CN202178891U - Solar LED (Light-Emitting Diode) power control type constant-current source - Google Patents
Solar LED (Light-Emitting Diode) power control type constant-current source Download PDFInfo
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- CN202178891U CN202178891U CN2010206265817U CN201020626581U CN202178891U CN 202178891 U CN202178891 U CN 202178891U CN 2010206265817 U CN2010206265817 U CN 2010206265817U CN 201020626581 U CN201020626581 U CN 201020626581U CN 202178891 U CN202178891 U CN 202178891U
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- power control
- solar led
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Abstract
The utility model relates to a solar LED (Light-Emitting Diode) power control type constant-current source. The constant-current source uses a high-frequency power driving chip IC1; the working frequency is 1 MHZ; after the positive electrode of a VIN input power supply of the high-frequency power driving chip IC1 controls and executes PWM (Pulse-Width Modulation) and synchronous rectification through an N channel MOS (Metal Oxide Semiconductor) transistor with low resistance in the power driving chip, the PWM is output by an SW (Signal Wire) to an inductor L1 and a capacitor C2 and then is output to an LED lamp through filtering. With the adoption of the constant-current source, the volume is reduced, the control of a light-regulating signal is received at any time, the utilization ratio of electric energy is improved, the energy consumption is reduced, the investment is saved, and furthermore the brightness can be accurately controlled.
Description
1. technical field
The utility model is a kind of solar lighting control circuit, belongs to the photovoltaic LED power technique fields.
2. background technology
Use at present in the solar lighting technology status is:
1. LED such as solar street light and garden lamp lighting apparatus mainly is to use constant-current source, and power is fixed.
2, the operating frequency of constant-current source lower (generally being that 40KHZ is to 200KHZ) has noise, and the many volumes of peripheral circuit are bigger.
What 3, the rectification of DC/DC step-down constant flow module was generally adopted is diode, and its conversion efficiency is lower, has only 75% to 85%.
3. summary of the invention
The purpose of the utility model is accepted the control of dim signal at any time for reducing volume, improves the utilization ratio of electric energy, cuts down the consumption of energy energy efficient and investment.In addition, can accurately control brightness.
A kind of solar power control type constant-current source; Said constant-current source adopts high frequency electric source chip for driving IC1; Its operating frequency is 1MHZ, the positive pole of the VIN input power supply of high frequency electric source chip for driving IC1, the N-channel MOS pipe of the low internal resistance in the power drives chip; After PWM pulse-width modulation and synchronous rectification are carried out in control, output to the LED lamp to the C2 capacitor filtering again to the L1 inductance by SW output PWM pulse-width modulation.
Further, said constant-current source further comprises current sense resistor R6, the current output terminal that it is positioned at the LED lamp, the resistance R 1 that is connected in parallel on the LED both sides produces dividing potential drop with R2, above-mentioned dividing potential drop feed back to the FB end relatively adjustment make the output constant current.
Further, said constant-current source further comprises switching tube Q3 and timer, and when the needs normal illumination, switching tube Q3 breaks off, and the LED lamp is in the full power operation state; When the pedestrian is rare on unmanned on the late into the night road surface or the road surface, just exports high potential during timer starting time-delay control function of power, the brightness of lamp just reduces.
Further, the external hot type infrared energy-conserving of said constant-current source module, said module is just exported electronegative potential when having the people movable, and the brightness of lamp just improves, and nobody just exports high potential when movable, and the brightness of lamp just reduces.
Further, the output high potential just makes switching tube Q3 conducting when outputing to R8, through the R7 electric resistance partial pressure voltage of the COM end of ICl is reduced, and it is operated in the half-power state.
Further, the resistance of change R7 resistance just can realize the adjustment of power.
Further, the conversion efficiency of said constant-current source is up to 92%-96%.
Through adopting such scheme, the present invention has realized following advantage:
1, adopt a kind of high-efficiency high power power supply chip, its conversion efficiency is high, more energy-conservation and environmental protection.
The conversion efficiency that rectification output has improved power supply falls in 2, the built-in synchronous N-channel MOS pipe of power supply chip synchronously.The built-in chip type power MOS pipe has just reduced peripheral circuit and volume.
3, watt level can be regulated according to user's demand.
4. description of drawings
Fig. 1 is the circuit theory diagrams of the utility model embodiment
5. embodiment
For making the purpose of the utility model, technical scheme and advantage are clearer, below with reference to the accompanying drawing embodiment that develops simultaneously, to the utility model further explain.
As shown in Figure 1, the circuit diagram of the utility model has fully disclosed this novel invention spirit.
Adopt the high frequency electric source chip for driving, its operating frequency has realized the purpose of noiselessness and small size up to 1MHZ.After the N-channel MOS management and control system of the low internal resistance of positive pole in the power drives chip of the VIS input power supply of high frequency electric source chip for driving ICl is carried out PWM pulse-width modulation and synchronous rectification, output to the LED lamp to the C2 capacitor filtering again to the L1 inductance by SW output PWM pulse-width modulation.The dividing potential drop of the current detecting of R6 and R1.R2. feed back to the FB end relatively adjustment make the output constant current.When the needs normal illumination, switching tube Q3 breaks off, and the LED lamp is in the full power operation state.When the pedestrian was rare on unmanned on the late into the night road surface or the road surface, the brightness of just exporting the high potential lamp during timer starting time-delay control function of power just reduced.The brightness that module is just exported the electronegative potential lamp when also can external hot type infrared energy-conserving module having the people movable just improves, and nobody just exports high potential lamp when movable brightness just reduces.It is logical that the output high potential just makes switching tube Q3 fall when outputing to R8, through the R7 electric resistance partial pressure voltage of COM end reduced, and it is operated in the half-power state.The resistance that changes R7 resistance just can realize the adjustment of power.Its conversion efficiency is up to 92%-96%.
Because this product conversion efficiency improves greatly and has the time-delay control function of power, therefore can realize purpose of energy saving.
Advantage of the present invention is:
1, can connect the function that power falls in external timer, can also external voltage signal adjusting power (all right external hot type infrared energy-conserving module).Realize purpose of energy saving.
2,, thereby improved conversion efficiency because the N-channel MOS management and control system of the low internal resistance of employing is carried out synchronous rectification.
3, adopt the high-frequency drive chip, operating frequency is up to 1MHZ, and its noiselessness, volume are little.
The said device of the utility model not only can be used for the solar LED constant-current source; Also can be used to the place that other can be suitable for, should be pointed out that the above only is the preferred implementation method of the utility model; For the person of ordinary skill of the art; Under the prerequisite that does not break away from the utility model principle, can also make some improvement and variation, these improvement and variation also should be regarded as the protection range of the utility model.
Claims (7)
1. solar LED power control type constant-current source; It is characterized in that: said constant-current source adopts high frequency electric source chip for driving IC1; Its operating frequency is 1MHZ, the positive pole of the VIN input power supply of high frequency electric source chip for driving IC1, the N-channel MOS pipe of the low internal resistance in the power drives chip; After PWM pulse-width modulation and synchronous rectification are carried out in control, output to the LED lamp to the C2 capacitor filtering again to the L1 inductance by SW output PWM pulse-width modulation.
2. solar LED power control type constant-current source as claimed in claim 1; It is characterized in that: said constant-current source further comprises current sense resistor R6's; It is positioned at the current output terminal of LED lamp; The resistance R 1 that is connected in parallel on the LED both sides produces dividing potential drop with R2, above-mentioned dividing potential drop feed back to the FB end relatively adjustment make the output constant current.
3. solar LED power control type constant-current source as claimed in claim 2, it is characterized in that: said constant-current source further comprises switching tube Q3 and timer, and when the needs normal illumination, switching tube Q3 breaks off, and the LED lamp is in the full power operation state; When the pedestrian is rare on unmanned on the late into the night road surface or the road surface, just exports high potential during timer starting time-delay control function of power, the brightness of lamp just reduces.
4. solar LED power control type constant-current source as claimed in claim 3; It is characterized in that: the external hot type infrared energy-conserving of said constant-current source module, said module is just exported electronegative potential when having the people movable, and the brightness of lamp just improves; Nobody just exports high potential when movable, the brightness of lamp just reduces.
5. solar LED power control type constant-current source as claimed in claim 4 is characterized in that: the output high potential just makes switching tube Q3 conducting when outputing to R8, through the R7 electric resistance partial pressure voltage of the COM end of IC1 is reduced, and it is operated in the half-power state.
6. solar LED power control type constant-current source as claimed in claim 5 is characterized in that: the resistance that changes R7 resistance just can realize the adjustment of power.
7. solar LED power control type constant-current source as claimed in claim 6, it is characterized in that: the conversion efficiency of said constant-current source is up to 92%-96%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265817U CN202178891U (en) | 2010-11-26 | 2010-11-26 | Solar LED (Light-Emitting Diode) power control type constant-current source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206265817U CN202178891U (en) | 2010-11-26 | 2010-11-26 | Solar LED (Light-Emitting Diode) power control type constant-current source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202178891U true CN202178891U (en) | 2012-03-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206265817U Expired - Fee Related CN202178891U (en) | 2010-11-26 | 2010-11-26 | Solar LED (Light-Emitting Diode) power control type constant-current source |
Country Status (1)
| Country | Link |
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| CN (1) | CN202178891U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111210782A (en) * | 2020-03-10 | 2020-05-29 | 上海闻泰电子科技有限公司 | Synchronous rectification backlight driving circuit, electronic equipment and method |
-
2010
- 2010-11-26 CN CN2010206265817U patent/CN202178891U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111210782A (en) * | 2020-03-10 | 2020-05-29 | 上海闻泰电子科技有限公司 | Synchronous rectification backlight driving circuit, electronic equipment and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120328 Termination date: 20121126 |