CN204761762U - LED dimming control circuit - Google Patents
LED dimming control circuit Download PDFInfo
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- CN204761762U CN204761762U CN201520339840.0U CN201520339840U CN204761762U CN 204761762 U CN204761762 U CN 204761762U CN 201520339840 U CN201520339840 U CN 201520339840U CN 204761762 U CN204761762 U CN 204761762U
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- electric capacity
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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)
- Led Devices (AREA)
Abstract
The utility model discloses a LED dimming control circuit, including rectifier bridge T1, fuse FU, electric capacity C1 and inductance L1, fuse FU is connected to rectifier bridge T1's port 1, and the 220V alternating current is connected to fuse FU's the other end, rectifier bridge T1's 3 other ends of connecting the 220V alternating currents of port, and electric capacity C1 and inductance L1 are connected to rectifier bridge T1's port 2. The utility model discloses LED dimming control circuit has abandoned traditional transformer and has kept apart the module, adopts resonance circuit to substitute, has not only simplified circuit structure, makes output more stable in addition, uses IRS2530D as control chip simultaneously, has increased the integrated level of circuit, consequently has the advantage that simple structure, stable performance, cost of manufacture hang down.
Description
Technical field
The utility model relates to a kind of drive circuit, specifically a kind of LED adjusting control circuit.
Background technology
Power consumption is low, heat radiation lampet advantage is widely used in lighting apparatus because have for LED, and illumination is most important power mode in daily life, because the driving voltage of LED lamp is different, and it is higher to the requirement of voltage, easily because of overvoltage, the situation such as under-voltage and burning, therefore its drive circuit seems particularly important.Current most LED adjusting control circuit many uses transformer isolation mode, not only complex structure, cost are large compared with high, volume, and can produce peak voltage during transformer coil coupling, make to export unstable defect, therefore need to be improved.
Utility model content
The purpose of this utility model is to provide the LED adjusting control circuit that a kind of structure is simple, cost of manufacture is low, 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 adjusting control circuit, comprise rectifier bridge T1, fuse FU, electric capacity C1 and inductance L 1, the port one of described rectifier bridge T1 connects fuse FU, the other end of fuse FU connects 220V alternating current, the port 3 of rectifier bridge T1 connects the other end of 220V alternating current, the port 2 of rectifier bridge T1 connects electric capacity C1 and inductance L 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C7, resistance R6, resistance R8, the anode of diode D2, the port 4 of rectifier bridge T1, a stiff end of potentiometer RP1, the pin 2 of chip IC 1 and the source electrode of metal-oxide-semiconductor Q2, the other end contact resistance R1 of inductance L 1, the other end of electric capacity C2 and the drain electrode of metal-oxide-semiconductor Q1, the other end contact resistance R2 of resistance R1 and the negative electrode of diode D1, the other end of resistance R2 connects the other end of electric capacity C3, another stiff end of resistance R3 and potentiometer RP1, the other end of resistance R3 connects the other end of electric capacity 4 and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the other end of electric capacity C5, the sliding end of electric capacity C7 and potentiometer RP1, the pin 4 of chip IC 1 connects the other end of electric capacity C6, the other end of resistance R6 connects electric capacity C8, the other end of electric capacity C8 connects the pin 8 of chip IC 1, the pin 5 contact resistance R5 of chip IC 1, the other end of resistance R5 connects the grid of metal-oxide-semiconductor Q2, the pin 7 contact resistance R4 of chip IC 1, the other end of resistance R4 connects the grid of metal-oxide-semiconductor Q1, the pin 6 of chip IC 1 connects electric capacity C9, inductance L 2, the source electrode of metal-oxide-semiconductor Q1 and the drain electrode of metal-oxide-semiconductor Q2, the other end of electric capacity C9 connects the anode of diode D1 and the negative electrode of diode D2, the other end of inductance L 2 connects electric capacity C10, the other end of electric capacity C10 connects the port one of rectifier bridge T2, the port 2 of rectifier bridge T2 connects LED group H, the port 4 of rectifier bridge T2 connects the other end of LED group H, the negative electrode of diode D2 connects the anode of diode D1 and the other end of electric capacity C9, the port 3 contact resistance R7 of rectifier bridge T2 and resistance R8, the other end of resistance R7 connects the other end of electric capacity C7.
As preferred version of the present utility model: the model of described chip IC 1 is IRS2530D.
Compared with prior art, the beneficial effects of the utility model are: the utility model LED adjusting control circuit has abandoned traditional transformer isolation module, employing resonant circuit substitutes, not only simplify circuit structure, and make output more stable, use IRS2530D as control chip simultaneously, add the integrated level of circuit, therefore have that structure is simple, stable performance, advantage that cost of manufacture is low.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of LED adjusting 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, a kind of LED adjusting control circuit, comprise rectifier bridge T1, fuse FU, electric capacity C1 and inductance L 1, the port one of described rectifier bridge T1 connects fuse FU, the other end of fuse FU connects 220V alternating current, the port 3 of rectifier bridge T1 connects the other end of 220V alternating current, the port 2 of rectifier bridge T1 connects electric capacity C1 and inductance L 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C7, resistance R6, resistance R8, the anode of diode D2, the port 4 of rectifier bridge T1, a stiff end of potentiometer RP1, the pin 2 of chip IC 1 and the source electrode of metal-oxide-semiconductor Q2, the other end contact resistance R1 of inductance L 1, the other end of electric capacity C2 and the drain electrode of metal-oxide-semiconductor Q1, the other end contact resistance R2 of resistance R1 and the negative electrode of diode D1, the other end of resistance R2 connects the other end of electric capacity C3, another stiff end of resistance R3 and potentiometer RP1, the other end of resistance R3 connects the other end of electric capacity 4 and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the other end of electric capacity C5, the sliding end of electric capacity C7 and potentiometer RP1, the pin 4 of chip IC 1 connects the other end of electric capacity C6, the other end of resistance R6 connects electric capacity C8, the other end of electric capacity C8 connects the pin 8 of chip IC 1, the pin 5 contact resistance R5 of chip IC 1, the other end of resistance R5 connects the grid of metal-oxide-semiconductor Q2, the pin 7 contact resistance R4 of chip IC 1, the other end of resistance R4 connects the grid of metal-oxide-semiconductor Q1, the pin 6 of chip IC 1 connects electric capacity C9, inductance L 2, the source electrode of metal-oxide-semiconductor Q1 and the drain electrode of metal-oxide-semiconductor Q2, the other end of electric capacity C9 connects the anode of diode D1 and the negative electrode of diode D2, the other end of inductance L 2 connects electric capacity C10, the other end of electric capacity C10 connects the port one of rectifier bridge T2, the port 2 of rectifier bridge T2 connects LED group H, the port 4 of rectifier bridge T2 connects the other end of LED group H, the negative electrode of diode D2 connects the anode of diode D1 and the other end of electric capacity C9, the port 3 contact resistance R7 of rectifier bridge T2 and resistance R8, the other end of resistance R7 connects the other end of electric capacity C7.
The model of chip IC 1 is IRS2530D.
Operation principle of the present utility model is: because output current belongs to alternating current, therefore adds a full wave bridge rectifier in this circuit, makes electric current can flow through LED within each HF switch cycle.Alternating current detects the resistor R1 be still placed in bottom rectifier bridge T1 and between the pin 2 of chip IC 1 by carry out, and directly measures full-wave rectification LED current amplitude.Measurement result can be coupled in the pin 3 of chip IC 1 by resistor R2 and capacitor C3.The brightness adjustment control loop of chip IC 1 can regulate half bridge switching circuit continuously, and the amplitude of LED current is suitably regulated.If LED current declines, loop will reduce frequency, thus improves the gain of resonant tank, strengthens LED current.If LED current rises, loop will improve frequency, thus reduces the gain of resonant tank, weakens LED current.When AC line voltage imports first, the pin 1 of chip IC 1 can charge, and starts IC1.Output frequency, by the highest frequency of IC1, sweeps the resonance frequency dropping down onto the series connection L-C-LED resonant circuit be made up of inductance L 2, electric capacity C10 and LED group H always.Frequency scanning is responsible for by the capacitor C6 on pin 4.LED current increases along with the decline of frequency, and the amplitude of the AC signal on pin 3 is increased, until the valley of AC signal arrives pin 2.Then IC1 just enters light-modulating mode, and internal dimming loop comes into force.Light modulation loop can continuous regulation output frequency, and guarantee that the valley of the AC signal on pin 3 is held in pin 2, the amplitude preservation of LED current is constant.LED current is full-wave rectification, works in the doubled frequency of half-bridge mid point (pin 8 of chip IC 1).Based on the resonance of circuit, the waveform of LED current is sine curve.So just, current peak factor can be held in low-level, also can realize nominal LED effective value electric current without the need to excessive peak current.
Claims (2)
1. a LED adjusting control circuit, comprises rectifier bridge T1, fuse FU, electric capacity C1 and inductance L 1, it is characterized in that, the port one of described rectifier bridge T1 connects fuse FU, the other end of fuse FU connects 220V alternating current, the port 3 of rectifier bridge T1 connects the other end of 220V alternating current, the port 2 of rectifier bridge T1 connects electric capacity C1 and inductance L 1, the other end of electric capacity C1 connects electric capacity C2, electric capacity C3, electric capacity C4, electric capacity C5, electric capacity C7, resistance R6, resistance R8, the anode of diode D2, the port 4 of rectifier bridge T1, a stiff end of potentiometer RP1, the pin 2 of chip IC 1 and the source electrode of metal-oxide-semiconductor Q2, the other end contact resistance R1 of inductance L 1, the other end of electric capacity C2 and the drain electrode of metal-oxide-semiconductor Q1, the other end contact resistance R2 of resistance R1 and the negative electrode of diode D1, the other end of resistance R2 connects the other end of electric capacity C3, another stiff end of resistance R3 and potentiometer RP1, the other end of resistance R3 connects the other end of electric capacity 4 and the pin 1 of chip IC 1, the pin 3 of chip IC 1 connects the other end of electric capacity C5, the sliding end of electric capacity C7 and potentiometer RP1, the pin 4 of chip IC 1 connects the other end of electric capacity C6, the other end of resistance R6 connects electric capacity C8, the other end of electric capacity C8 connects the pin 8 of chip IC 1, the pin 5 contact resistance R5 of chip IC 1, the other end of resistance R5 connects the grid of metal-oxide-semiconductor Q2, the pin 7 contact resistance R4 of chip IC 1, the other end of resistance R4 connects the grid of metal-oxide-semiconductor Q1, the pin 6 of chip IC 1 connects electric capacity C9, inductance L 2, the source electrode of metal-oxide-semiconductor Q1 and the drain electrode of metal-oxide-semiconductor Q2, the other end of electric capacity C9 connects the anode of diode D1 and the negative electrode of diode D2, the other end of inductance L 2 connects electric capacity C10, the other end of electric capacity C10 connects the port one of rectifier bridge T2, the port 2 of rectifier bridge T2 connects LED group H, the port 4 of rectifier bridge T2 connects the other end of LED group H, the negative electrode of diode D2 connects the anode of diode D1 and the other end of electric capacity C9, the port 3 contact resistance R7 of rectifier bridge T2 and resistance R8, the other end of resistance R7 connects the other end of electric capacity C7.
2. a kind of LED adjusting control circuit according to claim 1, is characterized in that, the model of described chip IC 1 is IRS2530D.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339840.0U CN204761762U (en) | 2015-05-25 | 2015-05-25 | LED dimming control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520339840.0U CN204761762U (en) | 2015-05-25 | 2015-05-25 | LED dimming control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204761762U true CN204761762U (en) | 2015-11-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520339840.0U Expired - Fee Related CN204761762U (en) | 2015-05-25 | 2015-05-25 | LED dimming control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204761762U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151894A (en) * | 2016-08-19 | 2016-11-23 | 中节能晶和照明有限公司 | LED light unit |
-
2015
- 2015-05-25 CN CN201520339840.0U patent/CN204761762U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151894A (en) * | 2016-08-19 | 2016-11-23 | 中节能晶和照明有限公司 | LED light unit |
| CN106151894B (en) * | 2016-08-19 | 2023-04-28 | 中节能晶和科技有限公司 | LED optical unit |
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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: 20151111 Termination date: 20190525 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |