CN106163068A - Electronic ballast for fluoresent lamp protection circuit - Google Patents
Electronic ballast for fluoresent lamp protection circuit Download PDFInfo
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- CN106163068A CN106163068A CN201510228909.7A CN201510228909A CN106163068A CN 106163068 A CN106163068 A CN 106163068A CN 201510228909 A CN201510228909 A CN 201510228909A CN 106163068 A CN106163068 A CN 106163068A
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Abstract
A kind of electronic ballast for fluoresent lamp protection circuit.It makees electric ballast Working state checking circuit with two audions, with an electric capacity time delay, triggers circuit, two audion outputs with two audion compositions.When detecting that electric ballast works in current state, through electric capacity time delay, then trigger circuit, output protection signal.Electric ballast failure of oscillation, protection electric ballast is no longer operated under current state.Do so low cost not to the utmost, and reliability is high.
Description
Technical field
The present invention relates to the protection circuit of a kind of electronic ballast for fluoresent lamp, particularly
Electronic ballast for fluoresent lamp protection circuit.
Background technology
The sample circuit of existing electronic ballast for fluoresent lamp protection circuit has two kinds,
One is with a transformator, is used in the output circuit of electric ballast, by defeated
The voltage gone out becomes sampling voltage, and do so to use a transformator, and cost is non-
Chang Gao.Another kind is to connect dividing potential drop between inductance output and the ground of electric ballast
Resistance, charges to electric capacity with after diode rectification, then exports with diac,
Owing to diac is easily damaged in practical process, so its reliability is subject to
To impact.
Summary of the invention
It is an object of the invention to the deficiency overcome in prior art, and provide a kind of glimmering
Light modulation electronic ballast protecting circuit, in this circuit, with two audions to letter
Number detect, with an electric capacity time delay, trigger circuit with two audions compositions,
Protection signal output made by two audions, protects fluorescent lamp electronic ballast after dying of old age
Device is no longer operated under big electric current and high voltage.
The technical scheme is that electronic ballast for fluoresent lamp protection circuit has one
Individual bridge rectifier D1, electric capacity C8, C9 are composed in series filter circuit, transformation
Device L1, inductance L2, audion Q7, Q8, electric capacity C4, C5, C6, C7, two
Pole pipe D4, D5, D6, resistance R20, R21, R22, R23, R24, R25,
R26, R27 form circuit of electronic ballast.Audion Q7 colelctor electrode connecting resistance R19,
R19 another termination positive supply VCC, resistance R17, R18 connect audion Q6 base stage,
R17 another termination Q7 colelctor electrode of another termination positive supply VCC, R18, Q6 launches
Pole meets positive supply VCC, and Q6 collector series resistance R13 connects electric capacity C3 positive pole,
Diode D3 positive pole connects audion Q8 colelctor electrode, and D3 negative pole meets audion Q5 and sends out
Emitter-base bandgap grading, resistance R16 meets D3 negative pole and positive supply VCC, resistance R14, R15 respectively
Connect Q5 base stage, another termination D3 negative pole of R14, R15 another termination positive supply VCC,
Q5 collector series resistance R12 connects electric capacity C3 positive pole, C3 minus earth, resistance
R1 connects positive supply VCC and light emitting diode D2 positive pole respectively, and resistance R2 connects respectively
The positive pole of D2 and negative pole, electric capacity C1 positive pole connects D2 negative pole, C1 minus earth,
Resistance R3 connects D2 negative pole and ground respectively, and resistance R4 connects audion Q1 base stage respectively
And emitter stage, Q1 emitter stage connects D2 negative pole, and electric capacity C2 connects Q1 colelctor electrode respectively
And ground, resistance R6 meets Q1 colelctor electrode and audion Q2 base stage, resistance R9 respectively
Connecing base stage and the emitter stage of Q2 respectively, Q2 collector series resistance R5 connects Q1 base
Pole, resistance R11 connects Q2 base stage and C3 positive pole respectively, and Q2 emitter stage connects audion
Q4 base stage, Q4 grounded emitter, resistance R10 meets Q4 base stage and ground, Q4 respectively
Collector connecting transistor Q8 base stage, resistance R7, R8 connect audion Q3 base stage,
Another termination Q1 colelctor electrode of R7, R8 other end ground connection, Q3 grounded emitter, Q3
Collector connecting transistor Q8 base stage.
The further technical scheme of the present invention is: resistance R7, audion Q3 open circuit,
Resistance R19 short circuit, resistance R13 open circuit.
The further technical scheme of the present invention is: resistance R7, R12, audion Q3,
Diode D3 open circuit.
The further technical scheme of the present invention is: resistance R10, R19 short circuit, three poles
Pipe Q4, resistance R13 open circuit.
The further technical scheme of the present invention is: resistance R10 short circuit, diode D3,
Audion Q4, resistance R12 open circuit.
When fluorescent lamp normally works, electric ballast operating current is less, resistance
Voltage on R16, R19 is the lowest, and audion Q5, Q6 do not have electric current to export, and three
Pole pipe Q1, Q2 do not trigger work, and Q3, Q4 end, and protection circuit is unprotected
Signal exports, and electric ballast normally works.After fluorescent lamp is died of old age, electronics town
Stream device operating current is the biggest, and the voltage on resistance R16, R19 is the highest, Q5,
Q6 exports electric current, and Q1, Q2 trigger work, and Q3, Q4 turn on, and protection circuit is defeated
Going out and protect signal, electric ballast failure of oscillation does not works, and light emitting diode D2 is luminous
It is designated as fluorescent lamp to die of old age state.
Due to the fact that and have employed as above circuit structure, novel in design, cost is lower,
Reliability greatly improves, and has state instruction of dying of old age, workable, uses more square
Just.
Below in conjunction with the drawings and specific embodiments, the detailed circuit of the present invention is made
Further describe.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of electronic ballast for fluoresent lamp protection circuit.
Fig. 2 is that the first embodiment circuit of electronic ballast for fluoresent lamp protection circuit is former
Reason figure.
Fig. 3 is that the second embodiment circuit of electronic ballast for fluoresent lamp protection circuit is former
Reason figure.
Fig. 4 is that the 3rd embodiment circuit of electronic ballast for fluoresent lamp protection circuit is former
Reason figure.
Fig. 5 is that the 4th embodiment circuit of electronic ballast for fluoresent lamp protection circuit is former
Reason figure.
Detailed description of the invention
In Fig. 1, there are a bridge rectifier D1, electric capacity C8, C9 series connection group
Become filter circuit, transformator L1, inductance L2, audion Q7, Q8, electric capacity C4,
C5, C6, C7, diode D4, D5, D6, resistance R20, R21, R22, R23,
R24, R25, R26, R27 form circuit of electronic ballast.Audion Q7 current collection
Pole connecting resistance R19, R19 another termination positive supply VCC, resistance R17, R18 connect
Audion Q6 base stage, R17 another termination positive supply VCC, R18 another termination Q7
Colelctor electrode, Q6 emitter stage meets positive supply VCC, and Q6 collector series resistance R13 connects
Electric capacity C3 positive pole, diode D3 positive pole connects audion Q8 colelctor electrode, D3 negative pole
Connecing audion Q5 emitter stage, resistance R16 meets D3 negative pole and positive supply VCC respectively,
Resistance R14, R15 connect Q5 base stage, R14 another termination D3 negative pole, R15 another
Termination positive supply VCC, Q5 collector series resistance R12 connects electric capacity C3 positive pole,
C3 minus earth, resistance R1 is just meeting positive supply VCC and light emitting diode D2 respectively
Pole, resistance R2 connects positive pole and the negative pole of D2 respectively, and electric capacity C1 positive pole meets D2 and bears
Pole, C1 minus earth, resistance R3 connects D2 negative pole and ground respectively, and resistance R4 divides
Not connecing audion Q1 base stage and emitter stage, Q1 emitter stage connects D2 negative pole, electric capacity
C2 connects Q1 colelctor electrode and ground respectively, and resistance R6 connects Q1 colelctor electrode and three poles respectively
Pipe Q2 base stage, resistance R9 connects base stage and the emitter stage of Q2, Q2 colelctor electrode respectively
Series resistance R5 connects Q1 base stage, and resistance R11 connects Q2 base stage and C3 positive pole respectively,
Q2 emitter stage connects audion Q4 base stage, Q4 grounded emitter, and resistance R10 is respectively
Meet Q4 base stage and ground, Q4 collector connecting transistor Q8 base stage, resistance R7, R8
Connect audion Q3 base stage, another termination Q1 colelctor electrode of R7, R8 other end ground connection,
Q3 grounded emitter, Q3 collector connecting transistor Q8 base stage.
Its work process is as follows: before electric ballast and protection circuit are energized,
Voltage on electric capacity C1, C2, C3 is zero, after energising, the voltage of electric capacity C1 with
Certain speed rises to positive supply VCC value, and the voltage on C2, C3 continues as zero,
There is no voltage difference between audion Q1, Q2 base stage and emitter stage, be in cut-off shape
State.
When fluorescent lamp normally works, the operating current of electric ballast is less, electricity
Voltage on resistance R16 is relatively low, and the voltage after resistance R14, R15 dividing potential drop is less than three
The conducting voltage of pole pipe Q5, Q5 does not has electric current to export, the voltage on resistance R19
Relatively low, voltage after resistance R18, R17 dividing potential drop electric conduction less than audion Q6
Pressure, Q6 does not has electric current to export, and Q1, Q2 are not triggered, and Q3, Q4 end, and protects
The unprotected signal of protection circuit exports, and electric ballast normally works.
After fluorescent lamp is died of old age, electric ballast operating current is relatively big, resistance R16
On voltage of a relatively high, the conducting higher than Q5 of voltage after R14, R15 dividing potential drop
Voltage, Q5 exports electric current, and the voltage on resistance R19 is of a relatively high, R18, R17
The voltage after the dividing potential drop conducting voltage higher than Q6, Q6 exports electric current, through electric capacity C3
After charging, triggering Q1, Q2 conducting, Q3, Q4 turn on, and protection circuit output is protected
Protecting signal, Q8 ends, electric ballast failure of oscillation, and D2 luminescence is designated as protecting shape
State.
When electric ballast is in startup, electric ballast works in big electric current shape
State, the voltage on R16 is of a relatively high, and Q5 exports electric current, the voltage phase on R19
To higher, Q6 exports electric current, and C3 charges.After starting, electric ballast
Operating current reduces, and the voltage on R16 declines, and Q5 does not export electric current, R19
On voltage decline, Q6 does not export electric current, and the startup time of electric ballast
Shorter, C3 charging is not reaching to the trigger voltage of Q1, Q2 and just have dropped, Q1,
Q2 is not triggered, and the unprotected signal of Q3, Q4 exports.Therefore protection circuit exists
Not output protection signal during startup, electric ballast normally works.
In Fig. 2, there are a bridge rectifier D1, electric capacity C8, C9 series connection group
Become filter circuit, transformator L1, inductance L2, audion Q7, Q8, electric capacity C4,
C5, C6, C7, diode D4, D5, D6, resistance R20, R21, R22, R23,
R24, R25, R26, R27 form circuit of electronic ballast.Audion Q7 current collection
Pole meets positive supply VCC, and diode D3 positive pole connects audion Q8 colelctor electrode, and D3 bears
Pole connects audion Q5 emitter stage, and resistance R16 meets D3 negative pole and positive supply VCC respectively,
Resistance R14, R15 connect Q5 base stage, R14 another termination D3 negative pole, R15 another
Termination positive supply VCC, Q5 collector series resistance R12 connects electric capacity C3 positive pole,
C3 minus earth, resistance R1 is just meeting positive supply VCC and light emitting diode D2 respectively
Pole, resistance R2 connects positive pole and the negative pole of D2 respectively, and electric capacity C1 positive pole meets D2 and bears
Pole, C1 minus earth, resistance R3 connects D2 negative pole and ground respectively, and resistance R4 divides
Not connecing audion Q1 base stage and emitter stage, Q1 emitter stage connects D2 negative pole, electric capacity
C2 connects Q1 colelctor electrode and ground respectively, and resistance R6 connects Q1 colelctor electrode and three poles respectively
Pipe Q2 base stage, resistance R9 connects base stage and the emitter stage of Q2, Q2 colelctor electrode respectively
Series resistance R5 connects Q1 base stage, and resistance R11 connects Q2 base stage and C3 positive pole respectively,
Q2 emitter stage connects audion Q4 base stage, Q4 grounded emitter, and resistance R10 is respectively
Connect Q4 base stage and ground, Q4 collector connecting transistor Q8 base stage.
Its work process is as follows: when fluorescent lamp normally works, electric ballast
Operating current less, the voltage on resistance R16 is relatively low, resistance R14, R15
The voltage after the dividing potential drop conducting voltage less than audion Q5, Q5 does not has electric current to export,
Q1, Q2 are not triggered, and Q4 ends, and the unprotected signal of protection circuit exports,
Electric ballast normally works.
After fluorescent lamp is died of old age, electric ballast operating current is relatively big, resistance R16
On voltage of a relatively high, the conducting higher than Q5 of voltage after R14, R15 dividing potential drop
Voltage, Q5 exports electric current, after electric capacity C3 charges, triggers Q1, Q2 conducting,
Q4 turns on, protection circuit output protection signal, and Q8 ends, and electric ballast stops
Shaking, D2 luminescence is designated as guard mode.
When electric ballast is in startup, electric ballast works in big electric current shape
State, the voltage on R16 is of a relatively high, and Q5 exports electric current, and C3 charges.Due to
After startup, electric ballast operating current reduces, and the voltage on R16 declines, Q5
Not exporting electric current, and the startup time of electric ballast is shorter, C3 charging does not has
The trigger voltage reaching Q1, Q2 just have dropped, and Q1, Q2 are not triggered, Q4
Unprotected signal exports.Therefore protection circuit the most not output protection letter
Number, electric ballast normally works.
In Fig. 3, there are a bridge rectifier D1, electric capacity C8, C9 series connection group
Become filter circuit, transformator L1, inductance L2, audion Q7, Q8, electric capacity C4,
C5, C6, C7, diode D4, D5, D6, resistance R20, R21, R22, R23,
R24, R25, R26, R27 form circuit of electronic ballast.Audion Q7 current collection
Pole connecting resistance R19, R19 another termination positive supply VCC, resistance R17, R18 connect
Audion Q6 base stage, R17 another termination positive supply VCC, R18 another termination Q7
Colelctor electrode, Q6 emitter stage meets positive supply VCC, and Q6 collector series resistance R13 connects
Electric capacity C3 positive pole, C3 minus earth, resistance R1 connect respectively positive supply VCC and
Light emitting diode D2 positive pole, resistance R2 connects positive pole and the negative pole of D2 respectively, electricity
Holding C1 positive pole and connect D2 negative pole, C1 minus earth, resistance R3 connects D2 negative pole respectively
And ground, resistance R4 connects audion Q1 base stage and emitter stage respectively, and Q1 emitter stage connects
D2 negative pole, electric capacity C2 connects Q1 colelctor electrode and ground respectively, and resistance R6 meets Q1 respectively
Colelctor electrode and audion Q2 base stage, resistance R9 connects base stage and the transmitting of Q2 respectively
Pole, Q2 collector series resistance R5 connects Q1 base stage, and resistance R11 meets Q2 respectively
Base stage and C3 positive pole, Q2 emitter stage connects audion Q4 base stage, and Q4 emitter stage connects
Ground, resistance R10 connects Q4 base stage and ground, Q4 collector connecting transistor Q8 base respectively
Pole.
Its work process is as follows: when fluorescent lamp normally works, electric ballast
Operating current less, the voltage on resistance R19 is relatively low, resistance R18, R17
The voltage after the dividing potential drop conducting voltage less than audion Q6, Q6 does not has electric current to export,
Q1, Q2 are not triggered, and Q4 ends, and the unprotected signal of protection circuit exports,
Electric ballast normally works.
After fluorescent lamp is died of old age, electric ballast operating current is relatively big, resistance R19
On voltage of a relatively high, the conducting higher than Q6 of voltage after R18, R17 dividing potential drop
Voltage, Q6 exports electric current, after electric capacity C3 charges, triggers Q1, Q2 conducting,
Q4 turns on, protection circuit output protection signal, and Q8 ends, and electric ballast stops
Shaking, D2 luminescence is designated as guard mode.
When electric ballast is in startup, electric ballast works in big electric current shape
State, the voltage on R19 is of a relatively high, and Q6 exports electric current, and C3 charges.Due to
After startup, electric ballast operating current reduces, and the voltage on R19 declines, Q6
Not exporting electric current, and the startup time of electric ballast is shorter, C3 charging does not has
The trigger voltage reaching Q1, Q2 just have dropped, and Q1, Q2 are not triggered, and Q4 does not has
Protected signal exports.Therefore protection circuit the most not output protection signal,
Electric ballast normally works.
In Fig. 4, there are a bridge rectifier D1, electric capacity C8, C9 series connection group
Become filter circuit, transformator L1, inductance L2, audion Q7, Q8, electric capacity C4,
C5, C6, C7, diode D4, D5, D6, resistance R20, R21, R22, R23,
R24, R25, R26, R27 form circuit of electronic ballast.Audion Q7 current collection
Pole meets positive supply VCC, and diode D3 positive pole connects audion Q8 colelctor electrode, and D3 bears
Pole connects audion Q5 emitter stage, and resistance R16 meets D3 negative pole and positive supply VCC respectively,
Resistance R14, R15 connect Q5 base stage, R14 another termination D3 negative pole, R15 another
Termination positive supply VCC, Q5 collector series resistance R12 connects electric capacity C3 positive pole,
C3 minus earth, resistance R1 is just meeting positive supply VCC and light emitting diode D2 respectively
Pole, resistance R2 connects positive pole and the negative pole of D2 respectively, and electric capacity C1 positive pole meets D2 and bears
Pole, C1 minus earth, resistance R3 connects D2 negative pole and ground respectively, and resistance R4 divides
Not connecing audion Q1 base stage and emitter stage, Q1 emitter stage connects D2 negative pole, electric capacity
C2 connects Q1 colelctor electrode and ground respectively, and resistance R6 connects Q1 colelctor electrode and three poles respectively
Pipe Q2 base stage, resistance R9 connects base stage and the emitter stage of Q2, Q2 colelctor electrode respectively
Series resistance R5 connects Q1 base stage, and resistance R11 connects Q2 base stage and C3 positive pole respectively,
Q2 grounded emitter, resistance R7, R8 connect audion Q3 base stage, the R7 other end
Connecing Q1 colelctor electrode, R8 other end ground connection, Q3 grounded emitter, Q3 colelctor electrode connects
Audion Q8 base stage.
Its work process is as follows: when fluorescent lamp normally works, electric ballast
Operating current less, the voltage on resistance R16 is relatively low, resistance R14, R15
The voltage after the dividing potential drop conducting voltage less than audion Q5, Q5 does not has electric current to export,
Q1, Q2 are not triggered, and Q3 ends, and the unprotected signal of protection circuit exports,
Electric ballast normally works.
After fluorescent lamp is died of old age, electric ballast operating current is relatively big, resistance R16
On voltage of a relatively high, the conducting higher than Q5 of voltage after R14, R15 dividing potential drop
Voltage, Q5 exports electric current, after electric capacity C3 charges, triggers Q1, Q2 conducting,
Q3 turns on, protection circuit output protection signal, and Q8 ends, and electric ballast stops
Shaking, D2 luminescence is designated as guard mode.
When electric ballast is in startup, electric ballast works in big electric current shape
State, the voltage on R16 is of a relatively high, and Q5 exports electric current, and C3 charges.Due to
After startup, electric ballast operating current reduces, and the voltage on R16 declines, Q5
Not exporting electric current, and the startup time of electric ballast is shorter, C3 charging does not has
The trigger voltage reaching Q1, Q2 just have dropped, and Q1, Q2 are not triggered, and Q3 does not has
Protected signal exports.Therefore protection circuit the most not output protection signal,
Electric ballast normally works.
In Fig. 5, there are a bridge rectifier D1, electric capacity C8, C9 series connection group
Become filter circuit, transformator L1, inductance L2, audion Q7, Q8, electric capacity C4,
C5, C6, C7, diode D4, D5, D6, resistance R20, R21, R22, R23,
R24, R25, R26, R27 form circuit of electronic ballast.Audion Q7 current collection
Pole connecting resistance R19, R19 another termination positive supply VCC, resistance R17, R18 connect
Audion Q6 base stage, R17 another termination positive supply VCC, R18 another termination Q7
Colelctor electrode, Q6 emitter stage meets positive supply VCC, and Q6 collector series resistance R13 connects
Electric capacity C3 positive pole, C3 minus earth, resistance R1 meets positive supply VCC respectively and sends out
Optical diode D2 positive pole, resistance R2 connects positive pole and the negative pole of D2, electric capacity respectively
C1 positive pole connects D2 negative pole, C1 minus earth, resistance R3 connect respectively D2 negative pole and
Ground, resistance R4 connects audion Q1 base stage and emitter stage respectively, and Q1 emitter stage connects
D2 negative pole, electric capacity C2 connects Q1 colelctor electrode and ground respectively, and resistance R6 meets Q1 respectively
Colelctor electrode and audion Q2 base stage, resistance R9 connects base stage and the transmitting of Q2 respectively
Pole, Q2 collector series resistance R5 connects Q1 base stage, and resistance R11 meets Q2 respectively
Base stage and C3 positive pole, Q2 grounded emitter, resistance R7, R8 meet audion Q3
Base stage, another termination Q1 colelctor electrode of R7, R8 other end ground connection, Q3 emitter stage connects
Ground, Q3 collector connecting transistor Q8 base stage.
Its work process is as follows: when fluorescent lamp normally works, electric ballast
Operating current less, the voltage on resistance R19 is relatively low, resistance R18, R17
The voltage after the dividing potential drop conducting voltage less than audion Q6, Q6 does not has electric current to export,
Q1, Q2 are not triggered, and Q3 ends, and the unprotected signal of protection circuit exports,
Electric ballast normally works.
After fluorescent lamp is died of old age, electric ballast operating current is relatively big, resistance R19
On voltage of a relatively high, the conducting higher than Q6 of voltage after R18, R17 dividing potential drop
Voltage, Q6 exports electric current, after electric capacity C3 charges, triggers Q1, Q2 conducting,
Q3 turns on, protection circuit output protection signal, and Q8 ends, and electric ballast stops
Shaking, D2 luminescence is designated as guard mode.
When electric ballast is in startup, electric ballast works in big electric current shape
State, the voltage on R19 is of a relatively high, and Q6 exports electric current, and C3 charges.Owing to opening
After Dong, electric ballast operating current reduces, and the voltage on R19 declines, and Q6 does not has
Having output electric current, and the startup time of electric ballast is shorter, C3 charging does not reach
Trigger voltage to Q1, Q2 just have dropped, and Q1, Q2 are not triggered, and Q3 does not has
Protection signal output.Therefore protection circuit the most not output protection signal, electricity
Sub-ballast normally works.
Claims (5)
1. electronic ballast for fluoresent lamp protection circuit has a bridge rectifier D1,
Electric capacity C8, C9 are composed in series filter circuit, transformator L1, inductance L2, three poles
Pipe Q7, Q8, electric capacity C4, C5, C6, C7, diode D4, D5, D6, electricity
Resistance R20, R21, R22, R23, R24, R25, R26, R27 form electronics town
Stream device circuit, is characterized in that: audion Q7 colelctor electrode connecting resistance R19, R19 is another
One termination positive supply VCC, resistance R17, R18 meet audion Q6 base stage, R17
Another terminates another termination Q7 colelctor electrode of positive supply VCC, R18, and Q6 emitter stage connects
Positive supply VCC, Q6 collector series resistance R13 connects electric capacity C3 positive pole, two poles
Pipe D3 positive pole connects audion Q8 colelctor electrode, and D3 negative pole connects audion Q5 emitter stage,
Resistance R16 meets D3 negative pole and positive supply VCC respectively, and resistance R14, R15 meet Q5
Base stage, another termination D3 negative pole of R14, R15 another termination positive supply VCC, Q5
Collector series resistance R12 meets electric capacity C3 positive pole, C3 minus earth, resistance R1
Connecing positive supply VCC and light emitting diode D2 positive pole respectively, resistance R2 meets D2 respectively
Positive pole and negative pole, electric capacity C1 positive pole connects D2 negative pole, C1 minus earth, resistance
R3 connects D2 negative pole and ground respectively, and resistance R4 connects audion Q1 base stage respectively and sends out
Emitter-base bandgap grading, Q1 emitter stage connects D2 negative pole, and electric capacity C2 connects Q1 colelctor electrode and ground respectively,
Resistance R6 connects Q1 colelctor electrode and audion Q2 base stage respectively, and resistance R9 connects respectively
The base stage of Q2 and emitter stage, Q2 collector series resistance R5 connects Q1 base stage, electricity
Resistance R11 connects Q2 base stage and C3 positive pole respectively, and Q2 emitter stage connects audion Q4 base
Pole, Q4 grounded emitter, resistance R10 connects Q4 base stage and ground, Q4 current collection respectively
Pole connects audion Q8 base stage, and resistance R7, R8 connect audion Q3 base stage, and R7 is another
One termination Q1 colelctor electrode, R8 other end ground connection, Q3 grounded emitter, Q3 current collection
Pole connects audion Q8 base stage.
Electronic ballast for fluoresent lamp protection circuit the most according to claim 1, it is special
Levy and be: resistance R7, audion Q3 open circuit, resistance R19 short circuit, resistance R13
Open circuit.
Electronic ballast for fluoresent lamp protection circuit the most according to claim 1, it is special
Levy and be: resistance R7, R12, audion Q3, diode D3 open circuit.
Electronic ballast for fluoresent lamp protection circuit the most according to claim 1, it is special
Levy and be: resistance R10, R19 short circuit, audion Q4, resistance R13 open circuit.
Electronic ballast for fluoresent lamp protection circuit the most according to claim 1, it is special
Levying and be: resistance R10 short circuit, diode D3, audion Q4, resistance R12 are disconnected
Road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510228909.7A CN106163068B (en) | 2015-04-28 | 2015-04-28 | Electronic ballast for fluoresent lamp protects circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510228909.7A CN106163068B (en) | 2015-04-28 | 2015-04-28 | Electronic ballast for fluoresent lamp protects circuit |
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| CN106163068A true CN106163068A (en) | 2016-11-23 |
| CN106163068B CN106163068B (en) | 2018-09-07 |
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| CN2692960Y (en) * | 2004-03-31 | 2005-04-13 | 上海亚明灯泡厂有限公司 | Self-follow current deep-protection fluorescent lamp electronic ballast |
| CN101902867A (en) * | 2009-05-26 | 2010-12-01 | 东莞市百分百科技有限公司 | Protection circuit for electronic ballast |
| CN202587457U (en) * | 2012-05-23 | 2012-12-05 | 山东彩霆生态照明器材科技有限公司 | Preheat circuit for energy-saving lamp |
| CN204244196U (en) * | 2014-09-30 | 2015-04-01 | 国家电网公司 | The comprehensive short-circuit protection circuit of electric device |
| CN104470121A (en) * | 2014-11-29 | 2015-03-25 | 成都思茂科技有限公司 | Novel LED drive system with protection function |
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| CN106163068B (en) | 2018-09-07 |
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