CN218277202U - Dimming control circuit for adjusting LED lamp in five-star hotel lighting system - Google Patents
Dimming control circuit for adjusting LED lamp in five-star hotel lighting system Download PDFInfo
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- CN218277202U CN218277202U CN202221364785.7U CN202221364785U CN218277202U CN 218277202 U CN218277202 U CN 218277202U CN 202221364785 U CN202221364785 U CN 202221364785U CN 218277202 U CN218277202 U CN 218277202U
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Abstract
The utility model discloses a dimming control circuit for adjusting LED lamp among five-star hotel lighting system, this power supply circuit, bridge rectifier circuit, the dimmer circuit, LED drive control circuit, LED load circuit, the dimmer circuit is established ties between 220V alternating current power supply VAC's input L and bridge rectifier circuit, LED drive control circuit includes LED drive control chip U1, the rear end electricity of dimmer circuit and bridge rectifier circuit is connected with PMOS pipe Q1, the drain electrode of PMOS pipe Q1 is connected with LED load circuit electricity, the source electrode of PMOS pipe Q1 is connected with LED drive control chip U1's BLDR pin electricity and forms common port A, LED drive control chip U1 is through the switching on or the disconnection of its BLDR pin control dimmer, through this kind of voltage dimming mode of the size of changing the dimmer conduction phase angle, can realize the light-adjusting to the LED lamp; the utility model discloses a LED drive control chip U1's GATE pin output PWM signal to the electric current that LED load circuit was flowed through in the control, thereby realize the regulation and control to LED lamp luminance.
Description
Technical Field
The utility model relates to a lighting system technical field especially relates to a be applied to dimming control circuit that light was adjusted among five-star hotel lighting system.
Background
In the five-star hotel lighting system in the prior art, generally, only can open and close the operation to light, can not adjust the luminance of light, when the light that need not to use so bright shines, because light luminance can not the dim, cause the energy extravagant, also increased the cost moreover, also can't satisfy customer's requirement.
In addition, at present, when the standard type silicon controlled rectifier is directly used for dimming the LED lamp, the silicon controlled rectifier is adopted for dimming the LED, but because the current drive is provided by the existing LED lighting system by adopting an alternating current power supply, the silicon controlled rectifier is directly connected into an alternating current power supply circuit, the current drive circuit has the problems of poor compatibility of the driving power supply and the silicon controlled rectifier, unstable power supply work and noise, and sometimes, when the voltage of the alternating current power supply changes, the light of the LED lamp is stroboscopically caused and even the circuit is damaged.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem that prior art exists, the utility model provides a can adjust luminance, adjust luminance effectual, and can not appear light scintillation, can satisfy the user demand, can also save the dimming control circuit of resource to the lighting system in the five-star hotel.
In order to solve the technical problem, the utility model provides a dimming control circuit for adjusting LED lamp among lighting system of five-star hotel, include the dimming control circuit who adjusts luminance to lighting system of five-star hotel, dimming control circuit includes power supply circuit, bridge rectifier circuit, dimmer circuit, LED drive control circuit, LED load circuit, power supply circuit, bridge rectifier circuit, dimmer circuit, LED drive control circuit, LED load circuit loop through the electricity to be connected;
the power supply circuit is a 220V alternating current power VAC and is used for supplying power to each part of circuit;
the dimmer circuit is connected between an input end L of a 220V alternating current power supply VAC and a bridge rectifier circuit in series, the bridge rectifier circuit rectifies the 220V alternating current power supply and converts the alternating current power supply into direct current voltage, and the direct current voltage is supplied to the dimmer circuit and the LED drive control circuit;
the LED driving control circuit comprises an LED driving control chip U1, and the model of the LED driving control chip U1 is an LED controller LM3445;
the LED load circuit comprises a plurality of groups of LED lamps, and the LED lamps are mutually connected and then electrically connected with the dimmer circuit and the LED drive control chip U1;
the LED driving control circuit comprises a dimmer circuit, a bridge rectifier circuit, a resistor R2, a Schottky diode D1 and a PMOS tube Q1, wherein the rear ends of the dimmer circuit and the bridge rectifier circuit are electrically connected with one end of the resistor R2, the other end of the resistor R2 is electrically connected with the cathode of the Schottky diode D1 and then is electrically connected with the grid electrode of the PMOS tube Q1, the anode of the Schottky diode D1 is grounded, the drain electrode of the PMOS tube Q1 is electrically connected with an LED load circuit, the source electrode of the PMOS tube Q1 is electrically connected with a BLDR pin of an LED driving control chip U1 to form a common end A, and the LED driving control chip U1 controls the conduction or disconnection of the dimmer through the BLDR pin to change the conduction phase angle of the dimmer, so that the dimming of an LED lamp is realized;
and a GATE pin of the LED drive control chip U1 outputs a PWM signal to control the current flowing through the LED load circuit, so that the brightness of the LED lamp is regulated and controlled.
Aiming at the further improvement of the technical scheme, the dimmer circuit comprises a DIAC, a TRIAC, a capacitor CT and a resistor RT, wherein the capacitor CT is connected with the resistor RT to form a common terminal C, one end of the DIAC is electrically connected with the common terminal C, one end of the DIAC is electrically connected with a control electrode G of the TRIAC, an a electrode of the TRIAC is electrically connected with a BLDR pin of the LED driving control chip U1, and the LED driving control chip U1 outputs voltage through the BLDR pin to enable the TRIAC to be conducted.
Aiming at the further improvement of the technical scheme, a resistor R5 is connected to the source electrode of the PMOS tube Q1, and the resistor R5 is electrically connected to the public end A connected with the source electrode of the PMOS tube Q1 and the BLDR pin of the LED drive control chip U1 so as to discharge the electric charges on the BLDR pin of the LED drive control chip U1.
Aiming at the further improvement of the technical scheme, the dimming control circuit comprises a voltage reduction conversion circuit, the voltage reduction conversion circuit is positioned between the LED load circuit and the LED drive control circuit and is electrically connected with the LED load circuit, the voltage reduction conversion circuit consists of an NMOS tube Q2, an inductor L2, a diode D10 and a capacitor C12, the grid of the NMOS tube Q2 is electrically connected with a GATE pin of the LED drive control chip U1, the cathode of the diode D10 is electrically connected with one end of the inductor L2, the anode of the diode D10 is electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is electrically connected with the other end of the inductor L2, the end, connected with the cathode of the diode D10, of the inductor L2 is electrically connected with the drain of the NMOS tube Q2, the source electrode of the NMOS tube Q2 is connected with a resistor R3, the other end of the resistor R3 is grounded, a plurality of groups of LED lamps are electrically connected with the voltage reduction conversion circuit, and the GATE pin of the LED drive control chip U1 outputs a PWM signal to control the NMOS tube Q2 so as to drive the LED lamps to be bright.
Further improvement aiming at the technical scheme is that the bridge rectifier circuit comprises a diode VD1, a diode VD2, a diode VD3 and a diode VD4, wherein the diode VD1, the diode VD3, the diode VD4 and the diode VD2 are sequentially and electrically connected.
Aiming at the further improvement of the technical scheme, the dimming control circuit comprises a passive PFC circuit, the passive PFC circuit is electrically connected between the bridge rectifier circuit and the buck conversion circuit, and the voltage rectified by the bridge rectifier circuit outputs the voltage Vbuck through the passive PFC circuit so as to be used as the bus voltage of the buck conversion circuit.
Aiming at the further improvement of the technical scheme, the passive PFC circuit comprises an electrolytic capacitor C7, an electrolytic capacitor C9, a diode D4, a diode D8, a diode D9 and a capacitor C10, wherein the anode of the electrolytic capacitor C7 is electrically connected with the anode of the diode D9, the anode of the diode D8 and the anode of the electrolytic capacitor C9 are both electrically connected with the cathode of the diode D9, the cathode of the electrolytic capacitor C7 is electrically connected with the anode of the diode D4 and the cathode of the diode D8, the cathode of the diode D4 is electrically connected with the cathode of the electrolytic capacitor C9, one end of the capacitor C10 is connected at the electric connection position of the diode D4 and the electrolytic capacitor C9, and the other end of the capacitor C10 is connected at the electric connection position of the electrolytic capacitor C7 and the diode D9.
The further improvement to the above technical scheme, be connected with schottky diode D2 and electric capacity C5 between LED drive control chip U1's BLDR pin and the VCC pin, schottky diode D2's negative pole is connected with electric capacity C5's one end electricity, and electric capacity C5's the other end ground connection, schottky diode D2's positive pole is connected so that maintain the voltage on LED drive control chip U1 its VCC pin with LED drive control chip U1's BLDR pin electricity.
Compared with the prior art, the utility model is used for adjusting the dimming control circuit of LED lamp among the five-star hotel lighting system contains following technological effect at least:
(1) The utility model discloses a dimming control circuit includes power supply circuit, bridge rectifier circuit, dimmer circuit, LED drive control circuit, LED load circuit, dimmer circuit establishes ties between 220V alternating current power VAC's input L and bridge rectifier circuit, LED drive control circuit includes LED drive control chip U1, LED drive control chip U1's model is LED controller LM3445, LED load circuit includes multiunit LED lamp, connect with dimmer circuit, LED drive control chip U1 electricity after each other between LED lamp and the LED lamp; the rear ends of the dimmer circuit and the bridge rectifier circuit are electrically connected with a PMOS tube Q1, the drain electrode of the PMOS tube Q1 is electrically connected with the LED load circuit, the source electrode of the PMOS tube Q1 is electrically connected with a BLDR pin of the LED drive control chip U1 to form a public end A, the LED drive control chip U1 controls the conduction or the disconnection of the dimmer through the BLDR pin, and the dimming of the LED lamp can be realized by changing the voltage dimming mode of the conduction condition of the dimmer; the utility model discloses a LED drive control chip U1's GATE pin output PWM signal to LED load circuit's electric current is flowed in the control, and the regulation and control to LED lamp luminance can be realized through this kind of electric current mode of adjusting luminance. Through the utility model discloses a combination of dimmer and LED drive control chip U1 can adjust luminance to the LED lamp to it is effectual to adjust luminance, makes the LED lamp not have any light scintillation, and LED lamp luminance is even stable, can satisfy the user demand, can also save the resource.
(2) The utility model discloses a dimming control circuit includes passive PFC circuit, passive PFC circuit electricity is connected between bridge rectifier circuit and step-down converting circuit, voltage after the rectification through bridge rectifier circuit is through passive PFC circuit output voltage Vbuck, vbuck voltage exported can regard as step-down converting circuit's bus voltage, this passive PFC circuit is by electrolytic capacitor C7, electrolytic capacitor C9, diode D4, diode D8, diode D9 constitutes, can be used for replacing a traditional large capacity filter capacitor, when electrolytic capacitor C7, when electrolytic capacitor C9 charges, can attenuate the voltage ripple that the passive circuit exported, thereby ensure ripple current's invariant, and then help prolonging the life of LED lamp.
Drawings
The following combines attached drawing and embodiment to carry out the detailed description for adjusting the dimming control circuit of LED lamp among five-star hotel lighting system and its technological effect, wherein:
fig. 1 is a schematic diagram of a circuit module of the dimming control circuit of the present invention;
fig. 2 is a circuit diagram of the dimming control circuit of the present invention;
fig. 3 is a circuit diagram of a dimmer circuit in the dimming control circuit of the present invention;
fig. 4 is a sine wave diagram of a 220V ac power VAC in the dimming control circuit of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, the utility model provides an embodiment provides a dimming control circuit for adjusting LED lamp among five-star hotel lighting system, include the dimming control circuit who adjusts luminance to five-star hotel's lighting system, dimming control circuit includes power supply circuit, bridge rectifier circuit, dimmer circuit, LED drive control circuit, LED load circuit, and power supply circuit, bridge rectifier circuit, dimmer circuit, LED drive control circuit, LED load circuit loop through the electricity and connect.
As shown in fig. 2-3, the power supply circuit is a 220V ac power supply VAC, the operating frequency of the 220V ac power supply VAC is 50hz, and the 220v ac power supply VAC is used for supplying power to various circuits; the dimming circuit is connected between the input end L of a 220V alternating current power supply VAC and the bridge rectifier circuit in series, the bridge rectifier circuit rectifies the 220V alternating current power supply and converts the alternating current power supply into direct current voltage, and the direct current voltage is supplied to the dimming circuit and the LED drive control circuit; the LED driving control circuit comprises an LED driving control chip U1, and the type of the LED driving control chip U1 is an LED controller LM3445; the LED load circuit comprises a plurality of groups of LED lamps, and the LED lamps are mutually connected and then electrically connected with the dimmer circuit and the LED drive control chip U1; the LED driving control chip U1 controls the on-off of the dimmer through the BLDR pin, and the LED driving control chip U1 controls the on-off of the dimmer through the voltage dimming mode of changing the conduction phase angle of the dimmer; the utility model discloses a LED drive control chip U1's GATE pin output PWM signal to LED load circuit's electric current is flowed in the control, and the regulation and control to LED lamp luminance can be realized through this kind of electric current mode of adjusting luminance. Additionally, the utility model discloses a series connection route rectifier is constituteed to resistance R2, schottky diode D1 and PMOS pipe Q1 of bridge rectifier circuit and bridge rectifier circuit's rear end, can supply LED drive control chip U1 power consumption for an appropriate level with the line voltage conversion of bridge rectifier circuit rectification.
In other embodiments, the model of the LED driving control chip U1 may also select an LED constant current driving controller of BP 3368.
The utility model discloses a bridge rectifier circuit includes diode VD1, diode VD3, diode VD4, diode VD2, and diode VD1, diode VD3, diode VD4, diode VD2 loop through the electricity and connect.
As shown in fig. 3, when the embodiment of the present invention is specifically implemented, the dimmer circuit is composed of a DIAC diode DIAC, a TRIAC dimmer, a capacitor CT, a resistor RT, the capacitor CT is connected with the resistor RT and forms a common terminal C, one end of the DIAC is electrically connected with the common terminal C, one end of the DIAC diode DIAC is electrically connected with a control electrode G of the TRIAC dimmer, an a electrode of the TRIAC dimmer is electrically connected with a BLDR pin of the LED driving control chip U1, and the LED driving control chip U1 makes the TRIAC switch on through a BLDR pin output voltage.
The utility model discloses during the concrete realization, be connected with resistance R5 on PMOS pipe Q1's source electrode, resistance R5 electricity is connected in public end A department that PMOS pipe Q1 source electrode and LED drive control chip U1's BLDR pin are connected, and wherein, resistance R5's effect has two: firstly, be convenient for bleed off the electric charge on its BLDR pin of LED drive control chip U1, because there is not the connecting capacitor on the source of PMOS pipe Q1, when the voltage of rectifier circuit drops to below 15V, the voltage on the BLDR pin of LED drive control chip U1 reduces along with the line voltage of rectification, can be used as the electric charge of the parasitic capacitance in the internal of the BLDR pin of bleed off through resistance R5. And secondly, when the circuit is operated on a low current output, the required holding current is provided for the dimmer.
The embodiment of the utility model provides a during the concrete realization, this dimming control circuit is including step-down converting circuit, step-down converting circuit is located between LED load circuit and the LED drive control circuit and is connected rather than the electricity, step-down converting circuit is by NMOS pipe Q2, inductor L2, diode D10, electric capacity C12 is constituteed, NMOS pipe Q2's grid is connected with LED drive control chip U1's GATE pin electricity, diode D10's negative pole is connected with inductor L2's one end electricity, diode D10's positive pole is connected with electric capacity C12's one end electricity, the electric capacity C12 other end is connected with inductor L2's other end electricity, inductor L2 is connected with that one end that diode D10 negative pole links to each other and NMOS pipe Q2's drain electrode electricity is connected, NMOS pipe Q2's source electrode is connected with resistance R3, resistance R3's one end is connected with NMOS pipe Q2's source electrode electricity, resistance R3's other end ground connection, multiunit LED lamp is connected with step-down converting circuit electricity, NMOS GATE pin output PWM signal of LED drive control chip U1 controls switching on of switch on so that drive LED manages Q2 brightly. The utility model discloses utilize NMOS pipe Q2, inductor L2, diode D10, electric capacity C12 to constitute step-down converting circuit and can drive the LED lamp and light. When the GATE pin of the LED driving control chip U1 outputs the PWM signal to drive the NMOS transistor Q2 to be turned on, the current passing through the inductor L2 and the LED lamp linearly increases, and is sensed by the resistor R3. When the voltage across the resistor R3 is equal to the reference voltage 2.8V at the pin FLTR2 of the LED driving control chip U1, the NMOS transistor Q2 is turned off, the inductor L2 releases stored energy, the diode D10 is turned on, and the current passes through the LED lamp and the inductor L2 and linearly decreases from the peak current value thereof, wherein the capacitor C12 may be used to eliminate most of the ripple current of the inductor L2.
The utility model discloses during the concrete realization, this dimming control circuit includes passive PFC circuit, and passive PFC circuit electricity is connected between bridge rectifier circuit and step-down converting circuit, and the voltage after the bridge rectifier circuit rectification can regard as step-down converting circuit's bus voltage through passive PFC circuit output voltage Vbuck, voltage Vbuck that exports. Wherein, passive PFC circuit includes electrolytic capacitor C7, electrolytic capacitor C9, diode D4, diode D8, diode D9, electric capacity C10, electrolytic capacitor C7's positive pole and diode D9's anodal electric connection, diode D8's positive pole and electrolytic capacitor C9's positive pole all are connected with diode D9's negative pole electric connection, electrolytic capacitor C7's negative pole and diode D4's positive pole and diode D8's negative pole electric connection, diode D4's negative pole and electrolytic capacitor C9's negative pole electric connection, the electric connection department at diode D4 and electrolytic capacitor C9 is connected to electric capacity C10's one end, electrolytic capacitor C7 and diode D9's electric connection department are connected to electric capacity C10's the other end, when specifically realizing, the utility model discloses electrolytic capacitor C7's capacitance value C7 equals with electrolytic capacitor C9's capacitance value C9. As shown in fig. 2 and 4, the specific working process of the passive PFC circuit is as follows: when the voltage of a 220V alternating current power supply VAC working at the frequency of 50Hz changes according to a sine rule, in a 1/4 period of changing from 0 to a peak value Vm, diodes VD2 and VD3 in the bridge rectifier circuit are conducted, and correspondingly, the diodes VD1 and VD4 are cut off, at the moment, current charges an electrolytic capacitor C7 and flows through a diode D8 to charge an electrolytic capacitor C9; when the voltage instantaneous value of the 220V alternating current power supply VAC reaches Vm, the capacitance value C7 of the electrolytic capacitor C7 is equal to the capacitance value C9 of the electrolytic capacitor C9, therefore, the voltages on the electrolytic capacitor C7 and the electrolytic capacitor C9 are the same and are respectively one half Vm, when the voltage of the 220V alternating current power supply VAC is reduced from the peak value, the electrolytic capacitor C7 is rapidly discharged through an LED lamp and a diode D4, the reduction rate is much faster than that of the voltage of the 220V alternating current power supply VAC according to a sine rule, and diodes VD2 and VD3 are always conducted until the warm-up value of the voltage of the VAC reaches 1/2 Vm; when the voltage warm-up value of the 220V alternating current power supply VAC is smaller than 1/2Vm, the electrolytic capacitor C9 discharges through the diode D9 and the LED lamp, and when the voltage warm-up value input by the 220V alternating current power supply VAC is lower than the DC bus voltage output by the output end of the bridge rectifier circuit, the diodes VD2 and VD3 are cut off; when the instantaneous voltage of the 220V alternating current power supply VAC is higher than the DC bus voltage output by the output end of the bridge rectifier circuit, the diode VD1 and the diode VD4 can be conducted due to forward bias; when the diodes VD1 and VD4 are conducted, the electrolytic capacitor C7 and the electrolytic capacitor C9 are charged again, and when the electrolytic capacitor C7 and the electrolytic capacitor C9 are charged, the voltage ripple output by the passive PFC circuit can be attenuated, so that the constancy of the ripple current is ensured, and the service life of the LED lamp is further prolonged.
The utility model discloses a be connected with schottky diode D2 and electric capacity C5 between LED drive control chip U1's BLDR pin and the VCC pin, schottky diode D2's negative pole is connected with electric capacity C5's one end electricity, electric capacity C5's other end ground connection, schottky diode D2's positive pole is connected with LED drive control chip U1's BLDR pin electricity, and wherein, schottky diode D2 and electric capacity C5's effect is: when the voltage on the BLDR pin of the LED driving control chip U1 becomes low, the voltage on the VCC pin of the LED driving control chip U1 is maintained through the schottky diode D2 and the capacitor C5. Additionally, the utility model discloses be connected with resistance R1, electric capacity C3 on LED drive control chip U1's the ASNS pin, resistance R1's one end and LED drive control chip U1's the ASNS pin electricity is connected, and resistance R1's the other end and electric capacity C3 electricity are connected, and resistance R1 and electric capacity C3 constitute a low pass filter to filter for LED drive control chip U1.
Compared with the prior art, the technical scheme disclosed by the embodiment has the following beneficial effects:
in the above embodiment, the utility model discloses a rear end of dimmer circuit and bridge rectifier circuit is connected with PMOS pipe Q1, PMOS pipe Q1's drain electrode is connected with LED load circuit electricity, PMOS pipe Q1's source electrode is connected with LED drive control chip U1's BLDR pin electricity and forms common port A, LED drive control chip U1 controls the switching on or off of dimmer through its BLDR pin, through this kind of voltage dimming mode of changing the dimmer on-state, can adjust luminance to the LED lamp; the utility model discloses a LED drive control chip U1's GATE pin output PWM signal to LED load circuit's electric current is flowed in the control, and the regulation and control to LED lamp luminance can be realized through this kind of electric current mode of adjusting luminance. Through the utility model discloses a combination of dimmer and LED drive control chip U1 can adjust luminance to the LED lamp to adjust luminance effectually, make the LED lamp not have any light scintillation, LED lamp luminance is even stable, can satisfy the user demand, can also save the resource.
The above-disclosed embodiments are merely exemplary embodiments of the present invention, which should not be construed as limiting the scope of the invention, but rather as equivalent variations of the invention are covered by the following claims.
Claims (8)
1. The utility model provides a dimming control circuit for adjusting LED lamp among five-star hotel lighting system which characterized in that: the LED driving control circuit comprises a dimming control circuit for dimming a lighting system of the five-star hotel, wherein the dimming control circuit comprises a power supply circuit, a bridge rectifier circuit, a dimmer circuit, an LED driving control circuit and an LED load circuit, and the power supply circuit, the bridge rectifier circuit, the dimmer circuit, the LED driving control circuit and the LED load circuit are sequentially and electrically connected;
the power supply circuit is a 220V alternating current power VAC;
the dimmer circuit is connected between an input end L of a 220V alternating current power supply VAC and a bridge rectifier circuit in series, the bridge rectifier circuit rectifies the 220V alternating current power supply and converts the alternating current power supply into direct current voltage, and the direct current voltage is supplied to the dimmer circuit and the LED drive control circuit;
the LED drive control circuit comprises an LED drive control chip U1;
the LED load circuit comprises a plurality of groups of LED lamps, and the LED lamps are connected with each other and then electrically connected with the dimmer circuit and the LED drive control chip U1;
the LED driving control circuit comprises a dimmer circuit, a bridge rectifier circuit, a resistor R2, a Schottky diode D1 and a PMOS tube Q1, wherein the rear ends of the dimmer circuit and the bridge rectifier circuit are electrically connected with one end of the resistor R2, one end of the resistor R2 is electrically connected with the bridge rectifier circuit, the other end of the resistor R2 is electrically connected with the cathode of the Schottky diode D1 and then is electrically connected with the grid of the PMOS tube Q1, the anode of the Schottky diode D1 is grounded, the drain electrode of the PMOS tube Q1 is electrically connected with an LED load circuit, the source electrode of the PMOS tube Q1 is electrically connected with a BLDR pin of an LED driving control chip U1 to form a common end A, and the LED driving control chip U1 controls the conduction or disconnection of a dimmer through the BLDR pin;
and a GATE pin of the LED drive control chip U1 outputs a PWM signal to control the current flowing through the LED load circuit, so that the brightness of the LED lamp is regulated and controlled.
2. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: the LED driving control circuit is characterized in that the dimmer circuit is composed of a bidirectional trigger diode DIAC, a silicon controlled dimmer TRIAC, a capacitor CT and a resistor RT, the capacitor CT and the resistor RT are connected and form a public end C, one end of the bidirectional trigger diode DIAC is electrically connected with the public end C, one end of the bidirectional trigger diode DIAC is electrically connected with a control electrode G of the silicon controlled dimmer TRIAC, an A pole of the silicon controlled dimmer TRIAC is electrically connected with a BLDR pin of the LED driving control chip U1, and the LED driving control chip U1 enables the silicon controlled dimmer TRIAC to be conducted through output voltage of the BLDR pin.
3. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: the source electrode of the PMOS tube Q1 is connected with a resistor R5, and the resistor R5 is electrically connected to the public end A connected with the BLDR pin of the source electrode of the PMOS tube Q1 and the LED drive control chip U1 so as to discharge electric charges on the BLDR pin of the LED drive control chip U1.
4. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: the dimming control circuit comprises a voltage-reducing conversion circuit, the voltage-reducing conversion circuit is located between the LED load circuit and the LED drive control circuit and is electrically connected with the LED load circuit, the voltage-reducing conversion circuit is composed of an NMOS tube Q2, an inductor L2, a diode D10 and a capacitor C12, the grid of the NMOS tube Q2 is electrically connected with a GATE pin of an LED drive control chip U1, the negative electrode of the diode D10 is electrically connected with one end of the inductor L2, the positive electrode of the diode D10 is electrically connected with one end of the capacitor C12, the other end of the capacitor C12 is electrically connected with the other end of the inductor L2, the end, connected with the negative electrode of the diode D10, of the inductor L2 is electrically connected with the drain electrode of the NMOS tube Q2, the source electrode of the NMOS tube Q2 is connected with a resistor R3, a plurality of groups of LED lamps are electrically connected with the voltage-reducing conversion circuit, and the GATE pin of the LED drive control chip U1 outputs a PWM signal to control the conduction of the NMOS tube Q2 so as to drive the LED lamp to be bright.
5. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: the bridge rectifier circuit comprises a diode VD1, a diode VD2, a diode VD3 and a diode VD4, wherein the diode VD1, the diode VD3, the diode VD4 and the diode VD2 are sequentially and electrically connected.
6. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: the dimming control circuit comprises a passive PFC circuit, the passive PFC circuit is electrically connected between the bridge rectifier circuit and the step-down conversion circuit, and the voltage rectified by the bridge rectifier circuit outputs the voltage Vbuck through the passive PFC circuit.
7. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 6, wherein: the passive PFC circuit comprises an electrolytic capacitor C7, an electrolytic capacitor C9, a diode D4, a diode D8, a diode D9 and a capacitor C10, wherein the anode of the electrolytic capacitor C7 is electrically connected with the anode of the diode D9, the anode of the diode D8 and the anode of the electrolytic capacitor C9 are both electrically connected with the cathode of the diode D9, the cathode of the electrolytic capacitor C7 is electrically connected with the anode of the diode D4 and the cathode of the diode D8, the cathode of the diode D4 is electrically connected with the cathode of the electrolytic capacitor C9, one end of the capacitor C10 is connected to the position where the diode D4 is electrically connected with the electrolytic capacitor C9, and the other end of the capacitor C10 is connected to the position where the electrolytic capacitor C7 is electrically connected with the diode D9.
8. The dimming control circuit for adjusting LED lights in a five-star hotel lighting system of claim 1, wherein: be connected with schottky diode D2 and electric capacity C5 between LED drive control chip U1's BLDR pin and the VCC pin, schottky diode D2's negative pole is connected with electric capacity C5's one end electricity, and electric capacity C5's other end ground connection, schottky diode D2's positive pole is connected so that maintain the voltage on LED drive control chip U1 its VCC pin with LED drive control chip U1's BLDR pin electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221364785.7U CN218277202U (en) | 2022-06-02 | 2022-06-02 | Dimming control circuit for adjusting LED lamp in five-star hotel lighting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221364785.7U CN218277202U (en) | 2022-06-02 | 2022-06-02 | Dimming control circuit for adjusting LED lamp in five-star hotel lighting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218277202U true CN218277202U (en) | 2023-01-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221364785.7U Active CN218277202U (en) | 2022-06-02 | 2022-06-02 | Dimming control circuit for adjusting LED lamp in five-star hotel lighting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218277202U (en) |
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2022
- 2022-06-02 CN CN202221364785.7U patent/CN218277202U/en active Active
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