CN107222951B - It is a kind of for improving the RC circuit and method of LED lamp power factor - Google Patents
It is a kind of for improving the RC circuit and method of LED lamp power factor Download PDFInfo
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- CN107222951B CN107222951B CN201710599240.1A CN201710599240A CN107222951B CN 107222951 B CN107222951 B CN 107222951B CN 201710599240 A CN201710599240 A CN 201710599240A CN 107222951 B CN107222951 B CN 107222951B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The invention discloses a kind of for improving the RC circuit of LED lamp power factor, including power supply and zero phase intake circuit (1), it controls signal generating circuit (2), first controlled constant current circuit (3), second controlled constant current circuit (4) and LED lamp (5), wherein power supply and zero phase intake circuit (1) are control signal generating circuit (2), first controlled constant current circuit (3), second controlled constant current circuit (4) voltage different with LED lamp (5) offer and to control signal generating circuit (2) zero phase signal, control signal generating circuit (2) generates the luminance that two groups of different control signals pass through the first controlled constant current circuit (3) and the second controlled constant current circuit (4) control LED lamp (5) respectively.It is provided by the invention a kind of for improving the RC circuit of LED lamp power factor, it can be improved the power factor of LED lamp, improve the service life of LED light and the temperature of LED light can be effectively reduced.
Description
Technical field
The present invention relates to a kind of LED light control circuits, and in particular to a kind of RC electricity for improving LED lamp power factor
Road.
Background technique
In LED lamp, performance, the quality of LED driving are extremely important to pass, the adaptation ability of voltage, especially medium and small
The LED lamp of power had both required low cost, price excellent, and had had also been proposed many technical requirements.LED lamp is by lamp bead (light source), drive
Dynamic and shell three parts composition, wherein determining that quality, the quality of performance of LED lamp depend primarily on LED driving.Outside by lamps and lanterns
The limitation of shell size, it is necessary to using driving small in size, stability is high.The driving of the LED lamp of middle low power has resistance-capacitance depressurization
Formula, isolation constant current mode, non-isolated constant current mode etc..Capacitance-resistance step down type driving structure is simple, the service life is long, inexpensive, power factor is low
In 0.5, power is big with input voltage fluctuation；Isolation constant current mode, the driving of non-isolated constant current mode are currently mainstream, but at high cost,
Performance quality is closely related with circuit structure, and less than 0.7, High Power Factor needs to increase cost power factor.
In recent years, the LED lamp of middle low power has the following problems: a, optical attenuation are serious；B, temperature is too high, filament lamp glass
Glass case temperature is up to 110 DEG C, and the temperature of internal LED filament is more than 130 DEG C, and optical attenuation is big；C, driving is easily damaged.
Summary of the invention
The present invention is that optical attenuation is serious in use, temperature is excessively high and drives for LED lamp in the prior art in order to overcome
The problems such as easy to damage is moved, provides a kind of for improving the RC circuit of LED lamp power factor, can effectively improve LED lamp
Power factor, improve the service life of LED light and the temperature of LED light can be effectively reduced.
The present invention provides a kind of for improving the RC circuit of LED lamp power factor, comprising:
Power supply and zero phase absorb circuit: with LED lamp, the first controlled constant current circuit, control signal generating circuit and the
Two controlled constant current circuits are connected, and there are four voltage output ends for tool；Wherein first voltage output end is used to provide electricity for LED lamp
Pressure, second voltage output end provide voltage with for control signal generating circuit, and tertiary voltage output end is used to be the first controlled perseverance
Current circuit provides voltage, and the 4th voltage output end is used to provide voltage for the second controlled constant current circuit；
Control signal generating circuit: one end absorbs circuit with zero phase with power supply by second voltage output end and is connected,
There are two control signal output, first control signal output end is connected output end tool with the first controlled constant current circuit, the second control
Signal output end processed is connected with the second controlled constant current circuit, for controlling the first controlled constant current circuit and the second controlled constant current circuit
Working condition；
First controlled constant current circuit: first voltage input terminal passes through first voltage output end and power supply and zero phase intake electricity
Road be connected, first control signal input terminal by the first signal control output end with control signal generating circuit be connected, first by
The output end of control constant-current circuit is connected with LED lamp, for controlling the luminance of LED lamp；
Second controlled constant current circuit: second voltage input terminal passes through second voltage output end and power supply and zero phase intake electricity
Road be connected, second control signal input terminal by second signal control output end with control signal generating circuit be connected, second by
The output end of control constant-current circuit is connected with LED lamp, for controlling the luminance of LED lamp；
LED lamp: the LED light being arranged in parallel by two groups forms, and one end is connected with power supply with zero phase intake circuit, wherein
The other end of one group of LED light is connected with the first controlled constant current circuit, the other end and the second controlled constant current circuit of another group of LED light
It is connected.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, power supply and zero
It includes fuse, the first voltage-stablizer, the first rectifier bridge, the second rectifier bridge, first diode, the two or two pole that phase, which absorbs circuit,
Pipe, the first triode, first capacitor, the second capacitor, third capacitor, the 4th capacitor, the 5th capacitor, the 6th capacitor, the 7th capacitor,
8th capacitor, the tenth capacitor, dropping resistor, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th
Resistance, the 7th resistance, the 8th resistance, the 9th resistance, the tenth resistance, eleventh resistor, twelfth resistor, the 27th resistance,
28th resistance；Dropping resistor one end is connected by fuse with firewire, and the other end is connected with the anode of first diode；The
The anode of one diode passes through the first capacitor being arranged in parallel and first resistor is connected with the ac input end of the first rectifier bridge, the
The anode of one diode passes through the second capacitor, second resistance, third capacitor and the 3rd resistor that are arranged in parallel and the second rectifier bridge
Ac input end be connected, the cathode of first diode is connected by the 4th resistance with the base stage of the first triode；One or three pole
The base stage of pipe is grounded by the 5th resistance eutral grounding, the emitter of the first triode, the collector of the first triode and the 6th resistance
It is connected with zero phase output port；The output head anode of second rectifier bridge is connected with LED lamp, and the output of the second rectifier bridge is rectified
Pole passes through the 4th capacity earth, the negative pole of output end ground connection of the first rectifier bridge and the second rectifier bridge, the output end of the first rectifier bridge
Anode is connected with the 27th resistance being arranged in parallel and the 28th resistance；The 27th resistance of parallel resistance and the 28th
The other end of resistance is connected with the power input of the first controlled constant current circuit and the first voltage-stablizer, and the power supply of the first voltage-stablizer is defeated
Enter end to be connected with one end of the cathode of the second diode, the 5th capacitor and the 6th capacitor, the anode of the second diode and the 5th electricity
Appearance is connected with the other end of the 6th capacitor；The power output end of first voltage-stablizer passes through the 7th capacitor being arranged in parallel and the 8th electricity
Hold ground connection, the power output end of the first voltage-stablizer passes through the 7th resistance being arranged in series, the 8th resistance, the 9th resistance, the tenth electricity
Resistance, eleventh resistor and twelfth resistor ground connection；Tenth capacitor, eleventh resistor and twelfth resistor and the second controlled constant current electricity
Road is connected.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, fuse is
Fast melting fuse；Second diode is zener diode；First triode is NPN type；4th capacitor, the 6th capacitor, the 8th electricity
Holding is polarized capacitor.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, control signal
Generation circuit includes the second voltage-stablizer, the 9th capacitor, the 14th capacitor, the 29th resistance, the 30th resistance；Second voltage-stablizer
Equipped with 8 ports, wherein No. 1 port and No. 8 ports and the 9th capacitor are connected, No. 2 ports are connected with zero phase output port,
It is grounded after No. 3 ports and No. 4 ports are in parallel, No. 5 ports are connected with the second controlled constant current circuit, No. 6 ports and the first controlled perseverance
Current circuit is connected, and No. 7 ports are connected with the 14th capacitor, the 29th resistance and the 30th resistance.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, first is controlled
Constant-current circuit includes the first operational amplifier, the second triode, the first field-effect tube, the 11st capacitor, the 12nd capacitor, the tenth
Three resistance, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 19th resistance, third
11 resistance；The non-inverting input terminal of first operational amplifier is connected with tertiary voltage output end, the reverse phase of the first operational amplifier
Input terminal is connected with the 12nd capacitor and the 18th resistance, the output end of the first operational amplifier and the 16th resistance, the 17th
Resistance and the 19th resistance are connected, and the 19th resistance is connected with the 12nd capacitor, the positive supply and negative electricity of the first operational amplifier
Source is connected respectively at the both ends of the 11st capacitor；The pole G of first field-effect tube and the current collection of the 16th resistance and the second triode
Extremely it is connected, the pole S of the first field-effect tube is connected with the 14th resistance, the 15th resistance and the 18th resistance；First control signal
Input terminal is connected with thirteenth resistor and the 31st resistance, the base stage phase of the other end of thirteenth resistor and the second triode
Even.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, second is controlled
Constant-current circuit includes second operational amplifier, third transistor, the second field-effect tube, the 13rd capacitor, the 20th resistance, second
11 resistance, the 22nd resistance, the 23rd resistance, the 24th resistance, the 25th resistance, the 26th resistance,
32 resistance；The non-inverting input terminal of second operational amplifier is connected with the 4th voltage output end, second operational amplifier it is anti-
Phase input terminal is connected with the 13rd capacitor and the 25th resistance, the output end of second operational amplifier and the 23rd resistance,
24th resistance and the 26th resistance are connected, and the 26th resistance is connected with the 13rd capacitor；The pole G of second field-effect tube
It is connected with the collector of the 23rd resistance and third transistor, the pole S of the second field-effect tube and the 21st resistance, the 20th
Two resistance and the 25th resistance are connected；Second control signal input terminal is connected with the 20th resistance and the 32nd resistance, the
The other end of 20 resistance is connected with the base stage of third transistor.
It is of the present invention a kind of for improving the RC circuit of LED lamp power factor, it is preferred that, the two or three pole
Pipe and third transistor are NPN type；It is enhanced for the first field-effect tube and the second field-effect tube N ditch.
The present invention is in use, comprising the following steps:
The formation of S1, power supply and zero phase intake circuit zero phase: power on rear power supply and pass through F1, R0, D3, R4, R5
The positive half cycle of the alternating current of 50Hz is added between the base stage and emitter of triode Q5, as the amplitude of alternating current changes,
Transistor collector produces the zero phase pulse with the alternating current same-phase of input, as shown in Figure 4；
The first via RC step-down rectifying circuit that S2, power supply are formed via F1, R0, C1, R1, D1 forms first via direct current,
It is depressured current limliting through R27, R28, by D4 pressure stabilizing, is filtered through C5, C6, obtains VCC burning voltage, provided for the first controlled constant current circuit
Voltage；VCC burning voltage obtains stable vdd voltage through U1 pressure stabilizing, C7, C8 filtering, provides electricity for control signal generating circuit
Pressure；Vdd voltage is divided by R7,8R, 9R, R10, R11, R12, obtains constant current reference voltage, is mentioned for the second controlled constant current circuit
Voltage supplied；
S3, the another way power supply through F1, R0 are rectified by C2, C3, R2, R3 resistance-capacitance depressurization, D2, are generated VOUT voltage, are
LED light provides voltage；
S4, control signal generating circuit: job initiation state of the zero phase signal ZC by P02 input control U2, output end
The control signal of M1_CTRL and M2_CTRL can effectively be changed LED in pulse under the control of ZC signal by the control of ZC signal
Inverse peak voltage and negative peak electric current when work, protect LED not breakdown；AN0, AN1 export M1_CTRL and M2_CTRL signal, such as
Shown in Fig. 5；
S5, C14, R29, R30 constitute dimming input circuit, and the 0~10V analog voltage or pwm signal of light modulation are by the end AN4
Input controls the output amplitude of M1_CTRL and M2_CTRL, achievees the purpose that light modulation；
S6, the first controlled constant current circuit receive M1_CTRL signal, control the luminance of first group of LED；Second control constant current
Circuit receives M2_CTRL signal, controls the luminance of second group of LED.
The present invention can reach following technical effect:
1) signal of circuit is formed by zero phase, LED operation current phase is controlled, so that the phase of LED operation electric current connects
It is bordering on input voltage phase, ensure that power factor (PF value) is greater than 0.9.
2) using subitem control mode, it ensure that not will increase for LED junction temperature, thus it is possible to reduce by 30% or so LED
Junction temperature temperature.
3) multichannel light phase superimposing technique is used, LED light flux and light efficiency are improved.
Detailed description of the invention
Fig. 1 is a kind of for improving the RC circuit diagram of LED lamp power factor；
Fig. 2 is a kind of for improving the RC circuit composition figure of LED lamp power factor；
Fig. 3 is that a kind of RC circuit power for improving LED lamp power factor and zero phase absorb circuit composition figure；
Fig. 4 is a kind of for improving the RC circuit control signal generation circuit composition figure of LED lamp power factor；
Fig. 5 is a kind of for improving RC circuit the first controlled constant current circuit composition figure of LED lamp power factor；
Fig. 6 is a kind of for improving RC circuit the second controlled constant current circuit composition figure of LED lamp power factor；
Fig. 7 is that a kind of RC circuit power for improving LED lamp power factor and zero phase absorb circuit output waveform
With zero phase relational graph；
Fig. 8 is a kind of RC circuit control signal generation circuit work wave extension for improving LED lamp power factor
Figure.
Appended drawing reference:
1, power supply and zero phase absorb circuit；11, first voltage output end；12, second voltage output end；13, third electricity
Press output end；14, the 4th voltage output end；2, signal generating circuit is controlled；21, first control signal output end；22, the second control
Signal output end processed；3, the first controlled constant current circuit；31, first voltage output end；32, first control signal input terminal；4,
Two controlled constant current circuits composition figure；41, second voltage output end；42, second control signal input terminal；5, LED lamp.
Specific embodiment
Embodiment 1
As shown in Fig. 1~2, the present invention provides a kind of for improving the RC circuit of LED lamp power factor, and feature exists
In: include:
Power supply and zero phase absorb circuit 1: with LED lamp 5, the first controlled constant current circuit 3, control signal generating circuit 2
It is connected with the second controlled constant current circuit 4, there are four voltage output ends for tool；Wherein first voltage output end 11 is used to be LED lamp 5
Voltage is provided, second voltage output end 12 provides voltage with for control signal generating circuit 2, and tertiary voltage output end 13 is for being
First controlled constant current circuit 3 provides voltage, and the 4th voltage output end 14 is used to provide voltage for the second controlled constant current circuit 4.
The circuit diagram of power supply and zero phase intake circuit 1 is as shown in figure 3, the one end R0 is connected by F1 with firewire, the other end
It is connected with the anode of D3；The anode of D3 passes through the C1 being arranged in parallel and R1 is connected with the ac input end of D1, and the anode of D3 passes through
C1, R1, C3 and the R3 being arranged in parallel are connected with the ac input end of D2, and the cathode of D3 is connected by R4 with the base stage of Q5；Q5's
Base stage is grounded by R5, and the emitter ground connection of Q5, the collector of Q5 is connected with R6 and zero phase output port；The output of D2 is rectified
Pole is connected with LED lamp 5, and the output head anode of D2 is grounded by C4, and the negative pole of output end ground connection of D1 and D2, the output of D1 are rectified
Pole is connected with the R27 and R28 being arranged in parallel；The other end of parallel resistance R27 and R28 and the first controlled constant current circuit 3 and U1
Power input is connected, and the power input of U1 is connected with one end of the cathode of D4, C5 and C6, and D4's is positive another with C5 and C6
One end is connected；The power output end of U1 passes through the C7 that is arranged in parallel and C8 ground connection, and the power output end of U1, which passes through, to be arranged in series
R7~R12 ground connection；C 10, R11 and R12 are connected with the second controlled constant current circuit 4.
It controls signal generating circuit 2: one end 1 phase of circuit being absorbed by second voltage output end 12 and power supply and zero phase
Even, there are two control signal output, first control signal output end 21 and 3 phases of the first controlled constant current circuit for output end tool
Even, second control signal output end 22 is connected with the second controlled constant current circuit 4, is used for the first controlled constant current circuit 3 of control and the
The working condition of two controlled constant current circuits 4.
The circuit diagram of signal generating circuit 2 is controlled as shown in figure 4, U2 is equipped with 8 ports, wherein No. 1 port and No. 8 ports
With being connected for C9, No. 2 ports are connected with zero phase output port, No. 3 ports and No. 4 ports it is in parallel after be grounded, No. 5 ports and the
Two controlled constant current circuits 4 are connected, and No. 6 ports are connected with the first controlled constant current circuit 3, and No. 7 ports are connected with C14, R29 and R30.
First controlled constant current circuit 3: first voltage input terminal 31 passes through the first voltage output end 11 and power supply and zero
Phase absorbs circuit 1 and is connected, and first control signal input terminal 32 is generated by the first signal control output end 21 and control signal
Circuit 2 is connected, and the output end of the first controlled constant current circuit 3 is connected with LED lamp 5, for controlling the luminance of LED lamp 5.
The circuit diagram of first controlled constant current circuit 3 as shown in figure 5, U3A non-inverting input terminal and tertiary voltage output end 13
It is connected, the inverting input terminal of U3A is connected with C12 and R18, and the output end of U3A is connected with R16, R17 and R19, R19 and C12 phase
Even, the positive supply of U3A is connected with negative supply respectively at the both ends of C11；The pole G of Q1 is connected with the collector of R16 and Q3, the S of Q1
Pole is connected with R14, R15 and R18；First control signal input terminal 21 is connected with R13 and R31, R13) the other end and Q3 base
Extremely it is connected.
Second controlled constant current circuit 4: second voltage input terminal 41 passes through second voltage output end 12 and power supply and zero phase
It absorbs circuit 1 to be connected, second control signal input terminal 42 passes through second signal control output end 22 and control signal generating circuit 2
It is connected, the output end of the second controlled constant current circuit 4 is connected with LED lamp 5, for controlling the luminance of LED lamp 5；
The circuit diagram of second controlled constant current circuit 4 is as shown in fig. 6, the non-inverting input terminal of U3B and the 4th voltage output end 14
It is connected, the inverting input terminal of U3B is connected with C12 and R25, and the output end of U3B is connected with R23, R24 and R26, R26 and C13 phase
Even；The pole G of Q2 is connected with the collector of R23 and Q4, and the pole S of Q2 is connected with R21, R22 and R25；Second control signal input terminal
22 are connected with R20 and R32, and the other end of R20 is connected with the base stage of Q4.
LED lamp (5): the LED light being arranged in parallel by two groups forms, and circuit is absorbed in one end and the power supply and zero phase
(1) be connected, wherein the other end of one group of LED light is connected with the first controlled constant current circuit (3), another group of LED light it is another
End is connected with the second controlled constant current circuit (4).
The present embodiment is in use, comprising the following steps:
The formation of S1, power supply and zero phase intake circuit zero phase: power on rear power supply and pass through F1, R0, D3, R4, R5
The positive half cycle of the alternating current of 50Hz is added between the base stage and emitter of triode Q5, as the amplitude of alternating current changes,
Transistor collector produces the zero phase pulse with the alternating current same-phase of input, as shown in Figure 4；
The first via RC step-down rectifying circuit that S2, power supply are formed via F1, R0, C1, R1, D1 forms first via direct current,
It is depressured current limliting through R27, R28, by D4 pressure stabilizing, is filtered through C5, C6, obtains the VCC burning voltage of 12V, is the first controlled constant current electricity
Road provides voltage；12V voltage obtains the vdd voltage of stable 5V through U1 pressure stabilizing, C7, C8 filtering, to control signal generating circuit
Voltage is provided；5V voltage R7,8R, 9R, R10, R11, R12 partial pressure, obtain the constant current reference voltage of 500mV, are the second controlled perseverance
Current circuit provides voltage；
S3, the another way power supply through F1, R0 are rectified by C2, C3, R2, R3 resistance-capacitance depressurization, D2, are generated VOUT voltage, are
LED light provides voltage；Wherein C2, C3 can be adjusted according to the requirement of LED light source power and electric current；C2, C3 are using electrodeless
Property capacitor, do not have to high-voltage electrolytic capacitor, can be used safety patch capacitor yet, thus it is small in size, the service life is long, reliability increases；
S4, control signal generating circuit: job initiation state of the zero phase signal ZC by P02 input control U2, output end
The control signal of M1_CTRL and M2_CTRL can effectively be changed LED in pulse under the control of ZC signal by the control of ZC signal
Inverse peak voltage and negative peak electric current when work, protect LED not breakdown；AN0, AN1 export M1_CTRL and M2_CTRL signal, such as
Shown in Fig. 5, working frequency when LED is lighted is that 1000Hz is divided into it three groups of work in the time of every 1ms, and phase is
120 °, the first via and second group of working time are 600us, and third group is not involved in work, and then the first via and the second road are equal
Work and pulse condition, duty ratio very little, third road are not added artificial work, ensure that the gap of the first via and the second paths of LEDs
Time, so ensure that not will increase for LED junction temperature, thus it is possible to reduce by 30% or so LED junction temperature temperature；
S5, C14, R29, R30 constitute dimming input circuit, and the 0~10V analog voltage or pwm signal of light modulation are by the end AN4
Input controls the output amplitude of M1_CTRL and M2_CTRL, achievees the purpose that light modulation；
S6, the first controlled constant current circuit receive M1_CTRL signal, control the luminance of first group of LED；Second control constant current
Circuit receives M2_CTRL signal, controls the luminance of second group of LED.
Illustrate to be merely exemplary for the purpose of the present invention, and not restrictive, those of ordinary skill in the art understand, not
In the case where being detached from spirit and scope defined by claim, any modification, variation or the equivalents that can be made will all be fallen
Enter within the protection scope of invention.
Claims (9)
1. a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: include:
Power supply and zero phase intake circuit (1): it uses subitem control mode, with LED lamp (5), the first controlled constant current circuit
(3), control signal generating circuit (2) is connected with the second controlled constant current circuit (4), and there are four voltage output end, power factors for tool
Greater than 0.9；Wherein first voltage output end (11) is used to provide voltage, second voltage output end (12) for the LED lamp (5)
Voltage is provided with for the control signal generating circuit (2), tertiary voltage output end (13) is used to be first controlled constant current
Circuit (3) provides voltage, and the 4th voltage output end (14) is used to provide voltage for the second controlled constant current circuit (4)；
It controls signal generating circuit (2): being absorbed by the second voltage output end (12) and the power supply and zero phase one end
Circuit (1) is connected, output end tool there are two control signal output, first control signal output end (21) with described first by
It controls constant-current circuit (3) to be connected, second control signal output end (22) is connected with the second controlled constant current circuit (4), for controlling
Make the working condition of the first controlled constant current circuit (3) and the second controlled constant current circuit (4)；
First controlled constant current circuit (3): first voltage input terminal (31) passes through the tertiary voltage output end (13) and the electricity
Source is connected with zero phase intake circuit (1), and first control signal input terminal (32) passes through the first control signal output end
(21) it is connected with the control signal generating circuit (2), the output end of the first controlled constant current circuit (3) and LED lamp (5)
It is connected, for controlling the luminance of LED lamp (5)；
Second controlled constant current circuit (4): second voltage input terminal (41) passes through the 4th voltage output end (14) and the electricity
Source is connected with zero phase intake circuit (1), and second control signal input terminal (42) passes through the second control signal output end
(22) it is connected with the control signal generating circuit (2), the output end of the second controlled constant current circuit (4) and LED lamp (5)
It is connected, for controlling the luminance of LED lamp (5)；
LED lamp (5): the LED light being arranged in parallel by two groups forms, and circuit (1) phase is absorbed with the power supply and zero phase in one end
Even, wherein the other end of one group of LED light is connected with the first controlled constant current circuit (3), the other end of another group of LED light and institute
The second controlled constant current circuit (4) is stated to be connected.
2. according to claim 1 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
Power supply and zero phase intake circuit (1) include fuse (F1), the first voltage-stablizer (U1), the first rectifier bridge (D1), the second rectification
Bridge (D2), first diode (D3), the second diode (D4), the first triode (Q5), first capacitor (C1), the second capacitor
(C2), third capacitor (C3), the 4th capacitor (C4), the 5th capacitor (C5), the 6th capacitor (C6), the 7th capacitor (C7), the 8th electricity
Hold (C8), the tenth capacitor (C10), dropping resistor (R0), first resistor (R1), second resistance (R2), 3rd resistor (R3), the 4th
Resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9),
Ten resistance (R10), eleventh resistor (R11), twelfth resistor (R12), the 27th resistance (R27), the 28th resistance
(R28)；Described dropping resistor one end (R0) is connected by the fuse (F1) with firewire, the other end and the first diode
(D3) anode is connected；The anode of the first diode (D3) passes through the first capacitor (C1) that is arranged in parallel and described the
One resistance (R1) is connected with the ac input end of first rectifier bridge (D1), and the anode of the first diode (D3) is by simultaneously
Join second capacitor (C2), the second resistance (R1), the third capacitor (C3) and the 3rd resistor (R3) of setting
It is connected with the ac input end of second rectifier bridge (D2), the cathode of the first diode (D3) passes through the 4th resistance
(R4) it is connected with the base stage of first triode (Q5)；The base stage of first triode (Q5) passes through the 5th resistance
(R5) it is grounded, the emitter ground connection of first triode (Q5), the collector and the described 6th of first triode (Q5)
Resistance (R6) is connected with zero phase output port；The output head anode of second rectifier bridge (D2) is connected with LED lamp (5),
The output head anode of second rectifier bridge (D2) is grounded by the 4th capacitor (C4), first rectifier bridge (D1) and institute
State the negative pole of output end ground connection of the second rectifier bridge (D2), the output head anode of first rectifier bridge (D1) and the institute being arranged in parallel
The 27th resistance (R27) is stated to be connected with the 28th resistance (R28)；The 27th resistance being arranged in parallel
(R27) and the other end of the 28th resistance (R28) and the first controlled constant current circuit (3) and first voltage-stablizer
(U1) power input is connected, and the power input of first voltage-stablizer (U1) is negative with second diode (D4)
Pole, the 5th capacitor (C5) are connected with one end of the 6th capacitor (C6), the anode of second diode (D4) and institute
The 5th capacitor (C5) is stated to be connected with the other end of the 6th capacitor (C6)；The power output end of first voltage-stablizer (U1) is logical
The 7th capacitor (C7) being arranged in parallel and the 8th capacitor (C8) ground connection are crossed, the power supply of first voltage-stablizer (U1) is defeated
Outlet passes through the 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9), the described tenth being arranged in series
Resistance (R10), the eleventh resistor (R11) and the twelfth resistor (R12) ground connection；It is tenth capacitor (C10), described
Eleventh resistor (R11) and the twelfth resistor (R12) are connected with the second controlled constant current circuit (4).
3. according to claim 2 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
Fuse (F1) is fast melting fuse；Second diode (D4) is zener diode；First triode (Q5) is NPN
Type；4th capacitor (C4), the 6th capacitor (C6), the 8th capacitor (C8) are polarized capacitor.
4. according to claim 1 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
Controlling signal generating circuit (2) includes the second voltage-stablizer (U2), the 9th capacitor (C9), the 14th capacitor (C14), the 29th electricity
Hinder (R29), the 30th resistance (R30)；Second voltage-stablizer (U2) is equipped with 8 ports, wherein No. 1 port and No. 8 ports with
9th capacitor (C9) is connected, and No. 2 ports are connected with the zero phase output port, behind No. 3 ports and No. 4 ports parallel connections
Ground connection, No. 5 ports are connected with the second controlled constant current circuit (4), No. 6 ports and the first controlled constant current circuit (3) phase
Even, No. 7 ports and the 14th capacitor (C14), the 29th resistance (R29) and the 30th resistance (R30) phase
Even.
5. according to claim 1 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
First controlled constant current circuit (3) includes the first operational amplifier (U3A), the second triode (Q3), the first field-effect tube (Q1), the
11 capacitors (C11), the 12nd capacitor (C12), thirteenth resistor (R13), the 14th resistance (R14), the 15th resistance
(R15), the 16th resistance (R16), the 17th resistance (R17), the 18th resistance (R18), the 19th resistance (R19), the 30th
One resistance (R31)；The non-inverting input terminal of first operational amplifier (U3A) is connected with the tertiary voltage output end (13),
The inverting input terminal of first operational amplifier (U3A) and the 12nd capacitor (C12) and the 18th resistance (R18)
It is connected, the output end of first operational amplifier (U3A) and the 16th resistance (R16), the 17th resistance (R17)
It is connected with the 19th resistance (R19), the 19th resistance (R19) is connected with the 12nd capacitor (C12), and described
The positive supply of one operational amplifier (U3A) is connected with negative supply respectively at the both ends of the 11st capacitor (C11)；Described first
The pole G of field-effect tube (Q1) is connected with the collector of the 16th resistance (R16) and second triode (Q3), and described
The pole S of one field-effect tube (Q1) and the 14th resistance (R14), the 15th resistance (R15) and the 18th resistance
(R18) it is connected；The first control signal input terminal (32) and the thirteenth resistor (R13) and the 31st resistance
(R31) it is connected, the other end of the thirteenth resistor (R13) is connected with the base stage of second triode (Q3).
6. according to claim 1 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
Second controlled constant current circuit (4) includes second operational amplifier (U3B), third transistor (Q4), the second field-effect tube (Q2),
13 capacitors (C13), the 20th resistance (R20), the 21st resistance (R21), the 22nd resistance (R22), the 23rd electricity
Hinder (R23), the 24th resistance (R24), the 25th resistance (R25), the 26th resistance (R26), the 32nd resistance
(R32)；The non-inverting input terminal of the second operational amplifier (U3B) is connected with the 4th voltage output end (14), and described
The inverting input terminal of two operational amplifiers (U3B) and the 13rd capacitor (C12) and the 25th resistance (R25) phase
Even, the output end of the second operational amplifier (U3B) and the 23rd resistance (R23), the 24th resistance
(R24) it is connected with the 26th resistance (R26), the 26th resistance (R26) and the 13rd capacitor (C13) phase
Even；The pole G of second field-effect tube (Q2) and the current collection of the 23rd resistance (R23) and the third transistor (Q4)
Extremely it is connected, the pole S of second field-effect tube (Q2) and the 21st resistance (R21), the 22nd resistance (R22)
It is connected with the 25th resistance (R25)；The second control signal input terminal (42) and the 20th resistance (R20) and
32nd resistance (R32) is connected, the other end of the 20th resistance (R20) and the base of the third transistor (Q4)
Extremely it is connected.
7. it is a kind of for improving the RC circuit of LED lamp power factor according to claim 5 or 6 any one, it is special
Sign is: second triode (Q3) is NPN type；First field-effect tube (Q1) is N-channel enhancement mode FET.
8. according to claim 6 a kind of for improving the RC circuit of LED lamp power factor, it is characterised in that: described
Third transistor (Q4) is NPN type；Second field-effect tube (Q2) is N-channel enhancement mode FET.
9. a kind of method for improving the RC circuit of LED lamp power factor, it is characterised in that: include the following steps,
The formation of S1, power supply and zero phase intake circuit (1) zero phase: power on rear power supply and pass through fuse (F1), decompression
The positive half cycle of alternating current is added to the one or three pole by resistance (R0), first diode (D3), the 4th resistance (R4), the 5th resistance (R5)
Manage (Q5) base stage and emitter between, with alternating current amplitude change, the first triode (Q5) collector produce with
The zero phase pulse of the alternating current same-phase of input；
S2, power supply are via fuse (F1), dropping resistor (R0), first capacitor (C1), first resistor (R1), the first rectifier bridge
(D1) first via RC step-down rectifying circuit formed forms first via direct current, through the 27th resistance (R27), the 28th
Resistance (R28) is depressured current limliting, by the second triode (D4) pressure stabilizing, filters, obtains through the 5th capacitor (C5), the 6th capacitor (C6)
VCC burning voltage provides voltage for the first controlled constant current circuit (3)；VCC burning voltage is through U1 pressure stabilizing, the 7th capacitor (C7),
Eight capacitors (C8) filtering, obtains stable vdd voltage, provides voltage for control signal generating circuit (2)；Vdd voltage is by the
Seven resistance (R7), the 8th resistance (R8), the 9th resistance (R9), the tenth resistance (R10), eleventh resistor (R11), twelfth resistor
(R12) it divides, obtains constant current reference voltage, provide voltage for the second controlled constant current circuit (4)；
S3, another way power supply through F1 fuse (F1), dropping resistor (R0) by the second capacitor (C2), third capacitor (C3),
Second resistance (R2), 3rd resistor (R3) resistance-capacitance depressurization, the second rectifier bridge (D2) rectification, generate VOUT voltage, are LED lamp
(5) voltage is provided；
S4, control signal generating circuit (2): zero phase signal ZC by the second voltage-stablizer of P02 input control (U2) job initiation
State, the signal M1_CTRL of first control signal output end (21) output and the letter of second control signal output end (22) output
Number M2_CTRL can effectively be changed inverse peak voltage and negative peak electric current of the LED in pulsed operation by the control of ZC signal, be protected
LED is not breakdown；
S5, the 14th capacitor (C14), the 29th resistance (R29), the 30th resistance (R30) constitute dimming input circuit, adjust
0~10V the analog voltage or pwm signal of light are inputted by the end AN4, are controlled the output amplitude of signal M1_CTRL and M2_CTRL, are reached
To the purpose of light modulation；
S6, the first controlled constant current circuit (3) receive M1_CTRL signal, control the luminance of first group of LED；Second control constant current
Circuit (4) receives M2_CTRL signal, controls the luminance of second group of LED.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710599240.1A CN107222951B (en) | 2017-07-21 | 2017-07-21 | It is a kind of for improving the RC circuit and method of LED lamp power factor |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202696969U (en) * | 2012-06-27 | 2013-01-23 | 上舜照明（中国）有限公司 | Light-emitting diode (LED) constant-current drive power supply capable of resisting alternating current (AC) voltage shocks |
| CN103155708A (en) * | 2010-07-15 | 2013-06-12 | 绿色照明概念公司 | Power integrated circuit for LED lighting |
| WO2015064775A1 (en) * | 2013-10-28 | 2015-05-07 | 정연문 | Power integrated circuit for led lighting |
| CN207219092U (en) * | 2017-07-21 | 2018-04-10 | 江苏丰特光电科技有限公司 | A kind of RC circuits for being used to improve LED lamp power factor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9655174B2 (en) * | 2015-07-14 | 2017-05-16 | The Hong Kong Polytechnic University | Multi-string LED driver with current balancing |
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2017
- 2017-07-21 CN CN201710599240.1A patent/CN107222951B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103155708A (en) * | 2010-07-15 | 2013-06-12 | 绿色照明概念公司 | Power integrated circuit for LED lighting |
| CN202696969U (en) * | 2012-06-27 | 2013-01-23 | 上舜照明（中国）有限公司 | Light-emitting diode (LED) constant-current drive power supply capable of resisting alternating current (AC) voltage shocks |
| WO2015064775A1 (en) * | 2013-10-28 | 2015-05-07 | 정연문 | Power integrated circuit for led lighting |
| CN207219092U (en) * | 2017-07-21 | 2018-04-10 | 江苏丰特光电科技有限公司 | A kind of RC circuits for being used to improve LED lamp power factor |
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| CN107222951A (en) | 2017-09-29 |
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