CN101026917B - Solar LED lamp circuit - Google Patents
Solar LED lamp circuit Download PDFInfo
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- CN101026917B CN101026917B CN2006100241234A CN200610024123A CN101026917B CN 101026917 B CN101026917 B CN 101026917B CN 2006100241234 A CN2006100241234 A CN 2006100241234A CN 200610024123 A CN200610024123 A CN 200610024123A CN 101026917 B CN101026917 B CN 101026917B
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- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 239000003381 stabilizer Substances 0.000 claims abstract description 4
- 229910003307 Ni-Cd Inorganic materials 0.000 abstract description 3
- 229910018095 Ni-MH Inorganic materials 0.000 abstract description 3
- 229910018477 Ni—MH Inorganic materials 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000017105 transposition Effects 0.000 description 1
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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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- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
A solar LED lamp circuit comprises a solar battery, a charging circuit, a rechargeable battery, a plurality of LEDs, a high-efficiency LED driving circuit, a unique sunlight detection control circuit and a battery over-discharge protection circuit. The LED driving circuit takes an advanced pulse frequency modulation direct current-direct current boosting voltage stabilizer as a core, and forms a circuit with a constant current driving LED by skillfully combining peripheral discrete devices. The sunlight detection control circuit and the battery over-discharge protection circuit are circuits which can control the switch by light and can protect the battery. Due to the adoption of the technical scheme, the invention meets the application of a single Ni-Cd or Ni-MH rechargeable battery to a super capacitor on one hand, and also enables the brightness of the driven LED to be optimal and the working time of the battery to be optimal on the other hand. Therefore, the invention has the characteristics of compact circuit, extremely low consumption, complete functions, high efficiency and low price.
Description
Technical field
The present invention relates to the open-air lighting device that uses in a kind of field, refer in particular to the circuit of solar LED (light-emitting diode) lamp, it belongs to the Application of Solar Energy category.
Background technology
Solar LED (Light Emitting Diode) lamp is a kind of environmental type lighting source that need not to come through traditional power supply unit work, and it is applicable to family's garden, public place, pasture, grassland, geological prospecting part, field work group, whistle, national defence limit or the like, and those lack the not convenient place of perhaps electric power supply of electric power.
Yet how to accomplish that function is complete, price Lian Ze is the main contents that the insider studies always.
Summary of the invention
The object of the present invention is to provide a kind of multiple functional, efficient and cheap solar LED lamp circuit.
A kind of solar LED lamp circuit provided by the present invention; Comprise solar cell, rechargeable battery, charging circuit and several LED; It is characterized in that: further comprising sunlight detection control circuit and battery over-discharge protection circuit, led drive circuit; Wherein: described solar cell one road is connected to charging circuit, and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit; Described charging circuit one road is connected to rechargeable battery, and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit and led drive circuit; The output that described sunlight detects control circuit and battery over-discharge protection circuit is connected to led drive circuit; The output of described led drive circuit is received LED; Said led drive circuit 3 adopts pulse frequency modulated DC-DC voltage boosting pressurizer IC as control circuit; Said pulse frequency modulated DC-DC voltage boosting pressurizer IC is when detecting LED that said output connects and big electric current occurs, and starting impulse frequency modulation(FM) mode of operation is to reduce the output current of said output.
In above-mentioned solar LED lamp circuit; Led drive circuit is the circuit with constant-current driving LED that combines peripheral discrete devices inductance L, diode D3, capacitor C and resistance R 3 to constitute with pulse frequency modulated DC-DC voltage boosting pressurizer IC; Wherein: an end of inductance L connects the positive pole of rechargeable battery 5, and the other end connects Lx switching tube output, the positive pole of diode D3 and the positive pole of LED of pulse frequency modulated DC-DC voltage boosting pressurizer IC; The Vout of the negative pole connection pulse frequency modulated DC-DC voltage boosting pressurizer IC of diode D3 boosts and exports an end of test side and capacitor C; The other end of capacitor C connects an end of resistance R 3 and the negative pole of LED; The other end of resistance R 3 is connected to the GND earth terminal of pulse frequency modulated DC-DC voltage boosting pressurizer IC and the negative pole of rechargeable battery 5; Pulse frequency modulated DC-DC voltage boosting pressurizer IC has CE chip controls end.
In above-mentioned solar LED lamp circuit, led drive circuit has adopted the pulsed drive mode.
In above-mentioned solar LED lamp circuit, sunlight detects control circuit and the battery over-discharge protection circuit is made up of transistor T, resistance R 2, diode D2 and current-limiting resistance R1, and wherein: the emitter of transistor T connects the positive pole of rechargeable battery; Collector electrode connects an end of resistance R 2 and the CE chip controls end of pulse frequency modulated DC-DC voltage boosting pressurizer IC; The other end of resistance R 2 connects the negative pole of rechargeable battery; The base stage of transistor T connects the positive pole of diode D2; The negative pole of diode connects the end of current-limiting resistance R1, and the other end of current-limiting resistance R1 connects the positive pole of solar cell.
In above-mentioned solar LED lamp circuit, the PN junction number of diode D2 satisfies calculating formula: (the round as a result of the total rechargeable battery cut-ff voltage of circuit-0.5V)/0.5V.
In above-mentioned solar LED lamp circuit, diode D2 is and the corresponding voltage-stabiliser tube of magnitude of voltage.
In above-mentioned solar LED lamp circuit, between the collector electrode of resistance R 2 and transistor T, also connect a resistance R 4.
In above-mentioned solar LED lamp circuit, between the positive pole of the emitter of transistor T and rechargeable battery, also be connected a resistance R 4.
Because led drive circuit of the present invention has adopted advanced pulse frequency modulated DC-DC voltage boosting pressurizer as control circuit; And constituted circuit through ingenious combination peripheral discrete devices with constant-current driving LED, and sunlight to detect control circuit and battery over-discharge protection circuit be the circuit that can light-operated switch can protect battery again.The application of ultracapacitor so one aspect of the present invention has satisfied single-unit Ni-Cd or Ni-MH rechargeable battery also makes the LED brightness of driving reach best on the other hand, and the operating time of battery reaches best.Therefore, the present invention has had the advantages that circuit is compact, consumption is extremely low, multiple functional, efficient and cheap.
Description of drawings
Fig. 1 is the functional block diagram of solar LED lamp circuit of the present invention;
Fig. 2 is the electrical schematic diagram of solar LED lamp circuit of the present invention.
Embodiment
As shown in Figure 1; The circuit structure of solar LED (Light Emitting Diode) lamp of the present invention; Divide from circuit function; Except solar cell 4, rechargeable battery 5 and LED, this circuit mainly is made up of following three partial circuits, and promptly charging circuit 1, led drive circuit 3 and sunlight detect control circuit and battery over-discharge protection circuit 2.Wherein:
Solar cell 4 one road is connected to charging circuit 1, and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit 2; Charging circuit 1 one road is connected to rechargeable battery 5, and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit 2 and led drive circuit 3; Sunlight detects control circuit and battery over-discharge protection circuit 2 is connected to led drive circuit 3; Led drive circuit 3 outputs to LED.
Referring to Fig. 2, charging circuit 1 has adopted a low-loss diode D1, and its positive pole is connected to the positive pole of solar cell S, and negative pole is connected to the positive pole of rechargeable battery BT; The negative pole of solar cell S links to each other with the negative pole of rechargeable battery BT.Because Ni-Cd and Ni-MH rechargeable battery all have the anti-over-charging electricity, so this circuit does not need to add in addition the additives for overcharge protection circuit.
Led drive circuit 3 has adopted the controller of PFM STEP-UP DC/DC CONVERTER (pulse frequency modulated DC-DC voltage boosting pressurizer) (being designated hereinafter simply as PFM DC/DC boost-voltage regulator) the IC BL8530 of company of Shanghai Belling production as driving LED; Since this IC built-in power transistor, expand stream so this circuit periphery need not to add power transistor in addition.Formed function through combining peripheral discrete devices inductance L, diode D3, capacitor C and resistance R 3 etc. with constant-current driving LED.
One end of inductance L connects anode, and the other end connects the Lx end of IC, the positive pole of diode D3 and the positive pole of LED; The negative pole of diode D3 connects the Vout end of IC, an end of capacitor C; The other end of capacitor C connects an end of resistance R 3 and the negative pole of LED; The other end of resistance R 3 is connected to GND end and the GND of IC; The CE of IC end is the chip opening end, during high level for opening.
When circuit start is worked, storing the required energy that boosts on the inductance L, capacitor C is storing the needed voltage of IC operate as normal, and 3 of resistance R to be current limliting use is overcurrent feedback usefulness.The excessive phenomenon of electric current appears in the LED that supposes output; This current signal must produce higher feedback voltage on R3; Because the voltage on the capacitor C can not change moment, must be higher than original Vout voltage so the voltage of R3 adds the voltage of capacitor C, so just caused that the IC internal circuit can detect output and have big electric current to occur; The IC internal control circuit will start PFM (pulse frequency modulated) mode of operation at once this moment, and output current is lowered.
In order to improve the luminous efficiency of LED; This led drive circuit has adopted the pulsed drive mode; This mode has eliminated that big electric current under general constant current form or the constant voltage form in the DC driven mode must pass through Schottky diode and the pressure drop that produces; Therefore greatly reduce the loss of entire circuit, improved the efficient of complete machine.
Owing to adopted the pulsed drive mode; So this circuit greatly reduces the coherence request of its forward conduction voltage drop of LED that parallel connection is used; The output of this circuit can directly drive the inconsistent same model LED of forward conduction voltage drop of a plurality of parallel connections, and does not need in each LED loop, to be connected in series flows resistance.
Sunlight detects control circuit and battery over-discharge protection circuit 2, is actually a circuit that unites two into one.The emitter of transistor T connects the positive pole of battery; Collector electrode connects an end of resistance R 4; The other end of R4 connects resistance R 2, connects the CE end of IC then; The other end of resistance R 2 connects the negative pole of battery; The base stage b of transistor T connects the positive pole of diode D2; The negative pole of diode connects an end of resistance R 1; The other end of resistance R 1 connects the positive pole of solar cell.
It is to be noted that diode D2 is not necessarily single PN junction, when rechargeable battery was single-unit, diode D2 was a PN junction; When rechargeable battery was binodal or more piece, diode D2 was a plurality of PN junctions; Its relationship is:
The PN junction number of D2=(round after the total rechargeable battery cut-ff voltage of circuit-0.5V)/0.5V result of calculation rounds up.
Here, diode D2 can be the corresponding voltage-stabiliser tube of magnitude of voltage.
Principle of the present invention is: daytime; When The sun came up comes; Voltage on the solar cell S rises gradually, owing to transistor T, diode D2 and resistance R 1 current in loop sharply descend, thereby causes the collector current of transistor T to become very little; So the pressure drop on the resistance R 2 is very low, at this moment IC crosses low being closed because of the CE terminal voltage.At dusk; The sun sets, and the voltage on the solar cell S descends gradually, when having dropped to transistor T, diode D2 and resistance R 1 current in loop and increase fast; Because it is big that the collector current of transistor T becomes; So the voltage on resistance R 2 uprises, at this moment IC is unlocked because of the CE terminal voltage raises, and the LED lamp is lighted this moment.
At night, along with LED lights work, the voltage on the rechargeable battery BT will slowly descend thereupon; When cell voltage is discharged to 1V (is 0.8V for ultracapacitor); Because the effect of PN junction, the Ib electric current of transistor T will descend fast, thereby cause transistor T to end; IC is quit work, so rechargeable battery BT just can be by overdischarge.
Also can be in practical application with the location swap of diode D2 and resistance R 1, its effect can not be changed.
In addition, circuit shown in Figure 2 also is feasible through some conversion, and such as resistance of adjunction between the emitter of transistor T and anode, its circuit function can not be changed; Also can be omitted under the not really high situation of complete machine performance requirement such as resistance R 4 again, perhaps also can be with between the emitter of resistance R 4 transposition access transistor T and the anode or the like.
In order to reduce the peripheral components of this circuit, also in order further to reduce the cost of complete machine, the exploitation application-specific integrated circuit (ASIC) is possible simultaneously.Wherein can be with resistance R 1, R2, R4; Diode D2, D3; Devices such as transistor T and PFM DC/DC boost-voltage regulator IC integrate; Perhaps also can a part of peripheral components and PFM DC/DC boost-voltage regulator IC be integrated, become a specialized application in the ASIC of solar LED (Light Emitting Diode) lamp (integrated circuit of special-purpose).
The exploitation dedicated devices also is possible.Both can diode D2 and transistor T be integrated, constitute new functional form transistor.
More than all embodiment only supply to explain the present invention's usefulness; But not limitation of the present invention, the technical staff in relevant technologies field is under the situation that does not break away from the spirit and scope of the present invention; Can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong within the category of the present invention, should be limited each claim, and include within the scope of claim.
Claims (6)
1. a solar LED lamp circuit comprises solar cell (4), rechargeable battery (5), charging circuit (1) and several LED, it is characterized in that: further comprising sunlight detection control circuit and battery over-discharge protection circuit (2), led drive circuit (3), wherein:
Said solar cell (4) a road is connected to charging circuit (1), and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit (2);
Said charging circuit (1) a road is connected to rechargeable battery (5), and another road is connected to sunlight and detects control circuit and battery over-discharge protection circuit (2) and led drive circuit (3);
The output that said sunlight detects control circuit and battery over-discharge protection circuit (2) is connected to led drive circuit (3);
The output of said led drive circuit (3) is received LED; Said led drive circuit (3) adopts pulse frequency modulated DC-DC voltage boosting pressurizer IC as control circuit; Said pulse frequency modulated DC-DC voltage boosting pressurizer IC is when detecting LED that said output connects and big electric current occurs; Starting impulse frequency modulation(FM) mode of operation is to reduce the output current of said output
Described led drive circuit (3) is the circuit with constant-current driving LED that combines peripheral discrete devices inductance L, diode D3, capacitor C and resistance R 3 to constitute with said pulse frequency modulated DC-DC voltage boosting pressurizer IC, wherein:
One end of inductance L connects the positive pole of rechargeable battery (5), and the other end connects the Lx switching tube output of pulse frequency modulated DC-DC voltage boosting pressurizer IC, the positive pole of diode D3, the positive pole of LED; The Vout of the negative pole connection pulse frequency modulated DC-DC voltage boosting pressurizer IC of diode D3 boosts and exports an end of test side, capacitor C; The other end of capacitor C connects an end of resistance R 3, the negative pole of LED; The other end of resistance R 3 is connected to the GND earth terminal of pulse frequency modulated DC-DC voltage boosting pressurizer IC, the negative pole of rechargeable battery (5); Pulse frequency modulated DC-DC voltage boosting pressurizer IC has CE chip controls end.
2. solar LED lamp circuit according to claim 1 is characterized in that: said sunlight detects control circuit and battery over-discharge protection circuit (2) is made up of transistor T, resistance R 2, diode D2 and current-limiting resistance R1, wherein:
The emitter of transistor T connects the positive pole of rechargeable battery (5); Collector electrode connects an end of resistance R 2 and the CE chip controls end of pulse frequency modulated DC-DC voltage boosting pressurizer IC; The other end of resistance R 2 connects the negative pole of rechargeable battery (5); The base stage of transistor T connects the positive pole of diode D2; The negative pole of diode D2 connects the end of current-limiting resistance R1, and the other end of current-limiting resistance R1 connects the positive pole of solar cell.
3. solar LED lamp circuit according to claim 2 is characterized in that: the PN junction number of said diode D2 satisfies calculating formula: (the round as a result of the total rechargeable battery cut-ff voltage of circuit-0.5V)/0.5V.
4. solar LED lamp circuit according to claim 2 is characterized in that: said diode D2 is and the corresponding voltage-stabiliser tube of magnitude of voltage.
5. solar LED lamp circuit according to claim 2 is characterized in that: between the collector electrode of described resistance R 2 and transistor T, also be connected with resistance R 4.
6. solar LED lamp circuit according to claim 2 is characterized in that: between the positive pole of the emitter of described transistor T and rechargeable battery (5), also be connected with resistance R 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100241234A CN101026917B (en) | 2006-02-24 | 2006-02-24 | Solar LED lamp circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100241234A CN101026917B (en) | 2006-02-24 | 2006-02-24 | Solar LED lamp circuit |
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| Publication Number | Publication Date |
|---|---|
| CN101026917A CN101026917A (en) | 2007-08-29 |
| CN101026917B true CN101026917B (en) | 2012-05-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2006100241234A Expired - Fee Related CN101026917B (en) | 2006-02-24 | 2006-02-24 | Solar LED lamp circuit |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009152642A1 (en) * | 2008-06-18 | 2009-12-23 | Meng Zhong | An active self-luminous led lamp |
| CN101505565B (en) * | 2009-03-11 | 2012-01-25 | 华中科技大学 | SoC chip for independent photovoltaic LED lighting special controller |
| CN101853547B (en) * | 2010-04-09 | 2011-08-03 | 北京交通大学 | A frequency-variable LED strobe warning device |
| CN102105007B (en) * | 2010-12-28 | 2013-08-07 | 河海大学常州校区 | LED constant-current driver with boosting function |
| CN103391658A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Solar lawn lamp system |
| CN103391657A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Solar lawn lamp system based on DC/DC boosting voltage stabilizer |
| CN105402623A (en) * | 2015-09-08 | 2016-03-16 | 黄超发 | LED street vendor lamp which can prevent over-discharging and is driven by mobile charger |
| CN107196510B (en) * | 2017-07-28 | 2023-05-26 | 明见（厦门）技术有限公司 | Boost circuit for battery switch control circuit |
| CN109309992B (en) * | 2018-10-26 | 2025-06-10 | 山东弘科能源有限公司 | A ripple-free LED circuit with half-voltage power supply |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2655586Y (en) * | 2003-10-14 | 2004-11-10 | 上海超日太阳能科技发展有限公司 | Solar controller for lamps |
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2006
- 2006-02-24 CN CN2006100241234A patent/CN101026917B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2655586Y (en) * | 2003-10-14 | 2004-11-10 | 上海超日太阳能科技发展有限公司 | Solar controller for lamps |
Non-Patent Citations (1)
| Title |
|---|
| 李继祥 叶景.可调LED亮度的DC—DC转换器TPS61042.《国外电子元器件》.2004,(第2期),58-60. * |
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| CN101026917A (en) | 2007-08-29 |
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