current signal, then exporting control signal makes LED light 60 export electric current increase, the final constant current output for realizing LED light 60.In reality
In the algorithm process on border, it is also added into noise reduction algorithm, the algorithm specifically: the multiple differences obtained in preset time period are obtained,
The maximum value and minimum value in multiple difference are abandoned, average value processing is done to remaining difference, is finally obtained in preset time period
Multiple differences average value, according to the average value export control signal, the output of control switch unit 50.Wherein, control letter
Number be pwm signal, pass through change pwm signal duty ratio, change switch unit 50 turn-on time, to control LED light 60
Output.
The control terminal of switch unit 50 and the input terminal of switch unit 50 are connect with control chip 20, receive control letter
Number, control the output of LED light 60.Switch unit 50 is metal-oxide-semiconductor or triode, and in the present embodiment, switch unit 50 is MOS
The source electrode of pipe, metal-oxide-semiconductor is connect with an output end of control chip 20, receives the DC voltage of control chip 20, the grid of metal-oxide-semiconductor
Pole is connect by filter unit 40 with control chip 20, and control signal is received, and the drain electrode of metal-oxide-semiconductor is connect with LED light 60.
Filter unit 40 is connected between control chip 20 and switch unit 50, for being filtered place to control signal
Reason.Filter unit 40 includes first resistor and first capacitor, and first resistor is connected to the control of control chip 20 and switch unit 50
Between end processed, first capacitor is connected between the control terminal and ground of switch unit 50.
It further, further include light-sensitive device, light-sensitive device is connect with control chip 20, and light-sensitive device detects environment light letter
Number, to judge current light environment.Light-sensitive device is photo resistance, if being currently daylight environment, control chip 20 controls LED
Lamp 60 stops output, if current night time environment, control chip 20 controls LED light 60 and exports.It in a particular application, can be according to reality
The case where border, does control adjustment.
Have in conclusion the utility model embodiment provides a kind of LED light 60, including LED constant-current control circuit and
LED light 60 is connect with the LED constant-current control circuit.LED constant-current control circuit includes: power module 10, sampling unit 30, control
Chip 20, switch unit 50 and filter unit 40 are sampled by electric current of the sampling unit 30 to LED light 60, control chip
20 realize the constant current control of LED light 60 according to the output of sample rate current control switch unit 50 to control the output of LED light 60
System.Circuit structure is simple, circuit loss is low, control is stablized, and improves the service life of circuit.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of LED constant-current control circuit, which is characterized in that the LED constant-current control circuit includes:
Power module, the power module is for providing working power；
Sampling unit, the sampling unit are connect with the LED light, for acquiring the output electric current of the LED light, and are exported and are adopted
Sample current signal；
Chip is controlled, the control chip is connect with the sampling unit, exports control signal according to the sampled current signals；
The input terminal of switch unit, the control terminal of the switch unit and the switch unit is connect with the control chip,
The control signal is received, the output of the LED light is controlled；
Filter unit, the filter unit are connected between the control chip and the switch unit, for the control
Signal is filtered.
2. LED constant-current control circuit as described in claim 1, which is characterized in that the switch unit is metal-oxide-semiconductor or three poles
Pipe.
3. LED constant-current control circuit as described in claim 1, which is characterized in that the filter unit include first resistor and
First capacitor, the first resistor are connected between control chip and the control terminal of the switch unit, first electricity
Appearance is connected between the control terminal and ground of the switch unit.
4. LED constant-current control circuit as described in claim 1, which is characterized in that the control signal is pwm signal.
5. LED constant-current control circuit as described in claim 1, which is characterized in that it further include light-sensitive device, the light-sensitive device
It is connect with the control chip, the light-sensitive device detects ambient light signal, to judge current light environment.
6. LED constant-current control circuit as claimed in claim 5, which is characterized in that the light-sensitive device is photo resistance.
7. a kind of LED lamp, which is characterized in that the LED lamp includes: as LED as claimed in any one of claims 1 to 6 is permanent
Flow control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820480946.6U CN208609234U (en) | 2018-04-04 | 2018-04-04 | A kind of LED constant-current control circuit and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820480946.6U CN208609234U (en) | 2018-04-04 | 2018-04-04 | A kind of LED constant-current control circuit and LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208609234U true CN208609234U (en) | 2019-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820480946.6U Active CN208609234U (en) | 2018-04-04 | 2018-04-04 | A kind of LED constant-current control circuit and LED lamp |
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| CN (1) | CN208609234U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014903A (en) * | 2020-01-06 | 2020-04-17 | 深圳市佳士科技股份有限公司 | Anti-interference switch signal processing circuit and welding and cutting equipment |
-
2018
- 2018-04-04 CN CN201820480946.6U patent/CN208609234U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111014903A (en) * | 2020-01-06 | 2020-04-17 | 深圳市佳士科技股份有限公司 | Anti-interference switch signal processing circuit and welding and cutting equipment |
| CN111014903B (en) * | 2020-01-06 | 2024-06-04 | 深圳市佳士科技股份有限公司 | Anti-interference switch signal processing circuit and welding and cutting equipment |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 New Industrial Zone No. 1, 2, 3 and 4, Pingdi Street Center Community, Longgang District, Shenzhen City, Guangdong Province Patentee after: Jiawei New Energy Co., Ltd. Address before: 518000 New Industrial Zone No. 1, 2, 3 and 4, Pingdi Street Center Community, Longgang District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Jiawei Photovoltaic Lighting Co., Ltd. |
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| CP01 | Change in the name or title of a patent holder |