CN216700383U - High-power-consumption-factor dimming induction control circuit and LED lamp - Google Patents
High-power-consumption-factor dimming induction control circuit and LED lamp Download PDFInfo
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- CN216700383U CN216700383U CN202122309607.6U CN202122309607U CN216700383U CN 216700383 U CN216700383 U CN 216700383U CN 202122309607 U CN202122309607 U CN 202122309607U CN 216700383 U CN216700383 U CN 216700383U
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Abstract
The utility model provides a high-power-consumption-factor dimming induction control circuit and an LED lamp; the control circuit comprises a voltage conversion circuit, a controlled driving circuit, a dimming circuit and an inductive switch circuit; the voltage conversion circuit is used for being connected with alternating current mains supply and connected with the LED lamp string after converting voltage, the controlled drive circuit is used for adjusting the switching time proportion of a high-frequency conversion part of the voltage conversion circuit by controlling the switching frequency of an output end of the controlled drive circuit, the dimming circuit is used for outputting a dimming signal to the controlled drive circuit so that the controlled drive circuit controls the switching frequency of the output end of the controlled drive circuit according to the dimming signal, and the induction switch circuit is used for controlling the on-off of the output end of the controlled drive circuit according to the collected induction signal; the LED lamp comprises the control circuit. The control circuit provided by the utility model simultaneously considers manual dimming and automatic induction switching, and can adapt to the pulse width modulation signal output by the 0-10V dimming module.
Description
Technical Field
The utility model relates to the technical field of lighting circuits, in particular to a high-power-factor dimming induction control circuit and an LED lamp.
Background
In the field of LED lighting, dimming, i.e. adjusting the brightness of a light source, has been a focus of attention. The brightness difference of the LED lamp is different, for example, if the brightness is not high, people have a cool atmosphere, and if the brightness is too high, people have a stuffy feeling. Therefore, the brightness of the light source is accurately adjusted, and the market competitiveness of the LED illumination product is favorably improved.
At present, the common dimming methods are manual dimming and automatic dimming, the manual dimming is to adjust the brightness of the light, control the local area, control the remote control and the like through a dimmer or a control panel, and the automatic dimming is to adjust the brightness of the light automatically by sensing the environmental factors near the LED lamp. The user can select the LED lamp of different modes of adjusting luminance according to self demand, however at present the LED lamp that can compromise manual dimming and auto-induction and adjust luminance can not select simultaneously.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to a high-power factor dimming sensing control circuit and an LED lamp, which solves one or more of the problems of the prior art and provides at least one of the advantages.
In a first aspect, a high-power-factor dimming induction control circuit is provided, which comprises a voltage conversion circuit, a controlled driving circuit, a dimming circuit and an induction switch circuit;
the power taking end of the voltage conversion circuit is used for accessing alternating current commercial power, and the output end of the voltage conversion circuit is used for connecting the LED lamp string;
the output end of the controlled driving circuit is connected with the voltage conversion circuit, and the controlled driving circuit is used for adjusting the switching time proportion of the voltage conversion circuit by controlling the switching frequency of the output end of the controlled driving circuit so as to adjust the brightness of the LED lamp string;
the output end of the dimming circuit is connected with the controlled driving circuit, and the dimming circuit is used for outputting a dimming signal to the controlled driving circuit so that the controlled driving circuit controls the switching frequency of the output end of the controlled driving circuit according to the dimming signal;
the output end of the induction switch circuit is connected with the controlled drive circuit, and the induction switch circuit is used for controlling the on-off of the output end of the controlled drive circuit according to the collected induction signal so as to control the on-off of the LED lamp string.
Further, the voltage conversion circuit comprises a rectification filtering sub-circuit, a transformer sub-circuit and a direct current output sub-circuit, wherein the transformer sub-circuit comprises a primary winding and a secondary winding;
the input end of the rectification filter sub-circuit is used for accessing alternating current mains supply, and the output end of the rectification filter sub-circuit is respectively connected with the first end of the primary winding and the power taking end of the controlled drive circuit;
the output end of the controlled driving circuit is connected with the second end of the primary winding;
the secondary winding is connected with the input end of the direct current output sub-circuit, and the output end of the direct current output sub-circuit is used for being connected with the LED lamp string.
Further, the controlled driving circuit comprises a constant current control chip, a first auxiliary winding sub-circuit and a first switch, and the transformer sub-circuit further comprises a first auxiliary winding;
the first auxiliary winding sub-circuit comprises a third diode, one end of the first auxiliary winding is reversely connected with the power taking end of the constant current control chip through the third diode, and the other end of the first auxiliary winding is grounded;
one end of the first switch is connected with the second end of the primary winding, the other end of the first switch is connected with a pull-down resistor and is grounded through the pull-down resistor, and a trigger end of the first switch is connected with the driving end of the constant current control chip;
the power taking end of the constant current control chip is connected with the first end of the primary winding, the feedback end of the constant current control chip is connected with the first auxiliary winding through a resistor voltage divider, and the current detection end of the constant current control chip is connected with a voltage dividing resistor and is connected with one end of a first switch connected with a pull-down resistor through the voltage dividing resistor.
Further, the dimming circuit comprises a dimmer, a dimming control chip and a second auxiliary winding subcircuit;
the light modulator is connected with the light modulation end of the light modulation control chip, and the light modulation control chip outputs a light modulation signal to the controlled drive circuit according to the modulation signal of the light modulator;
the second auxiliary winding sub-circuit is respectively connected with the voltage conversion circuit and the high-voltage input end of the dimming control chip, and is used for taking electricity from the voltage conversion circuit and supplying power to the high-voltage input end of the dimming control chip;
the output end of the dimming control chip is connected with the dimming end of the controlled drive circuit, and a dimming signal is output to the controlled drive circuit according to the dimming signal of the dimmer; or the dimming control chip is connected with the dimming end of the controlled driving circuit through the optical coupler device, and the light emitting intensity of a diode of the optical coupler device is adjusted according to the adjusting signal of the dimmer, so that the dimming signal is output to the controlled driving circuit.
Furthermore, the inductive switch circuit comprises an inductive module, a voltage stabilizing sub-circuit and an inductive switch sub-circuit;
the input end of the voltage stabilizing sub-circuit is used for being connected with direct-current voltage, the output end of the voltage stabilizing sub-circuit is connected with the power taking end of the induction module, the output end of the induction module is connected with the triggering end of the induction switch sub-circuit, one end of the induction switch sub-circuit is connected with the dimming end of the controlled driving circuit, the power taking end of the controlled driving circuit or the output driving end of the controlled driving circuit, and the other end of the induction switch sub-circuit is grounded.
Further, the inductive switch sub-circuit includes a second switch;
one end of the second switch is connected with the dimming end of the controlled driving circuit, the power taking end of the controlled driving circuit or the output driving end of the controlled driving circuit, the other end of the second switch is grounded, and the triggering end of the second switch is connected with the output end of the induction module.
Further, the inductive switch sub-circuit comprises a second switch and a third switch;
one end of the second switch is connected with the direct-current voltage, the other end of the second switch is connected with the trigger end of the third switch, the trigger end of the second switch is connected with the output end of the induction module, one end of the third switch is connected with the dimming end of the controlled driving circuit, the power taking end of the controlled driving circuit or the output driving end of the controlled driving circuit, and the other end of the third switch is grounded.
Furthermore, the input end of the voltage stabilizing sub-circuit is connected with the voltage conversion circuit, the controlled driving circuit or the dimming circuit, and the voltage stabilizing sub-circuit obtains electricity from the voltage conversion circuit, the controlled driving circuit or the dimming circuit.
Further, the zener sub-circuit includes the eighth resistance, the ninth resistance, the fourth switch, zener diode and fifth electric capacity, the one end of fourth switch is connected with the one end of eighth resistance, the other end of eighth resistance is zener sub-circuit's input, the other end and the induction module of fourth switch get the electric end and be connected, the trigger terminal and the anodal negative pole of zener diode of fourth switch are connected, zener diode's positive pole ground connection, the one end of eighth resistance is connected with the collector of fourth switch, the other end ground connection of eighth resistance, the ninth resistance is connected with the one end and the trigger terminal of the eighth resistance of being connected of fourth switch respectively.
In a second aspect, an LED lamp is provided, which includes the high-pfc dimming sensing control circuit of the first aspect.
The utility model has the beneficial effects that: the LED lamp is provided with a manual dimming structure and an automatic induction structure, the brightness and the on-off of the LED lamp are adjusted through pulse width modulation, meanwhile, manual dimming and an automatic induction switch are considered, and the LED lamp can be matched with a pulse width modulation signal output by a 0-10V dimming module.
Drawings
Fig. 1 is a schematic structural diagram of a high-pfc dimming sensing control circuit according to an embodiment.
FIG. 2 is a circuit diagram of a voltage conversion circuit and a controlled drive circuit of an embodiment.
Fig. 3 is a circuit diagram of a dimming circuit according to an embodiment.
Fig. 4 is a circuit diagram of a dimming circuit of another embodiment.
Fig. 5 is a schematic connection diagram of the voltage conversion circuit, the controlled driving circuit and the dimming circuit in the embodiment of fig. 4.
FIG. 6 is a circuit diagram of an inductive switching circuit of an embodiment.
Fig. 7 is a circuit diagram of an inductive switching circuit of another embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the present invention will be further described with reference to the embodiments and the accompanying drawings.
According to a first aspect of the present invention, a high power factor dimming sensing control circuit is provided.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a high-pfc dimming sensing control circuit according to an embodiment. As shown in fig. 1, the high-pfc dimming sensing control circuit includes a voltage conversion circuit 100, a controlled driving circuit 200, a dimming circuit 300, and an inductive switching circuit 400; the power taking end of the voltage conversion circuit 100 is used for accessing alternating current mains supply, the output end of the voltage conversion circuit 100 is used for connecting the LED lamp string 500, and two output ends of the voltage conversion circuit 100 are respectively connected with the anode and the cathode of the LED lamp string 500; the output end of the controlled driving circuit 200 is connected to the voltage converting circuit 100, and the controlled driving circuit 200 is configured to adjust the switching time ratio of the voltage converting circuit 100 by controlling the switching frequency of the output end thereof, so as to adjust the brightness of the LED light string 500; the output end of the dimming circuit 300 is connected to the controlled driving circuit 200, and the dimming circuit 300 is configured to output a dimming signal to the controlled driving circuit 200, so that the controlled driving circuit 200 controls the switching frequency of the output end thereof according to the dimming signal; the output end of the inductive switch circuit 400 is connected to the controlled driving circuit 200, and the inductive switch circuit 400 is used for controlling the on/off of the output end of the controlled driving circuit 200 according to the collected inductive signal so as to control the on/off of the LED lamp string 500.
In this embodiment, the voltage converting circuit 100 is connected to the ac mains supply and rectifies and filters the ac mains supply to convert the ac mains supply into a dc voltage having a certain ripple component, the dc voltage is converted into a square wave having a required voltage value through high frequency conversion, and finally the square wave voltage is rectified and filtered to be converted into a working voltage of the LED light string 500, the output terminal of the controlled driving circuit 200 is connected to the high frequency converting part of the voltage converting circuit 100, and the controlled driving circuit 200 adjusts the switching time ratio of the high frequency converting part of the voltage converting circuit 100 by controlling the switching frequency of the output terminal thereof, so as to achieve the purpose of stabilizing the output voltage and adjusting the power flowing to the LED light string 500.
The dimming circuit 300 receives an artificial control signal, outputs a dimming signal to the controlled driving circuit 200 according to the dimming action corresponding to the control signal, and the controlled driving circuit 200 adjusts the switching frequency of the output end of the controlled driving circuit according to the dimming action corresponding to the dimming signal after receiving the dimming signal, so as to change the switching time ratio of the high-frequency conversion part of the voltage conversion circuit 100 and adjust the power flowing to the LED light string 500.
The induction switch circuit 400 collects induction signals in real time, and when the collected induction signals are light-off signals, the induction switch circuit 400 controls the output end of the controlled drive circuit 200 to be turned off, so that the voltage conversion circuit 100 cannot normally convert the voltage and output the voltage to the LED lamp string 500, and the LED lamp string 500 is turned off; when the collected sensing signal is a light-on signal, the sensing switch circuit 400 controls the output end of the controlled driving circuit 200 to start, and the controlled driving circuit 200 controls the conversion process of the high-frequency conversion part of the voltage conversion circuit 100, so that the voltage conversion circuit 100 converts the voltage according to the switching frequency of the output end of the controlled driving circuit 200 and outputs the voltage to the LED light string 500, and the LED light string 500 emits light normally. The inductive switch circuit 400 may be based on microwave induction, infrared induction and/or other optical induction to obtain the induction signal.
In one embodiment, as shown in fig. 2, the voltage converting circuit 100 according to the present embodiment includes a rectifying-filtering sub-circuit 110, a transformer sub-circuit 120, and a dc output sub-circuit 130.
The input end of the rectifying and filtering sub-circuit 110 is used for connecting ac mains. The rectifying and filtering sub-circuit 110 includes a fuse FR1, a thermistor VR, a first input node L, a second input node N, a rectifier bridge BR1, a first capacitor C1, a first inductor L1, and a second capacitor C2; the thermistor VR is connected between a first input node L and a second input node N, the first input node L is connected with one end of a fuse FR1, the other end of the fuse FR1 is connected with a first input end of a rectifier bridge BR1, the second input node N is connected with a second input end of a rectifier bridge BR1, a first output end of the rectifier bridge BR1 is connected with one end of a first capacitor C1 and one end of a first inductor L1 respectively, a second output end of the rectifier bridge BR1 is grounded, the other end of the first inductor L1 is connected with one end of a second capacitor C2 and used for outputting input direct-current voltage, and the other ends of the first capacitor C1 and the second capacitor C2 are grounded.
The transformer sub-circuit 120 includes a primary winding NP, a secondary winding NS, a first resistor R1, a third capacitor C3, and a first diode D1, the primary winding NP and the secondary winding NS constituting a high frequency transformer. The output end of the rectifying and filtering sub-circuit 110 is connected to the first end of the primary winding NP and the power-taking end of the controlled driving circuit 200, the output end of the controlled driving circuit 200 is connected to the second end of the primary winding NP, the secondary winding NS is connected to the input end of the dc output sub-circuit 130, and the first resistor R1, the third capacitor C3 and the first diode D1 form a clamping circuit structure at the primary winding NP side.
The output end of the dc output sub-circuit 130 is used for connecting the LED string 500. The dc output sub-circuit 130 includes a second diode D2, a second resistor R2, and a third capacitor C3; the anode of the second diode D2 is connected to the first end of the secondary winding NS, the cathode of the second diode D2 is connected to the anode of the LED string 500, the second end of the secondary winding NS is connected to the cathode of the LED string 500, and the second resistor R2 and the third capacitor C3 are connected between the cathode of the second diode D2 and the second end of the secondary winding NS.
The controlled driving circuit 200 according to this embodiment includes a constant current control chip U1, a first auxiliary winding sub-circuit 210, and a first switch Q1, and the transformer sub-circuit 120 further includes a first auxiliary winding NA, wherein the constant current control chip U1 selects MT7980 series chips, and the first switch Q1 selects an N-type fet.
The first auxiliary winding sub-circuit 210 is used for stabilizing the voltage of the power taking end of the constant current control chip U1, the first auxiliary winding sub-circuit 210 includes a third diode D3, one end of the first auxiliary winding NA is connected with the power taking end of the constant current control chip U1 in an inverse manner through the third diode D3, and the other end of the first auxiliary winding NA is grounded.
The first switch Q1 is used for adjusting the switching time ratio of the high-frequency conversion part of the voltage conversion circuit 100, one end of the first switch Q1 is connected with the second end of the primary winding NP, the other end of the first switch Q1 is connected with the pull-down resistor R7 and is grounded through the pull-down resistor R7, and the trigger end of the first switch Q1 is connected with the driving end of the constant current control chip U1.
The power taking end of the constant current control chip U1 is connected with the first end of the primary winding NP, the constant current control chip U1 is started after power is on, the feedback end of the constant current control chip U1 is connected with the first auxiliary winding NA through the resistor voltage divider R4 and the resistor R5, and the current detection end of the constant current control chip U1 is connected with the voltage dividing resistor R6 and is connected with one end of the first switch Q1, which is connected with the pull-down resistor R7, through the voltage dividing resistor R6.
In one embodiment, as shown in fig. 3, the dimming circuit 300 of the present embodiment includes a dimmer J1, a dimming control chip U2, and a second auxiliary winding sub-circuit 310. The dimming device J1 is a 0-10V dimming device, the dimming control chip U2 is a BP5001 series chip, the dimmer J1 is connected with the dimming end of the dimming control chip U2, and the dimming control chip U2 outputs a dimming signal to the controlled drive circuit 200 according to the dimming signal of the dimmer J1; the second auxiliary winding sub-circuit 310 is respectively connected to the voltage conversion circuit 100 and the high voltage input terminal of the dimming control chip U2, and is used for taking power from the voltage conversion circuit 100 and supplying power to the high voltage input terminal of the dimming control chip U2.
The second auxiliary winding sub-circuit 310 includes a second auxiliary winding ND, a fourth diode D4 and a fourth capacitor C4, one end of the second auxiliary winding ND is connected to the high voltage input terminal of the dimming control chip U2 through the fourth diode D4, the other end of the second auxiliary winding ND is connected to the ground, and the fourth capacitor C4 is connected to the second auxiliary winding ND and the fourth diode D4 in parallel.
The output end of the dimming control chip U2 in this embodiment is connected to the dimming end of the controlled driving circuit 200, and outputs a dimming signal to the controlled driving circuit 200 according to the adjustment signal of the dimmer J1, and the output end of the dimming control chip U2 is connected to the dimming end of the constant current control chip U1, and directly outputs the dimming signal to the dimming end of the constant current control chip U1.
The first auxiliary winding NA and the second auxiliary winding ND are both winding structures on the transformer sub-circuit 120.
In another embodiment, as shown in fig. 4 and 5, the dimming control chip U2 is connected to the controlled driving circuit 200 through an optical coupler OC, and adjusts the light emitting intensity of the diode of the optical coupler OC according to the adjustment signal of the dimmer J1, so as to output the dimming signal to the controlled driving circuit 200. Specifically, dimming control chip U2 is connected with the diode of opto-coupler device OC, make the diode of opto-coupler device OC can give out light after receiving dimming control chip U2's dimming signal, the one end of the triode of opto-coupler device OC is connected with the end of getting with the power of the end of adjusting luminance of constant current control chip U1 respectively, the other end ground connection of the triode of opto-coupler device OC, the triode of opto-coupler device OC switches on when the diode of opto-coupler device OC is luminous, change the level value of the end of adjusting luminance of dimming control chip U2.
The inductive switch circuit 400 of the present embodiment includes an inductive module J2, a voltage regulator sub-circuit 410, and an inductive switch sub-circuit 420. The input end of the voltage-stabilizing sub-circuit 410 is used for connecting a direct-current voltage, the output end of the voltage-stabilizing sub-circuit 410 is connected with the power-taking end of the induction module J2, the output end of the induction module J2 is connected with the trigger end of the induction switch sub-circuit 420, one end of the induction switch sub-circuit 420 is connected with the dimming end of the controlled driving circuit 200, the power-taking end of the controlled driving circuit 200 or the output end of the controlled driving circuit 200, and the other end of the induction switch sub-circuit 420 is grounded.
In one embodiment, as shown in fig. 2 and fig. 6, the sensing switch sub-circuit 420 includes a second switch Q2, one end of the second switch Q2 is connected to the dimming terminal of the controlled driving circuit 200, the power-taking terminal of the controlled driving circuit 200, or the output driving terminal of the controlled driving circuit 200, that is, connected to the dimming terminal of the constant current control chip U1 or the output driving terminal (DRV) of the constant current control chip U1 (fig. 2 does not indicate that the sensing switch sub-circuit 420 is connected to the output driving terminal of the constant current control chip U1), the other end of the second switch Q2 is grounded, and the trigger terminal of the second switch Q2 is connected to the output terminal of the sensing module J2. On the basis of the embodiment of fig. 2, when the light needs to be turned off, the sensing module J2 turns on the second switch Q2, and pulls down the level of the dimming end of the constant current control chip U1 or the output driving end of the constant current control chip U1, whereas when the light needs to be turned on, the sensing module J2 turns off the second switch Q2, and the level of the dimming end of the constant current control chip U1 or the output driving end of the constant current control chip U1 is maintained, so as to control the on/off of the output end of the controlled driving circuit 200.
The voltage regulation sub-circuit 410 includes an eighth resistor R8, a ninth resistor R9, a fourth switch Q4, a voltage regulation diode ZD1 and a fifth capacitor C5. The fourth switch Q4 is an NPN type triode, the collector of the fourth switch Q4 is connected to a direct current voltage through an eighth resistor R8, the emitter of the fourth switch Q4 is connected to the power taking end of the induction module J2, the base of the fourth switch Q4 is connected to the cathode of the zener diode ZD1, the anode of the zener diode ZD1 is grounded, one end of the eighth resistor R8 is connected to the collector of the fourth switch Q4, the other end of the eighth resistor R8 is grounded, and the ninth resistor R9 is connected to the base and the collector of the fourth switch Q4 respectively.
In another embodiment, as shown in fig. 7, the inductive switch subcircuit 420 includes a second switch Q2 and a third switch Q3; one end of the second switch Q2 is connected to the dc voltage, the other end of the second switch Q2 is connected to the trigger end of the third switch Q3, the trigger end of the second switch Q2 is connected to the output end of the sensing module J2, one end of the third switch Q3 is connected to the dimming end of the controlled driving circuit 200 and the output end of the power-taking end controlled driving circuit 200 of the controlled driving circuit 200, and the other end of the third switch Q3 is grounded. When the light needs to be turned off, the sensing module J2 turns on the second switch Q2, so as to turn on the third switch Q3 and pull down the level of the dimming end of the constant current control chip U1 or the output driving end of the constant current control chip U1, whereas when the light needs to be turned on, the sensing module J2 turns off the second switch Q2, so as to turn off the third switch Q3 and maintain the level of the dimming end of the constant current control chip U1 or the output driving end of the constant current control chip U1, so as to control the on and off of the output end of the controlled driving circuit 200.
In some embodiments, the input terminal of the regulator sub-circuit 410 is connected to the voltage conversion circuit 100, the controlled driving circuit 200 or the dimming circuit 300, and the regulator sub-circuit 410 draws power from the voltage conversion circuit 100, the controlled driving circuit 200 or the dimming circuit 300. For example, the input terminal of the regulator sub-circuit 410 may be connected to the power-getting terminal of the constant-current control chip U1, the input terminal of the regulator sub-circuit 410 may be connected to the anode of the LED string 500, the input terminal of the regulator sub-circuit 410 may be connected to the high-voltage input terminal of the dimming control chip U2, and the input terminal of the regulator sub-circuit 410 may be connected to the first terminal of the primary winding NP through the voltage divider circuit.
The voltage stabilizing sub-circuit 410 comprises an eighth resistor R8, a ninth resistor R9, a fourth switch Q4, a voltage stabilizing diode ZD1 and a fifth capacitor C5, one end of the fourth switch Q4 is connected with one end of the eighth resistor R8, the other end of the eighth resistor R8 is an input end of the voltage stabilizing sub-circuit 410, the other end of the fourth switch Q4 is connected with a power taking end of the sensing module J2, a trigger end of the fourth switch Q4 is connected with a cathode of the voltage stabilizing diode ZD1, an anode of the voltage stabilizing diode ZD1 is grounded, one end of the eighth resistor R8 is connected with a collector of the fourth switch Q4, the other end of the eighth resistor R8 is grounded, and the ninth resistor R9 is connected with one end and the trigger end of the fourth switch Q4, which are connected with the eighth resistor R8.
The first switch Q1, the second switch Q2, the third switch Q3, and the third switch Q3 may be transistors or field effect transistors.
According to a second aspect of the present invention, an LED lamp is provided, where the LED lamp includes the above-mentioned high-power-factor dimming sensing control circuit, and the specific structure of the high-power-factor dimming sensing control circuit refers to the above-mentioned embodiments.
As used herein, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including not only those elements listed, but also other elements not expressly listed.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A high power consumption factor dimming induction control circuit is characterized by comprising a voltage conversion circuit, a controlled driving circuit, a dimming circuit and an induction switch circuit;
the power taking end of the voltage conversion circuit is used for accessing alternating current commercial power, and the output end of the voltage conversion circuit is used for connecting the LED lamp string;
the output end of the controlled driving circuit is connected with the voltage conversion circuit, and the controlled driving circuit is used for adjusting the switching time proportion of the voltage conversion circuit by controlling the switching frequency of the output end of the controlled driving circuit so as to adjust the brightness of the LED lamp string;
the output end of the dimming circuit is connected with the controlled driving circuit, and the dimming circuit is used for outputting a dimming signal to the controlled driving circuit so that the controlled driving circuit controls the switching frequency of the output end of the controlled driving circuit according to the dimming signal;
the output end of the induction switch circuit is connected with the controlled drive circuit, and the induction switch circuit is used for controlling the on-off of the output end of the controlled drive circuit according to the collected induction signal so as to control the on-off of the LED lamp string.
2. The high power factor dimming induction control circuit of claim 1, wherein the voltage conversion circuit comprises a rectifying and filtering sub-circuit, a transformer sub-circuit, a dc output sub-circuit, the transformer sub-circuit comprising a primary winding and a secondary winding;
the input end of the rectification filter sub-circuit is used for being connected with alternating current mains supply, and the output end of the rectification filter sub-circuit is respectively connected with the first end of the primary winding and the power taking end of the controlled driving circuit;
the output end of the controlled driving circuit is connected with the second end of the primary winding;
the secondary winding is connected with the input end of the direct current output sub-circuit, and the output end of the direct current output sub-circuit is used for being connected with the LED lamp string.
3. The high power factor dimming inductive control circuit of claim 2, wherein the controlled drive circuit comprises a constant current control chip, a first auxiliary winding sub-circuit and a first switch, the transformer sub-circuit further comprising a first auxiliary winding;
the first auxiliary winding sub-circuit comprises a third diode, one end of the first auxiliary winding is reversely connected with the power taking end of the constant current control chip through the third diode, and the other end of the first auxiliary winding is grounded;
one end of the first switch is connected with the second end of the primary winding, the other end of the first switch is connected with a pull-down resistor and is grounded through the pull-down resistor, and a trigger end of the first switch is connected with the driving end of the constant current control chip;
the power taking end of the constant current control chip is connected with the first end of the primary winding, the feedback end of the constant current control chip is connected with the first auxiliary winding through a resistor voltage divider, and the current detection end of the constant current control chip is connected with a divider resistor and is connected with one end of a first switch connected with a pull-down resistor through the divider resistor.
4. The high power factor dimming inductive control circuit of claim 1, wherein the dimming circuit comprises a dimmer, a dimming control chip, and a second auxiliary winding sub-circuit;
the light modulator is connected with the light modulation end of the light modulation control chip, and the light modulation control chip outputs a light modulation signal to the controlled drive circuit according to the modulation signal of the light modulator;
the second auxiliary winding sub-circuit is respectively connected with the voltage conversion circuit and the high-voltage input end of the dimming control chip, and is used for taking electricity from the voltage conversion circuit and supplying power to the high-voltage input end of the dimming control chip;
the output end of the dimming control chip is connected with the dimming end of the controlled driving circuit, and a dimming signal is output to the controlled driving circuit according to the dimming signal of the dimmer; or the dimming control chip is connected with the dimming end of the controlled driving circuit through the optical coupler device, and the light emitting intensity of a diode of the optical coupler device is adjusted according to the adjusting signal of the dimmer, so that the dimming signal is output to the controlled driving circuit.
5. The high power factor dimming inductive control circuit of claim 1, wherein the inductive switching circuit comprises an inductive module, a voltage regulator sub-circuit, and an inductive switch sub-circuit;
the input end of the voltage stabilizing sub-circuit is used for being connected with direct-current voltage, the output end of the voltage stabilizing sub-circuit is connected with the power taking end of the induction module, the output end of the induction module is connected with the triggering end of the induction switch sub-circuit, one end of the induction switch sub-circuit is connected with the dimming end of the controlled driving circuit, the power taking end of the controlled driving circuit or the output driving end of the controlled driving circuit, and the other end of the induction switch sub-circuit is grounded.
6. The high power factor dimming inductive control circuit of claim 5, wherein the inductive switch sub-circuit comprises a second switch;
one end of the second switch is connected with a dimming end of the controlled driving circuit, a power taking end of the controlled driving circuit or an output driving end of the controlled driving circuit, the other end of the second switch is grounded, and a triggering end of the second switch is connected with an output end of the induction module.
7. The high power factor dimming inductive control circuit of claim 5, wherein the inductive switch sub-circuit comprises a second switch and a third switch;
direct current voltage is connected to the one end of second switch, the other end of second switch is connected with the trigger end of third switch, the trigger end of second switch is connected with the output of response module, the one end of third switch is connected with controlled drive circuit's the end of adjusting luminance, controlled drive circuit's the end of getting electricity or controlled drive circuit's output drive end, the other end ground connection of third switch.
8. The high-dissipation-factor dimming induction control circuit according to any one of claims 5-7, wherein an input terminal of the voltage regulation sub-circuit is connected to the voltage conversion circuit, the controlled driving circuit or the dimming circuit, and the voltage regulation sub-circuit draws power from the voltage conversion circuit, the controlled driving circuit or the dimming circuit.
9. The high power consumption factor dimming induction control circuit according to any one of claims 5 to 7, wherein the voltage regulator sub-circuit comprises an eighth resistor, a ninth resistor, a fourth switch, a zener diode and a fifth capacitor, one end of the fourth switch is connected to one end of the eighth resistor, the other end of the eighth resistor is an input end of the voltage regulator sub-circuit, the other end of the fourth switch is connected to a power taking end of the induction module, a trigger end of the fourth switch is connected to a cathode of the zener diode, an anode of the zener diode is grounded, one end of the eighth resistor is connected to a collector of the fourth switch, the other end of the eighth resistor is grounded, and the ninth resistor is respectively connected to one end of the fourth switch connected to the eighth resistor and the trigger end.
10. An LED lamp comprising the high dissipation factor dimming sensing control circuit of any of claims 1-9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122309607.6U CN216700383U (en) | 2021-09-23 | 2021-09-23 | High-power-consumption-factor dimming induction control circuit and LED lamp |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122309607.6U CN216700383U (en) | 2021-09-23 | 2021-09-23 | High-power-consumption-factor dimming induction control circuit and LED lamp |
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| Publication Number | Publication Date |
|---|---|
| CN216700383U true CN216700383U (en) | 2022-06-07 |
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| CN202122309607.6U Active CN216700383U (en) | 2021-09-23 | 2021-09-23 | High-power-consumption-factor dimming induction control circuit and LED lamp |
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| CN (1) | CN216700383U (en) |
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