CN215222534U - Dimming drive circuit, dimming drive device and lamp - Google Patents

Dimming drive circuit, dimming drive device and lamp Download PDF

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Publication number
CN215222534U
CN215222534U CN202120447191.1U CN202120447191U CN215222534U CN 215222534 U CN215222534 U CN 215222534U CN 202120447191 U CN202120447191 U CN 202120447191U CN 215222534 U CN215222534 U CN 215222534U
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China
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light source
module
constant voltage
circuit
control module
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CN202120447191.1U
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Inventor
林起锵
叶和木
刘宗源
李炎坤
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Leedarson Lighting Co Ltd
Zhangzhou Lidaxin Optoelectronic Technology Co ltd
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Leedarson Lighting Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

The application provides a dimming driving circuit, a dimming driving device and a lamp, wherein alternating current is accessed through a rectifying module and is converted into direct current, a constant voltage control module converts the direct current into a constant voltage driving signal through a switching power supply and sends the constant voltage driving signal to a light source component, and samples the voltage of the light source component to obtain a voltage feedback signal so as to adjust the constant voltage driving signal, a linear dimming driving module controls the output current of each path of light emitting unit in the light source component according to a pulse width modulation signal output by a main control module so as to adjust the brightness and the color temperature of the light source component, wherein the front-stage circuit adopts a constant voltage circuit, the rear-stage circuit adopts a low-voltage difference linear scheme, simultaneously collects the voltage signal of the light source component to control the output voltage of the front stage, controls the input and output voltage difference of the linear driving to be minimum, and reduces the driving loss, finally, the efficiency of the whole dimming driving circuit is improved.

Description

Dimming drive circuit, dimming drive device and lamp
Technical Field
The application belongs to the technical field of lamps and lanterns, especially relates to a drive circuit, drive arrangement and lamps and lanterns adjust luminance of adjusting luminance.
Background
The LED lamp has the advantages of small volume, high efficiency and large current, and is widely applied to occasions such as illumination, backlight and the like. In a lighting system, how to dim various light sources is a very challenging task. The dimming technology can enable a user to adjust the brightness of the light source according to actual needs, and the dimming technology can be used for dimming the brightness of the light source in an application scene without strong light, so that the consumption of electric energy is reduced, and energy is saved.
At present, the market has more and more demands on intelligent lighting, and the requirement on high efficiency and high luminous efficiency is improved year by year, but the current dimming driving scheme has lower efficiency and cannot meet the high luminous efficiency requirement.
SUMMERY OF THE UTILITY MODEL
An object of the embodiment of the application is to provide a dimming driving circuit, a dimming driving device and a lamp, and aims to provide a dimming driving scheme with high efficiency and high luminous efficiency.
In order to achieve the above object, an embodiment of the present application provides a dimming driving circuit, connected to a light source assembly, the dimming driving circuit including:
the rectifier module is used for accessing alternating current and converting the alternating current into direct current;
the constant voltage control module is connected with the rectification module and used for converting the direct current into a constant voltage driving signal through a switching power supply and sending the constant voltage driving signal to the light source assembly, and sampling the voltage of the light source assembly to obtain a voltage feedback signal so as to adjust the constant voltage driving signal;
the main control module is used for outputting pulse width modulation signals;
and the linear dimming driving module is connected with the main control module and the light source assembly and used for receiving the pulse width modulation signals and controlling the output current of each path of light-emitting unit in the light source assembly according to the pulse width modulation signals so as to adjust the brightness and the color temperature of the light source assembly.
In one embodiment, the dimming driving circuit further includes:
and the filtering module is respectively connected with the rectifying module and the constant voltage control module and is used for filtering the direct current output by the rectifying module and outputting the direct current voltage after filtering to the constant voltage control module.
In one embodiment, the dimming driving circuit further includes:
and the overcurrent protection module is connected with the rectification module and used for carrying out overcurrent protection on the alternating current.
In one embodiment, the dimming driving circuit further includes:
and the load voltage feedback module is respectively connected with the constant voltage control module and the light source assembly and used for sampling the working voltage of the light source assembly and generating the voltage feedback signal.
In one embodiment, the linear dimming driving module is further connected to the constant voltage control module, and configured to send the voltage feedback signal to the constant voltage control module according to the pulse width modulation signal.
In one embodiment, the dimming driving circuit further includes:
and the power supply module is respectively connected with the rectifying module and the main control module and used for receiving the direct current and converting the voltage of the direct current so as to supply power to the main control module.
In one embodiment, the constant voltage control module is a Boost circuit, a Buck circuit, a flyback circuit, a Buck-Boost circuit, an LLC circuit, an LCC circuit, or a forward circuit.
The embodiment of the application also provides a dimming driving device, which comprises the dimming driving circuit.
An embodiment of the present application further provides a lamp, including: a light source assembly; and the dimming driving circuit is connected with the light source component.
In one embodiment, the light source assembly includes a plurality of light emitting units, and color temperatures of the plurality of light emitting units are different from each other.
The application provides a lamps and lanterns's beneficial effect lies in: compared with the prior art, the dimming driving circuit in the application comprises a rectifying module, a constant voltage control module, a main control module and a linear dimming driving module, wherein alternating current is accessed through the rectifying module and is converted into direct current, the constant voltage control module converts the direct current into a constant voltage driving signal through a switching power supply and sends the constant voltage driving signal to a light source assembly, and samples the voltage of the light source assembly to obtain a voltage feedback signal so as to adjust the constant voltage driving signal, the linear dimming driving module controls the output current of each path of light emitting unit in the light source assembly according to a pulse width modulation signal output by the main control module so as to adjust the brightness and color temperature of the light source assembly, wherein the front-stage circuit adopts a constant voltage circuit, the rear-stage circuit adopts a low-voltage-difference linear scheme, and simultaneously acquires a voltage signal of the light source assembly to control the output voltage of the front stage, and controls the input-output voltage difference of linear driving to be minimum, and the driving loss is reduced, and the efficiency of the whole dimming driving circuit is finally improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in 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 application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a circuit structure diagram of a dimming driving circuit according to an embodiment of the present application;
fig. 2 is a circuit structure diagram of another dimming driving circuit according to an embodiment of the present application;
fig. 3 is a circuit structure diagram of another dimming driving circuit according to an embodiment of the present application;
fig. 4 is a circuit structure diagram of another dimming driving circuit provided in the embodiment of the present application;
fig. 5 is a circuit structure diagram of another dimming driving circuit according to an embodiment of the present application;
fig. 6 is a circuit structure diagram of another dimming driving circuit according to an embodiment of the present application;
fig. 7 is a schematic circuit structure diagram of a power supply module according to an embodiment of the present application.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In order to achieve the above object, the present embodiment provides a dimming driving circuit, and as shown in fig. 1, the dimming driving circuit in the present embodiment is connected to a light source assembly 30, and includes a rectifying module 10, a constant voltage control module 20, a main control module 50, and a linear dimming driving module 40, where the rectifying module 10 is configured to access an alternating current and convert the alternating current into a direct current; the constant voltage control module 20 is connected to the rectifier module 10, and is configured to convert the direct current into a constant voltage driving signal through a switching power supply and send the constant voltage driving signal to the light source assembly 30, and sample the voltage of the light source assembly 30 to obtain a voltage feedback signal, and adjust the constant voltage driving signal, the main control module 50 is configured to output a pulse width modulation signal, the linear dimming driving module 40 is connected to the main control module 50 and the light source assembly 30, and is configured to receive the pulse width modulation signal, and control the output current of each path of light emitting unit in the light source assembly 30 according to the pulse width modulation signal, and adjust the brightness and color temperature of the light source assembly 30.
In the embodiment, ac power is input through the rectifier module 10 and converted into dc power, the constant voltage control module 20 converts the dc power into a constant voltage driving signal through the switching power supply and sends the constant voltage driving signal to the light source assembly 30, and samples the voltage of the light source assembly 30 to obtain a voltage feedback signal, to adjust the constant voltage driving signal, the linear dimming driving module 40 controls the output current of each light emitting unit in the light source assembly 30 according to the pulse width modulation signal outputted from the main control module 50 to adjust the brightness and color temperature of the light source assembly 30, wherein, preceding stage circuit adopts constant voltage circuit, and the linear scheme of low dropout is adopted to the following stage circuit, and the voltage signal who gathers light source subassembly 30 simultaneously controls the output voltage of preceding stage, controls linear drive's input/output voltage difference at minimum, reduces the drive loss, finally improves whole drive circuit's of adjusting luminance efficiency.
In one embodiment, referring to fig. 2, the dimming driving circuit further includes a filtering module 60, and the filtering module 60 is respectively connected to the rectifying module 10 and the constant voltage control module, and is configured to filter the dc power output by the rectifying module 10 and output the filtered dc power to the constant voltage control module.
In the present embodiment, the filtering module 60 is disposed behind the rectifying module 10 and is configured to filter the direct current output by the rectifying module 10 to eliminate noise such as a peak in the direct current.
In one embodiment, referring to fig. 3, the dimming driving circuit further includes an overcurrent protection module 70, and the overcurrent protection module 70 is connected to the rectifier module 10 for performing overcurrent protection on the ac power.
In this embodiment, the overcurrent protection module 70 is disposed between the input end of the rectifier module 10 and the live wire, and is used for performing overcurrent detection on the ac power to prevent the rear-stage circuit from being damaged due to overcurrent of the ac power.
In one embodiment, referring to fig. 4, the dimming driving circuit further includes a load voltage feedback module 80, and the load voltage feedback module 80 is respectively connected to the constant voltage control module 20 and the light source assembly 30, and is configured to sample the operating voltage of the light source assembly 30 and generate a voltage feedback signal.
In this embodiment, two ends of the load voltage feedback module 80 are connected in parallel with the light source assembly 30 for detecting the voltage across the light source assembly 30 and generating a voltage feedback signal to the constant voltage control module 20.
In one embodiment, the linear dimming driving module 40 is further connected to the constant voltage control module 20 for sending a voltage feedback signal to the constant voltage control module 20 according to the pulse width modulation signal.
In the present embodiment, the linear dimming driving module 40 is connected to the constant voltage control module 20 for sending a voltage feedback signal to the constant voltage control module 20, and at this time, the constant voltage control module 20 samples the voltage directly from the linear dimming driving module 40.
In one embodiment, referring to fig. 5, the dimming driving circuit further includes a power supply module 90, and the power supply module 90 is respectively connected to the rectifying module 10 and the main control module 50, and is configured to receive the direct current and perform voltage conversion on the direct current to supply power to the main control module 50.
In one embodiment, the constant voltage control module 20 is a Boost circuit, a Buck circuit, a flyback circuit, a Buck-Boost circuit, an LLC circuit, an LCC circuit, or a forward circuit.
In this embodiment, the constant voltage control module 20 converts the rectified voltage into a constant output voltage through the switching power supply and provides the constant output voltage to the subsequent linear circuit, and the constant voltage control module 20 may be a Boost, Buck, flyback, Buck-Boost, LLC, LCC, or forward circuit.
In one embodiment, the main control module 50 may be an RF module for forwarding the pwm signal to the linear dimming driving module 40.
In one embodiment, the linear dimming driving module 40 may receive multiple pulse width modulation signals, and the duty ratios of the multiple pulse width modulation signals may be different, so as to adjust the operating currents of multiple light emitting units in the light source assembly 30, thereby achieving the purpose of dimming and color-adjusting the light source assembly 30.
In one embodiment, referring to fig. 6, the rectifier module 10 includes a rectifier bridge BD, a first input end of the rectifier bridge BD is connected to the live line L through the overcurrent protection module 70, a second input end of the rectifier bridge BD is connected to the neutral line N, a first output end of the rectifier bridge BD is connected to the constant voltage control module 20, and a second output end of the rectifier bridge BD is grounded.
In the present embodiment, the rectifier bridge BD may be a common bridge rectifier circuit, which can convert the input 50/60HZ voltage of sine wave into 100/120HZ voltage waveform without negative half cycles.
In one embodiment, referring to fig. 6, a voltage dependent resistor RV is further disposed between the two output terminals of the rectifier module 10.
In one embodiment, referring to fig. 6, the overcurrent protection module 70 includes a fuse FR, a first end of the fuse FR is connected to the live line L, and a second end of the fuse FR is connected to the rectifier module 10.
In one embodiment, referring to fig. 6, the filter module 60 includes a third capacitor C3, wherein a first terminal of the third capacitor C3 is connected to the rectifier module 10, and a second terminal of the third capacitor C3 is connected to ground.
In one embodiment, referring to fig. 6, the constant voltage control module 20 includes: a first inductor L1, a second inductor L2, a first capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first diode D1, a second diode D2, a first switch tube Q1 and a constant voltage driving chip U1, wherein a first end of the first inductor L1 and a first end of the first resistor R1 are connected to the rectifying module 10, a second end of the first inductor L1, a second end of the first resistor R1, a first end of the first capacitor C1 and a first end of the second inductor L1 are connected to each other, a second end of the first capacitor C1 is connected to ground, a second end of the second inductor L1, an anode of the first diode D1 and a first end of the first switch tube Q1 are connected to each other, a control end of the first switch tube Q1, a control end of the second diode C1, an anode of the first end of the first diode D1 and a first end of the first switch tube R1, a first end of the first diode D1, a first diode D1 and a first end of the first switch tube R1 are connected to the common terminal of the first switch tube R1, A first end of the fourth resistor R4 is commonly connected to the current detection pin CS of the constant voltage driving chip U1, a power switch output pin GATE of the constant voltage driving chip, a cathode of the second diode D2, and a second end of the second resistor R2 are commonly connected, a switching frequency setting pin Tonmax of the constant voltage driving chip U1 is connected to a first end of the fifth resistor R5, a threshold setting pin RTH of the constant voltage driving chip U1 is connected to a first end of the sixth resistor R6, a ground pin GND of the constant voltage driving chip U1, a second end of the third resistor R3, a second end of the fourth resistor R4, a second end of the fifth resistor R5, and a second end of the sixth resistor R6 are commonly connected, and a feedback pin FB of the constant voltage driving chip U1 forms a voltage feedback signal end of the constant voltage control module 20, and is used for receiving and sampling the voltage of the light source assembly 30 to obtain a voltage feedback signal.
In this embodiment, the constant voltage driving chip U1 and its peripheral circuits constitute a constant voltage driving circuit for outputting a constant voltage driving signal to drive the light source assembly 30 to light up, and the load voltage feedback module 80 samples and feeds back the voltage at the two ends of the light source assembly 30 to the constant voltage driving chip U1, the sixth resistor R6 provides a threshold voltage for the constant voltage driving chip, the fifth resistor R5 is used to set the switching frequency of the constant voltage driving chip U1, and the third resistor R3 and the fourth resistor R4 constitute a current detection circuit to detect the current of the constant voltage driving signal.
In one embodiment, the first switch Q1 is an N-type MOS transistor.
In one embodiment, referring to fig. 6, the linear dimming driving module 40 includes: the linear dimming chip U2, the second capacitor C2, the seventh resistor R7, the eighth resistor R8 and the ninth resistor R9; an input pin VIN of the linear dimming chip U2 is connected to the positive terminal of the light source assembly 30, a DRAIN pin DRAIN of the linear dimming chip U2 is connected to the negative terminal of the light source assembly 30, a brightness control pin DIM of the linear dimming chip U2, a first terminal of the second capacitor C2, and a first terminal of the seventh resistor R7 are commonly connected to the main control module 50, a current detection pin CS of the linear dimming chip U2, a first terminal of the eighth resistor R8, and a first terminal of the ninth resistor R9 are commonly connected, and a ground pin GND of the linear dimming chip U2, a second terminal of the seventh resistor R7, a second terminal of the eighth resistor R8, and a second terminal of the ninth resistor R9 are commonly connected.
In this embodiment, in the linear dimming driving module 40, the linear dimming chip U2 and its peripheral circuits form a linear constant current circuit, which can set the maximum output current of the light source assembly 30, and the circuit can receive multiple PWM signals to control the switching tubes inside the chip for switching, thereby achieving the effect of color mixing.
In one embodiment, referring to fig. 6, the load voltage feedback module 80 includes: a tenth resistor R10 and an eleventh resistor R11, wherein a first end of the tenth resistor R10 is connected to the positive terminal of the light source assembly 30, a second end of the tenth resistor R10 and a first end of the eleventh resistor R11 are commonly connected to the constant voltage control module 20, and a second end of the eleventh resistor R11 is connected to the negative terminal of the light source assembly 30.
In this embodiment, the tenth resistor R10 and the eleventh resistor R11 form a voltage divider circuit, which is used to sample the voltage across the light source assembly 30 and send the collected voltage feedback signal to the constant voltage control module 20.
In the present embodiment, the load voltage feedback module 80 provides the reference voltage to the constant voltage control module 20 to control the voltage output by the constant voltage control module 20, so as to reduce the voltage difference between the constant voltage output terminal and the load terminal, and finally reduce the voltage difference between the input and the output of the linear dimming driving module 40 to achieve high efficiency.
In one embodiment, referring to fig. 7, the power module 90 includes: a fifth diode D5, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a third diode D3, a fourth diode D4, a third inductor L3, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14 and a power supply chip U3; an anode of the fifth diode D5 is connected to the rectifying module 10, a cathode of the fifth diode D5 and a first end of the fourth capacitor C4 are commonly connected to the DRAIN pin DRAIN of the power supply chip U3, the current detection pin CS of the power supply chip U3, a first end of the twelfth resistor R12 and a first end of the thirteenth resistor R13, the ground pin GND of the power supply chip U3, a second end of the twelfth resistor R12, a second end of the thirteenth resistor R13, a cathode of the third diode D3, a first end of the third inductor L3 and a first end of the fifth capacitor C5 are commonly connected, a power supply pin of the power supply chip U3, a cathode of the fourth diode D4 and a second end of the fifth capacitor C5 are commonly connected, an anode of the fourth diode D4, a second end of the third inductor L3, a first end of the sixth capacitor C6 and a first end of the fourteenth resistor R5 are commonly connected to the master control module 50, and a first end of the fourth capacitor C5857323 and a second end of the fourth capacitor C57324, The second terminal of the sixth capacitor C6 and the second terminal of the fourteenth resistor R14 are connected to ground.
In this embodiment, the power supply chip U3 and its peripheral circuits form a voltage conversion circuit for converting the dc voltage to supply power to the main control module 50.
In one embodiment, the main control module 50 may be an RF module, and the power supply module 90 may be a 3.3V voltage regulator circuit, and the stably outputted 3.3V voltage is provided to the RF module.
In one embodiment, the main control module 50 may be a rf module circuit including a peripheral crystal oscillator circuit and an antenna impedance LC matching circuit, and the module outputs multiple PWM signals to the linear constant current circuit to achieve intelligent dimming and color modulation control.
The embodiment of the application also provides a dimming driving device, which comprises the dimming driving circuit.
An embodiment of the present application further provides a lamp, including: a light source assembly 30; and a dimming driving circuit as described in any one of the above, the dimming driving circuit being connected to the light source assembly 30.
In one embodiment, the light source assembly 30 includes multiple light-emitting units, and the color temperatures of the multiple light-emitting units are different from each other.
In one embodiment, the light source assembly 30 may be a multi-channel color-mixed light source, and the multi-channel light-emitting units correspond to multiple color temperatures, wherein the multi-channel light-emitting units may be connected in a common anode connection manner or in a common cathode connection manner.
In this embodiment, the multi-path light emission in the light source module 30 can adopt a common anode connection method or a common cathode solution method to output a multi-path color-mixed light source.
In one embodiment, the multi-path light emitting unit includes a red light source, a green light source, a blue light source, and a white light source, the red light source, the green light source, the blue light source, and the white light source are disposed in parallel, and the red light source, the green light source, the blue light source, and the white light source are respectively connected to the plurality of light source modulation signal terminals of the linear dimming driving module 40 in a one-to-one correspondence manner, so that the linear dimming driving module 40 controls the current of each light source.
The application provides a lamps and lanterns's beneficial effect lies in: compared with the prior art, the dimming driving circuit in the application comprises a rectifying module, a constant voltage control module, a main control module and a linear dimming driving module, wherein alternating current is accessed through the rectifying module and is converted into direct current, the constant voltage control module converts the direct current into a constant voltage driving signal through a switching power supply and sends the constant voltage driving signal to a light source assembly, and samples the voltage of the light source assembly to obtain a voltage feedback signal so as to adjust the constant voltage driving signal, the linear dimming driving module controls the output current of each path of light emitting unit in the light source assembly according to a pulse width modulation signal output by the main control module so as to adjust the brightness and color temperature of the light source assembly, wherein the front-stage circuit adopts a constant voltage circuit, the rear-stage circuit adopts a low-voltage-difference linear scheme, and simultaneously acquires a voltage signal of the light source assembly to control the output voltage of the front stage, and controls the input-output voltage difference of linear driving to be minimum, and the driving loss is reduced, and the efficiency of the whole dimming driving circuit is finally improved.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A dimming driving circuit connected to a light source assembly, the dimming driving circuit comprising:
the rectifier module is used for accessing alternating current and converting the alternating current into direct current;
the constant voltage control module is connected with the rectification module and used for converting the direct current into a constant voltage driving signal through a switching power supply and sending the constant voltage driving signal to the light source assembly, and sampling the voltage of the light source assembly to obtain a voltage feedback signal so as to adjust the constant voltage driving signal;
the main control module is used for outputting pulse width modulation signals;
and the linear dimming driving module is connected with the main control module and the light source assembly and used for receiving the pulse width modulation signals and controlling the output current of each path of light-emitting unit in the light source assembly according to the pulse width modulation signals so as to adjust the brightness and the color temperature of the light source assembly.
2. The dimming drive circuit of claim 1, further comprising:
and the filtering module is respectively connected with the rectifying module and the constant voltage control module and is used for filtering the direct current output by the rectifying module and outputting the direct current voltage after filtering to the constant voltage control module.
3. The dimming drive circuit of claim 1, further comprising:
and the overcurrent protection module is connected with the rectification module and used for carrying out overcurrent protection on the alternating current.
4. The dimming drive circuit of claim 1, further comprising:
and the load voltage feedback module is respectively connected with the constant voltage control module and the light source assembly and used for sampling the working voltage of the light source assembly and generating the voltage feedback signal.
5. The dimming driving circuit of claim 1, wherein the linear dimming driving module is further connected to the constant voltage control module for sending the voltage feedback signal to the constant voltage control module according to the pulse width modulation signal.
6. The dimming drive circuit of claim 1, further comprising:
and the power supply module is respectively connected with the rectifying module and the main control module and used for receiving the direct current and converting the voltage of the direct current so as to supply power to the main control module.
7. The dimming driving circuit according to claim 1, wherein the constant voltage control module is a Boost circuit, a Buck circuit, a flyback circuit, a Buck-Boost circuit, an LLC circuit, an LCC circuit, or a forward circuit.
8. A dimming driving apparatus comprising the dimming driving circuit as claimed in any one of claims 1 to 7.
9. A light fixture, comprising: a light source assembly; and a dimming driving circuit as claimed in any one of claims 1 to 7, connected to the light source assembly.
10. The luminaire of claim 9, wherein the light source assembly comprises multiple light-emitting units, and the multiple light-emitting units have different color temperatures.
CN202120447191.1U 2021-03-02 2021-03-02 Dimming drive circuit, dimming drive device and lamp Active CN215222534U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116321580A (en) * 2023-05-25 2023-06-23 杭州海康威视数字技术股份有限公司 LED driving device, method and equipment
CN116546692A (en) * 2023-06-15 2023-08-04 Tcl华星光电技术有限公司 Light-emitting substrate and driving method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116321580A (en) * 2023-05-25 2023-06-23 杭州海康威视数字技术股份有限公司 LED driving device, method and equipment
CN116321580B (en) * 2023-05-25 2023-08-29 杭州海康威视数字技术股份有限公司 LED driving device, method and equipment
CN116546692A (en) * 2023-06-15 2023-08-04 Tcl华星光电技术有限公司 Light-emitting substrate and driving method
CN116546692B (en) * 2023-06-15 2023-10-13 Tcl华星光电技术有限公司 Light-emitting substrate and driving method

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