CN203387738U - Current-limiting LED (light-emitting diode) light source module - Google Patents
Current-limiting LED (light-emitting diode) light source module Download PDFInfo
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- CN203387738U CN203387738U CN201320458357.5U CN201320458357U CN203387738U CN 203387738 U CN203387738 U CN 203387738U CN 201320458357 U CN201320458357 U CN 201320458357U CN 203387738 U CN203387738 U CN 203387738U
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
The utility model relates to an LED (light-emitting diode) lighting device, and particularly relates to a current-limiting LED light source module. The module comprises a mains supply input end, wherein the mains supply input end is connected to an AC-DC conversion circuit, the output end of the AC-DC conversion circuit is connected to a single-stage or multi-stage triode current-limiting circuit, and the single-stage or multi-stage triode current-limiting circuit is serially connected to an LED chip group formed by sequentially connected LED chips in series. The current-limiting LED light source module absorbs residual voltage exceeding LED series voltage through connecting a plurality of LEDs in series and forming a current-limiting circuit through the single-stage or multi-stage parallelly connected triodes, reduces the load of each of the triodes and reduces heat generated by devices while providing constant-current output. Meanwhile, the current-limiting LED light source module reduces impacts imposed on the surrounding LED chips, and prolongs the service life of circuit devices and light-emitting devices.
Description
Technical field
The utility model relates to a kind of LED lighting apparatus, especially a kind of current limliting LED light source module.
Background technology
From the LED light source module, drive, LED drives and can be divided into constant voltage driving and constant current driving.Constant current drives and generally can be divided into linear constant current and Switching Power Supply constant current.Wherein, linear constant current is simple with circuit structure, and component number is few, in the LED light source module drives, is widely adopted, and existing linear constant current circuit is general adopts three kinds of mode current limlitings, and 1, the resistance-capacitance depressurization current limliting; 2, independent resistance current limliting; 3, independent current regulator diode.But, in above-mentioned three kinds of modes, the resistance-capacitance depressurization current limliting exists volume large, the problem that the electric capacity resistance to pressure is poor, stability in use is bad, and electric capacity is easily breakdown; The power down appearance gets on the independent tangible capacitance-resistance voltage reduction circuit of resistance current limliting basis, but because resistance just plays merely metering function, can't be regulated electric current, and its caloric value is large, easily that peripheral devices is worked under hot environment, generally, all more than 110-120 ℃, reduced the useful life of peripheral devices; Separately the current regulator diode current-limiting circuit can only work under DC condition, can not be in communication environment work, and also the withstand voltage properties of diode is also poor, still has the problem of the reliability of using.
Summary of the invention
The utility model provides a kind of and reduce the load of current limliting line device in effective current limliting, reduces the multistage current limliting LED light source module of device heating amount.
To achieve these goals, the utility model adopts following technical scheme:
This module comprises a mains electricity input end, described mains electricity input end connects an ac-dc converter circuit, it is characterized in that: described ac-dc converter circuit output connects single-stage or multistage triode current-limiting circuit, the LED chip group that described single-stage or multistage triode current-limiting circuit serial connection are comprised of the LED chip of once connecting, described every grade of triode current-limiting circuit comprises the first triode and the second triode, a shunt resistance circuit in parallel between the collector electrode of described the first triode and base stage, the emitter of described the first triode connects the base stage of the second triode, the base stage of described the first triode connects the collector electrode of the second triode, the base stage of described the second triode divider resistance of connecting, the series circuit of the base stage of the second triode and the 3rd resistance with export after the emitter of the second triode is in parallel.
Preferably, the parallel circuits that described shunt resistance circuit is comprised of the first resistance and the second resistance.
Preferably, formation plural parallel stage triode current-limiting circuit parallel with one another between described multistage triode current-limiting circuit.
Preferably, described plural parallel stage triode current-limiting circuit is located at LED chip group front end.
Preferably, described plural parallel stage triode current-limiting circuit is located at LED chip group stage casing.
Preferably, described plural parallel stage triode current-limiting circuit is located at the LED chip group end.
Preferably, described multistage triode current-limiting circuit is connected successively.
Preferably, the LED chip group by the multistage interval be located at the multistage triode current-limiting circuit of connecting between LED string form.
Preferably, be provided with anti-surge circuit between described mains electricity input end and ac-dc converter circuit.
Preferably, described ac-dc converter circuit is a bridge rectifier.
Owing to having adopted such scheme, current limliting LED light source module of the present utility model is connected by plurality of LEDs, and the current-limiting circuit that the triode that passes through single-stage or plural parallel stage forms absorbs over the residual voltage after the LED series voltage, when constant current output is provided, reduce the load of each triode, reduce the heating of device, reduce the impact on peripheral LED chip simultaneously, improved the useful life of circuit devcie and luminescent device.
The accompanying drawing explanation
The electrical block diagram of Fig. 1 the utility model the first embodiment;
Fig. 2 is the device heating discharge curve figure of the utility model the first embodiment;
Fig. 3 is the electrical block diagram of the utility model the second embodiment;
Fig. 4 is the electrical block diagram of the utility model the 3rd embodiment;
Fig. 5 is the electrical block diagram of the utility model the 4th embodiment;
Fig. 6 is the device heating discharge curve figure of the utility model the 4th embodiment;
Fig. 7 is the electrical block diagram of the utility model the 5th embodiment.
In figure: mains electricity input end CN, ac-dc converter circuit BR;
Multistage triode current-limiting circuit 1, LED chip group 2;
The first triode Q1, the second triode Q2, the first resistance R 1, the second resistance R 2, the 3rd resistance R 3.
Embodiment
As shown in Figure 1, the current limliting LED light source module that a single-stage triode current-limiting circuit is provided of the first embodiment of the present utility model, this module comprises a mains electricity input end, described mains electricity input end connects an ac-dc converter circuit, described ac-dc converter circuit output connects single-stage triode current-limiting circuit, the model of the core core device of ac-dc converter circuit is MB10S 1A/1000V MBS encapsulation, the model of the first triode Q1 device used is D13003 1.5A/400V TO-252 encapsulation, the model of the second triode Q2 device used is 2S9013 0.5A/40V SOT-23 encapsulation, the resistance of the first resistance R 1 and the second resistance R 2 is Chip-R 1206 11.2K Ω 5% 1/4W, the resistance of the 3rd resistance R 3 is Chip-R 1,206 11 Ω 1% 1/4W.In circuit working, when input voltage at alternating current 220V the time, the core core device MB10S of ac-dc converter circuit converts alternating current to the direct current of 220V, the direct current of 220V is added in the current-limiting circuit that is comprised of triode and the two ends of LED light source module series circuit, the voltage V at LED light source module two ends
f=3.2V * 60=192V, the drive current of LED used is 50mA, the voltage V at triode current-limiting circuit two ends
q=220-V
f=220-192=28V, provide base current I for the first triode Q1 after the first resistance R 1 and the second resistance R 2 parallel connections
b=V
q÷ R=28 ÷ (11200 ÷ 2)=5mA, pressure drop conducting VR3=I * R=0.05 that the second triode Q2 utilizes electric current to flow through the 3rd resistance R 3 to produce * 11=0.55V, triode in theory base stage be greater than emitter 0.7V just can conducting, but while in fact using as long as 0.5V just can conducting.The conducting of the second triode Q2 makes the electric current that flows into the first triode Q1 base stage reduce, and both reach balance and make the electric current stable output.The LED chip group that described single-stage or multistage single-stage triode current-limiting circuit serial connection are comprised of the LED chip of once connecting, described every grade of triode current-limiting circuit comprises the first triode and the second triode, a shunt resistance circuit in parallel between the collector electrode of described the first triode and base stage, the emitter of described the first triode connects the base stage of the second triode, the base stage of described the first triode connects the collector electrode of the second triode, the base stage of described the second triode divider resistance of connecting, the series circuit of the base stage of the second triode and the 3rd resistance with export after the emitter of the second triode is in parallel.During work, in circuit, the caloric value of each device as shown in Figure 2.
The current limliting LED light source module of this first embodiment goes on the less light source module of current limliting load, the quantity of the LED chip of the LED chip group series connection for example connected is multiplied by the rated voltage of single led chip and accesses in the more approaching situation of voltage ratio, use that can be stable, but when the current limliting load is larger, the caloric value of triode can promote, in order to solve problems, embodiment of the present utility model further proposes following examples:
The current-limiting circuit that the second embodiment of the present utility model provides a kind of multistage triode current-limiting circuit to be in parallel as a whole, its circuit structure as shown in Figure 3, comprise a mains electricity input end, described mains electricity input end connects an ac-dc converter circuit, described ac-dc converter circuit output connects the plural parallel stage triode current-limiting circuit be formed in parallel by a plurality of single-stage triode current-limiting circuits, the model of the core core device of ac-dc converter circuit is MB10S 1A/1000V MBS encapsulation, the model of the first triode Q1 device used is D13003 1.5A/400V TO-252 encapsulation, the model of the second triode Q2 device used is 2S9013 0.5A/40V SOT-23 encapsulation, the resistance of the first resistance R 1 and the second resistance R 2 is Chip-R 1206 11.2K Ω 5% 1/4W, the resistance of the 3rd resistance R 3 is Chip-R 1,206 32.4 Ω 1% 1/4W.In circuit working, when input voltage at alternating current 220V the time, the core core device MB10S of ac-dc converter circuit converts alternating current to the direct current of 220V, the direct current of 220V is added in the current-limiting circuit that is comprised of triode and the two ends of LED light source module series circuit, the voltage V at LED light source module two ends
f=3.2V * 60=192V, the drive current of LED used is 50mA, the voltage V at triode current-limiting circuit two ends
q=220-V
f=220-192=28V, provide base current I for the first triode Q1 after the first resistance R 1 and the second resistance R 2 parallel connections
b=V
q÷ R=28 ÷ (11200 ÷ 2)=5mA, three current limliting branch roads are arranged in figure, the electric current that every road current limliting branch road flow through is 50mA ÷ 3 ≈ 16.7 mA, pressure drop conducting VR3=I * R=0.0167 that the second triode Q2 utilizes electric current to flow through the 3rd resistance R 3 to produce * 32.4=0.54V, triode in theory base stage be greater than emitter 0.7V just can conducting, but while in fact using as long as 0.5V just can conducting.The conducting of the second triode Q2 makes the electric current that flows into the first triode Q1 base stage reduce, and both reach balance and make the electric current stable output.Described each single-stage triode current-limiting circuit comprises respectively the first triode and the second triode, a shunt resistance circuit in parallel between the collector electrode of described the first triode and base stage, the emitter of described the first triode connects the base stage of the second triode, the base stage of described the first triode connects the collector electrode of the second triode, the base stage of described the second triode divider resistance of connecting, the series circuit of the base stage of the second triode and the 3rd resistance with export after the emitter of the second triode is in parallel, the output of plural parallel stage triode current-limiting circuit connects the LED chip group of the LED chip composition of series connection again.
Owing to realizing the effect of current limliting in the second embodiment by multistage triode current-limiting circuit parallel with one another, progression in parallel can be set according to the difference of load, use flexibility and reliability more, and by after the parallel connection of multistage triode current-limiting circuit, triode current-limiting circuits at different levels can the average load total current, further reduce the load of triode current-limiting circuits at different levels, reduced the device heating amount of triode current-limiting circuits at different levels.
But in the second embodiment, plural parallel stage triode current-limiting circuit is arranged at the front end of the LED chip group that the LED chip of series connection forms, so at first electric current passes through plural parallel stage triode current-limiting circuit, the device of electric current to plural parallel stage triode current-limiting circuit, especially the impact of the first triode is larger, so in using actual, the first triode should be selected triode with a higher standard.
In order to reduce the requirement to parts selection, reduce the cost of circuit, the 3rd embodiment and the 4th embodiment are further proposed on the basis of the second embodiment.
As shown in Figure 4, the 3rd embodiment of the present utility model is on the basis of the second embodiment, plural parallel stage triode current-limiting circuit is arranged to the stage casing of the LED chip group that the LED chip of series connection forms, the model of the core core device of ac-dc converter circuit is MB10S 1A/1000V MBS encapsulation, the model of the first triode Q1 device used is D13003 1.5A/400V TO-252 encapsulation, the model of the second triode Q2 device used is 2S9013 0.5A/40V SOT-23 encapsulation, the resistance of the first resistance R 1 and the second resistance R 2 is Chip-R 1206 11.2K Ω 5% 1/4W, the resistance of the 3rd resistance R 3 is Chip-R 1,206 32.4 Ω 1% 1/4W.In circuit working, when input voltage at alternating current 220V the time, the core core device MB10S of ac-dc converter circuit converts alternating current to the direct current of 220V, the direct current of 220V is added in LED module series circuit 1 and the current-limiting circuit of triode composition and the two ends of LED light source module series circuit 2, the voltage V at LED light source module two ends
f=3.2V * (N1+N2)=3.2V * 60=192V, the drive current of LED used is 50mA, the voltage V at triode current-limiting circuit two ends
q=220-V
f=220-192=28V, provide base current I for the first triode Q1 after the first resistance R 1 and the second resistance R 2 parallel connections
b=V
q÷ R=28 ÷ (11200 ÷ 2)=5mA, three current limliting branch roads are arranged in figure, the electric current that every road current limliting branch road flow through is 50mA ÷ 3 ≈ 16.7 mA, pressure drop conducting VR3=I * R=0.0167 that the second triode Q2 utilizes electric current to flow through the 3rd resistance R 3 to produce * 32.4=0.54V, triode in theory base stage be greater than emitter 0.7V just can conducting, but while in fact using as long as 0.5V just can conducting.The conducting of the second triode Q2 makes the electric current that flows into the first triode Q1 base stage reduce, and both reach balance and make the electric current stable output.By directly connecting the LED chip of first paragraph series connection after ac-dc converter circuit output, then first paragraph series LED chip is connected to the input of plural parallel stage triode current-limiting circuit, then connects the LED chip of second segment series connection at the output of plural parallel stage triode current-limiting circuit.
As shown in Figure 5, the 4th embodiment of the present utility model is on the basis of the second embodiment, plural parallel stage triode current-limiting circuit is arranged to the end of the LED group that the LED chip of series connection forms, and the LED chip group formed by the LED chip that is directly connected to series connection after ac-dc converter circuit output, then connecting plural parallel stage triode current-limiting circuit.The model of the core core device of ac-dc converter circuit is MB10S 1A/1000V MBS encapsulation, the model of the first triode Q1 device used is D13003 1.5A/400V TO-252 encapsulation, the model of the second triode Q2 device used is 2S9013 0.5A/40V SOT-23 encapsulation, the resistance of the first resistance R 1 and the second resistance R 2 is Chip-R 1206 11.2K Ω 5% 1/4W, and the resistance of the 3rd resistance R 3 is Chip-R 1,206 32.4 Ω 1% 1/4W.In circuit working, when input voltage at alternating current 220V the time, the core core device MB10S of ac-dc converter circuit converts alternating current to the direct current of 220V, the direct current of 220V is added in LED module series circuit 1 and the current-limiting circuit of triode composition and the two ends of LED light source module series circuit 2, the voltage V at LED light source module two ends
f=3.2V * 60=192V, the drive current of LED used is 50mA, the voltage V at triode current-limiting circuit two ends
q=220-V
f=220-192=28V, provide base current I for the first triode Q1 after the first resistance R 1 and the second resistance R 2 parallel connections
b=V
q÷ R=28 ÷ (11200 ÷ 2)=5mA, three current limliting branch roads are arranged in figure, the electric current that every road current limliting branch road flow through is 50mA ÷ 3 ≈ 16.7 mA, pressure drop conducting VR3=I * R=0.0167 that the second triode Q2 utilizes electric current to flow through the 3rd resistance R 3 to produce * 32.4=0.54V, triode in theory base stage be greater than emitter 0.7V just can conducting, but while in fact using as long as 0.5V just can conducting.The conducting of the second triode Q2 makes the electric current that flows into the first triode Q1 base stage reduce, and both reach balance and make the electric current stable output.
In above-mentioned the 3rd embodiment and the 4th embodiment, by plural parallel stage triode current-limiting circuit rearmounted stage casing and end to the LED chip group, after making electric current by ac-dc converter circuit output, first pass through the LED chip of the series connection of a part or whole part, arrive again plural parallel stage triode current-limiting circuit, greatly reduce the impact of electric current to plural parallel stage triode current-limiting circuit, reduced the load of device in plural parallel stage triode current-limiting circuit, make the type selecting of device more extensive, reduced requirement on devices, also reduced circuit cost, and principle can be released thus, the 4th embodiment is optimum embodiment.The heating situation curve chart that Fig. 6 is the 4th embodiment when work during each, as seen from the figure,
Except the plural parallel stage triode current-limiting circuit that above-mentioned the second embodiment to the four embodiment propose, the 5th embodiment of the present utility model also proposes a kind of plural serial stage triode current-limiting circuit: as shown in Figure 7, in the 5th embodiment, described single-stage triode current-limiting circuit is connected successively, described each single-stage triode current-limiting circuit comprises respectively the first triode and the second triode, a shunt resistance circuit in parallel between the collector electrode of described the first triode and base stage, the emitter of described the first triode connects the base stage of the second triode, the base stage of described the first triode connects the collector electrode of the second triode, the base stage of described the second triode divider resistance of connecting, the series circuit of the base stage of the second triode and the 3rd resistance with export after the emitter of the second triode is in parallel, the output of plural parallel stage triode current-limiting circuit connects the LED chip group of the LED chip composition of series connection again.The LED chip group by the multistage interval be located at the multistage triode current-limiting circuit of connecting between LED string form.During work, by plural serial stage triode current-limiting circuit, carry out the total limit flow of spread loads, reduce the load of every one-level triode current limliting, improve the reliability of using, reduce caloric value, increase the service life.
In addition, in order to make the current limliting LED light source module in above-mentioned each embodiment of the utility model can antisurge, be provided with anti-surge circuit between the mains electricity input end of above-mentioned each embodiment and ac-dc converter circuit, anti-surge circuit comprises a 10D471K type Anti-surging piezo-resistance.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or directly or indirectly be used in other relevant technical fields, all in like manner be included in scope of patent protection of the present utility model.
Claims (10)
1. a current limliting LED light source module, comprise a mains electricity input end, described mains electricity input end connects an ac-dc converter circuit, it is characterized in that: described ac-dc converter circuit output connects single-stage or multistage triode current-limiting circuit, the LED chip group that described single-stage or multistage triode current-limiting circuit serial connection are comprised of the LED chip of once connecting, described every grade of triode current-limiting circuit comprises the first triode and the second triode, a shunt resistance circuit in parallel between the collector electrode of described the first triode and base stage, the emitter of described the first triode connects the base stage of the second triode, the base stage of described the first triode connects the collector electrode of the second triode, the base stage of described the second triode divider resistance of connecting, the series circuit of the base stage of the second triode and the 3rd resistance with export after the emitter of the second triode is in parallel.
2. current limliting LED light source module as claimed in claim 1, is characterized in that: the parallel circuits that described shunt resistance circuit is comprised of the first resistance and the second resistance.
3. current limliting LED light source module as claimed in claim 2, is characterized in that: formation plural parallel stage triode current-limiting circuit parallel with one another between described multistage triode current-limiting circuit.
4. current limliting LED light source module as claimed in claim 3, it is characterized in that: described plural parallel stage triode current-limiting circuit is located at LED chip group front end.
5. current limliting LED light source module as claimed in claim 3, it is characterized in that: described plural parallel stage triode current-limiting circuit is located at LED chip group stage casing.
6. current limliting LED light source module as claimed in claim 3, it is characterized in that: described plural parallel stage triode current-limiting circuit is located at the LED chip group end.
7. current limliting LED light source module as claimed in claim 2, it is characterized in that: described multistage triode current-limiting circuit is connected successively.
8. current limliting LED light source module as claimed in claim 7 is characterized in that: the LED chip group by the multistage interval be located at the multistage triode current-limiting circuit of connecting between the LED string form.
9. current limliting LED light source module as claimed in claim 2, is characterized in that: between described mains electricity input end and ac-dc converter circuit, be provided with anti-surge circuit.
10. current limliting LED light source module as claimed in claim 2, it is characterized in that: described ac-dc converter circuit is a bridge rectifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201320458357.5U CN203387738U (en) | 2013-07-30 | 2013-07-30 | Current-limiting LED (light-emitting diode) light source module |
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| CN201320458357.5U CN203387738U (en) | 2013-07-30 | 2013-07-30 | Current-limiting LED (light-emitting diode) light source module |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080238A (en) * | 2013-07-30 | 2014-10-01 | 广州市九佛电器有限公司 | Current-limiting LED light source module |
| CN113054087A (en) * | 2021-03-19 | 2021-06-29 | 幂光新材料科技（上海）有限公司 | LED lamp bead packaging mode and circuit structure for improving electro-optic conversion efficiency |
| CN113225924A (en) * | 2021-05-10 | 2021-08-06 | 幂光新材料科技（上海）有限公司 | Manufacturing method of high-luminous-efficiency LED lamp |
-
2013
- 2013-07-30 CN CN201320458357.5U patent/CN203387738U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104080238A (en) * | 2013-07-30 | 2014-10-01 | 广州市九佛电器有限公司 | Current-limiting LED light source module |
| CN113054087A (en) * | 2021-03-19 | 2021-06-29 | 幂光新材料科技（上海）有限公司 | LED lamp bead packaging mode and circuit structure for improving electro-optic conversion efficiency |
| CN113225924A (en) * | 2021-05-10 | 2021-08-06 | 幂光新材料科技（上海）有限公司 | Manufacturing method of high-luminous-efficiency LED lamp |
| WO2022236880A1 (en) * | 2021-05-10 | 2022-11-17 | 幂光新材料科技（上海）有限公司 | Manufacturing method for high-light efficiency led lamp |
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