CN106714399B - LED driving circuit and signal processing method - Google Patents
LED driving circuit and signal processing method Download PDFInfo
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- CN106714399B CN106714399B CN201510481788.7A CN201510481788A CN106714399B CN 106714399 B CN106714399 B CN 106714399B CN 201510481788 A CN201510481788 A CN 201510481788A CN 106714399 B CN106714399 B CN 106714399B
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Abstract
A kind of LED driving circuit and signal processing method, the LED driving circuit include input rectifying module, impedance matching module, control system, Power Factor Correction Control chip and output rectification module.Input rectifying module is used to the alternating current of input being converted into direct current；Impedance matching module is used to provide the impedance matching of the input rectifying module and inhibits electromagnetic interference；Control system and Power Factor Correction Control chip are connect with the impedance matching module and the input rectifying module, for being adjusted to the direct current and the output electric current of output-controlled system；And output rectification module is for rectifying the output electric current and being exported to external light-emitting circuit.
Description
Technical field
It is espespecially a kind of to improve and electronics town the present invention relates to a kind of LED driving circuit and signal processing method
Flow the LED driving circuit and signal processing method of device compatibility.
Background technique
In passing illumination market, a large amount of tradition CFL fluorescent tube class products are used in various office business places.CFL lamp
Tubing product such as T8, T10 and T5 fluorescent tube is usually mounted with corresponding electric ballast, for example, Fig. 1 shows such one
Kind has the circuit of electric ballast, which exports high-frequency alternating current.
Nowadays, more and more light emitting diode (LED) lamps and lanterns are instead of traditional CFL fluorescent tube.Reason is that LED light source has
There are apparent advantage, such as higher light efficiency, longer service life etc..Therefore, it is desirable to replace CFL fluorescent tube in many cases
Change LED lamp tube into.However, replacement process be not but it is easy to accomplish, in order to which CFL fluorescent tube is substituted for LED lamp tube, need to original
Some lamp interior routes are modified, and remove or bypass existing electric ballast, while LED lamp tube is replaced in rewiring,
This will bring great cost of labor and cost.
Therefore, directly replacing original CFL fluorescent tube with LED lamp tube is simplest mode, and replacement process is without changing cloth
Line or removal electric ballast.
In existing LED driver, in order to be compatible with conventional electronic ballast, most LED terminal lamp source factories are to hinder
Hold based on linear voltage decreasing scheme, as shown in Figure 2.The characteristics of this scheme is that structure is simple, and power supply is integrally changed with lamp plate, cost
It is low, it is readily produced operation.But there are light output amounts with peripheral condition (input voltage, electronic ballast system, environment temperature)
Change and the defect of catastrophic fluctuation, is difficult to realize the LED high constant current accuracy of single-level power factor correction (PFC) closed-loop control.
Therefore, a kind of high constant current accuracy with single- stage PFC control how is provided and can compatible electronic ballast circuit
LED driving circuit and signal processing method, as each dealer project urgently to be resolved.
Summary of the invention
In view of the disadvantages for the technology that notes, the main object of the present invention is to provide a kind of with single- stage PFC control
High constant current accuracy and can compatible electronic ballast circuit LED driving circuit and signal processing method.
In order to achieve the above object and other purposes, the present invention provide a kind of LED driving circuit then, including defeated
Enter rectification module, impedance matching module, control system, Power Factor Correction Control chip and output rectification module.It is defeated
Enter rectification module for the alternating current of input to be converted into direct current；Impedance matching module is for providing the input rectifying module
Impedance matching simultaneously inhibits electromagnetic interference；Control system and Power Factor Correction Control chip, with the impedance matching module
And input rectifying module connection, for being adjusted to the direct current and the output electric current of output-controlled system；And output
Rectification module is for rectifying the output electric current and being exported to external light-emitting circuit.
The present invention also provides a kind of signal processing methods of LED driving circuit, are applied to raising and electronic ballast
The compatibility of device circuit, which is characterized in that the AC power source from circuit of electronic ballast is connected to as the aforementioned luminous two
The alternating current of input is converted into direct current by the input rectifying module of pole pipe driving circuit, the input rectifying module；With the resistance
Anti- matching module matches the impedance of the input rectifying module and inhibits electromagnetic interference；With control system and power factor school
Positive control chip is adjusted to the direct current and the output electric current of output-controlled system；And it is defeated to this to export rectification module
Electric current is rectified and is exported to external light-emitting circuit out.
Compared to technology is noted, due to LED driving circuit and signal processing method of the invention, function has been used
Rate factor correcting controls chip, therefore has the high constant current accuracy of single- stage PFC control；It in addition to this, will also with input rectifying module
Alternating current is converted into direct current, and impedance matching module is used to provide the impedance matching of the input rectifying module and inhibits electromagnetism dry
Disturb, the direct current is adjusted with control system and Power Factor Correction Control chip and output-controlled system it is defeated
Electric current out, and output rectification module are used to rectify the output electric current and export to external light-emitting circuit, with
The alternating current of circuit of electronic ballast is converted to direct current by this mode, and is adjusted and made it suitable for driving the external light-emitting
Circuit, therefore energy compatible electronic ballast circuit, sufficiently address the missing of the prior art.
Detailed description of the invention
Fig. 1 is the circuit framework figure with electric ballast noted.
Fig. 2 is the circuit framework figure of the capacitance-resistance linear voltage decreasing LED driver noted.
Fig. 3 is the circuit framework schematic diagram of LED driving circuit of the invention.
Fig. 4 is the circuit framework schematic diagram of another embodiment of LED driving circuit of the invention.
Fig. 5 is the internal circuit configuration diagram of Power Factor Correction Control chip of the invention.
Symbol description:
1 LED driving circuit
2 external light-emitting circuits
10 input rectifying modules
11 impedance matching modules
12 control systems
13 Power Factor Correction Control chips
14 output rectification modules
130 feed circuits
131 error amplifiers
132 turn-on time generation circuits
133 frequency adaptive circuits
134 logic circuits
135 driving circuits
136 detection circuits
137 power circuits
Vref reference signal
The first, second rectifier bridge of DB1, DB2
The input terminal of AC1~AC4 first~the 4th
The first, second varistor of VR1, VR2
The first, second fuse of F1, F2
The capacitor of C1~C8 first~the 8th
The first, second inductance of L1, L2
Q1~Q3 first~third switching tube
Q ' 1,2 first, second triode of Q '
The resistance of R1~R16 first~the 16th
The diode of D1~D8 first~the 8th
D ' 1,2 first, second clamper tube of D '
SW1, SW2, VG1, LED, CS, DRV, GND, VIN, COMP, ZCS pin
T1 transformer
The first, second winding of T1A, T1B
The first, second output end of LED1, LED2
Specific embodiment
Illustrate embodiments of the present invention by particular specific embodiment below, those skilled in the art can be by this theory
Other advantages and efficacy of the present invention can be easily understood for the bright revealed content of book.The present invention also can be different specific by other
Embodiment is implemented or is applied.
Referring to Fig. 3, to understand the function mode of LED driving circuit of the present invention.As shown, this
The LED driving circuit 1 of invention includes input rectifying module 10, impedance matching module 11, control system 12, function
Rate factor correcting controls chip 13 and output rectification module 14.
Input rectifying module 10 is used to the alternating current of input being converted into direct current；Impedance matching module 11 is defeated for providing
Enter the impedance matching of rectification module 10 and inhibits electromagnetic interference (EMI)；Add and subtract voltage (Buck-Boost) control module 12 and
Power Factor Correction Control chip 13 is connect with impedance matching module 11 and input rectifying module 10, for the direct current into
The output electric current of row adjustment and output-controlled system；And output rectification module 14 be used for the output electric current carry out rectification and it is defeated
Out to external light-emitting circuit 2.
In an embodiment, the alternating current of the input is from circuit of electronic ballast, through input rectifying module 10, impedance
After matching module 11 is converted into corresponding direct current and is filtered, send to control system 12 and power factor
Correcting controlling chip 13, Power Factor Correction Control chip 13 provide accurate current constant control and PFC correction, finally whole by exporting
Flow module 14 exports constant direct current and supplies electricity to the use of external light-emitting circuit 2.
Referring to Fig. 4, Fig. 4 is the circuit framework schematic diagram of another embodiment of LED driving circuit of the invention.
As shown, input rectifying module 10 can include: the first rectifier bridge DB1 and the second rectifier bridge as composed by high-frequency diode
DB2；With the first rectifier bridge DB1 the first input end AC1 connecting and the second input terminal AC2；And it is connect with the second rectifier bridge DB2
Third input terminal AC3 and the 4th input terminal AC4.First to the 4th input terminal AC1~AC4 meets in tradition CFL tube stand
The needs of four ends input
In an embodiment, input rectifying module 10, which may also include that, is parallel to first input end AC1 and the second input terminal
The first varistor VR1 between AC2；The second varistor being parallel between third input terminal AC3 and the 4th input terminal AC4
VR2；The first fuse F1 being series between first input end AC1 and the first rectifier bridge DB1；And it is series at the second input terminal
The second fuse F2 between AC2 and the first rectifier bridge DB1.
In an embodiment, impedance matching module 11 can include: be parallel to first input end AC1 and the second input terminal AC2
Between first capacitor C1；The second capacitor C2 being parallel between third input terminal AC3 and the 4th input terminal AC4；It is series at
The first inductance L1 between one fuse F1 and the first rectifier bridge DB1；It is parallel to the first rectifier bridge DB1 and the second rectifier bridge DB2
Between the second inductance L2；And the third capacitor C3 being connect with the first rectifier bridge DB1 and the second rectifier bridge DB2.
In an embodiment, high frequency that input rectifying module 10 and impedance matching module 11 export circuit of electronic ballast
Alternating current is converted into corresponding DC voltage, and the first of impedance matching module 11 plays detuning work to third capacitor C1~C3
With carrying out clamper pressure limiting by varistor VR1 and varistor VR2, and be filtered to direct current.
In an embodiment, first, second fuse F1, F2 and first, second varistor VR1, VR2 constitute over-voltage and protect
Shield and abnormity protection circuit, it is ensured that input voltage avoids subsequent component from being impacted in confidence band；First, second electricity
Feel L1, L2 and first, second capacitor C1, C2 constitutes impedance matching module, plays the role of that EMI, third capacitor C3 is inhibited to can be used
Low capacity metal membrane capacitance guarantees high PF performance, uses convenient for the sampling of subsequent Power Factor Correction Control chip 13.
In an embodiment, if the loading of LED driving circuit 1 of the invention is equipped with inductance type ballast
In tube stand, four ports of fluorescent tube be it is fixed, starter can not have any operating current to flow through, so always working at
Open-circuit condition, thus in the first, second input terminal AC1 and AC2 of the first rectifier bridge DB1 also only one to be connected to alternating current defeated
Enter, while also only one can be connected to the another of alternating current input in the third of the second rectifier bridge DB2, the 4th input terminal AC3 and AC4
One end can only be formed in this way by any two bridge in the first rectifier bridge DB1 and the second rectifier bridge DB2 to input network voltage
Then full-bridge rectification smoothly enters major loop by third capacitor C3 again.
In another embodiment, if LED driving circuit 1 is packed into the tube stand for being equipped with electric ballast
It is interior, due in the route of the electric ballast bracket with the presence of resonant capacitance, so result in the first to the 4th input terminal AC1~
AC4 can be accessed in circuit, which is in high-frequency work state, and the first rectifier bridge DB1 and the second rectifier bridge DB2 are equal
Using quick high-frequency diode, input rectifying module 10 and impedance matching module 11 combine work to can guarantee the electric ballast
In normal working condition.
In an embodiment, Power Factor Correction Control chip 13 may also include pin SW1, SW2, VG1, LED, CS,
DRV, GND, VIN, COMP and ZCS.
As shown in figure 4, in an embodiment, control system 12 may also include that first switch tube Q1, have first around
Transformer T1, the first to the 7th diode D1~D7, the first to the 9th resistance R1~R9, the 4th of group T1A and the second winding T1B
To the 7th capacitor C4~C7；The cathode of first diode D1 connects SW2 foot；The anode of first diode D1 connects the 4th capacitor
The anode of C4, the second diode D2 and third diode D3；The cathode of second diode D2 connects first winding T1A；4th
The cathode of diode D4 and the 5th diode D5 connect LED foot；The anode connection of 4th diode D4 and the 5th diode D5 is defeated
Rectification module 14 out；The grid of first switch tube Q1 is connected to DRV foot by first resistor R1；One end of second resistance R2 connects
CS foot；The source electrode of the other end connection 3rd resistor R3 and first switch tube Q1 of second resistance R2；The electricity of 4th resistance R4 and the 5th
Hold C5 connection VIN foot；Second winding T1B sequentially passes through the 6th diode D6 and the 5th resistance R5 connection VIN foot；6th resistance R6
One end and the 7th resistance R7 connection ZCS foot；The other end of 6th resistance R6 connects the second winding T1B；8th resistance R8 passes through
6th capacitor C6 connection COMP foot；The anode of the 7th diode D7 of drain electrode connection of first switch tube Q1；And the 7th diode
The cathode of D7 connects the 9th resistance R9 and the 7th capacitor C7.
In an embodiment, if the loading of LED driving circuit 1 is equipped in the tube stand of electric ballast,
Since, with the presence of resonant capacitance, the second inductance L2 is defeated by the second input terminal AC2 and the 4th in the route of electric ballast bracket
Enter to hold the capacitor composition resonant tank built in AC4 and ballast.First winding T1A, the first to the 5th diode D1~D5, the tenth
It is formed to 14 resistance R10~R14 (in the inside of Power Factor Correction Control chip 13, being repeated after appearance), the 4th capacitor C4 high
Frequency switching circuit circuit.4th resistance R4 and the 5th capacitor C5 constitutes the start-up circuit of Power Factor Correction Control chip 13, becomes
The second winding T1B of depressor T1 is that the auxiliary of Power Factor Correction Control chip 13 supplies by the 6th diode D6 and the 5th resistance R5
Electricity, in addition, passing through ZCS of the bleeder circuit to Power Factor Correction Control chip 13 of the 6th resistance R6 and the 7th resistance R7 composition
Foot carries out voltage sample detection.Second resistance R2,3rd resistor R3 are that Power Factor Correction Control chip 13 carries out current detecting,
Control entire loop work state.Electric current can be exported by changing the resistance value flexible modulation of 3rd resistor R3.First switch tube Q1
It is then driven to carry out HF switch switching by first resistor R1 by the DRV foot of Power Factor Correction Control chip 13.7th
Diode D7, the 9th resistance R9, the 7th capacitor C7 constitute RCD buffer circuit, absorb leakage inductance energy, it is therefore an objective to reduce metal-oxide-semiconductor pass
Disconnected transient voltage spike.8th resistance R8 and the 6th capacitor C6 is used for compensation network.
Referring to Fig. 5, Fig. 5 is the internal circuit configuration diagram of Power Factor Correction Control chip of the invention.Such as Fig. 5
Shown, the inside of Power Factor Correction Control chip 13 may also include that second switch Q2 and third switching tube Q3, the one or three pole
Pipe Q ' 1, the ten to ten four resistance R10~R14, the first clamper tube D ' 1 and the second clamper tube D ' 2, reference signal Vref, power supply electricity
Road 137, detection circuit 136, feed circuit 130, error amplifier 131, turn-on time generation circuit 132, frequency are adaptively electric
Road 133, logic circuit 134 and driving circuit 135；SW1 foot connects the first clamper tube D ' 1, one end of the tenth resistance R10 and the
The drain electrode of two switching tube Q2；The grid of the other end connection eleventh resistor R11 and third switching tube Q3 of tenth resistance R10；SW2
The drain electrode of foot connection third switching tube Q3；The grid and the second clamper tube D ' 2 of VG1 foot connection second switch Q1；The connection of LED foot
The collector of first triode Q ' 1；The emitter-base bandgap grading of first triode Q ' 1 sequentially connects twelfth resistor R12 and thirteenth resistor R13；
The 14th resistance R14 is connected between the emitter-base bandgap grading and base stage of first triode R ' 1；The CS foot connects feed circuit 130；Feed circuit
130 and reference signal Vref connection error amplifier 131 input terminal；The output end of error amplifier 131 connects turn-on time
Generation circuit 132 and frequency adaptive circuit 133；Turn-on time generation circuit 132 and frequency adaptive circuit 133 connect logic
Circuit 134；The input terminal of the connection driving circuit 135 of logic circuit 134；The output end of driving circuit 135 connects DRV foot；ZCS connects
Connect detection circuit 136；Detection circuit 136 connects logic circuit 134；And VIN foot connects power circuit 137.
In an embodiment, power circuit 137 according to the voltage of VIN carry out power management work, including under-voltage protection, on
Reset, offer internal low-voltage power supply, offer reference signal Vref etc..Detection circuit 136 samples the partial pressure letter of the second winding T1B
Number (ZCS foot voltage) carries out demagnetization detection, and the work of control logic circuit 134.Feed circuit 130 receives third switching tube Q3
CS signal, and with internal reference signal Vref carry out error amplification, 131 output error amplified signal of error amplifier is extremely
COMP.In turn-on time generation circuit 132, turn-on time is generated by the error amplification signal of COMP, with control logic electricity
Road 134, and driving circuit 135 is enabled to export reasonable driving pulsewidth driving first switch tube Q1 high frequency switching.Frequency is adaptively electric
Road 133 generates corresponding frequency by the error amplification signal of COMP, with control logic circuit 134, and driving circuit 135 is enabled to export
Reasonable driving frequency driving first switch tube Q1 high frequency switching.Tenth resistance R10 and eleventh resistor R11 composition partial pressure net
Network samples the source-drain voltage of second switch Q2, and control third switching tube Q3's is switched on or off, and rectifies back to control output
Road.
As shown in figure 4, exporting rectification module 14 can include: the 15th resistance R15 and the 16th resistance in an embodiment
R16, the 8th diode D8, the 8th capacitor C8, the second triode Q ' 2, the first output end LED1 and second output terminal LED2；The
The emitter-base bandgap grading of two triode D ' 2 connect the 15th resistance R15 with collection interpolar；Is connected between the emitter-base bandgap grading and base stage of second triode D ' 2
Three diode D3；The base stage of second triode Q ' 2 passes through the 8th diode D8, the 8th capacitor C8 and the 16th resistance in parallel
R16 is connected to the first output end LED1 and control system 12；And second the collector of triode Q ' 2 be connected to the second output
Hold LED2 and control system 12.
In an embodiment, the first triode Q ' 1, third switching tube Q3 and the first winding T1A, the first to the 5th diode
D1~D5, the ten to ten four resistance R10~R14, the 4th capacitor C4 and the second triode Q ' 2 composition high frequency switching circuit electricity
Road.
The signal processing method of LED driving circuit 1 of the invention, includes the following steps, will come from electronic ballast
The AC power source of device circuit is connected to the input rectifying module 10 of LED driving circuit 1 above-mentioned, through input rectifying
The alternating current of input is converted into direct current by module 10；The resistance of matching input rectifying module 10 is provided through impedance matching module 11
Resist and inhibits electromagnetic interference；The direct current is adjusted through control system 12 and Power Factor Correction Control chip 13
The output electric current of whole and output-controlled system；And through output rectification module 14 the output electric current is rectified and export to
External light-emitting circuit 2.
Compared to technology is noted, due to LED driving circuit and signal processing method of the invention, function has been used
Rate factor correcting controls chip, and Closed-loop Constant-current and PFC correction can be accurately controlled by Power Factor Correction Control chip, therefore is had
The high constant current accuracy of single- stage PFC control；In addition to this, direct current, impedance are also converted alternating current to input rectifying module
Be used to provide the impedance matching of the input rectifying module with module and inhibit electromagnetic interference, with control system and power because
Number correcting controlling chip is adjusted to the direct current and the output electric current of output-controlled system, and output rectification module is used for
The output electric current is rectified and is exported to external light-emitting circuit, by this method by the exchange of circuit of electronic ballast
Electricity is converted to direct current, and adjusts and make it suitable for driving the external light-emitting circuit, therefore energy compatible electronic ballast circuit,
Greatly improve the disadvantages of the prior art.
By the description of the above preferred embodiment, one skilled in the art is of the invention when can more understand
Feature and spirit, only above-described embodiment only illustrates the principle of the present invention and its effect, rather than to limit the present invention.Therefore,
The modification and change without departing from spirit of the invention, and interest field Ying Ruquan of the invention that any pair of above-described embodiment carries out
Listed by benefit requires.
Claims (7)
1. a kind of LED driving circuit characterized by comprising
Input rectifying module, for the alternating current of input to be converted into direct current；
Impedance matching module, for providing the impedance matching of the input rectifying module and inhibiting electromagnetic interference；
Control system and Power Factor Correction Control chip connect with the impedance matching module and the input rectifying module
It connects, for being adjusted to the direct current and the output electric current of output-controlled system；And
Rectification module is exported, for being rectified and being exported to external light-emitting circuit to the output electric current,
Wherein, which further includes pin SW1, SW2, VG1, LED, CS, DRV, GND, VIN, COMP
And ZCS, the control system further include: first switch tube, the transformer with the first winding and the second winding, first arrive
7th diode, the first to the 9th resistance, the 4th and the 5th capacitor；Wherein, the cathode of the first diode connects SW2 foot；It should
The anode of first diode connects the anode of the 4th capacitor, the second diode and third diode；The yin of second diode
Pole connects first winding；The cathode of 4th diode and the 5th diode connects LED foot；4th diode and the five or two
The anode of pole pipe connects the output rectification module；The grid of the first switch tube is connected to DRV foot by the first resistor；This
One end of two resistance connects CS foot；The other end of the second resistance connects the 3rd resistor and the source electrode of the first switch tube；It should
4th resistance and the 5th capacitance connection VIN foot；Second winding sequentially passes through the 6th diode and the 5th resistance connection VIN
Foot；One end of 6th resistance and the 7th resistance connect ZCS foot；The other end of 6th resistance connects second winding；This
Eight resistance pass through the 6th capacitance connection COMP foot；
The anode of drain electrode the 7th diode of connection of the first switch tube；And the 7th the cathode of diode connect the 9th
Resistance and the 7th capacitor.
2. LED driving circuit as described in claim 1, which is characterized in that the input rectifying module further include: by
First rectifier bridge and the second rectifier bridge composed by high-frequency diode；First and second input being connect with first rectifier bridge
End；
And the third being connect with second rectifier bridge and the 4th input terminal.
3. LED driving circuit as claimed in claim 2, which is characterized in that the input rectifying module further include: simultaneously
The first varistor being coupled between first and second input terminal；The second pressure being parallel between the third and the 4th input terminal
Quick resistance；The first fuse being series between the first input end and first rectifier bridge；And it is series at second input
The second fuse between end and first rectifier bridge.
4. LED driving circuit as claimed in claim 3, which is characterized in that the impedance matching module further include: simultaneously
The first capacitor being coupled between first and second input terminal；The second capacitor being parallel between the third and the 4th input terminal；
The first inductance being series between first fuse and first rectifier bridge；It is parallel between first and second rectifier bridge
Second inductance；And the third capacitor being connect with first and second rectifier bridge.
5. LED driving circuit as described in claim 1, which is characterized in that the Power Factor Correction Control chip
It is internal further include: second and third switching tube, the first triode, the ten to ten four resistance, first and second clamper tube, benchmark letter
Number, power circuit, detection circuit, feed circuit, error amplifier, turn-on time generation circuit, frequency adaptive circuit, logic
Circuit and driving circuit；SW1 foot connects the drain electrode of first clamper tube, one end of the tenth resistance and the second switch；
The other end of tenth resistance connects the grid of the eleventh resistor and the third switching tube；SW2 foot connects the third switching tube
Drain electrode；VG1 foot connects the grid and the second clamper tube of the second switch；LED foot connects the collector of first triode；It should
The emitter-base bandgap grading of first triode sequentially connects the twelfth resistor and thirteenth resistor；Connect between the emitter-base bandgap grading and base stage of first triode
Connect the 14th resistance；The CS foot connects the feed circuit；The feed circuit and the reference signal connect the error amplifier
Input terminal；The output end of the error amplifier connects the turn-on time generation circuit and the frequency adaptive circuit；When the conducting
Between generation circuit with the frequency adaptive circuit connect the logic circuit；The logic circuit connects the input terminal of the driving circuit；
The output end of the driving circuit connects DRV foot；ZCS connects the detection circuit；The detection circuit connects the logic circuit；And
VIN foot connects the power circuit.
6. LED driving circuit as described in claim 1, which is characterized in that the output rectification module includes: the tenth
Five and the 16th resistance, the 8th diode, the 8th capacitor, the second triode, first and second output end；Second triode
Emitter-base bandgap grading connect the 15th resistance with collection interpolar；Third diode is connected between the emitter-base bandgap grading and base stage of second triode；This second
The base stage of triode is connected to first output end by the 8th diode, the 8th capacitor and the 16th resistance in parallel and should
Control system；And the collector of second triode is connected to the second output terminal and the control system.
7. a kind of signal processing method of LED driving circuit characterized by comprising
AC power source from circuit of electronic ballast is connected to input rectifying module；
The alternating current of input is converted into direct current through the input rectifying module；
It is provided through impedance matching module and matches the impedance of the input rectifying module and inhibit electromagnetic interference；
The direct current is adjusted through control system and Power Factor Correction Control chip and output-controlled system
Output electric current, wherein the Power Factor Correction Control chip include pin SW1, SW2, VG1, LED, CS, DRV, GND, VIN,
COMP and ZCS, the control system further include: first switch tube, the transformer with the first winding and the second winding,
One to the 7th diode, the first to the 9th resistance, the 4th and the 5th capacitor；Wherein, the cathode of the first diode connects SW2
Foot；The anode of the first diode connects the anode of the 4th capacitor, the second diode and third diode；Second diode
Cathode connect first winding；The cathode of 4th diode and the 5th diode connects LED foot；4th diode and
The anode of five diodes connects the output rectification module；The grid of the first switch tube is connected to DRV foot by the first resistor；
One end of the second resistance connects CS foot；The other end of the second resistance connects the 3rd resistor and the source of the first switch tube
Pole；4th resistance and the 5th capacitance connection VIN foot；Second winding sequentially passes through the 6th diode and the connection of the 5th resistance
VIN foot；One end of 6th resistance and the 7th resistance connect ZCS foot；The other end of 6th resistance connects second winding；It should
8th resistance passes through the 6th capacitance connection COMP foot；The anode of drain electrode the 7th diode of connection of the first switch tube；With
And the 7th the cathode of diode connect the 9th resistance and the 7th capacitor；And
The output electric current is rectified through output rectification module and is exported to external light-emitting circuit.
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| CN201510481788.7A CN106714399B (en) | 2015-08-07 | 2015-08-07 | LED driving circuit and signal processing method |
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| CN201510481788.7A CN106714399B (en) | 2015-08-07 | 2015-08-07 | LED driving circuit and signal processing method |
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| CN106714399B true CN106714399B (en) | 2019-06-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101686587A (en) * | 2008-09-25 | 2010-03-31 | 皇家飞利浦电子股份有限公司 | Drive for providing variable power for LED array |
| CN103037582A (en) * | 2012-12-18 | 2013-04-10 | 东莞市领冠半导体照明有限公司 | Light-emitted diode (LED) daylight lamp power source compatible with fluorescent lamp system |
| CN203136235U (en) * | 2012-12-18 | 2013-08-14 | 东莞市领冠半导体照明有限公司 | Compatible fluorescent lamp type LED fluorescent lamp power supply |
| CN205040055U (en) * | 2015-08-07 | 2016-02-17 | 帝奥微电子有限公司 | Light -emitting diode driving circuit |
Family Cites Families (2)
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| US8344638B2 (en) * | 2008-07-29 | 2013-01-01 | Point Somee Limited Liability Company | Apparatus, system and method for cascaded power conversion |
| CN204482092U (en) * | 2015-03-23 | 2015-07-15 | 深圳市稳先微电子有限公司 | A kind of non-isolated voltage-dropping type LED drive circuit of intelligent synchronization rectification |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101686587A (en) * | 2008-09-25 | 2010-03-31 | 皇家飞利浦电子股份有限公司 | Drive for providing variable power for LED array |
| CN103037582A (en) * | 2012-12-18 | 2013-04-10 | 东莞市领冠半导体照明有限公司 | Light-emitted diode (LED) daylight lamp power source compatible with fluorescent lamp system |
| CN203136235U (en) * | 2012-12-18 | 2013-08-14 | 东莞市领冠半导体照明有限公司 | Compatible fluorescent lamp type LED fluorescent lamp power supply |
| CN205040055U (en) * | 2015-08-07 | 2016-02-17 | 帝奥微电子有限公司 | Light -emitting diode driving circuit |
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