CN206283689U - The LED tube drive circuit of the compatible electric ballast of three-stage dimming - Google Patents
The LED tube drive circuit of the compatible electric ballast of three-stage dimming Download PDFInfo
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- CN206283689U CN206283689U CN201621362283.5U CN201621362283U CN206283689U CN 206283689 U CN206283689 U CN 206283689U CN 201621362283 U CN201621362283 U CN 201621362283U CN 206283689 U CN206283689 U CN 206283689U
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Abstract
The utility model discloses a kind of LED tube drive circuit of the compatible electric ballast of three-stage dimming, the circuit includes prime current rectifying and wave filtering circuit and three-stage dimming circuit；Four pins of LED lamp tube access the input of prime current rectifying and wave filtering circuit, and the output end of the prime current rectifying and wave filtering circuit is connected with the input of three-stage dimming circuit, and the output end connection LED lamp tube of the three-stage dimming circuit positive pole and negative pole.The utility model causes that the drive circuit combines compatible electronic ballast, the input of four ends and three features of three-stage dimming, the dimming energy-saving demand that engineering is replaced in LED lamp tube illumination can be better met, dimming function is capable of achieving original power supply circuit need not be transformed, the purpose of energy-conservation is reached.
Description
Technical field
The utility model is related to LED lamp tube technical field, more particularly to a kind of compatible electric ballast of three-stage dimming
LED tube drive circuit.
Background technology
Fluorescent lamp is much still generally used in old projects transformation and replacement in the market, and fluorescent lamp contains
Ballast, many clients consider cost of labor and operability, are not desired to ballast to dismantle, and this requires that LED lamp tube can
Compatible electronic ballast.In the case where original electric ballast is non-dimmable, the LED lamp tube of compatible electronic ballast is done not
To dimming function, it is impossible to accomplish energy-conservation.
The content of the invention
For weak point present in above-mentioned technology, the utility model provides a kind of compatible electronic ballast of three-stage dimming
The LED tube drive circuit of device, the circuit combines compatible electronic ballast, the input of four ends and three features of three-stage dimming, energy
Enough better meet the dimming energy-saving demand that engineering is replaced in LED lamp tube illumination.
To achieve the above object, the utility model provides a kind of LED lamp tube of the compatible electric ballast of three-stage dimming and drives
Dynamic circuit, including prime current rectifying and wave filtering circuit and three-stage dimming circuit；Four pins of LED lamp tube access prime rectifying and wave-filtering electricity
The input on road, the output end of the prime current rectifying and wave filtering circuit is connected with the input of three-stage dimming circuit, and described three sections
The output end of light adjusting circuit connects the positive pole and negative pole of LED lamp tube.
Wherein, the prime current rectifying and wave filtering circuit includes the first fuse, the second fuse, the 3rd fuse, the first electricity
Appearance, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, common mode inductance, the first differential mode inductance and the second differential mode inductance；The of LED lamp tube
By the first fuse and the first capacitance connection, the second pin of LED lamp tube connects the to one pin respectively by the second fuse
One electric capacity and the second electric capacity, the 3rd pin of LED lamp tube connect the second electric capacity and the 3rd electric capacity respectively, and the 4th of LED lamp tube draws
Pin connects the 3rd electric capacity by the 3rd fuse, and the 4th electric capacity is connected between first electric capacity and the 3rd electric capacity；Described first
The common port that the common port and the second fuse and the second electric capacity that electric capacity and the second electric capacity are formed are formed connects the first rectification
Bridge, the common port that the common port and the 3rd fuse and the 3rd electric capacity that second electric capacity and the 3rd electric capacity are formed are formed is equal
It is connected to the second rectifier bridge；First rectifier bridge and the second rectifier bridge are connected to one end of common mode inductance, the common mode electricity
The other end of sense is electrically connected with the first differential mode inductance and the second differential mode inductance respectively, and first is parallel with first differential mode inductance
Resistance, is parallel between second resistance, and first differential mode inductance and the second differential mode inductance on second differential mode inductance and connects
It is connected to the 5th electric capacity and the 6th electric capacity of parallel connection；And first differential mode inductance and the second differential mode inductance are and three-stage dimming circuit
Electrical connection.
Wherein, the three-stage dimming circuit includes chip, the first polar capacitor, the second polarity electricity of model RM9292D
Hold and inductance, the positive pole that the first differential mode inductance passes through the 7th capacitance connection to LED lamp tube, first differential mode inductance is also by string
The 3rd resistor of connection and the 4th resistance are connected to the second pin of chip, and the first differential mode inductance is further connected to the 5th of chip
Pin and the 6th pin；Second differential mode inductance is connected to the 4th pin of chip, and the second differential mode by the first diode
Inductance is additionally coupled to the negative pole of LED lamp tube；The common port that the second pin of the 4th resistance and chip is formed by connect the
Five resistance and the second diode are connected to one end of inductance, and the 5th resistance is connected to the positive pole of the first polar capacitor, the first polarity
The negative pole of electric capacity is connected to the common port that inductance and the second diode are formed by the 6th resistance connected and the 7th resistance；Institute
The one end for stating inductance is also connected with the positive pole of the second polar capacitor, the negative pole of the second polar capacitor be connected to the second differential mode inductance with
Between the negative pole of LED lamp tube, the positive pole of the LED lamp tube is connected to the negative pole of LED lamp tube by the 8th resistance；The first of chip
Pin connects the 8th electric capacity, is grounded after the 7th pin of chip and the connection of the 8th pin, and the 7th pin and the 8th of chip draws
The common port formed with the 8th electric capacity after pin connection is connected to the common port that the first polar capacitor and the 6th resistance are formed；Core
3rd pin of piece is connected between the 6th resistance and the 7th resistance, and the pin of chip the 4th is also by the 9th resistance in parallel, the
Ten resistance and the 11st resistance are connected to the other end of inductance, nineth electric capacity and tenth of the 11st resistance also by connecting
It is connected to after two resistance between the second differential mode inductance and the negative pole of LED lamp tube.
Wherein, first rectifier bridge is by the 3rd diode, the 4th diode, the 5th diode and the 6th diode structure
Into second rectifier bridge is made up of the 7th diode, the 8th diode, the 9th diode and the tenth diode.
The beneficial effects of the utility model are：Compared with prior art, the three-stage dimming that the utility model is provided is compatible
The LED tube drive circuit of electric ballast, the drive circuit includes prime current rectifying and wave filtering circuit and three-stage dimming circuit, works as town
When stream device starts, output has a spike very high, and this spike pair can be effectively reduced by prime current rectifying and wave filtering circuit
The influence of late-class circuit；When ballast normal work, ballast output voltage is operated in the frequency band of high frequency about 60khz, leads to
Crossing prime current rectifying and wave filtering circuit also can effectively suppress the High-frequency Interference of ballast generation；Meanwhile, three-stage dimming circuit has three
Section dimming function, as long as continuous shut-off is switched and quickly reopened when switch dimming is needed.The improvement of said structure,
So that the drive circuit combines compatible electronic ballast, the input of four ends and three features of three-stage dimming, can be more preferable
Meet LED lamp tube illumination replace engineering dimming energy-saving demand, need not transform original power supply circuit i.e. be capable of achieving tune
Light function, reaches the purpose of energy-conservation.
Brief description of the drawings
Fig. 1 is the schematic diagram of prime current rectifying and wave filtering circuit in the utility model；
Fig. 2 is the schematic diagram of three-stage dimming circuit in the utility model.
Main element symbol description is as follows：
10th, prime current rectifying and wave filtering circuit 11, three-stage dimming circuit.
Specific embodiment
In order to more clearly state the utility model, the utility model is further described below in conjunction with the accompanying drawings.
Fig. 1-2 is referred to, the LED lamp tube of the compatible electric ballast of three-stage dimming that the utility model is provided drives electricity
Road, including prime current rectifying and wave filtering circuit 10 and three-stage dimming circuit 11；Four pins of LED lamp tube access prime rectifying and wave-filtering electricity
The input on road 10, the output end of prime current rectifying and wave filtering circuit 10 is connected with the input of three-stage dimming circuit 11, and three sections of tune
The output end of optical circuit 11 connects the positive pole and negative pole of LED lamp tube.
The LED of the compatible electric ballast of three-stage dimming provided compared to the situation of prior art, the utility model
Tube drive circuit, the drive circuit includes prime current rectifying and wave filtering circuit and three-stage dimming circuit, when ballast starts, exports meeting
There is a spike very high, influence of this spike to late-class circuit can be effectively reduced by prime current rectifying and wave filtering circuit；When
During ballast normal work, ballast output voltage is operated in the frequency band of high frequency about 60khz, by prime current rectifying and wave filtering circuit
Also the High-frequency Interference of ballast generation can effectively be suppressed；Meanwhile, three-stage dimming circuit has three-stage dimming function, when needs are opened
As long as continuous shut-off is switched and quickly reopened when closing light modulation.The improvement of said structure so that the drive circuit is combined
Compatible electronic ballast, the input of four ends and three-stage dimming three features, can better meet LED lamp tube illumination and replace
The dimming energy-saving demand of engineering is changed, dimming function is capable of achieving original power supply circuit need not be transformed, reach the mesh of energy-conservation
's.
Referring to Fig. 1, prime current rectifying and wave filtering circuit 10 includes that the first fuse F1, the second fuse F2, the 3rd protect
Dangerous silk F3, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the 4th electric capacity C4, common mode inductance L1, the first differential mode inductance L2
With the second differential mode inductance L3；First pin AC1 of LED lamp tube is connected by the first fuse F1 with the first electric capacity C1, LED lamp tube
Second pin AC2 the first electric capacity C1 and the second electric capacity C2, the 3rd pin of LED lamp tube are connected by the second fuse F2 respectively
AC3 connects the second electric capacity C2 and the 3rd electric capacity C3 respectively, and the 4th pin AC4 of LED lamp tube connects the by the 3rd fuse F3
Three electric capacity C3, connect the 4th electric capacity C4 between the first electric capacity C1 and the 3rd electric capacity C3；First electric capacity C1 and the second electric capacity C2 are formed
Common port and the common port that is formed of the second fuse F2 and the second electric capacity C2 connect the first rectifier bridge, the second electric capacity C2 and the
It is whole that the common port that the common port and the 3rd fuse F3 and the 3rd electric capacity C3 that three electric capacity C3 are formed are formed is connected to second
Stream bridge；First rectifier bridge and the second rectifier bridge are connected to one end of common mode inductance L1, the other end of common mode inductance L1 respectively with
First differential mode inductance L2 and the second differential mode inductance L3 is electrically connected, and first resistor R1 is parallel with the first differential mode inductance L2, and second is poor
It is parallel with mould inductance L3 between second resistance R2, and the first differential mode inductance and the second differential mode inductance and is connected with the 5th electricity in parallel
Hold C5 and the 6th electric capacity C6；And first differential mode inductance L2 and the second differential mode inductance L3 electrically connected with three-stage dimming circuit 11.The
One rectifier bridge is made up of the 3rd diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6, the second rectifier bridge
It is made up of the 7th diode D7, the 8th diode D8, the 9th diode D9 and the tenth diode D10.Prime current rectifying and wave filtering circuit
10 compatible electronic ballasts and four ends are input into.
Referring to Fig. 2, three-stage dimming circuit 11 include the chip U of model RM9292D, the first polar capacitor C10,
Second polar capacitor C11 and inductance L4, the first differential mode inductance L2 are connected to the positive pole of LED lamp tube, first by the 7th electric capacity C7
Differential mode inductance L2 is also connected to the second pin of chip, the first differential mode inductance by the 3rd resistor R3 for connecting and the 4th resistance R4
L2 is further connected to the 5th pin and the 6th pin of chip；Second differential mode inductance L3 is connected to core by the first diode D1
4th pin of piece, and the second differential mode inductance L3 is additionally coupled to the negative pole of LED lamp tube；The second pin of the 4th resistance R4 and chip
The common port for being formed is connected to one end of inductance L4, the 5th resistance R5 by the 5th resistance R5 for connecting and the second diode D2
The positive pole of the first polar capacitor C10 is connected to, the negative pole of the first polar capacitor C10 passes through the 6th resistance R65 and the 7th for connecting
Resistance R7 is connected to the common port that inductance L4 and the second diode D2 are formed；One end of inductance L4 is also connected with the second polar capacitor
The positive pole of C11, the negative pole of the second polar capacitor C11 is connected between the second differential mode inductance L3 and the negative pole of LED lamp tube, LED
The positive pole of pipe is connected to the negative pole of LED lamp tube by the 8th resistance R8；First pin of chip connects the 8th electric capacity C8, chip
7th pin and the 8th pin connection after be grounded, and chip U the 7th pin and the 8th pin connection after with the 8th electric capacity C8 institutes
The common port of formation is connected to the common port that the first polar capacitor C10 and the 6th resistance R6 are formed；3rd pin of chip connects
It is connected between the 6th resistance R6 and the 7th resistance R7, the pin of chip the 4th is also by the 9th resistance R9, the tenth resistance R10 in parallel
With the other end that the 11st resistance R11 is connected to inductance L4, nineth electric capacity C9s and tenth of the 11st resistance R11 also by connecting
It is connected between the second differential mode inductance and the negative pole of LED lamp tube after two resistance R12.
During wiring, powered operation by any 2 pin connection of 4 pins of LED lamp tube can avoid wrong line from leading
The damage of cause equipment.When ballast starts, output has a spike very high, by the prime current rectifying and wave filtering circuit of Fig. 1
Influence of this spike to late-class circuit, the particularly impact of chip U can be effectively reduced；When ballast normal work, town
Stream device output voltage is operated in the frequency band of high frequency about 60khz, also can effectively be suppressed by the prime current rectifying and wave filtering circuit of Fig. 1
The High-frequency Interference that ballast is produced.
Three-stage dimming circuit 11 has following advantage：
1）Start control
The starting current of RM9292D is very small, when VDD is charged and voltage is owed higher than it by 3rd resistor and the 4th resistance
After pressure locking shut-off voltage, RM9292D quickly starts, the first pin COMP voltages of chip by fast pull-up to 1.5V, then
RM9292D starts output pulse signal, and system has just begun operating in 10KHz switching frequencies, COMP voltages since 1.5V by
Gradually rise, inductance peak point current rises therewith, so as to realize exporting the soft start of LED electric currents, effectively prevent output current mistake
Punching, after output voltage is set up, VDD voltages are supplied by output voltage by the second diode, the 5th resistance and the first polar capacitor
Electricity, so as to reduce system power dissipation.
2）Current constant control, output current is set
RM9292D carries out complete period sampling using floating ground framework to inductive current, works in critical current mode continuous
Pattern, it is possible to achieve high accuracy output constant current is controlled.When RM9292D inside mos is turned on, by the 5th pin of chip, the
Six pins, the 4th pin, the 9th resistance R9 in parallel, the tenth resistance R10 and the 11st resistance R11, inductance, the second polarity electricity
Hold, load LED lamp pipe constitutes loop, inductive energy storage, the second polar capacitor energy storage, load supplying；When the 9th resistance R9 in parallel,
When the voltage of the tenth resistance R10 and the 11st resistance R11 reaches the reference voltage V REF=1V of the 4th pin of chip, RM9292D
Close internal mos pipes, inductance, the second polar capacitor, load LED lamp, the first diode, the 9th resistance R9 in parallel, the tenth electricity
Resistance R10 and the 11st resistance R11 constitutes loop, and inductance releases energy, and the second polar capacitor releases energy, load supplying, when the in parallel the 9th
When resistance R9, the voltage=0V of the tenth resistance R10 and the 11st resistance R11, RM9292D enters next cycle.Wherein, the 8th
Resistance is fictitious load.
3）Optional three-stage dimming function
RM9292D has three-stage dimming function, as long as continuous shut-off is switched and quickly beaten again when switch dimming is needed
Open, output current will be by 100%--50% -- 25% order change；Dimming function effective time is 1 second.If shut-off is opened
Then output current will not change to reopen switch after closing more than 1 second again, always remain as 100%.
4）FBN feedback network
RM9292D detects the state of output current zero passage by the 3rd pin FB, and the falling-threshold value voltage of FB is set
In 0.2V, hysteresis voltage is 0.15V.Distributed by the voltage of the 6th resistance and the 7th resistance, FB pin can be used to detection output
Overvoltage protection（OVP）, threshold voltage is 1.6V.
, for the demand of in the market, being developed using the driving chip of three-stage dimming can be with compatible electronic ballast for the design
LED lamp tube, three degree of being in the light are switched by switching civil power, it is not necessary to transform original power supply circuit i.e. be capable of achieving light modulation work(
Energy.
Disclosed above is only several specific embodiments of the present utility model, but the utility model is not limited to this,
The changes that any person skilled in the art can think of should all fall into protection domain of the present utility model.
Claims (4)
1. the LED tube drive circuit of the compatible electric ballast of a kind of three-stage dimming, it is characterised in that including prime rectification filter
Wave circuit and three-stage dimming circuit；Four pins of LED lamp tube access the input of prime current rectifying and wave filtering circuit, and the prime is whole
The output end for flowing filter circuit is connected with the input of three-stage dimming circuit, and the output end of the three-stage dimming circuit is connected
The positive pole and negative pole of LED lamp tube.
2. the LED tube drive circuit of the compatible electric ballast of three-stage dimming according to claim 1, its feature exists
In the prime current rectifying and wave filtering circuit includes the first fuse, the second fuse, the 3rd fuse, the first electric capacity, the second electricity
Appearance, the 3rd electric capacity, the 4th electric capacity, common mode inductance, the first differential mode inductance and the second differential mode inductance；First pin of LED lamp tube leads to
Cross the first fuse and the first capacitance connection, the second pin of LED lamp tube by the second fuse connect respectively the first electric capacity and
Second electric capacity, the 3rd pin of LED lamp tube connects the second electric capacity and the 3rd electric capacity respectively, and the 4th pin of LED lamp tube is by the
Three fuses connect the 3rd electric capacity, and the 4th electric capacity is connected between first electric capacity and the 3rd electric capacity；First electric capacity and
Common port that the common port and the second fuse and the second electric capacity that two electric capacity are formed are formed connects the first rectifier bridge, and described the
The common port that the common port and the 3rd fuse and the 3rd electric capacity that two electric capacity and the 3rd electric capacity are formed are formed is connected to
Two rectifier bridges；First rectifier bridge and the second rectifier bridge are connected to one end of common mode inductance, the common mode inductance it is another
End electrically connects with the first differential mode inductance and the second differential mode inductance respectively, is parallel with first resistor on first differential mode inductance, institute
State and second resistance is parallel with the second differential mode inductance, and be connected between first differential mode inductance and the second differential mode inductance in parallel
The 5th electric capacity and the 6th electric capacity；And first differential mode inductance and the second differential mode inductance are electrically connected with three-stage dimming circuit.
3. the LED tube drive circuit of the compatible electric ballast of three-stage dimming according to claim 2, its feature exists
In, the three-stage dimming circuit includes chip, the first polar capacitor, the second polar capacitor and the inductance of model RM9292D, the
The positive pole that one differential mode inductance passes through the 7th capacitance connection to LED lamp tube, threeth electricity of first differential mode inductance also by connecting
Resistance and the 4th resistance are connected to the second pin of chip, and the first differential mode inductance is further connected to the 5th pin and the 6th of chip
Pin；Second differential mode inductance is connected to the 4th pin of chip by the first diode, and the second differential mode inductance is also connected with
To the negative pole of LED lamp tube；The common port that the second pin of the 4th resistance and chip is formed is by the 5th resistance connected and the
Two diodes are connected to one end of inductance, and the 5th resistance is connected to the positive pole of the first polar capacitor, the negative pole of the first polar capacitor
The common port that inductance and the second diode are formed is connected to by the 6th resistance and the 7th resistance connected；The one of the inductance
End is also connected with the positive pole of the second polar capacitor, and it is negative with LED lamp tube that the negative pole of the second polar capacitor is connected to the second differential mode inductance
Between pole, the positive pole of the LED lamp tube is connected to the negative pole of LED lamp tube by the 8th resistance；The first pin connection the of chip
Eight electric capacity, the 7th pin of chip and the 8th pin connection after be grounded, and chip the 7th pin and the 8th pin connection after with
The common port that 8th electric capacity is formed is connected to the common port that the first polar capacitor and the 6th resistance are formed；The 3rd of chip draws
Pin is connected between the 6th resistance and the 7th resistance, and the pin of chip the 4th is also by the 9th resistance in parallel, the tenth resistance and the
11 resistance are connected to the other end of inductance, and the 11st resistance also connects by the 9th electric capacity connected and after the 12nd resistance
It is connected between the second differential mode inductance and the negative pole of LED lamp tube.
4. the LED tube drive circuit of the compatible electric ballast of three-stage dimming according to claim 2, its feature exists
In, first rectifier bridge is made up of the 3rd diode, the 4th diode, the 5th diode and the 6th diode, and described second
Rectifier bridge is made up of the 7th diode, the 8th diode, the 9th diode and the tenth diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362283.5U CN206283689U (en) | 2016-12-13 | 2016-12-13 | The LED tube drive circuit of the compatible electric ballast of three-stage dimming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621362283.5U CN206283689U (en) | 2016-12-13 | 2016-12-13 | The LED tube drive circuit of the compatible electric ballast of three-stage dimming |
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| Publication Number | Publication Date |
|---|---|
| CN206283689U true CN206283689U (en) | 2017-06-27 |
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ID=59072225
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621362283.5U Active CN206283689U (en) | 2016-12-13 | 2016-12-13 | The LED tube drive circuit of the compatible electric ballast of three-stage dimming |
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| Country | Link |
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| CN (1) | CN206283689U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399672A (en) * | 2020-11-02 | 2021-02-23 | 厦门市义圆源科技有限公司 | Dimming lamp tube compatible with electronic ballast |
-
2016
- 2016-12-13 CN CN201621362283.5U patent/CN206283689U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399672A (en) * | 2020-11-02 | 2021-02-23 | 厦门市义圆源科技有限公司 | Dimming lamp tube compatible with electronic ballast |
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