CN205142628U - Multi -functional LED safety power supply circuit - Google Patents
Multi -functional LED safety power supply circuit Download PDFInfo
- Publication number
- CN205142628U CN205142628U CN201520923518.2U CN201520923518U CN205142628U CN 205142628 U CN205142628 U CN 205142628U CN 201520923518 U CN201520923518 U CN 201520923518U CN 205142628 U CN205142628 U CN 205142628U
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- electric capacity
- triode
- resistance
- diode
- rectifier bridge
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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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- Circuit Arrangement For Electric Light Sources In General (AREA)
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Abstract
The utility model discloses a multi -functional LED safety power supply circuit, including transformer W, rectifier bridge T, resistance R1 and diode D1, the 220V alternating current is connected respectively at transformer W's winding N1's both ends, rectifier bridge T's port 1 and transient voltage suppression diode DW are connected to transformer W's winding N2's one end, rectifier bridge T's the port 3 and transient voltage suppression diode DW's the other end are connected to transformer W's winding N2's the other end, rectifier bridge T's port 2 connecting resistance R1, electric capacity C1 and diode D1's positive pole, electric capacity C2 is connected to diode D1's negative pole, resistance R3 and LED banks H. The utility model discloses multi -functional LED safety power supply circuit simple structure, components and parts are few, no chip structure, and with low costs, small, interference immunity is strong, and consequently the function that has soft start, invariable output current simultaneously and prevent impulse current has the various advantage with the stable performance of function.
Description
Technical field
The utility model relates to a kind of LED power, specifically a kind of Multifunctional LED safety power supply circuit.
Background technology
LED is acknowledged as green forth generation light source, is a kind of solid cold light source, has the plurality of advantages such as efficient, life-span length, safety and environmental protection, volume are little, high reliability, fast response time.Reach same illuminating effect at present; the power consumption of LED is approximately 1/10 of incandescent lamp; 1/2 of fluorescent lamp; LED power circuit is concerning most important LED; current most of LED lamp still uses common Power supply; LED easily causes the heat dissipation capacity of light-emitting diode too high in the moment switched on power because impulse current is excessive, thus burns LED lamp, and the LED power that minority has defencive function also exists function singleness, poor, the baroque shortcoming of protected effect.
Utility model content
The purpose of this utility model is to provide a kind of Multifunctional LED safety power supply circuit, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of Multifunctional LED safety power supply circuit, comprises transformer W, rectifier bridge T, resistance R1 and diode D1, the two ends of the winding N1 of described transformer W connect 220V alternating current respectively, one end of the winding N2 of transformer W connects port one and the transient voltage suppressor diode DW of rectifier bridge T, the other end of the winding N2 of transformer W connects the port 3 of rectifier bridge T and the other end of transient voltage suppressor diode DW, the port 2 contact resistance R1 of rectifier bridge T, the anode of electric capacity C1 and diode D1, the negative electrode of diode D1 connects electric capacity C2, the other end contact resistance R3 of resistance R3 and LED group H, resistance R1 and the base stage of triode V3, the other end of the other end contact resistance R3 of electric capacity C1, resistance R4, electric capacity C3, the collector electrode of triode V3, the collector electrode of triode V2, the anode of three end adjustable reference source U1 and the port 4 of rectifier bridge T, the emitter of triode V3 connects the other end of electric capacity C3 and the base stage of triode V2, the other end of the emitter contact resistance R3 of triode V2, electric capacity C4, the base stage of triode V1 and the negative electrode of three end adjustable reference source U1, the other end of LED group H connects the collector electrode of electric capacity C5 and triode V1, and the emitter of triode V1 connects the other end of electric capacity C5, the other end of constant volume C4, the other end of resistance R4 and the reference pole of three end adjustable reference source U1.
As preferred version of the present utility model: the model of described three end adjustable reference source U1 is TL431.
Compared with prior art, the beneficial effects of the utility model are: the utility model Multifunctional LED safety power supply circuit structure is simple, components and parts are few, chipless structure, cost is low, volume is little, strong interference immunity, there is the function of soft start, constant output current and impulse-current-proof simultaneously, therefore there is the advantage of diverse in function and stable performance.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of Multifunctional LED safety power supply circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, a kind of Multifunctional LED safety power supply circuit, comprise transformer W, rectifier bridge T, resistance R1 and diode D1, the two ends of the winding N1 of described transformer W connect 220V alternating current respectively, one end of the winding N2 of transformer W connects port one and the transient voltage suppressor diode DW of rectifier bridge T, the other end of the winding N2 of transformer W connects the port 3 of rectifier bridge T and the other end of transient voltage suppressor diode DW, the port 2 contact resistance R1 of rectifier bridge T, the anode of electric capacity C1 and diode D1, the negative electrode of diode D1 connects electric capacity C2, resistance R3 and LED group H, the other end contact resistance R3 of resistance R1 and the base stage of triode V3, the other end of the other end contact resistance R3 of electric capacity C1, resistance R4, electric capacity C3, the collector electrode of triode V3, the collector electrode of triode V2, the anode of three end adjustable reference source U1 and the port 4 of rectifier bridge T, the emitter of triode V3 connects the other end of electric capacity C3 and the base stage of triode V2, the other end of the emitter contact resistance R3 of triode V2, electric capacity C4, the base stage of triode V1 and the negative electrode of three end adjustable reference source U1, the other end of LED group H connects the collector electrode of electric capacity C5 and triode V1, the emitter of triode V1 connects the other end of electric capacity C5, the other end of constant volume C4, the other end of resistance R4 and the reference pole of three end adjustable reference source U1.
The model of three end adjustable reference source U1 is TL431.
Operation principle of the present utility model is: soft start principle: soft starting circuit is made up of V2, R3, C3 etc.When just switching on power, C3 is equivalent to short circuit, power supply is tied through the be of R3, V2, C3 to ground, V2 saturation conduction, A point is pulled to electronegative potential, and V1 ends because not having base current, and LED group H is not luminous.After charging after a while, C3 both end voltage slowly raises, and V2 base current reduces until end gradually, and the current potential of A point can slowly raise, and V1 also can follow conducting gradually, and LED group H is just slowly luminous, completes soft start-up process.
Anti-impact circuit principle: surge voltage is from two aspects, and one is when just switching on power, even if there is the existence of soft starting circuit, LED two ends still exist moment impact, the flash of light that this phenomenon can send by observing LED finds.At LED two ends and on can effectively absorb this impact after C5.
Another kind of impact is not only incoming call or just after power remove but also when horse back opens, because C3 both end voltage can not be suddenlyd change, soft starting circuit will lose efficacy at once after having a power failure suddenly when circuit normally works.Therefore, add the circuit be made up of V3, R1, R2, C1 etc., for C3 provides bleed off path, like this, even if instant cut-off, V3 also can saturation conduction, is fallen by the voltage bleed off on C3, thus ensures the normal work of circuit.
Stabilizing output current principle: constant-current circuit is made up of V1, U1, R3 and R4 etc.When causing the electric current flowing through H increase or reduce for a certain reason, the voltage drop at sampling resistor R4 two ends also and then raises or reduces, and the input terminal voltage of U1 also changes thereupon, thus the current potential of control V1 base stage, the current constant keeping flow through LED group H is constant.
Claims (2)
1. a Multifunctional LED safety power supply circuit, comprise transformer W, rectifier bridge T, resistance R1 and diode D1, it is characterized in that, the two ends of the winding N1 of described transformer W connect 220V alternating current respectively, one end of the winding N2 of transformer W connects port one and the transient voltage suppressor diode DW of rectifier bridge T, the other end of the winding N2 of transformer W connects the port 3 of rectifier bridge T and the other end of transient voltage suppressor diode DW, the port 2 contact resistance R1 of rectifier bridge T, the anode of electric capacity C1 and diode D1, the negative electrode of diode D1 connects electric capacity C2, resistance R3 and LED group H, the other end contact resistance R3 of resistance R1 and the base stage of triode V3, the other end of the other end contact resistance R3 of electric capacity C1, resistance R4, electric capacity C3, the collector electrode of triode V3, the collector electrode of triode V2, the anode of three end adjustable reference source U1 and the port 4 of rectifier bridge T, the emitter of triode V3 connects the other end of electric capacity C3 and the base stage of triode V2, the other end of the emitter contact resistance R3 of triode V2, electric capacity C4, the base stage of triode V1 and the negative electrode of three end adjustable reference source U1, the other end of LED group H connects the collector electrode of electric capacity C5 and triode V1, the emitter of triode V1 connects the other end of electric capacity C5, the other end of constant volume C4, the other end of resistance R4 and the reference pole of three end adjustable reference source U1.
2. according to a kind of Multifunctional LED safety power supply circuit according to claim 1, it is characterized in that, the model of described three end adjustable reference source U1 is TL431.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520923518.2U CN205142628U (en) | 2015-11-19 | 2015-11-19 | Multi -functional LED safety power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520923518.2U CN205142628U (en) | 2015-11-19 | 2015-11-19 | Multi -functional LED safety power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205142628U true CN205142628U (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520923518.2U Expired - Fee Related CN205142628U (en) | 2015-11-19 | 2015-11-19 | Multi -functional LED safety power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205142628U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998150A (en) * | 2017-04-14 | 2017-08-01 | 济南浪潮高新科技投资发展有限公司 | A kind of constant-current source and implementation method suppressed based on transient state with soft start |
-
2015
- 2015-11-19 CN CN201520923518.2U patent/CN205142628U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106998150A (en) * | 2017-04-14 | 2017-08-01 | 济南浪潮高新科技投资发展有限公司 | A kind of constant-current source and implementation method suppressed based on transient state with soft start |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160406 Termination date: 20161119 |