CN104703367A - Large-power light adjusting driving power supply of LED lamp - Google Patents
Large-power light adjusting driving power supply of LED lamp Download PDFInfo
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- CN104703367A CN104703367A CN201510148610.0A CN201510148610A CN104703367A CN 104703367 A CN104703367 A CN 104703367A CN 201510148610 A CN201510148610 A CN 201510148610A CN 104703367 A CN104703367 A CN 104703367A
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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
The invention provides a large-power light adjusting driving power supply of an LED lamp. The large-power light adjusting driving power supply of the LED lamp is characterized by comprising a 8.6-30V power supply, an L type power filter circuit, a DC/ DC converter, a voltage sampling and output voltage adjusting circuit, a power output and protecting circuit and an LED lamp power supply loop; a current mode pulse width modulating integrated circuit IC1 in the DC/ DC converter is of the UC3843 model. According to the large-power light adjusting driving power supply of the LED lamp, the UC3843 current mode pulse width modulating integrated circuit IC1 is used as a core element; a reinforced N-channel large-power field effect tube is used as a power tube; therefore, the DC driving power supply can output large current, and the output voltage can be adjusted; in addition, the DC voltage stabilizing conversion efficiency and working reliability can be greatly improved; the electricity consumption of the LED lamp is not greater than 1/5 of that of the general lamp, so that the ultrahigh-brightness white LED using as a lighting element has an obvious electricity saving effect.
Description
Technical field
The invention belongs to switch power technology field, relate to a kind of LED illumination lamp high-power dimming driving power.
Background technology
LED illumination lamp high-power dimming driving power of the present invention uses 1 ~ 100 super brightness white light-emitting diode LED as light-emitting component.Operating current≤30mA when 1 super brightness white light-emitting diode LED is normal, maximum operating currenbt≤the 3A of 100 super brightness white light-emitting diode LED, and the power of family expenses ceiling light is generally at 60 ~ 100W, the power consumption of LED illumination lamp less than its 1/5th, so use super brightness white light-emitting diode LED to have obvious power savings as light-emitting component, and the feature such as functional reliability is high, caloric value is minimum, long service life.
LED illumination lamp high-power dimming driving power of the present invention uses current mode pulse width IC of modulating UC3843 as core parts, adopt enhancement mode N channel high power field effect transistor as power tube, this direct current driving power supply can not only export big current, output voltage is adjustable, and has increased substantially the conversion efficiency of driving power and the reliability of work.
The circuit of LED illumination lamp high-power dimming driving power all uses ordinary electronic components and parts to make, and cost of manufacture, less than 20 yuans, is well suited for carrying out batch exploitation for factory.
Below describe in detail LED illumination lamp high-power dimming driving power of the present invention necessity involved in implementation process, guardian technique content.
Summary of the invention
Goal of the invention and beneficial effect: LED illumination lamp high-power dimming driving power of the present invention uses current mode pulse width IC of modulating UC3843 as core parts, adopt enhancement mode N channel high power field effect transistor as power tube, this direct current driving power supply can not only export big current, output voltage is adjustable, and has increased substantially the conversion efficiency of DC voltage-stabilizing and the reliability of work.The power consumption of LED illumination lamp less than its 1/5th, so use super brightness white light-emitting diode LED to have obvious power savings as light-emitting component, but also features such as functional reliability is high, caloric value is minimum, long service life.
Circuit working principle: select current mode pulse width IC of modulating IC1 as the core parts of circuit, its model is UC3843.UC3843 is a kind of DC/DC converter high-performance fixed frequency current mode controller.UC3843 has the oscillator of frequency-adjustable, and accurately can control duty ratio, temperature-compensating, the amplification of high-gain error etc., it has current sampling comparator and High-current output function, and its peripheral need use a small amount of element to realize design object.
LED illumination lamp high-power dimming driving power by power supply, L-type electric source filter circuit, DC/DC converter be current mode pulse width modulation controller, power output circuit, protective circuit form.
The defencive function that circuit uses
For meeting the requirement of extensive use driving power, guaranteeing use safety, enabling the own defencive function of integrated circuit and in circuit design, having newly increased two kinds of safeguard measures:
1. utilize the threshold value protective circuit of UC3843 integrated circuit self, by the peripheral current sampling resistor of the 3rd pin of current mode pulse width IC of modulating IC1, realize power take-off overload or short-circuit protection.After the trouble shooting of D.C. regulated power supply output, circuit can recover normal work automatically;
2., when power supply voltage is lower than V threshold value 8.6, current mode pulse width IC of modulating IC1 automatically enters under-voltage locking and stops voltage output, effectively protects power supply and is unlikely over-discharge.
Technical scheme: LED illumination lamp high-power dimming driving power; it comprises 8.6 ~ 30V power supply, L-type electric source filter circuit, DC/DC converter, voltage sampling and output voltage regulation circuit, power stage and protective circuit, LED illumination lamp current supply circuit, it is characterized in that:
DC/DC converter: it is by current mode pulse width IC of modulating IC1, resistance R2, electric capacity C2 and electric capacity C3 forms, the model that current mode pulse width IC of modulating IC1 adopts is UC3843, 7th pin of current mode pulse width IC of modulating IC1 connects L-type electric source filter circuit, 8th pin of current mode pulse width IC of modulating IC1 connects one end of current mode pulse width IC of modulating IC1 the 4th pin and electric capacity C2 by resistance R2, 5th pin of current mode pulse width IC of modulating IC1 and the other end connection circuit ground GND of electric capacity C2, 2nd pin of current mode pulse width IC of modulating IC1 connects voltage sampling and output voltage regulation circuit, 3rd pin of current mode pulse width IC of modulating IC1 is by electric capacity C3 connection circuit ground GND, 6th pin of current mode pulse width IC of modulating IC1 connects power stage and protective circuit,
L-type electric source filter circuit: it is made up of resistance R1 and electrochemical capacitor C1, the positive pole of electrochemical capacitor C1 connects the 7th pin of current mode pulse width IC of modulating IC1 and one end of resistance R1, the negative pole connection circuit ground GND of the other end connection circuit positive pole VCC of resistance R1, electrochemical capacitor C1;
Voltage sampling and output voltage regulation circuit: it is by positive-negative-positive triode BG1, resistance R3, resistance R4, potentiometer RP and electrochemical capacitor C4 forms, 2nd pin of current mode pulse width IC of modulating IC1 connects the collector electrode of positive-negative-positive triode BG1 and one end of resistance R4 by resistance R3, the other end connection circuit ground GND of resistance R4, the emitter of positive-negative-positive triode BG1 connects one end of potentiometer RP, the other end of potentiometer RP and movable end connection circuit positive pole VCC thereof, the base stage of positive-negative-positive triode BG1 connects the negative pole of electrochemical capacitor C4 and the negative pole of regulated voltage output terminals, the positive pole connection circuit positive pole VCC of electrochemical capacitor C4 and the positive pole of regulated voltage output terminals,
Power stage and protective circuit: it is by power output tube BG2, resistance R5, resistance R6, sustained diode 1, inductance L, resistance R8 and resistance R7 forms, power output tube BG2 adopts enhancement mode N channel high power field effect transistor, the model selected is IRFZ32, 6th pin of current mode pulse width IC of modulating IC1 connects the grid G of power output tube BG2 by resistance R5, the drain D of power output tube BG2 connects the positive pole of fly-wheel diode D1 and one end of inductance L, the negative pole connection circuit positive pole VCC of sustained diode 1, the base stage of another termination positive-negative-positive triode BG1 of inductance L and the negative pole of regulated voltage output terminals, the source S of power output tube BG2 and one end of resistance R6, one end of resistance R8 and one end of resistance R7 are connected, the grid G of another termination power output tube BG2 of resistance R6, the other end of the 3rd pin connecting resistance R7 of current mode pulse width IC of modulating IC1, the other end connection circuit ground GND of resistance R8,
Light-emitting diode current supply circuit: it is by n LED 1 ~ LEDn parallel connection access current supply circuit, n≤100, light-emitting diode selects super bright white light-emitting diode, the negative pole of the positive pole connection circuit positive pole VCC of LED 1 ~ LEDn, LED 1 ~ LEDn connects the base stage of positive-negative-positive triode BG1 and the negative pole of electrochemical capacitor C4;
The positive pole of 8.6 ~ 30V power supply is connected with the positive pole of circuit anode VCC and regulated voltage output terminals, and the negative pole of 8.6 ~ 30V power supply is connected with circuit ground GND.
Accompanying drawing explanation
Accompanying drawing 1 is LED illumination lamp high-power dimming driving power provided by the invention embodiment circuit working schematic diagram.
Embodiment
According to the LED illumination lamp high-power dimming driving power circuit fundamental diagram shown in accompanying drawing 1 and accompanying drawing explanation, and according to annexation between components and parts in each several part circuit described in summary of the invention, and components and parts technical parameter described in execution mode requires and circuit production main points are carried out enforcement and can be realized the present invention, is further described correlation technique of the present invention below in conjunction with embodiment.
The selection requirement of components and parts
Components and parts work under will being applicable to summer high temperature condition.Components and parts are selected to make every effort to working stability, reliably for principle.The as far as possible wide and resistant to elevated temperatures components and parts of screening Acclimation temperature, power component parameter should be more than 3 times of working index.
The title of components and parts and technical parameter
| Sequence number | Components and parts title | Major parameter | Explanation | Quantity |
| IC1 | Current type pulse-width modulation is integrated | UC3843 dual inline type | Or UC3845 | 1 |
| BG1 | Triode 2SC9015 | Plastic packaging β >=200, TO-92 | 2SC9012 | 1 |
| BG2 | Enhancement mode N channel field-effect pipe | TO—220IRFZ32 | Or IRFZ30 | 1 |
| D1 | Schottky diode | MBR1545 | TO—220 | 1 |
| R1 | Metalfilmresistor | 1/4W 24～33Ω | Step-down filtering | 1 |
| R2 | Fixed carbon resister | 1/8W 8.2KΩ | Oscillator | 1 |
| R3、R4 | Fixed carbon resister | 1/8W 2.2KΩ | Divider resistance | 2 |
| R5 | Fixed carbon resister | 1/8W 100Ω | Resistance | 1 |
| R6 | Fixed carbon resister | 1/8W 12KΩ | Biasing resistor | 1 |
| R7 | Fixed carbon resister | 1/8W 430Ω | Current feedback | 1 |
| R8 | Metalfilmresistor | 1/2W 0.22Ω | Current sampling | 1 |
| RP | Potentiometer | 1/8W 3.2KΩ | Output voltage regulates | 1 |
| C1 | Electrochemical capacitor | 47μF/35V | Filter capacitor | 1 |
| C2 | Electric capacity | 0.01μF | Oscillator | 1 |
| C3 | Electric capacity | 1000P | Oscillating capacitance | 1 |
| C4 | Electrochemical capacitor | 470μF/35V | Filter capacitor | 1 |
| L | Inductance | FERRITE CORE EI25 | Flat around 25 circles | 1 |
| Radiator | Solderable radiator | Applicable T-220 is selected to encapsulate | 1 |
1. use target for realizing LED illumination lamp high-power dimming driving power, the current type pulsewidth modulated intergrated circuit UC3843 with defencive function selected by circuit core element; LED 1 ~ LEDn selects super bright white light-emitting diode.
2. power output circuit: consider that the conducting resistance of switching tube is little, the factor such as the shell sizes of device and heat sink size, power output tube BG2 selects the enhancement mode N channel high power field effect transistor of TO-220 Plastic Package, and its model is IRFZ32;
3. the selection of filter capacitor: generally, the capacity of power filtering capacitor is as well larger, but the present invention is switching circuit, and the capacity of filter capacitor too conference increases the distributed inductance of circuit and affects the filter effect of Switching Power Supply to high order harmonic component.The present invention considers the bulk into saving circuit board, for improving filter effect and the radiated interference of minimizing to periphery remote control equipment of Switching Power Supply, many capacity can be used to be that 220 μ F electrochemical capacitors replace.
The making of part of devices and circuit production main points
1. inductance makes: inductance is the Primary Component whether LED illumination lamp high-power dimming driving power is successful, FERRITE CORE selects model EI25, lingual surface size 6.5mm × 6.5mm, with 10 strands, ￠ 0.29 ~ 0.31mm enamelled wire twisted (each inductance needs twisted wire length to be about 130cm), flat around 25 ~ 26 circles at magnetic core framework higher slice; Inductance also can select circular ferrite (magnet ring) to make, and wear around 30 ~ 32 circles with single ￠ 0.8mm enamelled wire, coiling ring-shaped inductors is worn and is wound with certain technical difficulty, and cost of manufacture is also relatively high;
2. radiator: the plastic casing space used because of igniter is very little, the solderable radiator that radiator selects applicable T-220 to encapsulate.Because D.C. regulated power supply uses switching circuit, field effect transistor power is comparatively large, conducting resistance is very little, so the heat that field effect transistor operationally produces is little, to such an extent as to does not use radiator also can normally work.
Circuit debugging
Before the debugging of LED illumination lamp high-power dimming driving power, carefully check the components and parts of welding, whether wiring conforms to completely with circuit working schematic diagram, pay special attention to check that diode, triode, electrochemical capacitor etc. have the element of polarity, check the welding quality of components and parts one by one, eliminate rosin joint, dry joint.
1. no load test: power supply output voltage is transferred to 12V, measures output voltage by digital multimeter, generally, circuit can normally work without the need to debugging;
2. output short-circuit test: the extreme case that two kinds of short circuits be tested, one is the artificial short-circuit test of output under Light Condition; Two is that when being connected to load, output people tests for when short circuit.Will connect digital multimeter respectively when testing, observe after output short circuit is removed, can output end voltage value be recovered immediately;
3. power supply voltage range test: the voltage of power supply is minimum is 8.6V, and as power supply voltage < 8.5V, circuit enters under-voltage protection state automatically, and output end voltage is zero substantially; When power supply voltage is 30V, conversion efficiency is the highest, and the input current in power supply loop is minimum; Use the voltage more than 30V for power supply, the present invention does not have design protection circuit function;
4. power supply input current test during zero load: during power supply voltage 12V, operating current≤9mA, unloaded maximum output voltage 3.5V;
5. in light, heavy duty situation, test complete machine input current: when power supply voltage is 12V, respectively when light, heavy duty, in test power supply input circuit, current margin is 0.45 ~ 0.65A.
Technical indicator
1. input voltage: 8.6 ~ 30V (as power supply voltage < 8.6V, D.C. regulated power supply will enter under-voltage protection state);
2. input current: 0.45 ~ 0.65A (power supply input voltage is higher, and input current is less);
3. output voltage: 1.5 ~ 3.5V;
4. output current: 0 ~ 4.0A;
5. conversion efficiency: as power supply 12V, conversion efficiency is about 86%, and power supply voltage is higher, and conversion efficiency is higher.
Circuit components layout of the present invention, circuit structure design, its shape and size etc. of outward appearance are not all key technologies of the present invention; neither application claims protection technology contents; because not affecting specific implementation process of the present invention, therefore do not illustrate one by one in the description.
Claims (1)
1. a LED illumination lamp high-power dimming driving power; it comprises 8.6 ~ 30V power supply, L-type electric source filter circuit, DC/DC converter, voltage sampling and output voltage regulation circuit, power stage and protective circuit, LED illumination lamp current supply circuit, it is characterized in that:
Described DC/DC converter is by current mode pulse width IC of modulating IC1, resistance R2, electric capacity C2 and electric capacity C3 forms, the model that current mode pulse width IC of modulating IC1 adopts is UC3843, 7th pin of current mode pulse width IC of modulating IC1 connects L-type electric source filter circuit, 8th pin of current mode pulse width IC of modulating IC1 connects one end of current mode pulse width IC of modulating IC1 the 4th pin and electric capacity C2 by resistance R2, 5th pin of current mode pulse width IC of modulating IC1 and the other end connection circuit ground GND of electric capacity C2, 2nd pin of current mode pulse width IC of modulating IC1 connects voltage sampling and output voltage regulation circuit, 3rd pin of current mode pulse width IC of modulating IC1 is by electric capacity C3 connection circuit ground GND, 6th pin of current mode pulse width IC of modulating IC1 connects power stage and protective circuit,
Described L-type electric source filter circuit is made up of resistance R1 and electrochemical capacitor C1, the positive pole of electrochemical capacitor C1 connects the 7th pin of current mode pulse width IC of modulating IC1 and one end of resistance R1, the negative pole connection circuit ground GND of the other end connection circuit positive pole VCC of resistance R1, electrochemical capacitor C1;
Described voltage sampling and output voltage regulation circuit are by positive-negative-positive triode BG1, resistance R3, resistance R4, potentiometer RP and electrochemical capacitor C4 forms, 2nd pin of current mode pulse width IC of modulating IC1 connects the collector electrode of positive-negative-positive triode BG1 and one end of resistance R4 by resistance R3, the other end connection circuit ground GND of resistance R4, the emitter of positive-negative-positive triode BG1 connects one end of potentiometer RP, the other end of potentiometer RP and movable end connection circuit positive pole VCC thereof, the base stage of positive-negative-positive triode BG1 connects the negative pole of electrochemical capacitor C4 and the negative pole of regulated voltage output terminals, the positive pole connection circuit positive pole VCC of electrochemical capacitor C4 and the positive pole of regulated voltage output terminals,
Described power stage and protective circuit are by power output tube BG2, resistance R5, resistance R6, sustained diode 1, inductance L, resistance R8 and resistance R7 forms, power output tube BG2 adopts enhancement mode N channel high power field effect transistor, the model selected is IRFZ32, 6th pin of current mode pulse width IC of modulating IC1 connects the grid G of power output tube BG2 by resistance R5, the drain D of power output tube BG2 connects the positive pole of fly-wheel diode D1 and one end of inductance L, the negative pole connection circuit positive pole VCC of sustained diode 1, the base stage of another termination positive-negative-positive triode BG1 of inductance L and the negative pole of regulated voltage output terminals, the source S of power output tube BG2 and one end of resistance R6, one end of resistance R8 and one end of resistance R7 are connected, the grid G of another termination power output tube BG2 of resistance R6, the other end of the 3rd pin connecting resistance R7 of current mode pulse width IC of modulating IC1, the other end connection circuit ground GND of resistance R8,
Described light-emitting diode current supply circuit is by n LED 1 ~ LEDn parallel connection access current supply circuit, n≤100, light-emitting diode selects super bright white light-emitting diode, the negative pole of the positive pole connection circuit positive pole VCC of LED 1 ~ LEDn, LED 1 ~ LEDn connects the base stage of positive-negative-positive triode BG1 and the negative pole of electrochemical capacitor C4;
The positive pole of described 8.6 ~ 30V power supply is connected with the positive pole of circuit anode VCC and regulated voltage output terminals, and the negative pole of 8.6 ~ 30V power supply is connected with circuit ground GND.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510148610.0A CN104703367A (en) | 2015-04-01 | 2015-04-01 | Large-power light adjusting driving power supply of LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510148610.0A CN104703367A (en) | 2015-04-01 | 2015-04-01 | Large-power light adjusting driving power supply of LED lamp |
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| CN104703367A true CN104703367A (en) | 2015-06-10 |
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| CN201510148610.0A Pending CN104703367A (en) | 2015-04-01 | 2015-04-01 | Large-power light adjusting driving power supply of LED lamp |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105338703A (en) * | 2015-11-10 | 2016-02-17 | 常州市巨泰电子有限公司 | Vertical driving power supply for lamp |
| CN112272429A (en) * | 2020-10-26 | 2021-01-26 | 兰普电器股份有限公司 | Light source driver |
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| CN101925230A (en) * | 2010-07-29 | 2010-12-22 | 福建捷联电子有限公司 | LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost |
| CN102769959A (en) * | 2011-05-06 | 2012-11-07 | 海洋王照明科技股份有限公司 | LED light-dimming driving circuit |
| US20130154483A1 (en) * | 2011-12-14 | 2013-06-20 | Texas Instruments Incorporated | Method and apparatus to measure light intensity |
| CN103326571A (en) * | 2013-07-10 | 2013-09-25 | 黄宇嵩 | Non-isolated high-current adjustable DC (Direct-Current) stabilized-voltage power supply |
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| CN101056051A (en) * | 2006-04-14 | 2007-10-17 | 上海欣丰电子有限公司 | A DC/DC communication switch power |
| CN101925230A (en) * | 2010-07-29 | 2010-12-22 | 福建捷联电子有限公司 | LED (Light Emitting Diode) drive power source with high efficiency, low power consumption and low cost |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105338703A (en) * | 2015-11-10 | 2016-02-17 | 常州市巨泰电子有限公司 | Vertical driving power supply for lamp |
| CN112272429A (en) * | 2020-10-26 | 2021-01-26 | 兰普电器股份有限公司 | Light source driver |
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