CN207070405U

CN207070405U - A kind of LED lamp zero phase absorbs circuit

Info

Publication number: CN207070405U
Application number: CN201720889289.6U
Authority: CN
Inventors: 王森; 潘辰
Original assignee: Jiangsu Rich Photoelectric Technology Co Ltd
Current assignee: Jiangsu Rich Photoelectric Technology Co Ltd
Priority date: 2017-07-21
Filing date: 2017-07-21
Publication date: 2018-03-02
Anticipated expiration: 2027-07-21

Abstract

The utility model discloses a kind of LED lamp zero phase to absorb circuit, power supply and zero phase intake circuit (1)：It is connected with LED lamp (5), the first controlled constant current circuit (3), control signal generation circuit (2) and the second controlled constant current circuit (4), there are four voltage output ends；Wherein first voltage output end (11) is used to provide voltage for the LED lamp (5), second voltage output end (12) provides voltage with for the control signal generation circuit (2), tertiary voltage output end (13) is used to provide voltage for the first controlled constant current circuit (3), and the 4th voltage output end (14) is used to provide voltage for the second controlled constant current circuit (4).A kind of LED lamp zero phase intake circuit provided by the utility model, it is possible to increase the power factor of LED lamp, improve the life-span of LED and the temperature of LED can be effectively reduced.

Description

A kind of LED lamp zero phase absorbs circuit

Technical field

It the utility model is related to a kind of LED control circuit, and in particular to a kind of LED lamp zero phase absorbs circuit.

Background technology

In LED lamp, performance, the quality of LED drivings are extremely important to pass, the adaptation ability of voltage, particularly medium and small The LED lamp of power, both required that low cost, price were excellent, and 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 drivings.Outside by light fixture The limitation of shell size, it is necessary to using the high driving of small volume, stability.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, long lifespan, low cost, power factor are 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 main flow, but cost is high, Performance quality is closely related with circuit structure, and power factor is less than 0.7, and High Power Factor needs increase cost.

In recent years, there is problems with the LED lamp of middle low power：A, optical attenuation is serious；B, temperature is too high, filament lamp glass Glass case temperature is up to 110 DEG C, and for the temperature of internal LED filament more than 130 DEG C, optical attenuation is big；C, driving is easily damaged.

Utility model content

The utility model is that optical attenuation is serious in use, temperature is too high for LED lamp in the prior art in order to overcome With drive the problems such as fragile, there is provided a kind of LED lamp zero phase absorbs circuit, can effectively improve the power of LED lamp Factor, improve the life-span of LED and the temperature of LED can be effectively reduced.

The utility model provides a kind of LED lamp zero phase intake circuit, including：

Power supply and zero phase intake circuit：With LED lamp, the first controlled constant current circuit, control signal generation circuit and Two controlled constant current circuits are connected, and have four voltage output ends；Wherein first voltage output end is used to provide electricity for LED lamp Pressure, second voltage output end provide voltage with for control signal generation circuit, and it is the first controlled perseverance that tertiary voltage output end, which is used for, Current circuit provides voltage, and the 4th voltage output end is used to provide voltage for the second controlled constant current circuit.

A kind of LED lamp controlled constant current circuit described in the utility model, it is preferred that, power supply absorbs with zero phase Circuit includes fuse, the first voltage-stablizer, the first rectifier bridge, the second rectifier bridge, the first diode, the second diode, the one or three Pole pipe, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, the 7th electric capacity, the 8th electric capacity, Tenth electric capacity, 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, the 11st resistance, the 12nd resistance, the 27th resistance, the 28th electricity Resistance；Dropping resistor one end is connected by fuse with live wire, and the other end is connected with the positive pole of the first diode；First diode Positive pole is connected by the first electric capacity and first resistor being arranged in parallel with the ac input end of the first rectifier bridge, the first diode Positive pole exchanges input by the second electric capacity, second resistance, the 3rd electric capacity and the 3rd resistor that are arranged in parallel and the second rectifier bridge End is connected, and the negative pole of the first diode is connected by the 4th resistance with the base stage of the first triode；The base stage of first triode is led to The 5th resistance eutral grounding is crossed, the grounded emitter of the first triode, the colelctor electrode of the first triode and the 6th resistance and zero phase are defeated Exit port is connected；The output head anode of second rectifier bridge is connected with LED lamp, and the output head anode of the second rectifier bridge passes through the 4th Capacity earth, the first rectifier bridge and the second rectifier bridge negative pole of output end ground connection, the output head anode of the first rectifier bridge with it is in parallel The 27th resistance and the 28th resistance set is connected；The resistance of parallel resistance the 27th and the 28th resistance it is another End is connected with the power input of the first controlled constant current circuit and the first voltage-stablizer, the power input of the first voltage-stablizer and second One end of the negative pole of diode, the 5th electric capacity and the 6th electric capacity is connected, the positive pole of the second diode and the 5th electric capacity and the 6th electricity The other end of appearance is connected；The power output end of first voltage-stablizer is by the 7th electric capacity being arranged in parallel and the 8th capacity earth, and The power output end of one voltage-stablizer passes through the 7th resistance that is arranged in series, the 8th resistance, the 9th resistance, the tenth resistance, the 11st Resistance and the 12nd resistance eutral grounding；Tenth electric capacity, the 11st resistance and the 12nd resistance are connected with the second controlled constant current circuit.

A kind of LED lamp controlled constant current circuit described in the utility model, it is preferred that, fuse is fast molten insurance Silk；Second diode is voltage-regulator diode；First triode is NPN type；4th electric capacity, the 6th electric capacity, the 8th electric capacity are to have pole Property electric capacity.

A kind of LED lamp controlled constant current circuit described in the utility model, it is preferred that, the second triode and the 3rd Triode is NPN type；It is enhanced for the first FET and the second FET N ditches.

The utility model in use, comprises the following steps：

S1, power supply and zero phase intake circuit zero phase formation：Power supply passes through F1, R0, D3, R4, R5 after switching on power The positive half cycle of 50Hz alternating current is added between triode Q5 base stage and emitter stage, with the changes in amplitude of alternating current, Transistor collector generates the zero phase pulse with the alternating current same-phase of input, as shown in Figure 4；

The first via RC step-down rectifying circuits that S2, power supply form via F1, R0, C1, R1, D1, first via direct current is formed, Current limliting is depressured through R27, R28, by D4 voltage stabilizings, is filtered through C5, C6, obtains VCC burning voltages, provided for the first controlled constant current circuit Voltage；VCC burning voltages C7, C8 filtering, the vdd voltage stablized, electricity are provided for control signal generation circuit through U1 voltage stabilizings Pressure；Vdd voltage passes through R7,8R, 9R, R10, R11, R12 partial pressure, obtains constant current reference voltage, is carried for the second controlled constant current circuit Voltage supplied；

S3, the another way power supply through F1, R0 produce VOUT voltages, are by C2, C3, R2, R3 resistance-capacitance depressurization, D2 rectifications LED provides voltage；

S4, control signal generation circuit：Zero phase signal ZC is inputted control U2 job initiation state, output end by P02 M1_CTRL and M2_CTRL control signal is controlled by ZC signals, under the control of ZC signals, can effectively change LED in pulse Inverse peak voltage and negative peak electric current during work, protect LED not breakdown；AN0, AN1 export M1_CTRL and M2_CTRL signals, such as Shown in Fig. 5；

S5, C14, R29, R30 constitute dimming input circuit, and the 0~10V analog voltages or pwm signal of light modulation are by AN4 ends Input, M1_CTRL and M2_CTRL output amplitude is controlled, reach the purpose of light modulation；

S6, the first controlled constant current circuit receive M1_CTRL signals, control first group of LED luminance；Second control constant current Circuit receives M2_CTRL signals, controls second group of LED luminance.

The utility model can reach following technique effect：

1) signal of circuit is formed by zero phase, controls LED operation current phase so that the phase of LED operation electric current connects Input voltage phase is bordering on, ensure that power factor (PF values) is more than 0.9.

2) using subitem control mode, will not increasing for LED junction temperature is ensure that, thus it is possible to reduce by 30% or so LED Junction temperature temperature.

3) multichannel light phase superimposing technique is used, improves LED light flux and light efficiency.

Brief description of the drawings

Fig. 1 is a kind of RC circuit diagrams for being used to improve LED lamp power factor；

Fig. 2 is a kind of RC circuit composition figures for being used to improve LED lamp power factor；

Fig. 3 is that a kind of RC circuit powers for being used to improve LED lamp power factor absorb circuit composition figure with zero phase；

Fig. 4 is a kind of RC circuit control signal generation circuit composition figures for being used to improve LED lamp power factor；

Fig. 5 is a kind of RC circuits the first controlled constant current circuit composition figure for being used to improve LED lamp power factor；

Fig. 6 is a kind of RC circuits the second controlled constant current circuit composition figure for being used to improve LED lamp power factor；

Fig. 7 is that a kind of RC circuit powers for being used to improve LED lamp power factor absorb circuit output waveform with zero phase With zero phase graph of a relation；

Fig. 8 is a kind of RC circuit control signal generation circuits work wave extension for being used to improve LED lamp power factor Figure.

Reference：

1st, power supply and zero phase intake circuit；11st, first voltage output end；12nd, second voltage output end；13rd, the 3rd electricity Press output end；14th, the 4th voltage output end；2nd, control signal generation circuit；21st, the first control signal output；22nd, the second control Signal output part processed；3rd, the first controlled constant current circuit；31st, first voltage output end；32nd, the first control signal input；4th, Two controlled constant current circuits composition figure；41st, second voltage output end；42nd, the second control signal input；5th, LED lamp.

Embodiment

Embodiment 1

As shown in Fig. 1~2, the utility model provides a kind of LED lamp zero phase intake circuit, it is characterised in that：Including：

Power supply and zero phase intake circuit 1：With LED lamp 5, the first controlled constant current circuit 3, control signal generation circuit 2 It is connected with the second controlled constant current circuit 4, there are four voltage output ends；It is LED lamp 5 that wherein first voltage output end 11, which is used for, Voltage is provided, second voltage output end 12 provides voltage with for control signal generation 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, R0 one end is connected by F1 with live wire, the other end It is connected with D3 positive pole；D3 positive pole is connected by the C1 and R1 being arranged in parallel with D1 ac input end, and D3 positive pole passes through C1, R1, C3 and the R3 being arranged in parallel are connected with D2 ac input end, and D3 negative pole is connected by R4 with Q5 base stage；Q5's Base stage is grounded by R5, Q5 grounded emitter, and Q5 colelctor electrode is connected with R6 and zero phase output port；D2 output is rectified Pole is connected with LED lamp 5, and D2 output head anode is grounded by C4, and D1 and D2 negative pole of output end ground connection, D1 output are rectified Pole is connected with the R27 and R28 being arranged in parallel；Parallel resistance R27 and the R28 other end and the first controlled constant current circuit 3 and U1 Power input is connected, and U1 power input is connected with D4 negative pole, C5 and C6 one end, and D4 positive pole is another with C5's and C6 One end is connected；U1 power output end is grounded by the C7 and C8 that are arranged in parallel, and U1 power output end is by being arranged in series R7~R12 is grounded；C 10, R11 and R12 are connected with the second controlled constant current circuit 4.

Control signal generation circuit 2：One end the phase of circuit 1 is absorbed by second voltage output end 12 and power supply and zero phase Even, its output end has two control signal outputs, the first control signal output 21 and the phase of the first controlled constant current circuit 3 Even, the second control signal output 22 is connected with the second controlled constant current circuit 4, 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 control signal generation circuit 2 is as shown in figure 4, U2 is provided 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, are grounded after No. 3 ports and No. 4 port parallel connections, 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 31 passes through the first voltage output end 11 and power supply and zero Phase intake circuit 1 is connected, and the first control signal input 32 is produced by the first signal control output end 21 with 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 is as shown in figure 5, U3A in-phase input end and tertiary voltage output end 13 It is connected, U3A inverting input is connected with C12 and R18, and U3A output end is connected with R16, R17 and R19, R19 and C12 phases Even, U3A positive supply is connected with negative supply respectively at C11 both ends；Q1 G poles are connected with R16 and Q3 colelctor electrode, Q1 S Pole is connected with R14, R15 and R18；First control signal input 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 41 passes through second voltage output end 12 and power supply and zero phase Absorb circuit 1 to be connected, the second control signal input 42 passes through secondary signal control output end 22 and control signal generation 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, U3B in-phase input end and the 4th voltage output end 14 It is connected, U3B inverting input is connected with C12 and R25, and U3B output end is connected with R23, R24 and R26, R26 and C13 phases Even；Q2 G poles are connected with R23 and Q4 colelctor electrode, and Q2 S poles are connected with R21, R22 and R25；Second control signal input 22 are connected with R20 and R32, and the R20 other end is connected with Q4 base stage.

LED lamp (5)：It is made up of two groups of LEDs being arranged in parallel, one end and the power supply and zero phase intake circuit (1) be connected, the other end of one of which LED is connected with the first controlled constant current circuit (3), another group of LED it is another End is connected with the second controlled constant current circuit (4).

The present embodiment in use, comprises the following steps：

The first via RC step-down rectifying circuits that S2, power supply form via F1, R0, C1, R1, D1, first via direct current is formed, Current limliting is depressured through R27, R28, by D4 voltage stabilizings, is filtered through C5, C6, obtains 12V VCC burning voltages, is the first controlled constant current electricity Road provides voltage；For 12V voltages through U1 voltage stabilizings, C7, C8 filtering, the 5V stablized vdd voltage, are control signal generation circuit Voltage is provided；5V voltage R7,8R, 9R, R10, R11, R12 partial pressures, obtain 500mV constant current reference voltage, are the second controlled perseverance Current circuit provides voltage；

S3, the another way power supply through F1, R0 produce VOUT voltages, are by C2, C3, R2, R3 resistance-capacitance depressurization, D2 rectifications LED 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 electric capacity, without high-voltage electrolytic capacitor, safety patch capacitor can also be used, therefore small volume, long lifespan, reliability increase；

S4, control signal generation circuit：Zero phase signal ZC is inputted control U2 job initiation state, output end by P02 M1_CTRL and M2_CTRL control signal is controlled by ZC signals, under the control of ZC signals, can effectively change LED in pulse Inverse peak voltage and negative peak electric current during work, protect LED not breakdown；AN0, AN1 export M1_CTRL and M2_CTRL signals, such as Shown in Fig. 5, working frequency when LED is lighted is 1000Hz, in every 1ms time, it is divided into three groups of work, phase is 120 °, the first via and second group of working time are 600us, and the 3rd group is not involved in work, and then the first via and the second road are equal Work and pulse condition, its dutycycle very little, the 3rd tunnel are not added with people's work, ensure that the gap of the first via and the second paths of LEDs Time, so will not increasing for LED junction temperature is ensure that, thus it is possible to reduce by 30% or so LED junction temperature temperature；

Illustrate to be merely exemplary for the utility model, and it is nonrestrictive, and those of ordinary skill in the art understand, In the case where not departing from the spirit and scope that claim is limited, any modification, change or the equivalents that can make are all It will fall within the protection domain of utility model.

Claims

1. a kind of LED lamp zero phase absorbs circuit, it is characterised in that：Including：

Power supply and zero phase intake circuit (1)：With LED lamp (5), the first controlled constant current circuit (3), control signal generation circuit (2) it is connected with the second controlled constant current circuit (4), there are four voltage output ends；Wherein first voltage output end (11) is for being The LED lamp (5) provides voltage, and second voltage output end (12) provides voltage with for the control signal generation circuit (2), Tertiary voltage output end (13) is used to provide voltage for the first controlled constant current circuit (3), and the 4th voltage output end (14) is used In for the second controlled constant current circuit (4) provide voltage.

A kind of 2. LED lamp zero phase intake circuit according to claim 1, it is characterised in that：The power supply and zero phase Position intake circuit (1) includes fuse (F1), the first voltage-stablizer (U1), the first rectifier bridge (D1), the second rectifier bridge (D2), first Diode (D3), the second diode (D4), the first triode (Q5), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5), the 6th electric capacity (C6), the 7th electric capacity (C7), the 8th electric capacity (C8), the tenth electricity Hold (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), the tenth resistance (R10), 11 resistance (R11), the 12nd resistance (R12), the 27th resistance (R27), the 28th resistance (R28)；The decompression electricity Resistance (R0) one end is connected by the fuse (F1) with live wire, and the other end is connected with the positive pole of first diode (D3)； The positive pole of first diode (D3) passes through first electric capacity (C1) being arranged in parallel and the first resistor (R1) and institute The ac input end for stating the first rectifier bridge (D1) is connected, the positive pole of first diode (D3) by be arranged in parallel described Two electric capacity (C1), the second resistance (R1), the 3rd electric capacity (C3) and the 3rd resistor (R3) and second rectification The ac input end of bridge (D2) is connected, and the negative pole of first diode (D3) passes through the 4th resistance (R4) and described first The base stage of triode (Q5) is connected；The base stage of first triode (Q5) is grounded by the 5th resistance (R5), and described The grounded emitter of one triode (Q5), colelctor electrode and the 6th resistance (R6) and the zero phase of first triode (Q5) Output port is connected；The output head anode of second rectifier bridge (D2) is connected with LED lamp (5), second rectifier bridge (D2) output head anode is grounded by the 4th electric capacity (C4), first rectifier bridge (D1) and second rectifier bridge (D2) negative pole of output end ground connection, the output head anode of first rectifier bridge (D1) and the 27th electricity being arranged in parallel Resistance (R27) is connected with the 28th resistance (R28)；27th resistance (R27) and the described 20th described in parallel resistance The other end of eight resistance (R28) and the first controlled constant current circuit (3) and the power input of first voltage-stablizer (U1) It is connected, the power input of first voltage-stablizer (U1) and negative pole, the 5th electric capacity of second diode (D4) (C5) one end with the 6th electric capacity (C6) is connected, the positive pole of second diode (D4) and the 5th electric capacity (C5) and The other end of 6th electric capacity (C6) is connected；The power output end of first voltage-stablizer (U1) is by described in being arranged in parallel 7th electric capacity (C7) and the 8th electric capacity (C8) ground connection, the power output end of first voltage-stablizer (U1) is by being arranged in series The 7th resistance (R7), the 8th resistance (R8), the 9th resistance (R9), the tenth resistance (R10), described 11 resistance (R11) and the 12nd resistance (R12) ground connection；Tenth electric capacity (C10), the 11st resistance (R11) It is connected with the 12nd resistance (R12) with the second controlled constant current circuit (4).

A kind of 3. LED lamp zero phase intake circuit according to claim 2, it is characterised in that：The fuse (F1) For fast melting fuse；Second diode (D4) is voltage-regulator diode；First triode (Q5) is NPN type；Described Four electric capacity (C4), the 6th electric capacity (C6), the 8th electric capacity (C8) are polarized electric capacity.