CN209234083U - A kind of LED linear driving circuit - Google Patents
A kind of LED linear driving circuit Download PDFInfo
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- CN209234083U CN209234083U CN201821014712.9U CN201821014712U CN209234083U CN 209234083 U CN209234083 U CN 209234083U CN 201821014712 U CN201821014712 U CN 201821014712U CN 209234083 U CN209234083 U CN 209234083U
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Abstract
The utility model relates to a kind of LED linear driving circuits, and for driving the n being sequentially connected in series section LED load, the anode connection DC voltage electrode of the first segment LED load, the cathode of (n-1)th section of LED load connects the anode of n-th section of LED load；n≥2；It is characterized in that, the LED linear driving circuit includes: input voltage sample circuit, error amplifying circuit, adder circuit, current detection circuit and load switching circuit.The LED linear driving circuit can make input current waveform follow input voltage that sine wave is presented substantially；Metal-oxide-semiconductor in the LED linear driving circuit uses discrete device, and is listed in placement location on PCB is flexible, has had heat dissipation performance and reliability；In addition, can arbitrarily use the LED load of 1~multistage according to system effectiveness requirement, and the number of segment of used LED load is more, efficiency is higher.
Description
Technical field
The utility model relates to driving circuit field more particularly to a kind of LED linear driving circuits.
Background technique
In existing LED linear driving circuit scheme, the input current of LED linear driving circuit is largely by 3~5
Section square wave current be formed by stacking, caused by the result is that circuit power factor is relatively low, harmonic wave is difficult through existing standard；It is existing
LED linear driving circuit scheme is mostly to be integrated with power MOS pipe, and LED load number of segment is fixed, and is caused using chip package
Power MOS pipe heat dissipation is difficult, or needs multi-chip used in parallel, since the fixed meeting of LED load number of segment is so that design is not clever enough
It is living, it is inefficient.
Utility model content
Technical problem to be solved in the utility model is that a kind of LED linear driving electricity is provided for the above-mentioned prior art
Road.
Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of LED linear driving circuit, is used for
The n section LED load that driving is sequentially connected in series, the anode connection DC voltage electrode of the first segment LED load, described (n-1)th section
The cathode of LED load connects the anode of n-th section of LED load；n≥2；It is characterized in that, the LED linear driving circuit packet
It includes: input voltage sample circuit, error amplifying circuit, adder circuit, current detection circuit and load switching circuit；Wherein:
The first input end of the input voltage sample circuit is connected with the anode of first segment LED load or cathode, institute
The first output end for stating input voltage sample circuit is connected with the first input end of the error amplifying circuit, the input voltage
The second output terminal of sample circuit is grounded；
Second input terminal of the error amplifying circuit is connected with the first output end of the adder circuit, the error
First output end of amplifying circuit is connected with the first input end of the load switching circuit；
The first input end of the adder circuit is connected with the first output end of the current detection circuit, the addition
Second input terminal of device circuit is connected with n-th section of LED load cathode；
The first input end of the current detection circuit is connected with the first output end of the load switching circuit, the electricity
The second output terminal of current detection circuit is grounded；
N-th input terminal of the load switching circuit is connected with the cathode of (n-1)th section of LED load.
With improvement, in the LED linear driving circuit, the input voltage sample circuit includes: the 4th resistance and
Five resistance；The first end of 4th resistance connects the first input end of the input voltage sample circuit, the 4th resistance
Second end connect the first output end of the input voltage sample circuit；The first end of 5th resistance connects the input
First output end of voltage sampling circuit, the second end ground connection of the 5th resistance.
With improvement, in the LED linear driving circuit, the error amplifying circuit includes: the first triode and second
Triode；First triode is PNP type triode, the current collection of the base stage of first triode and second triode
Extremely it is connected, the emitter of first triode is connected with the first output end of the error amplifying circuit, the one or three pole
The grounded collector of pipe；
Second triode is NPN type triode, base stage and the error amplifying circuit of second triode
Second input terminal is connected, and the emitter of second triode is connected with the first input end of error amplifying circuit.
With improvement, in the LED linear driving circuit, the adder circuit includes: the 6th resistance and the 7th resistance；
The first end of 6th resistance is connected with the first input end of the adder circuit, the second end of the 6th resistance and institute
The first output end for stating adder circuit is connected；
The first end of 7th resistance is connected with the second input terminal of the adder circuit, and the of the 7th resistance
Two ends are connected with the first output end of the adder circuit.
With improvement, in the LED linear driving circuit, the current detection circuit includes: the 4th diode, the 8th electricity
Resistance and the 9th resistance；4th diode and the 9th resistor coupled in parallel, anode and the current detecting of the 4th diode
The first input end of circuit is connected, and the cathode of the 4th diode is connected with the first end of the 8th resistance, and the described 8th
The second end of resistance is grounded.
It improves again, in the LED linear driving circuit, the load switching circuit includes: the first switching circuit and
Two switching circuits；Wherein:
The first input end of first switching circuit is connected with the third input terminal of the load switching circuit, and described the
Second input terminal of one switching circuit is connected with the first input end of the load switching circuit, first switching circuit
Third input terminal is connected with the second input terminal of the load switching circuit, the first output end of first switching circuit and institute
The first output end for stating load switching circuit is connected；
The first input end of second switching circuit is connected with the 4th input terminal of the load switching circuit, and described the
Second input terminal of two switching circuits is connected with the first input end of the load switching circuit, and the of second switching circuit
Three input terminals with it is described load switching circuit third input terminal be connected, the first output end of second switching circuit with it is described
The first output end for loading switching circuit is connected.
Further, in the LED linear driving circuit, the xth switching circuit includes: xth resistance Rx, xth two
Pole pipe Dx, xth metal-oxide-semiconductor Mx and xth controllable switch Sx；x≥1；Wherein；
The first end of the xth resistance Rx is connected with the grid of the xth metal-oxide-semiconductor Mx, and the second of the xth resistance Rx
End is connected with the drain electrode of the xth metal-oxide-semiconductor Mx；
The positive Dx of the xth diode is connected with the grid of the xth metal-oxide-semiconductor Mx, the cathode of the xth diode Dx
It is connected with the second input terminal of the xth switching circuit；
The grid of the xth metal-oxide-semiconductor Mx is connected with one end of the xth controllable switch Sx, the leakage of the xth metal-oxide-semiconductor Mx
Pole is connected with the third input terminal of the xth switching circuit, source electrode and the xth switching circuit of the xth metal-oxide-semiconductor Mx
First output end is connected；
The other end of the xth controllable switch Sx is connected with the first output end of the xth switching circuit, and the xth can
The anode for controlling the switch control terminal of switch Sx is connected with the first input end of the xth switching circuit, the xth controllable switch Sx
The cathode of switch control terminal be connected with the first output end of the xth switching circuit.
Compared with the prior art, the advantages of the utility model are:
Firstly, LED linear driving circuit provided by the utility model can make input current waveform follow input electricity substantially
Sine wave is presented in pressure, so that the input current waveform in circuit more easily passes through existing standard；
Secondly, in LED linear driving circuit provided by the utility model, metal-oxide-semiconductor uses discrete device, by will be each
Metal-oxide-semiconductor is placed on PCB with juxtaposition, so that the position placement of metal-oxide-semiconductor is more flexible, effectively improves dissipating for metal-oxide-semiconductor
Hot property and reliability；
Again, the current detection circuit in the utility model LED linear driving circuit includes the 8th resistance and the 9th electricity
Resistance, by the way that the 4th diode is arranged, with the be junction voltage of triode Q2 in compensating error amplifying circuit, so that current waveform is more
Close to the output voltage of input voltage sample circuit；And by the 9th resistance of setting, further to adjust current waveform more adjunction
The output voltage of nearly input voltage sample circuit, so that circuit realizes high PF and low harmony wave；
Finally, LED linear driving circuit provided by the utility model can be required according to system effectiveness, 1 is arbitrarily used
To the LED load of multistage, and the number of segment of used LED load is more, and efficiency is higher.
Detailed description of the invention
Fig. 1 is the schematic diagram of LED linear driving circuit in the present embodiment；
Fig. 2 is the schematic diagram of the input voltage sample circuit in the present embodiment；
Fig. 3 is the schematic diagram of the error amplifying circuit in the present embodiment；
Fig. 4 is the schematic diagram of the adder circuit in the present embodiment；
Fig. 5 is the schematic diagram of the current detection circuit in the present embodiment；
Fig. 6 is the schematic diagram of the load switching circuit in the present embodiment.
Specific embodiment
The utility model is described in further detail below in conjunction with figure embodiment.
As shown in Figure 1, the LED linear driving circuit in the present embodiment, for driving the n being sequentially connected in series section LED load, this
N sections of LED loads are respectively LED1, LED2, LED3 and LEDn；n≥2；Label 11 is AC power source and rectifier circuit, label 12
For LED load circuit, which includes: input voltage sample circuit 101, error amplifying circuit 102, adds
Adder circuit 103, current detection circuit 104 and load switching circuit 105；Wherein:
The first input end of input voltage sample circuit 101 is connected with the LED1 anode loaded or cathode, input voltage
First output end of sample circuit 101 is connected with the first input end of error amplifying circuit 102, input voltage sample circuit 101
Second output terminal ground connection；Hereby it is achieved that the shapes and sizes for obtaining input voltage, as error amplifying circuit 102
Reverse input end；
Second input terminal of error amplifying circuit 102 is connected with the first output end of adder circuit 103, error amplification electricity
First output end on road 102 is connected with the first input end of load switching circuit 105；Hereby it is achieved that for controlling LED load electricity
The size and shape of stream, to obtain the shape of certain value close to the input current of key player on a team's wave；
The first input end of adder circuit 103 is connected with the first output end of current detection circuit 104, adder circuit
103 the second input terminal is connected with the LEDn cathode loaded；Hereby it is achieved that big comprising LED load electric current for generating one
The voltage of the sum of small and input voltage size is realized constant substantially with offsetting input power variation caused by input voltage changes
Input power or input current；
The first input end of current detection circuit 104 is connected with the first output end of load switching circuit 105, current detecting
The second output terminal of circuit 104 is grounded；Hereby it is achieved that the voltage signal for LED load electric current to be changed into certain ratio；
Second input terminal of load switching circuit 105 is connected with the LED1 cathode loaded, loads the third of switching circuit 105
Input terminal is connected with the LED2 cathode loaded, and so on, load the n-th input terminal of switching circuit 105 and bearing for LEDn load
Extremely it is connected.Hereby it is achieved that the load number for switching LED, to guarantee to have enough LED by point in the case that voltage is certain
It is bright, to obtain higher power-efficient.
Line voltage generates the absolute value waveform an of sine wave after rectifier circuit 11, and the waveform is by input electricity
Sample circuit 101 is pressed, generates the absolute value of the sine wave of a certain value in the first output end of input voltage sample circuit 101
Waveform, 102 back-reference voltage of error amplifying circuit.
When voltage is gradually increased to be greater than the turning-on voltage of LED1 load by 0V, the inside control of load switching circuit 105
Circuit processed is opened its second input terminal to the metal-oxide-semiconductor between the first output end, and metal-oxide-semiconductor can also reach LED1 in voltage
It is opened before the turning-on voltage of load, generates electric current in LED1 load at this time, which flows through current detection circuit 104 and return again
To ground wire, the voltage of a certain value is generated in the first output end of current detection circuit 104, which passes through adder circuit
103 reach the second input terminal of error amplifying circuit 102；If the voltage is greater than the output electricity of input voltage sample circuit 101
Pressure, then load the metal-oxide-semiconductor grid voltage inside switching circuit 105 and dragged down by the first output end of error amplifying circuit 102, on the contrary
It is then raised, therefore the circuit can make the current waveform for flowing through LED load consistent with input voltage waveform；
When voltage continues to rise to voltage of the voltage loaded greater than LED1 plus LED1 load, switching circuit is loaded
105 are opened its third input terminal to the metal-oxide-semiconductor between the first output end, while loading the input of switching circuit 105 second
It holds to the metal-oxide-semiconductor between the first output end and is closed, test LED1 load and LED2 load generate electric current, and current waveform is the same as above-mentioned
Equally it is in slave mode；And so on, until LED n load is opened；
When the output voltage drops, loaded for LED n load~LED1, then since LED n load by opposite direction according to
A duty cycle is completed in secondary closing.
When input voltage virtual value increases, the voltage that input voltage sample circuit 101 exports also increases, if control is not added
System, input power also with increase will need that compensation circuit is added.Specifically, it is exported for input voltage sample circuit 101
Voltage control then realized by adder circuit 103.In the present embodiment, the second input terminal of adder circuit 103 with
The cathode of LEDn load is connected, the second input terminal of the adder circuit 103 can also with any to react input voltage effective
The node of the variation of value is connected.When input voltage virtual value increase when, LEDn load cathode voltage on virtual value also with
Increase, so that the voltage of the second input terminal of adder circuit 103 also increases, therefore the first output end of adder circuit 103
Voltage also increases, so that the second input terminal (forward direction) voltage of error amplifying circuit 102 increases；For error amplifying circuit 102
For, if its forward and reverse voltage increases identical amplitude, output is constant, i.e. LED load electric current is constant；If it is just
It is greater than reversely to amplitude is increased, the output of LED load electric current becomes smaller, and the amplitude for reasonably adjusting the two can make the circuit be in perseverance
Stream or invariable power state.
Fig. 2 is the schematic diagram of input voltage sample circuit 101 in the present embodiment.In Fig. 2, the first end of resistance R4 is connected
The first input end of input voltage sample circuit 101, the first of the second end connection input voltage sample circuit 101 of resistance R4 are defeated
Outlet；First output end of the first end connection input voltage sample circuit 101 of resistance R5, the second end ground connection of resistance R5.Through
Cross resistance R4, the partial pressure of R5 obtains certain value input voltage, on the one hand provides the current waveform of reference, on the one hand provides electric current
Amplitude reference.
Fig. 3 is the schematic diagram of error amplifying circuit 102 in the present embodiment.In Fig. 3, error amplifying circuit 102 includes three
Pole pipe Q1 and triode Q2, triode Q1 are PNP type triode, the base stage and the collector phase of triode Q2 of triode Q1
Even, the emitter of triode Q1 is connected with the first output end of error amplifying circuit 102, the grounded collector of triode Q1；Three
Pole pipe Q2 is NPN type triode, and the base stage of triode Q2 is connected with the second input terminal of error amplifying circuit 102, triode
The emitter of Q2 is connected with the first input end of error amplifying circuit 102.
When LED output electric current is greater than the set value, the driving current of the pole be of triode Q2 be will increase, and the electric current is by three poles
Pipe Q2 amplifies and is used to the pole be of driving triode Q1, so that the collector current of triode Q1 also increases, so that load
The driving voltage of 105 inside metal-oxide-semiconductor of switching circuit declines, and achievees the effect that make LED output electric current decline, otherwise still, finally
So that LED output electric current is consistent with the sampled voltage of voltage sampling circuit 101.
Fig. 4 is the schematic diagram of adder circuit 103 in the present embodiment.In Fig. 4, adder circuit 103 includes resistance R6
It is connected with the first end of resistance R7, resistance R6 with the first input end of adder circuit 103, the second end and adder of resistance R6
First output end of circuit 103 is connected；The first end of resistance R7 is connected with the second input terminal of adder circuit 103, resistance R7
Second end be connected with the first output end of adder circuit 103.
Since the resistance value of resistance R6 and resistance R7 are much larger than the internal resistance of current detection circuit 104, therefore approximate electric current can be examined
A voltage source is regarded in the output of slowdown monitoring circuit 104, and the output of adder can be approximately that the output voltage of current detection circuit 104 adds
The LEDn of upper certain ratio loads cathode voltage, and ratio is R6/ (R6+R7).
Fig. 5 is the schematic diagram of current detection circuit 104 in the present embodiment.In Fig. 5, current detection circuit 104 includes the
Four diode D4, the 8th resistance R8 and the 9th resistance R9；4th diode D4 and the 9th resistance R9 are in parallel；
The anode of 4th diode D4 is connected with the first input end of current detection circuit 104, and the 4th diode D4's is negative
Pole is connected with the first end of resistance R8；The second end of resistance R8 is grounded.
Resistance R8 is current sampling resistor, and the 4th diode D4 is for triode Q2 in compensating error amplifying circuit 102
Be junction voltage so that current waveform is more nearly the output voltage of input voltage sample circuit 101；Resistance R9 is used as auxiliary,
Further adjustment current waveform is more nearly the output voltage of input voltage sample circuit 101, so that circuit realizes high PF
And low harmony wave.
Fig. 6 is the schematic diagram that switching circuit 105 is loaded in the present embodiment.Load switching circuit 105 includes: the first switching
Circuit 1051, the second switching circuit 1052, third switching circuit 1053, and so on, until the n-th switching circuit 105n；N is to need
The switching circuit quantity wanted, quantity more multisystem efficiency are higher.Wherein:
The first input end of first switching circuit 1051 is connected with the third input terminal of load switching circuit 105, and first cuts
It changes the second input terminal of circuit 1051 to be connected with the first input end of load switching circuit 105, the of the first switching circuit 1051
Three input terminals are connected with the second input terminal of load switching circuit 105, the first output end of the first switching circuit 1051 and load
First output end of switching circuit 105 is connected；
The first input end of second switching circuit 1052 is connected with the 4th input terminal of load switching circuit 105, and second cuts
It changes the second input terminal of circuit 1052 to be connected with the first input end of load switching circuit 105, the of the second switching circuit 1052
Three input terminals are connected with the third input terminal of load switching circuit 105, the first output end of the second switching circuit 1052 and load
First output end of switching circuit 105 is connected；The connection type of third switching circuit 11053 and so on；N-th switching circuit
The first input end of 105n is connected with the n-th input terminal of load switching circuit 105, the second input terminal of the n-th switching circuit 105n
It is connected with the first input end of load switching circuit 105, the third input terminal and load switching circuit of the n-th switching circuit 105n
105 the n-th input terminal is connected, the first output end and the first output end phase of load switching circuit 105 of the n-th switching circuit 105n
Even.
For any one switching circuit 105x of 1051~the n-th switching circuit 105n of the first switching circuit, the n-th switching
Circuit 105n includes: xth resistance Rx, xth diode Dx, xth metal-oxide-semiconductor Mx and xth controllable switch.It is convenient for statement, here
Number x indicates xth switching circuit 105x, 1≤x≤n；
Xth one end resistance Rx is connected with the grid of xth metal-oxide-semiconductor Mx, and the other end is connected with the drain electrode of xth metal-oxide-semiconductor Mx；The
The anode of x diode Dx is connected with the grid of xth metal-oxide-semiconductor Mx, and the of the cathode of xth diode Dx and xth switching circuit 105x
Two input terminals are connected；
The grid of xth metal-oxide-semiconductor Mx is connected with switch one end of controllable switch Sx, and the drain electrode of xth metal-oxide-semiconductor Mx is cut with xth
The third input terminal for changing circuit 105x is connected, the first output end phase of the source electrode and xth switching circuit 105x of xth metal-oxide-semiconductor Mx
Even；The switch other end of controllable switch Sx is connected with the first output end of xth switching circuit 105x, controllable switch Sx switch control
The anode at end is connected with the first input end of xth switching circuit 105x, and the cathode and xth of controllable switch Sx switch control terminal switch
The first output end of circuit 105x is connected.
The effect of xth resistance Rx is to provide the voltage for opening xth metal-oxide-semiconductor Mx, which needs in the metal-oxide-semiconductor
There is provided when voltage occurs in drain electrode or before, that is, the sum of the forward voltage of input voltage equal to LED1+LED2+LEDm it
When or before, xth metal-oxide-semiconductor will be in opening state, the leakage of the xth metal-oxide-semiconductor is not limited to for the position of electrical connection
Pole, the drain electrode or its other any voltage that are also possible to xth metal-oxide-semiconductor are higher than the node of the drain electrode of xth metal-oxide-semiconductor.Xth simultaneously
The drain electrode of metal-oxide-semiconductor can be dragged down the grid of xth -1MOS pipe by controllable switch Sx-1 when there is voltage, i.e. closing xth -
1MOS pipe；Since the grid of each metal-oxide-semiconductor is connected to same point by diode Dx, drag down will not shadow for metal-oxide-semiconductor grid voltage all the way
Ring the open-minded of other metal-oxide-semiconductors.It thus can switch LED load when voltage increases, be led so that the LED load more than as far as possible is in
Logical state, that is, improve system effectiveness；The then inverted running when voltage decline.
The control signal of each controllable switch Sx is from the number of winning the confidence in the drain electrode of metal-oxide-semiconductor Mx+1, but the last one is controllably opened
Closing Sn is to obtain signal from metal-oxide-semiconductor Mn, and the effect of the signal is not intended to switching LED load, but in order to realize input
Electric voltage over press protection can make circuit be in guard mode when input voltage is excessively high, i.e. metal-oxide-semiconductor Mn is closed, entire circuit
Do not export.
Although the preferred embodiments of the utility model have been described above in detail, it is to be clearly understood that for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within any modification, equivalent replacement, improvement and so on, should be included within the scope of protection of this utility model.
Claims (6)
1. a kind of LED linear driving circuit, for driving the n being sequentially connected in series section LED load, the first segment LED load is just
Pole connects DC voltage electrode, and the cathode of (n-1)th section of LED load connects the anode of n-th section of LED load；n≥2；Its
It is characterized in that, the LED linear driving circuit includes: input voltage sample circuit, error amplifying circuit, adder circuit, electricity
Current detection circuit and load switching circuit；Wherein:
The first input end of the input voltage sample circuit is connected with the anode of first segment LED load or cathode, described defeated
The first output end for entering voltage sampling circuit is connected with the first input end of the error amplifying circuit, the input voltage sampling
The second output terminal of circuit is grounded；
Second input terminal of the error amplifying circuit is connected with the first output end of the adder circuit, the error amplification
First output end of circuit is connected with the first input end of the load switching circuit；
The first input end of the adder circuit is connected with the first output end of the current detection circuit, the adder electricity
Second input terminal on road is connected with n-th section of LED load cathode；
The first input end of the current detection circuit is connected with the first output end of the load switching circuit, the electric current inspection
The second output terminal of slowdown monitoring circuit is grounded；
N-th input terminal of the load switching circuit is connected with the cathode of (n-1)th section of LED load.
2. LED linear driving circuit according to claim 1, which is characterized in that the input voltage sample circuit includes:
4th resistance and the 5th resistance；The first end of 4th resistance connects the first input end of the input voltage sample circuit,
The second end of 4th resistance connects the first output end of the input voltage sample circuit；The first end of 5th resistance
Connect the first output end of the input voltage sample circuit, the second end ground connection of the 5th resistance.
3. LED linear driving circuit according to claim 1, which is characterized in that the error amplifying circuit includes: first
Triode and the second triode；First triode is PNP type triode, the base stage of first triode and described second
The collector of triode is connected, and the emitter of first triode is connected with the first output end of the error amplifying circuit,
The grounded collector of first triode；
Second triode is NPN type triode, the base stage of second triode and the second of the error amplifying circuit
Input terminal is connected, and the emitter of second triode is connected with the first input end of error amplifying circuit.
4. LED linear driving circuit according to claim 1, which is characterized in that the adder circuit includes: the 6th electricity
Resistance and the 7th resistance；The first end of 6th resistance is connected with the first input end of the adder circuit, the 6th electricity
The second end of resistance is connected with the first output end of the adder circuit；
The first end of 7th resistance is connected with the second input terminal of the adder circuit, the second end of the 7th resistance
It is connected with the first output end of the adder circuit.
5. LED linear driving circuit according to claim 1, which is characterized in that the current detection circuit includes: the 4th
Diode, the 8th resistance and the 9th resistance；4th diode and the 9th resistor coupled in parallel, the 4th diode anode with
The first input end of the current detection circuit is connected, the first end phase of the cathode and the 8th resistance of the 4th diode
Even, the second end ground connection of the 8th resistance.
6. LED linear driving circuit according to claim 1, which is characterized in that the load switching circuit includes: first
Switching circuit and the second switching circuit；Wherein:
The first input end of first switching circuit is connected with the third input terminal of the load switching circuit, and described first cuts
The second input terminal for changing circuit is connected with the first input end of the load switching circuit, and the third of first switching circuit is defeated
Enter end to be connected with the second input terminal of the load switching circuit, the first output end of first switching circuit and the load
First output end of switching circuit is connected；
The first input end of second switching circuit is connected with the 4th input terminal of the load switching circuit, and described second cuts
The second input terminal for changing circuit is connected with the first input end of the load switching circuit, and the third of second switching circuit is defeated
Enter end to be connected with the third input terminal of the load switching circuit, the first output end of second switching circuit and the load
First output end of switching circuit is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014712.9U CN209234083U (en) | 2018-06-29 | 2018-06-29 | A kind of LED linear driving circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821014712.9U CN209234083U (en) | 2018-06-29 | 2018-06-29 | A kind of LED linear driving circuit |
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| Publication Number | Publication Date |
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| CN209234083U true CN209234083U (en) | 2019-08-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566702A (en) * | 2018-06-29 | 2018-09-21 | 宁波伟依特照明电器有限公司 | A kind of LED linear driving circuit |
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2018
- 2018-06-29 CN CN201821014712.9U patent/CN209234083U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108566702A (en) * | 2018-06-29 | 2018-09-21 | 宁波伟依特照明电器有限公司 | A kind of LED linear driving circuit |
| CN108566702B (en) * | 2018-06-29 | 2024-02-27 | 宁波伟依特照明电器有限公司 | LED linear driving circuit |
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