CN108322964B - LED driving power circuit - Google Patents
LED driving power circuit Download PDFInfo
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- CN108322964B CN108322964B CN201810286053.2A CN201810286053A CN108322964B CN 108322964 B CN108322964 B CN 108322964B CN 201810286053 A CN201810286053 A CN 201810286053A CN 108322964 B CN108322964 B CN 108322964B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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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
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Abstract
The invention discloses an LED driving power supply circuit which comprises a dimming unit, a control unit, a communication unit and a power supply unit, wherein the dimming unit is used for receiving a first dimming signal sent by a dimmer and performing filtering treatment; the control unit is connected with the dimming unit, and is used for outputting a second dimming signal to a power supply voltage according to the first dimming signal so as to perform dimming, and is used for communicating with the burner so as to output a corresponding feedback signal according to a burning signal sent by the burner; the communication unit is connected with the control unit and is used for feeding back a feedback signal output by the control unit to the burner; the power supply unit is connected with the control unit and is used for supplying power to the control unit; the light modulation unit, the control unit, the power supply unit and the communication unit are all connected to a multiplexing interface for connecting the light modulator or the burner. The interface and the connecting wire can be saved, the cost is reduced, and the structural design is optimized.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to an LED driving power supply circuit.
Background
Along with the development of science and technology and economy, the LED is widely applied to daily life of people, the LED has the advantages of energy conservation, environmental protection, long service life, high luminous efficiency and the like, and the LED driving power supply circuit takes up very important position in the technical field of LEDs as an energy source of the LED. The LED driving power supply circuit has a dimming function and a programmable function, wherein the dimming function specifically means that a dimmer is connected with a dimming interface of the LED driving power supply circuit, and the output current of the power supply is changed through voltage or duty ratio change, so that the LED lamp is dimmed; the programming function specifically means that the burner can be programmed by being connected with a programming interface of the LED driving power supply circuit. Therefore, the dimmer, the burner and the LED lamp are respectively connected with the LED driving power supply circuit through two core wires, and the LED driving power supply circuit is at least LED out of three two core wires. The cost of the LED driving power supply circuit is increased, the size and difficulty of the structural design are increased, the installation and use of users are directly affected, and the LED driving power supply circuit is not suitable for the development trend of miniaturization of power supplies and lamps.
Disclosure of Invention
The embodiment of the invention provides an LED driving power supply circuit, which aims to solve the technical problem that at least three two core wires are required to be LED out when the LED driving power supply circuit realizes a dimming function and a programmable function in the prior art.
The embodiment of the invention provides an LED driving power supply circuit which comprises a dimming unit, a control unit, a communication unit and a power supply unit, wherein the dimming unit is used for receiving a first dimming signal sent by a dimmer and performing filtering treatment; the control unit is connected with the dimming unit, and is used for outputting a second dimming signal to a power supply voltage according to the first dimming signal so as to perform dimming, and is used for communicating with the burner so as to output a corresponding feedback signal according to a burning signal sent by the burner; the communication unit is connected with the control unit and is used for feeding back a feedback signal output by the control unit to the burner; the power supply unit is connected with the control unit and is used for supplying power to the control unit; the light modulation unit, the control unit, the power supply unit and the communication unit are all connected to a multiplexing interface for connecting the light modulator or the burner.
Further, the power supply unit comprises a primary power supply and electronic unit, a secondary power supply and a tertiary power supply and electronic unit, wherein the primary power supply and electronic unit, the secondary power supply and the tertiary power supply and electronic unit are all connected with each other, and when the multiplexing interface is connected with the dimmer, the power supply voltage supplies power to the control unit through the primary power supply and electronic unit and the secondary power supply and electronic unit; when the multiplexing interface is connected with the burner, the burner supplies power to the control unit through the primary power supply electronic unit and the secondary power supply electronic unit; when the multiplexing interface is suspended, the power supply voltage supplies power to the control unit through the primary power supply electronic unit and the secondary power supply electronic unit, and the tertiary power supply electronic unit outputs a third dimming signal to the multiplexing interface.
Further, the primary power supply unit comprises a second triode, a second diode, a first zener diode, a sixth capacitor, a seventh capacitor and a twelfth resistor; the positive pole of the second diode is connected with the power supply voltage, the negative pole of the second diode is connected with the collector of the second triode, the base of the second triode is connected with the negative pole of the first zener diode, the positive pole of the first zener diode is grounded, the sixth capacitor and the seventh capacitor are connected in parallel between the negative pole of the second diode and the positive pole of the first zener diode, the twelfth resistor is connected between the collector and the base of the second diode, and the emitter of the second diode is used as the output end of the primary electronic supply unit to be connected to the input end of the secondary electronic supply unit and the input end of the tertiary electronic supply unit.
Further, the power supply unit further comprises a first diode, wherein the positive electrode of the first diode is connected to the multiplexing interface, and the negative electrode of the diode is connected to the primary power supply unit.
Further, the secondary electronic unit comprises a twenty-eighth resistor, a second voltage stabilizing element, a fifth triode, a fourteenth resistor, a seventeenth resistor and a fifth capacitor; the collector of the fifth triode is used as the input end of the secondary power supply unit to be connected with the output end of the primary power supply unit and the input end of the tertiary power supply unit, the base of the fifth triode is grounded through the second voltage stabilizing element, the twenty-eighth resistor is connected between the collector and the base of the fifth triode, the fourteenth resistor and the seventeenth resistor are connected in series and then are connected with the fifth capacitor in parallel, one end of the fifth capacitor is grounded, the other end of the fifth capacitor is connected to the emitter of the fifth triode, and the emitter of the fifth triode is used as the output end of the secondary power supply unit to be connected to the control unit so as to supply power to the control unit.
Further, the second voltage stabilizing element is a TL431 chip, a negative electrode of the second voltage stabilizing element is connected to a base electrode of the fifth triode, a positive electrode of the second voltage stabilizing element is grounded, and a reference electrode of the second voltage stabilizing diode is connected between the fourteenth resistor and the seventeenth resistor.
Further, the three-stage power supplying unit comprises a thirteenth resistor, a third voltage stabilizing element, a fourth diode, a twentieth resistor, a twenty-first resistor and a twenty-fourth resistor; one end of the thirteenth resistor is used as an input end of the three-stage electron supply unit and is connected with an output end of the one-stage electron supply unit and an input end of the two-stage electron supply unit, the other end of the thirteenth resistor is grounded through the third voltage stabilizing element, the positive electrode of the fourth diode is connected between the third voltage stabilizing element and the thirteenth resistor, the negative electrode of the fourth diode is grounded through the twentieth resistor and the twenty-fourth resistor, one end of the twenty-first resistor is connected between the negative electrode of the fourth diode and the twentieth resistor, and the other end of the twenty-first resistor is connected with the multiplexing interface.
Further, the third voltage stabilizing element is a TL431 chip, a negative electrode of the third voltage stabilizing element is connected to the thirteenth resistor, a positive electrode of the third voltage stabilizing element is grounded, and a reference stage of the third voltage stabilizing element is connected between the twentieth resistor and the twenty-fourth resistor.
Further, the dimming unit comprises a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor and a third capacitor; one end of the eighth resistor is connected with the multiplexing interface, and the other end of the eighth resistor is connected with the control unit through the seventh resistor; one end of the ninth resistor is connected between the seventh resistor and the eighth resistor after being connected with the third capacitor in parallel, and the other end of the ninth resistor is grounded; one end of the second capacitor is connected between the seventh resistor and the control unit, and the other end of the second capacitor is grounded.
Further, the communication unit comprises a third diode, a third triode, a fourth triode, a fifteenth resistor, an eighteenth resistor, a nineteenth resistor and a twenty second resistor; the positive pole of third diode is connected multiplexing interface, the negative pole of third diode is connected the collecting electrode of fourth triode, the projecting pole of fourth triode is grounded, be connected with between the base of fourth triode and the projecting pole twenty-second resistance, the base of fourth triode passes through nineteenth resistance is connected the collecting electrode of third triode, be connected with between the projecting pole of third triode and the base fifteenth resistance, the base of third triode passes through eighteenth resistance is connected the control unit.
Compared with the prior art, the invention has the beneficial effects that: the dimming unit, the control unit, the power supply unit and the communication unit are connected to the multiplexing interface for the connection of the dimmer or the burner, so that the dimmer and the burner can share one interface to realize the dimming function and the programming function, the interfaces and the connecting wires are saved, the cost is reduced, and the structural design is optimized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a block schematic diagram of an LED drive power circuit provided by an embodiment of the present invention;
fig. 2 shows a schematic circuit structure of an LED driving power circuit according to an embodiment of the present invention;
fig. 3 is a block schematic diagram of a power supply unit in an LED driving power supply circuit according to an embodiment of the present invention;
fig. 4 shows a schematic connection diagram of an LED driving power circuit according to an embodiment of the present invention in practical application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
Referring to fig. 1, an embodiment of the present invention provides an LED driving power circuit 100, which includes a dimming unit 110, a control unit 120, a power supply unit 140, and a communication unit 130, wherein the control unit 120 may be implemented by a control chip, and the control unit 120 is connected to the dimming unit 110, the power supply unit 140, and the communication unit 130. The dimming unit 110 is configured to receive a first dimming signal sent by the dimmer 200 and perform filtering processing; the control unit 120 is configured to output a second dimming signal to a supply voltage according to the first dimming signal to perform dimming, and the control unit 120 is further configured to communicate with the burner 300 to output a corresponding feedback signal according to a burning signal sent by the burner 300; the communication unit 130 is configured to feed back a feedback signal output by the control unit 120 to the burner 300; the power supply unit 140 is configured to supply power to the control unit 120; the dimming unit 110, the control unit 120, the power supply unit 140 and the communication unit 130 are all connected to a multiplexing interface for the dimmer 200 or the burner 300 to connect. Through the above design, the dimmer 200 and the burner 300 may be connected with the control unit 120 through a multiplexing interface, so that the dimmer 200 and the burner 300 may share one interface to realize a dimming function and a programming function, which saves interfaces and connecting wires, reduces cost, and optimizes structural design.
Referring to fig. 2 and 3, in an embodiment, for example, in this embodiment, the power supply unit 140 includes a primary power supply electronic unit 141, a secondary power supply electronic unit 142, and a tertiary power supply electronic unit 143, where the primary power supply electronic unit 141, the secondary power supply electronic unit 142, and the tertiary power supply electronic unit 143 are all connected to each other, the multiplexing interface corresponds to a dim+ pin in the circuit diagram shown in fig. 2, the power supply voltage is a power supply voltage provided by a power supply motherboard of the LED driving power supply, the power supply voltage corresponds to a DVCC pin in the circuit diagram shown in fig. 2, and when the multiplexing interface is connected to the dimmer 200, the power supply voltage DVCC supplies power to the control unit 120. Specifically, the power supply voltage DVCC supplies power to the control unit 120 by outputting a 15V dc voltage through the primary power supply unit 141 and outputting a 5V reference dc voltage through the secondary power supply unit 142. When the multiplexing interface is suspended, the power supply voltage DVCC supplies power to the control unit 120 through the primary power supply electronic unit 141 and the secondary power supply electronic unit 142, and the tertiary power supply electronic unit 143 outputs a third dimming signal to the multiplexing interface, specifically, the third dimming signal is 10V, so that the control unit 120 outputs a dimming signal with a 100% duty cycle to make the LED lamp the brightest. The existing LED driving power supply circuit needs to build a test environment when using a programming function, needs to be provided with an alternating current power supply, a power meter, an LED lamp load and the like, is used for simulating real use conditions to supply power to the LED driving power supply circuit, ensures that a dimming module inside the LED driving power supply circuit is normally powered to realize the programming function, and has high requirements on the working environment, complex operation and low working efficiency. The invention can realize the off-line programming without external power supply, specifically, when the power supply voltage is 0V, the burner 300 supplies power to the control unit 120, when the multiplexing interface is connected with the burner 300, the burner 300 inputs a burning signal, the burning signal is a serial pulse signal of 0 to 10V, and the burning signal input by the burner 300 enters the primary power supply unit 141 and the secondary power supply unit 142 through the first diode D1 to output a reference direct current voltage of 5V to supply power to the control unit 120.
In an embodiment, for example, in the present embodiment, the primary power supply unit 141 includes a second triode Q2, a second diode D2, a first zener diode ZD1, a sixth capacitor C6, a seventh capacitor C7, and a twelfth resistor R12; the positive pole of the second diode D2 is connected with the power supply voltage, the negative pole of the second diode D2 is connected with the collector of the second triode Q2, the base of the second triode Q2 is connected with the negative pole of the first zener diode ZD1, the positive pole of the first zener diode ZD1 is grounded, the sixth capacitor C6 and the seventh capacitor C7 are connected in parallel between the negative pole of the second diode D2 and the positive pole of the first zener diode ZD1, the twelfth resistor R12 is connected between the collector and the base of the second triode Q2, and the emitter of the second triode Q2 is used as the output end of the primary electronic supply unit 141 to be connected to the input end of the secondary electronic supply unit 142 and the input end of the tertiary electronic supply unit 143, specifically, the second triode Q2 is an NPN tube.
In an embodiment, for example, in this embodiment, the second stage power supply unit 142 includes a twenty-eighth resistor R28, a second voltage stabilizing element U2, a fifth triode Q5, a fourteenth resistor R14, a seventeenth resistor 417 and a fifth capacitor C5, a collector of the fifth triode Q5 is connected as an input end of the second stage power supply unit 142 to an output end of the first stage power supply unit 141 and an input end of the third stage power supply unit 143, a base of the fifth triode Q5 is grounded through the second voltage stabilizing element U2, a twenty-eighth resistor R28 is connected between a collector and a base of the fifth triode Q5, the fourteenth resistor R14 and the seventeenth resistor R17 are connected in parallel with the fifth capacitor C5 after being connected in series, one end of the fifth capacitor C5 is grounded, another end of the fifth triode Q5 is connected to an emitter of the fifth triode Q5, an output end of the fifth triode Q5 is connected as the second stage power supply unit 142 to the control unit 120, a base of the fifth triode Q5 is connected to the second voltage stabilizing element U2, the fifth triode Q5 is connected to the fifth triode Q2, and the fifth triode Q5 is connected to the fifth triode Q2, the fifth triode Q5 is a linear voltage stabilizing element, and the fifth triode Q2 is connected between the fifth triode Q2 and the fifth triode Q2.
In an embodiment, for example, in this embodiment, the three-stage power supply unit 143 includes a thirteenth resistor R13, a third voltage stabilizing element U3, a fourth diode D4, a twenty-first resistor R21, and a twenty-fourth resistor R24, one end of the thirteenth resistor R13 is connected as an input terminal of the three-stage power supply unit 143 to the output terminal 141 of the one-stage power supply unit and an input terminal of the second-stage power supply unit 142, the other end of the thirteenth resistor R13 is grounded via the third voltage stabilizing element U3, an anode of the fourth diode D4 is connected between the third voltage stabilizing element U3 and the thirteenth resistor R13, a cathode of the fourth diode D4 is grounded via the twenty-first resistor R20 and the twenty-fourth resistor R24, one end of the twenty-first resistor R21 is connected between a cathode of the fourth diode D4 and the twenty-fourth resistor R20, the other end of the twenty-first resistor R21 is connected to the output terminal 141 of the one-stage power supply unit, the other end of the thirteenth resistor TL 21 is connected to the other end of the other voltage stabilizing element U3, the anode of the fourth diode D4 is connected to the twenty-first voltage stabilizing element U3, and the other voltage stabilizing element U3 is connected to the twenty-fourth resistor R24, and the voltage stabilizing element can be linearly connected between the third voltage stabilizing element U3 and the thirteenth resistor R13.
In an embodiment, for example, in the present embodiment, the dimming unit 110 includes a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a second capacitor C2, and a third capacitor C3; one end of the eighth resistor R8 is connected to the multiplexing interface, the other end of the eighth resistor R8 is connected to the control unit 120 through the seventh resistor R7, one end of the ninth resistor R9 is connected in parallel with the third capacitor C3 and then is connected between the seventh resistor R7 and the eighth resistor R8, the other end of the eighth resistor R8 is grounded, one end of the second capacitor C2 is connected between the seventh resistor R7 and the control unit 120, and the other end of the second capacitor C2 is grounded.
In an embodiment, for example, in the present embodiment, the communication unit 130 includes a third diode D3, a third triode Q3, a fourth triode Q4, a fifteenth resistor R15, an eighteenth resistor R18, a nineteenth resistor R19, and a twenty-second resistor R22; the positive pole of third diode D3 is connected multiplexing interface, the negative pole of third diode D3 is connected the collecting electrode of fourth triode Q4, the projecting pole ground connection of fourth triode Q4, be connected with between the base of fourth triode Q4 and the projecting pole twenty-second resistance R22, the base of fourth triode Q4 is through nineteenth resistance R19 connects the collecting electrode of third triode Q3, be connected with between the projecting pole of third triode Q3 and the base fifteenth resistance R15, the base of third triode Q3 is passed through eighteenth resistance R18 is connected the TX pin of control unit 120, specifically, third triode Q3 is the PNP pipe, fourth triode Q4 is the NPN pipe.
The working principle of the invention in each state is specifically described as follows:
during dimming, the multiplexing interface is connected to the dimmer 200, the dimmer 200 inputs the first dimming signal to the dimming unit 110, the first dimming signal is an analog signal of 0 to 10V, the dimming unit 110 receives the first dimming signal, performs filtering processing on the first dimming signal, and outputs the filtered first dimming signal to the control unit 120, and the control unit 120 outputs a second dimming signal with a stable duty ratio to the power supply voltage through a program algorithm to perform dimming. For example, when the first dimming signal is 1V, the control unit 120 outputs a second dimming signal with a duty ratio of 10% and an amplitude of 5V to reduce the brightness of the LED lamp through analog-to-digital variation of the first dimming signal; when the first dimming signal is 10V, the control unit 120 outputs a second dimming signal with a duty ratio of 100% and an amplitude of 5V to increase the brightness of the LED lamp through analog-to-digital variation of the first dimming signal; the second dimming signal is a PWM signal. In the dimming process, the power supply voltage DVCC supplies power to the control unit, specifically, the power supply voltage outputs a 15V dc voltage through the primary power supply electronic unit 141, and outputs a 5V dc voltage through the secondary power supply electronic unit 142 to supply power to the control unit 120.
During programming, the multiplexing interface is connected to the burner 300, the burner 300 inputs a burning signal to the control unit 120, the burning signal is a serial pulse signal of 0 to 10V, the burning signal is divided by the third resistor R3 and the fifth resistor R5 and then is input to an RX pin of the control unit 120, a TX pin of the control unit 120 outputs a feedback signal to the communication unit 130, and the feedback signal returns to the burner 300 through the communication unit 130. For example, when the TX pin of the control unit is 0V, the third triode is turned on Q3, the potential of the emitter of the third triode Q3 is at a high level of 5V provided by the reference voltage, the fourth triode Q4 is turned on after being divided by the nineteenth resistor R19 and the twenty second resistor R22, and the voltage of the fourth triode Q4 for turning on the reset interface is pulled down, so as to output a low-level feedback signal to the burner 300; when the TX pin of the control unit is 5V, the third transistor Q3 is turned off, so that the fourth transistor Q4 is also turned off, and the third electronic unit 143 outputs the feedback signal of high level to the burner 300 through the twenty-first resistor R21. In summary, the control unit 120 communicates with the burner 300 by receiving the burning signal via the RX pin and outputting the feedback signal via the TX pin. In the programming process, the control unit 120 may complete programming when no external power is supplied, and in particular, when the power supply voltage is 0V, the burner 300 supplies power to the control unit 120, when the multiplexing interface is connected to the burner 300, the burner 300 inputs a burning signal, the burning signal is a serial pulse signal of 0 to 10V, and the burning signal input by the burner 300 enters into the primary power supply unit 141 and the secondary power supply unit 142 through a first diode to output a reference dc voltage of 5V to supply power to the control unit 120.
When the multiplexing interface is suspended, the control unit 120 is powered by the power supply voltage DVCC through the primary power supply electronic unit 141 and the secondary power supply electronic unit 142, and at this time, the tertiary power supply electronic unit 143 outputs a third dimming signal to the multiplexing interface, specifically, the third dimming signal is 10V, and the control unit 120 detects that the potential of the multiplexing interface is 10V, so that the control unit 120 outputs a dimming signal with a duty ratio of 100% to dim the LED lamp to the most light.
Referring to fig. 4, a connection schematic diagram of an LED driving power circuit in practical application of the embodiment of the present invention is shown, including an LED driving power circuit 100, a dimmer 200, a burner 300 and an LED lamp 400, where the LED driving power circuit 100 is the LED driving power circuit 100 in the above embodiment, an input end of the LED driving power circuit 100 is connected to an ac power supply, an output end of the LED driving power circuit 100 is connected to the LED lamp 400, and the dimmer 200 and the burner 300 are connected to the LED driving power circuit 100 through a multiplexing interface, so that the dimmer 200 and the burner 300 can share one interface to realize a dimming function and a programming function through the above design, so that interfaces and connecting wires are saved, cost is reduced, and structural design is optimized.
According to the LED driving power supply circuit, the dimming unit, the control unit, the power supply unit and the communication unit are connected to the multiplexing interface for the connection of the dimmer or the burner, so that the dimmer and the burner can share one interface to realize a dimming function and a programming function, the interfaces and connecting wires are saved, the cost is reduced, and the structural design is optimized.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (4)
1. An LED driving power supply circuit, comprising:
the dimming unit is used for receiving the first dimming signal sent by the dimmer and performing filtering processing;
the control unit is connected with the dimming unit, and is used for outputting a second dimming signal to a power supply voltage according to the first dimming signal so as to perform dimming, and is used for communicating with the burner so as to output a corresponding feedback signal according to the burning signal sent by the burner;
the communication unit is connected with the control unit and is used for feeding back a feedback signal output by the control unit to the burner; and
the power supply unit is connected with the control unit and is used for supplying power to the control unit;
the light modulation unit, the control unit, the power supply unit and the communication unit are all connected to a multiplexing interface for the light modulator or the burner to be connected, and the light modulator and the burner share the multiplexing interface;
the power supply unit comprises a primary power supply and electronics unit, a secondary power supply and electronics unit and a tertiary power supply and electronics unit, wherein the primary power supply and electronics unit, the secondary power supply and electronics unit are all connected with each other, and when the multiplexing interface is connected with the dimmer, the power supply voltage supplies power to the control unit through the primary power supply and electronics unit and the secondary power supply and electronics unit;
when the multiplexing interface is connected with the burner, the burner supplies power to the control unit through the primary power supply electronic unit and the secondary power supply electronic unit;
when the multiplexing interface is suspended, the power supply voltage supplies power to the control unit through the primary power supply electronic unit and the secondary power supply electronic unit, and the tertiary power supply electronic unit outputs a third dimming signal to the multiplexing interface;
the primary electron supply unit comprises a second triode, a second diode, a first zener diode, a sixth capacitor, a seventh capacitor and a twelfth resistor; the anode of the second diode is connected with the power supply voltage, the cathode of the second diode is connected with the collector of the second triode, the base of the second triode is connected with the cathode of the first zener diode, the anode of the first zener diode is grounded, the sixth capacitor and the seventh capacitor are connected in parallel between the cathode of the second diode and the anode of the first zener diode, the twelfth resistor is connected between the collector and the base of the second diode, and the emitter of the second diode is used as the output end of the primary power supply unit to be connected to the input end of the secondary power supply unit and the input end of the tertiary power supply unit;
the secondary power supply unit comprises a twenty-eighth resistor, a second voltage stabilizing element, a fifth triode, a fourteenth resistor, a seventeenth resistor and a fifth capacitor; the collector electrode of the fifth triode is used as the input end of the secondary power supply unit to be connected with the output end of the primary power supply unit and the input end of the tertiary power supply unit, the base electrode of the fifth triode is grounded through the second voltage stabilizing element, the twenty-eighth resistor is connected between the collector electrode and the base electrode of the fifth triode, the fourteenth resistor and the seventeenth resistor are connected in series and then are connected with the fifth capacitor in parallel, one end of the fifth capacitor is grounded, the other end of the fifth capacitor is connected with the emitter electrode of the fifth triode, and the emitter electrode of the fifth triode is used as the output end of the secondary power supply unit to be connected with the control unit so as to supply power to the control unit;
the three-stage power supply unit comprises a thirteenth resistor, a third voltage stabilizing element, a fourth diode, a twentieth resistor, a twenty-first resistor and a twenty-fourth resistor; one end of the thirteenth resistor is used as an input end of the three-stage electron supply unit and is connected with an output end of the one-stage electron supply unit and an input end of the two-stage electron supply unit, the other end of the thirteenth resistor is grounded through the third voltage stabilizing element, the positive electrode of the fourth diode is connected between the third voltage stabilizing element and the thirteenth resistor, the negative electrode of the fourth diode is grounded through the twentieth resistor and the twenty-fourth resistor, one end of the twenty-first resistor is connected between the negative electrode of the fourth diode and the twentieth resistor, and the other end of the twenty-first resistor is connected with the multiplexing interface;
the dimming unit comprises a seventh resistor, an eighth resistor, a ninth resistor, a second capacitor and a third capacitor; one end of the eighth resistor is connected with the multiplexing interface, and the other end of the eighth resistor is connected with the control unit through the seventh resistor; one end of the ninth resistor is connected between the seventh resistor and the eighth resistor after being connected with the third capacitor in parallel, and the other end of the ninth resistor is grounded; one end of the second capacitor is connected between the seventh resistor and the control unit, and the other end of the second capacitor is grounded;
the communication unit comprises a third diode, a third triode, a fourth triode, a fifteenth resistor, an eighteenth resistor, a nineteenth resistor and a twenty-second resistor; the positive pole of third diode is connected multiplexing interface, the negative pole of third diode is connected the collecting electrode of fourth triode, the projecting pole of fourth triode is grounded, be connected with between the base of fourth triode and the projecting pole twenty-second resistance, the base of fourth triode passes through nineteenth resistance is connected the collecting electrode of third triode, be connected with between the projecting pole of third triode and the base fifteenth resistance, the base of third triode passes through eighteenth resistance is connected the control unit.
2. The LED driving power supply circuit of claim 1, wherein the power supply unit further comprises a first diode, a positive electrode of the first diode being connected to the multiplexing interface, a negative electrode of the diode being connected to the primary power supply unit.
3. The LED driving power supply circuit according to claim 1, wherein the second voltage stabilizing element is a TL431 chip, a negative electrode of the second voltage stabilizing element is connected to a base electrode of the fifth transistor, a positive electrode of the second voltage stabilizing element is grounded, and a reference electrode of the second voltage stabilizing element is connected between the fourteenth resistor and the seventeenth resistor.
4. The LED driving power supply circuit of claim 1, wherein the third voltage stabilizing element is a TL431 chip, a negative electrode of the third voltage stabilizing element is connected to the thirteenth resistor, a positive electrode of the third voltage stabilizing element is grounded, and a reference stage of the third voltage stabilizing element is connected between the twentieth resistor and the twenty-fourth resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810286053.2A CN108322964B (en) | 2018-04-03 | 2018-04-03 | LED driving power circuit |
Applications Claiming Priority (1)
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| CN110769559A (en) * | 2019-12-02 | 2020-02-07 | 深圳瓦特智汇科技有限公司 | Multi-interface compatible multiplexing communication, dimming and programming system |
| TWI734578B (en) * | 2020-08-07 | 2021-07-21 | 全漢企業股份有限公司 | Illumination power circuit with diming function and associated control method thereof |
| WO2024041575A1 (en) * | 2022-08-23 | 2024-02-29 | 深圳利亚德光电有限公司 | Signal transmission method and apparatus, led control apparatus and led display module |
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