CN213662012U - LED lighting driving circuit - Google Patents
LED lighting driving circuit Download PDFInfo
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- CN213662012U CN213662012U CN202022199490.6U CN202022199490U CN213662012U CN 213662012 U CN213662012 U CN 213662012U CN 202022199490 U CN202022199490 U CN 202022199490U CN 213662012 U CN213662012 U CN 213662012U
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Abstract
The utility model provides a LED lighting drive circuit, this LED lighting drive circuit are applied to lighting drive technical field, include: the device comprises a main processing circuit, a bridge rectifier circuit, a switching power supply circuit, a color temperature switching circuit, a double toggle switch circuit and a signal conversion circuit; the bridge rectifier circuit is used for externally connecting alternating current and is connected with the switching power supply circuit; the switch power supply circuit is connected with the color temperature switching circuit and the signal conversion circuit; the signal conversion circuit is used for being externally connected with a dimmer and is connected with the main processing circuit; the double toggle switch circuit is connected with the main processing circuit, and the main processing circuit is connected with the color temperature switching circuit; the color temperature switching circuit is used for externally connecting a light source load. The utility model discloses can realize the comprehensive regulation of colour temperature and lighting power.
Description
Technical Field
The utility model belongs to the technical field of lighting drive, more specifically say, relate to a LED lighting drive circuit.
Background
Along with the continuous development of social economy, the intelligent demand of electronic products is increasing day by day.
In the existing LED lighting product, a user desires to adjust both the color temperature and the power of the LED lighting product, and therefore, how to provide a comprehensive LED lighting driving circuit to achieve comprehensive adjustment of the color temperature and the lighting power becomes a problem to be solved by those skilled in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a LED lighting drive circuit, this LED lighting drive circuit can realize the comprehensive regulation of colour temperature and lighting power.
In order to achieve the above object, the utility model provides a LED lighting driving circuit, this LED lighting driving circuit includes:
the device comprises a main processing circuit, a bridge rectifier circuit, a switching power supply circuit, a color temperature switching circuit, a double toggle switch circuit and a signal conversion circuit;
the signal input end of the bridge rectifier circuit is used for externally connecting alternating current, and the signal output end of the bridge rectifier circuit is connected with the first input end of the switching power supply circuit;
the signal output end of the switching power supply circuit is connected with the first input end of the color temperature switching circuit and the first input end of the signal conversion circuit;
the second input end of the signal conversion circuit is used for being externally connected with a dimmer, and the signal output end of the signal conversion circuit is connected with the first input end of the main processing circuit;
the double toggle switch circuit is connected with the second input end of the main processing circuit, the first output end of the main processing circuit is connected with the second input end of the switch power supply circuit, and the second output end of the main processing circuit is connected with the second input end of the color temperature switching circuit;
and a first input end and a signal output end of the color temperature switching circuit are used for externally connecting a light source load.
Optionally, the bridge rectifier circuit comprises an alternating current input unit and a rectifier unit;
the signal input end of the alternating current input unit is used for externally connecting alternating current, the signal output end of the alternating current input unit is connected with the signal input end of the rectifying unit, and the signal output end of the rectifying unit is connected with the second input end of the switching power supply circuit.
Optionally, the signal conversion circuit includes a voltage conversion unit and a voltage output unit;
the signal input end of the voltage conversion unit is used for being externally connected with a 0-10V dimmer, the first output end of the voltage conversion unit is connected with the first input end of the voltage output unit, and the second output end of the voltage conversion unit and the signal output end of the voltage output unit form the signal output end of the signal conversion circuit;
and the second input end of the voltage output unit is connected with the signal output end of the switching power supply circuit.
Optionally, the second output end of the main processing circuit includes a cold color PWM signal output end and a warm color PWM signal output end, and the color temperature switching circuit includes a cold color circuit unit and a warm color circuit unit connected in parallel;
the first connecting point formed by connecting the cold color circuit unit and the warm color circuit unit in parallel is connected with a protective ground; a second connection point formed by connecting the cold color circuit unit and the warm color circuit unit in parallel is a first input end of the color temperature switching circuit;
a cold color PWM signal output end of the main processing circuit is connected with a signal input end of the cold color circuit unit, a warm color PWM signal output end of the main processing circuit is connected with a signal input end of the warm color circuit unit, and the signal input end of the cold color circuit unit and the signal input end of the warm color circuit unit form a second input end of the color temperature switching circuit;
and the signal output end of the cold color circuit unit and the signal output end of the warm color circuit unit form the signal output end of the color temperature switching circuit.
Optionally, the cold color circuit unit includes a first switch tube, a third resistor and a fourth resistor;
the first end of the third resistor and the source electrode of the first switching tube are connected with a protective ground in common;
the second end of the third resistor is connected with the first end of the fourth resistor and the grid electrode of the first switching tube, and the second end of the third resistor is a signal input end of the cold color circuit unit;
the second end of the fourth resistor is connected with the signal output end of the switching power supply circuit;
and the drain electrode of the first switching tube is the signal output end of the cold color circuit unit.
Optionally, the warm color circuit unit comprises a second switching tube, a fifth resistor and a sixth resistor;
the first end of the fifth resistor and the source electrode of the second switching tube are both connected with the first end of the third resistor;
a second end of the fifth resistor is connected with a first end of the sixth resistor and a grid electrode of the second switching tube, and the second end of the fifth resistor is a signal input end of the warm color circuit unit;
the second end of the sixth resistor is connected with the signal output end of the switching power supply circuit;
and the drain electrode of the second switching tube is the signal output end of the warm color circuit unit.
Optionally, the first input end of the color temperature switching circuit is used for a positive end of an external light source load, and the signal output end of the cold color circuit unit and the signal output end of the warm color circuit unit are used for a negative end of the external light source load.
The utility model provides a LED lighting drive circuit's beneficial effect lies in:
the embodiment of the utility model provides an in, main processing circuit can receive two toggle switch's gear signal, according to this gear signal output PWM signal to switching power supply circuit and colour temperature switching circuit to realize the regulation of LED illumination product lighting power and colour temperature. That is to say, the embodiment of the utility model provides a drive structure can realize the comprehensive regulation of colour temperature and lighting power.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions 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 it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an LED lighting driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a bridge rectifier circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a signal conversion circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a color temperature switching circuit according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a dual toggle switch circuit according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a main processing circuit according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a first partial structure of a switching power supply circuit according to an embodiment of the present invention;
fig. 8 is a schematic diagram of a second partial structure of a switching power supply circuit according to an embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an LED lighting driving circuit according to an embodiment of the present invention, where the LED lighting driving circuit 10 includes:
the device comprises a main processing circuit 11, a bridge rectifier circuit 12, a switching power supply circuit 13, a color temperature switching circuit 14, a double toggle switch circuit 15 and a signal conversion circuit 16.
The signal input end of the bridge rectifier circuit 12 is used for externally connecting alternating current (i.e. commercial power) and rectifying the received alternating current signal into a direct current signal.
A signal output end of the bridge rectifier circuit 12 is connected to a first input end of the switching power supply circuit 13, and is configured to input a dc signal obtained after rectification to the switching power supply circuit 13.
The signal output end of the switching power supply circuit 13 is connected to the first input end of the color temperature switching circuit 14 and the first input end of the signal conversion circuit 16, and is used for supplying power to the color temperature switching circuit 14 and the signal conversion circuit 16.
The second input end of the signal conversion circuit 16 is used for externally connecting a dimmer, the signal output end of the signal conversion circuit 16 is connected with the first input end of the main processing circuit 11, and is used for converting signals input by the 0-10V dimmer and the switching power supply circuit 13, transmitting the converted signals to the main processing circuit 11, and supplying power to the main processing circuit 11.
The double toggle switch circuit 15 is connected to a second input terminal of the main processing circuit 11, a first output terminal of the main processing circuit 11 is connected to a second input terminal of the switching power supply circuit 13, and a second output terminal of the main processing circuit 11 is connected to a second input terminal of the color temperature switching circuit 14.
The first input end and the signal output end of the color temperature switching circuit 14 are used for externally connecting a light source load.
In this embodiment, the dual toggle switch circuit 15 is used for a user to operate, and in this embodiment, the on signal output by the dual toggle switch circuit 15 is transmitted to the main processing circuit 11, and the main processing circuit 11 generates a PWM control signal to control the switching power supply circuit 11 and the color temperature switching circuit 14, respectively.
In this embodiment, the main processing circuit 11 may generate a PWM control signal according to the received on signal sent by the dual toggle switch circuit, send a first PWM control signal to the switching power supply circuit 13, send a second PWM control signal to the color temperature switching circuit 14, so as to control the lighting color temperature of the light source load through the color temperature switching circuit 14, and control the lighting power of the light source load through the switching power supply circuit 13.
In this embodiment, the first input terminal of the color temperature switching circuit 14 is connected to the positive pole of the light source load, and the signal output terminal of the color temperature switching circuit 14 is connected to the negative pole of the light source load.
From the above description, in the embodiment of the present invention, the main processing circuit can receive the gear signal of the dual toggle switch, and output the PWM signal to the switching power supply circuit and the color temperature switching circuit according to the gear signal, so as to adjust the lighting power and the color temperature of the LED lighting product (i.e. the light source load). That is to say, the embodiment of the utility model provides a drive structure can realize the comprehensive regulation of colour temperature and lighting power.
Optionally, referring to fig. 1 to fig. 2, as a specific implementation manner of the LED lighting driving circuit provided in the embodiment of the present invention, the bridge rectifier circuit 12 includes an ac input unit 121 and a rectifying unit 122.
The signal input end of the ac input unit 121 is used for externally connecting ac power, the signal output end of the ac input unit 121 is connected to the signal input end of the rectifying unit 122, and the signal output end of the rectifying unit 122 is connected to the second input end of the switching power supply circuit.
Optionally, please refer to fig. 1 to fig. 2, as a specific implementation manner of the LED lighting driving circuit provided in the embodiment of the present invention, the ac input unit 121 includes a fuse FR1, a voltage dependent resistor RV1, a first common mode inductor LF1, a first capacitor C1, a first resistor R1, a second resistor R2, and a second common mode inductor LF 2.
A first end (corresponding to the end L in fig. 2) of the fuse FR1 is connected to the live end of the external line, a second end of the fuse FR1 is connected to the first end of the varistor RV1, and a second end (corresponding to the end N in fig. 2) of the varistor RV1 is connected to the neutral end of the external line.
The first end of the first winding of the first common-mode inductor LF1 is connected to the first end of the varistor RV1, and the second end of the first winding of the first common-mode inductor LF2 is connected to the first end of the first capacitor C1. The first end of the second winding of the first common mode inductor LF2 is connected to the second end of the varistor RV1, and the second end of the second winding of the first common mode inductor LF1 is connected to the second end of the first capacitor C1.
The first resistor R1 and the second resistor R2 are connected in series and then connected in parallel with the first capacitor C1.
A first end of the first capacitor C1 is connected to a first end of the first winding of the second common mode inductor LF2, a second end of the first capacitor C1 is connected to a first end of the second winding of the second common mode inductor LF2, and a second end of the first winding of the second common mode inductor LF2 and a second end of the second winding are signal output ends of the ac input unit 121.
The first end of the first winding of the first common-mode inductor LF1 and the first end of the second winding are homonymous ends, and the first end of the first winding of the second common-mode inductor LF2 and the first end of the second winding are homonymous ends.
In this embodiment, the first terminal of the fuse FR1 and the second terminal of the voltage dependent resistor RV1 are signal input terminals of the ac input unit 121.
Alternatively, referring to fig. 1 to fig. 2, as a specific implementation manner of the LED lighting driving circuit provided by the embodiment of the present invention, the rectifying unit 122 is a diode bridge BD1, and the diode bridge BD1 includes a first diode, a second diode, a third diode and a fourth diode.
An anode terminal of the first diode and an anode terminal of the fourth diode are connected (corresponding to pin 4 of diode bridge BD1 in fig. 2), a cathode terminal of the second diode is connected with a cathode terminal of the third diode (corresponding to pin 2 of diode bridge BD1 in fig. 2), and the anode terminal of the first diode and the cathode terminal of the second diode are signal output terminals of the rectifying unit 122.
The second end of the first winding of the second common mode inductor LF1 is connected to the cathode end of the first diode, and the cathode end of the first diode is connected to the anode end of the second diode (corresponding to pin 3 of the diode bridge BD1 in fig. 2). A second end of the second winding of the second common mode inductor LF2 is connected to a cathode terminal of the fourth diode, and the cathode terminal of the fourth diode is connected to an anode terminal of the third diode (corresponding to pin 1 of the diode bridge BD1 in fig. 2).
Optionally, referring to fig. 1 and fig. 3, as a specific implementation manner of the LED lighting driving circuit provided in the embodiment of the present invention, the signal conversion circuit 16 includes a voltage conversion unit 161 and a voltage output unit 162.
Signal input ends (corresponding to 0-10V/DIM (+) end and (DIM-) end in fig. 3) of the voltage conversion unit 161 are used for externally connecting a 0-10V dimmer, a first output end of the voltage conversion unit 161 is connected with a first input end (corresponding to S4+ end in fig. 3) of the voltage output unit 162, and a second output end (corresponding to + AD 0-10Vinput end in fig. 3) of the voltage conversion unit 161 and a signal output end (corresponding to MCU _ VCC end in fig. 3) of the voltage output unit 162 constitute a signal output end of the signal conversion circuit.
A second input terminal of the voltage output unit 162 is connected to the signal output terminal of the switching power supply circuit 13.
In the present embodiment, the voltage conversion unit 161 is configured to perform a voltage conversion process on the input signal of the 0-10V dimmer, and the voltage output unit 162 is configured to generate a corresponding signal according to the input signal after the voltage conversion process and send the signal to the main processing circuit 11 to supply power to the main processing circuit 11.
Alternatively, referring to fig. 1, fig. 4 and fig. 6, as a specific implementation manner of the LED lighting driving circuit provided in the embodiment of the present invention, the second output terminal of the main processing circuit 11 includes a cold color PWM signal output terminal (corresponding to the PWM2 terminal in fig. 6) and a warm color PWM signal output terminal (corresponding to the PWM3 terminal in fig. 6), and the color temperature switching circuit 14 includes a cold color circuit unit 142 and a warm color circuit unit 143 connected in parallel.
A first connection point formed by connecting the cold color circuit unit 142 and the warm color circuit unit 143 in parallel is connected to the protection ground PGND. A second connection point formed by connecting the cold color circuit unit 142 and the warm color circuit unit 143 in parallel is a first input terminal of the color temperature switching circuit 14.
The cold color PWM signal output terminal of the main processing circuit 11 is connected to the signal input terminal (corresponding to the PWM2 terminal in fig. 4) of the cold color circuit unit 142, the warm color PWM signal output terminal of the main processing circuit 11 is connected to the signal input terminal (corresponding to the PWM3 terminal in fig. 4) of the warm color circuit unit, and the signal input terminal of the cold color circuit unit 142 and the signal input terminal of the warm color circuit unit 143 constitute a second input terminal of the color temperature switching circuit 14.
The signal output terminal of the cold color circuit unit 142 and the signal output terminal of the warm color circuit unit 143 constitute a signal output terminal of the color temperature switching circuit 14.
In this embodiment, the color temperature switching circuit 14 may further include a signal output unit 141, and at this time, the signal output terminal of the cold color circuit unit 142 is connected to the first input terminal of the signal output unit 141, the signal output terminal of the warm color circuit unit 143 is connected to the second input terminal of the signal output unit 141, and the first output terminal and the second output terminal of the signal output unit 141 constitute the signal output terminal of the color temperature switching circuit 14.
Optionally, referring to fig. 1, fig. 4, and fig. 6, as a specific implementation of the LED lighting driving circuit provided in the embodiment of the present invention, the cold color circuit unit 142 includes a first switch tube Q4, a third resistor R38, and a fourth resistor R36.
The first end of the third resistor R38 and the source of the first switch Q4 are connected to the protection ground in common.
A second terminal of the third resistor R38 is connected to the first terminal of the fourth resistor R36 and the gate of the first switch Q4, and a second terminal of the third resistor R38 is a signal input terminal of the cold color circuit unit 142.
A second terminal of the fourth resistor R36 is connected to the signal output terminal of the switching power supply circuit 13.
The drain of the first switch Q4 is the signal output terminal of the cold color circuit unit 142.
In this embodiment, in order to protect the first switching tube Q4, the cold color circuit unit 142 may further include a fifth diode TV 2. An anode of the fifth diode TV2 is connected to the source of the first switch Q4, and a cathode of the fifth diode TV2 is connected to the drain of the first switch Q4.
Optionally, referring to fig. 1, fig. 4, and fig. 6, as a specific implementation of the LED lighting driving circuit provided in the embodiment of the present invention, the warm color circuit unit 143 includes a second switch tube Q5, a fifth resistor R37, and a sixth resistor R35.
The first end of the fifth resistor R37 and the source of the second switch Q5 are both connected to the first end of the third resistor R38.
A second terminal of the fifth resistor R37 is connected to the first terminal of the sixth resistor R35 and the gate of the second switch Q5, and a second terminal of the fifth resistor R37 is a signal input terminal of the warm color circuit unit 143.
A second end of the sixth resistor R36 is connected to the signal output terminal of the switching power supply circuit 13.
The drain of the second switching tube Q5 is the signal output terminal of the warm color circuit unit 143.
In this embodiment, in order to protect the second switching tube Q5, the warm color circuit unit 143 may further include a sixth diode TV 1. An anode of the sixth diode TV1 is connected to the source of the second switching tube Q5, and a cathode of the sixth diode TV1 is connected to the drain of the second switching tube Q5.
Alternatively, referring to fig. 1 and fig. 4, as a specific implementation of the LED lighting driving circuit provided in the embodiment of the present invention, on the basis of the foregoing embodiment, the signal output unit 141 may include a third common-mode inductor LF 3.
The first end of the first winding of the third common mode inductor LF3 is connected to the signal output end (corresponding to Cold + end in fig. 4) of the Cold color circuit unit 142, the first end of the second winding of the third common mode inductor LF3 is connected to the signal output end (corresponding to Warm + end in fig. 4) of the Warm color circuit unit 143, the second end of the first winding of the third common mode inductor LF3 is the first output end of the signal output unit, and the second end of the second winding of the third common mode inductor LF3 is the second output end of the signal output unit.
The first end of the first winding of the third common-mode inductor LF3 and the first end of the second winding are homonymous terminals.
Optionally, referring to fig. 1 and fig. 5, as a specific implementation manner of the LED lighting driving circuit provided by the embodiment of the present invention, the dual toggle switch circuit 15 includes a first switch unit 151 and a second switch unit 152, and the signal input terminal of the main processing circuit 11 includes a first input terminal (corresponding to pin 10 of the U3 chip in fig. 6) and a second input terminal (corresponding to pin 12 of the U3 chip in fig. 6).
The first switching unit 151 is connected to a first input terminal of the main processing circuit 11, and the second switching unit 152 is connected to a second input terminal of the main processing circuit 11.
In this embodiment, as can be seen from the circuit shown in fig. 5, the first switch unit 151 and the second switch unit 152 each include a plurality of resistors, so that a user can select to turn on different lines through the dual toggle switch circuit to obtain on signals with different powers, thereby controlling the main processing circuit 11 to output corresponding PWM signals.
Optionally, referring to fig. 4, as a specific implementation manner of the LED lighting driving circuit provided by the embodiment of the present invention, a first input end (corresponding to the LED + end in fig. 4) of the color temperature switching circuit 14 is used for connecting the positive end of the external light source load.
The signal output terminals of the cold color circuit unit 142 and the warm color circuit unit 143 are externally connected to the negative terminal of the light source load, or the first output terminal and the second output terminal of the signal output unit 141 are externally connected to the negative terminal of the light source load (corresponding to the a-terminal and the B-terminal in fig. 4).
In this embodiment, the A-side corresponds to warm tone output and the B-side corresponds to cool tone output.
Optionally, referring to fig. 1 and fig. 6 to fig. 8, as a specific implementation manner of the LED lighting driving circuit provided in the embodiment of the present invention, a first output end (corresponding to the PWM1 end in fig. 6) of the main processing circuit 11 is connected to a second input end (corresponding to the PWM1 end in fig. 8) of the switching power supply circuit 13, and is used for outputting a PWM control signal to the switching power supply circuit 13.
In the present embodiment, fig. 7 and fig. 8 are connected to constitute the switching power supply circuit 13 of the present embodiment, wherein the terminal X1 and the terminal X2 in fig. 7 constitute the first input terminal of the switching power supply circuit 13, and the terminal S4+ in fig. 8 constitutes the signal output terminal of the switching power supply circuit 13.
In the above embodiment, all corresponding port connections in fig. 1 to fig. 8 may constitute an implementation manner of the LED lighting driving circuit provided by the embodiment of the present invention.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or replacements within the technical scope of the present invention, and these modifications or replacements should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. An LED lighting driver circuit, comprising:
the device comprises a main processing circuit, a bridge rectifier circuit, a switching power supply circuit, a color temperature switching circuit, a double toggle switch circuit and a signal conversion circuit;
the signal input end of the bridge rectifier circuit is used for externally connecting alternating current, and the signal output end of the bridge rectifier circuit is connected with the first input end of the switching power supply circuit;
the signal output end of the switching power supply circuit is connected with the first input end of the color temperature switching circuit and the first input end of the signal conversion circuit;
the second input end of the signal conversion circuit is used for being externally connected with a dimmer, and the signal output end of the signal conversion circuit is connected with the first input end of the main processing circuit;
the double toggle switch circuit is connected with the second input end of the main processing circuit, the first output end of the main processing circuit is connected with the second input end of the switch power supply circuit, and the second output end of the main processing circuit is connected with the second input end of the color temperature switching circuit;
and a first input end and a signal output end of the color temperature switching circuit are used for externally connecting a light source load.
2. The LED lighting driving circuit according to claim 1, wherein the bridge rectifier circuit includes an alternating current input unit and a rectifying unit;
the signal input end of the alternating current input unit is used for externally connecting alternating current, the signal output end of the alternating current input unit is connected with the signal input end of the rectifying unit, and the signal output end of the rectifying unit is connected with the second input end of the switching power supply circuit.
3. The LED lighting driving circuit according to claim 1, wherein the signal conversion circuit includes a voltage conversion unit and a voltage output unit;
the signal input end of the voltage conversion unit is used for being externally connected with a 0-10V dimmer, the first output end of the voltage conversion unit is connected with the first input end of the voltage output unit, and the second output end of the voltage conversion unit and the signal output end of the voltage output unit form the signal output end of the signal conversion circuit;
and the second input end of the voltage output unit is connected with the signal output end of the switching power supply circuit.
4. The LED lighting driving circuit according to claim 1, wherein the second output terminal of the main processing circuit includes a cold color PWM signal output terminal and a warm color PWM signal output terminal, and the color temperature switching circuit includes a cold color circuit unit and a warm color circuit unit connected in parallel;
the first connecting point formed by connecting the cold color circuit unit and the warm color circuit unit in parallel is connected with a protective ground; a second connection point formed by connecting the cold color circuit unit and the warm color circuit unit in parallel is a first input end of the color temperature switching circuit;
a cold color PWM signal output end of the main processing circuit is connected with a signal input end of the cold color circuit unit, a warm color PWM signal output end of the main processing circuit is connected with a signal input end of the warm color circuit unit, and the signal input end of the cold color circuit unit and the signal input end of the warm color circuit unit form a second input end of the color temperature switching circuit;
and the signal output end of the cold color circuit unit and the signal output end of the warm color circuit unit form the signal output end of the color temperature switching circuit.
5. The LED lighting driving circuit according to claim 4, wherein the cold color circuit unit includes a first switching tube, a third resistor, and a fourth resistor;
the first end of the third resistor and the source electrode of the first switching tube are connected with a protective ground in common;
the second end of the third resistor is connected with the first end of the fourth resistor and the grid electrode of the first switching tube, and the second end of the third resistor is a signal input end of the cold color circuit unit;
the second end of the fourth resistor is connected with the signal output end of the switching power supply circuit;
and the drain electrode of the first switching tube is the signal output end of the cold color circuit unit.
6. The LED lighting driving circuit according to claim 5, wherein the warm color circuit unit includes a second switching tube, a fifth resistor, and a sixth resistor;
the first end of the fifth resistor and the source electrode of the second switching tube are both connected with the first end of the third resistor;
a second end of the fifth resistor is connected with a first end of the sixth resistor and a grid electrode of the second switching tube, and the second end of the fifth resistor is a signal input end of the warm color circuit unit;
the second end of the sixth resistor is connected with the signal output end of the switching power supply circuit;
and the drain electrode of the second switching tube is the signal output end of the warm color circuit unit.
7. The LED lighting driving circuit according to claim 4, wherein the first input terminal of the color temperature switching circuit is used for a positive terminal of an external light source load, and the signal output terminal of the cold color circuit unit and the signal output terminal of the warm color circuit unit are used for a negative terminal of the external light source load.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022199490.6U CN213662012U (en) | 2020-09-29 | 2020-09-29 | LED lighting driving circuit |
| US17/488,965 US11564298B2 (en) | 2020-09-29 | 2021-09-29 | Lighting apparatus |
| US18/084,910 US11963275B2 (en) | 2020-09-29 | 2022-12-20 | Lighting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022199490.6U CN213662012U (en) | 2020-09-29 | 2020-09-29 | LED lighting driving circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213662012U true CN213662012U (en) | 2021-07-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022199490.6U Active CN213662012U (en) | 2020-09-29 | 2020-09-29 | LED lighting driving circuit |
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| Country | Link |
|---|---|
| CN (1) | CN213662012U (en) |
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2020
- 2020-09-29 CN CN202022199490.6U patent/CN213662012U/en active Active
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