CN110730539A - Silicon controlled rectifier dimming linear non-stroboscopic LED circuit and implementation method thereof - Google Patents
Silicon controlled rectifier dimming linear non-stroboscopic LED circuit and implementation method thereof Download PDFInfo
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Abstract
The invention discloses a silicon controlled linear strobeless LED circuit for dimming, which comprises an input rectifying circuit, a small night light dimming driving circuit, a light-on detection and small night light control circuit and a strobeless LED circuit, wherein the input rectifying circuit is respectively connected with the small night light dimming driving circuit, the light-on detection and the small night light control circuit; the invention also discloses a method for realizing the silicon controlled dimming linear non-stroboscopic LED circuit. The wall-mounted LED lamp is compatible with the lighting effects of a normal lighting mode and a small night lamp mode, is also compatible with two environments of a wall switch or a silicon-controlled light modulator (two functions of light modulation and switching), greatly avoids the diversity of lamp selection of people, extremely low finished products, extremely multiple functions and various enjoyment, and is very convenient to produce, popularize, store and transport.
Description
Technical Field
The invention belongs to the technical field of LED circuits, and particularly relates to a silicon controlled linear non-stroboscopic LED circuit and an implementation method thereof.
Background
With the rapid development of LED electronic products, the living standard of people is improved, the pursuit of material culture and living quality is higher and higher, various LED lamp products are applied more and more in life, and LED lamps, especially intelligent LED lamps, become indispensable lighting products of smart homes in the world nowadays. Because the traditional dimming product is only limited to dimming, the application is single, the practical places are few, the requirements of other use environments and habits cannot be met, and the inconvenience in use is caused.
Disclosure of Invention
The invention aims to provide a silicon controlled linear non-stroboscopic LED circuit for dimming, so as to solve the problems in the background technology. The silicon controlled linear non-stroboscopic LED circuit for dimming has the advantages that silicon controlled dimming can be used, a wall switch or a silicon controlled dimmer switch can be used for switching between a normal mode and a small night lamp mode of an LED lamp, and meanwhile, the LED circuit is compatible with the characteristic that a plurality of LED lamps work simultaneously.
The invention also aims to provide a method for realizing the silicon controlled dimming linear non-stroboscopic LED circuit.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a silicon controlled rectifier linear no stroboscopic LED circuit of adjusting luminance, including input rectifier circuit, little night-light drive circuit that adjusts luminance, turn on light detection and little night-light control circuit and do not have stroboscopic LED circuit, wherein, input rectifier circuit adjusts luminance drive circuit and turns on light detection and little night-light control circuit with little night-light respectively and is connected, turn on light detection and little night-light control circuit adjust luminance drive circuit and do not have stroboscopic LED circuit connection with little night-light respectively, little night-light drive circuit and do not have stroboscopic LED circuit connection of adjusting luminance.
In the invention, the input rectification circuit comprises a rectification bridge DB1, wherein pin 1 of the rectification bridge DB1 is connected with a live line L, pin 3 of the rectification bridge BD1 is grounded, pin 4 of the rectification bridge BD1 is connected with a neutral line N, pin 1 of the rectification bridge BD1 and pin 4 of the rectification bridge BD1 are connected in parallel with a voltage dependent resistor VR1, and pin 2 of the rectification bridge BD1 is connected with a small night lamp dimming drive circuit.
In the present invention, a circuit breaker FR1 is connected between pin 1 of the rectifier bridge DB1 and the live line L.
Further, the small night light dimming driving circuit comprises a diode D2, a resistor R8 and a capacitor C1, wherein one end of the diode D2 is connected with the 2-pin of the rectifier bridge BD1, the other end of the diode D2 is connected with a resistor R8, two ends of the resistor R8 are connected with the capacitor C1 in parallel, one end of the capacitor C1 is connected with an LED, and the other end of the capacitor C1 is connected with a light-on detection and small night light control circuit and a non-stroboscopic LED circuit.
In the present invention, the small night light dimming driving circuit further includes a chip U1, pin 1 of the chip U1 is connected to a resistor R4, the other end of the resistor R4 is connected to a resistor R3, the other end of the resistor R3 is connected to a resistor R2, the other end of the resistor R2 is connected to a resistor R1, the other end of the resistor R1 is connected to pin 2 of the rectifier bridge DB1, pin 2 of the chip U1 is grounded, pin 3 of the chip U1 is connected to a diode D1, the other end of the diode D1 is grounded, pin 2 and pin 3 of the chip U1 are connected in parallel to a resistor R5, and pin 3 of the chip U1 is further connected to the light emission detection and small night light control circuit.
Further, the light-on detection and small night light control circuit comprises a chip U3, wherein a pin 1 of a chip U3 is connected with a capacitor C2, a pin 2 of the chip U3 is connected with a capacitor C3, the other ends of the capacitor C2 and the capacitor C3 are both connected with a pin 3 of a chip U1, a pin 3 of the chip U3 is connected with a resistor R7, a pin 4 of the chip U3 is connected with a resistor R6, the other end of the resistor R6 is connected with a pin 3 of a chip U3, the other end of the resistor R7 is respectively connected with a pin 9 of the chip U3 and a pin 3 of the chip U1, a pin 8 of the chip U3 is connected with a resistor R9, the other end of the resistor R9 is connected with a pin 2 of a rectifier bridge DB1, and pins 5 and 6 of the chip U3 are both connected with a non-strobe LED circuit.
In the invention, the non-stroboscopic LED circuit further comprises a chip U2, wherein pin 2 of the chip U2 is connected with an LED, pin 1 of the chip U2 is connected with a capacitor C6, and the other end of the capacitor C6 and pin 3 of the chip U2 are connected with pins 5 and 6 of a chip U3.
Further, pin 1 of the chip U1 is an OUT terminal, pin 2 is a GND terminal, pin 3 is a REXT terminal, pin 1 of the chip U2 is a VC terminal, pin 2 is an OUT terminal, pin 3 is a GND terminal, pin 1 of the chip U3 is a VDD terminal, pin 2 is a VCC terminal, pin 3 is a REXT1 terminal, pin 4 is a REXT2 terminal, pin 5 is an OUT1 terminal, pin 6 is an OUT2 terminal, pin 7 is an NC terminal, pin 8 is a VIN terminal, and pin 9 is a GND terminal.
Further, the method for implementing the silicon controlled linear non-stroboscopic LED circuit comprises the following steps:
the input rectifying circuit is used for converting an alternating current signal into a direct current signal and supplying power to the small night lamp dimming driving circuit, the light-on detection circuit and the small night lamp control circuit;
the small night lamp dimming driving circuit is used for matching with a silicon controlled dimmer to dim and providing constant current output current for the output LED;
the light-on detection and small night lamp control circuit is used for switching on and off detection and controlling output current to achieve switching between two modes, wherein the mode one is a normal illumination mode, and the mode two is a small night lamp mode;
and fourthly, the non-stroboscopic LED circuit carries out text wave removing processing on the output current.
In the invention, the input rectification circuit comprises a rectification bridge DB1, pin 1 of the rectification bridge DB1 is connected with a live wire L, pin 3 of the rectification bridge BD1 is grounded, pin 4 of the rectification bridge BD1 is connected with a neutral wire N, pin 1 of the rectification bridge BD1 and pin 4 of the rectification bridge BD1 are connected in parallel with a piezoresistor VR1, pin 2 of the rectification bridge BD1 is connected with a small night lamp dimming drive circuit, a circuit breaker FR1 is connected between pin 1 of the rectification bridge DB1 and the live wire L, the small night lamp dimming drive circuit comprises a diode D2, a resistor R8 and a capacitor C1, wherein one end of the diode D2 is connected with pin 2 of the rectification bridge BD1, the other end of the diode D2 is connected with a resistor R8, two ends of the resistor R8 are connected in parallel with a capacitor C1, one end of the capacitor C1 is connected with the LED, and the other end of the capacitor C1 is connected with an open light detection circuit and the small night lamp control circuit, the small night lamp dimming driving circuit further comprises a chip U1, a pin 1 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a resistor R4, the other end of the resistor R4 is connected with a pin 2 of a rectifier bridge DB 4, a pin 2 of the chip U4 is grounded, a pin 3 of the chip U4 is connected with a diode D4, the other end of the diode D4 is grounded, the pin 2 and the pin 3 of the chip U4 are connected in parallel with the resistor R4, the pin 3 of the chip U4 is further connected with a light-on detection and small night lamp control circuit, the light-on detection and small night lamp control circuit comprises the chip U4, the pin 1 of the chip U4 is connected with a capacitor C4, the pin 2 of the chip U4 is connected with a capacitor C4, the other ends of the capacitor C4 and the resistor R4 are connected with the pin 3 of the chip U4, the chip R4, the other end of the chip U4 is connected with the resistor R4, the chip R4 and the chip R4 are connected with the, the other end of the resistor R7 is connected with a pin 9 of the chip U3 and a pin 3 of the chip U1 respectively, a pin 8 of the chip U3 is connected with the resistor R9, the other end of the resistor R9 is connected with a pin 2 of the rectifier bridge DB1, pins 5 and 6 of the chip U3 are both connected with a non-stroboscopic LED circuit, the non-stroboscopic LED circuit comprises a chip U2, a pin 2 of the chip U2 is connected with an LED, a pin 1 of the chip U2 is connected with a capacitor C6, the other end of the capacitor C6 and a pin 3 of the chip U2 are both connected with a pin 5 and a pin 6 of the chip U3, a pin 1 of the chip U1 is an OUT end, a pin 2 is a GND end, a pin 3 is a REXT end, a pin 1 of the chip U2 is a VC end, a pin 2 is an OUT end, a pin 3 is a GND end, a pin 1 of the U3 is an OUT end, a pin 2 is a REVCC end, a pin 4 is a REXT end, a pin 5 is a pin 1 end, a pin 587 is an OUT end, and an NC end is an.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, through the combination of the input rectifying circuit, the small night lamp dimming driving circuit, the on-light detection and small night lamp control circuit and the non-stroboscopic LED circuit, the LED circuit with the function of the small night lamp is realized on the linear driving dimming power supply, and the switching between normal illumination and the perfect combination of the small night lamp is realized;
2. the invention realizes the simultaneous dimming with a single lamp and multiple lamps, simultaneously switches modes, and simultaneously dims multiple lamps and has the consistency problem when switching modes (the switches are simultaneously turned on and off, and the lamps are simultaneously turned on and off when dimming);
3. the invention realizes the problem of abnormal flicker of the simultaneous dimming of a plurality of lamps, and the cost is low because of the adoption of linear driving;
4. the wall-mounted LED lamp is compatible with the lighting effects of a normal lighting mode and a small night lamp mode, is also compatible with two environments of a wall switch or a silicon-controlled light modulator (two functions of light modulation and switching), greatly avoids the diversity of lamp selection of people, extremely low finished products, extremely multiple functions and various enjoyment, and is very convenient to produce, popularize, store and transport.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of the architecture of the present invention;
FIG. 3 is a schematic circuit diagram of an input rectification circuit according to the present invention;
FIG. 4 is a schematic circuit diagram of a dimming driving circuit for a small night lamp according to the present invention;
FIG. 5 is a schematic circuit diagram of the on light detection and small night light control circuit of the present invention;
FIG. 6 is a schematic circuit diagram of a non-stroboscopic LED circuit of the present invention;
in the figure: 1. an input rectification circuit; 2. a small night lamp dimming driving circuit; 3. a light-on detection and small night light control circuit; 4. there is no stroboscopic LED circuit.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1-6, the present invention provides the following technical solutions: the utility model provides a silicon controlled rectifier linear no stroboscopic LED circuit of adjusting luminance, including input rectifier circuit 1, little night-light drive circuit 2 of adjusting luminance, open the light and detect and little night-light control circuit 3 and do not have stroboscopic LED circuit 4, wherein, input rectifier circuit 1 adjusts luminance drive circuit 2 and opens the light and detect and little night-light control circuit 3 with little night-light respectively and be connected, it adjusts luminance drive circuit 2 and does not have stroboscopic LED circuit 4 with little night-light respectively to open the light and detect and little night-light control circuit 3 and be connected, little night-light drive circuit 2 is adjusted luminance and is connected with no stroboscopic.
Furthermore, the input rectification circuit 1 comprises a rectification bridge DB1, wherein pin 1 of the rectification bridge DB1 is connected with a live line L, pin 3 of the rectification bridge BD1 is grounded, pin 4 of the rectification bridge BD1 is connected with a neutral line N, pin 1 of the rectification bridge BD1 and pin 4 of the rectification bridge BD1 are connected in parallel with a voltage dependent resistor VR1, and pin 2 of the rectification bridge BD1 is connected with the small night lamp dimming drive circuit 2.
Through adopting above-mentioned technical scheme, turn into the direct current with the alternating current through rectifier bridge DB1, for little night-light drive circuit 2 and the detection of opening light and little night-light control circuit 3 power supply of adjusting luminance.
Further, a circuit breaker FR1 is connected between the pin 1 of the rectifier bridge DB1 and the live line L.
By adopting the technical scheme, the circuit is protected by the circuit breaker FR 1.
Further, little night-light drive circuit 2 that adjusts luminance includes diode D2, resistance R8 and electric capacity C1, wherein, diode D2's one end is connected with rectifier bridge BD 1's 2 feet, diode D2's the other end and resistance R8 are connected, resistance R8's both ends are parallelly connected to have electric capacity C1, electric capacity C1's one end is connected with the LED, electric capacity C1's the other end and the detection of opening light and little night-light control circuit 3 and do not have stroboscopic LED circuit 4.
Further, the small night light dimming driving circuit 2 further includes a chip U1, pin 1 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a resistor R3, the other end of the resistor R3 is connected with a resistor R2, the other end of the resistor R2 is connected with a resistor R1, the other end of the resistor R1 is connected with pin 2 of the rectifier bridge DB1, pin 2 of the chip U1 is grounded, pin 3 of the chip U1 is connected with a diode D1, the other end of the diode D1 is grounded, pin 2 and pin 3 of the chip U1 are connected in parallel with a resistor R5, and pin 3 of the chip U1 is further connected with the light-on detection and small night light control circuit 3.
Through adopting above-mentioned technical scheme, little night-light drive circuit 2 that adjusts luminance is used for matching the silicon controlled rectifier dimmer and adjusts luminance to provide constant current output current for exporting LED.
Further, the light-on detection and small night light control circuit 3 comprises a chip U3, a pin 1 of the chip U3 is connected with a capacitor C2, a pin 2 of the chip U3 is connected with a capacitor C3, the other ends of the capacitor C2 and the capacitor C3 are both connected with a pin 3 of the chip U1, a pin 3 of the chip U3 is connected with a resistor R7, a pin 4 of the chip U3 is connected with a resistor R6, the other end of the resistor R6 is connected with a pin 3 of the chip U3, the other end of the resistor R7 is respectively connected with a pin 9 of the chip U3 and a pin 3 of the chip U1, a pin 8 of the chip U3 is connected with a resistor R9, the other end of the resistor R9 is connected with a pin 2 of a rectifier bridge DB1, and pins 5 and 6 of the chip U3 are both connected with a non-strobe LED circuit 4.
Through sampling above-mentioned technical scheme, turn on light detection and little night-light control circuit 3 and be used for the switch to detect and control output current and reach the switching of two kinds of modes (normal lighting mode, little night-light mode).
Further, the non-stroboscopic LED circuit 4 comprises a chip U2, a pin 2 of the chip U2 is connected to the LED, a pin 1 of the chip U2 is connected to a capacitor C6, and the other end of the capacitor C6 and a pin 3 of the chip U2 are connected to a pin 5 and a pin 6 of the chip U3.
Through adopting above-mentioned technical scheme, no stroboscopic LED circuit 4 goes the text wave to handle to output current.
Further, pin 1 of the chip U1 is an OUT terminal, pin 2 is a GND terminal, pin 3 is a REXT terminal, pin 1 of the chip U2 is a VC terminal, pin 2 is an OUT terminal, pin 3 is a GND terminal, pin 1 of U3 is a VDD terminal, pin 2 is a VCC terminal, pin 3 is a REXT1 terminal, pin 4 is a REXT2 terminal, pin 5 is an OUT1 terminal, pin 6 is an OUT2 terminal, pin 7 is an NC terminal, pin 8 is a VIN terminal, and pin 9 is a GND terminal.
Further, the method for implementing the silicon controlled linear non-stroboscopic LED circuit comprises the following steps:
the input rectification circuit 1 is used for converting an alternating current signal into a direct current signal and supplying power to the small night lamp dimming driving circuit 2 and the light-on detection and small night lamp control circuit 3;
the small night lamp dimming driving circuit 2 is used for matching with a silicon controlled dimmer to dim and providing constant current output current for the output LED;
the light-on detection and small night lamp control circuit 3 is used for switching on and off detection and controlling output current to achieve switching between two modes, wherein the mode one is a normal illumination mode, and the mode two is a small night lamp mode;
and (IV) the non-stroboscopic LED circuit 4 carries out text wave removing processing on the output current.
The model of the chip U1 in the embodiment is SM2082K, which is sold by Ming microelectronics corporation; the chip U2 is model number SM801D, sold by Ming microelectronics, Inc.; chip U3, model number SM2212EK, was sold by Ming microelectronics, Inc.
In summary, the invention realizes the LED circuit with the function of the small night lamp on the linear driving dimming power supply by the combination of the input rectification circuit, the small night lamp dimming driving circuit, the light-on detection and small night lamp control circuit and the non-stroboscopic LED circuit, thereby realizing the perfect combination of the normal illumination and the small night lamp to switch back and forth; the invention realizes the simultaneous dimming with a single lamp and multiple lamps, simultaneously switches modes, and simultaneously dims multiple lamps and has the consistency problem when switching modes (the switches are simultaneously turned on and off, and the lamps are simultaneously turned on and off when dimming); the invention realizes the problem of abnormal flicker when dimming multiple lamps simultaneously, because of linear driving, the price finished product is low, and the invention is compatible with the lighting effects of a normal lighting mode and a small night lamp mode, and is also compatible with two environments of a wall switch or a silicon-controlled dimmer (two functions of dimming and switching), thereby greatly avoiding the diversity of lamp selection of people, extremely low finished product, extremely multiple functions and various enjoyment, and being very convenient for production, popularization, storage and transportation.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a linear stroboscopic LED circuit that does not have of silicon controlled rectifier dimming which characterized in that: including input rectifier circuit (1), little night-light drive circuit (2) of adjusting luminance, turn on light detection and little night-light control circuit (3) and do not have stroboscopic LED circuit (4), wherein, input rectifier circuit (1) is adjusted luminance drive circuit (2) and is turned on light detection and little night-light control circuit (3) with little night-light respectively and be connected, turn on light detection and little night-light control circuit (3) and adjust luminance drive circuit (2) and do not have stroboscopic LED circuit (4) with little night-light respectively and be connected, little night-light drive circuit (2) of adjusting luminance is connected with no stroboscopic LED circuit (4).
2. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 1, wherein: the input rectification circuit (1) comprises a rectification bridge DB1, wherein a pin 1 of the rectification bridge DB1 is connected with a live wire L, a pin 3 of the rectification bridge BD1 is grounded, a pin 4 of the rectification bridge BD1 is connected with a zero wire N, a pin 1 of the rectification bridge BD1 and a pin 4 of the rectification bridge BD1 are connected in parallel with a voltage dependent resistor VR1, and a pin 2 of the rectification bridge BD1 is connected with the small night lamp dimming drive circuit (2).
3. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 2, wherein: a circuit breaker FR1 is connected between the pin 1 of the rectifier bridge DB1 and the live wire L.
4. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 3, wherein: little night-light drive circuit (2) of adjusting luminance includes diode D2, resistance R8 and electric capacity C1, wherein, diode D2's one end is connected with rectifier bridge BD 1's 2 feet, diode D2's the other end is connected with resistance R8, resistance R8's both ends are parallelly connected to have electric capacity C1, electric capacity C1's one end is connected with LED, electric capacity C1's the other end and the detection of opening a light and little night-light control circuit (3) and do not have stroboscopic LED circuit (4).
5. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 4, wherein: the small night lamp dimming driving circuit (2) further comprises a chip U1, a pin 1 of the chip U1 is connected with a resistor R4, the other end of the resistor R4 is connected with a resistor R3, the other end of the resistor R3 is connected with a resistor R2, the other end of the resistor R2 is connected with a resistor R1, the other end of the resistor R1 is connected with a pin 2 of a rectifier bridge DB1, a pin 2 of the chip U1 is grounded, a pin 3 of the chip U1 is connected with a diode D1, the other end of the diode D1 is grounded, a pin 2 and a pin 3 of the chip U1 are connected with a resistor R5 in parallel, and a pin 3 of the chip U1 is further connected with a light-on detection and small night lamp control circuit (3).
6. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 5, wherein: the control circuit (3) for the light-emitting detection and the small night lamp comprises a chip U3, wherein a pin 1 of a chip U3 is connected with a capacitor C2, a pin 2 of the chip U3 is connected with a capacitor C3, the other ends of the capacitor C2 and a capacitor C3 are connected with a pin 3 of a chip U1, a pin 3 of the chip U3 is connected with a resistor R7, a pin 4 of the chip U3 is connected with a resistor R6, the other end of the resistor R6 is connected with a pin 3 of a chip U3, the other end of the resistor R7 is respectively connected with a pin 9 of the chip U3 and a pin 3 of the chip U1, a pin 8 of the chip U3 is connected with a resistor R9, the other end of the resistor R9 is connected with a pin 2 of a rectifier bridge DB1, and a pin 5 and a pin 6 of the chip U3 are both connected with a non-.
7. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 6, wherein: the non-stroboscopic LED circuit (4) comprises a chip U2, wherein a pin 2 of the chip U2 is connected with an LED, a pin 1 of the chip U2 is connected with a capacitor C6, and the other end of the capacitor C6 and a pin 3 of the chip U2 are connected with a pin 5 and a pin 6 of a chip U3.
8. The thyristor-dimmed linear non-stroboscopic LED circuit of claim 7, wherein: the chip U1's 1 foot is the OUT end, 2 feet are the GND end, 3 feet are the REXT end, chip U2's 1 foot is the VC end, 2 feet are the OUT end, 3 feet are the GND end, U3's 1 foot is the VDD end, 2 feet are the VCC end, 3 feet are the REXT1 end, 4 feet are the REXT2 end, 5 feet are the OUT1 end, 6 feet are the OUT2 end, 7 feet are the NC end, 8 feet are the VIN end, 9 feet are the GND end.
9. The method for implementing the scr dimmable linear non-stroboscopic LED circuit of any one of claims 1 to 8, comprising the steps of:
the input rectification circuit (1) is used for converting an alternating current signal into a direct current signal and supplying power to the small night lamp dimming driving circuit (2) and the light-on detection and small night lamp control circuit (3);
the small night lamp dimming driving circuit (2) is used for matching with a silicon controlled dimmer to dim and providing constant current output current for the output LED;
the light-on detection and small night lamp control circuit (3) is used for switching between two modes, namely a normal illumination mode and a small night lamp mode, by switching on and off detection and controlling output current;
and fourthly, the non-stroboscopic LED circuit (4) carries out text wave removing processing on the output current.
10. The method of claim 9, wherein the method comprises: the input rectification circuit (1) comprises a rectification bridge DB1, a pin 1 of a rectification bridge DB1 is connected with a live wire L, a pin 3 of a rectification bridge BD1 is grounded, a pin 4 of a rectification bridge BD1 is connected with a neutral wire N, a pin 1 of a rectification bridge BD1 is connected with a pin 4 of a rectification bridge BD1 in parallel to a piezoresistor VR1, a pin 2 of a rectification bridge BD1 is connected with a small night lamp dimming drive circuit (2), a breaker 1 is connected between the pin 1 of the rectification bridge DB1 and the live wire L, the small night lamp dimming drive circuit (2) comprises a diode D2, a resistor R8 and a capacitor C1, wherein one end of the diode D2 is connected with a pin 2 of the rectification bridge BD1, the other end of the diode D8 is connected with a pin 2 of the rectification bridge BD 2, two ends of the resistor R8 are connected with a capacitor C1 in parallel, one end of the capacitor C5 is connected with an LED, the other end of the capacitor C1 is connected with an opening light detection and a small night lamp control circuit (3) and a non-stroboscopic light control circuit (U584), pin 1 of chip U1 is connected with resistor R4, the other end of resistor R4 is connected with resistor R3, the other end of resistor R3 is connected with resistor R2, the other end of resistor R2 is connected with resistor R2, the other end of resistor R2 is connected with pin 2 of rectifier bridge DB 2, pin 2 of chip U2 is grounded, pin 3 of chip U2 is connected with diode D2, the other end of diode D2 is grounded, pin 2 and pin 3 of chip U2 are connected in parallel with resistor R2, pin 3 of chip U2 is also connected with light-on detection and small night lamp control circuit (3), light-on detection and small night lamp control circuit (3) comprises chip U2, pin 1 of chip U2 is connected with capacitor C2, pin 2 of chip U2 is connected with capacitor C2, the other ends of capacitor C2 and capacitor C2 are connected with pin 3 of chip U2, the other end of chip U2 is connected with resistor R2 and the other end of resistor R2 is connected with chip R2 and the other end of chip U2, the other end of the resistor R7 is connected with a pin 9 of the chip U3 and a pin 3 of the chip U1 respectively, a pin 8 of the chip U3 is connected with the resistor R9, the other end of the resistor R9 is connected with a pin 2 of the rectifier bridge DB1, pins 5 and 6 of the chip U3 are connected with the non-stroboscopic LED circuit (4), the non-stroboscopic LED circuit (4) comprises a chip U2, a pin 2 of the chip U2 is connected with the LED, a pin 1 of the chip U2 is connected with the capacitor C6, the other end of the capacitor C6 and a pin 3 of the chip U2 are connected with a pin 5 and a pin 6 of the chip U3, a pin 1 of the chip U1 is an OUT end, a pin 2 is a GND end, a pin 3 is a REXT end, a pin 1 of the chip U2 is a VC end, a pin 2 is an OUT end, a pin 3 is an OUT end, a pin is a pin 3 is an XT end, a pin 3 is a pin 5, a pin 5 is an NC end, a pin 587 is an OUT end, a pin is an NC end is an OUT end, and an OUT end is an OUT end 24.
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Application publication date: 20200124 |