CN219459347U

CN219459347U - Non-isolated LED lamp circuit with dimming of 0-10V

Info

Publication number: CN219459347U
Application number: CN202223272811.6U
Authority: CN
Inventors: 沈海华
Original assignee: Harmony Mingxin Yiwu Photoelectric Technology Co ltd
Current assignee: Harmony Mingxin Yiwu Photoelectric Technology Co ltd
Priority date: 2022-12-06
Filing date: 2022-12-06
Publication date: 2023-08-01
Anticipated expiration: 2032-12-06

Abstract

The utility model discloses a 0-10V dimming non-isolated LED lamp circuit, which comprises a dimming power supply circuit and an LED light-emitting circuit, wherein the dimming power supply circuit comprises a rectifying circuit, a boosting constant voltage circuit, a dimming constant current circuit and a voltage sampling circuit; the light-emitting diode has the advantages that a two-stage conversion mode is adopted, low harmonic input and low ripple output are achieved, the light frequency flash during light emission can be reduced, and the light-emitting diode has high conversion efficiency.

Description

Non-isolated LED lamp circuit with dimming of 0-10V

Technical Field

The utility model relates to a 0-10V dimming LED lamp circuit, in particular to a 0-10V dimming non-isolation LED lamp circuit.

Background

The 0-10V dimmed LED lamp typically has a hot input terminal and a neutral input terminal for receiving a mains voltage, and a positive signal terminal and a negative signal terminal for receiving a voltage signal (i.e. a dimming signal) output by the 0-10V dimmer. When the positive signal end and the negative signal end of the 0-10V dimming LED lamp are connected with the 0-10V dimmer, when the 0-10V dimmer outputs a voltage signal representing the lighting of the lamp, the luminous intensity of the 0-10V dimming LED lamp corresponds to the magnitude of the voltage signal output by the 0-10V dimmer, the larger the voltage signal output by the 0-10V dimmer is, the stronger the luminous brightness of the 0-10V dimming LED lamp is, and otherwise, the smaller the voltage signal output by the 0-10V dimmer is, the smaller the luminous brightness of the 0-10V dimming LED lamp is. When the 0-10V dimmer outputs a voltage signal representing the extinction, the 0-10V dimming LED lamp circuit does not emit light.

The traditional 0-10V dimming LED lamp circuit generally comprises a dimming power supply circuit and an LED light-emitting circuit, wherein the dimming power supply circuit is connected with the LED light-emitting circuit, and the dimming power supply circuit is used for converting the accessed mains voltage into direct current in an isolated conversion mode to drive the LED light-emitting circuit to emit light. The direct current output by the dimming power supply circuit corresponds to the dimming signal accessed by the LED lamp circuit with dimming of 0-10V.

The traditional 0-10V dimming LED lamp circuit has low conversion efficiency and larger ripple of output current because of adopting a single-stage isolation conversion mode, so that the traditional 0-10V dimming LED lamp has larger light stroboscopic effect when emitting light.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a 0-10V dimming non-isolated LED lamp circuit, wherein the 0-10V dimming non-isolated LED lamp circuit adopts a two-stage conversion mode to achieve low harmonic input and low ripple output, can reduce optical frequency flash during light emission, and has higher conversion efficiency.

The technical scheme adopted for solving the technical problems is as follows: the 0-10V dimming non-isolated LED lamp circuit comprises a fire wire input end and a zero wire input end which are used for being connected with a mains voltage, and a positive signal end and a negative signal end which are used for being connected with a voltage signal output by a 0-10V dimmer, wherein the 0-10V dimming non-isolated LED lamp circuit comprises a dimming power supply circuit and an LED light-emitting circuit, the LED light-emitting circuit is provided with a positive electrode and a negative electrode, the dimming power supply circuit comprises a rectifying circuit, a boosting constant voltage circuit, a dimming constant current circuit and a voltage sampling circuit, the rectifying circuit is provided with a fire wire input end, a zero wire input end, a positive output end and a negative output end, the boosting constant voltage circuit is provided with an input end, an output end and a negative electrode, the dimming constant current circuit adopts a non-isolated voltage reduction conversion mode and is provided with a positive electrode, a negative electrode, an output end, a detection end and a detection end negative electrode, the voltage sampling circuit is provided with a positive input end, a negative input end, a positive output end and a negative output end, the positive electrode of the LED light-emitting circuit, the positive electrode of the light-adjusting constant-current circuit and the output end of the voltage boosting constant-voltage circuit are connected, the negative electrode of the LED light-emitting circuit is connected with the output end of the light-adjusting constant-current circuit, the positive electrode of the detection end of the light-adjusting constant-current circuit is connected with the positive output end of the voltage sampling circuit, the negative electrode of the light-adjusting constant-current circuit is connected with the negative output end of the voltage sampling circuit, the negative electrode of the light-adjusting constant-current circuit, the negative electrode of the voltage boosting constant-current circuit is connected with the negative output end of the rectifying circuit, the live wire input end of the rectifying circuit is connected with the live wire input end of the 0-10V light-adjusting non-isolation LED lamp circuit, the zero line input end of the rectifying circuit is connected with the zero line input end of the 0-10V dimming non-isolated LED lamp circuit, the positive input end of the voltage sampling circuit is connected with the positive signal end of the 0-10V dimming non-isolated LED lamp circuit, and the negative input end of the voltage sampling circuit is connected with the negative signal end of the 0-10V dimming non-isolated LED lamp circuit.

The voltage boosting constant voltage circuit is further provided with an enabling end, the dimming constant current circuit is further provided with a state signal end, the enabling end of the voltage boosting constant voltage circuit is connected with the state signal end of the dimming constant current circuit, the enabling end of the voltage boosting constant voltage circuit is used for being connected with a voltage signal entering a working state or carrying out a dormant state, and the state signal end of the dimming constant current circuit is used for outputting the voltage signal entering the working state or carrying out the dormant state. In the non-isolated LED lamp circuit with the dimming of 0-10V, when the output current of the output end of the dimming constant current circuit is not zero, the state signal end can output a voltage signal entering the working state, when the output current of the output end of the dimming constant current circuit is zero, the state signal end can output a voltage signal entering the dormant state, when the enabling end of the voltage boosting constant voltage circuit is connected with the voltage signal entering the working state, the voltage boosting constant voltage circuit is in the working state to perform normal working, when the enabling end of the voltage boosting constant voltage circuit is connected with the voltage signal in the dormant state, the voltage boosting constant voltage circuit is in the dormant state to stop working, and the electric energy consumed by the voltage boosting constant voltage circuit in the dormant state is the lowest; therefore, when the LED light-emitting circuit does not emit light, the voltage boosting constant-voltage circuit is in a non-working state, so that the circuit power consumption of the 0-10V dimming non-isolated LED lamp circuit when the LED light-emitting circuit does not emit light is further reduced.

The dimming constant current circuit comprises a first integrated circuit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first NMOS tube and a first inductor, wherein the fifth capacitor is an electrolytic capacitor, the first diode is a zener diode, the second diode, the third diode and the fourth diode are rectifier diodes, the first inductor comprises two coils which are respectively called a first coil and a second coil, one end of the first resistor is connected with one end of the second resistor, the connection end is the state signal end of the dimming constant current circuit, the other end of the first resistor is connected with the positive electrode of the first diode, the negative electrode of the second diode, the positive electrode of the third diode is connected with one end of the first capacitor, the positive electrode of the second diode is connected with one end of the fifth resistor, the other end of the fifth resistor, one end of the third resistor is connected with one end of the second coil, the other end of the third resistor, one end of the fourth resistor is connected with the 2 nd pin of the first integrated circuit, one end of the second capacitor, one end of the sixth resistor is connected with the 1 st pin of the first integrated circuit, the other end of the sixth resistor is connected with one end of the third capacitor, one end of the fourth capacitor is connected with the 5 th pin of the first integrated circuit, the connecting end of the fourth capacitor is the positive electrode of the detecting end of the dimming constant current circuit, the 6 th pin of the first integrated circuit is the negative electrode of the detecting end of the dimming constant current circuit, the negative electrode of the third diode, one end of the seventh resistor and the 8 th pin of the first integrated circuit are connected, the grid electrode of the first NMOS tube is connected with the 4 th pin of the first integrated circuit, the source electrode of the first NMOS tube, one end of the eighth resistor is connected with one end of the ninth resistor, the other end of the eighth resistor is connected with the 3 rd pin of the first integrated circuit, the drain electrode of the first NMOS tube, the positive electrode of the fourth diode is connected with one end of the first coil, the negative electrode of the fifth capacitor is connected with one end of the tenth resistor, the connecting end of the grid electrode of the first NMOS tube is connected with one end of the fourth resistor, the other end of the fourth resistor is connected with the other end of the fourth resistor, the other end of the fourth resistor is connected with the fourth end of the fourth resistor, the fourth resistor is connected with the other end of the fourth resistor, and the fourth resistor is connected with the other end of the fourth resistor. The dimming constant current circuit uses the direct current voltage output by the output end of the boosting constant voltage circuit as constant voltage to convert the first integrated circuit with the model SY5983 from the conventional isolation conversion application to the buck constant current conversion application, and the direct current voltage output by the output end of the boosting constant voltage circuit is kept unchanged regardless of fluctuation of the mains voltage, so that the current output by the output end of the dimming constant current circuit which is regulated into the buck constant current conversion is kept constant, and the dimming constant current circuit has a good linear regulation rate.

The voltage sampling circuit comprises an eleventh resistor, a fifth diode, a sixth capacitor, a seventh capacitor and a high-frequency transformer, wherein the sixth capacitor is an electrolytic capacitor, the high-frequency transformer comprises a primary coil and a secondary coil, one end of the eleventh resistor is a positive output end of the voltage sampling circuit, the other end of the eleventh resistor is connected with the positive electrode of the fifth diode, the negative electrode of the fifth diode is connected with one end of the primary coil of the high-frequency transformer, the other end of the primary coil of the high-frequency transformer is a negative output end of the voltage sampling circuit, one end of the secondary coil of the high-frequency transformer is connected with the positive electrode of the sixth diode, the negative electrode of the sixth capacitor is connected with one end of the seventh capacitor, the connecting end of the negative electrode of the sixth capacitor is a positive input end of the voltage sampling circuit, and the other end of the high-frequency transformer is connected with the negative end of the seventh capacitor.

The boost constant voltage circuit comprises a second integrated circuit with the model of MT9750, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a seventh diode, an eighth diode, a ninth diode, a second NMOS tube and a second inductor, wherein the seventh diode, the eighth diode and the ninth diode are rectifier diodes, the fourteenth capacitor is an electrolytic capacitor, the second inductor is provided with two coils which are respectively called a third coil and a fourth coil, one end of the eighth capacitor, one end of the thirteenth resistor and one end of the third coil are connected, the connection end of the voltage boosting constant voltage circuit is the positive electrode of the voltage boosting constant voltage circuit, the other end of the thirteenth resistor, the negative electrode of the ninth diode, one end of the tenth capacitor and the 8 th pin of the second integrated circuit are connected, one end of the nineteenth resistor is connected with the 5 th pin of the second integrated circuit, the positive electrode of the ninth diode, the negative electrode of the eighth diode and one end of the twelfth resistor are connected, the other end of the twelfth resistor is connected with one end of the ninth capacitor, the other end of the nineteenth resistor and one end of the fourth coil are connected, the 2 nd pin of the second integrated circuit, one end of the eleventh capacitor and one end of the fourteenth resistor are connected, the other end of the fourteenth resistor is connected with one end of the twelfth capacitor, the first pin 7 of the second integrated circuit is connected to the gate of the second NMOS, the second pin 4 of the second integrated circuit, the source of the second NMOS and one end of the fifteenth resistor are connected, the 3 rd pin of the second integrated circuit is the enabling end of the boost constant voltage circuit, the 1 st pin of the second integrated circuit, one end of the thirteenth capacitor, one end of the seventeenth resistor and one end of the eighteenth resistor are connected, the other end of the seventeenth resistor and one end of the sixteenth resistor are connected, the negative electrode of the sixteenth resistor, the negative electrode of the seventh diode and the positive electrode of the fourteenth capacitor are connected, the connection end is the output end of the boost constant voltage circuit, the positive electrode of the seventh diode, the other end of the third coil and the drain electrode of the second NMOS are connected, the other end of the fifteenth resistor, the other end of the eighteenth resistor, the capacitance of the eighth coil, the other end of the eighth capacitor, the other end of the thirteenth capacitor, the other end of the eighth capacitor, the other end of the eighth capacitor, and the other end of the eighth capacitor are connected. In the boost constant voltage circuit, the second integrated circuit with the model MT9570 is provided with an enabling end, and the enabling end is associated with the current output by the output end of the dimming constant current circuit, so that the second integrated circuit enters a working state when the current output by the output end of the dimming constant current circuit is not zero, enters a dormant state when the current output by the output end of the dimming constant current circuit is zero, and reduces the power consumption on the basis of not increasing extra cost, thereby realizing low cost and energy saving.

Compared with the prior art, the utility model has the advantages that the dimming power supply circuit is formed by the rectifying circuit, the boosting constant voltage circuit, the dimming constant current circuit and the voltage sampling circuit, the rectifying circuit is used for converting the alternating current voltage connected with the live wire input end and the zero wire input end of the rectifying circuit into the pulsating direct current voltage, and the boosting constant voltage circuit is used for converting the pulsating direct current voltage connected with the input end of the rectifying circuit into the direct current voltage with constant magnitude and outputting the direct current voltage at the output end of the rectifying circuit; the dimming constant current circuit is used for setting the current output by the output end according to an external dimming signal, the positive electrode of the detection end and the negative electrode of the dimming constant current circuit are used for detecting the direct current voltage of the externally connected dimming signal, the output end of the dimming constant current circuit is used for outputting constant current according to the direct current voltage detected by the positive electrode of the detection end and the negative electrode of the detection end to drive the LED light emitting circuit to emit light, the luminous intensity of the LED light emitting circuit is in direct proportion to the current connected between the positive electrode and the negative electrode of the LED light emitting circuit, the live wire input end and the zero wire input end of the non-isolated LED light fixture circuit for 0-10V dimming are connected with the live wire and the zero wire of the commercial power, when the positive signal end and the negative signal end are connected with the 0-10V dimmer, the commercial power voltage is connected between the live wire input end and the zero wire input end of the rectifying circuit, the positive input end and the negative input end of the voltage sampling circuit are connected with voltage signals output by a 0-10V light modulator, a pulsating voltage is output between the positive output end and the negative output end of the rectifying circuit, the boosting constant voltage circuit converts the pulsating voltage into direct current voltage with constant magnitude and outputs the direct current voltage between the output end and the negative electrode of the rectifying circuit, the light modulating constant current circuit detects the voltage signals output by an external 0-10V light modulator through the voltage sampling circuit after adding voltage between the positive electrode and the negative electrode of the light modulating constant current circuit, when the light modulating constant current circuit detects that the voltage signals output by the external 0-10V light modulator are voltage signals representing a lighting lamp through the voltage sampling circuit, the magnitude of current output by the output end of the light modulating constant current circuit corresponds to the magnitude of the voltage signals output by the 0-10V light modulator, the larger the voltage signals output by the 0-10V light modulator are, the light emitting brightness of the LED light emitting circuit is stronger, and the voltage signals output by the 0-10V light modulator are smaller are the opposite, the smaller the luminous brightness of the LED luminous circuit is, when the dimming constant current circuit detects that the voltage signal output by the external 0-10V dimmer is a turn-off voltage signal through the voltage sampling circuit, the current output by the output end of the dimming constant current circuit is zero, and the LED luminous circuit does not emit light, so that the utility model adopts a two-stage conversion mode of the boosting constant voltage circuit and the non-isolated dimming constant current circuit to realize low harmonic wave of input current and low ripple wave of output current, thereby being capable of reducing the light frequency flash when the LED luminous circuit emits light and having higher conversion efficiency.

Drawings

FIG. 1 is a schematic block diagram of a 0-10V dimmed non-isolated LED lamp circuit of the present utility model;

FIG. 2 is a circuit diagram of a dimming constant current circuit and a voltage sampling circuit of the 0-10V dimming non-isolated LED lamp circuit of the utility model;

fig. 3 is a circuit diagram of a rectifying circuit and a boosting constant voltage circuit of the 0-10V dimming non-isolated LED lamp circuit of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

Embodiment one: as shown in fig. 1, the non-isolated LED lamp circuit with 0-10V dimming comprises a dimming power supply circuit and an LED light emitting circuit, wherein the LED light emitting circuit is provided with a positive pole and a negative pole, the light emitting intensity of the LED light emitting circuit is in direct proportion to the current connected between the positive pole and the negative pole, the dimming power supply circuit comprises a rectifying circuit, a boosting constant voltage circuit, a dimming constant current circuit and a voltage sampling circuit, the rectifying circuit is provided with a live wire input end, a zero wire input end, a positive output end and a negative output end, the rectifying circuit is used for converting the alternating current connected with the live wire input end and the zero wire input end into a pulsating direct current, the boosting constant voltage circuit is provided with an input end, an output end and a negative pole, and the boosting constant voltage circuit is used for converting the pulsating direct current connected with the input end into a constant direct current voltage and outputting the constant direct current; the dimming constant current circuit adopts a non-isolated buck conversion mode and is provided with an anode, a cathode, an output end, a detection end anode and a detection end cathode, wherein the dimming constant current circuit is used for setting the current output by the output end according to an external dimming signal, the detection end anode and the detection end cathode of the dimming constant current circuit are used for detecting the direct current voltage of the externally connected dimming signal, and the output end of the dimming constant current circuit is used for outputting constant current; the voltage sampling circuit is provided with a positive input end, a negative input end, a positive output end and a negative output end, the positive electrode of the LED light-emitting circuit, the positive electrode of the dimming constant-current circuit and the output end of the boosting constant-voltage circuit are connected, the negative electrode of the LED light-emitting circuit is connected with the output end of the dimming constant-current circuit, the positive electrode of the detection end of the dimming constant-current circuit is connected with the positive output end of the voltage sampling circuit, the negative electrode of the dimming constant-current circuit, the negative electrode of the boosting constant-voltage circuit and the negative output end of the rectifying circuit are connected, the live wire input end of the rectifying circuit is connected with the live wire input end of the 0-10V dimming non-isolation LED lamp circuit, the zero wire input end of the rectifying circuit is connected with the zero wire input end of the 0-10V dimming non-isolation LED lamp circuit, the positive input end of the voltage sampling circuit is connected with the positive signal end of the 0-10V dimming non-isolation LED lamp circuit, and the negative input end of the voltage sampling circuit is connected with the negative signal end of the 0-10V dimming non-isolation LED lamp circuit. The boost constant voltage circuit is further provided with an enabling end, the dimming constant current circuit is further provided with a state signal end, the enabling end of the boost constant voltage circuit is connected with the state signal end of the dimming constant current circuit, the enabling end of the boost constant voltage circuit is used for being connected with a voltage signal entering a working state or carrying out a dormant state, and the state signal end of the dimming constant current circuit is used for outputting the voltage signal entering the working state or carrying out the dormant state.

In this embodiment, when the live wire input end and the zero wire input end of the non-isolated LED lamp circuit with dimming of 0-10V are connected to the live wire and the zero wire of the mains supply, and the positive signal end and the negative signal end are connected to the 0-10V dimmer, the mains supply voltage is connected between the live wire input end and the zero wire input end of the rectifying circuit, the positive input end and the negative input end of the voltage sampling circuit are connected to the voltage signal output by the 0-10V dimmer, a pulsating voltage is output between the positive output end and the negative output end of the rectifying circuit, the pulsating voltage is converted into a direct current voltage with a constant magnitude and is output between the output end and the negative electrode of the rectifying circuit, after a voltage is added between the positive electrode and the negative electrode of the rectifying circuit, the voltage signal is detected by the voltage sampling circuit, and the voltage signal output by the external 0-10V dimmer is detected by the voltage sampling circuit, when the dimming constant current circuit detects that the voltage signal output by the external 0-10V dimmer is the voltage signal representing the bright lamp, the magnitude of the current output by the voltage sampling circuit corresponds to the magnitude of the voltage signal output by the 0-10V dimmer, the voltage signal output by the voltage sampling circuit is the light-emitting circuit when the voltage signal output by the light-emitting circuit is greater than the light-emitting from the light-emitting circuit by the light-emitting from the light-emitting circuit to the light-emitting from the light-emitting device to the light-emitting device. When the current output by the output end of the dimming constant current circuit is not zero, the state signal end outputs a voltage signal entering the working state, when the current output by the output end of the dimming constant current circuit is zero, the state signal end outputs a voltage signal entering the dormant state, when the enabling end of the boosting constant voltage circuit is connected with the voltage signal entering the working state, the boosting constant voltage circuit is in the working state and works normally, when the enabling end of the boosting constant voltage circuit is connected with the voltage signal entering the dormant state, the boosting constant voltage circuit is in the dormant state and stops working, and the electric energy consumed by the boosting constant voltage circuit in the dormant state is the lowest; when the LED light-emitting circuit does not emit light, the step-up constant voltage circuit is in a non-working state, so that the circuit power consumption of the non-isolated LED lamp circuit with 0-10V dimming when the LED light-emitting circuit does not emit light is further reduced.

Embodiment two: this embodiment is substantially the same as embodiment one, except that: as shown in fig. 2, in the present embodiment, the dimming constant current circuit includes a first integrated circuit U1, 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 seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first NMOS transistor Q1, and a first inductor, the fifth capacitor C5 is an electrolytic capacitor, the first diode D1 is a zener diode, the second diode D2, the third diode D3, and the fourth diode D4 are rectifier diodes, the first inductor includes two coils, which are respectively referred to as a first coil L1-N1 and a second coil L1-N2, one end of the first resistor R1 is connected with one end of the second resistor R2, the connecting end is a state signal end of a dimming constant current circuit, the other end of the first resistor R1 is connected with the positive electrode of the first diode D1, the negative electrode of the second diode D2, the positive electrode of the third diode D3 is connected with one end of the first capacitor C1, the positive electrode of the second diode D2 is connected with one end of the fifth resistor R5, the other end of the fifth resistor R5, one end of the third resistor R3 is connected with one end of the second coil L1-N2, the other end of the third resistor R3, one end of the fourth resistor R4 is connected with the 2 nd pin of the first integrated circuit U1, one end of the second capacitor C2, one end of the sixth resistor R6 is connected with the 1 st pin of the first integrated circuit U1, the other end of the sixth resistor R6 is connected with one end of the third capacitor C3, one end of the fourth capacitor C4 is connected with the 5 th pin of the first integrated circuit U1, the connection end of the first integrated circuit U1 is the positive electrode of the detection end of the dimming constant current circuit, the 6 th pin of the first integrated circuit U1 is the negative electrode of the detection end of the dimming constant current circuit, the negative electrode of the third diode D3, one end of the seventh resistor R7 is connected with the 8 th pin of the first integrated circuit U1, the grid electrode of the first NMOS tube Q1 is connected with the 4 th pin of the first integrated circuit U1, the source electrode of the first NMOS tube Q1, one end of the eighth resistor R8 and one end of the ninth resistor R9 are connected, the other end of the eighth resistor R8 is connected with the 3 rd pin of the first integrated circuit U1, the drain electrode of the first NMOS tube Q1, the positive electrode of the fourth diode D4 and one end of the first coil L1-N1 are connected, the other end of the first coil L1-N1, the negative electrode of the fifth capacitor C5 and one end of the tenth resistor R10 are connected, the connection end of the output end of the dimming constant current circuit, the other end of the seventh resistor R7, the other end of the tenth resistor R10, the negative electrode of the fourth diode D4 and the other end of the fifth capacitor C5 are connected with the other end of the fourth resistor C1-N1, the other end of the fourth resistor C2 is connected with the other end of the fourth resistor C2, the other end of the fourth resistor C2 is connected with the other end of the fourth resistor C1, the fourth resistor C2 is connected with the other end of the fourth resistor C2 is connected with the fourth resistor.

The dimming constant current circuit of the embodiment uses the direct current voltage output by the output end of the boost constant voltage circuit as constant voltage to convert the first integrated circuit U1 with the model SY5983 from the conventional isolation conversion application to the buck constant current conversion application, and the direct current voltage output by the output end of the boost constant voltage circuit is kept unchanged regardless of fluctuation of the mains voltage, so that the current output by the output end of the dimming constant current circuit which is regulated to the buck constant current conversion is kept constant, thereby having better linear regulation rate.

Embodiment III: this embodiment is basically the same as the second embodiment, except that: as shown in fig. 2, in the present embodiment, the voltage sampling circuit includes an eleventh resistor R11, a fifth diode D5, a sixth diode D6, a sixth capacitor C6, a seventh capacitor C7, and a high-frequency transformer T1, the sixth capacitor C6 is an electrolytic capacitor, the high-frequency transformer T1 includes a primary coil and a secondary coil, one end of the eleventh resistor R11 is a positive output terminal of the voltage sampling circuit, the other end of the eleventh resistor R11 is connected to the positive electrode of the fifth diode D5, the negative electrode of the fifth diode D5 is connected to one end of the primary coil of the high-frequency transformer T1, the other end of the primary coil of the high-frequency transformer T1 is a negative output terminal of the voltage sampling circuit, one end of the secondary coil of the high-frequency transformer T1 is connected to the positive electrode of the sixth diode D6, the negative electrode of the sixth capacitor C6 is connected to one end of the seventh capacitor C7, the connection terminal is a positive input terminal of the voltage sampling circuit, the other end of the secondary coil of the high-frequency transformer T1, the negative electrode of the seventh capacitor C6 is connected to the negative terminal of the voltage sampling circuit.

Embodiment four: this embodiment is substantially the same as embodiment three except that: as shown in fig. 3, in the present embodiment, the step-up constant voltage circuit includes a second integrated circuit U2, a twelfth resistor R12, a thirteenth resistor R13, a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R19, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a seventh diode D7, an eighth diode D8, a ninth diode D9, a second NMOS transistor Q2, and a second inductance, the seventh diode D7, the eighth diode D8, and the ninth diode D9 being rectifier diodes, the fourteenth capacitor C14 being electrolytic capacitors, the second inductance having two coils respectively referred to as a third coil L2-N1 and a fourth coil L2-N2, one end of the eighth capacitor C8, one end of the thirteenth resistor R13 and one end of the third coil L2-N1 are connected, the connection end is the positive pole of the voltage boosting constant voltage circuit, the other end of the thirteenth resistor R13, the negative pole of the ninth diode D9, one end of the tenth capacitor C10 and the 8 th pin of the second integrated circuit U2 are connected, one end of the nineteenth resistor R19 and the 5 th pin of the second integrated circuit U2 are connected, the positive pole of the ninth diode D9, the negative pole of the eighth diode D8 and one end of the twelfth resistor R12 are connected, the other end of the twelfth resistor R12 and one end of the ninth capacitor C9 are connected, the other end of the ninth resistor R19 and one end of the fourth coil L2-N2 are connected, the 2 nd pin of the second integrated circuit U2, one end of the eleventh capacitor C11 and one end of the fourteenth resistor R14 are connected, the other end of the fourteenth resistor R14 is connected with one end of the twelfth capacitor C12, the fourth pin of the second integrated circuit U2 is connected to the gate of the second NMOS transistor Q2, the 4 th pin of the second integrated circuit U2, the source of the second NMOS transistor Q2, and one end of the fifteenth resistor R15 are connected, the 3 rd pin of the second integrated circuit U2 is an enable end of the boost constant voltage circuit, the 1 st pin of the second integrated circuit U2, one end of the thirteenth capacitor C13, one end of the seventeenth resistor R17, and one end of the eighteenth resistor R18 are connected, the other end of the seventeenth resistor R17 is connected to one end of the sixteenth resistor R16, the other end of the sixteenth resistor R16, the negative electrode of the seventh diode D7, the positive electrode of the fourteenth capacitor C14, the positive electrode of the seventh diode D7, the other end of the third coil L2-N1, the drain of the second NMOS transistor Q2 are connected, the other end of the fifteenth resistor R15, the other end of the eighteenth resistor R18, the other end of the eighth capacitor C8, the other end of the tenth capacitor C10, the other end of the eleventh capacitor C11, the other end of the thirteenth capacitor C12, the fourth capacitor C12, the other end of the fourth capacitor C2-N2, and the other end of the eighth capacitor C2 are connected to the positive electrode of the eighth diode D2 and the negative electrode of the eighth integrated circuit.

In this embodiment, the rectifying circuit is implemented by using a full-bridge rectifying bridge Db, the 1 st leg of the full-bridge rectifying bridge Db is a zero line input end of the rectifying circuit, the 3 rd leg of the full-bridge rectifying bridge Db is a live wire input end of the rectifying circuit, the 2 nd leg of the full-bridge rectifying bridge Db is a positive output end of the rectifying circuit, and the 4 th leg of the full-bridge rectifying bridge Db is a negative output end of the rectifying circuit.

In this embodiment, the second integrated circuit U2 with the model MT9570 in the boost constant voltage circuit has an enable end, and the enable end is associated with the current output by the output end of the dimming constant current circuit, so that the current output by the output end of the dimming constant current circuit is not zero, the current enters the working state, the current output by the output end of the dimming constant current circuit is zero, the current enters the dormant state, and the power consumption is reduced on the basis of not increasing additional cost, thereby realizing low cost and energy saving.

In summary, according to the non-isolated LED lamp circuit with the dimming of 0-10V, the boost constant voltage circuit and the dimming constant current circuit adopt a two-stage conversion mode, so that low harmonic wave of input current and low ripple wave of output current are achieved, the light frequency flash of the LED light-emitting circuit during light emission is reduced, the conversion efficiency is high, meanwhile, on the basis of not additionally adding other control circuits, the current output by the dimming constant current circuit, namely, the state of whether the LED light-emitting circuit emits light or not is associated with the working state of the boost constant voltage circuit, and the boost constant voltage circuit enters a dormant state when the LED light-emitting circuit does not emit light, so that low cost and low energy consumption are realized.

Claims

1. The 0-10V dimming non-isolated LED lamp circuit comprises a fire wire input end and a zero wire input end which are used for being connected with a mains voltage, and a positive signal end and a negative signal end which are used for being connected with a voltage signal output by a 0-10V dimmer, wherein the 0-10V dimming non-isolated LED lamp circuit comprises a dimming power supply circuit and an LED luminous circuit, the LED luminous circuit is provided with a positive electrode and a negative electrode, and is characterized in that the dimming power supply circuit comprises a rectifying circuit, a boosting constant voltage circuit, a dimming constant current circuit and a voltage sampling circuit, the rectifying circuit is provided with a fire wire input end, a zero wire input end, a positive output end and a negative output end, the boosting constant voltage circuit is provided with an input end, an output end and a negative electrode, the dimming constant current circuit adopts a non-isolated voltage reduction conversion mode and is provided with a positive electrode, a negative electrode, an output end, a detection end and a detection end negative electrode, the voltage sampling circuit is provided with a positive input end, a negative input end, a positive output end and a negative output end, the positive electrode of the LED light-emitting circuit, the positive electrode of the light-adjusting constant-current circuit and the output end of the voltage boosting constant-voltage circuit are connected, the negative electrode of the LED light-emitting circuit is connected with the output end of the light-adjusting constant-current circuit, the positive electrode of the detection end of the light-adjusting constant-current circuit is connected with the positive output end of the voltage sampling circuit, the negative electrode of the light-adjusting constant-current circuit is connected with the negative output end of the voltage sampling circuit, the negative electrode of the light-adjusting constant-current circuit, the negative electrode of the voltage boosting constant-current circuit is connected with the negative output end of the rectifying circuit, the live wire input end of the rectifying circuit is connected with the live wire input end of the 0-10V light-adjusting non-isolation LED lamp circuit, the zero line input end of the rectifying circuit is connected with the zero line input end of the 0-10V dimming non-isolated LED lamp circuit, the positive input end of the voltage sampling circuit is connected with the positive signal end of the 0-10V dimming non-isolated LED lamp circuit, and the negative input end of the voltage sampling circuit is connected with the negative signal end of the 0-10V dimming non-isolated LED lamp circuit.

2. The non-isolated LED lamp circuit with 0-10V dimming according to claim 1, wherein the voltage boosting constant-voltage circuit is further provided with an enabling end, the dimming constant-current circuit is further provided with a state signal end, the enabling end of the voltage boosting constant-voltage circuit is connected with the state signal end of the dimming constant-current circuit, the enabling end of the voltage boosting constant-voltage circuit is used for being connected with a voltage signal entering a working state or carrying out a dormant state, and the state signal end of the dimming constant-current circuit is used for outputting the voltage signal entering the working state or carrying out the dormant state.

3. The non-isolated LED lamp circuit with dimming of 0-10V according to claim 2, wherein the dimming constant current circuit comprises a first integrated circuit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, a tenth resistor, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first NMOS diode, a first inductor, the fifth capacitor is an electrolytic capacitor, the first diode is a zener diode, the second diode, the third diode and the fourth diode are rectifier diodes, the first inductor comprises two coils respectively called a first coil and a second coil, one end of the first resistor is connected to one end of the second resistor, one end of the first resistor is connected to a positive terminal of the first diode, the other end of the first resistor is connected to a second terminal of the first diode, the second resistor, the other end of the first diode is connected to the other end of the fourth resistor, the first diode is connected to the first resistor, the first resistor is connected to the other end of the first resistor is connected to the first resistor, the other end of the sixth resistor is connected with one end of the third capacitor, one end of the fourth capacitor is connected with the 5 th pin of the first integrated circuit, the connecting end of the fourth capacitor is the positive electrode of the detecting end of the dimming constant current circuit, the 6 th pin of the first integrated circuit is the negative electrode of the detecting end of the dimming constant current circuit, the negative electrode of the third diode, one end of the seventh resistor is connected with the 8 th pin of the first integrated circuit, the grid electrode of the first NMOS tube is connected with the 4 th pin of the first integrated circuit, the source electrode of the first NMOS tube, one end of the eighth resistor is connected with one end of the ninth resistor, the other end of the eighth resistor is connected with the 3 rd pin of the first integrated circuit, the drain electrode of the first NMOS tube, the positive electrode of the fourth diode is connected with one end of the first coil, the other end of the first coil, the negative electrode of the fifth capacitor and one end of the tenth resistor are connected, the connecting end of the fifth resistor is the output end of the dimming constant current circuit, the other end of the seventh resistor, the other end of the tenth resistor, the negative electrode of the fourth diode and the positive electrode of the fifth capacitor are connected, the connecting end of the fourth resistor is the positive electrode of the dimming constant current circuit, the other end of the second resistor, the other end of the fourth resistor, the other end of the ninth resistor, the other end of the first capacitor, the other end of the second capacitor, the other end of the third capacitor, the other end of the fourth capacitor, the 7 th pin of the first integrated circuit and the other end of the second coil are connected, and the connecting end is the negative electrode of the dimming constant current circuit.

4. The non-isolated LED lamp circuit with dimming of 0-10V according to claim 3, wherein the voltage sampling circuit comprises an eleventh resistor, a fifth diode, a sixth capacitor, a seventh capacitor and a high-frequency transformer, the sixth capacitor is an electrolytic capacitor, the high-frequency transformer comprises a primary coil and a secondary coil, one end of the eleventh resistor is a positive output end of the voltage sampling circuit, the other end of the eleventh resistor is connected with an anode of the fifth diode, a cathode of the fifth diode is connected with one end of the primary coil of the high-frequency transformer, the other end of the primary coil of the high-frequency transformer is a negative output end of the voltage sampling circuit, one end of the secondary coil of the high-frequency transformer is connected with an anode of the sixth diode, the cathode of the sixth capacitor is connected with one end of the seventh capacitor, and the other end of the negative end of the high-frequency transformer is connected with the negative input end of the voltage sampling circuit.

5. The non-isolated LED lamp circuit of claim 4, wherein the boost constant voltage circuit comprises a second integrated circuit having a model MT9750, a twelfth resistor, a thirteenth resistor, a fourteenth resistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a seventh diode, an eighth diode, a ninth diode, a second NMOS tube, and a second inductor, wherein the seventh diode, the eighth diode, and the ninth diode are rectifier diodes, the fourteenth capacitor is an electrolytic capacitor, the second inductor has two coils, which are respectively referred to as a third coil and a fourth coil, one end of the eighth capacitor, one end of the thirteenth resistor and one end of the third coil are connected, the connection end of the thirteenth resistor, the negative electrode of the ninth diode, one end of the tenth capacitor and the 8 th pin of the second integrated circuit are connected, one end of the nineteenth resistor is connected with the 5 th pin of the second integrated circuit, the positive electrode of the ninth diode, the negative electrode of the eighth diode and one end of the twelfth resistor are connected, the other end of the twelfth resistor is connected with one end of the ninth capacitor, the other end of the nineteenth resistor and one end of the fourth coil are connected, the 2 nd pin of the second integrated circuit, one end of the eleventh capacitor is connected with one end of the fourteenth resistor, the other end of the thirteenth resistor is connected with one end of the twelfth capacitor, the 7 th pin of the second integrated circuit is connected with the grid electrode of the second NMOS tube, the 4 th pin of the second integrated circuit, the source electrode of the second NMOS tube and one end of the fifteenth resistor are connected, the 3 rd pin of the second integrated circuit is the enabling end of the voltage boosting constant circuit, the 1 st pin of the second integrated circuit, one end of the thirteenth resistor, one end of the seventeenth resistor and one end of the eighteenth resistor are connected, the negative electrode of the seventh diode is connected with the positive electrode of the fourteenth capacitor, the connection end of the voltage boosting circuit is the output end of the voltage boosting constant circuit, the positive electrode of the seventh diode, the positive electrode of the third coil of the NMOS tube is connected with the negative electrode of the eighth resistor, the other end of the eighth resistor is connected with the other end of the eighth resistor, the other end of the eighth resistor is connected with the drain electrode of the eighth resistor, the other end of the eighth resistor is connected with the eighth resistor.