CN216491131U - LED lamp dimming and color mixing control circuit - Google Patents

LED lamp dimming and color mixing control circuit Download PDF

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Publication number
CN216491131U
CN216491131U CN202122675823.2U CN202122675823U CN216491131U CN 216491131 U CN216491131 U CN 216491131U CN 202122675823 U CN202122675823 U CN 202122675823U CN 216491131 U CN216491131 U CN 216491131U
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Prior art keywords
led lamp
resistor
control circuit
circuit
capacitor
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苏福地
涂联楸
黄增光
张文龙
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Xiamen Tenia Lighting & Electrical Co ltd
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Xiamen Tenia Lighting & Electrical Co ltd
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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

Abstract

The utility model discloses a light and color adjusting control circuit of an LED lamp, which is connected between a light adjuster and the LED lamp; the device comprises a rectifier, a DC/DC circuit, a dimmer low-end current maintaining circuit, a dimmer conduction angle detection circuit, an MCU control circuit, a wireless communication module and a drive circuit; the input of the dimmer conduction angle detection circuit and the input of the rectifier are respectively connected to the output of the dimmer; the output of the rectifier is respectively connected to the input of the DC/DC circuit and the input of the driving circuit through the dimmer low-side current maintaining circuit; the output of the driving circuit is connected to the LED lamp; the output of the dimmer conduction angle detection circuit is connected to the MCU control circuit; and the output of the MCU control circuit is respectively connected to the control ends of the driving circuits. The utility model can realize the dimming of the dimmer and the wireless intelligent control of dimming and color mixing, thereby bringing convenience to people and greatly improving the competitiveness of the product.

Description

LED lamp dimming and color mixing control circuit
Technical Field
The utility model relates to the technical field of dimmers, in particular to a dimming and color-mixing control circuit for an LED lamp.
Background
A light Emitting diode (led) is a solid semiconductor device capable of converting electrical energy into visible light, and can directly convert electricity into light. The LED has the advantages of small volume, low power consumption, long service life, high brightness, low heat, environmental protection and the like, and is widely applied to the field of illumination. A dimmer is an electrical device that varies the luminous flux of a light source in a lighting device, adjusting the level of illumination. The prior art LED lamp is usually configured with a dimming device to realize dimming of the LED lamp, and the dimming mode of the prior art LED lamp is generally classified as dimming through a common dimmer or dimming and color mixing through wireless intelligent control, and there is no dimming and color mixing control circuit capable of realizing dimming of a dimmer and dimming and color mixing through wireless intelligent control, so that inconvenience is brought to people.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of the prior art and provides the LED lamp dimming and color mixing control circuit, through the improvement of the circuit structure, the dimming of a dimmer can be realized, and the dimming and color mixing can be realized through wireless intelligent control, so that the use of people is facilitated, and the competitiveness of the product is greatly improved.
The technical scheme adopted by the utility model for solving the technical problems is as follows: a light and color adjusting control circuit of an LED lamp is connected between a light adjuster and the LED lamp; the control circuit comprises a rectifier, a DC/DC circuit, a dimmer low-end current maintaining circuit, a dimmer conduction angle detection circuit, an MCU control circuit, a wireless communication module and a drive circuit; the input of the dimmer conduction angle detection circuit and the input of the rectifier are respectively connected to the output of the dimmer; the output of the rectifier is respectively connected to the input of the DC/DC circuit and the input of the driving circuit through the dimmer low-side current maintaining circuit; the output of the driving circuit is connected to the LED lamp; the output of the DC/DC circuit is respectively connected to the MCU control circuit and the power supply end of the wireless communication module; the output of the dimmer conduction angle detection circuit is connected to the MCU control circuit; the output of the MCU control circuit is respectively connected to the control ends of the driving circuits; the MCU control circuit is connected with the wireless communication module.
The LED lamps comprise cold light LED lamp strings, warm light LED lamp strings, red light LED lamp strings, green light LED lamp strings and blue light LED lamp strings; the driving circuit is a three-way PWM dimming constant current control circuit, and the outputs of two ways of the three-way PWM dimming constant current control circuit are respectively connected to the cold light LED lamp string and the warm light LED lamp string; and the output of the other path of the three paths of PWM dimming constant-current control circuits is respectively connected to the red LED lamp strings, the green LED lamp strings and the blue LED lamp strings.
The LED lamps comprise cold light LED lamp strings, warm light LED lamp strings, red light LED lamp strings, green light LED lamp strings and blue light LED lamp strings; the driving circuit comprises two paths of PWM dimming constant-current control circuits and one path of PWM color temperature control circuit, and the output of one path of the two paths of PWM dimming constant-current control circuits is respectively connected to the cold light LED lamp string and the warm light LED lamp string; the output of the other of the two PWM dimming constant-current control circuits is respectively connected to the red LED lamp string, the green LED lamp string and the blue LED lamp string; and the output of the PWM color temperature control circuit is respectively connected to the cold light LED lamp string and the warm light LED lamp string.
And the output of the MCU control circuit is also respectively connected to the control ends of the red LED lamp string, the green LED lamp string and the blue LED lamp string.
The MCU control circuit and the wireless communication module are two independent chips or one chip integrated together; when the MCU control circuit and the wireless communication module are one chip, the MCU control circuit is integrated in the wireless communication module.
The dimmer low-side current maintaining circuit comprises a resistor R22, a resistor R24, a resistor R26, a resistor R27, a capacitor C27, a capacitor C22, a zener diode ZD20 and a MOS tube Q10; one end of the resistor R22 is connected with one end of the zener diode ZD20, the other end of the resistor R22 is connected to one output end of the rectifier, and the other end of the zener diode ZD20 is connected to the other output end of the rectifier and is grounded; one end of the resistor R24 and the capacitor C22 which are connected in series is connected with one end of the resistor R26, the other end of the resistor R24 and the capacitor C22 which are connected in series is connected to one output end of the rectifier, and the other end of the resistor R26 is connected to the other output end of the rectifier; the source and the drain of the MOS transistor Q10 are respectively connected to two ends of the resistor R26; one end of the resistor R27 and the capacitor C27 which are connected in parallel is connected to the gate of the MOS transistor Q10, and the other end of the resistor R27 and the capacitor C27 which are connected in parallel is grounded; and two ends of the resistor R27 and the capacitor C27 which are connected in parallel are respectively connected with two ends of the zener diode ZD 20.
The dimmer low-side current maintenance circuit further comprises a resistor R23; the resistor R23 is connected in series between the resistor R22 and one end of the zener diode ZD 20.
The dimmer conduction angle detection circuit comprises a diode D50, a diode D51, a zener diode ZD31, a resistor R53, a resistor R56, a resistor R57, a capacitor C51 and a triode Q50; one end of each of the diode D50 and the diode D51 is connected to the dimmer, the other end of each of the diode D50 and the diode D51 is connected to one end of the resistor R53, the other end of the resistor R53 is connected to one end of the zener diode ZD31 and the base of the triode Q50, and the other end of the zener diode ZD31 is grounded; one end of the resistor R56 is connected with a power supply end, the other end of the resistor R56 is respectively connected to one end of the resistor R57 and the collector of the triode Q50, and the other end of the resistor R57 is grounded through a capacitor C51; the emitter of the transistor Q50 is grounded.
The dimmer conduction angle detection circuit further comprises a resistor R54, a resistor R55 and a capacitor C50; the resistor R54 is connected in series between the resistor R53 and one end of the zener diode ZD 31; the resistor R55 and the capacitor C50 are respectively connected in parallel with the zener diode ZD 31.
The DC/DC circuit comprises a diode D22, a diode D23, a resistor R21, a capacitor C23, a capacitor C25, a capacitor C24, a capacitor C26, an integrated circuit chip U21 and an inductor L21; one end of the diode D22 is connected to the second pin of the integrated circuit chip U21, one end of the diode D22 is connected to the first pin of the integrated circuit chip U21 through the capacitor C23, and the third pin and the fourth pin of the integrated circuit chip U21 are respectively connected with two ends of the capacitor C25; one end of the inductor L21 is connected to the third pin of the integrated circuit chip U21, and the other end of the inductor L21 is connected to the fourth pin of the integrated circuit chip U21 through the diode D23; two ends of the capacitor C24, the resistor R21 and the capacitor C26 are respectively connected with the other end of the inductor L21 and the first pin of the integrated circuit chip U21.
Compared with the prior art, the utility model has the beneficial effects that:
the LED lamp dimming and color-mixing control circuit connected between the dimmer and the LED lamp is formed by adopting the rectifier, the DC/DC circuit, the dimmer low-end current maintaining circuit, the dimmer conduction angle detection circuit, the MCU control circuit, the wireless communication module and the driving circuit; and the input of the dimmer conduction angle detection circuit and the input of the rectifier are respectively connected to the output of the dimmer; the output of the rectifier is respectively connected to the input of the DC/DC circuit and the input of the driving circuit through the dimmer low-side current maintaining circuit; the output of the driving circuit is connected to the LED lamp; the output of the DC/DC circuit is respectively connected to the MCU control circuit and the power supply end of the wireless communication module; the output of the dimmer conduction angle detection circuit is connected to the MCU control circuit; the output of the MCU control circuit is respectively connected to the control ends of the driving circuits; the MCU control circuit is connected with the wireless communication module. According to the structure, the dimmer low-end current maintaining circuit and the dimmer conduction angle detection circuit are adopted, so that dimming of the dimmer can be realized, wireless intelligent control for dimming and color mixing can be realized, convenience is brought to use of people, and meanwhile, the competitiveness of products is greatly improved.
The utility model is further explained in detail with the accompanying drawings and the embodiments; however, the dimming and color-adjusting control circuit of the LED lamp of the present invention is not limited to the embodiment.
Drawings
FIG. 1 is a block circuit diagram of a first embodiment of the present invention;
fig. 2 is a circuit schematic of a rectifier and dimmer low-side current maintenance circuit according to a first embodiment of the present invention;
fig. 3 is a circuit schematic of a DC/DC circuit and a dimmer conduction angle detection circuit according to a first embodiment of the present invention;
fig. 4 is a schematic circuit diagram of a three-way PWM dimming constant current control circuit according to a first embodiment of the present invention;
fig. 5 is a schematic circuit diagram of an MCU control circuit and a wireless communication module according to a first embodiment of the present invention;
FIG. 6 is a circuit block diagram of a second embodiment of the utility model;
fig. 7 is a circuit block diagram of a third embodiment of the present invention.
Detailed Description
Example one
Referring to fig. 1 to 5, the LED lamp dimming and color-adjusting control circuit of the present invention is connected between a dimmer 10 and an LED lamp; the control circuit comprises a rectifier 11, a DC/DC circuit 12, a dimmer low-end current maintaining circuit 13, a dimmer conduction angle detection circuit 14, an MCU control circuit 15, a wireless communication module 16 and a drive circuit; an input of the dimmer conduction angle detection circuit 14 and an input of the rectifier 11 are respectively connected to an output of the dimmer 10; the output of the rectifier 11 is connected to the input of the DC/DC circuit 12 and the input of the driving circuit through the dimmer low-side current maintaining circuit 13; the output of the driving circuit is connected to the LED lamp; the output of the DC/DC circuit 12 is respectively connected to the MCU control circuit 15 and the power supply end of the wireless communication module 16; the output of the dimmer conduction angle detection circuit 14 is connected to the MCU control circuit 15; the output of the MCU control circuit 15 is respectively connected to the control ends of the driving circuits; the MCU control circuit 15 is connected to the wireless communication module 16.
In this embodiment, the LED lamps include a cold light LED lamp string 21, a warm light LED lamp string 22, a red light LED lamp string 23, a green light LED lamp string 24, and a blue light LED lamp string 25; the driving circuit is a three-way PWM dimming constant current control circuit, and the outputs of two PWM dimming constant current control circuits 31 and 32 in the three-way PWM dimming constant current control circuit are respectively connected to the cold light LED lamp string 21 and the warm light LED lamp string 22; and the output of the other dimming constant-current control circuit 33 in the three PWM dimming constant-current control circuits is respectively connected to the red LED lamp string 23, the green LED lamp string 24 and the blue LED lamp string 25.
In this embodiment, the output of the MCU control circuit 15 is further connected to the control ends of the red LED lamp string 23, the green LED lamp string 24, and the blue LED lamp string 25, respectively.
In this embodiment, the dimmer low-side current maintaining circuit 13 includes a resistor R22, a resistor R24, a resistor R26, a resistor R27, a capacitor C27, a capacitor C22, a zener diode ZD20, and a MOS transistor Q10; one end of the resistor R22 is connected to one end of the zener diode ZD20, the other end of the resistor R22 is connected to one output end of the rectifier, i.e., the third pin of the bridge rectifier BD20, and the other end of the zener diode ZD20 is connected to the other output end of the rectifier, i.e., the first pin of the bridge rectifier BD20 and ground; one end of the resistor R24 and the capacitor C22 which are connected in series is connected with one end of the resistor R26, the other end of the resistor R24 and the capacitor C22 which are connected in series is connected to a third pin of an output end of the rectifier, namely a bridge rectifier BD20, and the other end of the resistor R26 is connected to a first pin of the other output end of the rectifier, namely a bridge rectifier BD 20; the source and the drain of the MOS transistor Q10 are respectively connected to two ends of the resistor R26; one end of the resistor R27 and the capacitor C27 which are connected in parallel is connected to the gate of the MOS transistor Q10, and the other end of the resistor R27 and the capacitor C27 which are connected in parallel is grounded; and two ends of the resistor R27 and the capacitor C27 which are connected in parallel are respectively connected with two ends of the zener diode ZD 20.
In this embodiment, the dimmer low-side current maintaining circuit 13 further includes a resistor R23; the resistor R23 is connected in series between the resistor R22 and one end of the zener diode ZD 20.
When the on-current ratio of the dimmer is low, the resistor R26 is connected into the circuit, the MOS tube Q10 is switched off, the current conducting current is increased to maintain the normal work of the controllable silicon, when the on-current ratio of the dimmer is high, the MOS tube Q10 is switched on, the resistor R26 is short-circuited, and the loss can be reduced.
In this embodiment, the dimmer conduction angle detection circuit 14 includes a diode D50, a diode D51, a zener diode ZD31, a resistor R53, a resistor R56, a resistor R57, a capacitor C51, and a transistor Q50; one ends of the diode D50 and the diode D51 are respectively connected to the dimmer, specifically to Lin and Nin; the other ends of the diode D50 and the diode D51 are respectively connected to one end of a resistor R53, the other end of the resistor R53 is respectively connected to one end of a zener diode ZD31 and the base of a triode Q50, and the other end of the zener diode ZD31 is grounded; one end of the resistor R56 is connected with a power supply end, the other end of the resistor R56 is respectively connected to one end of the resistor R57 and the collector of the triode Q50, and the other end of the resistor R57 is grounded through a capacitor C51; the emitter of the transistor Q50 is grounded.
In this embodiment, the dimmer conduction angle detection circuit 14 further includes a resistor R54, a resistor R55, and a capacitor C50; the resistor R54 is connected in series between the resistor R53 and one end of the zener diode ZD 31; the resistor R55 and the capacitor C50 are respectively connected in parallel with the zener diode ZD 31.
Alternating current passes through a rectifier diode D50 and a diode D51, then is subjected to voltage division through a resistor R53, a resistor R54 and a resistor R55 and then is input into a triode Q50, square wave signals are output through the resistor R56 and the resistor R57 and then are input into the MCU control circuit 15 and the wireless communication module 16, when the dimmer conducts the light, the conduction angle changes, and the PWM value output by the IC correspondingly changes.
In this embodiment, the DC/DC circuit includes a diode D22, a diode D23, a resistor R21, a capacitor C23, a capacitor C25, a capacitor C24, a capacitor C26, an integrated circuit chip U21, and an inductor L21, where the model of the integrated circuit chip U21 is KP 15026; one end of the diode D22 is connected to the second pin Drain of the integrated circuit chip U21, one end of the diode D22 is connected to the first pin GND of the integrated circuit chip U21 through the capacitor C23, and the third pin ICG and the fourth pin VDD of the integrated circuit chip U21 are respectively connected to two ends of the capacitor C25; one end of the inductor L21 is connected to the third pin of the integrated circuit chip U21, and the other end of the inductor L21 is connected to the fourth pin of the integrated circuit chip U21 through the diode D23; two ends of the capacitor C24, the resistor R21 and the capacitor C26 are respectively connected with the other end of the inductor L21 and the first pin of the integrated circuit chip U21.
In this embodiment, the three-way PWM dimming constant current control circuit includes a chip U10, a chip U11, a chip U12, a resistor R12, a resistor R13, a resistor R16, a resistor R17, a resistor R1, a resistor R2, a resistor RS1, a resistor RS2, a resistor RS3, a resistor RS4, a resistor RS5, a resistor RS6, a diode D1, a diode D2, a diode D10, a diode D11, a diode D15, a diode D16, an inductor L11, an inductor L12, an inductor L13, a capacitor C11, a capacitor C16, a capacitor C1, a MOS Q11, a MOS Q12, and a MOS Q13, and the MCU control circuit 15 outputs a PWM signal and then adjusts current through a PWM pin of the IC, the chip U10, the chip U11, and the chip U12, thereby achieving dimming. The models of the chip U10, the chip U11 and the chip U12 are BP2306 HK.
In this embodiment, the MCU control circuit 15 is composed of a chip U60 and peripheral circuit elements, and the model of the chip U60 is ASM31X 003.
In this embodiment, the wireless communication module 16 is composed of a chip B70 and peripheral circuit elements, and the model of the chip B70 is E2S or CBU or BT 7L.
The LED lamp dimming and color mixing control circuit adopts a rectifier 11, a DC/DC circuit 12, a dimmer low-end current maintaining circuit 13, a dimmer conduction angle detection circuit 14, an MCU control circuit 15, a wireless communication module 16 and a drive circuit to form the LED lamp dimming and color mixing control circuit connected between a dimmer and an LED lamp; and the input of the dimmer conduction angle detection circuit and the input of the rectifier are respectively connected to the output of the dimmer; the output of the rectifier is respectively connected to the input of the DC/DC circuit and the input of the driving circuit through the dimmer low-side current maintaining circuit; the output of the driving circuit is connected to the LED lamp; the output of the DC/DC circuit is respectively connected to the MCU control circuit and the power supply end of the wireless communication module; the output of the dimmer conduction angle detection circuit is connected to the MCU control circuit; the output of the MCU control circuit is respectively connected to the control ends of the driving circuits; the MCU control circuit is connected with the wireless communication module. According to the structure, the dimmer low-end current maintaining circuit and the dimmer conduction angle detection circuit are adopted, so that dimming of the dimmer can be realized, wireless intelligent control for dimming and color mixing can be realized, convenience is brought to use of people, and meanwhile, the competitiveness of products is greatly improved.
Example two
Referring to fig. 6, the difference between the dimming and color-adjusting control circuit for an LED lamp of the present invention and the first embodiment is that the MCU control circuit and the wireless communication module are integrated into a chip; the MCU control circuit is integrated in the wireless communication module 16, and the wireless communication module 16 realizes the function of the MCU control circuit.
EXAMPLE III
Referring to fig. 7, the dimming and color-adjusting control circuit for an LED lamp according to the present invention is different from the first embodiment in that the driving circuit includes two PWM dimming constant current control circuits 41 and 42 and one PWM color temperature control circuit 43, and an output of one PWM dimming constant current control circuit 41 of the two PWM dimming constant current control circuits is respectively connected to the cold light LED lamp string 21 and the warm light LED lamp string 22; the output of the other PWM dimming constant current control circuit 42 in the two PWM dimming constant current control circuits is respectively connected to the red LED lamp string 23, the green LED lamp string 24 and the blue LED lamp string 25; the output of the PWM color temperature control circuit 43 is connected to the cold light LED string 21 and the warm light LED string 22 respectively.
The foregoing is considered as illustrative of the preferred embodiments of the utility model and is not to be construed as limiting the utility model in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make many possible variations and modifications to the disclosed embodiments, or equivalent modifications, without departing from the scope of the disclosed embodiments. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims (10)

1. The utility model provides a LED lamp mixing of colors control circuit that adjusts luminance which characterized in that: is connected between the dimmer and the LED lamp; the control circuit comprises a rectifier, a DC/DC circuit, a dimmer low-end current maintaining circuit, a dimmer conduction angle detection circuit, an MCU control circuit, a wireless communication module and a drive circuit; the input of the dimmer conduction angle detection circuit and the input of the rectifier are respectively connected to the output of the dimmer; the output of the rectifier is respectively connected to the input of the DC/DC circuit and the input of the driving circuit through the dimmer low-side current maintaining circuit; the output of the driving circuit is connected to the LED lamp; the output of the DC/DC circuit is respectively connected to the MCU control circuit and the power supply end of the wireless communication module; the output of the dimmer conduction angle detection circuit is connected to the MCU control circuit; the output of the MCU control circuit is respectively connected to the control ends of the driving circuits; the MCU control circuit is connected with the wireless communication module.
2. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the LED lamps comprise cold light LED lamp strings, warm light LED lamp strings, red light LED lamp strings, green light LED lamp strings and blue light LED lamp strings; the driving circuit is a three-way PWM dimming constant current control circuit, and the outputs of two ways of the three-way PWM dimming constant current control circuit are respectively connected to the cold light LED lamp string and the warm light LED lamp string; and the output of the other path of the three paths of PWM dimming constant-current control circuits is respectively connected to the red LED lamp strings, the green LED lamp strings and the blue LED lamp strings.
3. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the LED lamps comprise cold light LED lamp strings, warm light LED lamp strings, red light LED lamp strings, green light LED lamp strings and blue light LED lamp strings; the driving circuit comprises two paths of PWM dimming constant-current control circuits and one path of PWM color temperature control circuit, and the output of one path of the two paths of PWM dimming constant-current control circuits is respectively connected to the cold light LED lamp string and the warm light LED lamp string; the output of the other of the two PWM dimming constant-current control circuits is respectively connected to the red LED lamp string, the green LED lamp string and the blue LED lamp string; and the output of the PWM color temperature control circuit is respectively connected to the cold light LED lamp string and the warm light LED lamp string.
4. The LED lamp dimming and color-adjusting control circuit according to claim 2 or 3, characterized in that: and the output of the MCU control circuit is also respectively connected to the control ends of the red LED lamp string, the green LED lamp string and the blue LED lamp string.
5. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the MCU control circuit and the wireless communication module are two independent chips or one chip integrated together; when the MCU control circuit and the wireless communication module are one chip, the MCU control circuit is integrated in the wireless communication module.
6. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the dimmer low-side current maintaining circuit comprises a resistor R22, a resistor R24, a resistor R26, a resistor R27, a capacitor C27, a capacitor C22, a zener diode ZD20 and a MOS tube Q10; one end of the resistor R22 is connected with one end of the zener diode ZD20, the other end of the resistor R22 is connected to one output end of the rectifier, and the other end of the zener diode ZD20 is connected to the other output end of the rectifier and is grounded; one end of the resistor R24 and the capacitor C22 which are connected in series is connected with one end of the resistor R26, the other end of the resistor R24 and the capacitor C22 which are connected in series is connected to one output end of the rectifier, and the other end of the resistor R26 is connected to the other output end of the rectifier; the source and the drain of the MOS transistor Q10 are respectively connected to two ends of the resistor R26; one end of the resistor R27 and the capacitor C27 which are connected in parallel is connected to the gate of the MOS transistor Q10, and the other end of the resistor R27 and the capacitor C27 which are connected in parallel is grounded; and two ends of the resistor R27 and the capacitor C27 which are connected in parallel are respectively connected with two ends of the zener diode ZD 20.
7. The LED lamp dimming and color-adjusting control circuit according to claim 6, wherein: the dimmer low-side current maintenance circuit further comprises a resistor R23; the resistor R23 is connected in series between the resistor R22 and one end of the zener diode ZD 20.
8. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the dimmer conduction angle detection circuit comprises a diode D50, a diode D51, a zener diode ZD31, a resistor R53, a resistor R56, a resistor R57, a capacitor C51 and a triode Q50; one end of each of the diode D50 and the diode D51 is connected to the dimmer, the other end of each of the diode D50 and the diode D51 is connected to one end of the resistor R53, the other end of the resistor R53 is connected to one end of the zener diode ZD31 and the base of the triode Q50, and the other end of the zener diode ZD31 is grounded; one end of the resistor R56 is connected with a power supply end, the other end of the resistor R56 is respectively connected to one end of the resistor R57 and the collector of the triode Q50, and the other end of the resistor R57 is grounded through a capacitor C51; the emitter of the transistor Q50 is grounded.
9. The LED lamp dimming and color-adjusting control circuit according to claim 8, wherein: the dimmer conduction angle detection circuit further comprises a resistor R54, a resistor R55 and a capacitor C50; the resistor R54 is connected in series between the resistor R53 and one end of the zener diode ZD 31; the resistor R55 and the capacitor C50 are respectively connected in parallel with the zener diode ZD 31.
10. The LED lamp dimming and color-adjusting control circuit according to claim 1, wherein: the DC/DC circuit comprises a diode D22, a diode D23, a resistor R21, a capacitor C23, a capacitor C25, a capacitor C24, a capacitor C26, an integrated circuit chip U21 and an inductor L21; one end of the diode D22 is connected to the second pin of the integrated circuit chip U21, one end of the diode D22 is connected to the first pin of the integrated circuit chip U21 through the capacitor C23, and the third pin and the fourth pin of the integrated circuit chip U21 are respectively connected with two ends of the capacitor C25; one end of the inductor L21 is connected to the third pin of the integrated circuit chip U21, and the other end of the inductor L21 is connected to the fourth pin of the integrated circuit chip U21 through the diode D23; two ends of the capacitor C24, the resistor R21 and the capacitor C26 are respectively connected with the other end of the inductor L21 and the first pin of the integrated circuit chip U21.
CN202122675823.2U 2021-11-03 2021-11-03 LED lamp dimming and color mixing control circuit Active CN216491131U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122675823.2U CN216491131U (en) 2021-11-03 2021-11-03 LED lamp dimming and color mixing control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122675823.2U CN216491131U (en) 2021-11-03 2021-11-03 LED lamp dimming and color mixing control circuit

Publications (1)

Publication Number Publication Date
CN216491131U true CN216491131U (en) 2022-05-10

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