CN212367572U - LED synchronous control circuit and LED lamp - Google Patents
LED synchronous control circuit and LED lamp Download PDFInfo
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- CN212367572U CN212367572U CN202021585510.7U CN202021585510U CN212367572U CN 212367572 U CN212367572 U CN 212367572U CN 202021585510 U CN202021585510 U CN 202021585510U CN 212367572 U CN212367572 U CN 212367572U
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Abstract
The utility model is suitable for a lamps and lanterns control technical field provides a LED synchronous control circuit and LED lamps and lanterns, and LED synchronous control circuit includes: the power supply detection module, the switch module and the first resistor; the power supply detection module is connected with the power supply module at the input end and connected with the control end of the switch module at the output end, and is used for detecting a power supply signal of the power supply module and sending the detected power supply signal to the control end of the switch module; the switch module and the first resistor are connected in series between the anode and the cathode of the white light string of the white light emitting circuit. When the power supply detection module detects that the power supply is powered off, the control switch module is turned on, and the anode of the white light string of the white light emitting circuit discharges rapidly through the first resistor, so that the white light is extinguished rapidly, and the white light is prevented from flashing.
Description
Technical Field
The utility model belongs to the technical field of lamps and lanterns control, especially, relate to a LED synchronous control circuit and LED lamps and lanterns.
Background
An LED (Light Emitting Diode) Light source and the advantages of high efficiency, energy saving, environmental protection, long service life, strong controllability and the like are widely used. The LED color lamps generally comprise a white light emitting circuit and a color lamp emitting circuit, and the white light emitting circuit and the color lamp emitting circuit operate independently.
In the prior art, when the power supply of the LED colored lamp is turned off, white light and colored light cannot be turned off simultaneously, so that the white light is flashed, the visual effect is influenced, and the user experience is not good enough.
SUMMERY OF THE UTILITY MODEL
In view of this, the embodiment of the utility model provides a LED synchronous control circuit and LED lamps and lanterns to white light and the problem that the glory can not be shut off simultaneously when solving among the prior art LED color lamp and shutting off.
The utility model provides a first aspect of the embodiment provides a LED synchronous control circuit for control LED lamps and lanterns, LED lamps and lanterns include: the LED lamp comprises a power supply module, a white light emitting circuit and a color light emitting circuit; the power supply module is respectively connected with the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit;
the LED synchronous control circuit comprises: the power supply detection module, the switch module and the first resistor;
the power supply detection module is connected with the power supply module at the input end and connected with the control end of the switch module at the output end, and is used for detecting a power supply signal of the power supply module and sending the detected power supply signal to the control end of the switch module;
the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit through a first resistor, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit; or the like, or, alternatively,
and the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit through the first resistor.
A second aspect of the embodiments of the present invention provides an LED lamp, which includes a power module, a white light emitting circuit, a color light emitting circuit, a main control module, and an LED synchronous control circuit as provided in the first aspect of the embodiments of the present invention;
the power supply module is respectively connected with the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit;
the main control module is respectively connected with the control end of the white light emitting circuit and the control end of the color light emitting circuit.
The embodiment of the utility model provides a LED synchronous control circuit includes: the power supply detection module, the switch module and the first resistor; the power supply detection module is connected with the power supply module at the input end and connected with the control end of the switch module at the output end, and is used for detecting a power supply signal of the power supply module and sending the detected power supply signal to the control end of the switch module; the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit through a first resistor, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit; or the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit through the first resistor. When the power detection module detects the power failure of the power supply, the control switch module is turned on, and the white light string of the white light emitting circuit discharges rapidly through the first resistor, so that the white light is extinguished rapidly, the light cannot be flashed, and the visual effect is good.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic circuit structure diagram of an LED synchronous control circuit according to an embodiment of the present invention;
fig. 2 is a schematic circuit diagram of a power module, a white light emitting circuit and a power detection module provided in an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a switch module according to an embodiment of the present invention;
fig. 4 is a schematic circuit structure diagram of an LED lamp provided in an embodiment of the present invention;
fig. 5 is a schematic circuit diagram of a standby module according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram of a first voltage reduction unit according to an embodiment of the present invention;
fig. 7 is a schematic circuit diagram of a second voltage reduction unit according to an embodiment of the present invention;
fig. 8 is a schematic circuit diagram of a color light emitting circuit according to an embodiment of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.
In order to explain the technical means of the present invention, the following description will be given by way of specific examples.
Referring to fig. 1, an embodiment of the present invention provides a LED synchronous control circuit for controlling a LED lamp, the LED lamp includes: a power supply module 11, a white light emitting circuit 12 and a color light emitting circuit 13; the power supply module 11 is respectively connected with the power supply end of the white light emitting circuit 12 and the power supply end of the color light emitting circuit 13;
the LED synchronous control circuit comprises: the power detection module 14, the switch module 15 and the first resistor Rt 1;
the power supply detection module 14 is connected with the power supply module 11 at an input end, and connected with the control end of the switch module 15 at an output end, and is used for detecting the power supply of the power supply module 11 and sending a detected power supply signal to the control end of the switch module 15;
a first end of the switch module 15 is connected with an anode of a white light string W1 of the white light emitting circuit 12 through a first resistor Rt1, and a second end of the switch module is connected with a cathode of a white light string W1 of the white light emitting circuit 12; or the like, or, alternatively,
the first end of the switch module 15 is connected to the anode of the white light string W1 of the white light emitting circuit 12, and the second end is connected to the cathode of the white light string W1 of the white light emitting circuit 12 through the first resistor Rt 1.
Since the control signals of the white light emitting circuit 12 and the color light emitting circuit 13 cannot be strictly synchronized, the color light may be extinguished before the white light; or because the two ends of the white light string W1 in the white light emitting circuit 12 are connected in parallel with the electrolytic capacitors, when the power supply of the power module 11 is cut off, the electrolytic capacitors discharge, so that the white light is extinguished in a delayed manner, and the visual effect is poor because the white light flashes after the visual perception is a colored light. The embodiment of the utility model provides a LED synchronous control circuit, power detection module 14 detect power module 11's power supply, and when detecting the mains operated disconnection, control switch module 15 switches on, and white light lamp string W1's positive pole discharges rapidly through first resistance Rt1, ensures that white light lamp string W1 can extinguish fast, can not appear white light flashing, and visual effect is good. When the power detection module 14 detects that the power supply of the power supply is normal, the switch module 15 is turned off, and the light emitting of the white light string W1 is not affected.
In some embodiments, referring to fig. 2, the power detection module 14 may include: the voltage stabilizing diode D6, the second resistor R13, the third resistor R14, the twenty-fifth resistor, the first capacitor C7 and the inverter;
the anode of the voltage stabilizing diode D6 is grounded, and the cathode of the voltage stabilizing diode D6 is connected with the first end of the twenty-fifth resistor and the first end of the second resistor R13 respectively;
an input end of the inverter is connected with the second end of the second resistor R13, the first end of the third resistor R14 and the first end of the first capacitor C7, and an output end of the inverter is connected with the output end of the power detection module 14;
the second end of the twenty-fifth resistor is connected with the input end of the power supply detection module 14;
the second terminal of the first capacitor C7 and the second terminal of the third resistor R14 are both grounded.
When the power supply of the power supply module 11 is cut off, the input end of the power supply detection module 14 detects a low level, the input end of the phase inverter is a low level, the power supply detection module 14 outputs a high level to control the switch module 15 to be switched on, and the white light emitting circuit 12 discharges electricity; when the power module 11 supplies power normally, the input terminal of the power detection module 14 is at a high level, the second resistor R13 and the third resistor R14 output a high level after voltage division, and output a low level after phase inversion to control the switch module 15 to be turned off.
In some embodiments, referring to fig. 3, the switch module 15 may include: the circuit comprises an optical coupler U2, a first switching tube Q3, a second switching tube TL1, a fourth resistor Ro1, a fifth resistor Rs1 and a sixth resistor R11;
a first input end of the optocoupler U2 is connected with a first power supply end through a fourth resistor Ro1, a second input end of the optocoupler U2 is connected with a first end of a first switch tube Q3, a first output end of the optocoupler U2 is connected with an anode of a white light string W1 of the white light emitting circuit 12, and a second output end of the optocoupler U2 is respectively connected with a first end of a sixth resistor R11 and a control end of a second switch tube TL 1;
a first switch tube Q3, a control end of which is respectively connected with the control end of the switch module 15 and the first end of the fifth resistor Rs1, and a second end of which is grounded;
a second switching tube TL1, having a first end connected to the first end of the switch module 15 and a second end connected to the second end of the switch module 15;
the second terminal of the fifth resistor Rs1 and the second terminal of the sixth resistor R11 are both grounded.
The embodiment of the utility model provides an in switch module 15 adopts first switch tube Q3 control opto-coupler U2, thereby realize switching on between white light lamp cluster W1 positive pole and the negative pole at the break-make through opto-coupler U2 control second switch tube TL1, through opto-coupler U2 isolation control, fast, the interference killing feature is strong.
In some embodiments, the first switch transistor Q3 may be an NMOS transistor.
In some embodiments, the second switch TL1 may be a triac;
and the anode of the unidirectional thyristor is connected with the first end of the second switch tube TL1, the cathode of the unidirectional thyristor is connected with the second end of the second switch tube TL1, and the control electrode of the unidirectional thyristor is connected with the control end of the second switch tube TL 1.
Corresponding to above-mentioned LED synchronous control circuit, refer to fig. 4, the embodiment of the utility model provides a LED lamps and lanterns is still provided, include: a power module 11, a white light emitting circuit 12, a color light emitting circuit 13, a main control module 16 and any one of the LED synchronous control circuits provided in the above embodiments of the present invention;
the power supply module 11 is respectively connected with the power supply end of the white light emitting circuit 12 and the power supply end of the color light emitting circuit 13;
the main control module 16 is connected to the control end of the white light emitting circuit 12 and the control end of the color light emitting circuit 13, respectively.
In some embodiments, referring to fig. 5, the LED light fixture may further comprise: a standby module 17;
the standby module 17 includes: a third switching tube Q1, a fourth switching tube Q2, a seventh resistor R5, an eighth resistor R10 and a ninth resistor R12;
a first end of the fourth switching tube Q2 is connected to the second end of the seventh resistor R5 and the control end of the third switching tube Q1 through the eighth resistor R10, respectively, a second end of the fourth switching tube Q2 is grounded, and the control ends are connected to the main control module 16 and the first end of the ninth resistor R12, respectively;
a third switch tube Q1, a first end of which is connected to the power supply end of the color light emitting circuit 13, and a second end of which is connected to the power module 11 and the first end of the seventh resistor R5, respectively;
the second terminal of the ninth resistor R12 is connected to ground.
When the color light emitting circuit 13 is in standby, the main control module 16 controls the third switching tube Q1 to turn off through the fourth switching tube Q2, so as to cut off the power supply of the color light emitting circuit 13 and reduce the power consumption.
In some embodiments, the power module 11 includes: a rectifying unit 111, a filtering unit 112, a first voltage-reducing unit 113, and a second voltage-reducing unit 114;
the input end of the rectifying unit 111 is connected with the mains supply, and the output end of the rectifying unit is connected with the input end of the filtering unit 112;
a first voltage-reducing unit 113, an input end of which is connected to the output end of the filtering unit 112, and an output end of which is connected to the input end of the second voltage-reducing unit 114;
the output end of the rectifying unit 111 is also connected with the input end of the power detection module 14; the output end of the filtering unit 112 is further connected to the power supply end of the white light emitting circuit 12; the output end of the first voltage-reducing unit 113 is also connected with the power supply end of the color light-emitting circuit 13; the output terminal of the second voltage-decreasing unit 114 is connected to the first power supply terminal.
In some embodiments, referring to fig. 2, the rectifying unit 111 includes: a rectifier bridge BD1 and a ninth capacitor C5;
two input ends of the rectifier bridge BD1 are respectively connected with a mains supply zero line and a mains supply live wire in a one-to-one correspondence manner, a first output end of the rectifier bridge BD1 is connected with a first end of a ninth capacitor C5 and an output end of the rectifier unit 111, and a second output end of the rectifier bridge BD1 is grounded;
the second terminal of the ninth capacitor C5 is connected to ground.
In some embodiments, the power module 11 may further include: a protection unit 115;
the protection unit 115 includes: current limiting protection element F1 and piezoresistor RV 1.
The first end of the current-limiting protection element F1 is connected with the live line of the commercial power, the second end of the current-limiting protection element F1 is connected with the first end of the piezoresistor RV1, and the second end of the piezoresistor RV1 is connected with the neutral line of the commercial power. The first end of the piezoresistor RV1 and the second end of the piezoresistor RV1 are respectively connected with the input end of the rectifying unit 111.
The above elements constitute a protection unit 115, which can be used to protect the circuit from high voltage surges.
The circuit schematic diagram of the filtering unit 112 refers to fig. 2, the circuit schematic diagram of the first voltage-reducing unit 113 refers to fig. 6, and the circuit schematic diagram of the second voltage-reducing unit 114 refers to fig. 7, which are not repeated herein.
In some embodiments, the output terminal of the second voltage-reducing unit 114 is further connected to the power supply terminal of the main control module 16.
In some embodiments, the voltage of the output terminal of the first voltage-reducing unit 113 may be +27V, and the voltage of the output terminal of the second voltage-reducing unit 114 may be + 3.3V.
In some embodiments, referring to fig. 2, the white light emitting circuit 12 includes: the LED white light emitting diode comprises a white light string W1, a constant current driving chip U1, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a second capacitor CD1, a third capacitor CD3, a fourth capacitor C6, a fifth capacitor C1, a sixth capacitor C4, a seventh capacitor CD2, a tenth resistor R4, an eleventh resistor R6, a twelfth resistor R3, a thirteenth resistor R1, a fourteenth resistor R8, a fifteenth resistor R9 and an inductor L2;
a power supply terminal HV (pin 4) of the constant current driving chip U1 is respectively connected with the power supply terminal of the white light emitting circuit 12, the cathode of the first diode D1, the first terminal of the second capacitor CD1, the first terminal of the twelfth resistor R3 and the cathode of the second diode D2, a first end of a thirteenth resistor R1, a first end of a seventh capacitor CD2, and an anode of the white light string W1 are connected, an overvoltage detection terminal OVP (pin 1) is grounded through a tenth resistor R4, a dimming control input terminal PWM (pin 7) is respectively connected to a control terminal of the white light emitting circuit 12, a first end of a fourth capacitor C6, and a first end of an eleventh resistor R6, a ground terminal GND (pin 2) is grounded, an output terminal DRAN (pin 8) is respectively connected to a second terminal of a fifth capacitor C1, an anode of a second diode D2, and a first end of an inductor L2, a current sampling terminal CS (pin 5) is grounded through a fourteenth resistor R8, and the current sampling terminal CS (pin 5) is also grounded through a fifteenth resistor R9;
a second end of the second capacitor CD1 is connected to the cathode of the fourth diode D4 and the anode of the third diode D3, respectively;
the cathode of the third diode D3 is connected to the anode of the first diode D1 and the first end of the third capacitor CD3, respectively;
a second end of the twelfth resistor R3 is connected with a first end of the fifth capacitor C1;
the second end of the inductor L2 is connected to the second end of the thirteenth resistor R1, the first end of the sixth capacitor C4, the second end of the seventh capacitor CD2 and the cathode of the white light string W1, respectively;
the second terminal of the eleventh resistor R6, the second terminal of the fourth capacitor C6, the second terminal of the sixth capacitor C4, the second terminal of the third capacitor CD3, and the anode of the fourth diode D4 are all grounded.
In some embodiments, the signal sent by the main control module 16 to the white light emitting circuit 12 is a PWM signal.
In some embodiments, referring to fig. 8, the color light emitting circuit 13 may include: the multi-channel dimming control circuit comprises a multi-channel dimming control chip U4, an eighth capacitor C10, a sixteenth resistor R15, a seventeenth resistor R17, an eighteenth resistor R18, a nineteenth resistor R120, a twentieth resistor R23, a twenty-first resistor R22, a twenty-second resistor R26, a twenty-third resistor R27, a twenty-fourth resistor R28, a red light string, a green light string and a blue light string;
the multi-channel dimming control chip U4 is characterized IN that a power supply end VIN (pin 1) is connected with a power supply end of the color light emitting circuit 13 through a sixteenth resistor R15, a first dimming input end DIM3 (pin 2) is connected with the main control module 16 through a seventeenth resistor R17, the first dimming input end DIM3 (pin 2) is further grounded through an eighteenth resistor R18, a second dimming input end DIM 62 (pin 3) is connected with the main control module 16 through a nineteenth resistor R120, the second dimming input end DIM2 (pin 3) is further grounded through a twentieth resistor R23, a third dimming input end DIM1 (pin 4) is connected with the main control module 16 through a twenty-first resistor R22, a third dimming input end DIM1 (pin 4) is further grounded through a twelfth resistor R26, a current setting end R _ IN (pin 5) is grounded through a thirteenth resistor R27, a current setting end R _ IN (pin 5) is further grounded through a fourteenth resistor R28, and a first pin 898 is output end OUT 36, The second output end OUT2 (pin 7) and the third output end OUT1 (pin 6) are respectively connected with the red light string, the green light string and the blue light string in a one-to-one correspondence manner;
and a first end of the eighth capacitor C10 is connected with a power supply terminal VIN (pin 1) of the multi-channel dimming control chip U4, and a second end is grounded.
In some embodiments, the inverter in the power detection module 14 may be disposed in the main control module 16, and the main control module 16 may invert the voltage at the second terminal of the second resistor R13, convert a high level into a low level, or convert a low level into a high level.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. An LED synchronous control circuit, which is used for controlling an LED lamp, wherein the LED lamp comprises: the LED lamp comprises a power supply module, a white light emitting circuit and a color light emitting circuit; the power supply module is respectively connected with the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit;
the LED synchronous control circuit comprises: the power supply detection module, the switch module and the first resistor;
the input end of the power supply detection module is connected with the power supply module, and the output end of the power supply detection module is connected with the control end of the switch module, and is used for detecting a power supply signal of the power supply module and sending the detected power supply signal to the control end of the switch module;
the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit through the first resistor, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit; or the like, or, alternatively,
the first end of the switch module is connected with the anode of the white light string of the white light emitting circuit, and the second end of the switch module is connected with the cathode of the white light string of the white light emitting circuit through the first resistor.
2. The LED synchronous control circuit of claim 1, wherein the power detection module comprises: the circuit comprises a voltage stabilizing diode, a second resistor, a third resistor, a twenty-fifth resistor, a first capacitor and a phase inverter;
the anode of the voltage stabilizing diode is grounded, and the cathode of the voltage stabilizing diode is respectively connected with the first end of the twenty-fifth resistor and the first end of the second resistor;
the input end of the phase inverter is respectively connected with the second end of the second resistor, the first end of the third resistor and the first end of the first capacitor, and the output end of the phase inverter is connected with the output end of the power supply detection module;
a second end of the twenty-fifth resistor is connected with the input end of the power supply detection module;
the second end of the first capacitor and the second end of the third resistor are both grounded.
3. The LED synchronous control circuit of claim 1 or 2, wherein the switching module comprises: the circuit comprises an optical coupler, a first switch tube, a second switch tube, a fourth resistor, a fifth resistor and a sixth resistor;
a first input end of the optical coupler is connected with a first power supply end through the fourth resistor, a second input end of the optical coupler is connected with a first end of the first switch tube, a first output end of the optical coupler is connected with an anode of a white light string of the white light emitting circuit, and a second output end of the optical coupler is respectively connected with a first end of the sixth resistor and a control end of the second switch tube;
the control end of the first switch tube is respectively connected with the control end of the switch module and the first end of the fifth resistor, and the second end of the first switch tube is grounded;
the first end of the second switch tube is connected with the first end of the switch module, and the second end of the second switch tube is connected with the second end of the switch module;
and the second end of the fifth resistor and the second end of the sixth resistor are both grounded.
4. The LED synchronous control circuit according to claim 3, wherein the first switch tube is an NMOS tube.
5. The LED synchronous control circuit according to claim 3, wherein the second switching tube is a one-way thyristor;
the positive pole of the unidirectional silicon controlled rectifier is connected with the first end of the second switch tube, the negative pole of the unidirectional silicon controlled rectifier is connected with the second end of the second switch tube, and the control pole of the unidirectional silicon controlled rectifier is connected with the control end of the second switch tube.
6. An LED lamp, which is characterized by comprising a power supply module, a white light emitting circuit, a color light emitting circuit, a main control module and the LED synchronous control circuit of any one of claims 1 to 5;
the power supply module is respectively connected with the power supply end of the white light emitting circuit and the power supply end of the color light emitting circuit;
the main control module is respectively connected with the control end of the white light emitting circuit and the control end of the color light emitting circuit.
7. The LED light fixture of claim 6 further comprising: a standby module;
the standby module includes: the third switch tube, the fourth switch tube, the seventh resistor, the eighth resistor and the ninth resistor;
a first end of the fourth switching tube is connected with a second end of the seventh resistor and a control end of the third switching tube through the eighth resistor respectively, the second end of the fourth switching tube is grounded, and the control ends of the fourth switching tube and the ninth switching tube are connected with the main control module and the first end of the ninth resistor respectively;
a first end of the third switch tube is connected with a power supply end of the color light emitting circuit, and a second end of the third switch tube is respectively connected with the power supply module and a first end of the seventh resistor;
and the second end of the ninth resistor is grounded.
8. The LED light fixture of claim 6 wherein the power module comprises: the filter comprises a rectifying unit, a filtering unit, a first voltage reduction unit and a second voltage reduction unit;
the input end of the rectifying unit is connected with the mains supply, and the output end of the rectifying unit is connected with the input end of the filtering unit;
the input end of the first voltage reduction unit is connected with the output end of the filtering unit, and the output end of the first voltage reduction unit is connected with the input end of the second voltage reduction unit;
the output end of the rectifying unit is also connected with the input end of the power supply detection module; the output end of the filtering unit is also connected with the power supply end of the white light emitting circuit; the output end of the first voltage reduction unit is also connected with the power supply end of the color light emitting circuit; and the output end of the second voltage reduction unit is connected with the first power supply end.
9. The LED light fixture of any of claims 6-8 wherein the white light emitting circuit comprises: the white light lamp string, the constant current driving chip, the first diode, the second diode, the third diode, the fourth diode, the second capacitor, the third capacitor, the fourth capacitor, the fifth capacitor, the sixth capacitor, the seventh capacitor, the tenth resistor, the eleventh resistor, the twelfth resistor, the thirteenth resistor, the fourteenth resistor, the fifteenth resistor and the inductor;
the power supply end of the constant current driving chip is respectively connected with the power supply end of the white light emitting circuit, the cathode of the first diode, the first end of the second capacitor, the first end of the twelfth resistor, the cathode of the second diode, the first end of the thirteenth resistor, the first end of the seventh capacitor and the anode of the white light string, the overvoltage detection end is grounded through the tenth resistor, the dimming control input end is respectively connected with the control end of the white light emitting circuit, the first end of the fourth capacitor and the first end of the eleventh resistor, the grounding end is grounded, the output end is respectively connected with the second end of the fifth capacitor, the anode of the second diode and the first end of the inductor, the current sampling end is grounded through the fourteenth resistor, and the current sampling end is also grounded through the fifteenth resistor;
a second end of the second capacitor is respectively connected with a cathode of the fourth diode and an anode of the third diode;
the cathode of the third diode is respectively connected with the anode of the first diode and the first end of the third capacitor;
a second end of the twelfth resistor is connected with a first end of the fifth capacitor;
the second end of the inductor is respectively connected with the second end of the thirteenth resistor, the first end of the sixth capacitor, the second end of the seventh capacitor and the cathode of the white light string;
a second end of the eleventh resistor, a second end of the fourth capacitor, a second end of the sixth capacitor, a second end of the third capacitor, and an anode of the fourth diode are all grounded.
10. The LED light fixture of any of claims 6-8 wherein the color light emitting circuit comprises: the multi-channel dimming control circuit comprises a multi-channel dimming control chip, an eighth capacitor, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, a nineteenth resistor, a twentieth resistor, a twenty-first resistor, a twenty-second resistor, a twenty-third resistor, a twenty-fourth resistor, a red light string, a green light string and a blue light string;
the power supply end of the multichannel dimming control chip is connected with the power supply end of the color light emitting circuit through the sixteenth resistor, the first dimming input end is connected with the main control module through the seventeenth resistor, the first dimming input end is grounded through the eighteenth resistor, the second dimming input end is connected with the main control module through the nineteenth resistor, the second dimming input end is grounded through the twentieth resistor, the third dimming input end is connected with the main control module through the twenty-first resistor, the third dimming input end is grounded through the twenty-second resistor, the current setting end is grounded through the twenty-third resistor, the current setting end is grounded through the twenty-fourth resistor, and the first output end, the second output end and the third output end are respectively connected with the red light string, the green light strings and the blue light strings are connected in a one-to-one correspondence manner;
and the first end of the eighth capacitor is connected with the power supply end of the multi-channel dimming control chip, and the second end of the eighth capacitor is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021585510.7U CN212367572U (en) | 2020-08-03 | 2020-08-03 | LED synchronous control circuit and LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021585510.7U CN212367572U (en) | 2020-08-03 | 2020-08-03 | LED synchronous control circuit and LED lamp |
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