CN102026447A - Daylight lamp constant current driving method and driving circuit thereof - Google Patents
Daylight lamp constant current driving method and driving circuit thereof Download PDFInfo
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- CN102026447A CN102026447A CN2010105095758A CN201010509575A CN102026447A CN 102026447 A CN102026447 A CN 102026447A CN 2010105095758 A CN2010105095758 A CN 2010105095758A CN 201010509575 A CN201010509575 A CN 201010509575A CN 102026447 A CN102026447 A CN 102026447A
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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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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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
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
Abstract
The invention discloses a daylight lamp constant current driving method which comprises the following steps: 1) setting an alternating current input end for inputting an alternating current drive power, thus alternating current is accessed; 2) setting a direct current output end for outputting a direct current drive power, thus driving of a daylight lamp is realized; and 3) setting a constant current drive control circuit for converting the accessed alternating current drive power into the direct current drive power and outputting a constant current and voltage to realize the action of the constant current driving daylight lamp, wherein one end of the constant current drive control circuit is connected with the alternating current input end, and the other end of the constant current drive control circuit is connected with the direct current output end. The invention also discloses a driving circuit for implementing the daylight lamp constant current driving method; the method provided by the invention not only can improve the utilization efficiency of electric energy, but also can ensure stability of current voltage of the drive power; and the production cost is low, and the safety performance is high; the driving circuit provided by the invention has the advantages of reasonable layout, small volume, high conversion efficiency and obvious stability of current voltage output and energy conservation effect.
Description
Technical field
The invention belongs to the drive circuit field, be specifically related to a kind of fluorescent lamp constant-current driving method and drive circuit thereof.
Background technology
The LED lamp is a kind of energy-saving and environmental protection, small size and long-life novel solid light source.Constantly be applied to the normal lighting field by popularization in recent years, because advantages such as poisonous metal, long working life such as the LED light fixture has that power consumption is low, temperature is low, not mercurous, lead, utilizing the LED lamp is the inexorable trend of following light fixture as lighting source.
Because the operating characteristic of LED itself has determined it not adopt same driving power with ordinary incandescent lamp, more existing LED lamp groups are because of being subject to the current/voltage instability of driving power, and it is not very desirable causing the life-span of LED lamp and light efficiency; Simultaneously based on the layout of traditional components and parts, the circuit relative complex, volume is excessive, and cost is higher, and be subject to electromagnetic interference, so that power output changes job insecurity, easily heating, radiation have produced a large amount of losses, and conversion efficiency is lower, and the whole energy effect is not clearly.
Summary of the invention
At above-mentioned deficiency, one of the object of the invention is, provides a kind of and can improve utilization of power efficient, can guarantee the stability of the current/voltage of driving power again, and low cost of manufacture, fluorescent lamp constant-current driving method that security performance is high;
The object of the invention also is, provide a kind of rationally distributed, volume is little, conversion efficiency is high and current/voltage output stability, the tangible drive circuit of energy-saving effect.
For achieving the above object, technical scheme provided by the present invention is:
A kind of fluorescent lamp constant-current driving method, it may further comprise the steps:
(1) ac input end is set, is used for the input AC driving power, realize incoming transport;
(2) a direct current output is set, is used for exporting the DC driven power supply, realize driving fluorescent lamp;
(3) a constant-current driving control circuit is set, the one end connects described ac input end, and the other end connects described dc output end, and the AC driven power that is used for inserting converts the DC driven power supply to, and with a constant current/voltage output, to realize the action of constant-current driving fluorescent lamp.
It also comprises the steps:
(4) circuit board of a strip is set, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
Described step (3), it specifically comprises the steps:
(31) protection and a lightning protection circuit is set, it comprises a protected location and a lightning protection unit;
(32) an EMI filter circuit is set, is used for filtering not meet other frequency interferences clutter of the frequency that sets in advance required AC driven power;
(33) rectification circuit is set, is used for converting the AC driven power after handling through described EMI filter circuit to the DC driven power supply;
(34) circuit of power factor correction is set, is used for proofreading and correct, compensating above-mentioned DC driven power supply, improve power factor to improve it, described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit;
(35) filter circuit is set, be used for according to the current/voltage that sets in advance required DC driven power supply, to carry out the adaptive action that discharges and recharges through the DC driven power supply after described circuit of power factor correction is handled, so that the current/voltage of this DC driven power supply is stable;
(36) power conversion circuit is set, it comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator;
(37) described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, the independent separately layout of power conversion circuit, and be arranged on corresponding high frequency, intermediate frequency, low frequency region according to the height of himself channel frequency; Described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, power conversion circuit are in turn connected to form the constant-current driving control circuit;
Described step (31)～(36) no sequencing.
A kind of drive circuit of above-mentioned fluorescent lamp constant-current driving method; it comprises a circuit board and is arranged on ac input end and dc output end on this circuit board; it comprises that also one is arranged on the constant-current driving control circuit on the described circuit board; described ac input end is connected with described dc output end by this constant-current driving control circuit, and described constant-current driving control circuit comprises protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit and the power conversion circuit that connects successively.
Described circuit board is strip, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
Described protection and lightning protection circuit are made up of a protected location and a lightning protection unit, and this lightning protection unit is a piezo-resistance Vz1, and it is connected on the described ac input end; Described protected location fuse is a fuse F1, and it is connected in parallel on the described ac input end.
Described EMI filter circuit comprises safety capacitor C X1, safety capacitor C X2, inductance L D1, inductance L D1, inductance L D2 and resistance R D1, and described safety capacitor C X1 links to each other with safety capacitor C X2 by described inductance L D1, resistance R D1, inductance L D2 respectively.
Described rectification circuit comprises bridge rectifier bridge heap Db1, and described filter circuit comprises an electrochemical capacitor C1.
Described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit, this resistance unit comprises resistance R 1～R3, the described paddy circuit unit of filling out comprises diode D1～D2, diode D4, electrochemical capacitor Ce1 and electrochemical capacitor Ce2, described electrochemical capacitor Ce1 and resistance R 1 parallel connection, the one end respectively with described diode D2, diode D1 links to each other, the other end links to each other with described diode D4, described resistance R 3 and electrochemical capacitor Ce2 parallel connection, the one end links to each other with described diode D2, the other end respectively with described diode D4, resistance R 2 links to each other, and this resistance R 2 links to each other with described diode D1.
Described power conversion circuit comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator, and described integral control circuit comprises a constant current control chip U1, voltage-stabiliser tube Dz1, resistance R 4～R6, resistance R 8, resistance R t1, detects resistance R s1～Rs2 and capacitor C 2～C4; Described band grid leadage circuit comprises a diode D5 and a resistance R 7; Described switching circuit comprises a MOS switching tube Q1; Described accumulator comprises high frequency transformer LM1～LM2, inductance L E1, diode D3, capacitor C 5～C6 and capacitor C o1.
Beneficial effect of the present invention is: method provided by the invention can improve utilization of power efficient, can guarantee the stability of the current/voltage of driving power again, and low cost of manufacture, security performance height; Drive circuit provided by the invention rationally distributed, volume is little, conversion efficiency is high and current/voltage output stability, energy-saving effect are obvious.
Described EMI filter circuit is taked the symmetry layout, filtering stage and power stage are symmetricly set on the both sides of described output stage, make output stage and power stage away from filtering stage, have reduced the coupling of filtering stage, avoided output stage and power stage near, thereby cause noise can couple directly to electrical network.Simultaneously, the wiring that the safety capacitor C X1 of EMI filtering stage, the pad of safety capacitor C X2 are drawn will be accomplished short as far as possible, so that reduce ESL, improves Electro Magnetic Compatibility.
Described protection and lightning protection circuit comprise protected location and lightning protection unit, protected location is a fuse F1, this fuse F1 is used for detecting the operating current of power supply, and this fuse F1 that can fuse automatically when meeting or exceeding the rated current of fuse F1 plays the effect of protective circuit; Lightning protection unit is a piezo-resistance Vz1, and when the thunder and lightning high pressure entered circuit, piezo-resistance Vz1 loop resistance diminished, and forms the thunder and lightning high tension loop, thus the power circuit of protection back;
Described EMI filter circuit is a characteristic of utilizing inductance and electric capacity, making frequency is that alternating current about 50Hz/60Hz can pass through filter smoothly, and with the interference noise filtering of other frequency, thereby the high-frequency impulse of the extraneous electrical network of filtering reduces power supply electromagnetic interference to external world itself simultaneously in addition to the interference of power supply;
Described rectification circuit adopts bridge rectifier, and the unilateal conduction performance of the internal body diodes by bridge rectifier bridge heap Db1 is transformed into the DC driven power supply to the AC driven power of importing;
Described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit, the described paddy circuit of filling out is a kind of passive power factor correcting circuit, utilize the angle of flow that the paddy circuit increases considerably rectifying tube of filling out of rectifier bridge back, by filling and leading up the valley point, input current is become from spike approach sinusoidal wave waveform, thereby the raising power factor significantly reduces total harmonic distortion.Compare with traditional inductance type passive power factor correcting circuit, circuit is simple, and the power factor compensation effect is remarkable, and does not need to use the big inductor of the big heavy of volume in input circuit; Be equipped with described resistance unit, this resistance unit comprises resistance R 1～R3, can further improve power factor, and effect is obvious;
Filter circuit adopts an electrochemical capacitor C1, utilizes the function that discharges and recharges of this electrochemical capacitor C1, and allows it charge when voltage is high, discharge when voltage is low, thus obtain a DC driven power supply with metastable current/voltage;
Integral control circuit adopts constant current control chip U1, resistance R 4～R6, resistance R 8 and voltage-stabiliser tube Dz1, capacitor C 3 is formed the power supply circuits of control chip, detecting resistance R s1～Rs2 is that output current detects resistance, in order to detect the output peak current, the 4th pin of constant current control chip U1 is the drain electrode of chip internal power switch, in order to control the break-make of outside described switching circuit, constant current control chip U1 is operated in the depressurizing system of continuous current pattern, by the detected output peak current of current sense resistor, control the pulse duration of the 4th pin output pwm pulse, thereby reach the ON time of the outside MOS switching tube Q1 of control, thereby stablize output current.Described switching circuit plays the high frequency on-off action of output loop.
Be equipped with band grid leadage circuit, the parasitism of the MOS switching tube Q1 grid parasitic capacitance storage that is used for releasing
Electric charge produces misleading because of spurious charge to prevent MOS switching tube Q1.
Be equipped with accumulator, when MOS switching tube Q1 conducting, major loop passes through LM1, the LM2 conducting, LM1, the LM2 stored energy, provide energy to load, when the MOS switching tube turn-offed, the energy of high frequency transformer LM1～LM2 storage constituted the loop by inductance L E1, diode D1, and high frequency transformer LM1～LM2 releases energy, provide energy to load, the master control chip is by the ON time of control MOS switching tube Q1, thus the time of controlling high frequency transformer LM1～LM2 stored energy and releasing energy, thus reach the stable of output.Described high frequency transformer LM1～LM2 is the EPC13 high frequency transformer, replaces intrinsic traditional inductance, makes the circuit finished product behind the plastic-aluminum pipe of packing into, and inductance value is unaffected, and then effectively stablizes power output.
Below in conjunction with drawings and Examples, the invention will be further described.
Description of drawings
Fig. 1 is a circuit theory schematic diagram of the present invention.
Embodiment
Embodiment: referring to Fig. 1, present embodiment provides a kind of fluorescent lamp constant-current driving method, and it may further comprise the steps:
(1) ac input end is set, is used for the input AC driving power, realize incoming transport;
(2) a direct current output is set, is used for exporting the DC driven power supply, realize driving fluorescent lamp;
(3) a constant-current driving control circuit is set, the one end connects described ac input end, and the other end connects described dc output end, and the AC driven power that is used for inserting converts the DC driven power supply to, and with a constant current/voltage output, to realize the action of constant-current driving sight lamp.
(4) circuit board of a strip is set, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
Described step (3), it specifically comprises the steps:
(31) protection and a lightning protection circuit is set, it comprises a protected location and a lightning protection unit;
(32) an EMI filter circuit is set, is used for filtering not meet other frequency interferences clutter of the frequency that sets in advance required AC driven power;
(33) rectification circuit is set, is used for converting the AC driven power after handling through described EMI filter circuit to the DC driven power supply;
(34) circuit of power factor correction is set, is used for proofreading and correct, compensating above-mentioned DC driven power supply, improve power factor to improve it, described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit;
(35) filter circuit is set, be used for according to the current/voltage that sets in advance required DC driven power supply, to carry out the adaptive action that discharges and recharges through the DC driven power supply after described circuit of power factor correction is handled, so that the current/voltage of this DC driven power supply is stable;
(36) power conversion circuit is set, it comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator;
(37) described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, the independent separately layout of power conversion circuit, and be arranged on corresponding high frequency, intermediate frequency, low frequency region according to the height of himself channel frequency; Described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, power conversion circuit are in turn connected to form the constant-current driving control circuit;
Described step (31)～(36) no sequencing.
A kind of drive circuit of implementing above-mentioned fluorescent lamp constant-current driving method; it comprises a circuit board and is arranged on ac input end and dc output end on this circuit board; it comprises that also one is arranged on the constant-current driving control circuit on the described circuit board; described ac input end is connected with described dc output end by this constant-current driving control circuit, and described constant-current driving control circuit comprises protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit and the power conversion circuit that connects successively.
Described circuit board is strip, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
Described protection and lightning protection circuit are made up of a protected location and a lightning protection unit, and this lightning protection unit is a piezo-resistance Vz1, and it is connected on the described ac input end; Described protected location fuse is a fuse F1, and it is connected in parallel on the described ac input end.
Described EMI filter circuit comprises safety capacitor C X1, safety capacitor C X2, inductance L D1, inductance L D1, inductance L D2 and resistance R D1, and described safety capacitor C X1 links to each other with safety capacitor C X2 by described inductance L D1, resistance R D1, inductance L D2 respectively.
Described rectification circuit comprises bridge rectifier bridge heap Db1, and described filter circuit comprises an electrochemical capacitor C1.
Described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit, this resistance unit comprises resistance R 1～R3, the described paddy circuit unit of filling out comprises diode D1～D2, diode D4, electrochemical capacitor Ce1 and electrochemical capacitor Ce2, described electrochemical capacitor Ce1 and resistance R 1 parallel connection, the one end respectively with described diode D2, diode D1 links to each other, the other end links to each other with described diode D4, described resistance R 3 and electrochemical capacitor Ce2 parallel connection, the one end links to each other with described diode D2, the other end respectively with described diode D4, resistance R 2 links to each other, and this resistance R 2 links to each other with described diode D1.
Described power conversion circuit comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator, and described integral control circuit comprises a constant current control chip U1, voltage-stabiliser tube Dz1, resistance R 4～R6, resistance R 8, resistance R t1, detects resistance R s1～Rs2 and capacitor C 2～C4; Described band grid leadage circuit comprises a diode D5 and a resistance R 7; Described switching circuit comprises a MOS switching tube Q1; Described accumulator comprises high frequency transformer LM1～LM2, inductance L E1, diode D3, capacitor C 5～C6 and capacitor C o1.
The components and parts of described constant-current driving control circuit all need be arranged on the placed layer of described circuit board; and be arranged on corresponding high frequency, intermediate frequency, low frequency region according to the height of himself channel frequency of protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit and power conversion circuit; can make the components and parts between each circuit form independent layout like this; be to separate layout between the low-and high-frequency circuit; avoided the interference between the different circuit; interference between the low-and high-frequency; the stability of raising work can be tested by EMI.
The components and parts of described constant-current driving control circuit are parallel to each other as far as possible and are arranged in order along the long side direction of this circuit board, so more can increase the antijamming capability of circuit, and are simultaneously beautiful and clean, are easy to produce, and reduce production costs.
Described EMI filter circuit is taked the symmetry layout, filtering stage and power stage are symmetricly set on the both sides of described output stage, make output stage and power stage away from filtering stage, have reduced the coupling of filtering stage, avoided output stage and power stage near, thereby cause noise can couple directly to electrical network.Simultaneously, the wiring that the safety capacitor C X1 of EMI filtering stage, the pad of safety capacitor C X2 are drawn will be accomplished short as far as possible, so that reduce ESL, improves Electro Magnetic Compatibility.
During work, behind ac input end incoming transport electricity, at first by protected location and lightning protection unit in protection and the lightning protection circuit, protected location is a fuse F1, this fuse F1 is used for detecting the operating current of power supply, this fuse F1 that can fuse automatically when meeting or exceeding the rated current of fuse F1 plays the effect of protective circuit; Lightning protection unit is a piezo-resistance Vz1, and when the thunder and lightning high pressure entered circuit, piezo-resistance Vz1 loop resistance diminished, and forms the thunder and lightning high tension loop, thus the power circuit of protection back;
AC driven power enters the EMI filter circuit behind overprotection and lightning protection circuit, the EMI filter circuit is a characteristic of utilizing inductance and electric capacity, making frequency is that alternating current about 50Hz/60Hz can pass through filter smoothly, and with the interference noise filtering of other frequency, thereby the high-frequency impulse of the extraneous electrical network of filtering reduces power supply electromagnetic interference to external world itself simultaneously in addition to the interference of power supply;
AC driven power enters rectification circuit after by the EMI filter circuit, and this rectification circuit adopts bridge rectifier, and the unilateal conduction performance of the internal body diodes by bridge rectifier bridge heap Db1 is transformed into the DC driven power supply to the AC driven power of importing;
DC driven power supply ingoing power factor correcting circuit, this circuit of power factor correction comprises fills out paddy circuit unit and resistance unit, this fills out the paddy circuit is a kind of passive power factor correcting circuit, utilize the angle of flow that the paddy circuit increases considerably rectifying tube of filling out of rectifier bridge back, by filling and leading up the valley point, input current is become from spike approach sinusoidal wave waveform, thereby improve power factor, significantly reduce total harmonic distortion.Compare with traditional inductance type passive power factor correcting circuit, circuit is simple, and the power factor compensation effect is remarkable, and does not need to use the big inductor of the big heavy of volume in input circuit; Be equipped with resistance unit, this resistance unit comprises resistance R 1～R3, can further improve power factor, and effect is obvious;
The DC driven power supply enters filter circuit after handling through the circuit of power factor correction circuit of power factor correction, filter circuit adopts an electrochemical capacitor C1, utilize the function that discharges and recharges of this electrochemical capacitor C1, allow it when voltage is high, charge, discharge when voltage is low, thus a DC driven power supply obtained with metastable current/voltage;
The DC driven power supply is wave circuit ingoing power translation circuit after filtration, and this power conversion circuit is taked the BUCK topological structure, and it comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator; Integral control circuit adopts constant current control chip U1, resistance R 4～R6, resistance R 8 and voltage-stabiliser tube Dz1, capacitor C 3 is formed the power supply circuits of control chip, detecting resistance R s1～Rs2 is that output current detects resistance, in order to detect the output peak current, the 4th pin of constant current control chip U1 is the drain electrode of chip internal power switch, in order to control the break-make of outside described switching circuit, constant current control chip U1 is operated in the depressurizing system of continuous current pattern, by the detected output peak current of current sense resistor, control the pulse duration of the 4th pin output pwm pulse, thereby reach the ON time of the outside MOS switching tube Q1 of control, thereby stablize output current.Described switching circuit plays the high frequency on-off action of output loop.
Be equipped with band grid leadage circuit, the spurious charge of the MOS switching tube Q1 grid parasitic capacitance storage that is used for releasing produces misleading because of spurious charge to prevent MOS switching tube Q1.
Be equipped with accumulator, when MOS switching tube Q1 conducting, major loop passes through LM1, the LM2 conducting, LM1, the LM2 stored energy, provide energy to load, when the MOS switching tube turn-offed, the energy of high frequency transformer LM1～LM2 storage constituted the loop by inductance L E1, diode D1, and high frequency transformer LM1～LM2 releases energy, provide energy to load, the master control chip is by the ON time of control MOS switching tube Q1, thus the time of controlling high frequency transformer LM1～LM2 stored energy and releasing energy, thus reach the stable of output.Described high frequency transformer LM1～LM2 is the EPC13 high frequency transformer, replaces intrinsic traditional inductance, makes the circuit finished product behind the plastic-aluminum pipe of packing into, and inductance value is unaffected, and then effectively stablizes power output.
As described in the above embodiment of the present invention, adopt technical characterictic same or similar and other driving method and the drive circuit that obtain, all in protection range of the present invention with it.
Claims (10)
1. fluorescent lamp constant-current driving method is characterized in that it may further comprise the steps:
(1) ac input end is set, is used for the input AC driving power, realize incoming transport;
(2) a direct current output is set, is used for exporting the DC driven power supply, realize driving fluorescent lamp;
(3) a constant-current driving control circuit is set, the one end connects described ac input end, and the other end connects described dc output end, and the AC driven power that is used for inserting converts the DC driven power supply to, and with a constant current/voltage output, to realize the action of constant-current driving fluorescent lamp.
2. fluorescent lamp constant-current driving method according to claim 1 is characterized in that it also comprises the steps:
(4) circuit board of a strip is set, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
3. fluorescent lamp constant-current driving method according to claim 1 is characterized in that, described step (3), and it specifically comprises the steps:
(31) protection and a lightning protection circuit is set, it comprises a protected location and a lightning protection unit;
(32) an EMI filter circuit is set, is used for filtering not meet other frequency interferences clutter of the frequency that sets in advance required AC driven power;
(33) rectification circuit is set, is used for converting the AC driven power after handling through described EMI filter circuit to the DC driven power supply;
(34) circuit of power factor correction is set, is used for proofreading and correct, compensating above-mentioned DC driven power supply, improve power factor to improve it, described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit;
(35) filter circuit is set, be used for according to the current/voltage that sets in advance required DC driven power supply, to carry out the adaptive action that discharges and recharges through the DC driven power supply after described circuit of power factor correction is handled, so that the current/voltage of this DC driven power supply is stable;
(36) power conversion circuit is set, it comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator;
(37) described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, the independent separately layout of power conversion circuit, and be arranged on corresponding high frequency, intermediate frequency, low frequency region according to the height of himself channel frequency; Described protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit, power conversion circuit are in turn connected to form the constant-current driving control circuit;
Described step (31)～(36) no sequencing.
4. drive circuit of implementing the described fluorescent lamp constant-current driving of claim 1 method; it comprises a circuit board and is arranged on ac input end and dc output end on this circuit board; it is characterized in that; it comprises that also one is arranged on the constant-current driving control circuit on the described circuit board; described ac input end is connected with described dc output end by this constant-current driving control circuit, and described constant-current driving control circuit comprises protection and lightning protection circuit, EMI filter circuit, rectification circuit, circuit of power factor correction, filter circuit and the power conversion circuit that connects successively.
5. drive circuit according to claim 4, it is characterized in that, described circuit board is strip, its by placed layer, go up wiring layer, wiring layer is stacked successively down forms, described ac input end and dc output end are symmetricly set on the two ends of described circuit board, the components and parts of described constant-current driving control circuit all are arranged on the placed layer of described circuit board, and are parallel to each other, are arranged in order along the long side direction of this circuit board.
6. drive circuit according to claim 4 is characterized in that, described protection and lightning protection circuit are made up of a protected location and a lightning protection unit, and this lightning protection unit is a piezo-resistance Vz1, and it is connected on the described ac input end; Described protected location fuse is a fuse F1, and it is connected in parallel on the described ac input end.
7. drive circuit according to claim 4, it is characterized in that, described EMI filter circuit comprises safety capacitor C X1, safety capacitor C X2, inductance L D1, inductance L D1, inductance L D2 and resistance R D1, and described safety capacitor C X1 links to each other with safety capacitor C X2 by described inductance L D1, resistance R D1, inductance L D2 respectively.
8. drive circuit according to claim 4 is characterized in that, described rectification circuit comprises bridge rectifier bridge heap Db1, and described filter circuit comprises an electrochemical capacitor C1.
9. drive circuit according to claim 4, it is characterized in that, described circuit of power factor correction comprises fills out paddy circuit unit and resistance unit, this resistance unit comprises resistance R 1～R3, the described paddy circuit unit of filling out comprises diode D1～D2, diode D4, electrochemical capacitor Ce1 and electrochemical capacitor Ce2, described electrochemical capacitor Ce1 and resistance R 1 parallel connection, the one end respectively with described diode D2, diode D1 links to each other, the other end links to each other with described diode D4, described resistance R 3 and electrochemical capacitor Ce2 parallel connection, the one end links to each other with described diode D2, the other end respectively with described diode D4, resistance R 2 links to each other, and this resistance R 2 links to each other with described diode D1.
10. drive circuit according to claim 4, it is characterized in that, described power conversion circuit comprises an integral control circuit, a band grid leadage circuit, a switching circuit and an accumulator, and described integral control circuit comprises a constant current control chip U1, voltage-stabiliser tube Dz1, resistance R 4～R6, resistance R 8, resistance R t1, detects resistance R s1～Rs2 and capacitor C 2～C4; Described band grid leadage circuit comprises a diode D5 and a resistance R 7; Described switching circuit comprises a MOS switching tube Q1; Described accumulator comprises high frequency transformer LM1～LM2, inductance L E1, diode D3, capacitor C 5～C6 and capacitor C o1.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105095758A CN102026447A (en) | 2010-10-18 | 2010-10-18 | Daylight lamp constant current driving method and driving circuit thereof |
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| CN2010105095758A CN102026447A (en) | 2010-10-18 | 2010-10-18 | Daylight lamp constant current driving method and driving circuit thereof |
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| CN102026447A true CN102026447A (en) | 2011-04-20 |
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| CN109412117A (en) * | 2018-12-06 | 2019-03-01 | 广州金升阳科技有限公司 | A kind of protection circuit against input over-voltage |
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Application publication date: 20110420 |