CN204810626U - No stroboscopic control circuit system based on LED constant current drive - Google Patents
No stroboscopic control circuit system based on LED constant current drive Download PDFInfo
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- CN204810626U CN204810626U CN201520542286.6U CN201520542286U CN204810626U CN 204810626 U CN204810626 U CN 204810626U CN 201520542286 U CN201520542286 U CN 201520542286U CN 204810626 U CN204810626 U CN 204810626U
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- resistance
- control circuit
- npn transistor
- constant current
- circuit
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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)
Abstract
The utility model discloses a no stroboscopic control circuit system based on LED constant current drive, include: EMC filter circuit, ac - DC converter circuit, PWM constant current control circuit, no stroboscopic control circuit and load, wherein, no stroboscopic control circuit comprises resistance R12, resistance R13, resistance R14, NPN transistor Q2 and NPN transistor Q3, the utility model discloses in no stroboscopic control circuit system based on LED constant current drive, it is through increasing no stroboscopic control circuit, let it realize that LED does not have the stroboscopic function, send into ac - DC converter circuit through the NULL power behind EMC filter circuit, constant current control circuit is sent into to electric current behind ac - DC converter circuit, constant current control circuit's output current inserts the load, realize through no stroboscopic control circuit that LED does not have the stroboscopic function again, the production cost is low, high reliability and high work efficiency, realized not having stroboscopic control to the load, and protect LED to avoid high electric current simultaneously and damage.
Description
Technical field
The utility model relates to a kind of control circuit, specifically a kind of based on LED constant current drive without frequent flashing control Circuits System.
Background technology
Current LED drive power on the market, usual High Power Factor (PF >=0.92) driving power has stroboscopic problem, and only has about 0.5-0.6 without stroboscopic driving power power factor, can not meet industrial lighting demand.People easily produces visual fatigue under being in strobelight for a long time, affects operating efficiency, increases work people and to make mistakes probability.
Recent segment chip manufacturer develop without stroboscopic chip solve High Power Factor without stroboscopic problem, but because of chip controls highly sensitive, in application, circuit easily produces self-oscillation, and light fixture can not normally be used; In addition, chip price is expensive accounts for PCB position greatly, is not easy to practical application design, so market utilization rate is lower.Thus existing LED drive power also can meet the demand of Vehicles Collected from Market.
Utility model content
Utility model object: the purpose of this utility model is to solve the deficiencies in the prior art, provide a kind of based on LED constant current drive without frequent flashing control Circuits System.
Technical scheme: in order to realize above object, described in the utility model a kind of based on LED constant current drive without frequent flashing control Circuits System, comprise: without frequent flashing control circuit, described without frequent flashing control electricity routing resistance R12, resistance R13, resistance R14, NPN transistor Q2 and NPN transistor Q3 is formed, described resistance R12 one end connects load positive pole, the other end is connected with the base stage of NPN transistor Q2, the collector electrode of described NPN transistor Q3 is connected with NPN transistor Q2 base stage, its base stage respectively with the emitter of NPN transistor Q2, resistance R13 is connected with resistance R14, and its grounded emitter, described resistance R13 is connected with the emitter of NPN transistor Q3 with the other end of resistance R14.Described in the utility model a kind of based on LED constant current drive without frequent flashing control Circuits System, after EMC filter circuit, ac-dc converter circuit is sent into by alternating current input power supplying, electric current after ac-dc converter circuit sends into constant-current control circuit, constant-current control circuit output current access load, then through without frequent flashing control circuit realiration LED without stroboscopic function.The utility model cost is low, and operating efficiency is high, achieves to load without frequent flashing control, and protects LED from high circuit damage simultaneously.
Described in the utility model based on LED constant current drive without frequent flashing control Circuits System, also comprise EMC filter circuit, ac-dc converter circuit, PWM constant-current control circuit and load, the two ends of described EMC filter circuit are connected with the input of power supply and ac-dc converter circuit respectively, the output of described ac-dc converter circuit is connected with the input of PWM constant-current control circuit, the output of described PWM constant-current control circuit is connected with without frequent flashing control circuit input end, is describedly connected with load without frequent flashing control circuit output end.
EMC filter circuit described in the utility model is made up of adjustable resistance R1, safety electric capacity CX1, safety electric capacity CX2, inductance L 1, inductance L 2, resistance R1 and resistance R2, the two ends of described adjustable resistance R1 are connected with inductance L 1 and inductance L 2 respectively, and described resistance R1 is connected with safety electric capacity CX1 and safety electric capacity CX2 respectively with the two ends of inductance L 1.
NPN transistor Q2 described in the utility model can adopt NPN transistor or have identical function metal-oxide-semiconductor, the element allowing this product use in the fabrication process has selectivity, and then has better met the demand of client.
Resistance R13 described in the utility model and resistance R14 is adjustable resistance, and it can regulate resistance according to the size of load, can play a very good protection to brave son.
Beneficial effect: described in the utility model a kind of based on LED constant current drive without frequent flashing control Circuits System, have the following advantages:
Described in the utility model a kind of based on LED constant current drive without frequent flashing control Circuits System, it is by increasing without frequent flashing control circuit, it is allowed to realize LED without stroboscopic function, in the process used, after EMC filter circuit, ac-dc converter circuit is sent into by alternating current input power supplying, electric current after ac-dc converter circuit sends into constant-current control circuit, the output current access load of constant-current control circuit, again through without frequent flashing control circuit realiration without strobe effect, in the process of design, adopt discrete component to combine, the structure of whole circuit is simple, flexible design, and use process in circuit stability, cost also than prior art in cost is low, also greatly will improve this product competitiveness of product in market simultaneously, and then it also can win more profit for enterprise by while the demand better meeting numerous clients, thus realize the situation of doulbe-sides' victory.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation without frequent flashing control circuit in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the utility model further.
Embodiment
As depicted in figs. 1 and 2 a kind of based on LED constant current drive without frequent flashing control Circuits System, comprise: EMC filter circuit 1, ac-dc converter circuit 2, PWM constant-current control circuit 3, without frequent flashing control circuit 4 and load 5, wherein, to be describedly made up of resistance R12, resistance R13, resistance R14, NPN transistor Q2 and NPN transistor Q3 without frequent flashing control circuit 4.
The annexation of above-mentioned each components and parts is as follows:
The two ends of described EMC filter circuit 1 are connected with the input of power supply and ac-dc converter circuit 2 respectively, the output of described ac-dc converter circuit 2 is connected with the input of PWM constant-current control circuit 3, the output of described PWM constant-current control circuit 3 is connected with without frequent flashing control circuit 4 input, is describedly connected with load (5) without frequent flashing control circuit 4 output, described NPN transistor Q2 can adopt NPN transistor or have identical function metal-oxide-semiconductor, described resistance R12 one end connects load positive pole, the other end is connected with the base stage of NPN transistor Q2, the collector electrode of described NPN transistor Q3 is connected with NPN transistor Q2 base stage, its base stage respectively with the emitter of NPN transistor Q2, resistance R13 is connected with resistance R14, and its grounded emitter, described resistance R13 is connected with the emitter of NPN transistor Q3 with the other end of resistance R14, and, described resistance R13 and resistance R14 is adjustable resistance, it can regulate resistance according to the size of load 5.
EMC filter circuit 1 described in the present embodiment is made up of adjustable resistance R1, safety electric capacity CX1, safety electric capacity CX2, inductance L 1, inductance L 2, resistance R1 and resistance R2, the two ends of described adjustable resistance R1 are connected with inductance L 1 and inductance L 2 respectively, and described resistance R1 is connected with safety electric capacity CX1 and safety electric capacity CX2 respectively with the two ends of inductance L 1.
Described in the present embodiment based on LED constant current drive without frequent flashing control Circuits System, its concrete operation principle is as follows:
Alternating current input power supplying sends into ac-dc converter circuit after EMC filter circuit; electric current after ac-dc converter circuit sends into constant-current control circuit; the output current access load of constant-current control circuit; again through without frequent flashing control circuit realiration LED without stroboscopic function; thus achieving without frequent flashing control, its cost is low, and operating efficiency is high; achieve to load without frequent flashing control, and protect LED from high circuit damage simultaneously.
Embodiment is only not used in restriction scope of the present utility model for illustration of the utility model, after having read the utility model, the amendment of those skilled in the art to the various equivalent form of value of the present utility model has all fallen within the application's claims limited range.
Claims (5)
1. one kind based on LED constant current drive without frequent flashing control Circuits System, it is characterized in that: comprising: without frequent flashing control circuit (4), described without frequent flashing control circuit (4) by resistance R12, resistance R13, resistance R14, NPN transistor Q2 and NPN transistor Q3 is formed, described resistance R12 one end connects load positive pole, the other end is connected with the base stage of NPN transistor Q2, the collector electrode of described NPN transistor Q3 is connected with NPN transistor Q2 base stage, its base stage respectively with the emitter of NPN transistor Q2, resistance R13 is connected with resistance R14, and its grounded emitter, described resistance R13 is connected with the emitter of NPN transistor Q3 with the other end of resistance R14.
2. according to claim 1 a kind of based on LED constant current drive without frequent flashing control Circuits System, it is characterized in that: also comprise EMC filter circuit (1), ac-dc converter circuit (2), PWM constant-current control circuit (3) and load (5), the two ends of described EMC filter circuit (1) are connected with the input of power supply and ac-dc converter circuit (2) respectively, the output of described ac-dc converter circuit (2) is connected with the input of PWM constant-current control circuit (3), the output of described PWM constant-current control circuit (3) is connected with without frequent flashing control circuit (4) input, describedly to be connected with load (5) without frequent flashing control circuit (4) output.
3. according to claim 1 a kind of based on LED constant current drive without frequent flashing control Circuits System, it is characterized in that: described EMC filter circuit (1) is made up of adjustable resistance R1, safety electric capacity CX1, safety electric capacity CX2, inductance L 1, inductance L 2, resistance R1 and resistance R2, the two ends of described adjustable resistance R1 are connected with inductance L 1 and inductance L 2 respectively, and described resistance R1 is connected with safety electric capacity CX1 and safety electric capacity CX2 respectively with the two ends of inductance L 1.
4. according to claim 1 a kind of based on LED constant current drive without frequent flashing control Circuits System, it is characterized in that: described NPN transistor Q2 can adopt NPN transistor or have identical function metal-oxide-semiconductor.
5. according to claim 1 a kind of based on LED constant current drive without frequent flashing control Circuits System, it is characterized in that: described resistance R13 and resistance R14 is adjustable resistance, it can regulate resistance according to the size of load (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520542286.6U CN204810626U (en) | 2015-07-24 | 2015-07-24 | No stroboscopic control circuit system based on LED constant current drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520542286.6U CN204810626U (en) | 2015-07-24 | 2015-07-24 | No stroboscopic control circuit system based on LED constant current drive |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204810626U true CN204810626U (en) | 2015-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520542286.6U Expired - Fee Related CN204810626U (en) | 2015-07-24 | 2015-07-24 | No stroboscopic control circuit system based on LED constant current drive |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204810626U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328049A (en) * | 2016-08-25 | 2017-01-11 | 成都东创精英科技有限公司 | Energy-saving light control system used for outdoor LED large display screen |
| CN109788600A (en) * | 2017-11-14 | 2019-05-21 | 美芯晟科技（北京）有限公司 | A kind of circuit for eliminating current ripples, system and method |
-
2015
- 2015-07-24 CN CN201520542286.6U patent/CN204810626U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106328049A (en) * | 2016-08-25 | 2017-01-11 | 成都东创精英科技有限公司 | Energy-saving light control system used for outdoor LED large display screen |
| CN109788600A (en) * | 2017-11-14 | 2019-05-21 | 美芯晟科技（北京）有限公司 | A kind of circuit for eliminating current ripples, system and method |
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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: 20151125 Termination date: 20160724 |