Five-in-one dimming stroboflash-free constant current power supply circuit

Abstract

The utility model discloses a five-in-one dimming stroboflash-free constant-current power supply circuit, which comprises an EMI circuit, one input end of the EMI circuit is connected with commercial power, the output end of the EMI circuit is coupled with the input end of a rectifying circuit, and the rectifying circuit is used for converting input alternating-current commercial power into direct-current power; and the output end of the rectifying circuit is coupled with the input end of the single-stage PFC flyback circuit through the active and passive bleeder circuit. According to the invention, the active and passive bleeder circuit can ensure that the minimum holding current of the silicon controlled knob is not turned off by mistake; one-stage DC-DC is output to realize a wide output voltage range; the single-chip microcomputer detects the voltage of the silicon controlled rectifier knob after phase cutting or 0 / 1-10V connected with the DIM + and the DIM-, the adjustable resistor and the PWM signal which are converted into a dimming signal. The circuit has the advantages that the circuit is compatible with most front-cut and back-cut silicon controlled rectifier dimming knobs, 0 / 1-10V dimmers, adjustable resistors, PWM dimming and 9-45V output voltage ranges, and the dimming process is smooth and free of stroboflash.

Description

TECHNICAL FIELD

[0001] The utility model relates to LED drive circuit technical field especially relates to a kind of LED thyristor;0 / 1-10V, adjustable resistance, PWM dimming no flicker constant-current power supply circuit. BACKGROUND

[0002] LED lighting needs more and more to do brightness control (dimming). Phase-cut dimming is a kind of traditional light source (incandescent lamp, resistive load) dimming mode, the size of output voltage is controlled by the phase angle of input voltage, low cost, wiring is convenient, and is widely used. But when accessing LED power supply (capacitive load), it will cause various lamp flashes, insufficient dimming depth, non-smooth dimming curve and other compatibility problems. A special chip scheme appears in the prior art, which can automatically detect the type of input dimmer and is compatible with multiple dimmers. 0-10V dimming is a method of controlling light brightness through analog DC voltage signal, and its principle is that 0-10V dimmer or 1-10V, adjustable resistance, PWM dimming control system outputs a DC voltage signal in the range of 0V to 10V to 0-10V dimming drive, so as to realize dimming control. Specifically, the greater the voltage signal output by the dimmer, the greater the current in the dimming drive, resulting in brighter light; on the contrary, the smaller the voltage signal output by the dimmer, the smaller the current in the dimming drive, and the darker the light, until the output dimming signal voltage becomes 0, the lamp is turned off. The advantages of this dimming method include accurate dimming, strong compatibility and easy maintenance. But because it is a single-stage scheme, the low-end ripple of output current is large, and the dimming depth is also difficult to break through 1%.

[0003] Therefore, we propose a kind of LED thyristor;0 / 1-10V, adjustable resistance, PWM dimming no flicker constant-current power supply circuit. CONTENT OF THE UTILITY MODEL

[0004] In view of the deficiencies of the prior art, the utility model provides a five-in-one dimming no flicker constant-current power supply circuit to solve the technical problems in the prior art.

[0005] To achieve the above purpose, the utility model is realized by the following technical scheme:

[0006] A five-in-one dimming no flicker constant-current power supply circuit: an input end of EMI circuit is connected to mains, the output end of EMI circuit is coupled with the input end of rectifier circuit, and the rectifier circuit is used to convert input AC mains into DC;

[0007] The output end of the rectifier circuit is coupled with the input end of a single-stage PFC flyback circuit through an active or passive bleed circuit, the output end of the single-stage PFC flyback circuit is coupled with the primary of an isolation transformer, the single-stage PFC flyback circuit is used to generate an 80-90 KHz high-frequency PWM signal, and control the turn-on and turn-off of MOS in the isolation transformer;

[0008] The secondary of the isolation transformer is coupled with the input end of a DC constant voltage power supply, the DC constant voltage power supply is used to convert the power supply into a constant current output power supply;

[0009] One output end of the DC constant voltage power supply is coupled with the input end of a BUCK constant current adjustable light circuit, the other output end of the DC constant voltage power supply is coupled with the feedback input end of the single-stage PFC flyback circuit through a feedback loop, the output end of the BUCK constant current adjustable light circuit is coupled with the power input end of an LED lighting device, the other output end of the EMI circuit is coupled with the input end of a thyristor cutting signal circuit,

[0010] The output end of the thyristor cutting signal or the 0 / 1-10V, adjustable resistance, PWM converted to a dimming signal input end of a single-chip microcomputer control circuit coupled with DIM+, DIM- is connected, the single-chip microcomputer control circuit is coupled with the input end of a dimming foot control circuit, the output end of the dimming foot control circuit is coupled with the control end of the BUCK constant current adjustable light circuit.

[0011] As the preferred technical scheme of the utility model, the input end of the constant current power supply circuit is coupled with the chip BD101 in sequence through the inductor LF01 and the inductor LF02, the resistor R100 and the capacitor CX102 are connected in series and then are connected in parallel with the input end of the chip BD101, the resistor R101 and the resistor R102 are connected in series and then are connected in parallel with the input end of the chip BD101, the capacitor CX101 is connected in parallel with the input end of the chip BD101, the potentiometer RV102 is connected in parallel with the input end of the chip BD101, the positive pole of the output end of the chip BD101 is divided into three paths, the first path is connected with the joint of the resistor R110 and the resistor R107, the second path is connected with the joint of the resistor R103 and the capacitor C101, the third path is coupled with one end of the resistor R125, the other end of the resistor R125 is divided into three paths through the resistor R126, the first path is coupled with the negative pole of the chip BD101 through the resistor R127, the second path is coupled with the base of the triode Q104, the third path is coupled with the positive pole of the diode D105, the negative pole of the D105 is divided into three paths, the first path is coupled with one end of the resistor R129, the second path is coupled with the emitter of the triode Q104 through the resistor R128, the third path is coupled with the negative pole of the chip BD101 through the capacitor C111, the collector of the triode Q104 is coupled with the negative pole of the chip BD101, the other end of the resistor R129 is divided into three paths, the first path is grounded through the capacitor C122, the second path is grounded through the diode DZ102, and the third path is coupled with the gate of the field effect tube Q103.

[0012] As the preferred technical scheme of the utility model, the other end of the resistor R103 is divided into five paths, the first path is grounded through the capacitor C102, the second path is grounded in sequence through the resistor R132A and the capacitor C100, the resistor R132 is connected in parallel with the resistor R132A, the third path is coupled with the negative pole of the diode D101 through the capacitor C103, the fourth path is coupled with the negative pole of the diode D101 in sequence through the resistor R106A, the resistor R106B and the resistor R106C are connected in parallel, the fifth path is coupled with the transformer T100-A.

[0013] As the preferred technical scheme of the utility model, the second path of the chip BD101 positive output end is divided into two paths, the first path is sequentially coupled with the chip IC100 through the resistance R110 and the resistance R111, the second path is sequentially grounded through the resistance R107A, the resistance R107, the resistance R108 and the capacitor E103, the 3-pin of the chip IC100 is divided into two paths, the first path is grounded through the resistance R113, the second path is grounded through the capacitor C110, the 6-pin of the chip IC100 is grounded, the 4-pin of the chip IC100 is divided into six paths, the first path is coupled with one end of the resistance R118, the second path is grounded through the resistance RS104, the third path is grounded through the resistance RS101, the fourth path is grounded through the resistance RS102, the fifth path is grounded through the resistance RS103, the sixth path is coupled with the source of the field effect transistor Q101, the other end of the resistance R118 is divided into two paths, the first path is coupled with the gate of the field effect transistor Q101, the second path is coupled with the 7-pin of the chip IC100 through the resistance R117, the diode D103 is connected in parallel with the resistance R117, the drain of the field effect transistor Q101 is coupled with the 1-pin and the 3-pin of the T100-A; the 2-pin of the chip IC100 is divided into two paths, the first path is coupled with the 1-pin of the chip IC100 through the resistance R123, the second path is coupled with one end of the capacitor C109 through the resistance R124, the other end of the capacitor C109 is divided into three paths, the first path is connected with the power supply VCC through the resistance R120, the second path is coupled with the 1-pin of the chip IC100, the third path is sequentially grounded through the resistance R121 and the resistance R122; the 5-pin of the chip IC100 is coupled with the transformer T100-A through the resistance R115.

[0014] As the preferred technical scheme of the utility model, the 8-pin of the chip IC100 is divided into five paths, the first path is coupled with the power supply VCC, the second path is grounded through the capacitor C105, the third path is grounded through the capacitor E103, the fourth path is coupled with the emitter of the triode Q102 through the reverse diode D104, the fifth path is coupled at the intermediate node between the capacitor E103 and the resistance R108, the emitter of the triode Q102 is divided into three paths, the first path is coupled with the base of the triode Q102 through the resistance R119, the second path is grounded through the capacitor E104, the third path is sequentially coupled with the 6-pin of the transformer T100-A through the resistance R104, the capacitor C106 and the resistance R105;

[0015] As a preferred embodiment of this utility model, pin 9 of the transformer T100-A is divided into seven paths after passing through diode D201. The first path is grounded through capacitor E203, the second path is grounded through capacitor E204, the third path is grounded through capacitor E202, the fourth path is grounded through resistor R204, the fifth path is grounded through resistor R205, the sixth path is coupled to a 50V power supply, and the seventh path is coupled to one end of resistor R212. The other end of resistor R212 is divided into four paths. The first path is coupled to one input terminal of optocoupler PC100-A through capacitor C210, the second path is coupled to capacitor C211, ... Resistor R217 is coupled to one input terminal of optocoupler PC100-A, the third path is coupled to the control terminal of controllable diode U201, the fourth path is grounded through resistor R210, and resistor R211 is connected in parallel with resistor R210; the positive terminal of controllable diode U201 is divided into five paths: the first path is coupled to the 21V output terminal through resistor R206, the second path is coupled to the 21V output terminal through capacitor E205, the third path is coupled to the positive terminal of diode DZ201, the fourth path is coupled to the collector of transistor Q201 through capacitor E201, and the fifth path is coupled to pin 12 of T100-A;

[0016] As a preferred embodiment of this utility model, the 50V power output terminal is divided into six paths. The first path is coupled to pin 4 of switch SW301 via resistor RI305, the second path is coupled to pin 5 of switch SW301 via resistor RI304, the third path is coupled to pin 6 of switch SW301 via resistor RI303, the fourth path is coupled to one input terminal of common-mode inductor LF301 via resistor RI302, the fifth path is coupled to one input terminal of common-mode inductor LF301 via resistor RI301, and the sixth path is coupled to pin 1 of chip U301. Pin 4 of chip U301 is grounded, and pin 5 of chip U301 is coupled to the gate of field-effect transistor Q301 via resistor R304. The two output terminals of common-mode inductor LF301 are power output terminals, and pin 3 of chip U301 is the microcontroller dimming CCR signal input terminal.

[0017] This utility model provides a five-in-one dimming flicker-free constant current power supply circuit, which has the following beneficial effects:

[0018] This application features an active and passive discharge circuit that ensures the minimum holding current of the SCR knob is maintained to prevent accidental turn-off; a single-stage DC-DC output enables a wide output voltage range; a microcontroller detects the voltage after the SCR knob is phase-cut, or either DIM+, DIM- (connected to 0 / 1-10V), an adjustable resistor, and converts PWM dimming to a dimming signal; the program controls the output of PWM or DC voltage to achieve low dimming brightness and flicker-free dimming. The advantages of this circuit are: compatibility with most pre- and post-cut SCR dimming knobs, an output voltage range of 9-45V, smooth and flicker-free dimming, and a dimming range of 0.1%-100%. Attached Figure Description

[0019] Figure 1 is the principle block diagram of the power supply circuit according to the embodiment of the present application;

[0020] Figure 2 is the principle diagram of the power supply circuit according to the embodiment of the present application. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0022] As shown in Figure 1 A five-in-one dimming no-flicker constant current power supply circuit: including an EMI circuit, one input end of the EMI circuit is connected to the mains, the output end of the EMI circuit is coupled with the input end of a rectifier circuit, the rectifier circuit is used to convert the input AC mains into DC;

[0023] The output end of the rectifier circuit is coupled with the input end of a single-stage PFC flyback circuit through an active or passive bleeder circuit, the output end of the single-stage PFC flyback circuit is coupled with the primary of an isolation transformer, the single-stage PFC flyback circuit is used to generate an 80-90KHz high-frequency PWM signal and control the conduction and turn-off of MOS in the isolation transformer, then the high-voltage DC is chopped and transmitted to the secondary through the transformer coupling, providing a stable DC constant voltage power supply for the BUCK constant current circuit of the secondary; the secondary of the isolation transformer is coupled with the input end of a DC constant voltage power supply, the DC constant voltage power supply is used to convert the power supply into a constant current output power supply;

[0024] One output end of the DC constant voltage power supply is coupled with the input end of a BUCK constant current adjustable light circuit, the other output end of the DC constant voltage power supply is coupled with the feedback input end of the single-stage PFC flyback circuit through a feedback loop, the output end of the BUCK constant current adjustable light circuit is coupled with the power input end of an LED lighting device, the other output end of the EMI circuit is coupled with the input end of a thyristor chopping signal circuit,

[0025] The output end of the thyristor chopping signal or 0 / 1-10V, adjustable resistance, PWM converted to dimming signal coupled with the signal input end of a single-chip microcomputer control circuit, the single-chip microcomputer control circuit is coupled with the input end of a dimming foot control circuit, the output end of the dimming foot control circuit is coupled with the control end of the BUCK constant current adjustable light circuit.

[0026] As shown in Figure 1As shown, 120V AC voltage is obtained from the mains, passes through a thyristor phase-cutting circuit (thyristor knob) and an EMI circuit, and then is converted into DC voltage by a rectifier circuit to supply a single-stage PFC flyback circuit. Meanwhile, active and passive bleed circuits are working to prevent the lamp from flashing caused by the thyristor knob being mistakenly turned off. The single-stage PFC flyback circuit generates an 80-90KHz high-frequency PWM signal to control the on and off of the MOS, and the high-voltage DC is chopped and then coupled to the secondary side by a transformer. The secondary-side BUCK constant-current adjustable light circuit is provided with a stable DC constant-voltage power supply. The BUCK constant-current adjustable light circuit converts the DC constant-voltage power supply into a constant-current output power supply. The single-chip microcomputer control circuit checks the signal after the thyristor phase-cutting and then processes it, and outputs a mixed signal of PWM and DC voltage to change the voltage of the light-adjusting pin of the BUCK constant-current adjustable light circuit to control the output current. The voltage of the LED lamp can be smoothly adjusted from 9V to 45V DC, and the light-adjusting range can reach 0.1%-100%.

[0027] Further, as shown in Figure 2 the input end of the constant-current power supply circuit is coupled with the input end of a rectifier chip BD101 in sequence via an inductor LF01 and an inductor LF02, a resistor R100 and a capacitor CX102 are connected in series and then are connected in parallel with the input end of the chip BD101, a resistor R101 and a resistor R102 are connected in series and then are connected in parallel with the input end of the chip BD101, a capacitor CX101 is connected in parallel with the input end of the chip BD101, a potentiometer RV102 is connected in parallel with the input end of the chip BD101, the positive electrode of the output end of the chip BD101 is divided into three paths, the first path is connected to the joint of a resistor R110 and a resistor R107, the second path is connected to the joint of a resistor R103 and a capacitor C101, and the third path is coupled with one end of a resistor R125, the other end of the resistor R125 is divided into three paths via a resistor R126, the first path is coupled with the negative electrode of the chip BD101 via a resistor R127, the second path is coupled with the base electrode of a triode Q104, and the third path is coupled with the positive electrode of a diode D105, the negative electrode of the diode D105 is divided into three paths, the first path is coupled with one end of a resistor R129, the second path is coupled with the emitter electrode of the triode Q104 via a resistor R128, and the third path is coupled with the negative electrode of the chip BD101 via a capacitor C111, the collector electrode of the triode Q104 is coupled with the negative electrode of the chip BD101, and the other end of the resistor R129 is divided into three paths, the first path is connected to ground via a capacitor C122, the second path is connected to ground via a diode DZ102, and the third path is coupled with the gate electrode of a field effect transistor Q103.

[0028] The other end of the resistor R103 is divided into five paths, the first path is grounded through the capacitor C102, the second path is grounded through the resistor R132A and the capacitor C100 in turn, the resistor R132 is connected in parallel with the resistor R132A, the third path is coupled with the negative electrode of the diode D101 through the capacitor C103, the fourth path is coupled with the negative electrode of the diode D101 through the resistor R106A and the resistor R106B in turn, the resistor R106 is connected in parallel with the resistor R106A, the resistor R106B is connected in parallel with the resistor R106C, and the fifth path is coupled with the 1 pin of the transformer T100-A;

[0029] The second path of the positive electrode output end of the chip BD101 is divided into two paths, the first path is coupled with the chip IC100 through the resistor R110 and the resistor R111 in turn, and the second path is grounded through the resistor R107A, the resistor R107, the resistor R108 and the capacitor E103 in turn, the 3 pin of the chip IC100 is divided into two paths, the first path is grounded through the resistor R113, and the second path is grounded through the capacitor C110, the 6 pin of the chip IC100 is grounded, the 4 pin of the chip IC100 is divided into six paths, the first path is coupled with one end of the resistor R118, the second path is grounded through the resistor RS104, the third path is grounded through the resistor RS101, the fourth path is grounded through the resistor RS102, the fifth path is grounded through the resistor RS103, and the sixth path is coupled with the source electrode of the field effect tube Q101, the other end of the resistor R118 is divided into two paths, the first path is coupled with the gate electrode of the field effect tube Q101, and the second path is coupled with the 7 pin of the chip IC100 through the resistor R117, the diode D103 is connected in parallel with the resistor R117, the drain electrode of the field effect tube Q101 is coupled with the 1 pin of the transformer T100-A, and the 3 pin is coupled with the 1 pin of the transformer T100-A; the 2 pin of the chip IC100 is divided into two paths, the first path is coupled with the 1 pin of the chip IC100 through the resistor R123, and the second path is coupled with one end of the capacitor C109 through the resistor R124, the other end of the capacitor C109 is divided into three paths, the first path is connected to the power supply VCC through the resistor R120, the second path is coupled with the 1 pin of the chip IC100, and the third path is grounded through the resistor R121 and the resistor R122 in turn; the 5 pin of the chip IC100 is coupled with the transformer T100-A through the resistor R115;

[0030] The 8 pin of the chip IC100 is divided into five paths, the first path is coupled with the power supply VCC, the second path is grounded through the capacitor C105, the third path is grounded through the capacitor E103, the fourth path is coupled with the emitter electrode of the triode Q102 through the reverse diode D104, and the fifth path is coupled at the intermediate node between the capacitor E103 and the resistor R108, the emitter electrode of the triode Q102 is divided into three paths, the first path is coupled with the base electrode of the triode Q102 through the resistor R119, the second path is grounded through the capacitor E104, and the third path is coupled with the 6 pin of the transformer T100-A through the resistor R104, the capacitor C106 and the resistor R105 in turn;

[0031] The 9-pin of the transformer T100-A is divided into seven ways through the diode D201, the first way is grounded through the capacitor E203, the second way is grounded through the capacitor E204, the third way is grounded through the capacitor E202, the fourth way is grounded through the resistor R204, the fifth way is grounded through the resistor R205, the sixth way is connected to the 50V power output terminal, and the seventh way is connected to one end of the resistor R212, the other end of the resistor R212 is divided into four ways, the first way is connected to one input terminal of the optocoupler PC100-A through the capacitor C210, the second way is connected to one input terminal of the optocoupler PC100-A through the capacitor C211, the resistor R217 in sequence, the third way is connected to the control terminal of the controllable diode U201, the fourth way is grounded through the resistor R210, and the resistor R211 is connected in parallel with the resistor R210; the anode of the controllable diode U201 is divided into five ways, the first way is connected to the 21V output terminal through the resistor R206, the second way is connected to the 21V output terminal through the capacitor E205, the third way is connected to the anode of the diode DZ201, the fourth way is connected to the collector of the triode Q201 through the capacitor E201, and the fifth way is connected to the 12-pin of the T100-A;

[0032] The 50V power output terminal is divided into six ways, the first way is connected to the 4-pin of the switch SW301 through the resistor RI305, the second way is connected to the 5-pin of the switch SW301 through the resistor RI304, the third way is connected to the 6-pin of the switch SW301 through the resistor RI303, the fourth way is connected to one input terminal of the common-mode inductor LF301 through the resistor RI302, the fifth way is connected to one input terminal of the common-mode inductor LF301 through the resistor RI301, and the sixth way is connected to the 1-pin of the chip U301, the 4-pin of the chip U301 is grounded, the 5-pin of the chip U301 is connected to the gate of the field effect tube Q301 through the resistor R304, the two output terminals of the common-mode inductor LF301 are power output terminals, and the 3-pin of the chip U301 is a single-chip microcomputer dimming CCR signal input terminal.

[0033] As shown in Figure 2 When the 120Vac mains is turned on, the constant voltage of 50VDC output by the transformer is supplied to the "BUCK constant current adjustable light circuit" through the safety and EMI circuit components, the rectifier circuit, the active and passive bleeder circuit, the single-stage PFC flyback circuit, and the voltage is detected by the voltage dividing resistors of the resistor R210, the resistor R211 and the resistor R212 to control the voltage to always maintain 50VDC;

[0034] At this time, the BUCK constant current adjustable light circuit starts to work, the single-chip microcomputer circuit MO1 detects the voltage after the phase cutting of the thyristor knob or 0 / 1-10V input by DIM+, DIM-, adjustable resistor, PWM dimming conversion to dimming signal, and outputs the CCR mixed signal of PWM and direct current voltage after the single-chip microcomputer processing, controls the voltage of the 3-pin of the BUCK constant current chip U301, realizes the control of the size of the output current, and thus accurately changes the brightness of the LED lamp.

[0035] The active and passive discharge circuits are used to prevent LED lamp flickering, because the thyristor dimmer needs to hold the current after the phase cutting triggering, and needs to maintain the current during the conduction period after the triggering, if the two currents cannot be met, the thyristor dimmer will appear mis-triggering and LED lighting flickering, and the principle of the capacitor C100, the resistor R131, the resistor R132 and the resistor R132A is to provide the minimum maintenance current when the thyristor phase cutting is conducted, so as to ensure that the thyristor knob will not be mis-disconnected.

[0036] After normal operation, the voltage of the single-stage PFC flyback chip IC100, the BUCK constant current chip U301 and the single-chip microcomputer control circuit MO1 is separately supplied by the VCC winding of the transformer T100, in order to ensure the stable operation of each VCC under wide working conditions, the linear voltage stabilizing circuit is added to each VCC, so as to ensure the stable power supply of the thyristor dimmer in various dimming states, and realize the smooth dimming without flickering.

[0037] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited to this, any skilled person in the technical field can easily think of various equivalent modifications or replacements within the technical range disclosed by the present application, and these modifications or replacements should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A five-in-one dimming flicker-free constant current power supply circuit, characterized in that: The EMI circuit has one input end connected with the mains, and the output end of the EMI circuit is connected with the input end of a rectifier circuit, which is used to convert the input AC mains into DC; The output end of the rectifier circuit is connected with the input end of a single-stage PFC flyback circuit through an active or passive bleeder circuit, the output end of the single-stage PFC flyback circuit is connected with the primary of an isolation transformer, and the single-stage PFC flyback circuit is used to generate an 80-90 KHz high-frequency PWM signal and control the on and off of the MOS in the isolation transformer; The secondary of the isolation transformer is connected with the input end of a DC constant-voltage power supply, which is used to convert the power supply into a constant-current output power supply; One output end of the DC constant-voltage power supply is connected with the input end of a BUCK constant-current adjustable light circuit, another output end of the DC constant-voltage power supply is connected with the feedback input end of the single-stage PFC flyback circuit through a feedback loop, the output end of the BUCK constant-current adjustable light circuit is connected with the power input end of an LED lighting device, and another output end of the EMI circuit is connected with the input end of a thyristor cut-off signal circuit; The output end of the thyristor cut-off signal circuit or the 0 / 1-10V, adjustable resistor, PWM converted into a dimming signal connected with the signal input end of a single-chip microcomputer control circuit, the single-chip microcomputer control circuit is connected with the input end of a dimming foot control circuit, and the output end of the dimming foot control circuit is connected with the control end of the BUCK constant-current adjustable light circuit.

2. A five-in-one dimmable constant current power supply circuit without frequency flash as claimed in claim 1, characterized in that: The input end of the constant-current power supply circuit is connected with a chip BD101 through an inductor LF01 and an inductor LF02 in sequence, a resistor R100 and a capacitor CX102 are connected in series and then connected in parallel with the input end of the chip BD101, a resistor R101 and a resistor R102 are connected in series and then connected in parallel with the input end of the chip BD101, a capacitor CX101 is connected in parallel with the input end of the chip BD101, a potentiometer RV102 is connected in parallel with the input end of the chip BD101, the positive electrode of the output end of the chip BD101 is divided into three paths, the first path is connected with the joint of a resistor R110 and a resistor R107, the second path is connected with the joint of a resistor R103 and a capacitor C101, and the third path is connected with one end of a resistor R125, the other end of the resistor R125 is divided into three paths through a resistor R126, the first path is connected with the negative electrode of the chip BD101 through a resistor R127, the second path is connected with the base of a triode Q104, and the third path is connected with the positive electrode of a diode D105, the negative electrode of the diode D105 is divided into three paths, the first path is connected with one end of a resistor R129, the second path is connected with the emitter of the triode Q104 through a resistor R128, and the third path is connected with the negative electrode of the chip BD101 through a capacitor C111, the collector of the triode Q104 is connected with the negative electrode of the chip BD101, and the other end of the resistor R129 is divided into three paths, the first path is connected with the ground through a capacitor C122, the second path is connected with the ground through a diode DZ102, and the third path is connected with the gate of a field effect transistor Q103.

3. A five-in-one dimming, stroboscopic-free, constant current power supply circuit as claimed in claim 2, characterized in that: The other end of the resistor R103 is divided into five paths, the first path is grounded through the capacitor C102, the second path is grounded through the resistor R132A and the capacitor C100 in turn, the resistor R132 is connected in parallel with the resistor R132A, the third path is coupled with the negative electrode of the diode D101 through the capacitor C103, the fourth path is coupled with the negative electrode of the diode D101 through the resistor R106A and the resistor R106B in turn, the resistor R106 is connected in parallel with the resistor R106A, the resistor R106B is connected in parallel with the resistor R106C, and the fifth path is coupled with the transformer T100-A.

4. A five-in-one dimming, stroboscopic-free, constant current power supply circuit as claimed in claim 3, characterized in that, The second path of the positive electrode output end of the chip BD101 is divided into two paths, the first path is coupled with the chip IC100 through the resistor R110 and the resistor R111 in turn, and the second path is grounded through the resistor R107A, the resistor R107, the resistor R108 and the capacitor E103 in turn, the 3-pin of the chip IC100 is divided into two paths, the first path is grounded through the resistor R113, and the second path is grounded through the capacitor C110, the 6-pin of the chip IC100 is grounded, the 4-pin of the chip IC100 is divided into six paths, the first path is coupled with one end of the resistor R118, the second path is grounded through the resistor RS104, the third path is grounded through the resistor RS101, the fourth path is grounded through the resistor RS102, the fifth path is grounded through the resistor RS103, and the sixth path is coupled with the source electrode of the field effect tube Q101, the other end of the resistor R118 is divided into two paths, the first path is coupled with the gate electrode of the field effect tube Q101, and the second path is coupled with the 7-pin of the chip IC100 through the resistor R117, the diode D103 is connected in parallel with the resistor R117, the drain electrode of the field effect tube Q101 is coupled with the 1-pin of the transformer T100-A and the 3-pin; the 2-pin of the chip IC100 is divided into two paths, the first path is coupled with the 1-pin of the chip IC100 through the resistor R123, and the second path is coupled with one end of the capacitor C109 through the resistor R124, the other end of the capacitor C109 is divided into three paths, the first path is connected to the power supply VCC through the resistor R120, the second path is coupled with the 1-pin of the chip IC100, and the third path is grounded through the resistor R121 and the resistor R122 in turn; the 5-pin of the chip IC100 is coupled with the transformer T100-A through the resistor R115.

5. A five-in-one dimmable flashless constant current power supply circuit as claimed in claim 4, characterized in that, The 8-pin of the chip IC100 is divided into five paths, the first path is coupled with the power supply VCC, the second path is grounded through the capacitor C105, the third path is grounded through the capacitor E103, the fourth path is coupled with the emitter electrode of the triode Q102 through the reverse diode D104, and the fifth path is coupled at the intermediate node between the capacitor E103 and the resistor R108, the emitter electrode of the triode Q102 is divided into three paths, the first path is coupled with the base electrode of the triode Q102 through the resistor R119, the second path is grounded through the capacitor E104, and the third path is coupled with the 6-pin of the transformer T100-A through the resistor R104, the capacitor C106 and the resistor R105 in turn.

6. A five-in-one dimmable constant current power supply circuit without frequency flash as claimed in claim 3, characterized in that, The 9-pin of the transformer T100-A is divided into seven ways after the diode D201. The first way is grounded through the capacitor E203, the second way is grounded through the capacitor E204, the third way is grounded through the capacitor E202, the fourth way is grounded through the resistor R204, the fifth way is grounded through the resistor R205, the sixth way is coupled with a 50V power supply, and the seventh way is coupled with one end of the resistor R212. The other end of the resistor R212 is divided into four ways. The first way is coupled with one input end of the optocoupler PC100-A through the capacitor C210. The second way is coupled with one input end of the optocoupler PC100-A through the capacitor C211 and the resistor R217 in sequence. The third way is coupled with the control end of the controllable diode U201. The fourth way is grounded through the resistor R210, and the resistor R211 is connected in parallel with the resistor R210. The anode of the controllable diode U201 is divided into five ways. The first way is coupled with the 21V output end through the resistor R206. The second way is coupled with the 21V output end through the capacitor E205. The third way is coupled with the anode of the diode DZ201. The fourth way is coupled with the collector of the triode Q201 through the capacitor E201. The fifth way is coupled with the 12-pin of T100-A.

7. A five-in-one dimmable flashless constant current power supply circuit as claimed in claim 6, characterized in that, The output end of the 50V power supply is divided into six ways. The first way is coupled with the 4-pin of the switch SW301 through the resistor RI305. The second way is coupled with the 5-pin of the switch SW301 through the resistor RI304. The third way is coupled with the 6-pin of the switch SW301 through the resistor RI303. The fourth way is coupled with one input end of the common-mode inductor LF301 through the resistor RI302. The fifth way is coupled with one input end of the common-mode inductor LF301 through the resistor RI301. The sixth way is coupled with the 1-pin of the chip U301. The 4-pin of the chip U301 is grounded. The 5-pin of the chip U301 is coupled with the gate of the field effect tube Q301 through the resistor R304. The two output ends of the common-mode inductor LF301 are power supply output ends. The 3-pin of the chip U301 is the single-chip microcomputer dimming CCR signal input end.

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