CN210202135U - Active consumption circuit with auxiliary winding control power supply - Google Patents
Active consumption circuit with auxiliary winding control power supply Download PDFInfo
- Publication number
- CN210202135U CN210202135U CN201920160481.0U CN201920160481U CN210202135U CN 210202135 U CN210202135 U CN 210202135U CN 201920160481 U CN201920160481 U CN 201920160481U CN 210202135 U CN210202135 U CN 210202135U
- Authority
- CN
- China
- Prior art keywords
- pin
- diode
- capacitor
- transformer
- driving chip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
-
- 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
Abstract
The utility model discloses an active consumption circuit with an auxiliary winding control power supply, which comprises a PFC unit, a FLYBACK unit, a driving chip and a dimming circuit unit; the PFC unit performs boost conversion on the control voltage, eliminates the influence of an excess current signal after dimming the signal, enters the FLYBACK unit for AC-DC conversion and then is output to a load end. The utility model discloses an active consumption circuit method has solved the area auxiliary winding power of adjusting luminance effectively, when adjusting luminance to 0, the problem that the surplus bright unable elimination of lamps and lanterns has solved the too big problem of loss when passive consumption simultaneously.
Description
Technical Field
The utility model relates to an optical signal control field particularly, relates to a take active consumption circuit of auxiliary winding control power, can take when adjusting luminance of auxiliary winding power of adjusting luminance is 0, thoroughly eliminates the afterglow of lamps and lanterns, has reduced the consume problem when passive consumption simultaneously.
Background
With the continuous improvement of the lighting requirements of the human society, the market of the lamp is rapidly developed. LED lamps are widely used in the lamp market for their high efficiency and energy saving. Whether on both sides of a road or in places such as office buildings, factories, markets, schools and the like, the most common lamps always have the figure of the LED lamp.
The core of the LED lamp is an LED driving power supply which is similar to the heart of a human being. The LED dimming power supply is one of LED driving power supplies, and is popular in the market because the LED dimming power supply can adjust the illumination brightness, create a light environment required by the LED dimming power supply and reduce the cost of electricity charges. When the dimming control power supply with the auxiliary winding is used for dimming with the output power of 0-100%, the LED lamp still has residual brightness even if the dimming is adjusted to 0. Specifically, the common dimming chip cannot adjust the brightness of the lamp by 0 to 100%. This is caused by the fact that the driving chip, which is supplied by the auxiliary winding, still needs an operating voltage when the dimming level is 0, and the circuit maintains its required operating voltage with a very low switching frequency, which further causes a very small induced current to appear in the secondary winding of the transformer.
To address this phenomenon, the current solution is to power up (dummy load) the output of the dimming power supply or put a power resistor at the input. The method for connecting the power supply output end with the dummy load comprises the following steps: when the dimming is 0, the output current flows through the dummy load, the LED lamp looks like being in an off state, and although the problem that the lamp still has the residual brightness when the dimming is 0 is solved, when the power supply does not need to dim the dimming to 0, the dummy load still consumes power, unnecessary power loss is caused, and the efficiency of the power supply is reduced. The same reason is that a power resistor is arranged at the input end of the power supply, and meanwhile, the problem that the light is still remained when the dimming is 0 is solved at the cost of power loss.
Therefore, there is a need for further improvement of the dimming control system with auxiliary winding, which can eliminate the residual light and reduce the damage of passive loss to the working circuit.
SUMMERY OF THE UTILITY MODEL
To the problem in the correlation technique, the utility model provides a take active consumption circuit of auxiliary winding control power supply to overcome the above-mentioned technical problem that current correlation technique exists.
The technical scheme of the utility model is realized like this:
an active consumption circuit with an auxiliary winding control power supply comprises a PFC unit, a FLYBACK unit and a drive chip U1, and is characterized by further comprising a dimming circuit unit;
the PFC unit is connected with a dimming port of the driving chip U1, so that the input voltage is subjected to buck-boost regulation; the FLYBACK unit is connected with a driving port of the driving chip U12, performs AC/DC conversion and outputs current to a load end; the dimming circuit unit is connected with a control port of the driving chip U1, and eliminates redundant voltage in the LED lamp by controlling the work of the active consumption circuit, so that the function of eliminating residual light is achieved.
The PFC unit comprises a fuse F1, a filter FL1, a capacitor C1, a capacitor C2, a transformer T1, a diode D1, a transistor Q1 and a resistor R1, wherein one end of the fuse F1 is connected with a voltage signal 220V, the other end of the fuse F1 is connected with a second pin of the filter FL1, a first pin of the filter FL1 is connected with a voltage signal AC, a third pin of the filter FL1 is connected with one end of the capacitor C1 and a fourth pin of the transformer T1, the other end of the capacitor C1 is connected with a fourth pin of the filter FL1 and a first pin of the transformer T1, a second pin of the transformer T1 is connected with an anode of the diode D1 and a collector of the transistor Q1, an emitter of the transistor Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the ground, and a cathode of the diode D1 is connected with one end of the capacitor C1, the other end of the capacitor C2 is grounded;
the FLYBACK unit comprises a transformer T3, a MOSFET Q2, a diode D2, a diode DS1, a diode DS2, a diode DS3, a resistor R2, a capacitor C3 and a capacitor C4, wherein a first pin of the transformer T3 is connected with one end of the capacitor C2 and a cathode of the diode D2, respectively, a second pin of the transformer T3 is connected with a D-pole of the MOSFET Q2, one end of the resistor R2 is connected with an S-pole of the MOSFET Q2, the other end of the resistor R2 is grounded, a fifth pin of the transformer T2 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with one end of the capacitor C2 and an anode of the diode DS2, a cathode of the diode DS2 is connected with an anode of the diode DS2, and a cathode of the other end of the capacitor C2 is connected with a cathode of the diode DS2, One end of the capacitor C4 is connected with the sixth pin of the transformer T3, and the other end of the capacitor C4 is grounded;
the first pin of the driving chip U1 is connected with the second pin of the driving chip U1, the third pin of the driving chip U1, the fifth pin of the driving chip U1, the sixth pin of the driving chip U1, the eighth pin of the driving chip U1, the ninth pin of the driving chip U1, the eleventh pin of the driving chip U1 and the fourteenth pin of the driving chip U1 are all open circuits, the seventh pin of the driving chip U1 is connected with the base of the triode Q1, and the tenth pin of the driving chip U1 is connected with the G pole of the MOSFET tube Q2.
Furthermore, the dimming circuit unit mainly comprises a bluetooth module and an active consumption circuit module, and under the control of the bluetooth module, the active consumption circuit consumes the redundant voltage in the working circuit to eliminate the residual light.
Further, the dimming circuit unit comprises an integrated chip FM1, a transformer T2, a diode D3, a capacitor C5, a transistor Q3, a resistor R3 and a bluetooth module, wherein a first pin of the integrated chip FM1 is respectively connected with a fourth pin of the filter FL1, the other end of the capacitor C1 and a first pin of the transformer T1, a second pin of the integrated chip FM1 is grounded, a fourth pin of the integrated chip FM1 is connected with a first pin of the transformer T2, a third pin of the integrated chip FM1 is connected with a second pin of the transformer T2, a third pin of the transformer T2 is connected with a positive electrode of the diode D3, a fourth pin of the transformer T2 is respectively connected with one end of the capacitor C5 and the first pin of the bluetooth module, and the other end of the capacitor C5 is respectively connected with a negative electrode of the diode D3 and a second pin of the bluetooth module, the fourth pin of bluetooth module with the fourth pin of driver chip U1 is connected, bluetooth module's third pin with triode Q3's base is connected, triode Q3's projecting pole with resistance R3's one end is connected, resistance R3's the other end ground connection, triode Q3's collecting electrode respectively with diode D2's negative pole, electric capacity C3's one end, diode DS 1's positive pole is connected.
Further, the diode DS1, the diode DS2 and the diode DS3 are LED lamps.
The utility model has the advantages that: on the premise of meeting the requirements of completely turning off the lamp and stabilizing the deep dimming, the conversion efficiency can be kept to the maximum extent; in addition, adding this active dissipation circuit to the output side winding can reduce the voltage withstand requirements of the switching transistor, making the solution cost effective.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic circuit diagram of an active consumption circuit with an auxiliary winding control power supply according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art all belong to the protection scope of the present invention.
According to the utility model discloses an embodiment provides a take active consumption circuit of auxiliary winding control power supply.
As shown in fig. 1, the active consumption circuit with an auxiliary winding control power supply according to the embodiment of the present invention is characterized by comprising a PFC unit, a FLYBACK unit and a driving chip U1, and further comprising a dimming circuit unit;
the PFC unit is connected with a dimming port of the driving chip U1, so that the input voltage is subjected to buck-boost regulation; the FLYBACK unit is connected with a driving port of the driving chip U12, performs AC/DC conversion and outputs current to a load end; the dimming circuit unit is connected with a control port of the driving chip U1, and eliminates redundant voltage in the LED lamp by controlling the work of the active consumption circuit, so that the function of eliminating residual light is achieved.
The PFC unit comprises a fuse F1, a filter FL1, a capacitor C1, a capacitor C2, a transformer T1, a diode D1, a transistor Q1 and a resistor R1, wherein one end of the fuse F1 is connected with a voltage signal 220V, the other end of the fuse F1 is connected with a second pin of the filter FL1, a first pin of the filter FL1 is connected with a voltage signal AC, a third pin of the filter FL1 is connected with one end of the capacitor C1 and a fourth pin of the transformer T1, the other end of the capacitor C1 is connected with a fourth pin of the filter FL1 and a first pin of the transformer T1, a second pin of the transformer T1 is connected with an anode of the diode D1 and a collector of the transistor Q1, an emitter of the transistor Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the ground, and a cathode of the diode D1 is connected with one end of the capacitor C1, the other end of the capacitor C2 is grounded;
the FLYBACK unit comprises a transformer T3, a MOSFET Q2, a diode D2, a diode DS1, a diode DS2, a diode DS3, a resistor R2, a capacitor C3 and a capacitor C4, wherein a first pin of the transformer T3 is connected with one end of the capacitor C2 and a cathode of the diode D2, respectively, a second pin of the transformer T3 is connected with a D-pole of the MOSFET Q2, one end of the resistor R2 is connected with an S-pole of the MOSFET Q2, the other end of the resistor R2 is grounded, a fifth pin of the transformer T2 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with one end of the capacitor C2 and an anode of the diode DS2, a cathode of the diode DS2 is connected with an anode of the diode DS2, and a cathode of the other end of the capacitor C2 is connected with a cathode of the diode DS2, One end of the capacitor C4 is connected with the sixth pin of the transformer T3, and the other end of the capacitor C4 is grounded;
the first pin of the driving chip U1 is connected with the second pin of the driving chip U1, the third pin of the driving chip U1, the fifth pin of the driving chip U1, the sixth pin of the driving chip U1, the eighth pin of the driving chip U1, the ninth pin of the driving chip U1, the eleventh pin of the driving chip U1 and the fourteenth pin of the driving chip U1 are all open circuits, the seventh pin of the driving chip U1 is connected with the base of the triode Q1, and the tenth pin of the driving chip U1 is connected with the G pole of the MOSFET tube Q2.
In one embodiment, the dimming circuit unit mainly comprises a bluetooth module and an active consumption circuit module, and under the control of the bluetooth module, the active consumption circuit consumes the redundant voltage in the working circuit to eliminate the residual light.
In one embodiment, the dimming circuit unit comprises an integrated chip FM1, a transformer T2, a diode D3, a capacitor C5, a transistor Q3, a resistor R3 and a bluetooth module, a first pin of the integrated chip FM1 is connected with a fourth pin of the filter FL1, the other end of the capacitor C1 and a first pin of the transformer T1 respectively, a second pin of the integrated chip FM1 is grounded, a fourth pin of the integrated chip FM1 is connected with the first pin of the transformer T2, a third pin of the integrated chip FM1 is connected with the second pin of the transformer T2, a third pin of the transformer T2 is connected with a positive electrode of the diode D3, a fourth pin of the transformer T2 is connected with one end of the capacitor C5 and the first pin of the bluetooth module respectively, and the other end of the capacitor C5 is connected with a negative electrode of the diode D3 and the second pin of the bluetooth module respectively, the fourth pin of bluetooth module with the fourth pin of driver chip U1 is connected, bluetooth module's third pin with triode Q3's base is connected, triode Q3's projecting pole with resistance R3's one end is connected, resistance R3's the other end ground connection, triode Q3's collecting electrode respectively with diode D2's negative pole, electric capacity C3's one end, diode DS 1's positive pole is connected.
In one embodiment, the diode DS1, the diode DS2, and the diode DS3 are LED lamps.
The working principle is as follows: when the dimming circuit unit receives an external dimming command, the dimming circuit unit converts the received command into a voltage corresponding to the output power, and the driving chip controls the switching frequency of the MOS tube according to the voltage of the dimming port, so that the output power of the LED power supply is controlled to be adjusted from 0% to 100%.
In the active consumption circuit module, the resistor R3 consumes redundant voltage, the triode Q3 is used for reducing the withstand voltage requirement of the switching transistor, and the problem that the lamp still has residual brightness when the power supply is adjusted to be 0 is perfectly solved on the premise of not consuming the power of the power supply.
The bluetooth module has two functions: one is to control the regulation of the power supply output power from 0 to 100 percent, and the other is to control the timely switching of the switching tube in the active consumption circuit module. When the dimming is deep, the power of the power supply is less than or equal to 10%, the Bluetooth module controls the switching transistor to be turned on, and the active consumption circuit module is equivalent to a dummy load, so that the problem of residual brightness of the lamp when the dimming is 0 is solved; on the contrary, when the power of the power supply is larger than 10%, the bluetooth module controls the switching transistor to be turned off, and the active consumption circuit module is equivalent to an open circuit, so that the active consumption circuit does not consume power.
To sum up, with the help of the above technical scheme of the utility model, through designing the active consumption circuit of taking auxiliary winding control power, utilize simple and practical's circuit structure to accomplish the effect of eliminating the surplus light of lamps and lanterns, can reduce the power consumption again when satisfying the demand of adjusting luminance, accomplished cost-economy, built good luminous environment.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. An active consumption circuit with an auxiliary winding control power supply comprises a PFC unit, a FLYBACK unit and a drive chip U1, and is characterized by further comprising a dimming circuit unit;
the PFC unit is connected with a dimming port of the driving chip U1, so that the input voltage is subjected to buck-boost regulation; the FLYBACK unit is connected with a driving port of the driving chip U12, performs AC/DC conversion and outputs current to a load end; the dimming circuit unit is connected with a control port of the driving chip U1, and eliminates redundant voltage in the LED lamp by controlling the work of the active consumption circuit, so that the function of eliminating residual light is achieved.
2. Active consumer circuit with auxiliary winding control supply according to claim 1,
the PFC unit comprises a fuse F1, a filter FL1, a capacitor C1, a capacitor C2, a transformer T1, a diode D1, a transistor Q1 and a resistor R1, wherein one end of the fuse F1 is connected with a voltage signal 220V, the other end of the fuse F1 is connected with a second pin of the filter FL1, a first pin of the filter FL1 is connected with a voltage signal AC, a third pin of the filter FL1 is connected with one end of the capacitor C1 and a fourth pin of the transformer T1, the other end of the capacitor C1 is connected with a fourth pin of the filter FL1 and a first pin of the transformer T1, a second pin of the transformer T1 is connected with an anode of the diode D1 and a collector of the transistor Q1, an emitter of the transistor Q1 is connected with one end of the resistor R1, the other end of the resistor R1 is connected with the ground, and a cathode of the diode D1 is connected with one end of the capacitor C1, the other end of the capacitor C2 is grounded;
the FLYBACK unit comprises a transformer T3, a MOSFET Q2, a diode D2, a diode DS1, a diode DS2, a diode DS3, a resistor R2, a capacitor C3 and a capacitor C4, wherein a first pin of the transformer T3 is connected with one end of the capacitor C2 and a cathode of the diode D2, respectively, a second pin of the transformer T3 is connected with a D-pole of the MOSFET Q2, one end of the resistor R2 is connected with an S-pole of the MOSFET Q2, the other end of the resistor R2 is grounded, a fifth pin of the transformer T2 is connected with an anode of the diode D2, a cathode of the diode D2 is connected with one end of the capacitor C2 and an anode of the diode DS2, a cathode of the diode DS2 is connected with an anode of the diode DS2, and a cathode of the other end of the capacitor C2 is connected with a cathode of the diode DS2, One end of the capacitor C4 is connected with the sixth pin of the transformer T3, and the other end of the capacitor C4 is grounded;
the first pin of the driving chip U1 is connected with the second pin of the driving chip U1, the third pin of the driving chip U1, the fifth pin of the driving chip U1, the sixth pin of the driving chip U1, the eighth pin of the driving chip U1, the ninth pin of the driving chip U1, the eleventh pin of the driving chip U1 and the fourteenth pin of the driving chip U1 are all open circuits, the seventh pin of the driving chip U1 is connected with the base of the triode Q1, and the tenth pin of the driving chip U1 is connected with the G pole of the MOSFET tube Q2.
3. The active consumption circuit with the auxiliary winding control power supply of claim 2, wherein the dimming circuit unit mainly comprises a bluetooth module and an active consumption circuit module, and under the control of the bluetooth module, the active consumption circuit consumes redundant voltage in the working circuit to eliminate redundant light;
the dimming circuit unit comprises an integrated chip FM1, a transformer T2, a diode D3, a capacitor C5, a triode Q3, a resistor R3 and a Bluetooth module, wherein a first pin of the integrated chip FM1 is respectively connected with a fourth pin of the filter FL1, the other end of the capacitor C1 and a first pin of the transformer T1, a second pin of the integrated chip FM1 is grounded, a fourth pin of the integrated chip FM1 is connected with the first pin of the transformer T2, a third pin of the integrated chip FM1 is connected with the second pin of the transformer T2, a third pin of the transformer T2 is connected with the anode of the diode D3, a fourth pin of the transformer T2 is respectively connected with one end of the capacitor C5 and the first pin of the Bluetooth module, and the other end of the capacitor C5 is respectively connected with the cathode of the diode D3 and the second pin of the Bluetooth module, the fourth pin of bluetooth module with the fourth pin of driver chip U1 is connected, bluetooth module's third pin with triode Q3's base is connected, triode Q3's projecting pole with resistance R3's one end is connected, resistance R3's the other end ground connection, triode Q3's collecting electrode respectively with diode D2's negative pole, electric capacity C3's one end, diode DS 1's positive pole is connected.
4. The active consumption circuit with auxiliary winding control power supply of claim 2, wherein the diode DS1, the diode DS2 and the diode DS3 are all LED lamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920160481.0U CN210202135U (en) | 2019-01-30 | 2019-01-30 | Active consumption circuit with auxiliary winding control power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920160481.0U CN210202135U (en) | 2019-01-30 | 2019-01-30 | Active consumption circuit with auxiliary winding control power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210202135U true CN210202135U (en) | 2020-03-27 |
Family
ID=69879415
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920160481.0U Active CN210202135U (en) | 2019-01-30 | 2019-01-30 | Active consumption circuit with auxiliary winding control power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210202135U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116685020A (en) * | 2023-05-11 | 2023-09-01 | 无锡市益明光电有限公司 | Two-in-one dimming LED driving circuit |
-
2019
- 2019-01-30 CN CN201920160481.0U patent/CN210202135U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116685020A (en) * | 2023-05-11 | 2023-09-01 | 无锡市益明光电有限公司 | Two-in-one dimming LED driving circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101227779B (en) | Insulation type general use illumination LED driving circuit | |
| CN104703358B (en) | Wide-voltage-range LED (light emitting diode) lamp switching and dimming driving circuit and LED lamp dimming control system | |
| CN102685989A (en) | PWM (Pulse-Width modulation) dimming method and circuit of LED constant-current source concentratively powered by high-voltage direct current | |
| CN203761633U (en) | Energy-saving LED traffic light with long service life | |
| CN201174804Y (en) | Separation type general illuminating LED driving circuit | |
| CN204465970U (en) | A kind of LED street lamp drive circuit based on HV9931 | |
| CN210202135U (en) | Active consumption circuit with auxiliary winding control power supply | |
| CN204191008U (en) | A kind of simple and easy high PFC framework controllable silicon light modulation LED drive power | |
| CN104981078A (en) | LED music lamp based on Bluetooth control | |
| Pinto et al. | High-power-factor street lighting system to supply LEDs without energy consumption during the peak load time | |
| CN201094166Y (en) | LED drive circuit | |
| CN216852445U (en) | Non-isolated non-strobe switch color temperature adjusting power supply | |
| CN216673339U (en) | LED power supply controller control circuit of intelligence degree of depth adjusting luminance mixing of colors | |
| CN205726506U (en) | A kind of Switching Power Supply feedback control circuit and single-stage PFC high-efficiency constant-flow power driving circuit | |
| CN212588555U (en) | LED driving power supply | |
| CN104378888A (en) | Simple silicon-controlled dimming LED driving power supply with high-PFC structure | |
| CN204948408U (en) | A kind of LED music lamp based on Bluetooth control | |
| CN114678830A (en) | Low-power-consumption dimming circuit and power supply method thereof | |
| CN211557574U (en) | High-power-factor non-stroboscopic constant-current driving circuit and LED bulb lamp | |
| CN104735837A (en) | LED street lamp power supply without power frequency ripples and with APFC function | |
| US10805996B1 (en) | Dial segmented dimming circuit | |
| CN202587529U (en) | Pulse width modulation (PWM) dimming circuit for high-voltage direct current centralized power supply light emitting diode (LED) constant current source | |
| CN203632931U (en) | Protection circuit for driving LED light source COB series combination with switching power supply | |
| CN201601859U (en) | Non-isolated LED driving circuit | |
| CN206237643U (en) | A kind of linear constant current controls LED |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |