CN210381400U - Dimmable linear LED lamp circuit - Google Patents
Dimmable linear LED lamp circuit Download PDFInfo
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- CN210381400U CN210381400U CN201920661866.5U CN201920661866U CN210381400U CN 210381400 U CN210381400 U CN 210381400U CN 201920661866 U CN201920661866 U CN 201920661866U CN 210381400 U CN210381400 U CN 210381400U
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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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses a linear LED lamp circuit of can adjusting luminance, including rectifier circuit, one-way open circuit, dimming control circuit, LED luminescent circuit and linear constant current circuit, LED luminescent circuit includes first LED light emitting module and second LED light emitting module, and dimming control circuit cooperates linear constant current circuit to control LED luminescent circuit, makes first LED light emitting module luminous and second LED light emitting module not luminous, or makes first LED light emitting module and second LED light emitting module luminous or luminous simultaneously; the dimming control circuit has the advantages that when the dimming control circuit is used in a 220-plus-240V power grid, the conduction time of the first output end of the dimming control circuit can be reduced, the power consumption and the heat generation of the dimming control circuit are reduced, and the light emitting efficiency is higher.
Description
Technical Field
The utility model relates to a linear LED lamp circuit especially relates to a linear LED lamp circuit that can adjust luminance.
Background
The linear LED lamp capable of adjusting the light is more and more popular with users due to low cost and no noise in working, and is widely applied. Currently, the commercial power with the dimmer has two output ends, namely a commercial power live wire connecting end and a commercial power zero line connecting end, the dimmable linear LED lamp is connected with the commercial power live wire connecting end and the commercial power zero line connecting end, the brightness of the dimmable linear LED lamp is controlled by adjusting the dimmer, thereby realizing the dimming of the dimmable linear LED lamp,
a dimmable linear LED lamp generally comprises a structural component for connecting to a mains output and a dimmable linear LED lamp circuit connected to the structural component. The existing dimmable linear LED lamp circuit includes a rectifying circuit, a unidirectional current-passing circuit, a dimming control circuit and an LED light-emitting circuit, as shown in fig. 1, the rectifying circuit has a live wire input end, a zero line input end, an output end and a ground end, and the rectifying circuit is used for converting a commercial power ac voltage into a pulsating dc voltage to the output end thereof; the unidirectional current-passing circuit has a positive electrode and a negative electrode, and is conducted when current flows from the positive electrode to the negative electrode; the dimming control circuit is provided with a positive electrode, a first output end, a second output end and a grounding end; the LED light-emitting circuit is provided with a positive electrode and a negative electrode; the live wire input end of the rectification circuit is connected with a live wire connecting end of a mains supply, the zero line input end of the rectification circuit is connected with the zero line connecting end of the mains supply, the output end of the rectification circuit, the positive pole of the unidirectional flow circuit is connected with the first output end of the dimming control circuit, the negative pole of the unidirectional flow circuit, the positive pole of the dimming control circuit is connected with the positive pole of the LED light-emitting circuit, the second output end of the dimming control circuit is connected with the negative pole of the LED light-emitting circuit, the grounding end of the rectification circuit is connected with the grounding end of the dimming control circuit, when no current flows through the second output end of the dimming control circuit, the first output end of the dimming control circuit conducts with constant current to the grounding end, therefore, a working circuit is provided for a dimmer connected to the mains supply power, when the current flows through the second. When the voltage of the output end of the rectification circuit is more than or equal to the conduction voltage of the LED light-emitting circuit, the second output end of the dimming control circuit is conducted with constant current with the grounding end, and meanwhile, the first output end of the dimming control circuit is cut off from the grounding end, and at the moment, the LED light-emitting circuit is conducted and emits light. When the LED light-emitting circuit emits light, the output current of the first output end of the dimming control circuit is turned off, so that the power consumption can be reduced, and the light-emitting efficiency of the dimmable LED lamp circuit is improved.
The dimmable linear LED lamp circuit is currently widely used in a 120V commercial power grid with 100V and 240V, but when the dimmable linear LED lamp circuit is used in a 240V power grid with 220V, because the LED light-emitting circuit usually has a higher operating voltage, the on-time of the first output terminal of the dimming control circuit is longer during dimming, so that the power consumption and the heat generation of the dimming control circuit are increased, and finally the light-emitting efficiency of the linear LED lamp is reduced.
Disclosure of Invention
The utility model aims to solve the technical problem that a when using in 220 supplyes 240V electric wire netting, can reduce the on-time of dimming control circuit's first output, reduce dimming control circuit's consumption and generate heat, the linear LED lamp circuit that the luminous efficacy is higher can adjust luminance is provided.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a linear LED lamp circuit capable of adjusting light comprises a rectifying circuit, a unidirectional flow circuit, a light adjusting control circuit and an LED light emitting circuit, wherein the rectifying circuit is provided with a live wire input end, a zero wire input end, an output end and a grounding end, the unidirectional flow circuit is provided with a positive electrode and a negative electrode, the live wire input end of the rectifying circuit is connected with a live wire connecting end of mains supply, the zero wire input end of the rectifying circuit is connected with a zero wire connecting end of the mains supply, the linear LED lamp circuit further comprises a linear constant current circuit, the linear constant current circuit is provided with an output end and a grounding end, the LED light emitting circuit comprises a first LED light emitting module and a second LED light emitting module, the first LED light emitting module and the second LED light emitting module are respectively provided with a positive electrode and a negative electrode, the light adjusting control circuit is provided with a positive electrode, a control end, a first output end, the output end of the rectification circuit, the positive pole of the unidirectional current-passing circuit and the first output end of the dimming control circuit are connected, the negative pole of the unidirectional current-passing circuit, the positive pole of the dimming control circuit and the positive pole of the first LED light-emitting module are connected, the second output end of the dimming control circuit, the negative pole of the first LED light-emitting module and the positive pole of the second LED light-emitting module are connected, the output end of the linear constant current circuit and the negative pole of the second LED light-emitting module are connected, the grounding end of the linear constant current circuit and the control end of the dimming control circuit are connected, the grounding end of the rectification circuit and the grounding end of the dimming control circuit are connected, the dimming control circuit is used for judging whether current flows through the first LED light-emitting module or not, when no current flows through the first LED light-emitting module, the first output end of the dimming control circuit is in constant current conduction with the grounding end of the dimming control circuit, a working loop is provided for a dimmer connected to mains supply, and when current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to be cut off with the grounding end of the dimming control circuit.
The voltage between the positive pole and the negative pole when the first LED light-emitting module is conducted is recorded as V1, the voltage between the positive pole and the negative pole when the second LED light-emitting module is conducted is recorded as V2, after the input end of the rectifying circuit is connected with a mains supply, the output end of the rectifying circuit outputs pulsating direct current voltage, the voltage value of the pulsating direct current voltage periodically changes along with the change of time from zero voltage to the peak value of the alternating current voltage of the mains supply, when the voltage value of the output end of the rectifying circuit is smaller than V1, the first LED light-emitting module and the second LED light-emitting module can not be conducted and can not emit light, but the first output end of the dimming control circuit and the grounding end of the dimming control circuit are conducted by constant current, when the voltage of the output end of the rectifying circuit is larger than or equal to V1 and smaller than V1+ V2, the second output end of the dimming control circuit and the grounding end of the dimming control circuit are conducted by constant current, the first LED light-emitting module is in a conducting state, the first LED light-emitting module emits light, the second LED light-emitting module is in a non-conducting state, the second LED light-emitting module does not emit light, meanwhile, the first output end of the dimming control circuit is cut off from the ground end of the dimming control circuit, when the voltage value of the output end of the rectifying circuit is larger than or equal to V1+ V2, the output end of the linear constant current circuit is conducted with the ground end of the linear constant current circuit in a constant current mode, the first output end of the dimming control circuit is cut off from the second output end of the dimming control circuit, the first LED light-emitting module and the second LED light-emitting module are in a series connection state at the moment, the first LED light-emitting module and the second LED light-emitting module are both in a conducting state and emit.
The linear constant current circuit comprises a first resistor, a second resistor, a third resistor, a first diode and a first integrated circuit chip with the model of SM2091, the first diode is a rectifier diode, the anode of the first diode is the output end of the linear constant current circuit, the cathode of the first diode and one end of the first resistor are connected with the 7 th pin of the first integrated circuit chip, the other end of the first resistor and one end of the second resistor are connected with the 4 th pin of the first integrated circuit chip, the 2 nd pin of the first integrated circuit chip is connected with one end of the third resistor, the 1 st pin of the first integrated circuit chip, the other end of the second resistor and the other end of the third resistor are connected, and the connecting end of the first integrated circuit chip and the other end of the second resistor are grounded ends of the linear constant current circuit. The linear constant current circuit has good linear regulation rate, can output power with the same size when the voltage fluctuation of the mains supply is large, can directly adopt a plurality of first integrated circuit chips to be connected in parallel in the linear constant current circuit and then be used together to improve the output power when the large power is required to be applied, and is convenient to expand the power.
The dimming control circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor and a second integrated circuit chip with the model of MT7623, wherein one end of the fourth resistor is a first output end of the dimming control circuit, the other end of the fourth resistor is connected with a pin 3 of the second integrated circuit chip, one end of the fifth resistor is the anode of the dimming control circuit, the other end of the fifth resistor is connected with a pin 5 of the second integrated circuit chip, a pin 4 of the second integrated circuit chip is a second output end of the dimming control circuit, a pin 6 of the second integrated circuit chip is connected with one end of the sixth resistor, the connecting end of the pin 6 of the second integrated circuit chip is a control end of the dimming control circuit, a pin 7 of the second integrated circuit chip is connected with one end of the first capacitor, the bottom electrode of the second integrated circuit chip, the other end of the first capacitor and the other end of the sixth resistor are connected, and the connecting end of the second integrated circuit chip is the grounding end of the dimming control circuit. The dimming control circuit adopts a universal linear dimming integrated circuit chip, and has the advantages of simple circuit, low cost and good dimming compatibility.
Rectifier circuit adopt full-bridge rectifier bridge to pile up and realize, full-bridge rectifier bridge pile's the 1 st foot do rectifier circuit's live wire input end, full-bridge rectifier bridge pile's the 3 rd foot do rectifier circuit's zero line input end, full-bridge rectifier bridge pile's the 2 nd foot do rectifier circuit's output, full-bridge rectifier bridge pile's the 4 th foot do rectifier circuit's earthing terminal.
The unidirectional current-passing circuit comprises a second diode, the second diode is a rectifier diode, the anode of the second diode is the anode of the unidirectional current-passing circuit, and the cathode of the second diode is the cathode of the unidirectional current-passing circuit.
The linear LED lamp circuit further comprises a filter circuit, the filter circuit is provided with an anode and a cathode, the anode of the filter circuit is connected with the anode of the first LED light-emitting module, and the cathode of the filter circuit is connected with the cathode of the second LED light-emitting module. The filter circuit can reduce the light emitting stroboflash of the first LED light emitting module and the second LED light emitting module, and further improve the light emitting efficiency of the linear LED lamp circuit.
The filter circuit comprises a second capacitor and a seventh resistor, the second capacitor is an electrolytic capacitor, the anode of the second capacitor is connected with one end of the seventh resistor, the connecting end of the second capacitor is the anode of the filter circuit, the cathode of the second capacitor is connected with the other end of the seventh resistor, and the connecting end of the second capacitor is the cathode of the filter circuit.
Compared with the prior art, the utility model has the advantages that by arranging the linear constant current circuit, the linear constant current circuit is provided with an output end and a grounding end, the LED luminous circuit comprises a first LED luminous module and a second LED luminous module, the first LED luminous module and the second LED luminous module are respectively provided with a positive pole and a negative pole, the dimming control circuit is provided with a positive pole, a control end, a first output end, a second output end and a grounding end, the output end of the rectifying circuit, the positive pole of the unidirectional flow circuit and the first output end of the dimming control circuit are connected, the negative pole of the unidirectional flow circuit, the positive pole of the dimming control circuit and the positive pole of the first LED luminous module are connected, the second output end of the dimming control circuit, the negative pole of the first LED luminous module and the positive pole of the second LED luminous module are connected, the output end of the linear constant current circuit and the negative pole of the second LED luminous module are connected, the grounding end of the linear constant current circuit and the, the grounding end of the rectification circuit is connected with the grounding end of the dimming control circuit, the dimming control circuit is used for judging whether current flows through the first LED light-emitting module, when no current flows through the first LED light-emitting module, the first output end of the dimming control circuit is conducted to the grounding end in a constant current mode to provide a working loop for a dimmer connected to a mains supply, when current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to be cut off from the grounding end, because the LED light-emitting circuit comprises the first LED light-emitting module and the second LED light-emitting module, when the dimming control circuit is used in a 220-plus 240V power grid, the voltage of the first LED light-emitting module can be lower, and in a change period of pulsating direct current voltage generated by the output end of the rectification circuit, when current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to be, and the conduction time of the first output end of the dimming control circuit is shortened, so that the power consumption and the heat generation of the dimming control circuit are reduced, and the luminous efficiency of the linear LED lamp circuit is improved.
Drawings
FIG. 1 is a schematic block diagram of a conventional dimmable linear LED lamp circuit;
fig. 2 is a schematic block diagram of a structure of a dimmable linear LED lamp circuit according to a first embodiment of the present invention;
fig. 3 is a schematic block diagram of a structure of a dimmable linear LED lamp circuit according to an embodiment of the present invention;
fig. 4 is a circuit diagram of a dimmable linear LED lamp circuit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The first embodiment is as follows: as shown in FIG. 2, a linear LED lamp circuit with adjustable light comprises a rectifying circuit, a unidirectional current circuit, a light adjusting control circuit and an LED light emitting circuit, wherein the rectifying circuit has a live wire input end, a null wire input end, an output end and a grounding end, the unidirectional current circuit has a positive electrode and a negative electrode, the live wire input end of the rectifying circuit is connected with a live wire connection end of a mains supply, the null wire input end of the rectifying circuit is connected with a null wire connection end of the mains supply, the linear LED lamp circuit further comprises a linear constant current circuit, the linear constant current circuit has an output end and a grounding end, the LED light emitting circuit comprises a first LED light emitting module and a second LED light emitting module, the first LED light emitting module and the second LED light emitting module respectively have a positive electrode and a negative electrode, the light adjusting control circuit has a positive electrode, a control end, a first output end, a second output end and a grounding end, the negative pole of the unidirectional current-passing circuit, the positive pole of the dimming control circuit and the positive pole of the first LED light-emitting module are connected, the second output end of the dimming control circuit, the negative pole of the first LED light-emitting module and the positive pole of the second LED light-emitting module are connected, the output end of the linear constant current circuit and the negative pole of the second LED light-emitting module are connected, the grounding end of the linear constant current circuit is connected with the control end of the dimming control circuit, the grounding end of the rectifying circuit is connected with the grounding end of the dimming control circuit, the dimming control circuit is used for judging whether current flows through the first LED light-emitting module or not, when no current flows through the first LED light-emitting module, the first output end of the dimming control circuit is conducted to the grounding end of the first LED light-emitting module in a constant current mode to provide a working loop for a dimmer connected with commercial power, when current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to cut off the grounding end of the dimming control circuit. When the voltage value of the output end of the rectifying circuit is less than V1, the first LED light-emitting module and the second LED light-emitting module can not be conducted and can not emit light, but the first output end of the dimming control circuit and the ground end of the dimming control circuit are conducted by constant current at the moment, when the voltage value of the output end of the rectifying circuit is more than or equal to V1 and is less than V1+ V2, the second output end of the dimming control circuit and the ground end of the dimming control circuit are conducted by constant current, and the first LED light-emitting module is in a conducting state, the first LED light-emitting module emits light, the second LED light-emitting module is in a non-conduction state, the second LED light-emitting module does not emit light, meanwhile, the first output end of the dimming control circuit is connected with the ground end of the dimming control circuit in a constant current mode, when the voltage value of the output end of the rectifying circuit is larger than or equal to V1+ V2, the output end of the linear constant current circuit is connected with the ground end of the linear constant current circuit in a constant current mode, the first output end of the dimming control circuit is connected with the second output end of the dimming control circuit in a series connection mode, the first LED light-emitting module and the second LED light-emitting module are in a conduction state, and both the.
Example two: as shown in FIG. 3, a linear LED lamp circuit with adjustable light comprises a rectifying circuit, a unidirectional current circuit, a light-adjusting control circuit and an LED light-emitting circuit, wherein the rectifying circuit has a live wire input end, a zero wire input end, an output end and a grounding end, the unidirectional current circuit has a positive electrode and a negative electrode, the live wire input end of the rectifying circuit is connected with a live wire connection end of a mains supply, the zero wire input end of the rectifying circuit is connected with a zero wire connection end of the mains supply, the linear LED lamp circuit further comprises a linear constant current circuit and a filter circuit, the linear constant current circuit has an output end and a grounding end, the filter circuit has a positive electrode and a negative electrode, the LED light-emitting circuit comprises a first LED light-emitting module and a second LED light-emitting module, the first LED light-emitting module and the second LED light-emitting module respectively have a positive electrode and a negative, The positive pole of the unidirectional current-passing circuit, the positive pole of the dimming control circuit and the positive pole of the first LED light-emitting module are connected, the second output end of the dimming control circuit and the negative pole of the first LED light-emitting module are connected, the positive pole of the filter circuit and the positive pole of the first LED light-emitting module are connected, the negative pole of the filter circuit and the negative pole of the second LED light-emitting module are connected, the output end of the linear constant current circuit and the negative pole of the second LED light-emitting module are connected, the grounding end of the linear constant current circuit is connected with the control end of the dimming control circuit, the grounding end of the rectifier circuit is connected with the grounding end of the dimming control circuit, the dimming control circuit is used for judging whether current flows through the first LED light-emitting module or not, and when no current flows through the first LED light-emitting module, the first output end of the dimming control circuit is conducted to the grounding end of the constant current control circuit, and when current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to be cut off to the grounding end of the dimming control circuit. When the voltage value of the output end of the rectifying circuit is less than V1, the first LED light-emitting module and the second LED light-emitting module can not be conducted and can not emit light, but the first output end of the dimming control circuit and the ground end of the dimming control circuit are conducted by constant current at the moment, when the voltage value of the output end of the rectifying circuit is more than or equal to V1 and is less than V1+ V2, the second output end of the dimming control circuit and the ground end of the dimming control circuit are conducted by constant current, and the first LED light-emitting module is in a conducting state, the first LED light-emitting module emits light, the second LED light-emitting module is in a non-conduction state, the second LED light-emitting module does not emit light, meanwhile, the first output end of the dimming control circuit is connected with the ground end of the dimming control circuit in a constant current mode, when the voltage value of the output end of the rectifying circuit is larger than or equal to V1+ V2, the output end of the linear constant current circuit is connected with the ground end of the linear constant current circuit in a constant current mode, the first output end of the dimming control circuit is connected with the second output end of the dimming control circuit in a series connection mode, the first LED light-emitting module and the second LED light-emitting module are in a conduction state, and both the.
As shown in fig. 4, in the embodiment, the linear constant current circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a first diode D1, and a first integrated circuit chip U1 with a model number of SM2091, the first diode D1 is a rectifier diode, the anode of the first diode D1 is an output terminal of the linear constant current circuit, the cathode of the first diode D1 and one end of the first resistor R1 are connected to the 7 th pin of the first integrated circuit chip U1, the other end of the first resistor R1 and one end of the second resistor R2 are connected to the 4 th pin of the first integrated circuit chip U1, the 2 nd pin of the first integrated circuit chip U1 is connected to one end of the third resistor R3, the 1 st pin of the first integrated circuit chip U1, the other end of the second resistor R2 is connected to the other end of the third resistor R3, and the connection end is a ground terminal of the linear constant current circuit.
As shown in fig. 4, in this embodiment, the dimming control circuit includes a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, and a second integrated circuit chip U2 with a model MT7623, one end of the fourth resistor R4 is a first output end of the dimming control circuit, the other end of the fourth resistor R4 is connected to the 3 rd pin of the second integrated circuit chip U2, one end of the fifth resistor R5 is an anode of the dimming control circuit, the other end of the fifth resistor R5 is connected to the 5 th pin of the second integrated circuit chip U2, the 4 th pin of the second integrated circuit chip U2 is a second output end of the dimming control circuit, the 6 th pin of the second integrated circuit chip U2 is connected to one end of the sixth resistor R6, and the connection end thereof is a control end of the dimming control circuit, the 7 th pin of the second integrated circuit chip U2 is connected to one end of the first capacitor C1, and the bottom electrode of the second integrated circuit chip U2 is connected to the first integrated circuit chip U2, The other end of the first capacitor C1 is connected to the other end of the sixth resistor R6, and the connection end is the ground end of the dimming control circuit.
As shown in fig. 4, in this embodiment, the rectifying circuit is implemented by using a full-bridge rectifier bridge stack, the 1 st pin of the full-bridge rectifier bridge stack is the live wire input end of the rectifying circuit, the 3 rd pin of the full-bridge rectifier bridge stack is the zero line input end of the rectifying circuit, the 2 nd pin of the full-bridge rectifier bridge stack is the output end of the rectifying circuit, and the 4 th pin of the full-bridge rectifier bridge stack is the grounding end of the rectifying circuit.
As shown in fig. 4, in the present embodiment, the unidirectional current circuit includes a second diode D2, the second diode D2 is a rectifier diode, the anode of the second diode D2 is the anode of the unidirectional current circuit, and the cathode of the second diode D2 is the cathode of the unidirectional current circuit.
As shown in fig. 4, in this embodiment, the filter circuit includes a second capacitor C2 and a seventh resistor R7, the second capacitor C2 is an electrolytic capacitor, the anode of the second capacitor C2 is connected to one end of the seventh resistor R7, the connection end of the second capacitor C2 is the anode of the filter circuit, the cathode of the second capacitor C2 is connected to the other end of the seventh resistor R7, and the connection end of the second capacitor C2 is the cathode of the filter circuit.
As shown in fig. 4, in the embodiment, the first LED lighting module is formed by connecting n LED lighting units (LED1-1 to LED1-n) in series, where n is an integer greater than or equal to 1, and the second LED lighting module is formed by connecting k LED lighting units (LED2-1 to LED2-k) in series, where k is an integer greater than or equal to 1.
Claims (8)
1. The linear LED lamp circuit capable of adjusting light comprises a rectifying circuit, a unidirectional current circuit, a light-adjusting control circuit and an LED light-emitting circuit, wherein the rectifying circuit is provided with a live wire input end, a zero wire input end, an output end and a grounding end, the unidirectional current circuit is provided with a positive electrode and a negative electrode, the live wire input end of the rectifying circuit is connected with a live wire connecting end of a mains supply, and the zero wire input end of the rectifying circuit is connected with a zero wire connecting end of the mains supply The output end of the rectifying circuit, the positive pole of the unidirectional current-passing circuit and the first output end of the dimming control circuit are connected, the negative pole of the unidirectional current-passing circuit, the positive pole of the dimming control circuit and the positive pole of the first LED light-emitting module are connected, the second output end of the dimming control circuit, the negative pole of the first LED light-emitting module and the positive pole of the second LED light-emitting module are connected, the output end of the linear constant current circuit and the negative pole of the second LED light-emitting module are connected, the ground end of the linear constant current circuit is connected with the control end of the dimming control circuit, the ground end of the rectifying circuit and the ground end of the dimming control circuit are connected, and the dimming control circuit is used for judging whether current flows through the first LED light-emitting module or not, when no current flows through the first LED light-emitting module, the first output end of the dimming control circuit is in constant current conduction with the grounding end of the dimming control circuit, a working loop is provided for a dimmer connected to a mains supply, and when the current flows through the first LED light-emitting module, the dimming control circuit controls the first output end of the dimming control circuit to be cut off with the grounding end of the dimming control circuit.
2. The dimmable linear LED lamp circuit according to claim 1, wherein a voltage between the positive and negative electrodes when the first LED lighting module is turned on is denoted as V1, a voltage between the positive and negative electrodes when the second LED lighting module is turned on is denoted as V2, after the input terminal of the rectifying circuit is connected to the utility power, the output terminal of the rectifying circuit outputs a pulsating dc voltage, a voltage value of the pulsating dc voltage periodically changes with time between zero voltage and a peak value of the utility power ac voltage, when a voltage value of the output terminal of the rectifying circuit is less than V1, neither the first LED lighting module nor the second LED lighting module is turned on and does not emit light, but at this time, the first output terminal of the dimming control circuit is turned on with a constant current to the ground terminal thereof, and when a voltage of the output terminal of the rectifying circuit is greater than or equal to V1, when the voltage value of the output end of the rectifying circuit is more than or equal to V1+ V2, the output end of the linear constant current circuit is connected with the ground end of the linear constant current circuit at constant current, the first output end and the second output end of the dimming control circuit are both cut off, and at the moment, the first LED light-emitting module and the second LED light-emitting module are connected in series and are both in a conducting state, both of which emit light.
3. The dimmable linear LED lamp circuit according to claim 1, wherein the linear constant current circuit comprises a first resistor, a second resistor, a third resistor, a first diode and a first ic chip with model number SM2091, the first diode is a rectifier diode, the anode of the first diode is the output terminal of the linear constant current circuit, the cathode of the first diode, one end of the first resistor and the 7 th pin of the first ic chip are connected, the other end of the first resistor, one end of the second resistor and the 4 th pin of the first ic chip are connected, the 2 nd pin of the first ic chip and one end of the third resistor are connected, the 1 st pin of the first ic chip, the other end of the second resistor and the other end of the third resistor are connected, and the connection end of the first resistor, the other end of the second resistor and the other end of the third resistor are connected and the ground terminal of the linear constant current circuit.
4. The dimmable linear LED lamp circuit according to claim 1, wherein the dimming control circuit comprises a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor and a second ic chip with model MT7623, one end of the fourth resistor is a first output terminal of the dimming control circuit, the other end of the fourth resistor is connected to pin 3 of the second ic chip, one end of the fifth resistor is an anode of the dimming control circuit, the other end of the fifth resistor is connected to pin 5 of the second ic chip, pin 4 of the second ic chip is a second output terminal of the dimming control circuit, pin 6 of the second ic chip is connected to one end of the sixth resistor and is a control terminal of the dimming control circuit, the 7 th pin of the second integrated circuit chip is connected with one end of the first capacitor, the bottom electrode of the second integrated circuit chip, the other end of the first capacitor and the other end of the sixth resistor are connected, and the connecting end of the bottom electrode of the second integrated circuit chip, the other end of the first capacitor and the other end of the sixth resistor is the grounding end of the dimming control circuit.
5. A linear LED lamp circuit of adjustable light according to claim 1, characterized in that the said rectifier circuit is implemented by full bridge rectifier bridge stack, the 1 st pin of the said full bridge rectifier bridge stack is the live wire input end of the said rectifier circuit, the 3 rd pin of the said full bridge rectifier bridge stack is the zero line input end of the said rectifier circuit, the 2 nd pin of the said full bridge rectifier bridge stack is the output end of the said rectifier circuit, the 4 th pin of the said full bridge rectifier bridge stack is the earthing terminal of the said rectifier circuit.
6. A dimmable linear LED lamp circuit according to claim 1, wherein said unidirectional current path comprises a second diode, said second diode is a rectifier diode, an anode of said second diode is an anode of said unidirectional current path, and a cathode of said second diode is a cathode of said unidirectional current path.
7. A dimmable linear LED lamp circuit according to claim 1, further comprising a filter circuit, said filter circuit having an anode and a cathode, said anode of said filter circuit being connected to said anode of said first LED lighting module, said cathode of said filter circuit being connected to said cathode of said second LED lighting module.
8. The dimmable linear LED lamp circuit according to claim 7, wherein the filter circuit comprises a second capacitor and a seventh resistor, the second capacitor is an electrolytic capacitor, an anode of the second capacitor is connected to one end of the seventh resistor, a connection end of the second capacitor is an anode of the filter circuit, a cathode of the second capacitor is connected to the other end of the seventh resistor, and a connection end of the second capacitor is a cathode of the filter circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661866.5U CN210381400U (en) | 2019-05-09 | 2019-05-09 | Dimmable linear LED lamp circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661866.5U CN210381400U (en) | 2019-05-09 | 2019-05-09 | Dimmable linear LED lamp circuit |
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| CN210381400U true CN210381400U (en) | 2020-04-21 |
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| CN201920661866.5U Active CN210381400U (en) | 2019-05-09 | 2019-05-09 | Dimmable linear LED lamp circuit |
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Inventor after: Xu Xiaoqing Inventor after: Yu Xianxiao Inventor before: Yu Xianxiao |
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| CB03 | Change of inventor or designer information |