CN205320331U - Light source drive circuit of vegetation lamp - Google Patents
Light source drive circuit of vegetation lamp Download PDFInfo
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- CN205320331U CN205320331U CN201521143633.4U CN201521143633U CN205320331U CN 205320331 U CN205320331 U CN 205320331U CN 201521143633 U CN201521143633 U CN 201521143633U CN 205320331 U CN205320331 U CN 205320331U
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Abstract
Light source drive circuit of vegetation lamp, it includes MCU, constant current control ware U5, sampling resistor rcs, diode D6, electronic switch Q1 and inductance L1, constant current control ware U5's data input end DIM is connected to MCU's output, and constant current control ware U5's collection end CSN connects LED light source module's positive pole, still connects sampling resistor rcs's one end, and diode D6's negative pole is connected to sampling resistor rcs's the other end, and a DC power supply DC is still connected to diode D6's negative pole, and diode D6's positive pole passes through the negative pole that inductance L1 connects LED light source module, constant current control ware U5's drive end DRV is connected to electronic switch Q1's control end, and diode D6's positive pole, electronic switch Q1's output ground connection is connected to electronic switch Q1's input. The utility model discloses can realize constant current drive to the LED light source module of vegetation lamp, and regulation drive current's that can be convenient size to and the luminance of regulation light source, the circuit is simple, and is with low costs.
Description
Technical field
The utility model relates to the light source driving circuit of a kind of plant growth lamp.
Background technology
The indoor plant flowers one of the main reasons that growing way is more and more poorer along with the time is the irradiation lacking light, irradiated by the LED of spectrum needed for applicable plant, i.e. plant growth lamp, it is possible not only to promote that it grows, but also can kind of blooming period prolonging, it is to increase the quality of flower. And this kind of high efficiency light source system is applied in the agriculture productions such as the facility such as booth, greenhouse, the drawback that sunshine, deficiency caused the booth vegetable mouthfeel such as tomato, cucumber to decline can be solved on the one hand, can also make on the other hand winter booth solanaceous vegetables advance to the Spring Festival before and after listing, thus reach the object that anti-season is cultivated.
Existing plant growth lamp adopts common driving mechanism, cannot realize constant-current driving, causes the job insecurity of plant growth lamp, and can not regulate brightness as required, and application is comparatively limited to.
Practical novel content
For the deficiencies in the prior art, the utility model is intended to provide the light source driving circuit of a kind of plant growth lamp solved the problems of the technologies described above.
For achieving the above object, the utility model adopts following technical scheme:
A light source driving circuit for plant growth lamp, it comprises MCU, constant-current controller U5, sampling resistance Rcs, diode D6, electronic switch Q1 and inductance L 1;
The output terminal of MCU connects the data input terminus DIM of constant-current controller U5, the collection terminal CSN of constant-current controller U5 connects the positive pole of LED light source module, also connect one end of sampling resistance Rcs, the other end of sampling resistance Rcs connects the negative electrode of diode D6, the negative electrode of diode D6 also connects a direct supply DC, and the anode of diode D6 connects the negative pole of LED light source module by inductance L 1; The control end of electronic switch Q1 connects the drive end DRV of constant-current controller U5, and the input terminus of electronic switch Q1 connects the anode of diode D6, the output head grounding of electronic switch Q1;
MCU is for exporting a pwm signal to constant-current controller U5, and when constant-current controller U5 receives the high level of pwm signal, constant-current controller exports the first level signal to electronic switch Q1, so that electronic switch Q1 conducting; Constant-current controller U5 detects the voltage of sampling resistance Rcs in real time, and voltage and the predetermined voltage threshold of sampling resistance Rcs are compared, when the voltage of the resistance Rcs that samples is less than voltage threshold value, keep exporting the first level signal to electronic switch Q1, when the voltage of the resistance Rcs that samples is greater than voltage threshold value, export second electrical level signal to electronic switch Q1 so that electronic switch Q1 closes; When constant-current controller U5 receives the lower level of pwm signal, constant-current controller U5 keeps exporting second electrical level signal to electronic switch Q1.
Preferably, this electronic switch Q1 is field effect transistor, and the control end of electronic switch Q1, input terminus and output terminal are respectively the grid of field effect transistor, drain electrode and source electrode.
Preferably, diode D6 is Schottky barrier diodes.
Preferably, diode D6 is the Schottky barrier diodes of SS54 model.
Preferably, light source driving circuit also comprises filter capacitor C1, and direct supply DC is also by filter capacitor C1 ground connection.
Preferably, this constant-current controller U5 is the current constant control chip of PT4121 model.
The beneficial effects of the utility model are at least as follows:
The LED light source module of plant growth lamp can be realized constant-current driving by the utility model, and can regulate the size driving electric current easily, and regulates the brightness of light source, and circuit is simple, and cost is low.
Accompanying drawing explanation
Fig. 1 is the schematic circuit of the better embodiment of the light source driving circuit of the utility model plant growth lamp.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further:
Referring to Fig. 1, the utility model relates to the light source driving circuit of a kind of plant growth lamp, and its better embodiment comprises MCU, constant-current controller U5, sampling resistance Rcs, diode D6, electronic switch Q1 and inductance L 1.
The output terminal of MCU connects the data input terminus DIM of constant-current controller U5, the collection terminal CSN of constant-current controller U5 connects the positive pole of LED light source module 10, also connect one end of sampling resistance Rcs, the other end of sampling resistance Rcs connects the negative electrode of diode D6, the negative electrode of diode D6 also connects a direct supply DC, and the anode of diode D6 connects the negative pole of LED light source module by inductance L 1; The control end of electronic switch Q1 connects the drive end DRV of constant-current controller U5, and the input terminus of electronic switch Q1 connects the anode of diode D6, the output head grounding of electronic switch Q1.
MCU is for exporting a pwm signal to constant-current controller U5, when constant-current controller U5 receives the high level of pwm signal, constant-current controller exports the first level signal if high level signal is to electronic switch Q1, so that electronic switch Q1 conducting, now, direct supply DC, sampling resistance Rcs, LED light source module 10, inductance L 1 and electronic switch Q1 form the first current circuit, LED light source module 10 is driven to work, in this process, due to the effect of inductance L 1, the electric current in loop increases gradually, constant-current controller U5 detects the voltage of sampling resistance Rcs in real time, and voltage and the predetermined voltage threshold of sampling resistance Rcs are compared, when the voltage of the resistance Rcs that samples is less than voltage threshold value, keep exporting the first level signal to electronic switch Q1, when the voltage of the resistance Rcs that samples is greater than voltage threshold value, export second electrical level signal if low level signal is to electronic switch Q1, electronic switch Q1 is closed, now, direct current DC, sampling resistance Rcs, LED light source module 10, inductance L 1 and diode D6 form the 2nd current circuit, due to the effect of inductance L 1, the electric current of the 2nd current circuit reduces gradually, the voltage of sampling resistance Rcs is made to be gradually reduced to below voltage threshold value, then constant-current controller U5 exports the first level signal again, so repeatedly, realize mean current constant, with constant-current driving LED light source module.The resistance of sampling resistance Rcs realizes by regulating to drive the size of electric current.
When constant-current controller U5 receives the lower level of pwm signal, constant-current controller U5 keeps exporting second electrical level signal to electronic switch Q1 so that drive electric current to be zero. By changing the brightness of the adjustable LED of dutycycle of pwm signal.
Preferably, this electronic switch Q1 is field effect transistor, and the control end of electronic switch Q1, input terminus and output terminal are respectively the grid of field effect transistor, drain electrode and source electrode.
Preferably, diode D6 is Schottky barrier diodes.
Preferably, diode D6 is the Schottky barrier diodes of SS54 model.
Preferably, light source driving circuit also comprises filter capacitor C1, and direct supply DC is also by filter capacitor C1 ground connection.
Preferably, this constant-current controller U5 is the current constant control chip of PT4121 model.
For a person skilled in the art, according to technical scheme described above and design, other various corresponding change and distortion can be made, and all these change and are out of shape within the protection domain that all should belong to the utility model claim.
Claims (6)
1. the light source driving circuit of a plant growth lamp, it is characterised in that: it comprises MCU, constant-current controller U5, sampling resistance Rcs, diode D6, electronic switch Q1 and inductance L 1;
The output terminal of MCU connects the data input terminus DIM of constant-current controller U5, the collection terminal CSN of constant-current controller U5 connects the positive pole of LED light source module, also connect one end of sampling resistance Rcs, the other end of sampling resistance Rcs connects the negative electrode of diode D6, the negative electrode of diode D6 also connects a direct supply DC, and the anode of diode D6 connects the negative pole of LED light source module by inductance L 1; The control end of electronic switch Q1 connects the drive end DRV of constant-current controller U5, and the input terminus of electronic switch Q1 connects the anode of diode D6, the output head grounding of electronic switch Q1;
MCU is for exporting a pwm signal to constant-current controller U5, and when constant-current controller U5 receives the high level of pwm signal, constant-current controller exports the first level signal to electronic switch Q1, so that electronic switch Q1 conducting; Constant-current controller U5 detects the voltage of sampling resistance Rcs in real time, and voltage and the predetermined voltage threshold of sampling resistance Rcs are compared, when the voltage of the resistance Rcs that samples is less than voltage threshold value, keep exporting the first level signal to electronic switch Q1, when the voltage of the resistance Rcs that samples is greater than voltage threshold value, export second electrical level signal to electronic switch Q1 so that electronic switch Q1 closes; When constant-current controller U5 receives the lower level of pwm signal, constant-current controller U5 keeps exporting second electrical level signal to electronic switch Q1.
2. the light source driving circuit of plant growth lamp as claimed in claim 1, it is characterised in that: this electronic switch Q1 is field effect transistor, and the control end of electronic switch Q1, input terminus and output terminal are respectively the grid of field effect transistor, drain electrode and source electrode.
3. the light source driving circuit of plant growth lamp as claimed in claim 1, it is characterised in that: diode D6 is Schottky barrier diodes.
4. the light source driving circuit of plant growth lamp as claimed in claim 3, it is characterised in that: diode D6 is the Schottky barrier diodes of SS54 model.
5. the light source driving circuit of plant growth lamp as claimed in claim 1, it is characterised in that: light source driving circuit also comprises filter capacitor C1, and direct supply DC is also by filter capacitor C1 ground connection.
6. the light source driving circuit of plant growth lamp as claimed in claim 1, it is characterised in that: this constant-current controller U5 is the current constant control chip of PT4121 model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521143633.4U CN205320331U (en) | 2015-12-31 | 2015-12-31 | Light source drive circuit of vegetation lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521143633.4U CN205320331U (en) | 2015-12-31 | 2015-12-31 | Light source drive circuit of vegetation lamp |
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| Publication Number | Publication Date |
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| CN205320331U true CN205320331U (en) | 2016-06-15 |
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| CN201521143633.4U Active CN205320331U (en) | 2015-12-31 | 2015-12-31 | Light source drive circuit of vegetation lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491725A (en) * | 2015-12-31 | 2016-04-13 | 广州达森灯光股份有限公司 | Light source drive circuit for plant growth lamp |
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2015
- 2015-12-31 CN CN201521143633.4U patent/CN205320331U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105491725A (en) * | 2015-12-31 | 2016-04-13 | 广州达森灯光股份有限公司 | Light source drive circuit for plant growth lamp |
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