CN204929325U - LED control circuit - Google Patents
LED control circuit Download PDFInfo
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- CN204929325U CN204929325U CN201520527499.1U CN201520527499U CN204929325U CN 204929325 U CN204929325 U CN 204929325U CN 201520527499 U CN201520527499 U CN 201520527499U CN 204929325 U CN204929325 U CN 204929325U
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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 LED control circuit, including chip U1, opto -coupler U2, rectifier bridge Q, electric capacity C1, resistance R1, transformer T and diode D1, rectifier bridge Q pin 1 is with rectifier bridge Q pin 3 and connect 220V alternating current both ends respectively. The utility model discloses LED control circuit is through using integrated control chip U1, and design suitable connected peripheral circuit, 90V-264V make input 220V voltage when being undulant, still, keep the within range of output voltage at 5V 5%, the constant voltage, the constant current is effectual, adopt optical coupling isolation's mode in addition, the stability and the interference killing feature of circuit have also been increased, simple structure of the circuit, and small in size, the production cost is low, long service lifetime, especially adapted miniwatt LED.
Description
Technical field
The utility model relates to a kind of LED, specifically a kind of LED control circuit.
Background technology
LED drive power is that power supply supply is converted to specific electric current and voltage with the power supply changeover device of driving LED luminescence, under normal circumstances: the input of LED drive power comprises high pressure industrial frequency AC (i.e. civil power), low-voltage direct, high voltage direct current, low-voltage high-frequency interchange (output as electronic transformer) etc.
By type of drive
(1) electric current that constant current mode: a, constant-current drive circuit export is constant, and the direct voltage exported changes within the specific limits along with varying in size of load resistance, and load resistance is little, and output voltage is just low, and load resistance is larger, and output voltage is also higher; Load short circuits is not afraid of by b, constant-current circuit, but forbids load to be opened a way completely.C, constant-current drive circuit driving LED are ideal, but price is higher comparatively speaking.D, should note used maximumly bearing electric current and magnitude of voltage, which limit the usefulness the usage quantity of LED;
(2) type voltage regulation: a, after the parameters in voltage stabilizing circuit is determined, the voltage of output is fixing, and the electric current exported changes along with the increase and decrease of load; B, voltage stabilizing circuit are not afraid of load open circuit, but forbid load dead short circuit.C, with voltage stabilizing drive circuit driving LED, often to need to add that suitable resistive square can make often to go here and there LED display brightness average for string; The voltage variations affect that d, brightness can come by rectification.
The structure of existing LED power circuit is comparatively complicated, and manufacturing cost is high, and constant current effect is bad, causes the drive circuit life-span lower.
Utility model content
The purpose of this utility model is to provide a kind of LED control 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 LED control circuit, comprises chip U1, optocoupler U2, rectifier bridge Q, electric capacity C1, resistance R1, transformer T and diode D1, described rectifier bridge Q pin 1 and rectifier bridge Q pin 3 be connected 220V alternating current two ends respectively, rectifier bridge Q pin 4 ground connection, rectifier bridge Q pin 2 connects ground capacity C1 and inductance L 1 respectively, and inductance L 1 other end connects ground capacity C2 respectively, resistance R1, resistance R5, resistance R2, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D1 positive pole respectively, chip U1 pin 5, resistance R6 and earth resistance R7, diode D1 negative pole is the contact resistance R2 other end and the electric capacity C3 other end respectively, the described resistance R1 other end connects one end of diode D2 negative pole and optocoupler U2 output respectively, the other end of optocoupler U2 output connects chip U1 pin 6 and ground capacity C9 respectively, the described resistance R5 other end is the contact resistance R6 other end and chip U1 pin 3 respectively, described diode D2 positive pole is connection transformer T neutral earthing compensator L4 and electric capacity C7 respectively, and the electric capacity C7 other end is contact resistance R8 respectively, one end of optocoupler U2 importation, electric capacity C8, electric capacity C5, electric capacity C6, resistance R4 and transformer T coil L3, the transformer T coil L3 other end is contact resistance R3 and diode D3 positive pole respectively, and the resistance R3 other end connects electric capacity C4, and the electric capacity C4 other end connects diode D3 negative pole respectively, the electric capacity C5 other end, the electric capacity C6 other end, the resistance R4 other end and LED positive pole, the described resistance R8 other end connects LED negative pole and resistance R9 respectively, and the resistance R9 other end connects the other end and the electric capacity C8 other end of optocoupler U2 importation respectively, and described chip U1 model is RM3252.
As the utility model further scheme: described optocoupler U1 adopts PC817.
Compared with prior art, the beneficial effects of the utility model are: the utility model LED control circuit is by using integrating control chip U1, and design suitable connected peripheral circuit, make input 220V voltage when 90V ~ 264V fluctuates, still keep output voltage in the scope of 5V ± 5%, constant voltage, constant current are effective, adopt the mode of light-coupled isolation in addition, too increase stability and the antijamming capability of circuit, circuit structure is simple, and volume is little, low cost of manufacture, long service life, is very applicable to low-power LED.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED control 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, in the utility model embodiment, a kind of LED control circuit, comprises chip U1, optocoupler U2, rectifier bridge Q, electric capacity C1, resistance R1, transformer T and diode D1, rectifier bridge Q pin 1 and rectifier bridge Q pin 3 be connected 220V alternating current two ends respectively, rectifier bridge Q pin 4 ground connection, rectifier bridge Q pin 2 connects ground capacity C1 and inductance L 1 respectively, and inductance L 1 other end connects ground capacity C2 respectively, resistance R1, resistance R5, resistance R2, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D1 positive pole respectively, chip U1 pin 5, resistance R6 and earth resistance R7, diode D1 negative pole is the contact resistance R2 other end and the electric capacity C3 other end respectively, the resistance R1 other end connects one end of diode D2 negative pole and optocoupler U2 output respectively, the other end of optocoupler U2 output connects chip U1 pin 6 and ground capacity C9 respectively, the resistance R5 other end is the contact resistance R6 other end and chip U1 pin 3 respectively, diode D2 positive pole is connection transformer T neutral earthing compensator L4 and electric capacity C7 respectively, and the electric capacity C7 other end is contact resistance R8 respectively, one end of optocoupler U2 importation, electric capacity C8, electric capacity C5, electric capacity C6, resistance R4 and transformer T coil L3, the transformer T coil L3 other end is contact resistance R3 and diode D3 positive pole respectively, and the resistance R3 other end connects electric capacity C4, and the electric capacity C4 other end connects diode D3 negative pole respectively, the electric capacity C5 other end, the electric capacity C6 other end, the resistance R4 other end and LED positive pole, the resistance R8 other end connects LED negative pole and resistance R9 respectively, and the resistance R9 other end connects the other end and the electric capacity C8 other end of optocoupler U2 importation respectively, and chip U1 model is RM3252.
Optocoupler U1 adopts PC817.
Operation principle of the present utility model is: refer to Fig. 1, 220V alternating current is after rectifier bridge Q rectification, deliver to transformer T coil L4 side, after transformer T coil L4 mutual inductance, electric current enters optocoupler U2 importation, optocoupler U2 conducting, control voltage is provided to chip U1, chip U1 exports the voltage of a constant current, and by connected peripheral components, voltage is stablized, feed back to transformer T coil L2, make in transformer T coil L2, to obtain stable voltage input, thus make transformer T coil L3 sense the electric current of stable voltage stable output, for driving low-power LED.
To sum up, described drive circuit is by using integrating control chip U1, and design suitable connected peripheral circuit, make input 220V voltage when 90V ~ 264V fluctuates, still keep output voltage in the scope of 5V ± 5%, constant voltage, constant current are effective, and circuit structure is simple, volume is little, low cost of manufacture, long service life, is very applicable to low-power LED.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.Any Reference numeral in claim should be considered as the claim involved by limiting.
In addition, be to be understood that, although this specification is described according to execution mode, but not each execution mode only comprises an independently technical scheme, this narrating mode of specification is only for clarity sake, those skilled in the art should by specification integrally, and the technical scheme in each embodiment also through appropriately combined, can form other execution modes that it will be appreciated by those skilled in the art that.
Claims (2)
1. a LED control circuit, comprises chip U1, optocoupler U2, rectifier bridge Q, electric capacity C1, resistance R1, transformer T and diode D1, it is characterized in that, described rectifier bridge Q pin 1 and rectifier bridge Q pin 3 be connected 220V alternating current two ends respectively, rectifier bridge Q pin 4 ground connection, rectifier bridge Q pin 2 connects ground capacity C1 and inductance L 1 respectively, and inductance L 1 other end connects ground capacity C2 respectively, resistance R1, resistance R5, resistance R2, electric capacity C3 and transformer T coil L2, the transformer T coil L2 other end connects diode D1 positive pole respectively, chip U1 pin 5, resistance R6 and earth resistance R7, diode D1 negative pole is the contact resistance R2 other end and the electric capacity C3 other end respectively, the described resistance R1 other end connects one end of diode D2 negative pole and optocoupler U2 output respectively, the other end of optocoupler U2 output connects chip U1 pin 6 and ground capacity C9 respectively, the described resistance R5 other end is the contact resistance R6 other end and chip U1 pin 3 respectively, described diode D2 positive pole is connection transformer T neutral earthing compensator L4 and electric capacity C7 respectively, and the electric capacity C7 other end is contact resistance R8 respectively, one end of optocoupler U2 importation, electric capacity C8, electric capacity C5, electric capacity C6, resistance R4 and transformer T coil L3, the transformer T coil L3 other end is contact resistance R3 and diode D3 positive pole respectively, and the resistance R3 other end connects electric capacity C4, and the electric capacity C4 other end connects diode D3 negative pole respectively, the electric capacity C5 other end, the electric capacity C6 other end, the resistance R4 other end and LED positive pole, the described resistance R8 other end connects LED negative pole and resistance R9 respectively, and the resistance R9 other end connects the other end and the electric capacity C8 other end of optocoupler U2 importation respectively, and described chip U1 model is RM3252.
2. LED control circuit according to claim 1, is characterized in that, described optocoupler U1 adopts PC817.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527499.1U CN204929325U (en) | 2015-07-20 | 2015-07-20 | LED control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520527499.1U CN204929325U (en) | 2015-07-20 | 2015-07-20 | LED control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204929325U true CN204929325U (en) | 2015-12-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520527499.1U Expired - Fee Related CN204929325U (en) | 2015-07-20 | 2015-07-20 | LED control circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204929325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332389A (en) * | 2018-04-12 | 2018-07-27 | 济南鲁晶半导体有限公司 | A kind of peculiar smell observation circuit of semiconductor workshop and equipment |
-
2015
- 2015-07-20 CN CN201520527499.1U patent/CN204929325U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332389A (en) * | 2018-04-12 | 2018-07-27 | 济南鲁晶半导体有限公司 | A kind of peculiar smell observation circuit of semiconductor workshop and equipment |
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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: 20151230 Termination date: 20170720 |