CN110312339B - Light-adjustable LED lamp circuit - Google Patents

Light-adjustable LED lamp circuit Download PDF

Info

Publication number
CN110312339B
CN110312339B CN201910436947.XA CN201910436947A CN110312339B CN 110312339 B CN110312339 B CN 110312339B CN 201910436947 A CN201910436947 A CN 201910436947A CN 110312339 B CN110312339 B CN 110312339B
Authority
CN
China
Prior art keywords
circuit
voltage
resistor
diode
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201910436947.XA
Other languages
Chinese (zh)
Other versions
CN110312339A (en
Inventor
俞贤晓
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Sunlight Illuminating Lamp Co ltd
Yingtan Yankon Lighting Co ltd
Zhejiang Yankon Group Co Ltd
Original Assignee
Zhejiang Sunlight Illuminating Lamp Co ltd
Yingtan Yankon Lighting Co ltd
Zhejiang Yankon Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Zhejiang Sunlight Illuminating Lamp Co ltd, Yingtan Yankon Lighting Co ltd, Zhejiang Yankon Group Co Ltd filed Critical Zhejiang Sunlight Illuminating Lamp Co ltd
Priority to CN201910436947.XA priority Critical patent/CN110312339B/en
Publication of CN110312339A publication Critical patent/CN110312339A/en
Application granted granted Critical
Publication of CN110312339B publication Critical patent/CN110312339B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The invention discloses a dimmable LED lamp circuit, which comprises a rectifying circuit, an LED light-emitting circuit, a unidirectional current circuit, a filter circuit, a constant current control circuit and a time-voltage conversion circuit, wherein the rectifying circuit is connected with an intelligent dimming controller, and the output end of the intelligent dimming controller has two output current states even if the output end of the intelligent dimming controller is kept in a conduction state in a variation period of mains voltage: the intelligent dimming controller performs chopping control on alternating-current voltage of a mains supply at a low-voltage moment when the output current is zero, and sends a control signal to an LED lamp circuit by controlling the chopping time; the intelligent dimming controller has the advantages that the intelligent dimming controller can be compatible with the intelligent dimming controller, and the intelligent dimming controller form an intelligent lighting system, so that the intelligent dimming controller has important significance for improving the market competitiveness of the dimmable LED lamp and expanding the application prospect of the dimmable LED lamp.

Description

Light-adjustable LED lamp circuit
Technical Field
The invention relates to an LED lamp circuit, in particular to a dimmable LED lamp circuit.
Background
At present, the working principle of a dimmable LED lamp is to perform chopping control on a sine wave voltage at an input end, and adjust an effective voltage at the input end, so as to control an input power of the dimmable LED lamp, and enable the dimmable LED lamp to emit brightness corresponding to the input effective voltage. The dimmable LED lamp comprises a support and a dimmable LED lamp circuit installed on the support, the dimmable LED lamp circuit is a main body part of the dimmable LED lamp, and the performance of the dimmable LED lamp directly depends on the performance of the dimmable LED lamp circuit.
The structure block diagram of the existing dimmable LED lamp circuit is shown in FIG. 1, which mainly comprises a rectifying circuit, a dimming matching circuit, a dimmable control circuit, a stroboscopic removing circuit and an LED light-emitting circuit, wherein the rectifying circuit is provided with a live wire input end, a zero line input end, an output end and a grounding end, the dimming matching circuit is provided with a positive pole and a negative pole, the adjustable light control circuit is provided with an input end, an output end and a grounding end, the stroboflash removing circuit is provided with a positive pole and a negative pole, the LED light-emitting circuit is provided with a positive pole and a negative pole, the output end of the rectifying circuit, the positive pole of the adjustable light matching circuit, the input end of the adjustable light control circuit are connected with the negative pole of the stroboflash removing circuit, the output end of the adjustable light control circuit is connected with the positive electrode of the LED light-emitting circuit, the negative electrode of the LED light-emitting circuit is connected with the positive electrode of the stroboscopic removing circuit, and the grounding end of the rectifying circuit, the grounding end of the adjustable light matching circuit and the grounding end of the adjustable light control circuit are connected.
The live wire of commercial power is connected with the controller of adjusting luminance, and the live wire input of the rectifier circuit of the LED lamp circuit of adjusting luminance is through being connected the commercial power live wire with the controller of adjusting luminance, and the zero line input of the rectifier circuit of the LED lamp circuit of adjusting luminance is direct to be connected with the commercial power zero line. At the moment of zero-crossing voltage of the alternating-current voltage of the mains supply, the dimming controller can be automatically turned off and can be turned on again only after being re-triggered. By adjusting the time from the turning-off of the dimming controller to the triggering and conducting of the dimming controller, chopping adjustment of alternating-current voltage (sine wave) output by mains supply can be achieved, so that the effective voltage size of the rectifying circuit access of the dimmable LED lamp circuit is controlled, and the light emitting brightness of the dimmable LED lamp is changed. The chopped AC voltage is converted into pulsating DC voltage through the rectifying circuit and then is output, the dimming control circuit converts the pulsating DC voltage input into the dimming control circuit into DC current with corresponding magnitude and outputs the DC current to the LED light-emitting circuit, and then the LED light-emitting circuit emits light after passing through the stroboscopic removing circuit.
The existing dimmable LED lamp circuit is mainly used in conjunction with a conventional dimming controller, which is designed for an incandescent lamp, although the conventional dimming controller has a variety of types. With the popularization of the intelligent dimming control technology, the dimming method of the traditional dimming controller cannot meet the requirements of users more and more, the intelligent dimming controller has the functions of intelligent communication and remote control, and the dimming modes are more, so that the traditional dimming controller is replaced in some application occasions. General intelligent light-adjusting controller has live wire input, zero line input, first output and second output usually, and intelligent light-adjusting controller's live wire input connects on the commercial electric wire, and intelligent light-adjusting controller's zero line input connects on the commercial electric wire, and the LED lamp circuit of current can not reach due best result of use because of having the matching circuit of adjusting luminance, and the consumption is great, when using with intelligent light-adjusting controller cooperation together.
Therefore, the design of the dimmable LED lamp circuit compatible with the intelligent dimming controller has important significance for improving the market competitiveness of the dimmable LED lamp and expanding the application prospect of the dimmable LED lamp.
Disclosure of Invention
The invention aims to solve the technical problem of providing a dimmable LED lamp circuit compatible with an intelligent dimming controller, wherein the intelligent dimming controller sends a control signal for adjusting the brightness of the LED lamp circuit to automatically adjust the brightness of the dimmable LED lamp circuit at the moment that the input current of the dimmable LED lamp circuit is zero.
The technical scheme adopted by the invention for solving the technical problems is as follows: a dimmable LED lamp circuit comprises a rectifying circuit and an LED light-emitting circuit, and further comprises a one-way current circuit, a filter circuit, a constant current control circuit and a time-voltage conversion circuit, wherein the rectifying circuit is connected with an intelligent dimming controller, and the voltage output by the intelligent dimming controller after chopping processing of mains supply alternating voltage comprises zero voltage at a zero voltage moment and non-zero voltage at a non-zero voltage moment; the filter circuit has an energy storage function, after the dimmable LED lamp circuit is connected to mains supply through the intelligent dimming controller, the voltage at two ends of the filter circuit is always maintained at more than half of the peak value of the mains supply alternating current voltage, and when the mains supply alternating current voltage passes through the intelligent dimming controller and the rectifying circuit, and the output voltage of the rectifying circuit is smaller than the voltage at two ends of the filter circuit, the input current of the rectifying circuit is zero; when the alternating-current voltage of the mains supply passes through the intelligent dimming controller and the rectifying circuit, and the output voltage of the rectifying circuit is more than or equal to the voltages at the two ends of the filter circuit, the one-way conduction circuit is conducted to charge the filter circuit and provide working voltage for the constant-current control circuit, at the moment, the input current of the rectifying circuit is not zero, so that the output end of the intelligent dimming controller has two output current states even if the output end of the intelligent dimming controller is kept in a conduction state in a variation cycle of the mains supply voltage: when the absolute value of the input alternating voltage is larger than or equal to the voltage at the two ends of the filter circuit, the output current is not zero, and when the absolute value of the input alternating voltage is smaller than the voltage at the two ends of the filter circuit, the output current is zero, the intelligent dimming controller performs chopping control on the alternating voltage of the mains supply at the low-voltage moment when the output current is zero, and sends a control signal to the LED lamp circuit by controlling the chopping time;
recording the maximum chopping time of the intelligent dimming controller as Tm, adjusting the chopping control time T of the intelligent dimming controller between 0 and Tm, and recording the sine wave period of the alternating-current voltage of the commercial power as 2T, wherein the chopped pulsating direct-current voltage output by the rectifying circuit is pulse voltage with the period of T, each period of the pulse voltage comprises zero voltage with the time of T and non-zero voltage with the time of T-T, a control voltage range for controlling the luminous intensity of the LED luminous circuit is arranged in the constant-current control circuit, the lower limit of the control voltage range is recorded as V1, and the upper limit of the control voltage range is recorded as V2; the time-voltage conversion circuit outputs a direct-current control voltage with corresponding magnitude according to the proportion of (T-T)/T of an accessed periodically-changed pulse voltage, the constant-current control circuit is accessed to the direct-current control voltage, when the direct-current control voltage is less than V1, the constant-current control circuit is cut off, the LED light-emitting circuit does not emit light, when the direct-current control voltage is more than or equal to V1 and less than or equal to V2, the constant-current control circuit is switched on, outputs direct current to control the LED light-emitting circuit to emit light, the direct current increases to the maximum value along with the increase of the direct-current control voltage, the light-emitting intensity of the LED light-emitting circuit is enhanced along with the increase of the direct current, when the direct-current control voltage is more than V2, the direct current output by the constant-current control circuit keeps the maximum value unchanged, the LED light-emitting circuit has the maximum light-emitting intensity.
The rectifier circuit is provided with a live wire input end, a zero line input end, an output end and a grounding end, the unidirectional current circuit is provided with an anode and a cathode, the filter circuit is provided with an anode and a cathode, the LED light-emitting circuit is provided with an anode and a cathode, the constant current control circuit is provided with an input end, an output end, a control end and a grounding end, the time-voltage conversion circuit is provided with an anode, an input end, an output end and a grounding end, the output end of the rectifier circuit and the input end of the time-voltage conversion circuit are connected with the anode of the unidirectional current circuit, the cathode of the unidirectional current circuit, the anode of the filter circuit, the input end of the constant current control circuit and the anode of the time-voltage conversion circuit are connected with the anode of the LED light-emitting circuit, and the output end of the constant current control circuit is connected with the cathode of the LED light-emitting circuit, the output end of the time-voltage conversion circuit is connected with the control end of the constant current control circuit, and the grounding end of the rectifying circuit, the grounding end of the time-voltage conversion circuit and the negative electrode of the filter circuit are connected with the grounding end of the constant current control circuit.
The time-voltage conversion circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a first diode, a second diode, a third diode and a first triode, wherein the first capacitor is an electrolytic capacitor, the second diode is a voltage stabilizing diode, the first triode is a PNP type triode, the first diode and the third diode are rectifier diodes, one end of the first resistor is the input end of the time-voltage conversion circuit, the other end of the first resistor, one end of the second resistor, the anode of the first diode and the base of the first triode are connected, one end of the third resistor is the anode of the time-voltage conversion circuit, and the other end of the third resistor is connected with the base of the first triode, One end of the fourth resistor, the negative electrode of the first diode and the negative electrode of the second diode are connected, the other end of the fourth resistor, one end of the fifth resistor and the emitter of the first triode are connected, the other end of the fifth resistor, the positive electrode of the first capacitor and the positive electrode of the third diode are connected, the negative electrode of the third diode, one end of the second capacitor and one end of the sixth resistor are connected, the connection end of the third diode, the negative electrode of the second capacitor and one end of the sixth resistor is the output end of the time-to-voltage conversion circuit, the other end of the second resistor, the collector of the first triode, the negative electrode of the first capacitor, the other end of the second capacitor and the other end of the sixth resistor are connected, and the connection end of the second resistor and the connection end of the sixth resistor is the grounding end of the time-to-voltage conversion circuit. The circuit adopts discrete components to realize all functions, and has high reliability and low cost.
The constant current control circuit comprises a first chip with the model of MT7816, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth diode, a fourth capacitor and a first inductor, wherein the fourth diode is a fast recovery rectifier diode, the fourth capacitor is an electrolytic capacitor, one end of the seventh resistor, the cathode of the fourth diode and the anode of the fourth capacitor are connected, the connecting end of the seventh resistor and the anode of the fourth capacitor is the input end of the constant current control circuit, the other end of the seventh resistor and one end of the third capacitor are connected with the 4 th pin of the first chip, the 2 nd pin of the first chip is the control end of the constant current control circuit, the 3 rd pin of the first chip is connected with one end of the eighth resistor, the 8 th pin of the first chip is connected with one end of the ninth resistor, the 5 th pin of the first chip, the ninth resistor and the first inductor are connected with the first capacitor, and the second capacitor is connected with the anode of the second capacitor, the fourth capacitor, The 6 th pin and the anode of the fourth diode are connected with one end of the first inductor, the other end of the first inductor is connected with the cathode of the fourth capacitor, the connecting end of the first inductor is the output end of the constant current control circuit, the other end of the third capacitor, the other end of the eighth resistor, the other end of the ninth resistor are connected with the 1 st pin of the first chip, and the connecting end of the third capacitor is the grounding end of the constant current control circuit. The circuit has reliable performance and low cost.
The unidirectional current circuit comprises a fifth diode, the fifth diode is a fast recovery rectifier diode, the anode of the fifth diode is the anode of the unidirectional current circuit, and the cathode of the fifth diode is the cathode of the unidirectional current circuit.
The filter circuit comprises a fifth capacitor, the fifth capacitor is an electrolytic capacitor, the anode of the fifth capacitor is the anode of the filter circuit, and the cathode of the fifth capacitor is the cathode end of the filter circuit.
Rectifier circuit adopt full-bridge rectifier bridge to pile up the realization, 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 end's output, full-bridge rectifier bridge pile's the 4 th foot do rectifier circuit's earthing terminal.
Compared with the prior art, the invention has the advantages that the unidirectional current-passing circuit, the filter circuit, the constant-current control circuit and the time-voltage conversion circuit are arranged, the rectifier circuit is connected with the intelligent dimming controller, and the intelligent dimming controller outputs the voltage of the alternating-current voltage of the mains supply after chopping treatment, wherein the voltage comprises zero voltage at the zero-voltage moment and non-zero voltage at the non-zero-voltage moment; the filter circuit has an energy storage function, after the dimmable LED lamp circuit is connected to mains supply through the intelligent dimming controller, the voltage at two ends of the filter circuit is always maintained to be more than half of the peak value of the mains supply alternating current voltage, and when the mains supply alternating current voltage passes through the intelligent dimming controller and the rectifying circuit and the output voltage of the rectifying circuit is smaller than the voltage at two ends of the filter circuit, the input current of the rectifying circuit is zero; when commercial power alternating voltage passes through intelligent dimming controller and rectifier circuit, and rectifier circuit's output voltage more than or equal to the voltage at filter circuit both ends, the one-way conduction circuit switches on, when charging for filter circuit, still provides operating voltage for constant current control circuit, and at this moment, rectifier circuit's input current is nonzero, can know from this that, in commercial power voltage's a change cycle, even the output of intelligent dimming controller keeps the on-state, its output has two output current states: when the absolute value of the input alternating voltage is larger than or equal to the voltage at two ends of the filter circuit, the output current is not zero, and when the absolute value of the input alternating voltage is smaller than the voltage at two ends of the filter circuit, the output current is zero, the intelligent dimming controller performs chopping control on the alternating voltage of the mains supply at the low-voltage moment when the output current is zero, and sends a control signal to the LED lamp circuit by controlling the chopping time; recording the maximum chopping time of the intelligent dimming controller as Tm, adjusting the chopping control time T of the intelligent dimming controller between 0 and Tm, and recording the sine wave period of the alternating-current voltage of the mains supply as 2T, wherein the chopped pulsating direct-current voltage output by the rectifying circuit is pulse voltage with the period of T, each period of the pulse voltage comprises zero voltage with the time of T and non-zero voltage with the time of T-T, a control voltage range for controlling the luminous intensity of the LED luminous circuit is arranged in the constant-current control circuit, the lower limit of the control voltage range is recorded as V1, and the upper limit of the control voltage range is recorded as V2; the time-voltage conversion circuit outputs a direct-current control voltage with corresponding magnitude according to the proportion of (T-T)/T of an accessed periodically-changed pulse voltage, the constant-current control circuit is accessed to the direct-current control voltage, when the direct-current control voltage is less than V1, the constant-current control circuit is cut off, the LED light-emitting circuit does not emit light, when the direct-current control voltage is more than or equal to V1 and less than or equal to V2, the constant-current control circuit is switched on, the output direct-current control LED light-emitting circuit emits light, the direct current increases to the maximum value along with the increase of the direct-current control voltage, the light-emitting intensity of the LED light-emitting circuit is enhanced along with the increase of the direct current, when the direct-current control voltage is more than V2, the direct current output by the constant-current control circuit keeps the maximum value, and the; therefore, the intelligent dimming controller is compatible with the intelligent dimming controller, and the intelligent dimming controller form an intelligent lighting system, so that the intelligent lighting system has important significance for improving the market competitiveness of the dimmable LED lamp and expanding the application prospect of the dimmable LED lamp.
Drawings
FIG. 1 is a block diagram of a conventional dimmable LED lamp circuit;
FIG. 2 is a block diagram of a dimmable LED lamp circuit according to the present invention;
fig. 3 is a circuit diagram of a dimmable LED lamp circuit of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
The first embodiment is as follows: as shown in fig. 2, a dimmable LED lamp circuit includes a rectifying circuit and an LED light emitting circuit, the dimmable LED lamp circuit further includes a unidirectional current path circuit, a filter circuit, a constant current control circuit and a time-voltage conversion circuit, the rectifying circuit is connected to an intelligent dimming controller, and the intelligent dimming controller outputs a voltage including a zero voltage at a zero voltage moment and a non-zero voltage at a non-zero voltage moment after chopping a mains supply ac voltage; the filter circuit has an energy storage function, after the dimmable LED lamp circuit is connected to mains supply through the intelligent dimming controller, the voltage at two ends of the filter circuit is always maintained to be more than half of the peak value of the mains supply alternating current voltage, and when the mains supply alternating current voltage passes through the intelligent dimming controller and the rectifying circuit and the output voltage of the rectifying circuit is smaller than the voltage at two ends of the filter circuit, the input current of the rectifying circuit is zero; when commercial power alternating voltage passes through intelligent dimming controller and rectifier circuit, and rectifier circuit's output voltage more than or equal to the voltage at filter circuit both ends, the one-way conduction circuit switches on, when charging for filter circuit, still provides operating voltage for constant current control circuit, and at this moment, rectifier circuit's input current is nonzero, can know from this that, in commercial power voltage's a change cycle, even the output of intelligent dimming controller keeps the on-state, its output has two output current states: when the absolute value of the input alternating voltage is larger than or equal to the voltage at two ends of the filter circuit, the output current is not zero, and when the absolute value of the input alternating voltage is smaller than the voltage at two ends of the filter circuit, the output current is zero, the intelligent dimming controller performs chopping control on the alternating voltage of the mains supply at the low-voltage moment when the output current is zero, and sends a control signal to the LED lamp circuit by controlling the chopping time; recording the maximum chopping time of the intelligent dimming controller as Tm, adjusting the chopping control time T of the intelligent dimming controller between 0 and Tm, and recording the sine wave period of the alternating-current voltage of the mains supply as 2T, wherein the chopped pulsating direct-current voltage output by the rectifying circuit is pulse voltage with the period of T, each period of the pulse voltage comprises zero voltage with the time of T and non-zero voltage with the time of T-T, a control voltage range for controlling the luminous intensity of the LED luminous circuit is arranged in the constant-current control circuit, the lower limit of the control voltage range is recorded as V1, and the upper limit of the control voltage range is recorded as V2; the time-voltage conversion circuit outputs a direct-current control voltage with corresponding magnitude according to the proportion of (T-T)/T of an accessed periodically-changed pulse voltage, the constant-current control circuit is accessed to the direct-current control voltage, when the direct-current control voltage is less than V1, the constant-current control circuit is cut off, the LED light-emitting circuit does not emit light, when the direct-current control voltage is more than or equal to V1 and less than or equal to V2, the constant-current control circuit is switched on, the output direct-current control circuit emits light, the direct current increases to the maximum value along with the increase of the direct-current control voltage, the light-emitting intensity of the LED light-emitting circuit is enhanced along with the increase of the direct current, when the direct-current control voltage is more than V2, the direct current output by the constant-current control circuit keeps the maximum value, and the light.
As shown in fig. 2, in the present embodiment, the rectifying circuit has a live wire input terminal, a zero line input terminal, an output terminal and a ground terminal, the unidirectional current circuit has a positive electrode and a negative electrode, the filtering circuit has a positive electrode and a negative electrode, the LED light-emitting circuit has a positive electrode and a negative electrode, the constant current control circuit has an input terminal, an output terminal, a control terminal and a ground terminal, the time-voltage conversion circuit has a positive electrode, an input terminal, an output terminal and a ground terminal, the output terminal of the rectifying circuit, the input terminal of the time-voltage conversion circuit and the positive electrode of the unidirectional current circuit are connected, the negative electrode of the unidirectional current circuit, the positive electrode of the filtering circuit, the input terminal of the constant current control circuit, the positive electrode of the time-voltage conversion circuit and the positive electrode of the LED light-emitting circuit are connected, the output terminal of the constant, the grounding end of the rectifying circuit, the grounding end of the time-voltage conversion circuit and the negative electrode of the filter circuit are connected with the grounding end of the constant current control circuit.
Example two: this embodiment is substantially the same as the first embodiment, except that:
as shown in fig. 3, in the present embodiment, the time-voltage conversion circuit includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2, a third diode D3 and a first transistor Q1, the first capacitor C1 is an electrolytic capacitor, the second diode D2 is a zener diode, the first transistor Q1 is a PNP-type transistor, the first diode D1 and the third diode D3 are rectifier diodes, one end of the first resistor R695r 2 is an input end of the time-voltage conversion circuit, the other end of the first resistor R1, one end of the second resistor R2, an anode of the first diode D1 and a base of the first transistor Q1 are connected, one end of the third resistor R3 is an anode of the time-voltage conversion circuit, and the other end of the first resistor R3 and one end of the fourth resistor R4, The cathode of the first diode D1 is connected with the cathode of the second diode D2, the other end of the fourth resistor R4 and one end of the fifth resistor R5 are connected with the emitter of the first triode Q1, the other end of the fifth resistor R5 and the anode of the first capacitor C1 are connected with the anode of the third diode D3, the cathode of the third diode D3 and one end of the second capacitor C2 are connected with one end of the sixth resistor R6, the connection end of the connection ends is the output end of the time-voltage conversion circuit, the other end of the second resistor R2, the collector of the first triode Q1, the cathode of the first capacitor C1, the other end of the second capacitor C2 and the other end of the sixth resistor R6 are connected, and the connection end of the connection end is the ground end of the time-voltage conversion circuit.
As shown in fig. 3, in this embodiment, the constant current control circuit includes a first chip U1 with a model MT7816, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a third capacitor C3, a fourth diode D4, a fourth capacitor C4, and a first inductor L1, the fourth diode D4 is a fast recovery rectifier diode, the fourth capacitor C4 is an electrolytic capacitor, one end of the seventh resistor R7, the negative electrode of the fourth diode D4, and the positive electrode of the fourth capacitor C4 are connected, and the connection end thereof is the input end of the constant current control circuit, the other end of the seventh resistor R7, one end of the third capacitor C3, and the 4 th pin of the first chip U1, the 2 nd pin of the first chip U1 is the control end of the control circuit, the 3 rd pin of the first chip U1 is connected to one end of the eighth resistor R8, the first pin 8 of the first chip U1 is connected to the first end R2 nd pin of the ninth resistor R6356, and the positive ends of the first inductor L8653, the fourth pin 828653 and the fourth pin 8653, the other end of the first inductor L1 is connected to the negative electrode of the fourth capacitor C4, and the connection end of the first inductor L1 is the output end of the constant current control circuit, the other end of the third capacitor C3, the other end of the eighth resistor R8, and the other end of the ninth resistor R9 are connected to the 1 st pin of the first chip U1, and the connection end of the first inductor L1 is the ground end of the constant current control circuit.
As shown in fig. 3, in the present embodiment, the unidirectional current-carrying circuit includes a fifth diode D5, the fifth diode D5 is a fast recovery rectifier diode, the anode of the fifth diode D5 is the anode of the unidirectional current-carrying circuit, and the cathode of the fifth diode D5 is the cathode of the unidirectional current-carrying circuit.
As shown in fig. 3, in the present embodiment, the filter circuit includes a fifth capacitor C5, the fifth capacitor C5 is an electrolytic capacitor, the positive electrode of the fifth capacitor C5 is the positive electrode of the filter circuit, and the negative electrode of the fifth capacitor C5 is the negative electrode of the filter circuit.
As shown in fig. 3, in this embodiment, the rectifying circuit is implemented by using a full-bridge rectifier Db, the 1 st pin of the full-bridge rectifier Db is the live wire input end of the rectifying circuit, the 3 rd pin of the full-bridge rectifier Db is the zero line input end of the rectifying circuit, the 2 nd pin of the full-bridge rectifier Db is the output end of the rectifying circuit, and the 4 th pin of the full-bridge rectifier Db is the ground end of the rectifying circuit.

Claims (7)

1. A dimmable LED lamp circuit comprises a rectifying circuit and an LED light-emitting circuit, and is characterized in that the dimmable LED lamp circuit further comprises a one-way current circuit, a filter circuit, a constant current control circuit and a time-voltage conversion circuit, wherein the rectifying circuit is connected with an intelligent dimming controller, and the voltage output by chopping alternating-current voltage of a mains supply by the intelligent dimming controller comprises zero voltage at the time of zero voltage and non-zero voltage at the time of non-zero voltage; the filter circuit has an energy storage function, after the dimmable LED lamp circuit is connected to mains supply through the intelligent dimming controller, the voltage at two ends of the filter circuit is always maintained at more than half of the peak value of the mains supply alternating current voltage, and when the mains supply alternating current voltage passes through the intelligent dimming controller and the rectifying circuit, and the output voltage of the rectifying circuit is smaller than the voltage at two ends of the filter circuit, the input current of the rectifying circuit is zero; when the alternating-current voltage of the mains supply passes through the intelligent dimming controller and the rectifying circuit, and the output voltage of the rectifying circuit is more than or equal to the voltages at the two ends of the filter circuit, the one-way conduction circuit is conducted to charge the filter circuit and provide working voltage for the constant-current control circuit, at the moment, the input current of the rectifying circuit is not zero, so that the output end of the intelligent dimming controller has two output current states even if the output end of the intelligent dimming controller is kept in a conduction state in a variation cycle of the mains supply voltage: when the absolute value of the input alternating voltage is larger than or equal to the voltage at the two ends of the filter circuit, the output current is not zero, and when the absolute value of the input alternating voltage is smaller than the voltage at the two ends of the filter circuit, the output current is zero, the intelligent dimming controller performs chopping control on the alternating voltage of the mains supply at the low-voltage moment when the output current is zero, and sends a control signal to the LED lamp circuit by controlling the chopping time;
recording the maximum chopping time of the intelligent dimming controller as Tm, adjusting the chopping control time T of the intelligent dimming controller between 0 and Tm, and recording the sine wave period of the alternating-current voltage of the commercial power as 2T, wherein the chopped pulsating direct-current voltage output by the rectifying circuit is pulse voltage with the period of T, each period of the pulse voltage comprises zero voltage with the time of T and non-zero voltage with the time of T-T, a control voltage range for controlling the luminous intensity of the LED luminous circuit is arranged in the constant-current control circuit, the lower limit of the control voltage range is recorded as V1, and the upper limit of the control voltage range is recorded as V2; the time-voltage conversion circuit outputs a direct-current control voltage with corresponding magnitude according to the proportion of (T-T)/T of an accessed periodically-changed pulse voltage, the constant-current control circuit is accessed to the direct-current control voltage, when the direct-current control voltage is less than V1, the constant-current control circuit is cut off, the LED light-emitting circuit does not emit light, when the direct-current control voltage is more than or equal to V1 and less than or equal to V2, the constant-current control circuit is switched on, outputs direct current to control the LED light-emitting circuit to emit light, the direct current increases to the maximum value along with the increase of the direct-current control voltage, the light-emitting intensity of the LED light-emitting circuit is enhanced along with the increase of the direct current, when the direct-current control voltage is more than V2, the direct current output by the constant-current control circuit keeps the maximum value unchanged, the LED light-emitting circuit has the maximum light-emitting intensity.
2. A dimmable LED lamp circuit according to claim 1, wherein said rectifying circuit has a live input, a neutral input, an output and a ground, said unidirectional current path has a positive and a negative, said filter circuit has a positive and a negative, said LED light circuit has a positive and a negative, said constant current control circuit has an input, an output, a control and a ground, said time-voltage conversion circuit has a positive, an input, an output and a ground, said rectifying circuit output, said time-voltage conversion circuit input and said unidirectional current path positive are connected, said unidirectional current path negative, said filter circuit positive, said constant current control circuit input, said time-voltage conversion circuit positive and said LED light circuit positive are connected, the output end of the constant current control circuit is connected with the negative electrode of the LED light-emitting circuit, the output end of the time-voltage conversion circuit is connected with the control end of the constant current control circuit, and the grounding end of the rectifying circuit, the grounding end of the time-voltage conversion circuit and the negative electrode of the filter circuit are connected with the grounding end of the constant current control circuit.
3. The dimmable LED lamp circuit according to claim 2, wherein the time-to-voltage conversion circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a first capacitor, a second capacitor, a first diode, a second diode, a third diode, and a first transistor, the first capacitor is an electrolytic capacitor, the second diode is a zener diode, the first transistor is a PNP transistor, the first diode and the third diode are rectifier diodes, one end of the first resistor is the input end of the time-to-voltage conversion circuit, the other end of the first resistor, one end of the second resistor, the anode of the first diode, and the base of the first transistor are connected, one end of the third resistor is the anode of the time-to-voltage conversion circuit, the other end of the third resistor, one end of the fourth resistor, the cathode of the first diode and the cathode of the second diode are connected, the other end of the fourth resistor and one end of the fifth resistor are connected with the emitter of the first triode, the other end of the fifth resistor, the anode of the first capacitor and the anode of the third diode are connected, the cathode of the third diode, one end of the second capacitor and one end of the sixth resistor are connected, and the connection end of the third diode and one end of the second capacitor is the output end of the time-voltage conversion circuit, the other end of the second resistor, the collector of the first triode, the cathode of the first capacitor, the other end of the second capacitor and the other end of the sixth resistor are connected, and the connecting end of the second capacitor and the other end of the sixth resistor is the grounding end of the time-voltage conversion circuit.
4. The dimmable LED lamp circuit according to claim 2, wherein the constant current control circuit comprises a first chip of type MT7816, a seventh resistor, an eighth resistor, a ninth resistor, a third capacitor, a fourth diode, a fourth capacitor and a first inductor, the fourth diode is a fast recovery rectifier diode, the fourth capacitor is an electrolytic capacitor, one end of the seventh resistor, a cathode of the fourth diode and an anode of the fourth capacitor are connected, a connection end of the seventh resistor and the cathode of the fourth diode is connected to the input end of the constant current control circuit, the other end of the seventh resistor, one end of the third capacitor and a pin 4 of the first chip are connected, a pin 2 of the first chip is a control end of the constant current control circuit, a pin 3 of the first chip is connected to one end of the eighth resistor, the 8 th pin of the first chip is connected with one end of the ninth resistor, the 5 th pin and the 6 th pin of the first chip and the anode of the fourth diode are connected with one end of the first inductor, the other end of the first inductor is connected with the cathode of the fourth capacitor, the connecting end of the first inductor is the output end of the constant current control circuit, the other end of the third capacitor, the other end of the eighth resistor and the other end of the ninth resistor are connected with the 1 st pin of the first chip, and the connecting end of the third inductor is the grounding end of the constant current control circuit.
5. The dimmable LED lamp circuit of claim 2, wherein the unidirectional current path comprises a fifth diode, the fifth diode is a fast recovery rectifier diode, an anode of the fifth diode is an anode of the unidirectional current path, and a cathode of the fifth diode is a cathode of the unidirectional current path.
6. The dimmable LED lamp circuit according to claim 2, wherein the filter circuit comprises a fifth capacitor, the fifth capacitor is an electrolytic capacitor, an anode of the fifth capacitor is an anode of the filter circuit, and a cathode of the fifth capacitor is a cathode of the filter circuit.
7. A dimmable LED lamp circuit according to claim 2, wherein said rectifying circuit is implemented by a full-bridge rectifier bridge stack, the 1 st pin of said full-bridge rectifier bridge stack is the live wire input terminal of said rectifying circuit, the 3 rd pin of said full-bridge rectifier bridge stack is the zero wire input terminal of said rectifying circuit, the 2 nd pin of said full-bridge rectifier bridge stack is the output terminal of said rectifying circuit, and the 4 th pin of said full-bridge rectifier bridge stack is the ground terminal of said rectifying circuit.
CN201910436947.XA 2019-05-23 2019-05-23 Light-adjustable LED lamp circuit Active CN110312339B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201910436947.XA CN110312339B (en) 2019-05-23 2019-05-23 Light-adjustable LED lamp circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201910436947.XA CN110312339B (en) 2019-05-23 2019-05-23 Light-adjustable LED lamp circuit

Publications (2)

Publication Number Publication Date
CN110312339A CN110312339A (en) 2019-10-08
CN110312339B true CN110312339B (en) 2021-04-20

Family

ID=68075017

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201910436947.XA Active CN110312339B (en) 2019-05-23 2019-05-23 Light-adjustable LED lamp circuit

Country Status (1)

Country Link
CN (1) CN110312339B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102300356A (en) * 2010-06-22 2011-12-28 英飞特电子（杭州）有限公司 Light source control method, device and system
WO2013075503A1 (en) * 2011-11-23 2013-05-30 英飞特电子（杭州）股份有限公司 Pfc circuit, load drive circuit and current control method
CN106507544A (en) * 2016-12-21 2017-03-15 广东南能汇智节能科技有限公司 A kind of LED lamplight brightness adjusting method and device
CN107027220A (en) * 2017-05-05 2017-08-08 电子科技大学 A kind of Dimmable LED drive circuit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8614552B2 (en) * 2012-01-06 2013-12-24 Lumenpulse Lighting, Inc. Detection of the position of an ELV dimmer for controlling operation of an isolated electrical load

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102300356A (en) * 2010-06-22 2011-12-28 英飞特电子（杭州）有限公司 Light source control method, device and system
WO2013075503A1 (en) * 2011-11-23 2013-05-30 英飞特电子（杭州）股份有限公司 Pfc circuit, load drive circuit and current control method
CN103138555A (en) * 2011-11-23 2013-06-05 英飞特电子（杭州）股份有限公司 Power factor correction (PFC) circuit, load driving circuit and current control method
CN106507544A (en) * 2016-12-21 2017-03-15 广东南能汇智节能科技有限公司 A kind of LED lamplight brightness adjusting method and device
CN107027220A (en) * 2017-05-05 2017-08-08 电子科技大学 A kind of Dimmable LED drive circuit

Also Published As

Publication number Publication date
CN110312339A (en) 2019-10-08

Similar Documents

Publication Publication Date Title
CN101657057B (en) LED power circuit
CN102711307B (en) Dimmable light-emitting diode (LED) drive circuit and lamp
CN103312308B (en) A kind of thyristor triggering device and method
CN201663735U (en) LED power supply
CN104703358B (en) Wide-voltage-range LED (light emitting diode) lamp switching and dimming driving circuit and LED lamp dimming control system
CN201813599U (en) LED (Light-Emitting Diode) dimmer power
CN109769321B (en) LED lamp circuit with delayed light-off function
CN102752929A (en) High-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming
CN101437342A (en) Low energy consumption monopole electronic switching circuit and micro energy consumption brightening circuit of indicating lamp
CN102014557A (en) LED dimming power supply
CN201550315U (en) LED driving circuit
CN201805579U (en) Dimming control circuit suitable for leading edge dimmer and/or trailing edge dimmer of LED
CN101795519A (en) Dimming control circuit suitable for front-edge and/or rear-edge dimmer of light emitting diode (LED)
CN204518177U (en) A kind of LED drive power circuit
CN201528447U (en) LED driving power supply circuit
CN201467538U (en) LED driving circuit for controlled silicon dimming
CN201345755Y (en) LED dimming device capable of being applied to silicon-controlled dimmer
CN110312339B (en) Light-adjustable LED lamp circuit
CN204539556U (en) The switch dimming drive circuit of Width funtion LED and LED dimming control system
CN110446295B (en) Remote-controlled dimmer circuit
CN212344104U (en) LED fluorescent tube based on silicon controlled rectifier adjusts luminance
CN210579370U (en) LED table lamp control circuit
CN201509348U (en) LED power circuit
CN208434144U (en) LED drive circuit and lamps and lanterns including the LED drive circuit
CN210381400U (en) Dimmable linear LED lamp circuit

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant