CN204578829U - A kind ofly utilize solar powered multipath LED drive circuit - Google Patents
A kind ofly utilize solar powered multipath LED drive circuit Download PDFInfo
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- CN204578829U CN204578829U CN201520224411.9U CN201520224411U CN204578829U CN 204578829 U CN204578829 U CN 204578829U CN 201520224411 U CN201520224411 U CN 201520224411U CN 204578829 U CN204578829 U CN 204578829U
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Abstract
The utility model discloses and a kind ofly utilize solar powered multipath LED drive circuit, comprise the solar panel and DC/DC converter that connect successively, described DC/DC converter output terminal connects the LED strip that the some LED of multirouting are composed in series respectively; Described multipath LED drive circuit also comprises PWM dimming controlling module, and described PWM dimming controlling module exports the electric current controlling each paths of LEDs string.Each paths of LEDs string is jointly by a sampling resistor ground connection, and described sampling resistor connects and compares amplifying circuit, compares amplification circuit output end and connects PWM dimming controlling module by filter circuit.Provided by the utility modelly utilize solar powered multipath LED drive circuit, for providing required drive current for LED multi-path string, utilize the range of operation of Driven by Solar Energy, drive circuit wide, each branch road driving current constant, it is little that electric current distributes uneven degree, and system effectiveness is high and possess solar panel MPPT maximum power point tracking and energy storage battery charging controls.
Description
Technical field
The utility model relates to LED illumination, particularly a kind ofly utilizes solar powered multipath LED drive circuit.
Background technology
The Green Lighting Project of energy-efficient, environmental protection, safety and comfort not only can improve illumination economic benefit, and reduces noxious gas emission.Light-emitting diode (LED), as a kind of semiconducting solid luminescent device, has that the life-span is long, volume is little, energy-conserving and environment-protective and a feature such as numeral regulation and control are convenient.LED often adopts series parallel structure to reach the illumination requirement of the application scenario such as street lamp or back lighting.Due to factors such as manufacturing process, single led voltage-current characteristic there are differences, and therefore causes electric current between parallel connection LED string to there is bigger difference.Therefore, the current balance problem between each string LED in series parallel structure must be solved.
The way of current solution current balance problem mainly detects every branch current and feeds back to prime DC/DC converter, but realization is complicated, loss is comparatively large, power-efficient is not high, and multichannel light modulation simultaneously difficulty, and current balance error is larger.
Utility model content
For overcoming the shortcomings and deficiencies of above-mentioned prior art, the utility model provides a kind of and utilizes solar powered multipath LED drive circuit.
The technical solution of the utility model is:
Utilize a solar powered multipath LED drive circuit, comprise the solar panel and DC/DC converter that connect successively, described DC/DC converter output terminal connects the LED strip that the some LED of multirouting are composed in series respectively; Described multipath LED drive circuit also comprises PWM dimming controlling module, and described PWM dimming controlling module exports the electric current controlling each paths of LEDs string.
Preferably, each paths of LEDs string is jointly by a sampling resistor ground connection, and described sampling resistor connects and compares amplifying circuit, compares amplification circuit output end and connects PWM dimming controlling module by filter circuit.
Preferably, each paths of LEDs string also to be connected a field effect transistor, described PWM dimming controlling module connects a phase shifting control module, and described phase shifting control module comprises multi-way control signals output, the field effect transistor that multi-way control signals output respectively the every paths of LEDs string of connection control is connected.
Preferably, the junction of each paths of LEDs string and DC/DC converter output terminal is also connected with filter capacitor, each filter capacitor is by series connection field effect transistor ground connection, and the multi-way control signals output of described phase shifting control module is the connection control field effect transistor of connecting with filter capacitor respectively.
Preferably, described DC/DC converter comprises a DC/DC converter and the 2nd DC/DC converter, described solar panel exports connection the one DC/DC converter, one DC/DC converter exports and connects storage battery, for charge in batteries, storage battery connects the 2nd DC/DC converter, and the 2nd DC/DC converter exports the LED strip connecting the some LED of multirouting and be composed in series.
Preferably, a described DC/DC converter is also connected with MPPT maximum power point tracking module, controlling a DC/DC converter is charge in batteries.
Preferred further, two field effect transistor on same paths of LEDs string adopt the same road control signal output connection control of phase shifting control module.
The utility model has the advantages that:
Provided by the utility modelly utilize solar powered multipath LED drive circuit, for providing required drive current for LED multi-path string, utilize the range of operation of Driven by Solar Energy, drive circuit wide, each branch road driving current constant, it is little that electric current distributes uneven degree, and system effectiveness is high and possess solar panel MPPT maximum power point tracking and energy storage battery charging controls.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further described:
Fig. 1 described in the utility modelly utilizes solar powered multipath LED drive circuit;
The multiplex pulse signal that Fig. 2 is the described phase shifting control module of the utility model exports schematic diagram.
Embodiment
embodiment:
As shown in Figure 1, what the utility model disclosed utilizes solar powered multipath LED drive circuit, comprise the solar panel connected successively, one DC/DC converter and storage battery, a described DC/DC converter is also connected with MPPT maximum power point tracking module, make a DC/DC converter all the time Maximum Power Output be charge in batteries, described storage battery connects the 2nd DC/DC converter, 2nd DC/DC converter output terminal connects the anode of the LED strip that the some LED of multirouting are composed in series respectively, the negative electrode of each paths of LEDs string is jointly by a sampling resistor Rs ground connection, described sampling resistor Rs connects and compares amplifying circuit, relatively amplification circuit output end connects PWM dimming controlling module by filter circuit.
The cathode terminal of each paths of LEDs string is respectively connected a field effect transistor Q1, anode tap is connected with filter capacitor C1, each filter capacitor is by series connection field effect transistor Q2 ground connection, described PWM dimming controlling module connects a phase shifting control module, described phase shifting control module comprises multi-way control signals output, field effect transistor Q1 on the every paths of LEDs string of multi-way control signals output difference connection control and Q2, two field effect transistor on same paths of LEDs string adopt the same road control signal output connection control of phase shifting control modules.
The utility model is applied to lights LED array by the condition of work of wide range of exposures.Solar panel, a DC/DC converter and maximal power tracing module realize solar panel maximal power tracing and charge in batteries management.Wherein solar panel is charge in batteries by a DC/DC converter, one DC/DC converter sample solar panel output voltage and electric current, maximum power output is realized under maximal power tracing module controls, monitor accumulator cell charging and discharging electric current to avoid accumulator super-charge simultaneously, improve the life of storage battery.
Storage battery is connected with the 2nd DC/DC converter, and the output of the 2nd DC/DC converter connects LED multi-path string, exports constant current and lights LED strip; Total output current is sampled by sampling resistor Rs, sampling exports by comparing amplifying circuit and feeding back to PWM dimming controlling module through filter circuit, PWM light-adjusting module exports the pulse of different duty according to feedback result, what export each paths of LEDs string opens pulse simultaneously, opens pulse passages through which vital energy circulates detrusion phase control module generation pulse as shown in Figure 2 and lights each paths of LEDs load to circulate respectively.
Provided by the utility modelly utilize solar powered multipath LED drive circuit, for providing required drive current for LED multi-path string, utilize the range of operation of Driven by Solar Energy, drive circuit wide, each branch road driving current constant, it is little that electric current distributes uneven degree, and system effectiveness is high and possess solar panel MPPT maximum power point tracking and energy storage battery charging controls.
Above-described embodiment, only for technical conceive of the present utility model and feature are described, its object is to person skilled in the art can be understood content of the present utility model and implement according to this, can not limit protection range of the present utility model with this.All modifications done according to the Spirit Essence of the utility model main technical schemes, all should be encompassed within protection range of the present utility model.
Claims (7)
1. utilize a solar powered multipath LED drive circuit, it is characterized in that: comprise the solar panel and DC/DC converter that connect successively, described DC/DC converter output terminal connects the LED strip that the some LED of multirouting are composed in series respectively; Described multipath LED drive circuit also comprises PWM dimming controlling module, and described PWM dimming controlling module exports the electric current controlling each paths of LEDs string.
2. according to claim 1ly utilize solar powered multipath LED drive circuit, it is characterized in that: each paths of LEDs string is jointly by a sampling resistor ground connection, described sampling resistor connects and compares amplifying circuit, compares amplification circuit output end and connects PWM dimming controlling module by filter circuit.
3. according to claim 2ly utilize solar powered multipath LED drive circuit, it is characterized in that: a field effect transistor that each paths of LEDs string is also connected, described PWM dimming controlling module connects a phase shifting control module, described phase shifting control module comprises multi-way control signals output, the field effect transistor that multi-way control signals output respectively the every paths of LEDs string of connection control is connected.
4. according to claim 3ly utilize solar powered multipath LED drive circuit, it is characterized in that: the junction of each paths of LEDs string and DC/DC converter output terminal is also connected with filter capacitor, each filter capacitor is by series connection field effect transistor ground connection, and the multi-way control signals output of described phase shifting control module is the connection control field effect transistor of connecting with filter capacitor respectively.
5. according to claim 1ly utilize solar powered multipath LED drive circuit, it is characterized in that: described DC/DC converter comprises a DC/DC converter and the 2nd DC/DC converter, described solar panel exports connection the one DC/DC converter, one DC/DC converter exports and connects storage battery, for charge in batteries, storage battery connects the 2nd DC/DC converter, and the 2nd DC/DC converter exports the LED strip connecting the some LED of multirouting and be composed in series.
6. according to claim 5ly utilize solar powered multipath LED drive circuit, it is characterized in that: a described DC/DC converter is also connected with MPPT maximum power point tracking module, controlling a DC/DC converter is charge in batteries.
7. according to claim 4ly utilize solar powered multipath LED drive circuit, it is characterized in that: two field effect transistor on same paths of LEDs string adopt the same road control signal output connection control of phase shifting control modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224411.9U CN204578829U (en) | 2015-04-15 | 2015-04-15 | A kind ofly utilize solar powered multipath LED drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520224411.9U CN204578829U (en) | 2015-04-15 | 2015-04-15 | A kind ofly utilize solar powered multipath LED drive circuit |
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| Publication Number | Publication Date |
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| CN204578829U true CN204578829U (en) | 2015-08-19 |
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| CN201520224411.9U Active CN204578829U (en) | 2015-04-15 | 2015-04-15 | A kind ofly utilize solar powered multipath LED drive circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754838A (en) * | 2015-04-15 | 2015-07-01 | 西交利物浦大学 | Multi-path LED drive circuit using solar energy to supply power |
| CN106304489A (en) * | 2016-08-25 | 2017-01-04 | 安徽朗越能源股份有限公司 | A kind of energy-conservation lithium electricity type solar street light intelligence control system |
-
2015
- 2015-04-15 CN CN201520224411.9U patent/CN204578829U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104754838A (en) * | 2015-04-15 | 2015-07-01 | 西交利物浦大学 | Multi-path LED drive circuit using solar energy to supply power |
| CN106304489A (en) * | 2016-08-25 | 2017-01-04 | 安徽朗越能源股份有限公司 | A kind of energy-conservation lithium electricity type solar street light intelligence control system |
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