CN213028625U - Dimming control circuit, LED driving power supply and LED lamp - Google Patents

Dimming control circuit, LED driving power supply and LED lamp Download PDF

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Publication number
CN213028625U
CN213028625U CN202021654287.7U CN202021654287U CN213028625U CN 213028625 U CN213028625 U CN 213028625U CN 202021654287 U CN202021654287 U CN 202021654287U CN 213028625 U CN213028625 U CN 213028625U
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resistor
dimming
circuit
capacitor
power supply
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周峰
杨林
杨海涛
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Longhorn Lighting Co ltd
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Longhorn Lighting 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
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Abstract

A dimming control circuit, an LED driving power supply and an LED lamp detect the connection state of a dimming component through a dimming detection circuit to generate a dimming detection signal; the phase line detection circuit detects a phase line circuit signal of an input power supply to generate a phase line detection signal; the control circuit generates a first dimming control signal according to the dimming detection signal, generates a second dimming control signal according to the phase line detection signal, and switches the dimming mode according to the dimming detection signal; the rectifying circuit rectifies the power supply signal to generate a rectified power supply signal; the driving circuit adjusts the rectified power supply signal according to the first dimming control signal or the second dimming control signal to generate a driving signal to drive the light source module to emit light; the dimming module is switched to be set to be in the 0-10V dimming mode when being connected, and is switched to be in the segmented dimming mode when not being connected, so that 0-10V dimming and segmented dimming are compatible, the application requirements of 0-10V dimming and segmented dimming of a user are met, and the dimming convenience is improved.

Description

Dimming control circuit, LED driving power supply and LED lamp
Technical Field
The application belongs to the technical field of lighting drive, and particularly relates to a dimming control circuit, an LED driving power supply and an LED lamp.
Background
At present, the conventional segmented dimming scheme is mainly based on the analog integrated circuit IC to identify the switching times so as to adjust the fixed several current outputs. 0/1-10V dimming power supply is provided with a control chip, and the current of PWM signals with different duty ratios, which is greater than 100khz, is controlled to be output according to the voltage change of 0/1-10V output by a 0-10V or 1-10V dimmer, so that the dimming is realized by changing the current. The traditional 0-10V dimming controller does not give consideration to switch sectional dimming and cannot identify the ON/OFF (ON/OFF) access state of a phase line. The dimming power supply ON the market is either segmented dimming or stepless dimming, and is not compatible with the segmented dimming in the phase line ON/OFF state and the 0-10V dimming, so that the dimming control circuit needs to be replaced or changed when a user needs different dimming modes, the cost is increased, and the convenience is poor.
Therefore, the traditional dimming technical scheme has the problems that the phase line on/off state segmented dimming and the 0-10V dimming cannot be compatible at the same time, and the dimming convenience is poor.
SUMMERY OF THE UTILITY MODEL
The application aims to provide a dimming control circuit, an LED driving power supply and an LED lamp, and aims to solve the problems that sectional dimming and 0-10V dimming in a phase line on/off state cannot be compatible simultaneously and dimming convenience is poor in the traditional dimming technical scheme.
A first aspect of the embodiments of the present application provides a dimming control circuit, which is connected to an input power source and a light source module, the dimming control circuit includes:
a dimming detection circuit configured to detect an access state of the dimming component to generate a dimming detection signal;
the phase line detection circuit is configured to detect a phase line power signal of the input power supply to generate a phase line detection signal;
the control circuit is connected with the dimming detection circuit and the phase line detection circuit and is configured to generate a first dimming control signal according to the dimming detection signal and switch a dimming mode according to the dimming detection signal or generate a second dimming control signal according to the phase line detection signal;
a rectifying circuit configured to rectify a power supply signal provided by the input power supply to generate a rectified power supply signal;
and the driving circuit is connected with the rectifying circuit, the control circuit and the light source module and is configured to regulate the rectifying power supply signal according to the first dimming control signal or the second dimming control signal so as to generate a driving signal to drive the light source module to emit light.
In one embodiment, the dimming control circuit further includes:
and the protection circuit is connected with the input power supply and the rectifying circuit and is configured to perform overvoltage protection and short-circuit protection on the input power supply.
In one embodiment, the dimming control circuit further includes:
and the filter circuit is connected with the rectifying circuit and the driving circuit and is configured to carry out filtering and noise reduction processing on the rectified power supply signal.
In one embodiment, the dimming control circuit further includes:
and the photoelectric isolation circuit is connected with the control circuit and the driving circuit and is configured to perform photoelectric isolation processing on the first dimming control signal and the second dimming control signal.
In one embodiment, the dimming detection circuit includes: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a first voltage stabilizing diode, a first capacitor, a second capacitor, a third capacitor and a first triode; wherein a first end of the first resistor is connected to a cathode of the first diode, an anode of the first diode is connected to a power ground, the first diode is connected to the dimming component in parallel, a second end of the first resistor is connected to a first end of the second resistor, a first end of the first capacitor, a base of the first triode, a first end of the third resistor, and a cathode of the first zener diode, a second end of the second resistor and a collector of the first triode are connected to a first direct current terminal, an emitter of the first triode is connected to a second end of the third resistor, a first end of the second capacitor, and a first end of the fourth resistor, a second end of the fourth resistor is connected to a first end of the fifth resistor and a first end of the sixth resistor, a second end of the sixth resistor and a first end of the third capacitor are connected to the control circuit in common, the second end of the first capacitor, the anode of the first voltage stabilizing diode, the second end of the second capacitor, the second end of the fifth resistor and the second end of the third capacitor are connected with a power ground.
In one embodiment, the control circuit comprises: the microprocessor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor; wherein, the first pulse width modulation end of the microprocessor is connected with the dimming detection circuit, the first analog input end of the microprocessor, the second analog input end of the microprocessor and the third analog input end of the microprocessor are connected with the phase line detection circuit in common, the first analog input end of the microprocessor is connected with the first end of the fourth capacitor, the second analog input end of the microprocessor is connected with the first end of the fifth capacitor, the third analog input end of the microprocessor is connected with the first end of the sixth capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the second end of the sixth capacitor are connected with the power ground, the power end of the microprocessor and the first end of the seventh capacitor are connected with the second direct current end in common, the second end of the seventh capacitor and the analog ground end of the microprocessor are connected with the power ground, and the second pulse width modulation end of the microprocessor is connected with the photoelectric isolation circuit.
In one embodiment, the phase line detection circuit comprises a plurality of phase line detection units, the input ends of the phase line detection units are respectively connected with a plurality of phase lines of an input power supply in a one-to-one correspondence manner, and the output ends of the phase line detection units are connected with the control circuit; wherein, one of the phase line detecting units includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a second diode, a third zener diode, a ninth capacitor, a first field effect transistor, and a second photocoupler; an anode of the second diode is connected to a first phase line of the input power supply, a cathode of the second diode is connected to a first end of the fourteenth resistor, a second end of the fourteenth resistor is connected to a first end of the fifteenth resistor, a second end of the fifteenth resistor is connected to a first end of the ninth capacitor, a first end of the sixteenth resistor, a cathode of the third zener diode, and a gate of the first fet, a second end of the ninth capacitor, a second end of the sixteenth resistor, an anode of the third zener diode, and a source of the first fet are connected to a power ground, a drain of the first fet is connected to a cathode of the second photocoupler, an anode of the second photocoupler is connected to a first end of the seventeenth resistor, and a second end of the seventeenth resistor is connected to a fourth dc terminal, and the collector of the second photoelectric coupler is connected with a second direct current end, the emitter of the second photoelectric coupler is connected with the first end of the eighteenth resistor, and the second end of the eighteenth resistor is connected with a power ground.
In one embodiment, the optoelectronic isolation circuit comprises: the circuit comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an eighth capacitor, a second voltage stabilizing diode, a second triode and a first photoelectric coupler; wherein a first end of the seventh resistor is connected to the control circuit, a first end of the seventh resistor is connected to an anode of the first photoelectric coupler, a collector of the first photoelectric coupler is connected to a cathode of the second zener diode, a first end of the eighth resistor, a first end of the twelfth resistor, and a base of the second triode, an emitter of the first photoelectric coupler, an anode of the second zener diode, and a second end of the eighth resistor are connected to a first end of the eighth capacitor, a second end of the eighth capacitor and a cathode of the first photoelectric coupler are connected to a potential ground, a collector of the second triode is connected to a first end of the eleventh resistor and a first end of the tenth resistor, and a second end of the tenth resistor and a first end of the ninth resistor are commonly connected to the driving circuit, an emitter of the second triode and a second end of the ninth resistor are connected with a power ground, a second end of the twelfth resistor is connected with a second end of the eleventh resistor and a first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected with a third direct current end.
A second aspect of the present application provides an LED driving power supply including a dimming control circuit as claimed in any one of the above.
A third aspect of the present application provides an LED luminaire, which includes an LED light source module; and, the dimming control circuit or the above-mentioned LED driving power supply of any one of the above. Compared with the prior art, the embodiment of the utility model beneficial effect who exists is: the dimming control circuit, the LED driving power supply and the LED lamp detect the access state of the dimming component through the dimming detection circuit to generate the dimming detection signal; the phase line detection circuit detects a phase line electric power signal of an input power supply to generate a phase line detection signal; the control circuit generates a first dimming control signal according to the dimming detection signal or generates a second dimming control signal according to the phase line detection signal, and switches the dimming mode according to the dimming detection signal; the rectifying circuit rectifies a power supply signal provided by an input power supply to generate a rectified power supply signal; the driving circuit adjusts the rectified power supply signal according to the first dimming control signal or the second dimming control signal to generate a driving signal to drive the light source module to emit light; the dimming control circuit has the advantages that the dimming mode is switched to be the 0-10V dimming mode when the access dimming component is detected, dimming is performed on the light source module, the dimming mode is switched to be the sectional dimming mode when the access dimming component is not detected, the second dimming control signal is generated according to the phase line detection signal to control the sectional dimming of the light source module, the 0-10V dimming and the sectional dimming are compatible to the same circuit, the application requirements of the user on the 0-10V dimming and the sectional dimming are met, the dimming convenience is improved, the cost is reduced, and the circuit scheme is simple and reliable.
Drawings
Fig. 1 is a schematic structural diagram of a dimming control circuit according to an embodiment of the present application;
fig. 2 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of another structure of a dimming control circuit according to an embodiment of the present disclosure;
fig. 5 is a schematic circuit diagram of an example of a dimming control circuit 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, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed 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.
Fig. 1 shows a schematic structural diagram of a dimming control circuit provided in a first embodiment of the present application, and for convenience of description, only the parts related to the present embodiment are shown, and detailed descriptions are as follows:
a dimming control circuit is connected with an input power supply 01 and a light source module 100, and comprises: dimming detection circuit 11, phase line detection circuit 12, control circuit 13, rectifier circuit 14 and drive circuit 15.
A dimming detection circuit 11 configured to detect an access state of the dimming component 02 to generate a dimming detection signal; a phase line detection circuit 12 configured to detect a phase line power signal of the input power supply 01 to generate a phase line detection signal; a control circuit 13, connected to the dimming detection circuit 11 and the phase line detection circuit 12, configured to generate a first dimming control signal according to the dimming detection signal, or generate a second dimming control signal according to the phase line detection signal, and switch the dimming mode according to the dimming detection signal; a rectifying circuit 14 configured to rectify a power supply signal supplied from an input power supply 01 to generate a rectified power supply signal; the driving circuit 15 is connected to the rectifying circuit 14, the control circuit 13 and the light source module 100, and configured to adjust the rectified power signal according to the first dimming control signal or the second dimming control signal to generate a driving signal to drive the light source module 100 to emit light.
In one embodiment, the input power source 01 may be an ac power source, and outputs ac power, such as 220V or 110V ac power. The dimming control circuit can be applied to a circuit corresponding to a single-phase electric double-live-wire input power supply or a three-phase electric input power supply. Optionally, the dimming component 02 is a 0-10V dimmer. The light source module 100 is an LED light source module. Detecting whether a 0-10V dimmer is connected in a circuit for driving the light source module 100 to emit light through the dimming detection circuit 11, correspondingly generating a dimming detection signal and outputting the dimming detection signal to the control circuit 13, wherein the control circuit 13 judges whether the 0-10V dimmer is connected according to whether a voltage value corresponding to the dimming detection signal is greater than a preset voltage threshold, for example, when the voltage value corresponding to the dimming detection signal is less than the preset voltage threshold, the 0-10V dimmer is judged to be connected, the dimming mode is set to be a 0-10V dimming mode, and the segmented dimming mode is shielded; otherwise, when the voltage value corresponding to the dimming detection signal is higher than the preset voltage threshold value, it is determined that the 0-10V dimmer is not connected, and the dimming mode is switched to the segmented dimming mode. In the 0-10V dimming mode, a user operates the 0-10V dimmer, generates a corresponding dimming detection signal through the dimming detection circuit 11, and the control circuit 13 generates a first dimming control signal according to the dimming detection signal to control the driving circuit 15 to adjust the driving signal output to the light source module 100, thereby implementing 0-10V dimming, wherein the 0-10V dimming mode includes analog dimming and PWM dimming. In the segment dimming mode, the phase line detection circuit 12 detects a phase line power signal of the input power supply 01, for example, detects a current signal, a voltage signal, and the like of the phase line, so as to obtain information such as a phase difference, an overlap, an amplitude, a phase line on/off state, and the like between the phase lines, so as to generate a phase line detection signal; the control circuit 13 generates a second dimming control signal according to the phase line detection signal to control the driving circuit 15 to perform a step dimming on the driving signal output to the light source module 100, so as to implement a step dimming, and in the step dimming mode, if the dimming detection signal is detected, the dimming mode is switched to the 0-10V dimming mode. Optionally, the dimming detection signal is an analog voltage signal.
According to the embodiment of the application, the dimming mode can be switched and set to be the 0-10V dimming mode when the dimming component is connected into the circuit, the driving dimming circuit of the light source module is compatible with 0-10V dimming and phase line on/off state sectional dimming at the same time, the application requirements that a user needs two dimming modes of 0-10V dimming and sectional dimming are met, the dimming convenience is improved, the cost is reduced, and the circuit scheme is simple and reliable.
Referring to fig. 2, in one embodiment, the dimming control circuit 13 further includes: a protection circuit 16.
The protection circuit 16 is connected to the input power supply 01 and the rectifier circuit 14, and configured to perform overvoltage protection and short-circuit protection on the input power supply 01.
In specific implementation, the protection circuit 16 includes a fuse and a voltage dependent resistor, and the voltage dependent resistor is used for clamping voltage when the circuit bears overvoltage, so as to absorb redundant current to protect a sensitive device; the fuse can be fused to cut off the current when the current in the circuit abnormally rises to a certain height and heat, so that over-temperature protection and short-circuit protection are realized, the safe operation of the circuit is guaranteed, and the safety and reliability of the dimming control circuit are improved.
Referring to fig. 3, in one embodiment, the dimming control circuit 13 further includes: and a filter circuit 17.
And a filter circuit 17 connected to the rectifier circuit 14 and the driver circuit 15 and configured to filter and reduce noise of the rectified power supply signal.
In specific implementation, the filter circuit 17 includes an active filter circuit and a passive filter circuit, such as a passive RC filter circuit and an LC filter circuit, and can perform filtering and noise reduction processing on the rectified power signal output by the rectifying circuit 14 to filter noise interference in the rectified power signal, output a stable and smooth rectified power signal to the driving circuit 15, perform voltage conversion and voltage stabilization processing on the rectified power signal by the driving circuit 15 to generate a driving signal, and drive the light source module 100 to emit light, so that the precision of driving the light source module 100 to emit light is improved, and the stability and reliability of the dimming control circuit are also improved.
Referring to fig. 4, in one embodiment, the dimming control circuit further includes: a photo-isolation circuit 18.
And a photoelectric isolation circuit 18 connected to the control circuit 13 and the driving circuit 15, and configured to perform photoelectric isolation processing on the first dimming control signal and the second dimming control signal.
In specific implementation, the photoelectric isolation circuit 18 can perform photoelectric coupling isolation processing on the first dimming control signal and the second dimming control signal, so that the optical signal and the electric signal are not interfered with each other, the respective normal work of a power supply and a light source is ensured, the electric insulation capacity and the anti-interference capacity of the circuit are improved, the circuit and the wire are effectively protected, and the safety and reliability of the dimming control circuit are improved.
Referring to fig. 5, in one embodiment, the dimming detection circuit 11 includes: the circuit comprises 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 first zener diode Z1, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first triode Q1; wherein, a first end of the first resistor R1 is connected with a cathode of the first diode D1, an anode of the first diode D1 is connected with the power ground, the first diode D1 is connected with the dimming component 02 in parallel, a second end of the first resistor R1 is connected with a first end of the second resistor R2, a first end of the first capacitor C1, a base of the first triode Q1, a first end of the third resistor R3 and a cathode of the first zener diode Z1, a second end of the second resistor R2 and a collector of the first triode Q1 are connected with the first direct current end, an emitter of the first triode Q1 is connected with a second end of the third resistor R3, a first end of the second capacitor C2 and a first end of the fourth resistor R4, a second end of the fourth resistor R4 is connected with a first end of the fifth resistor R5 and a first end of the sixth resistor R6, a second end of the sixth resistor R6 and a first end of the third capacitor C3 are connected with the control circuit, the second terminal of the first capacitor C1, the anode of the first zener diode Z1, the second terminal of the second capacitor C2, the second terminal of the fifth resistor R5, and the second terminal of the third capacitor C3 are connected to ground.
In a specific implementation, the first dc terminal outputs a first dc power, and the first dc power may be a 12V dc power.
Referring to fig. 5, in one embodiment, the control circuit 13 includes: a microprocessor U1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, and a seventh capacitor C7; wherein, the first PWM terminal PWM5/AN7 of the microprocessor U1 is connected to the dimming detection circuit 11, the first analog input terminal AN0 of the microprocessor U1, the second analog input terminal AN1 of the microprocessor U1 and the third analog input terminal AN2 of the microprocessor U1 are connected to the phase detection circuit 12 in common, the first analog input terminal AN0 of the microprocessor U1 is connected to the first terminal of the fourth capacitor C4, the second analog input terminal AN1 of the microprocessor U1 is connected to the first terminal of the fifth capacitor C5, the third analog input terminal AN2 of the microprocessor U1 is connected to the first terminal of the sixth capacitor C6, the second terminal of the fourth capacitor C4, the second terminal of the fifth capacitor C5 and the second terminal of the sixth capacitor C6 are connected to the ground, the power supply terminal VDD of the microprocessor U1 and the first terminal of the seventh capacitor C7 are connected to the second dc power supply terminal, the second terminal of the seventh capacitor C7 and the analog ground supply terminal U34 are connected to the microprocessor U1, the second PWM4/AN6 of the microprocessor U1 is connected to the photo isolator 18.
In a specific implementation, the second dc terminal outputs a second dc power, and the second dc power may be a 5V dc power.
Referring to fig. 5, in one embodiment, the optoelectronic isolation circuit 18 includes: a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, an eighth capacitor C8, a second zener diode Z2, a second triode Q2 and a first photocoupler U2; wherein, the first end of the seventh resistor R7 is connected with the control circuit 13, the first end of the seventh resistor R7 is connected with the anode of the first photocoupler U2, the collector of the first photocoupler U2 is connected with the cathode of the second zener diode Z2, the first end of the eighth resistor R8, the first end of the twelfth resistor R12 and the base of the second triode Q2, the emitter of the first photocoupler U2, the anode of the second zener diode Z2, the second end of the eighth resistor R8 is connected with the first end of the eighth capacitor C8, the second end of the eighth capacitor C8 and the cathode of the first photocoupler U2 are connected with the potential ground, the collector of the second triode Q2 is connected with the first end of the eleventh resistor R11 and the first end of the tenth resistor R10, the second end of the tenth resistor R10 and the first end of the ninth resistor R9 are connected with the drive circuit 15, the emitter of the second resistor R2 and the emitter of the ninth resistor R9 are connected with the ninth resistor R9, the second end of the twelfth resistor R12 is connected with the second end of the eleventh resistor R11 and the first end of the thirteenth resistor R13, and the second end of the thirteenth resistor R13 is connected with the third direct current end.
In a specific implementation, the third dc terminal outputs a third dc, and the third dc may be V +.
Referring to fig. 5, in one embodiment, the phase line detection circuit 12 includes a plurality of phase line detection units, input ends of the phase line detection units are respectively connected to a plurality of phase lines of the input power supply 01 in a one-to-one correspondence manner, and output ends of the phase line detection units are connected to the control circuit 13; wherein, a phase line detecting unit 12-1 includes: a fourteenth resistor R21, a fifteenth resistor R22, a sixteenth resistor R23, a seventeenth resistor R24, an eighteenth resistor R25, a second diode D01, a third zener diode Z01, a ninth capacitor C01, a first field effect transistor Q01 and a second photocoupler U01.
An anode of the second diode D01 is connected to the first phase line L _1 of the input power source 01, a cathode of the second diode D01 is connected to a first end of a fourteenth resistor R21, a second end of the fourteenth resistor R21 is connected to a first end of a fifteenth resistor R22, a second end of a fifteenth resistor R22 is connected to a first end of a ninth capacitor C01, a first end of a sixteenth resistor R23, a cathode of a third zener diode Z01 and a gate of a first field effect transistor Q01, a second end of the ninth capacitor C01, a second end of a sixteenth resistor R23, an anode of the third zener diode Z01 and a source of the first field effect transistor Q01 are connected to the power ground, a drain of the first field effect transistor Q01 is connected to a cathode of a second photo coupler U01, an anode of the second photo coupler U01 is connected to a first end of a seventeenth resistor R24, a second end of the seventeenth resistor R24 is connected to a fourth dc terminal, a collector of the second photo coupler U01 is connected to a second dc terminal of the second photo coupler U362, an emitter of the second photocoupler U01 is connected to a first end of an eighteenth resistor R25, and a second end of the eighteenth resistor R25 is connected to power ground.
In a specific implementation, the fourth dc terminal provides a fourth dc, and the fourth dc may be VCC. The phase line detection circuit 12 includes a plurality of phase line detection units, the number of which can be determined according to the type of the input power supply 01, for example, the input power supply 01 of a single-phase electric dual-live wire is correspondingly provided with two phase line detection units, the two phase line detection units respectively detect the power signals of the two live wires, and correspondingly and respectively generate a first sub-phase line detection signal (DIM1) and a second sub-phase line detection signal (DIM 2); when the input power supply 01 is a three-phase power input circuit, three phase line detection units (e.g., a first phase line detection unit 12-1, a second phase line detection unit 12-2, and a third phase line detection unit 12-3) are correspondingly provided, which respectively detect power signals of the first phase line L _1, the second phase line L _2, and the first phase line L _3, and correspondingly respectively generate a first sub-phase line detection signal (DIM1), a second sub-phase line detection signal (DIM2), and a third sub-phase line detection signal (DIM 3); the phase line detection signal includes a first sub-phase line detection signal (DIM1), a second sub-phase line detection signal (DIM2), and a third sub-phase line detection signal (DIM 3). In the step dimming mode, the phase line detection circuit 12 converts the power signal of the phase lines (L _1, L _2, and L _3) of the input power 01 into a low-voltage digital logic square wave signal (the first sub-phase line detection signal DIM1, the second sub-phase line detection signal DIM2, and the third sub-phase line detection signal DIM3), and outputs the low-voltage digital logic square wave signal to the microprocessor U1 for logic analysis, comparison, and judgment, so as to determine the dimming level of the step dimming, and correspondingly outputs the second dimming control signal to the driving circuit 15, so as to control the driving circuit 15 to adjust the driving signal output to the light source module 100, so as to drive the light source module 100 to the corresponding brightness level. Taking the input power supply 01 as a single-phase electric double-live-wire input power supply 01 as an example, two phase line detection units are arranged corresponding to the input power supply 01 to respectively generate a first sub-phase line detection signal (DIM1) and a second sub-phase line detection signal (DIM2), the ON/OFF states of the two live wires are respectively four states of ON-ON, OFF-ON, ON-OFF and OFF-OFF, and the corresponding three brightness levels can be set to be 100%, 50% and 0%, so that the segmented dimming of the three brightness levels is realized.
In specific implementation, the circuit composition and structure of other phase line detection units are the same as those of the phase line detection unit 12-1, and the working principle can refer to the phase line detection unit 12-1.
The operation of the dimming control circuit will be briefly explained in conjunction with fig. 5:
the dimming detection circuit 11 detects the access state of the dimming component 02 (e.g., a 0-10V dimmer) to determine whether to access the dimmer, because when the dimming detection circuit 11 detects that the 0-10V dimmer is accessed into the circuit, that is, the 0-10V dimmer is accessed to the DIM + terminal and the DIM-terminal, the voltage value corresponding to the dimming detection signal output from the two terminals of the third capacitor C3 is lower than the voltage value corresponding to the dimming detection signal output from the two terminals of the third capacitor C3 when the DIM + terminal and the DIM-terminal are not accessed to the 0-10V dimmer, that is, when the dimming detection circuit 11 detects that the 0-10V dimmer is accessed to the DIM + terminal and the DIM-terminal, the voltage value corresponding to the dimming detection signal output from the two terminals of the third capacitor C3 is lower than the preset voltage threshold; on the contrary, when the DIM + terminal and the DIM-terminal are not connected to the 0-10V dimmer, the voltage value corresponding to the dimming detection signal output from the two terminals of the third capacitor C3 is higher than the preset voltage threshold, so as to determine whether the dimmer is connected to the circuit. The microprocessor U1 in the control circuit 13 sets the dimming mode to 0-10V dimming mode after recognizing that the 0-10V dimmer is connected to the circuit once according to the dimming detection signal, and shields the segmented dimming mode, the user operates the 0-10V dimmer, outputs the corresponding dimming detection signal from the two ends of the third capacitor C3, the dimming detection signal carries the dimming information, the microprocessor U1 generates the first dimming control signal according to the dimming detection signal, and outputs the first dimming control signal from the second pulse width modulation end PWM4/AN6 of the microprocessor U1 to the first end of the seventh resistor R7 in the optoelectronic isolation circuit 18, performs optoelectronic isolation and other processing on the first dimming control signal through the optoelectronic isolation circuit 18, and outputs the first dimming control signal to the driving circuit 15, controls the driving circuit 15 to adjust the rectifying power supply signal so as to adjust the driving signal output to the light source module 100, the light source module 100 is dimmed; when the microprocessor U1 recognizes that no dimmer is connected according to the dimming detection signal, the dimming mode is switched to the segment dimming mode, the phase detection units in the phase detection circuit 12 respectively detect the power signals of the single-phase electric dual-hot wire or the three-phase electric wires (L _1, L _2, and L _3) to obtain the state information (such as on/off state, phase difference, amplitude, etc.) of the phase in the segment dimming mode, so as to generate the phase detection signals (such as DIM1, DIM2, DIM3), the microprocessor U1 generates the second dimming control signal according to the phase detection signals and outputs the second dimming control signal to the optical isolation circuit 18, performs optical-electrical isolation processing on the second dimming control signal through the optical isolation circuit 18 and outputs the second dimming control signal to the driving circuit 15, controls the driving circuit 15 to adjust the entire dimming power signal to output the driving signal of the corresponding level to drive the light source module 100 to emit light, thereby realizing segmented dimming; in the step dimming mode, if the dimmer is detected to be switched on, the microprocessor U1 immediately switches to the 0-10V dimming mode.
A second aspect of the present application provides an LED driving power supply including the dimming control circuit as described above.
In specific implementation, the LED driving power supply comprises an input power supply 01, two dimming modes of 0-10V dimming and segmented dimming can be compatible at the same time, the application requirements of segmented dimming and dimmer continuous dimming for user phase line detection are met, the dimming convenience of the LED driving power supply is improved, the cost is reduced, the circuit scheme is simple and reliable, and the LED driving power supply is high in safety reliability and practicability.
A third aspect of the present application provides an LED luminaire, which includes an LED light source module; and, the dimming control circuit or the LED driving power supply as described above.
The LED lamp can be compatible with segmented dimming and 0-10V dimming simultaneously, so that different dimming mode requirements of users can be met simultaneously, the dimming convenience of the LED lamp is improved, the cost is reduced, and the safety reliability and the practicability of the LED lamp are high.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the functional units, modules and circuits described above are illustrated as being divided into different functional units, modules and circuits, and in practical applications, the functions may be divided into different functional units, modules and circuits according to different requirements, that is, the internal structure of the device may be divided into different functional units, modules or circuits to complete all or part of the functions described above. In the embodiments, each functional unit, module, and circuit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units, modules and circuits are only used for distinguishing one from another, and are not used for limiting the protection scope of the present application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.

Claims (10)

1. The utility model provides a dimming control circuit, is connected with input power and light source module, its characterized in that, dimming control circuit includes:
a dimming detection circuit configured to detect an access state of the dimming component to generate a dimming detection signal;
the phase line detection circuit is configured to detect a phase line power signal of the input power supply to generate a phase line detection signal;
the control circuit is connected with the dimming detection circuit and the phase line detection circuit and is configured to generate a first dimming control signal according to the dimming detection signal and switch a dimming mode according to the dimming detection signal or generate a second dimming control signal according to the phase line detection signal;
the rectification circuit is connected with the input power supply and the phase line detection circuit and is configured to rectify a power supply signal provided by the input power supply to generate a rectified power supply signal;
and the driving circuit is connected with the rectifying circuit, the control circuit and the light source module and is configured to regulate the rectifying power supply signal according to the first dimming control signal or the second dimming control signal so as to generate a driving signal to drive the light source module to emit light.
2. The dimming control circuit of claim 1, further comprising:
and the protection circuit is connected with the input power supply and the rectifying circuit and is configured to perform overvoltage protection and short-circuit protection on the input power supply.
3. The dimming control circuit of claim 1, further comprising:
and the filter circuit is connected with the rectifying circuit and the driving circuit and is configured to carry out filtering and noise reduction processing on the rectified power supply signal.
4. The dimming control circuit of claim 1, further comprising:
and the photoelectric isolation circuit is connected with the control circuit and the driving circuit and is configured to perform photoelectric isolation processing on the first dimming control signal and the second dimming control signal.
5. The dimming control circuit of claim 1, wherein the dimming detection circuit comprises: the circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first diode, a first voltage stabilizing diode, a first capacitor, a second capacitor, a third capacitor and a first triode; wherein a first end of the first resistor is connected to a cathode of the first diode, an anode of the first diode is connected to a power ground, the first diode is connected to the dimming component in parallel, a second end of the first resistor is connected to a first end of the second resistor, a first end of the first capacitor, a base of the first triode, a first end of the third resistor, and a cathode of the first zener diode, a second end of the second resistor and a collector of the first triode are connected to a first direct current terminal, an emitter of the first triode is connected to a second end of the third resistor, a first end of the second capacitor, and a first end of the fourth resistor, a second end of the fourth resistor is connected to a first end of the fifth resistor and a first end of the sixth resistor, a second end of the sixth resistor and a first end of the third capacitor are connected to the control circuit in common, the second end of the first capacitor, the anode of the first voltage stabilizing diode, the second end of the second capacitor, the second end of the fifth resistor and the second end of the third capacitor are connected with a power ground.
6. The dimming control circuit of claim 1, wherein the control circuit comprises: the microprocessor, a fourth capacitor, a fifth capacitor, a sixth capacitor and a seventh capacitor; wherein, the first pulse width modulation end of the microprocessor is connected with the dimming detection circuit, the first analog input end of the microprocessor, the second analog input end of the microprocessor and the third analog input end of the microprocessor are connected with the phase line detection circuit in common, the first analog input end of the microprocessor is connected with the first end of the fourth capacitor, the second analog input end of the microprocessor is connected with the first end of the fifth capacitor, the third analog input end of the microprocessor is connected with the first end of the sixth capacitor, the second end of the fourth capacitor, the second end of the fifth capacitor and the second end of the sixth capacitor are connected with the power ground, the power end of the microprocessor and the first end of the seventh capacitor are connected with the second direct current end in common, the second end of the seventh capacitor and the analog ground end of the microprocessor are connected with the power ground, and the second pulse width modulation end of the microprocessor is connected with the photoelectric isolation circuit.
7. The dimming control circuit according to claim 1, wherein the phase line detection circuit comprises a plurality of phase line detection units, input ends of the phase line detection units are respectively connected with a plurality of phase lines of an input power supply in a one-to-one correspondence manner, and output ends of the phase line detection units are connected with the control circuit; wherein, one of the phase line detecting units includes: a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a second diode, a third zener diode, a ninth capacitor, a first field effect transistor, and a second photocoupler; an anode of the second diode is connected to a first phase line of the input power supply, a cathode of the second diode is connected to a first end of the fourteenth resistor, a second end of the fourteenth resistor is connected to a first end of the fifteenth resistor, a second end of the fifteenth resistor is connected to a first end of the ninth capacitor, a first end of the sixteenth resistor, a cathode of the third zener diode, and a gate of the first fet, a second end of the ninth capacitor, a second end of the sixteenth resistor, an anode of the third zener diode, and a source of the first fet are connected to a power ground, a drain of the first fet is connected to a cathode of the second photocoupler, an anode of the second photocoupler is connected to a first end of the seventeenth resistor, and a second end of the seventeenth resistor is connected to a fourth dc terminal, and the collector of the second photoelectric coupler is connected with a second direct current end, the emitter of the second photoelectric coupler is connected with the first end of the eighteenth resistor, and the second end of the eighteenth resistor is connected with a power ground.
8. The dimming control circuit of claim 4, wherein the optoelectronic isolation circuit comprises: the circuit comprises a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, an eighth capacitor, a second voltage stabilizing diode, a second triode and a first photoelectric coupler; wherein a first end of the seventh resistor is connected to the control circuit, a first end of the seventh resistor is connected to an anode of the first photoelectric coupler, a collector of the first photoelectric coupler is connected to a cathode of the second zener diode, a first end of the eighth resistor, a first end of the twelfth resistor, and a base of the second triode, an emitter of the first photoelectric coupler, an anode of the second zener diode, and a second end of the eighth resistor are connected to a first end of the eighth capacitor, a second end of the eighth capacitor and a cathode of the first photoelectric coupler are connected to a potential ground, a collector of the second triode is connected to a first end of the eleventh resistor and a first end of the tenth resistor, and a second end of the tenth resistor and a first end of the ninth resistor are commonly connected to the driving circuit, an emitter of the second triode and a second end of the ninth resistor are connected with a power ground, a second end of the twelfth resistor is connected with a second end of the eleventh resistor and a first end of the thirteenth resistor, and a second end of the thirteenth resistor is connected with a third direct current end.
9. An LED driving power supply, characterized in that the LED driving power supply comprises the dimming control circuit according to any one of claims 1 to 8.
10. The LED lamp is characterized by comprising an LED light source module; and, the dimming control circuit of any one of claims 1 to 8 or the LED driving power supply of claim 9.
CN202021654287.7U 2020-08-10 2020-08-10 Dimming control circuit, LED driving power supply and LED lamp Active CN213028625U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114157816A (en) * 2021-11-15 2022-03-08 中国科学院深圳先进技术研究院 Light source control circuit and visual detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114157816A (en) * 2021-11-15 2022-03-08 中国科学院深圳先进技术研究院 Light source control circuit and visual detector
CN114157816B (en) * 2021-11-15 2022-10-25 中国科学院深圳先进技术研究院 Light source control circuit and visual detector

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