CN208190964U - LED drive circuit and LED lamp - Google Patents
LED drive circuit and LED lamp Download PDFInfo
- Publication number
- CN208190964U CN208190964U CN201820053293.3U CN201820053293U CN208190964U CN 208190964 U CN208190964 U CN 208190964U CN 201820053293 U CN201820053293 U CN 201820053293U CN 208190964 U CN208190964 U CN 208190964U
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitor
- submodule
- module
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The utility model provides a kind of LED drive circuit and LED lamp, wherein LED drive circuit includes: rectification filtering module, and the ac voltage rectifier for that will input is pulsating dc voltage；Power factor correction module is connected to rectification filtering module, and power factor correction module is for improving driving power factor；Linear constant current module, is connected to power factor correction module, for limiting the peak value of driving current；First electrolytic capacitor, one end of the first electrolytic capacitor are set between power factor correction module and linear constant current module, and the other end ground connection of the first electrolytic capacitor is used in peak voltage to LED load module for power supply.By the technical solution of the utility model, LED load light bulb can be under the premise of guarantee power factor be greater than 0.9, within reduction stroboscopic index to 20%, to achieve the purpose that protect eyes.
Description
Technical field
The utility model relates to driving circuit fields, in particular to a kind of LED drive circuit and a kind of LED lamp.
Background technique
LED has many advantages, such as that energy-saving and environmental protection, service life are long, is widely used in industry, agriculture as a kind of new type of solid state light source
Industry, the fields such as commercial lighting.At present it is generally believed that the ideal operation mode of LED is driven using constant-current supply, if normal
LED is lighted, a power adapter is needed, to realize rectification and decompression/constant current function, LED in the related technology drives electricity
Road has the following deficiencies:
(1) power factor 0.5 is hereinafter, harmonic wave is greater than 25%, and pollution power grid, when input voltage reduces, lamps and lanterns cannot be normal
Work does not accomplish that full voltage works normally；
(2) alternating current is fluctuated according to certain frequency periodicity, due to the presence of LED itself cut-in voltage, only
Instantaneous voltage be more than cut-in voltage when, LED can just be connected and shine, conversely, LED be off it is non-luminous.The prior art
This circuit makes the luminous efficiency of LED very low, stroboscopic index 100%, and the bright eyes to people of sending generate stimulation and wound
Evil.
Utility model content
The utility model aims to solve at least one of technical problems existing in the prior art or related technologies.
For this purpose, a purpose of the utility model is to propose a kind of LED drive circuit.
For this purpose, another purpose of the utility model is to propose a kind of LED lamp.
To achieve the above object, the embodiment of the first aspect of the utility model provides a kind of LED drive circuit, packet
Include: rectification filtering module, the ac voltage rectifier for that will input are pulsating dc voltage；Power factor correction module, series connection
It is connected to rectification filtering module, power factor correction module is for improving driving power factor；Linear constant current module is connected in series
To power factor correction module, for limiting the peak value of driving current；First electrolytic capacitor, one end setting of the first electrolytic capacitor
Between power factor correction module and linear constant current module, the other end of the first electrolytic capacitor is grounded, in peak voltage
When to LED load module for power supply.
In the technical scheme, the first electrolysis of setting electricity between setting power factor correction module and linear constant current module
Hold, on the one hand, the power factor of driving circuit is improved by the way that power factor correction module is arranged, on the other hand, by linear
Constant flow module limits the maximum current that LED load is flowed through in driving circuit, to prevent LED load from overcurrent occur, to be promoted
The stability that LED load is shown, in another aspect, by the first electrolytic capacitor of setting, when driving voltage is in trough state,
It discharges LED load, to maintain the continuous illumination of LED load.
According to the LED drive circuit that the technical program proposes, can satisfy in low pressure 85V, the input voltage of high pressure 277V
The use demand of lower LED stabilized illumination.
For stroboscopic problem, has its source in ripple voltage on LED or ripple current is excessive, by rectification filtering module
Voltage be in trough when, by the first electrolytic capacitor discharge, the normal luminous of LED load is maintained, according to the function of LED load
Rate rotates suitable first electrolytic capacitor value, to guarantee not occurring biggish ripple voltage or ripple current in LED load,
It realizes without stroboscopic.
In addition, the LED drive circuit in above-described embodiment provided by the utility model can also have following supplementary technology
Feature:
In the above-mentioned technical solutions, it is preferable that power factor correction module includes: transformation submodule, transformation submodule
Input terminal is connected to the output end of rectification filtering module, for executing transformation operation to pulsating dc voltage；Submodule is buffered, even
It is connected to the first output end of transformation submodule；Correction module is respectively connected to the first output end of transformation submodule, transformation submodule
The second output terminal of block and the first output end of buffer sublayer module, for executing PFC.
In the technical scheme, by the way that power factor correction module to be set as including transformation submodule, buffering submodule
And correction module, the DC voltage generated after current rectifying and wave filtering circuit execute transformation operation after transformation submodule,
And directly input correction module or by buffering submodule after input correction module, to realize the promotion of power factor.
In any of the above-described technical solution, it is preferable that transformation submodule includes: transformer, the first input of transformer
End is connected to the output end of rectification filtering module, and the first output end of the second input end grounding of transformer, transformer is connected to
Submodule is buffered, the second output terminal of transformer is the first output end of transformation submodule, is connected to the one of the first parallel resistance
End, the other end of the first parallel resistance are grounded after successively connecting with first capacitor, zener diode；The first series connection being connected in series
Resistance and the second electrolytic capacitor, the input terminal of the first series resistance are connected to the output end of rectification filtering module, the second electrolysis electricity
The output end of appearance is grounded；The anode of first diode, first diode is set between first capacitor and zener diode, and first
The cathode of diode is set between the first series resistance and the second electrolytic capacitor, using the second output as transformation submodule
End.
In the technical scheme, by the way that transformer is arranged, transformation is executed with the DC voltage exported to rectification filtering module
Operation, to realize the storage and transmission of energy.
Wherein, the first parallel resistance may include three resistance in parallel, and the first series resistance may include two series connection
Resistance.
In any of the above-described technical solution, it is preferable that correction module includes: that factor correcting controls chip, including first
End, second end, third end, the 4th end, the 5th end and the 6th end, first end are grounded after connecting with first resistor with the second capacitor,
Second end is grounded, and is grounded after third end series connection third capacitor, the 4th end is connected to metal-oxide-semiconductor by second resistance and 3rd resistor
Grid, the 5th end are connected to the cathode of first diode, and six end connecting extremely buffers the first output end of submodule, metal-oxide-semiconductor
Drain electrode is connected to the first output end of transformer, one end ground connection of the source electrode of metal-oxide-semiconductor and the second parallel resistance, the second parallel resistance
The other end ground connection, be additionally provided with the 4th resistance between the other end and third end of the second parallel resistance.
In the technical scheme, by the way that Power Factor Correction Control chip is arranged, to pass through Power Factor Correction Control core
Piece controls to adjust power factor, controls metal-oxide-semiconductor by the output voltage values of the 6th pin as switching tube by setting metal-oxide-semiconductor
Conducting and cut-off charge to the first electrolytic capacitor with realizing in cut-off, flow through third pin by the way that the 4th resistance detection is arranged
Current signal, to detect whether to occur over-current signal, and detect there is over-current signal when, pass through the control of the 6th pin and cut
Only MOS is managed, to realize overcurrent protection.
Wherein, the first pin (COMP) is that the second pin (GND) is ground pin, and third pin (CS/ZCP) is for pressing down
High-frequency noise processed, the 4th pin are NV pin, and the 5th pin (VCC) is used to provide the operating voltage of controller and control circuit,
6th pin is GD pin.
In any of the above-described technical solution, it is preferable that power factor correction module further include: the 4th capacitor, the 4th capacitor
One end be connected to control chip first end, the 4th capacitor the other end ground connection；Second diode, the anode of the second diode
It is connected to grid, the cathode of the second diode is set between second resistance and 3rd resistor；5th resistance, the one of the 5th resistance
End is connected to the anode of the second diode, and the other end of the 5th resistance is connected to source electrode.
In any of the above-described technical solution, it is preferable that buffering submodule includes: third diode, third diode
Anode is connected to the first output end of transformer, and the cathode of third diode is determined as buffering the second output terminal of submodule, and
It is connected to linear constant current module；Second series resistance, one end of the second series resistance are connected to the cathode of third diode, and second
The other end of series resistance is determined as buffering the first output end of submodule；6th resistance, one end of the 6th resistance are connected to
The other end of two series resistances, the other end ground connection of the 6th resistance；5th capacitor is connect with the 6th resistor coupled in parallel.
In the technical scheme, when being used to buffer MOS official's shutdown by the buffer loop in buffering submodule, leakage inductance is released
The high voltage released realizes overcurrent in the over-current signal for detecting metal-oxide-semiconductor, that is, to block the output signal of control chip
Protection.
In any of the above-described technical solution, it is preferable that linear constant current module includes: third electrolytic capacitor；Third electrolysis electricity
One end of appearance is connected to the cathode of third diode, the other end ground connection of third electrolytic capacitor；Two current constant control cores in parallel
Piece, current constant control chip include OUT pin, GND pin and REXT pin, and REXT is grounded after connecting with divider resistance, GND pin
Ground connection；LED load, one end of LED load are connected to one end of third electrolytic capacitor, and the other end of LED load is connected to OUT
Pin.
In the technical scheme, by the way that third electrolytic capacitor, the charging electricity of third electrolytic capacitor during the charging process is arranged
Stream is at a steady state value, and two current constant control chips can be considered as two current constant control chips, two current constant control cores
The output control terminal of piece is connected with LED load, to realize the control to shine to LED load, wherein manages in OUT pin and GND
There are voltage differences between foot, and when pressure difference is not higher than the constant current threshold voltage of chip, the electric current for flowing through chip is non-constant, electric current meeting
Increase as the pressure drop between OUT pin and GND pin increases, when the voltage difference between OUT pin and GND pin is higher than core
After the constant current threshold voltage of piece, constant current operation state is presented in chip, that is, the electric current for flowing through chip is held essentially constant, thus into one
Step reduces the ripple current in LED load, to improve the light efficiency of LED load and the service life of LED load.
In any of the above-described technical solution, it is preferable that rectification filtering module includes: rectification submodule, comprising: the first common mode
Inductance, the first input end of the first common mode inductance are connected to the zero line of alternating voltage by fuse, the first common mode inductance
Second input terminal is connected to the zero line side of alternating voltage；The first input end of second common mode inductance, the second common mode inductance is connected to
First output end of the first common mode inductance, the second input terminal of the second common mode inductance are connected to the second output of the first common mode inductance
End.
In the technical scheme, by the way that common mode inductance is arranged, to eliminate common mode interference, rectifier bridge stack passes through fuse and city
Electrical fire line L is connected, and since fuse has certain resistance value, peak voltage can be absorbed, have Anti-surging effect.
Wherein, when the electric current that cartridge fuse passes through is more than 1.25~1.5 times of rated current, the fuse of cartridge fuse will be quick
Fusing.
In any of the above-described technical solution, it is preferable that rectification submodule further include: differential mode capacitor is connected in parallel as the
Between the first input end of one common mode inductance and the second input terminal；Variable resistance is connected in parallel with differential mode capacitor；Rectifier bridge stack,
The first input end of rectifier bridge stack is connected to the first output end of the second common mode inductance, and the second input terminal of rectifier bridge stack is connected to
The second output terminal of second common mode inductance, the first output end ground connection of rectifier bridge stack.
It in the technical scheme,, can power transformation to filter out the interference of the higher hamonic wave in power supply by the way that differential mode capacitor is arranged
Resistance is negative tempperature coefficient thermistor, for the moment current-limiting protection that is powered.
In addition, rectifier bridge stack is full rectifier bridge stack, connected by 4 rectifier diodes by the form of full-wave bridge rectifier circuit
And the rectifier bridge stack being packaged as a whole, and two input terminals and two output ends are respectively provided with, two input terminals pass through common mode electricity
Sense access alternating current, two output ends are respectively that direct current output anode and earthing pole, DC output end are connected to filtering submodule.
In any of the above-described technical solution, it is preferable that rectification filtering module includes: filtering submodule, comprising: filtered electrical
Sense, one end of filter inductance are connected to the second output terminal of rectifier bridge stack, and the other end of inductance is determined as rectification filtering module
Output end；First filter capacitor, one end of the first filter capacitor are connected to one end of filter inductance, the first filter capacitor it is another
End ground connection；Second filter capacitor, one end of the second filter capacitor are connected to the other end of filter inductance, the second filter capacitor it is another
One end ground connection；7th resistance, is arranged in parallel with filter inductance.
In the technical scheme, by setting filter inductance and filter capacitor, to reduce the ripple in driving circuit.
Technical solution according to the present utility model, LED load light bulb can be in premise of the guarantee power factor greater than 0.9
Under, within reduction stroboscopic index to 20%, to achieve the purpose that protect eyes.
The embodiment of the second aspect of the utility model provides a kind of LED lamp, the first party including the utility model
LED drive circuit described in any one of the embodiment in face.
The additional aspect and advantage of the utility model will become obviously in following description section, or practical new by this
The practice of type is recognized.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of the LED drive circuit of one embodiment according to the present utility model；
Fig. 2 shows the structural schematic diagrams of the LED drive circuit of another embodiment according to the present utility model.
Specific embodiment
In order to be more clearly understood that the above objects, features, and advantages of the utility model, with reference to the accompanying drawing and have
The utility model is further described in detail in body embodiment.It should be noted that in the absence of conflict, this Shen
The feature in embodiment and embodiment please can be combined with each other.
Many details are explained in the following description in order to fully understand the utility model, still, this is practical
Novel to be implemented using other than the one described here other modes, therefore, the protection scope of the utility model is simultaneously
It is not limited to the limitation of following public specific embodiment.
As shown in Figure 1, the LED drive circuit of one embodiment according to the present utility model, comprising: AC power source, exchange
Power supply is for providing alternating voltage；Rectification filtering module 10, the ac voltage rectifier for that will input are pulsating dc voltage；Function
Rate factor correcting module 20 is connected to rectification filtering module 10, and power factor correction module 20 is for improving driving power
Factor；Linear constant current module 30 is connected to power factor correction module 20, for limiting the peak value of driving current；First
One end of electrolytic capacitor 40, the first electrolytic capacitor 40 is set between power factor correction module 20 and linear constant current module 30,
The other end of first electrolytic capacitor 40 is grounded, and is used in peak voltage to LED power load modules.
In the technical scheme, the first electricity of setting between setting power factor correction module 20 and linear constant current module 30
Solve capacitor 40, on the one hand, the power factor of driving circuit is improved by the way that power factor correction module 20 is arranged, on the other hand,
The maximum current that LED load is flowed through in driving circuit is limited, by linear constant current module 30 to prevent LED load from occurring
Stream, so that the stability of LED load display is improved, in another aspect, by the first electrolytic capacitor 40 of setting, in driving voltage
When in trough state, discharge LED load, to maintain the continuous illumination of LED load.
According to the LED drive circuit that the technical program proposes, can satisfy in low pressure 85V, the input voltage of high pressure 277V
The use demand of lower LED stabilized illumination.
For stroboscopic problem, has its source in ripple voltage on LED or ripple current is excessive, by rectification filtering module
10 voltage is discharged by the first electrolytic capacitor 40 when being in trough, maintains the normal luminous of LED load, negative according to LED
The power of load rotates suitable first electrolytic capacitor, 40 value, with guarantee not occurring in LED load 312 biggish ripple voltage or
Person's ripple current is realized without stroboscopic.
In addition, the LED drive circuit in above-described embodiment provided by the utility model can also have following supplementary technology
Feature:
In the above-mentioned technical solutions, it is preferable that power factor correction module includes: transformation submodule, transformation submodule
Input terminal is connected to the output end of rectification filtering module 10, for executing transformation operation to pulsating dc voltage；Submodule is buffered,
It is connected to the first output end of transformation submodule；Correction module is respectively connected to the first output end of transformation submodule, transformation
The second output terminal of module and the first output end of buffer sublayer module, for executing PFC.
In the technical scheme, by the way that power factor correction module to be set as including transformation submodule, buffering submodule
And correction module, the DC voltage generated after current rectifying and wave filtering circuit execute transformation operation after transformation submodule,
And directly input correction module or by buffering submodule after input correction module, to realize the promotion of power factor.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that transformation submodule includes: transformer 202, transformation
The first input end of device 202 is connected to the output end of rectification filtering module 10, the second input end grounding of transformer 202, transformation
First output end of device 202 is connected to buffering submodule, and the second output terminal of transformer 202 is the first output of transformation submodule
End, is connected to one end of the first parallel resistance 204, the other end of the first parallel resistance 204 successively with first capacitor 206, pressure stabilizing
Diode 208 is grounded after connecting；The first series resistance 210 being connected in series and the second electrolytic capacitor 212, the first series resistance
210 input terminal is connected to the output end of rectification filtering module 10, the output end ground connection of the second electrolytic capacitor 212；One or two pole
Pipe 214, the anode of first diode 214 are set between first capacitor 206 and zener diode 208, first diode 214
Cathode is set between the first series resistance 210 and the second electrolytic capacitor 212, using the second output terminal as transformation submodule.
In the technical scheme, it by the way that transformer 202 is arranged, is executed with the DC voltage exported to rectification filtering module 10
Transformation operation, to realize the storage and transmission of energy.
Wherein, the first parallel resistance 204 may include three resistance in parallel, and the first series resistance 210 may include two
A concatenated resistance.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that correction module includes: Power Factor Correction Control
Chip 216, including first end, second end, third end, the 4th end, the 5th end and the 6th end, first end and first resistor 218 with
It is grounded, second end ground connection, is grounded after third end series connection third capacitor 222, the 4th end passes through the second electricity after the series connection of second capacitor 220
Resistance 224 is connected to the grid of metal-oxide-semiconductor 228 with 3rd resistor 226, and the 5th end is connected to the cathode of first diode 214, the 6th end
It is connected to the first output end of buffering submodule, the drain electrode of metal-oxide-semiconductor 228 is connected to the first output end of transformer 202, metal-oxide-semiconductor
One end of 228 source electrode and the second parallel resistance 230 ground connection, the other end ground connection of the second parallel resistance 230, the second parallel resistance
The 4th resistance 232 is additionally provided between 230 other end and third end.
In the technical scheme, by the way that Power Factor Correction Control chip 216 is arranged, to pass through Power Factor Correction Control
Chip 216 controls to adjust power factor, is used as switching tube by setting metal-oxide-semiconductor 228, by the output voltage values of the 6th pin,
The conducting of metal-oxide-semiconductor 228 and cut-off are controlled, is charged with being realized in cut-off to the first electrolytic capacitor 40, by the way that the 4th resistance 232 is arranged
Detection flows through the current signal of third pin, to detect whether to occur over-current signal, and detect there is over-current signal when, lead to
The 6th pin control cut-off metal-oxide-semiconductor 228 is crossed, to realize overcurrent protection.
Wherein, the first pin (COMP) is that the second pin (GND) is ground pin, and third pin (CS/ZCP) is for pressing down
High-frequency noise processed, the 4th pin are NV pin, and the 5th pin (VCC) is used to provide the operating voltage of controller and control circuit,
6th pin is GD pin.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that power factor correction module further include: the 4th capacitor
234, one end of the 4th capacitor 234 is connected to the first end of control chip, the other end ground connection of the 4th capacitor 234；Two or two pole
Pipe 236, the anode of the second diode 236 are connected to grid, and the cathode of the second diode 236 is set to second resistance 224 and
Between three resistance 226；5th resistance 238, one end of the 5th resistance 238 are connected to the anode of the second diode 236, the 5th resistance
238 other end is connected to source electrode.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that buffering submodule includes: third diode 240,
The anode of third diode 240 is connected to the first output end of transformer 202, and the cathode of third diode 240 is determined as buffering
The second output terminal of submodule, and it is connected to linear constant current module 30；Second series resistance 242, the one of the second series resistance 242
End is connected to the cathode of third diode 240, and the other end of the second series resistance 242 is determined as buffering the first output of submodule
End；6th resistance 244, one end of the 6th resistance 244 are connected to the other end of the second series resistance 242, the 6th resistance 244 it is another
One end ground connection；5th capacitor 246 is connected in parallel with the 6th resistance 244.
In the technical scheme, when being used to buffer MOS official's shutdown by the buffer loop in buffering submodule, leakage inductance is released
The high voltage released, when detecting the over-current signal of metal-oxide-semiconductor 228, that is, to block the output signal of control chip, realize
Stream protection.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that linear constant current module 30 includes: third electrolytic capacitor
302；One end of third electrolytic capacitor 302 is connected to the cathode of third diode 240, another termination of third electrolytic capacitor 302
Ground；Two current constant control chips (304 and 306) in parallel, current constant control chip include OUT pin, GND pin and REXT pipe
Foot, REXT are grounded after connecting with divider resistance (308 and 310), GND pin ground connection；LED load 312, the one of LED load 312
End is connected to one end of third electrolytic capacitor 302, and the other end of LED load 312 is connected to OUT pin.
In the technical scheme, by the way that third electrolytic capacitor 302 is arranged, third electrolytic capacitor 302 is during the charging process
Charging current is at a steady state value, and two current constant control chips can be considered as two current constant control chips, two constant currents
The output control terminal of control chip is connected with LED load 312, to realize the control to shine to LED load 312, wherein in OUT
There are voltage differences between pin and GND pin flows through the electric current of chip not when pressure difference is not higher than the constant current threshold voltage of chip
Constant, electric current can increase as the pressure drop between OUT pin and GND pin increases, when between OUT pin and GND pin
After voltage difference is higher than the constant current threshold voltage of chip, constant current operation state is presented in chip, that is, the electric current for flowing through chip is kept substantially
It is constant, so that the ripple current in LED load 312 is further decreased, to improve the light efficiency and LED load 312 of LED load 312
Service life.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that rectification filtering module 10 includes: rectification submodule,
It include: the first common mode inductance 102, the first input end of the first common mode inductance 102 is connected to alternating voltage by fuse 104
Second input terminal of zero line, the first common mode inductance 102 is connected to the zero line side of alternating voltage；Second common mode inductance 106, second
The first input end of common mode inductance 106 is connected to the first output end of the first common mode inductance, and the second of the second common mode inductance 106 is defeated
Enter the second output terminal that end is connected to the first common mode inductance.
In the technical scheme, by the way that common mode inductance is arranged, to eliminate common mode interference, rectifier bridge stack 112 passes through fuse
104 are connected with alternating current firewire L, and since fuse 104 has certain resistance value, peak voltage can be absorbed, there is Anti-surging to make
With.
Wherein, when the electric current that cartridge fuse passes through is more than 1.25~1.5 times of rated current, the fuse of cartridge fuse will be quick
Fusing.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that rectification submodule further include: differential mode capacitor 108, and
Connection connection is as between the first input end and the second input terminal of the first common mode inductance 102；Variable resistance 110, with differential mode capacitor
108 are connected in parallel；It is first defeated to be connected to the second common mode inductance 106 for rectifier bridge stack 112, the first input end of rectifier bridge stack 112
Outlet, the second input terminal of rectifier bridge stack 112 are connected to the second output terminal of the second common mode inductance 106, rectifier bridge stack 112
First output end ground connection.
It in the technical scheme,, can to filter out the interference of the higher hamonic wave in power supply by the way that differential mode capacitor 108 is arranged
Power transformation resistance 110 is negative tempperature coefficient thermistor, for the moment current-limiting protection that is powered.
In addition, rectifier bridge stack 112 is full rectifier bridge stack 112, the shape of full-wave bridge rectifier circuit is pressed by 4 rectifier diodes
The rectifier bridge stack 112 that formula is connected and is packaged as a whole, and two input terminals and two output ends are respectively provided with, two input terminals are logical
Common mode inductance access alternating current is crossed, two output ends are respectively that direct current output anode and earthing pole, DC output end are connected to filtering
Submodule.
As shown in Fig. 2, in any of the above-described technical solution, it is preferable that rectification filtering module 10 includes: filtering submodule,
It include: filter inductance 114, one end of filter inductance 114 is connected to the second output terminal of rectifier bridge stack 112, the other end of inductance
It is determined as the output end of rectification filtering module 10；One end of first filter capacitor 116, the first filter capacitor 116 is connected to filtering
One end of inductance 114, the other end ground connection of the first filter capacitor 116；Second filter capacitor 118, the one of the second filter capacitor 118
End is connected to the other end of filter inductance 114, the other end ground connection of the second filter capacitor 118；7th resistance 120, with filtered electrical
Sense 114 is arranged in parallel.
In the technical scheme, by setting filter inductance 114 and filter capacitor, to reduce the wave in driving circuit
Line.
The technical solution of the utility model is had been described in detail above with reference to the accompanying drawings, the utility model provides a kind of LED drive
Dynamic circuit, is arranged the first electrolytic capacitor between setting power factor correction module and linear constant current module, on the one hand, by setting
The power factor that power factor correction module improves driving circuit is set, on the other hand, drive is limited by linear constant current module
The maximum current of LED load is flowed through in dynamic circuit, to prevent LED load from overcurrent occur, thus improve LED load show it is steady
It is qualitative, in another aspect, by the first electrolytic capacitor of setting, when driving voltage is in trough state, to LED load discharge, with
Maintain the continuous illumination of LED load.
According to the LED lamp of the embodiment of utility model, including LED driving circuit described in above-mentioned any embodiment.
In the present invention, term " first ", " second ", " third " are only used for the purpose of description, and should not be understood as
Indication or suggestion relative importance；Term " multiple " then refers to two or more, unless otherwise restricted clearly.Term " peace
Dress ", " connected ", " connection ", the terms such as " fixation " shall be understood in a broad sense, can also be with for example, " connection " may be a fixed connection
It is to be detachably connected, or be integrally connected；" connected " can be directly connected, can also be indirectly connected through an intermediary.It is right
For those skilled in the art, can understand as the case may be above-mentioned term in the present invention specifically contain
Justice.
In the description of the utility model, it is to be understood that term " on ", "lower", "left", "right", "front", "rear" etc. refer to
The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and
Simplify description, rather than the device or unit of indication or suggestion meaning there must be specific direction, with specific orientation construction
And operation, it is thus impossible to be construed as a limitation of the present invention.
In the description of this specification, the description of term " one embodiment ", " some embodiments ", " specific embodiment " etc.
Mean that particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least the one of the utility model
In a embodiment or example.In the present specification, schematic expression of the above terms are not necessarily referring to identical embodiment
Or example.Moreover, the particular features, structures, materials, or characteristics of description can be in any one or more embodiment or examples
In can be combined in any suitable manner.
The above is only the preferred embodiments of the utility model, are not intended to limit the utility model, for this field
Technical staff for, various modifications and changes may be made to the present invention.Within the spirit and principle of the utility model,
Any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (11)
1. a kind of LED drive circuit characterized by comprising
Rectification filtering module, the ac voltage rectifier for that will input are pulsating dc voltage；
Power factor correction module is connected to the rectification filtering module, and the power factor correction module is for improving
Driving power factor；
Linear constant current module is connected to the power factor correction module, for limiting the peak value of driving current；
First electrolytic capacitor, one end of first electrolytic capacitor are set to the power factor correction module and the linear perseverance
Between flow module, the other end of first electrolytic capacitor is grounded, and is used in peak voltage to LED load module for power supply.
2. LED drive circuit according to claim 1, which is characterized in that the power factor correction module includes:
The input terminal of transformation submodule, the transformation submodule is connected to the output end of the rectification filtering module, for institute
It states pulsating dc voltage and executes transformation operation；
Submodule is buffered, the first output end of the transformation submodule is connected to；
Correction module is respectively connected to the second output terminal of first output end of transformation submodule, the transformation submodule
With it is described buffering submodule the first output end, for executing PFC.
3. LED drive circuit according to claim 2, which is characterized in that the transformation submodule includes:
Transformer, the first input end of the transformer are connected to the output end of the rectification filtering module, the transformer
Second input end grounding, the first output end of the transformer is the first output end of the transformation submodule, to be connected to
Buffering submodule is stated, the second output terminal of the transformer is connected to one end of the first parallel resistance, first parallel resistance
The other end successively connect with first capacitor, zener diode after be grounded；
The first series resistance being connected in series and the second electrolytic capacitor, the input terminal of first series resistance is connected to described whole
Flow the output end of filter module, the output end ground connection of second electrolytic capacitor；
First diode, the anode of the first diode are set between the first capacitor and the zener diode, institute
The cathode for stating first diode is set between first series resistance and second electrolytic capacitor, using as the transformation
The second output terminal of submodule.
4. LED drive circuit according to claim 3, which is characterized in that the correction module includes:
Factor correcting control chip, including first end, second end, third end, the 4th end, the 5th end and the 6th end, described first
End is grounded after connecting with first resistor with the second capacitor, the second end ground connection, is grounded after the third end series connection third capacitor,
4th end is connected to the grid of metal-oxide-semiconductor by second resistance and 3rd resistor, and the 5th end is connected to the described 1st
The cathode of pole pipe, the first output end of the six end connecting to the buffering submodule, the drain electrode of the metal-oxide-semiconductor are connected to institute
State the first output end of transformer, one end ground connection of the source electrode of the metal-oxide-semiconductor and the second parallel resistance, second parallel resistance
The other end ground connection, be additionally provided with the 4th resistance between the other end of second parallel resistance and the third end.
5. LED drive circuit according to claim 4, which is characterized in that the power factor correction module further include:
4th capacitor, one end of the 4th capacitor be connected to it is described control chip first end, the 4th capacitor it is another
End ground connection；
Second diode, the anode of second diode are connected to the grid, and the cathode of second diode is set to
Between the second resistance and the 3rd resistor；
5th resistance, one end of the 5th resistance are connected to the anode of second diode, the 5th resistance it is another
End is connected to the source electrode.
6. LED drive circuit according to claim 5, which is characterized in that the buffering submodule includes:
Third diode, the anode of the third diode are connected to the first output end of the transformer, the three or two pole
The cathode of pipe is determined as the second output terminal of the buffering submodule, and is connected to the linear constant current module；
Second series resistance, one end of second series resistance are connected to the cathode of the third diode, second string
The other end of connection resistance is determined as the first output end of the buffering submodule；
6th resistance, one end of the 6th resistance are connected to the other end of second series resistance, the 6th resistance
Other end ground connection；
5th capacitor is connect with the 6th resistor coupled in parallel.
7. LED drive circuit according to claim 6, which is characterized in that the linear constant current module includes:
Third electrolytic capacitor；One end of the third electrolytic capacitor is connected to the cathode of the third diode, the third electricity
Solve the other end ground connection of capacitor；
Two current constant control chips in parallel, the current constant control chip include OUT pin, GND pin and REXT pin, described
REXT is grounded after connecting with divider resistance, the GND pin ground connection；
LED load, one end of the LED load are connected to one end of the third electrolytic capacitor, the other end of the LED load
It is connected to the OUT pin.
8. LED drive circuit according to any one of claim 1 to 7, which is characterized in that the rectification filtering module packet
It includes:
Rectify submodule, comprising:
The first input end of first common mode inductance, first common mode inductance is connected to the fire of the alternating voltage by fuse
Second input terminal of line end, first common mode inductance is connected to the zero line side of the alternating voltage；
Second common mode inductance, the first input end of second common mode inductance are connected to the first output of first common mode inductance
End, the second input terminal of second common mode inductance are connected to the second output terminal of first common mode inductance.
9. LED drive circuit according to claim 8, which is characterized in that the rectification submodule further include:
Differential mode capacitor is connected in parallel between first input end and the second input terminal as first common mode inductance；
Variable resistance is connected in parallel with the differential mode capacitor；
Rectifier bridge stack, the first input end of the rectifier bridge stack is connected to the first output end of second common mode inductance, described
Second input terminal of rectifier bridge stack is connected to the second output terminal of second common mode inductance, the first output of the rectifier bridge stack
End ground connection.
10. LED drive circuit according to claim 9, which is characterized in that the rectification filtering module includes:
Filter submodule, comprising:
Filter inductance, one end of the filter inductance are connected to the second output terminal of the rectifier bridge stack, the inductance it is another
End is determined as the output end of the rectification filtering module；
First filter capacitor, one end of first filter capacitor are connected to one end of the filter inductance, first filtering
The other end of capacitor is grounded；
Second filter capacitor, one end of second filter capacitor are connected to the other end of the filter inductance, second filter
The other end of wave capacitor is grounded；
7th resistance is arranged in parallel with the filter inductance.
11. a kind of LED lamp characterized by comprising
LED drive circuit as described in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820053293.3U CN208190964U (en) | 2018-01-12 | 2018-01-12 | LED drive circuit and LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820053293.3U CN208190964U (en) | 2018-01-12 | 2018-01-12 | LED drive circuit and LED lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208190964U true CN208190964U (en) | 2018-12-04 |
Family
ID=64442175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820053293.3U Withdrawn - After Issue CN208190964U (en) | 2018-01-12 | 2018-01-12 | LED drive circuit and LED lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208190964U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110753425A (en) * | 2019-09-30 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Circuit for extracting low voltage from inductor and supplying power to chip |
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
-
2018
- 2018-01-12 CN CN201820053293.3U patent/CN208190964U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108040400B (en) * | 2018-01-12 | 2023-07-18 | 美智光电科技股份有限公司 | LED driving circuit and LED lamp |
| CN110753425A (en) * | 2019-09-30 | 2020-02-04 | 浙江凯耀照明有限责任公司 | Circuit for extracting low voltage from inductor and supplying power to chip |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102215615A (en) | Driving circuit for LED (light emitting diode) lamp | |
| CN102752929A (en) | High-power factor LED (light-emitting diode) driving circuit supporting silicon controlled rectifier dimming | |
| CN105792421B (en) | A kind of no bridge type LED drive power | |
| CN101742784A (en) | LED lamp and drive circuit thereof | |
| CN107979899A (en) | A kind of linear general pump feeds constant-current circuit and has its LED light | |
| CN208190964U (en) | LED drive circuit and LED lamp | |
| CN201430719Y (en) | Electronic emergency inverter | |
| CN108040400A (en) | LED drive circuit and LED lamp | |
| CN107734778A (en) | LED drive power circuit and luminaire | |
| CN105764198A (en) | Driving power supply for compartment LED illumination of railway vehicle | |
| CN207427521U (en) | A kind of LED illumination replaces light source | |
| CN109714865A (en) | A kind of LED drive circuit and method of no stroboscopic High Power Factor | |
| CN215647487U (en) | LED lamp string driving circuit and lamp string using same | |
| CN205005320U (en) | Driving circuit of light -emitting diode (LED) fluorescent tube | |
| WO2021073550A1 (en) | High-voltage, high-power-factor non-flicker light strip | |
| CN211090042U (en) | L ED silicon controlled rectifier light-adjusting power supply | |
| CN1284422C (en) | Low-harmonic compact type energy-saving lamp electronic ballast | |
| CN203104850U (en) | Light emitting diode (LED) lamp drive power supply adopting pulse width modulation (PWM) dimming | |
| CN107071961A (en) | It is a kind of effectively to weaken the high-voltage LED light bar of stroboscopic phenomenon | |
| CN101541134A (en) | Drive circuit of low-voltage alternating-current fluorescent lamp | |
| CN201398262Y (en) | Drive circuit of low-voltage alternating current fluorescent lamp | |
| CN206596269U (en) | Dimmable LED drive control circuit | |
| CN201601859U (en) | Non-isolated LED driving circuit | |
| CN200950682Y (en) | Novel highly effective low cost constant-current driver for LED lighting lamp | |
| CN214014584U (en) | Valley-filling isolation flyback merging LED circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 335400 Guixi Industrial Park No. 1, Yingtan City, Jiangxi Province Co-patentee after: MIDEA GROUP Co.,Ltd. Patentee after: MEIZHI PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 335400 Guixi Industrial Park No. 1, Yingtan City, Jiangxi Province Co-patentee before: MIDEA GROUP Co.,Ltd. Patentee before: JIANGXI MIDEA GUIYA LIGHTING Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200612 Address after: 335400 No. 1 Industrial Park, Yingtan, Jiangxi, Guixi Patentee after: MEIZHI PHOTOELECTRIC TECHNOLOGY Co.,Ltd. Address before: 335400 No. 1 Industrial Park, Yingtan, Jiangxi, Guixi Co-patentee before: MIDEA GROUP Co.,Ltd. Patentee before: MEIZHI PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 335400 No. 1 Industrial Park, Yingtan, Jiangxi, Guixi Patentee after: Meizhi Optoelectronic Technology Co.,Ltd. Address before: 335400 No. 1 Industrial Park, Yingtan, Jiangxi, Guixi Patentee before: MEIZHI PHOTOELECTRIC TECHNOLOGY Co.,Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20181204 Effective date of abandoning: 20230718 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20181204 Effective date of abandoning: 20230718 |