CN205491303U - LED drive circuit and LED lamps and lanterns - Google Patents
LED drive circuit and LED lamps and lanterns Download PDFInfo
- Publication number
- CN205491303U CN205491303U CN201620056710.0U CN201620056710U CN205491303U CN 205491303 U CN205491303 U CN 205491303U CN 201620056710 U CN201620056710 U CN 201620056710U CN 205491303 U CN205491303 U CN 205491303U
- Authority
- CN
- China
- Prior art keywords
- resistance
- led
- voltage
- current
- unit
- 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.)
- Expired - Fee Related
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
Abstract
The utility model provides a LED drive circuit and LED lamps and lanterns, LED drive circuit includes: first input end and live wire link to each other, and the second input links to each other with the zero line, and the output links to each other with LED, handle the alternating current of input, and then the full wave rectification module of output full wave rectification signal, the voltage input end links to each other with the output of voltage detecting end with the full wave rectification module, according to the drive current's that full wave rectification signal output is corresponding logic control module, and connect between LED and logic control module, according to the switch module of drive current drive LED work. The problem of current LED lamps and lanterns can only choose for use the power supply of the great non - isolation of AC -DC of the bodily form to drive, the range of application of having limited to the LED lamps and lanterns is solved.
Description
Technical field
This utility model belongs to drive circuit field, particularly relates to a kind of LED drive circuit and LED lamp.
Background technology
Along with the lifting of people's environmental consciousness, increasing LED illumination product enjoys demand.But due to
The particularity of existing its structure of LED, realize LED illumination product civil nature time, need civilian city
Electricity is adjusted, and is suitable for the supply voltage of LED illumination product work with output.Such as, civilian civil power output
Voltage be 220V alternating voltage, the input voltage of general LED illumination product is straight much smaller than 220V
Stream voltage, now needing the power supply by AC-DC non-isolated is 220V to the voltage that civilian civil power exports
Alternating voltage is changed, it is achieved galvanic current pressure output.
But, owing to the bodily form of the power supply of existing AC-DC non-isolated is bigger so that select AC-DC
The power supply of non-isolated is bigger as the bodily form of the LED lamp that LED drives, it is impossible to realize LED lamp
Miniaturization, the range of application not only having limited to LED lamp also affects the aesthetic property of LED lamp.
Utility model content
The purpose of this utility model is to provide a kind of LED drive circuit and LED lamp, it is intended to solve existing
LED lamp in the power supply of AC-DC non-isolated that uses embody relatively big, that has limited to LED lamp should
By the problem of scope.
This utility model is achieved in that a kind of LED drive circuit, is connected with LED, and described LED drives
Galvanic electricity road includes:
First input end is connected with live wire, and the second input is connected with zero line, and outfan is connected with described LED,
The alternating current of input is processed, and then the full-wave rectification block of output full wave rectified signal；
Voltage input end is connected with the outfan of voltage detecting end with described full-wave rectification block, according to described entirely
The Logic control module driving electric current that the output of ripple rectified signal is corresponding；And
It is connected between described LED and described Logic control module, drives described LED according to described driving electric current
The switch module of work.
Further, described full-wave rectification block includes:
First voltage input end and the second voltage input end are connected with live wire and zero line respectively, in described input
The protected location of overvoltage protection is carried out when the voltage of alternating current is excessive；
Input is connected with the outfan of described protected location, outfan and described LED and described logic control
Module is connected, and the alternating current of input is carried out rectification process, and then the rectification unit of output full wave rectified signal.
Further, described Logic control module includes: control unit, filter unit, sampling unit and
Current feedback unit；
Described control unit includes voltage input end, voltage detecting end, multiple driving current output terminal and many
Individual fed-back current signals receiving terminal, described filter unit is connected to voltage input end and the institute of described control unit
State between the outfan of rectification unit, described full wave rectified signal is filtered and exports filtered all-wave
Rectified signal, described sampling unit is connected to the voltage detecting end of described control unit and described rectification unit
Between outfan, described full wave rectified signal carrying out voltage sample and exports sampled voltage, described electric current is anti-
Feedback unit is connected between the plurality of fed-back current signals receiving terminal and described switch module, to described driving
Electric current is acquired, the plurality of driving electricity to generate described fed-back current signals, in described control unit
Stream outfan is connected with described switch module, and described sampled voltage is carried out by described control unit with reference voltage
Relatively with constant output, and drive electric current defeated according to described filtered full wave rectified signal from corresponding
Go out to hold output driving current, select corresponding fed-back current signals receiving terminal to receive fed-back current signals, and root
According to the mode of operation that the switching of described fed-back current signals is different.
Further, described protected location includes:
Electric fuse F1, varistor R101, the first electric capacity C1 and the second electric capacity C2；
Described electric fuse F1 the first end is connected with described live wire, and described electric fuse F1 second terminates described pressure-sensitive
Resistance R101 the first end, described varistor R101 the second end is connected with described zero line, described first electric capacity
First end of C1 and first end of described second electric capacity C2 connect described varistor R101 the first end altogether, described
Second end of the first electric capacity C1 and second end of described second electric capacity C2 meet described varistor R101 second altogether
End, the first end and second end of described second electric capacity C2 are connected with described rectification unit respectively.
Further, described rectification unit includes:
Full wave rectifier BD1；
Described full wave rectifier BD1 first input end is connected with first end of described second electric capacity C2, described entirely
Ripple commutator BD1 the second input is connected with second end of described second electric capacity C2, described full wave rectifier
The negative output terminal ground connection of BD1, the positive output of described full wave rectifier BD1 terminates described LED and described logic
Control module.
Further, described control unit includes:
Single-chip microcomputer U1, resistance R401, resistance R402 and electric capacity C5；
The voltage input end that feeder ear is described control unit of described single-chip microcomputer U1, with described filter unit phase
Even, the voltage detecting end that test side is described control unit of described single-chip microcomputer U1, with described sampling unit phase
Even, the controlled signal end of described single-chip microcomputer U1 and reference voltage output terminal respectively with described resistance R401 first
End is connected with described resistance R402 the first end, the reference voltage input terminal of described single-chip microcomputer U1, described resistance
R401 the second end and described resistance R402 the second end meet described electric capacity C5 the first end, described electric capacity C5 altogether
Second end ground connection, multiple current output terminals of institute single-chip microcomputer U1 are connected with described switch module, described single-chip microcomputer
Multiple feedback ends of U1 are corresponding with multiple fed-back current signals outfans of described current feedback unit to be connected.
Further, described filter unit includes:
Resistance R201 and filter capacitor C4；
Described resistance R201 the first end is connected with the outfan of described rectification unit, described resistance R201 second
End connects described filter capacitor C4 the first end and the voltage input end of described control unit, described filter capacitor altogether
C4 the second end ground connection；
Described sampling unit includes: resistance R301 and resistance R302；
Described resistance R301 the first end is connected with the outfan of described rectification unit, described resistance R301 second
End connects the voltage detecting end of described resistance R302 the first end and described control unit altogether, described resistance R302 the
Two end ground connection.
Further, described current feedback unit includes at least one resistance, the first end of described resistance and institute
The fed-back current signals outfan stating single-chip microcomputer U1 is connected, the second end ground connection of described resistance.
Further, described switch module includes at least one switching tube, the control end of described switching tube and institute
The current output terminal stating single-chip microcomputer U1 is connected, and the hot end of described switching tube is connected with described LED,
The cold end of described switching tube is connected with a fed-back current signals outfan of described single-chip microcomputer U1.
Corresponding, another object of the present utility model is to provide a kind of LED lamp, described LED lamp
Also include LED drive circuit as above.
The purpose of this utility model is a kind of LED drive circuit and the LED lamp provided, and LED drives electricity
Road includes: first input end is connected with live wire, and the second input is connected with zero line, and outfan is connected with LED,
The alternating current of input is processed, and then the full-wave rectification block of output full wave rectified signal；Voltage inputs
End is connected with the outfan of full-wave rectification block with voltage detecting end, according to full wave rectified signal output correspondence
Drive the Logic control module of electric current；And be connected between LED and Logic control module, according to driving electricity
Stream drives the switch module of LED operation.Solve existing LED lamp and can only select the AC-DC that the bodily form is bigger
The power supply of non-isolated is driven, the problem having limited to the range of application of LED lamp.
Accompanying drawing explanation
The structural representation of the LED drive circuit that Fig. 1 provides for this utility model embodiment；
The concrete structure schematic diagram of the LED drive circuit that Fig. 2 provides for this utility model embodiment；
The physical circuit principle schematic of the LED drive circuit that Fig. 3 provides for this utility model embodiment.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing
And embodiment, this utility model is further elaborated.Should be appreciated that described herein specifically
Embodiment, only in order to explain this utility model, is not used to limit this utility model.
The purpose of this utility model is to provide a kind of LED drive circuit and LED lamp, it is intended to solve existing
LED lamp in the power supply of AC-DC non-isolated that uses embody relatively big, that has limited to LED lamp should
By the problem of scope.
Fig. 1 shows the structural representation of the LED drive circuit that this utility model embodiment 1 provides.Such as figure
Shown in 1, the purpose of this utility model embodiment is to provide a kind of LED drive circuit 100, with LED200
Being connected, LED drive circuit 100 includes:
First input end is connected with live wire AC_L, and the second input is connected with zero line AC_N, outfan with
LED200 is connected, and processes the alternating current of input, and then all wave rectification mould of output full wave rectified signal
Block 10；
Voltage input end is connected with the second outfan of full-wave rectification block 10 respectively with voltage detecting end, according to
The Logic control module 20 driving electric current that full wave rectified signal output is corresponding；And
It is connected between LED200 and Logic control module 20, drives LED200 work according to driving electric current
Switch module 30.
In the present embodiment, full-wave rectification block 10 is connected with the electric main of 220V, produces all wave rectification
Signal, directly powers with Logic control module 20 to LED200 simultaneously.Logic control module 20 is according to all-wave
The driving electric current that rectified signal output is corresponding, controls switch module 30 and opens, and then realizes controlling LED200
Current stabilization in constant current state.It addition, Logic control module 20 can detect input voltage and flow through LED200
Electric current, determine the running of internal state machine accordingly.Selection to the forward voltage of LED200 does not limit,
But total voltage needs less than and close to the peak value of mains voltage of input, comes for 220V voltage
Saying, general total series voltage controls to be advisable at 260V-270V.
Fig. 2 shows the concrete structure schematic diagram of the LED drive circuit that this utility model embodiment provides.As
Shown in Fig. 2, full-wave rectification block 10 includes:
First voltage input end and the second voltage input end are connected with live wire AC_L and zero line AC_N respectively,
The voltage of the alternating current of input carries out the protected location 11 of overvoltage protection time excessive；
Input is connected with the outfan of protected location 11, outfan and LED200 and Logic control module 20
It is connected, the alternating current of input is carried out rectification process, and then the rectification unit 12 of output full wave rectified signal.
In the present embodiment, protection power supply 11 is located between mains voltage and rectification unit 12, protection
First voltage input end of unit 11 and the second voltage input end respectively with live wire AC_L and zero line AC_N phase
Even.Mains voltage inputs to rectification unit 12, by rectification unit 12 to city by protection power supply 11
Electricity alternating voltage exports full wave rectified signal after carrying out rectification.Wherein, rectification unit 12 can be existing entirely
Ripple commutator.
As in figure 2 it is shown, Logic control module 20 includes:
Control unit 21, filter unit 22, sampling unit 23 and current feedback unit 24；
Control unit 21 includes voltage input end, voltage detecting end, multiple driving current output terminal and multiple
Fed-back current signals receiving terminal, filter unit 22 is connected to voltage input end and the rectification list of control unit 21
Between the outfan of unit, full wave rectified signal it is filtered and exports filtered full wave rectified signal, adopting
Sample unit 23 is connected between the voltage detecting end of control unit 22 and the outfan of rectification unit 12, to entirely
Ripple rectified signal carries out voltage sample and exports sampled voltage, and current feedback unit 24 is connected to multiple feedback electricity
Between stream signal receiving end and switch module 30, to driving electric current to be acquired, to generate fed-back current signals,
Multiple driving current output terminals in control unit 21 are connected with switch module 30, and control unit 22 will sampling
Voltage compares with reference voltage, with constant output, and according to filtered full wave rectified signal from
Corresponding driving current output terminal output driving current, selects corresponding fed-back current signals receiving terminal to receive anti-
Supply current signal, and switch different mode of operations according to fed-back current signals.
In the present embodiment, filter unit 21 full wave rectified signal is filtered and exports to control unit 24
Filtered full wave rectified signal.Sampling unit 22 carries out voltage sample and to controlling list to full wave rectified signal
Unit 24 output sampled voltage.Wherein, the input of filter unit 21 is connected with the outfan of rectification unit 12,
The outfan of filter unit 21 is connected with control unit 24, and control unit 24 is defeated to monitoring filter unit 21
Going out the voltage of end, when the voltage of filter unit 21 outfan is higher than 12V, control unit 24 enables and starts
Work.When the voltage of filter unit 21 outfan is less than 8V, control unit 24 can be closed, low to avoid
The instability of logic is controlled during voltage status.The input of sampling unit 22 and the outfan of rectification unit 12
Being connected, the outfan of sampling unit 22 is connected with control unit 24.Control unit 24 is single by detection sampling
Sampled voltage on the outfan of unit 22, compares with fixing reference voltage, and then output becomes with input voltage
Change and the pwm signal of dutycycle change, reference voltage is modulated, produce and input voltage negative correlation
Control signal.When input voltage raises, compensate the trend that luminous flux becomes big, thus reach the logical control of constant light
System.
Fig. 3 shows the physical circuit principle schematic of the LED drive circuit that this utility model embodiment provides.
As it is shown on figure 3, protected location 11 includes: electric fuse F1, varistor R101, the first electric capacity C1
And the second electric capacity C2.
Electric fuse F1 the first end is connected with live wire AC_L, and electric fuse F1 second terminates varistor R101
One end, varistor R101 the second end is connected with zero line AC_N, first end of the first electric capacity C1 and the second electricity
The first end holding C2 connects varistor R101 the first end, second end of the first electric capacity C1 and the second electric capacity altogether
Second end of C2 connects varistor R101 the second end altogether, first end of the second electric capacity C2 and the second end respectively with
Rectification unit is connected.
As it is shown on figure 3, rectification unit 12 includes: full wave rectifier BD1.
First end of full wave rectifier BD1 first input end and the second electric capacity C2 is connected, full wave rectifier BD1
Second end of the second input and the second electric capacity C2 is connected, the negative output terminal ground connection of full wave rectifier BD1, entirely
The positive output termination LED of ripple commutator BD1 and Logic control module 20.
As it is shown on figure 3, control unit 21 includes: single-chip microcomputer U1, resistance R401, resistance R402 and electric capacity
C5。
The voltage input end that feeder ear VCC is control unit of single-chip microcomputer U1, is connected with filter unit 22,
The voltage detecting end that test side Vsense is control unit of single-chip microcomputer U1, is connected with sampling unit 23, single
The controlled signal end PWM of sheet machine U1 and reference voltage output terminal VREFO respectively with resistance R401 the first end and
Resistance R402 the first end is connected, and states the reference voltage input terminal VREFI of single-chip microcomputer U1, resistance R401 second
End and resistance R402 the second end meet electric capacity C5 the first end, electric capacity C5 the second end ground connection, single-chip microcomputer U1 altogether
Multiple current output terminals be connected with switch module 30, multiple feedback ends of single-chip microcomputer U1 and current feedback list
Multiple fed-back current signals outfan correspondences of unit 24 are connected.
As it is shown on figure 3, filter unit 22 includes: resistance R201 and filter capacitor C4.
Resistance R201 the first end is connected with the outfan of rectification unit, and resistance R201 the second end connects filtered electrical altogether
Hold C4 the first end and the voltage input end of control unit, filter capacitor C4 the second end ground connection.
As it is shown on figure 3, sampling unit 23 includes: resistance R301 and resistance R302.
Resistance R301 the first end is connected with the outfan of rectification unit, resistance R301 the second end connecting resistance altogether
R302 the first end and the voltage detecting end of control unit, resistance R302 the second end ground connection.
In the present embodiment, multiple current output terminals of single-chip microcomputer U1 are multiple driving electricity of control unit 21
Stream outfan, multiple feedback ends of single-chip microcomputer U1 are multiple fed-back current signals receiving terminals of control unit 21.
Current feedback unit 24 includes at least one resistance, and the first end of resistance is electric with a feedback of single-chip microcomputer U1
Stream signal output part is connected, the second end ground connection of resistance.Switch module 30 includes at least one switching tube, opens
The end that controls closing pipe is connected with a current output terminal of single-chip microcomputer U1, the hot end of switching tube and LED200
Being connected, the cold end of switching tube is connected with a fed-back current signals outfan of single-chip microcomputer U1.
As described in Figure 3, it is as a example by 4 LED string L1, L2, L3, L4 by LED200, corresponding,
Single-chip microcomputer U1 includes four current output terminals G1, G2, G3, G4 and four feedback ends S1, S2, S3, S4.
Current feedback unit includes four fed-back current signals outputs.Four current output terminal G1 of single-chip microcomputer U1,
G2, G3, G4 are connected with switch module 30, four feedback ends S1, S2, S3, S4 of single-chip microcomputer U1 with
Four fed-back current signals outfan correspondences of current feedback unit are connected.Corresponding, current feedback unit
24 can include four resistance, are respectively as follows: resistance R501, resistance R502, resistance R503 and resistance R504.
Resistance R501 the first end, resistance R502 the first end, resistance R503 the first end and resistance R504 the first end
It is connected with multiple feedback end S1, S2, S3, S4 of described single-chip microcomputer U1 respectively, described resistance R501 second
End is connected with described resistance R502 the first end, described resistance R502 the second end and described resistance R503 the first end
Being connected, described resistance R503 the second end is connected with described resistance R504 the first end, described resistance R504 second
End ground connection.Corresponding switch module 30 includes four switching tubes, be respectively as follows: the first switching tube Q1,
Two switching tube Q2, the 3rd switching tube Q3 and the 4th switching tube Q4.The hot end of each switching tube is respectively
Corresponding connection one LED string.Concrete, the first switching tube Q1 controls end, the control of second switch pipe Q2
End processed, the 3rd switching tube Q3 the control end controlling end and the 4th switching tube Q4 respectively with single-chip microcomputer U1
Four current output terminals G1, G2, G3, G4 be connected.The cold end of the first switching tube Q1, second open
Close the cold end of pipe Q2, the cold end of the 3rd switching tube Q3 and the cold end of the 4th switching tube Q4
Meet a feedback end S1 of described single-chip microcomputer U1 altogether.
In the present embodiment, when the full wave rectified signal after rectification begins to ramp up from 0V, arrive LED string
During the startup magnitude of voltage of L1, single-chip microcomputer U1 controls the control of the first switching tube Q1 by current output terminal G1
Terminal voltage, and then control the current stabilization of LED string L1 in the first constant current operation state.It is corresponding,
The electric current I1=Vref/ (R501+R502+R503+R504) of the first constant current operation state.Wherein, Vref is this
Time rectification after the magnitude of voltage of full wave rectified signal, R501, R502, R503 and R504 be respectively resistance R501,
Resistance R502, resistance R503 and the resistance of resistance R504.
Startup magnitude of voltage and the LED of LED string L1 is reached when the full wave rectified signal after rectification continues rising
Lamp string L2 start magnitude of voltage and time, single-chip microcomputer U1 closes the first switching tube by current output terminal G1
Q1, is opened and controls second switch pipe Q2, and then control to flow through LED string L1 by current output terminal G2
With the current stabilization of LED string L2 in the second constant current operation state.Corresponding, the second constant current operation shape
The electric current I2=Vref/ (R502+R503+R504) of state.Wherein, all wave rectification after Vref is now rectification
The magnitude of voltage of signal, R502, R503 and R504 are respectively resistance R502, resistance R503 and resistance R504
Resistance.
Correspondingly, rising with the voltage of the full wave rectified signal after rectification, single-chip microcomputer U1 is exported by electric current
End G2 closes second switch pipe Q2, is opened and control the 3rd switching tube Q3 by current output terminal G3, and then
Control to flow through the current stabilization of LED string L1, LED string L2 and LED string L3 at the 3rd constant current operation
State.Corresponding, the electric current I3=Vref/ (R503+R504) of the 3rd constant current operation state.Wherein,
Vref is the magnitude of voltage of the full wave rectified signal after now rectification, R503 and R504 is respectively resistance R503
Resistance with resistance R504.
When the full wave rectified signal after rectification voltage continue rise, reach LED string L1, LED string L2,
During the startup magnitude of voltage sum of LED string L3 and LED string L4, single-chip microcomputer U1 passes through current output terminal
G3 closes the 3rd switching tube Q3, is opened and control the 4th switching tube Q4, and then control by current output terminal G4
System flows through the current stabilization of LED string L1, LED string L2, LED string L3 and LED string L4 and exists
4th constant current operation state.Corresponding, the electric current I4=Vref/R504 of the 4th constant current operation state.
Wherein, Vref is the magnitude of voltage of the full wave rectified signal after now rectification, and R504 is the resistance of resistance R504.
Corresponding, another object of the present utility model is to provide a kind of LED lamp, this LED lamp bag
Include LED drive circuit 100 as above.The LED lamp provided due to the present embodiment and this utility model
Relevant specific implementation and operation principle have elaborated, therefore, the most not
Repeat again.
The purpose of this utility model is a kind of LED drive circuit and the LED lamp provided, and LED drives electricity
Road includes: first input end is connected with live wire, and the second input is connected with zero line, and outfan is connected with LED,
The alternating current of input is processed, and then the full-wave rectification block of output full wave rectified signal；Voltage inputs
End is connected with the outfan of full-wave rectification block with voltage detecting end, according to full wave rectified signal output correspondence
Drive the Logic control module of electric current；And be connected between LED and Logic control module, according to driving electricity
Stream drives the switch module of LED operation.Solve existing LED lamp and can only select the AC-DC that the bodily form is bigger
The power supply of non-isolated is driven, the problem having limited to the range of application of LED lamp.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model,
All any amendment, equivalent and improvement etc. made within spirit of the present utility model and principle, all should
Within being included in protection domain of the present utility model.
Claims (10)
1. a LED drive circuit, is connected with LED, it is characterised in that described LED drive circuit includes:
First input end is connected with live wire, and the second input is connected with zero line, and outfan is connected with described LED,
The alternating current of input is processed, and then the full-wave rectification block of output full wave rectified signal；
Voltage input end with voltage detecting end respectively outfan with described full-wave rectification block be connected, according to institute
State the Logic control module driving electric current that full wave rectified signal output is corresponding；And
It is connected between described LED and described Logic control module, drives described LED according to described driving electric current
The switch module of work.
2. LED drive circuit as claimed in claim 1, it is characterised in that described full-wave rectification block bag
Include:
First voltage input end and the second voltage input end are connected with live wire and zero line respectively, in described input
The protected location of overvoltage protection is carried out when the voltage of alternating current is excessive；
Input is connected with the outfan of described protected location, outfan respectively with described LED and described logic
Control module is connected, and the alternating current of input is carried out rectification process, and then the rectification of output full wave rectified signal
Unit.
3. LED drive circuit as claimed in claim 2, it is characterised in that described Logic control module bag
Include: control unit, filter unit, sampling unit and current feedback unit；
Described control unit includes voltage input end, voltage detecting end, multiple driving current output terminal and many
Individual fed-back current signals receiving terminal；Described filter unit is connected to voltage input end and the institute of described control unit
State between the outfan of rectification unit, described full wave rectified signal is filtered and exports filtered all-wave
Rectified signal；Described sampling unit is connected to the voltage detecting end of described control unit and described rectification unit
Between outfan, described full wave rectified signal is carried out voltage sample and exports sampled voltage；Described electric current is anti-
Feedback unit is connected between the plurality of fed-back current signals receiving terminal and described switch module, to described driving
Electric current is acquired, to generate described fed-back current signals；The plurality of driving electricity in described control unit
Stream outfan is connected with described switch module, and described sampled voltage is carried out by described control unit with reference voltage
Relatively, with constant output, and drive electric current from accordingly according to described filtered full wave rectified signal
Outfan output driving current, selects corresponding fed-back current signals receiving terminal to receive fed-back current signals, and
According to the mode of operation that the switching of described fed-back current signals is different.
4. LED drive circuit as claimed in claim 3, it is characterised in that described protected location includes:
Electric fuse F1, varistor R101, the first electric capacity C1 and the second electric capacity C2；
Described electric fuse F1 the first end is connected with described live wire, and described electric fuse F1 second terminates described pressure-sensitive
Resistance R101 the first end, described varistor R101 the second end is connected with described zero line, described first electric capacity
First end of C1 and first end of described second electric capacity C2 connect described varistor R101 the first end altogether, described
Second end of the first electric capacity C1 and second end of described second electric capacity C2 meet described varistor R101 second altogether
End, the first end and second end of described second electric capacity C2 are connected with described rectification unit respectively.
5. LED drive circuit as claimed in claim 4, it is characterised in that described rectification unit includes:
Full wave rectifier BD1；
Described full wave rectifier BD1 first input end is connected with first end of described second electric capacity C2, described entirely
Ripple commutator BD1 the second input is connected with second end of described second electric capacity C2, described full wave rectifier
The negative output terminal ground connection of BD1, the positive output of described full wave rectifier BD1 terminates described LED and described logic
Control module.
6. LED drive circuit as claimed in claim 3, it is characterised in that described control unit includes:
Single-chip microcomputer U1, resistance R401, resistance R402 and electric capacity C5；
The voltage input end that feeder ear is described control unit of described single-chip microcomputer U1, with described filter unit phase
Even, the voltage detecting end that test side is described control unit of described single-chip microcomputer U1, with described sampling unit phase
Even, the controlled signal end of described single-chip microcomputer U1 and reference voltage output terminal respectively with described resistance R401 first
End is connected with described resistance R402 the first end, the reference voltage input terminal of described single-chip microcomputer U1, described resistance
R401 the second end and described resistance R402 the second end meet described electric capacity C5 the first end, described electric capacity C5 altogether
Second end ground connection, multiple current output terminals of institute single-chip microcomputer U1 are connected with described switch module, described single-chip microcomputer
Multiple feedback ends of U1 are corresponding with multiple fed-back current signals outfans of described current feedback unit to be connected.
7. LED drive circuit as claimed in claim 3, it is characterised in that described filter unit includes:
Resistance R201 and filter capacitor C4；
Described resistance R201 the first end is connected with the outfan of described rectification unit, described resistance R201 second
End connects described filter capacitor C4 the first end and the voltage input end of described control unit, described filter capacitor altogether
C4 the second end ground connection；
Described sampling unit includes: resistance R301 and resistance R302；
Described resistance R301 the first end is connected with the outfan of described rectification unit, described resistance R301 second
End connects the voltage detecting end of described resistance R302 the first end and described control unit altogether, described resistance R302 the
Two end ground connection.
8. LED drive circuit as claimed in claim 6, it is characterised in that described current feedback unit bag
Including at least one resistance, the first end of described resistance exports with a fed-back current signals of described single-chip microcomputer U1
End is connected, the second end ground connection of described resistance.
9. LED drive circuit as claimed in claim 6, it is characterised in that described switch module include to
A few switching tube, the end that controls of described switching tube is connected with a current output terminal of described single-chip microcomputer U1,
The hot end of described switching tube is connected with described LED, the cold end of described switching tube and described single-chip microcomputer
One fed-back current signals outfan of U1 is connected.
10. a LED lamp, it is characterised in that described LED lamp also includes that claim 1-9 such as is appointed
One described LED drive circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620056710.0U CN205491303U (en) | 2016-01-20 | 2016-01-20 | LED drive circuit and LED lamps and lanterns |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620056710.0U CN205491303U (en) | 2016-01-20 | 2016-01-20 | LED drive circuit and LED lamps and lanterns |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205491303U true CN205491303U (en) | 2016-08-17 |
Family
ID=56638089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620056710.0U Expired - Fee Related CN205491303U (en) | 2016-01-20 | 2016-01-20 | LED drive circuit and LED lamps and lanterns |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205491303U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094332A (en) * | 2017-05-19 | 2017-08-25 | 深圳市豪恩光电照明股份有限公司 | A kind of LED lamp, LED lamp tube and its constant-current drive circuit |
| CN110545606A (en) * | 2019-09-30 | 2019-12-06 | 中山市蓝德电子有限公司 | power supply method and power supply circuit adopting same |
| CN113709943A (en) * | 2021-09-01 | 2021-11-26 | 欧普照明股份有限公司 | Lamp power supply and lighting system based on double-bus control |
-
2016
- 2016-01-20 CN CN201620056710.0U patent/CN205491303U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107094332A (en) * | 2017-05-19 | 2017-08-25 | 深圳市豪恩光电照明股份有限公司 | A kind of LED lamp, LED lamp tube and its constant-current drive circuit |
| CN107094332B (en) * | 2017-05-19 | 2019-01-15 | 深圳市豪恩智能物联股份有限公司 | A kind of LED lamp, LED lamp tube and its constant-current drive circuit |
| CN110545606A (en) * | 2019-09-30 | 2019-12-06 | 中山市蓝德电子有限公司 | power supply method and power supply circuit adopting same |
| CN113709943A (en) * | 2021-09-01 | 2021-11-26 | 欧普照明股份有限公司 | Lamp power supply and lighting system based on double-bus control |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102752940B (en) | High-efficiency LED (light-emitting diode) drive circuit and drive method thereof | |
| CN104703363B (en) | A kind of intelligent universal light modulator | |
| CN103442501B (en) | Forced constant flow source dimming LED (Light Emitting Diode) lamp | |
| CN104427688B (en) | LED alternating-current drive circuit | |
| CN106253330A (en) | A kind of photovoltaic power optimizes system | |
| CN106132003A (en) | Dual-channel LED driver and control method thereof | |
| CN109196952A (en) | Load control device for LED source | |
| CN102573213A (en) | LED (Light Emitting Diode) dimming system | |
| CN107682961A (en) | A kind of LED fishing lamps power supply output switching circuit | |
| CN205491303U (en) | LED drive circuit and LED lamps and lanterns | |
| CN205005298U (en) | LED lamps and lanterns of switch mixing of colors and control circuit thereof | |
| CN105101571A (en) | Intelligent switch dimming control circuit | |
| CN104661408B (en) | LED light adjusting circuits and LED lamp | |
| EP3580842A1 (en) | Power supply apparatus and power supply method | |
| CN104411072A (en) | Led dimming system | |
| CN108650750B (en) | LED linear full-voltage driving circuit | |
| CN207531122U (en) | A kind of LED fishing lamps power supply output switching circuit | |
| CN205017630U (en) | LED drive power supply adjusts luminance and turn -offs control circuit | |
| CN205792257U (en) | Backlight drive circuit and television set | |
| CN210579355U (en) | Single live wire control circuit of diode | |
| CN206164934U (en) | Linear constant -current drive circuit of LED and LED lighting device | |
| CN205546103U (en) | Flyback drive circuit | |
| CN205005320U (en) | Driving circuit of light -emitting diode (LED) fluorescent tube | |
| CN104754803A (en) | Efficient LED fluorescent lamp power supply | |
| CN104302060B (en) | A kind of LED drive power control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20210120 |