CN202143243U - AC commercial power LED illuminating lamp drive circuit - Google Patents
AC commercial power LED illuminating lamp drive circuit Download PDFInfo
- Publication number
- CN202143243U CN202143243U CN201020298144U CN201020298144U CN202143243U CN 202143243 U CN202143243 U CN 202143243U CN 201020298144 U CN201020298144 U CN 201020298144U CN 201020298144 U CN201020298144 U CN 201020298144U CN 202143243 U CN202143243 U CN 202143243U
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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
Abstract
An AC commercial power LED illuminating lamp drive circuit is composed of an AC constant current power supply circuit, a bridge type rectification circuit, a filter circuit and a time delay and protection circuit. The time delay and protection circuit is composed of a slow startup lightening circuit and an output capacitor on-line isolation and protection circuit, one access end of the AC commercial power is connected with one end of the AC constant current power supply circuit which is formed by connecting a reactor and a first bypass resistor in parallel. The other end of the AC constant current power supply circuit is connected with one AC input end of the bridge type rectification circuit which is composed of semiconductor rectifier diodes. The other AC input end of the bridge type rectification circuit is connected with the other access end of the AC commercial power. One DC output end of the bridge type rectification circuit is connected with the input/output common end parallel junction of a drain resistor, a time-delay capacitor and a semiconductor control component of the slow startup lightening circuit. The other DC output end of the bridge type rectification circuit is connected with the parallel junction of an output capacitor, a second bypass resistor and LED light strings of the output capacitor on-line isolation and protection circuit.
Description
Technical field
The utility model relates to a kind of LED illuminating lamp drive circuit, relates in particular to a kind of LED illuminating lamp drive circuit by the electric main power supply.
Background technology
At present high brightness, ultra-high brightness LED light-emitting diode extensively put it into commercial operation and since its as the 4th generation light source significant advantage, will replace traditional incandescent lamp becomes a new generation with (energy-saving) fluorescent lamp lighting source.But the LED illuminating lamp can get into family as early as possible, gets into each public place, also faces some difficulties, and wherein production cost is higher, also is one of difficult problem.From the sales situation of market, can see that people admit the good characteristic of LED lamp, but its higher price has suppressed consumption demand, thereby hindered spreading speed.
Through analysis, can know its light-emitting component to the price structure of existing LED illuminating lamp---the electric light conversion usefulness and the manufacturing cost of LED light-emitting diode, tentatively possess the condition of popularizing and promoting, and Energy Efficiency Ratio and cost performance are still further improving in manufacturing firm.And cause another higher principal element of LED lighting whole price level, be its drive circuit.Existing direct current constant-current drive circuit through AC/DC, the conversion of DC/DC switch module, complicated circuit, heating is serious, and circuit conversion efficient is low, and the high-frequency oscillation signal radiation is arranged simultaneously, and is similar with energy-saving fluorescent lamp, and this type of drive circuit failure rate is higher, and useful life is short.
Since electrical lamp is arranged, be used for the lighting of family and public place, the constant not very high requirement of illumination brightness.The same with incandescent lamp, fluorescent lamp, people to the electric light tool brightness in civil power allows fluctuation range corresponding strong and weak the variation arranged is complete acceptable.
The utility model has been released a popular electric main LED illuminating lamp drive circuit based on above analysis.This circuit structure is simple; Stable performance, reliable; No heater element, circuit conversion efficient is high, simultaneously LED LED light string 51 is had defencive function; Make the LED light-emitting diode be operated in constant current voltage stabilizing state basically, the light-emitting component of light fixture is expected to reach the nominal useful life of LED light-emitting diode.
The utility model content
The utility model technical problem to be solved provides the electric main LED illuminating lamp drive circuit that a kind of AC/DC simple in structure, functional, that cost is low once changes.
The utility model technical scheme is made up of interchange constant-current power supply circuit, bridge rectifier, filter circuit and time-delay, protective circuit, and particular content is:
Described time-delay, protective circuit are made up of slow circuit and the online isolation protective circuit of output capacitor of starting light, and wherein are made up of semiconductor control element 41 and time delay resistance device 23, drain resistor 24 and delay capacitor 13 and delay the circuit that starts light; Form the online isolation protective circuit of output capacitor by semiconductor control element 41 and semiconductor isolating diode 35, shunt resistor 25, second bypassed resistor 22, output capacitor 12;
Their annexation: incoming end of electric main is connected with constant-current power supply circuit one end that exchanges that the reactor 11 and first bypassed resistor 21 compose in parallel; The interchange constant-current power supply circuit other end exchanges input one end and is connected with the bridge rectifier of being made up of semiconductor rectifier diode 31,32,33 and 34; Bridge rectifier exchanges another incoming end of the input other end and electric main and is connected; The bridge rectifier direct current is exported an end and is connected with input, output common port and the contact of drain resistor 24, delay capacitor 13 and the semiconductor control element 41 of the slow circuit that starts light; The bridge rectifier direct current output other end, with the output capacitor of the online isolation protective circuit of output capacitor 12, second bypassed resistor 22, and LED lamp string 51 and contact be connected.
The further described slow circuit that starts light, the delay circuit and the drain resistor 24 that are made up of time delay resistance device 23 and connecting of delay capacitor 13 compose in parallel; At the tie point of time delay resistance device 23, extremely link to each other the conducting and the shutoff of control semiconductor control element 41 with the input control of semiconductor control element 41 with delay capacitor 13.
The online isolation protective circuit of the described output capacitor of postscript is composed in series by an end of output loop one end of semiconductor control element 41 and semiconductor isolating diode 35, shunt resistor 25; The output loop other end of semiconductor control element 41 is parallelly connected with the tie point of drain resistor 24, delay capacitor 13, inserts the bridge rectifier direct current and exports an end; At the output loop of semiconductor control element 41 and a utmost point tie point of semiconductor isolating diode 35, be connected with parallel circuits one end of the output capacitor 12 and second bypassed resistor 22; The parallel circuits other end of the output capacitor 12 and second bypassed resistor 22 with LED lamp string 51 1 ends and after connecing, is connected with the bridge rectifier direct current output other end; Shunt resistor 25 other ends are parallelly connected with the tie point of drain resistor 24, time delay resistance device 23, are connected with LED lamp string 51 other ends.
Interchange constant-current power supply circuit is wherein composed in parallel by the reactor 11 and first bypassed resistor 21; Reactor 11 is capacitor or inductor.
Slow circuit and the online isolation protective circuit of output capacitor of starting light wherein is located at the positive terminal of LED lamp string 51 or is located at the negative pole end of LED lamp string 51.
Be suitable for the characteristic of constant current power supply based on the LED light-emitting diode, and consider constant-current supply (being high-resistance power supply) in electric, will be in high internal resistance consumed power produce the principle of heat.The utility model has adopted the reactor reduction voltage circuit, and as the dynamic electric resistor Δ R of reactance value X and LED lamp string 51, satisfies: during X >=10 * Δ R, circuit can be considered interchange high impedance constant-current supply (hereinafter to be referred as " interchange constant-current supply ").Because desirable reactance component consumed power not in alternating current circuit is so the circuit energy conversion efficiency of the utility model is very high.
Because constant-current supply is when load open circuit, output end voltage will reach maximum---the electromotive force of constant-current supply.So directly use separately and exchange constant-current supply driving LED lamp string (seeing accompanying drawing 5), when load open circuit, when promptly LED lamp string 51 is opened a way, also can reach the civil power maximum at output.If the unprotect measure, output capacitor 12 will produce the dc high voltage of 220 * √ 2 (110 * √ 2) this moment, in case LED lamp string 51 inserts (or open circuit point is touched) once more, whole LED lamp string 51 burnt totally.The utility model has adopted the online buffer circuit (seeing accompanying drawing 1) of output capacitor 12.When LED lamp string 51 open circuit, output capacitor 12 immediately with exchanges constant-current power supply circuit and isolates, and discharge through second bypassed resistor 22, make voltage on the output capacitor 12 at certain hour (τ
2=22 * 12) be tending towards 0V in.Like this when LED lamp string 51 inserts (or open circuit point is touched) once more, output capacitor 12 have one progressively charging reach the process of operating voltage.
All types of electrical lamps are powering up when turning on light the most easily because of the impact failure of power supply, and the LED illuminating lamp is no exception.So the utility model has adopted the slow technology that starts light, when turning on light or when inserting (or open circuit point is touched) once more behind LED lamp string 51 open circuits, slowly start delay circuit work: make LED lamp string 51 light delay certain hour (τ slightly earlier with＜1mA operating current
3=23 * 13) after, make 41 conductings of semiconductor control element, light LED lamp string 51 fully.
The circuit structure of the utility model is seen accompanying drawing 1, accompanying drawing 2, and operation principle is following:
Form with first bypassed resistor 21 by reactor 11 and to exchange constant-current power supply circuit, constant-current supply is provided this illuminating lamp.Form bridge rectifier by semiconductor rectifier diode 31,32,33 and 34, will exchange constant-current supply and convert dc constant flowing power to and electric energy is provided LED lamp string 51.
Form the slow circuit that starts light by semiconductor control element 41, time delay resistance device 23, drain resistor 24 with delay capacitor 13, by timeconstant
3Can confirm the length of delay time.When just turning on light, drain resistor 24 is parallelly connected with the charge circuit of being made up of time delay resistance device 23, delay capacitor 13, and the path of LED lamp string 51 little light currents is provided.When the voltage of delay capacitor 13 is raised to unlatching (conducting) voltage (electric current) of semiconductor control element 41; 41 conductings of semiconductor control element; The flow through operating current of LED lamp string 51; Through shunt resistor 25, the output loop of semiconductor isolating diode 35 and semiconductor control element 41 flows into the negative pole of bridge rectifier.Turn off the light or LED lamp string 51 open circuit after, drain resistor 24, time delay resistance device 23 have been composed in series the discharge loop of delay capacitor 13.Turn off the light or LED lamp string 51 open circuit at the beginning of, control element 41 still is in conducting state, it and semiconductor isolating diode 35, shunt resistor 25, time delay resistance device 23 have been formed the initial stage repid discharge loop of delay capacitor 13.
Simultaneously, the open loop protection circuit of forming LED lamp string 51 by semiconductor control element 41, semiconductor isolating diode 35, second bypassed resistor 22, shunt resistor 25 and output capacitor 12.The anodal operating current of just often forming of exporting of bridge rectifier via semiconductor rectifier diode 31,32,33 and 34; Flow through behind the LED lamp string 51; Through shunt resistor 25, the output loop of semiconductor isolating diode 35 and semiconductor control element 41 flows into the negative pole of bridge rectifier.When LED lamp string 51 open circuit, the electric charge on the delay capacitor 13, the one tunnel through time delay resistance device 23, shunt resistor 25, semiconductor isolating diode 35 and the semiconductor control element that still is in the conducting shape 41 discharges (be initial stage repid discharge loop); One tunnel series loop discharge through time delay resistance device 23, drain resistor 24.When the voltage of delay capacitor 13 drops to shutoff (ending) voltage (electric current) of semiconductor control element 41; Semiconductor control element 41 turn-offs, and bridge rectifier positive electrical stream oppositely ends semiconductor isolating diode 35 through second bypassed resistor 22.This moment output capacitor 12 with exchange the high impedance constant-current power supply circuit and realized online isolation.Meanwhile, the electric charge of output capacitor 12 discharges through second bypassed resistor 22, and the voltage of output capacitor 12 is through time τ
2Get back near 0V.
Other element: first bypassed resistor 21 discharges the loop for reactance (appearance) device 11 provides residual electric charge.Shunt resistor 25 provides the forward operating voltage to the semiconductor control element 41 control utmost points when operate as normal.When multi-string LED lamp string 51 is connected in parallel, play shunting action.
The utility model contrast prior art has following beneficial effect:
The utility model has overcome above-mentioned many shortcomings of existing drive circuit through the conversion of AC/DC, DC/DC switch module effectively; And owing to adopted slow start light circuit and the online isolation protective circuit of output capacitor; Make the utility model reach performance index through the drive circuit of AC/DC, DC/DC switch module conversion, make the LED illuminating lamp popularize early, promoted the use of maybe.
Description of drawings
Fig. 1 is an electric main LED illuminating lamp drive circuit schematic diagram.
Fig. 2 is electric main LED illuminating lamp thick film integrated drive electronics or electronics integrated drive electronics schematic diagram.
Fig. 3 is electric main LED illuminating lamp thick film integrated package or electronic integration block circuit theory diagrams.
Fig. 4 is a 2W electric main LED illuminating lamp drive circuit case study on implementation circuit diagram.
Fig. 5 is basic communication (high impedance) constant-current supply schematic diagram.
11. reactors among the figure, 12. output capacitors, 13. delay capacitors; 21. first bypassed resistor, 22. second bypassed resistors, 23. time delay resistance devices; 24. drain resistor, 25. shunt resistors, 31,32,33 and 34. semiconductor rectifier diodes; 35. the semiconductor isolating diode, 41. semiconductor control elements, 51.LED lamp string.
Embodiment
This circuit LED lamp string 51 working powers: P
Lamp=17mA * 114V=1.938W
And circuitry consumes power is made up of three parts:
Consumed power: P on first bypassed resistor 21
21=151V
2/ 300K=76mW
Consumed power: P on second bypassed resistor 22
22=117V
2/ 1M=13.7mW
Consumed power: P between protection control circuit BC
BC=17mA * 3.5V=59.5mW
Total power consumption: P
Consumption=P
21+ P
22+ P
BC=149.2mW
Circuit conversion efficiency eta=P
Lamp/ (P
Lamp+ P
Consumption)=1.938W/ (1.938W+149.2mW)=92.9%
If to LED multi-path lamp connection in series-parallel power supply, then circuit conversion efficient will be higher with a control circuit.
This practical circuit diagram; Mix the LED lamp string that sell the open market; The LED light-emitting diode is distributed on the semicircle tube wall with even interval two rows, and length is 28CM (similar 8W fluorescent tube), and then brightness is near the brightness (user's subjective assessment) of 7W power saving fluorescent lamp.In view of the above, can get this LED lamp than power saving fluorescent lamp power saving more than 2/3.
Claims (7)
1. electric main LED illuminating lamp drive circuit; Constitute by interchange constant-current power supply circuit, bridge rectifier, filter circuit and time-delay, protective circuit; It is characterized in that: described time-delay, protective circuit are made up of slow circuit and the online isolation protective circuit of output capacitor of starting light, and wherein are made up of semiconductor control element (41) and time delay resistance device (23), drain resistor (24) and delay capacitor (13) and delay the circuit that starts light; Form the online isolation protective circuit of output capacitor by semiconductor control element (41) and semiconductor isolating diode (35), shunt resistor (25), second bypassed resistor (22), output capacitor (12); Incoming end of electric main is connected with constant-current power supply circuit one end that exchanges that reactor (11) and first bypassed resistor (21) compose in parallel; The interchange constant-current power supply circuit other end exchanges input one end and is connected with the bridge rectifier of being made up of semiconductor rectifier diode (31,32,33 and 34); Bridge rectifier exchanges another incoming end of the input other end and electric main and is connected; The bridge rectifier direct current is exported an end and is connected with input, output common port and the contact of drain resistor (24), delay capacitor (13) and semiconductor control element (41) of the slow circuit that starts light; The bridge rectifier direct current output other end, with the output capacitor (12) of the online isolation protective circuit of output capacitor, second bypassed resistor (22), and LED lamp string (51) and contact be connected.
2. electric main LED illuminating lamp drive circuit as claimed in claim 1 is characterized in that: the described slow circuit that starts light is composed in parallel with the delay circuit and the drain resistor (24) that constitutes of connecting of delay capacitor (13) by time delay resistance device (23); At the tie point of time delay resistance device (23), extremely link to each other the conducting and the shutoff of control semiconductor control element (41) with the input control of semiconductor control element (41) with delay capacitor (13).
3. electric main LED illuminating lamp drive circuit as claimed in claim 1; It is characterized in that: the online isolation protective circuit of described output capacitor is composed in series by an end of output loop one end of semiconductor control element (41) and semiconductor isolating diode (35), shunt resistor (25); The output loop other end of semiconductor control element (41) is parallelly connected with the tie point of drain resistor (24), delay capacitor (13), inserts the bridge rectifier direct current and exports an end; At the output loop of semiconductor control element (41) and a utmost point tie point of semiconductor isolating diode (35), be connected with parallel circuits one end of output capacitor (12) and second bypassed resistor (22); The parallel circuits other end of output capacitor (12) and second bypassed resistor (22) with LED lamp string (51) one ends and after connecing, is connected with the bridge rectifier direct current output other end; Shunt resistor (25) other end is parallelly connected with the tie point of drain resistor (24), time delay resistance device (23), is connected with LED lamp string (51) other end.
4. electric main LED illuminating lamp drive circuit as claimed in claim 1 is characterized in that: described interchange constant-current power supply circuit is composed in parallel by reactor (11) and first bypassed resistor (21); Reactor (11) is capacitor or inductor.
5. electric main LED illuminating lamp drive circuit as claimed in claim 1 is characterized in that: described semiconductor control element (41) is FET, triode or thyristor.
6. electric main LED illuminating lamp drive circuit as claimed in claim 1 is characterized in that: described slow circuit and the online isolation protective circuit of output capacitor of starting light is located at the positive terminal of LED lamp string (51) or is located at the negative pole end of LED lamp string (51).
7. electric main LED illuminating lamp drive circuit as claimed in claim 1 is characterized in that: described LED lamp string (51), and form or form by the LED light-emitting diode is single by N series and parallel of LED light-emitting diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020298144U CN202143243U (en) | 2010-08-19 | 2010-08-19 | AC commercial power LED illuminating lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020298144U CN202143243U (en) | 2010-08-19 | 2010-08-19 | AC commercial power LED illuminating lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202143243U true CN202143243U (en) | 2012-02-08 |
Family
ID=45554278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020298144U Expired - Fee Related CN202143243U (en) | 2010-08-19 | 2010-08-19 | AC commercial power LED illuminating lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202143243U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840325A (en) * | 2012-11-23 | 2014-06-04 | 上海立新液压有限公司 | Wide voltage range alternating-current and direct-current universal lamp-provided plug |
| CN104052273A (en) * | 2013-06-17 | 2014-09-17 | 崇贸科技股份有限公司 | Adjustable power converter and output selecting method and apparatus thereof |
| CN107222007A (en) * | 2017-07-17 | 2017-09-29 | 潘仁忠 | A kind of charging circuit based on electrical appliance and apply its circuit arrangement |
| CN107620908A (en) * | 2017-08-28 | 2018-01-23 | 欧普照明股份有限公司 | High voltage and constant current chip and constant-current supply |
| CN113873718A (en) * | 2021-10-18 | 2021-12-31 | 成都世纪光合作用科技有限公司 | Light modulation control device |
-
2010
- 2010-08-19 CN CN201020298144U patent/CN202143243U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103840325A (en) * | 2012-11-23 | 2014-06-04 | 上海立新液压有限公司 | Wide voltage range alternating-current and direct-current universal lamp-provided plug |
| CN104052273A (en) * | 2013-06-17 | 2014-09-17 | 崇贸科技股份有限公司 | Adjustable power converter and output selecting method and apparatus thereof |
| CN107222007A (en) * | 2017-07-17 | 2017-09-29 | 潘仁忠 | A kind of charging circuit based on electrical appliance and apply its circuit arrangement |
| CN107620908A (en) * | 2017-08-28 | 2018-01-23 | 欧普照明股份有限公司 | High voltage and constant current chip and constant-current supply |
| CN107620908B (en) * | 2017-08-28 | 2023-11-21 | 欧普照明股份有限公司 | High-voltage constant-current chip and constant-current power supply |
| CN113873718A (en) * | 2021-10-18 | 2021-12-31 | 成都世纪光合作用科技有限公司 | Light modulation control device |
| CN113873718B (en) * | 2021-10-18 | 2023-11-28 | 成都世纪光合作用科技有限公司 | Dimming control device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120208 Termination date: 20140819 |
|
| EXPY | Termination of patent right or utility model |