CN104717814B - The integrated circuit controller of stabilizer - Google Patents
The integrated circuit controller of stabilizer Download PDFInfo
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- CN104717814B CN104717814B CN201510171913.4A CN201510171913A CN104717814B CN 104717814 B CN104717814 B CN 104717814B CN 201510171913 A CN201510171913 A CN 201510171913A CN 104717814 B CN104717814 B CN 104717814B
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Abstract
The present invention be used for stabilizer and with preheating/again preheating filament with control the lighting time IC controller, include a charge-discharge circuit of one electric capacity of coupling, to provide capacitor charge and discharge path, when IC controller does not have wrong, electric capacity can charge, and made a mistake during fluorescent tube operates or electric capacity can discharge during power supply escape；One control circuit couples charge-discharge circuit, to control charge-discharge circuit to electric capacity charge or discharge；One comparison circuit couples charge-discharge circuit, to compare the voltage signal of threshold voltage and electric capacity, for control sequential and provides a preheating signal and a lighting signals；One logic control circuit couples and controls the control circuit, and couples comparison circuit to receive preheating signal and lighting signals, for preheating filament and to fluorescent tube lighting.Logic control circuit more receives a feedback voltage, for overvoltage protection, once the threshold voltage that feedback voltage exceedes logic control circuit drives electric capacity to discharge through control circuit.
Description
The present invention is divisional application, original applying number：200710163689X, the applying date：On October 18th, 2007, invention name
Claim：The integrated circuit controller of stabilizer
Technical field：
The invention relates to a kind of stabilizer, and particularly relating to one kind has preheating/preheating filament and control lighting again
Time, and for fluorescent tube or the stabilizer of small fluorescent fluorescent tube, it utilizes voltage feedback adjustment operation frequency and overvoltage
Protect and by an additional electric capacity, to carry out heating in advance/again advance heat filament and control lighting time.
Background technology：
In common people's daily life, fluorescent tube is the light source most utilized extensively, and the efficiency for improving fluorescent tube will
Muchly save the energy.In researching and developing now, primarily directed to efficiency and the saving energy of the stabilizer for how promoting fluorescent tube
Source, and the further first preheating filament before fluorescent tube lighting, so filament will be helped to produce free electron more easily, and utilize this
Mode lighting can not only reduce the point modulating voltage at negative electrode both ends, can more improve the service life of fluorescent tube, so many electricity now
Sub- stabilizer or integrated circuit controller all add the function of preheating filament, to allow fluorescent tube to have longer service life.But
Such a mode causes another problem " preheat again ".Again preheating refers to stabilizer within the of short duration time of the unexpected escape of power supply
Not only preheating filament once because filament in this of short duration time still in 1000 ° of K or so high temperature, and the electricity of of short duration time
Source escape will allow stabilizer to reset its function and again preheating filament again.Filament energy twice so can be given, and is made
Into excessive preheating, and excessively preheating can reduce the service life of fluorescent tube, so must avoid that this situation occurs.
Set from above-mentioned, for filament, point modulating voltage and the lighting at negative electrode both ends can be reduced by carrying out preferably preheating
Time.If the lighting time can cause very much fluorescent tube during this period of time to produce high voltage long, the service life of fluorescent tube will be so influenceed,
It so must equally avoid that this situation occurs.
For the function of preheating filament, most of conditional electronic stabilizer is an in parallel electric capacity in fluorescent tube, and conduct
One start-up capacitance, to reach the purpose of the first preheating filament before fluorescent tube lighting.But fluorescent tube can be because of electric capacity when preheating
Pressure drop and produce red-hot electric current (glow current), and red-hot electric current can also reduce the service life of fluorescent tube.
Referring to Fig. 1, its circuit diagram for the series resonant circuit of the conditional electronic stabilizer with preheating filament function.
As illustrated, it reaches preheating filament function by an integrated circuit controller 2.One half bridge inverter 3 is by two switches
31 and 32 are formed, switch 31 and switch 32 be it is controlled be formed on signal S2 and S3 caused by integrated circuit controller 2, switch 31 with
32 complementally switched conductive/cut-offs according to the switching frequency that a resistance 12 and an electric capacity 14 are controlled, and turn on each with cut-off
About 50% work period.One inductance 40, an electric capacity 41 and a fluorescent tube 50 form a resonance circuit, and fluorescent tube 50 is
An electric capacity 51 in parallel, it is to as a start-up capacitance.One pre- heater circuit 1 be by a logic circuit 11, resistance 12, electric capacity 14 with
One switch 15 is formed, and is switched 15 and contacted a resistance 13 and parallel resistance 12., can be by control when a switching signal S1 occurs
System switch 15 and parallel resistance 13 and resistance 12, and control pre- hot function to complete with high switching frequency.Before fluorescent tube lighting, patrol
Preheating time can be controlled by collecting circuit 11.In addition, can avoid on startup, producing stress in filament using high initiation culture, and
Reduce the point modulating voltage of fluorescent tube.
According to above-mentioned circuit, when input voltage DC BUS power supply escape or user, the moment during fluorescent tube operates cuts
When changing power switch, the integrated circuit controller 2 will be allowed can not to perform its function with the pre- heater circuit 1, and can again again
Preheat the filament, thus must avoid giving filament twice energy and repeatedly preheated.Meanwhile uncontrollable lighting at the moment
Time, if the lighting time of fluorescent tube 50 will cause very much the negative electrode at the both ends of fluorescent tube 50 long, a high voltage can be produced within the same time
Drop, this will cause damage to filament and reduces the service life of fluorescent tube.So it must also avoid the above situation.
Referring to Fig. 2, it is another circuit diagram for commonly using electric stabilizer with pre- hot function.An as illustrated, electricity
Hold 61 and couple the integrated circuit controller 2, for controlling preheating time；One electric capacity 62 couples the integrated circuit controller 2, with
For controlling the lighting time.In this circuit, it is necessary to be used to control preheating and lighting time using two additional electric capacity.
The problem of based on above-mentioned located by prior art, it is an object of the invention to provide a kind of stabilizer, and it can control and preheats again
Necessary signal is produced with lighting time, and one electric capacity of utilization, it is a further object of the present invention to provide high-effect and inexpensive
Circuit.
The content of the invention：
An object of the present invention, it is to provide a kind of integrated circuit controller of stabilizer, it is used to control preheating/weight
New preheating filament and the time of lighting.
An object of the present invention, it is the integrated circuit controller that a kind of high-effect and inexpensive stabilizer is provided.
The present invention provides a kind of integrated circuit controller of stabilizer, and it includes a power circuit, power circuit coupling electricity
Source rectifier, to provide the logic circuit inside integrated circuit controller or the power supply needed for control circuit.One charge-discharge circuit
An electric capacity is coupled, to provide capacitor charge and discharge path, and one control circuit of coupling and a comparison circuit, when integrated circuit controls
Electric capacity is then charged when device is not wrong, and electric capacity is then discharged when mistake or power escape are produced during fluorescent tube operates.
Control circuit controls charge-discharge circuit.Comparison circuit couples charge-discharge circuit and a logic control circuit, to compare discharge and recharge electricity
The signal that road is exported, and signal is provided to logic control circuit, to determine highest or minimum switching frequency, and provide signal
To control circuit, to control the charging interval of electric capacity or discharge time.Logic control circuit all couples with a frequency compensated circuit
One feedback control circuit, to receive light tube electric voltage, and logic control circuit coupling comparison circuit, frequency compensated circuit, control electricity
Lu Yuyi oscillating circuits.When light tube electric voltage exceeds the threshold voltage of logic control circuit, it will produce an overvoltage protection
And electric capacity is driven to discharge through control circuit.
Accept above-mentioned, frequency compensated circuit is coupled to logic control circuit and oscillating circuit, and frequency compensated circuit foundation
The threshold voltage of frequency compensated circuit and the voltage of feedback control circuit can set the switching frequency of integrated circuit controller, wherein
Switching frequency can increase and increase with the voltage of feedback control circuit, and switching frequency can be with the voltage of feedback control circuit
Reduce and reduce.Oscillating circuit couples logic control circuit, frequency compensated circuit, one drive circuit and an adaptability no-voltage are cut
Circuit is changed, there is oscillating circuit internal highest switching frequency limitation to be limited with minimum switching frequency, and provide highest switching frequency
Rate or minimum switching frequency to stabilizer a half bridge inverter, once during fluorescent tube operates feedback control circuit feedback
When voltage changes or zero voltage switching occurs, frequency compensated circuit or adaptability Zero voltage switching circuit can change switching frequency.
Adaptability Zero voltage switching circuit couples oscillating circuit and half bridge inverter.Switching frequency can non-zero voltage switch occur or
Increase during the voltage increase of feedback control circuit, and can reduce and reduce with the voltage of feedback control circuit.Drive circuit
Oscillating circuit is coupled, and couples the switch and an electric capacity of half bridge inverter, electric capacity provides switching energy to switch switch.
The beneficial effects of the invention are as follows：A kind of stabilizer is provided, its controllable preheating again and lighting time, Yi Jili
Necessary signal is produced with an electric capacity, while provides a kind of high-effect and inexpensive circuit.
Brief description of the drawings：
Fig. 1 is the circuit diagram of a known electric stabilizer；
Fig. 2 is the circuit diagram of another known electric stabilizer；
Fig. 3 is the circuit diagram of the stabilizer of the present invention；
Fig. 4 is the circuit diagram of the first embodiment of the integrated circuit controller of the stabilizer of the present invention；
Fig. 5 is the oscillogram of the integrated circuit controller of the stabilizer of the present invention；
Fig. 6 is the oscillogram of the zero voltage switching of the present invention；
Fig. 7 is the CL Compare Logic of the present invention and frequency compensated oscillogram；
Fig. 8 is the curve map of the experimental result of the stabilizer of the present invention；
Fig. 9 is the resonant slots Bode diagram with fluorescent tube running point of the present invention；
Figure 10 is the circuit diagram of the second embodiment of the integrated circuit controller of the stabilizer of the present invention；And
Figure 11 is the circuit diagram of the 3rd embodiment of the integrated circuit controller of the stabilizer of the present invention.
Figure number explanation：
The 1 pre- integrated circuit controller of heater circuit 2
The logic circuit of 3 half bridge inverter 11
The resistance of 12 resistance 13
14 electric capacity 15 switch
The integrated circuit controller of 20 integrated circuit controller 20 '
The internal bias voltage circuit of 20 " integrated circuit controller 21
The control circuit of 22 charge-discharge circuit 23
The oscillating circuit of 24 comparison circuit 25
The frequency compensated circuit of 26 logic control circuit 27
The adaptability Zero voltage switching circuit of 28 drive circuit 29
The low-side switch of 31 high side switch 32
The electric capacity of 40 inductance 41
The electric capacity of 50 fluorescent tube 51
The electric capacity of 60 electric capacity 61
The electric capacity of 71 voltage signal 72
81 feedback signals 221 control signal
222 voltage signals 231 control signal
The 241 preheating lighting signals of signal 242
The oscillation signal of 243 sequential control circuit 251
261 highest frequency signals 262 frequency scan signal
The compensating signature of 263 overvoltage protection signal 271
281 metal oxide semiconductor field effect transistors
282 metal oxide semiconductor field effect transistors
291 non-zero voltage signal AGND earth terminals
BS bootlaces end CAP capacitance terminals
DC BUS input voltage FB feedback ends
Fmax highest frequency fmin low-limit frequencies
Fsw switching frequency GND earth terminals
The high Q of HGND bootlace earth terminal High-Q
The low Q HO high-pressure sides output ends of Low-Q
HV high-pressure sides output end IGN lighting signals
LO low-pressure side output ends PRH preheats signal
S1 switching signal S2 switching signals
The threshold voltages of S3 switching signals V3 the 3rd
The threshold voltages of the 4th threshold voltage V5 of V4 the 5th
Vcap capacitance voltages the second threshold voltages of Vign
Vprh the first threshold voltage VCC feed ends
VFB feedback voltage VFC feedback voltages
T1 lighting times preheating time t2
Embodiment：
Have a better understanding and awareness by the feature to the present invention and the effect of reached, sincerely help preferably to implement
Example and cooperation detailed description, illustrate as after：
Referring to Fig. 3, its circuit diagram for the stabilizer of the present invention.As illustrated, a fluorescent tube 50, an inductance 40 and an electricity
It is that series connection is a resonance circuit to hold 41,51 fluorescent tube 50 in parallel of an electric capacity and be a start-up capacitance.Fluorescent tube 50 can be fluorescent tube.It is humorous
The circuit that shakes can produce a sine voltage to drive the fluorescent tube 50 to operate.The series connection one of one switch 31 switchs 32 to form half
Bridge-type phase inverter 3, and couple the resonance circuit.Switch 31 is a high side switch, and couples an input electricity of power converter
DCBUS is pressed, and controlled is formed on caused by a high-pressure side output end HO of an integrated circuit controller 20 a switching signal S2.Open
It is a low-side switch to close 32, and is coupled to ground connection, and the controlled low-pressure side output end LO for being formed on integrated circuit controller 20
Caused switching signal S3.
Fig. 3 is referred to again, and a feedback end FB of integrated circuit controller 20 is coupled to a feedback control circuit 8, to receive
One feedback signal 81 and be used to adjust switching frequency and overvoltage protection of the fluorescent tube 50 during running.Feedback control circuit 8 is
Coupling capacitance 41, fluorescent tube 50 and ground connection, to provide feedback signal 81 via feedback end FB, wherein feedback signal 81 represents fluorescent tube
Voltage.One diode 91 and an electric capacity 9 form a charge pump circuit, and are coupled to a bootlace end BS of integrated circuit controller 20
With a bootlace earth terminal HGND, to provide the switching energy needed for one drive circuit 28 (as shown in Figure 4), and it is used to switch high pressure
Side switch 31.One electric capacity 72 is coupled to a capacitance terminal CAP and an earth terminal GND to provide a voltage signal 71 to integrated circuit control
The internal logic circuit of device 20 processed, wherein earth terminal GND are coupled to ground connection to provide an electric current backhaul, and all signal meetings
Based on earth terminal GND.One feed end VCC of integrated circuit controller 20 is coupled to input voltage DC BUS, to provide integrated electricity
Power supply needed for road controller 20.
Referring to Fig. 4, its block diagram for the first embodiment of the integrated circuit controller of the stabilizer of the present invention.Such as figure
Shown, an internal bias voltage circuit 21 is coupled to feed end VCC, with provide a necessary power supply needed for integrated circuit controller 20 with
One reference voltage.One charge-discharge circuit 22 is coupled to capacitance terminal CAP, reaches pre- to provide the charge and discharge path of electric capacity 72
Heat, lighting, running time and the function of preheating again.It is respectively in room temperature and in work in filament that the situation of optimal preheating filament, which is closed,
The unit area impedance between two impedances when making temperature, it can represent as follows:
Wherein, Th is the operating temperature of filament, and Tc be room temperature or reference temperature, Rc for filament at room temperature or reference temperature
Under impedance value, Rh is impedance value of the filament under operating temperature, and the optimal situation that preheats is this coefficient between 4 to 6.
Again pre- hot function refers to when power supply is in an of short duration time escape and when replying, and preheating filament again, herein
The temperature of period filament still at the working temperature, about 1000 ° of K.The temperature of filament has no in the of short duration time of power supply escape
Method is reduced to room temperature, if so when integrated circuit controller 20 performs pre- hot function again, it will filament energy twice is given,
The service life of fluorescent tube 50 will be so influenceed, the wherein relation between filament temperature and impedance can represent as follows:
Rt=Rc [1+ α (Th-Tc)+β (Th-Tc)2]------------------(2)
Wherein, Rt is impedance value of the filament under temperature t, Rc be filament at room temperature or the impedance value under reference temperature, α
For resistance temperature coefficient, Tc is room temperature or reference temperature, and β is amplification coefficient and Th is operating temperature, for metallic conductor
Speech, β, which can be ignored, to be disregarded, and is as follows so this formula is rewritable:
Rt=Rc [1+ α (Th-Tc)] --- --- --- --- --- --- --- --- ----(3)
Therefore, for filament, impedance value can increase as work temperature h increases, and as work temperature h drops
It is low and reduce.So match the slope of filament temperature reduction if controlling the electric discharge slope of electric capacity 72, you can control preheats again
Time simultaneously can provide an appropriate energy to filament, to avoid when the short time interior power escape, and the situation excessively preheated occur.
Fig. 4 is referred to again, and electric capacity 72 is controlled to be formed on charge-discharge circuit 22.When integrated circuit controller 20 do not have mistake or not
When having any failure signal to be triggered, a control circuit 23 can produce a signal 221 and export to charge-discharge circuit 22, with control
Charge-discharge circuit 22 charges to electric capacity 72.Charge-discharge circuit 22 is coupled to a comparison circuit 24 and control circuit 23, and thoroughly
Cross capacitance terminal CAP coupling capacitances 72.When integrated circuit controller 20 does not have wrong, electric capacity 72 can be charged, and electric capacity
72 voltage can be incrementally increased.When any failure signal is triggered or during power supply escape, electric capacity 72 can discharge, and electric capacity 72
Voltage can gradually be reduced with the slope reduced equivalent to filament temperature.
Accept above-mentioned, comparison circuit 24 is coupled between the logic control circuit 26 of charge-discharge circuit 22 and one, comparison circuit
24 receive a voltage signal 222 from charge-discharge circuit 22, with the voltage of the threshold voltage according to comparison circuit 24 and electric capacity 72
Determine preheating time and lighting pattern.When charge-discharge circuit 22 charges to electric capacity 72, voltage signal 71 can gradually increase, and
Voltage signal 222 is then equivalent to voltage signal 71.
When voltage signal 222 is less than one first threshold voltage (Vprh) (as shown in Figure 5), comparison circuit 24 will produce
One preheating signal (PRH) 241 is simultaneously transmitted to logic control circuit 26, to control an oscillating circuit 25 to produce a tool highest frequency
(fmax) oscillation signal 251 of (as shown in Figure 5), and be used to control one drive circuit 28 to drive (such as Fig. 3 of half bridge inverter 3
It is shown).Oscillation signal 251 determines the switching frequency of the integrated circuit controller 20 of stabilizer.Once preheating signal 241 produces
When, integrated circuit controller 20 is operated under a preheating mode.When voltage signal 222 is less than the first threshold voltage (Vprh)
When, preheating signal 241 can be " low-voltage signal "；When voltage signal 222 is higher than the first threshold voltage (Vprh), signal is preheated
241 can be " high voltage signal ".
When voltage signal 222 continues to increase and more than the first threshold voltage (Vprh), and it is less than one second threshold voltage
(Vign) when (as shown in Figure 5), comparison circuit 24 will produce a lighting signals (IGN) 242 and transmit to logic control circuit
26, to control oscillating circuit 25, and oscillating circuit 25 can gradually decrease frequency until integrated circuit controller 20 limited one
Untill low-limit frequency (fmin) (as shown in Figure 5).When lighting signals 242 produce, integrated circuit controller 20 can operate in
One lighting pattern, and fluorescent tube must complete lighting.When lighting signals 242 produce, if fluorescent tube 50 (as shown in Figure 2) lighting is lost
Lose, or after the disappearance of lighting signals 242, and the lighting of fluorescent tube 50 is too long, integrated circuit controller 20 can enter a fault mode, with
Unsuccessfully protected for a lighting.When voltage signal 222 be located at the first threshold voltage (Vprh) and the second threshold voltage (Vign) it
Between when, lighting signals 242 can be " low-voltage signal "；When voltage signal 222 is more than the second threshold voltage (Vign), lighting news
Numbers 242 can be " high voltage signal ".When voltage signal 222 is higher than the second threshold voltage (Vign) and the disappearance of lighting signals 242,
Integrated circuit controller 20 can operate in an operating mode, and frequency is low-limit frequency (fmin).It is above-mentioned, the first threshold voltage
(Vprh) it is less than the second threshold voltage (Vign), low-limit frequency (fmin) system is less than highest frequency (fmax).
Fig. 4 is referred to again, and the frequency compensated circuit 27 of logic control circuit 26 and one is to be coupled to feedback control via feedback end FB
Circuit 8 (as shown in Figure 3) processed, to receive the feedback signal 81 of feedback control circuit 8, and logic control circuit 26 also couples control
Circuit 23, comparison circuit 24 and oscillating circuit 25.When preheating signal 241 produces from comparison circuit 24, logic control circuit
26 can produce a highest frequency signal 261 and transmit to oscillating circuit 25, with control oscillating circuit 25 via drive circuit 28 with
Highest frequency switching half bridge inverter 3 (as shown in Figure 3).When lighting signals 242 produce from comparison circuit 24, logic control
Circuit 26 will produce a frequency scanning signal 262 to oscillating circuit 25, using gradually reduce switching frequency until switching frequency as
Untill low-limit frequency.When feedback signal 81 is higher than three threshold voltage of a logic control circuit 26, logic control circuit
26 will carry out an overvoltage protection, and logic control circuit 26 can produce an overvoltage protection signal (OVP) 263 and a control is interrogated
Numbers 231, for stopping oscillating circuit 25 and controlling charge-discharge circuit 22 to allow electric capacity 72 to discharge via control circuit 23.Vibration electricity
Road 25 produces the limitation of one highest frequency of tool and a low-limit frequency according to highest frequency signal 261 and frequency scanning signal 262 respectively
The oscillation signal 251 of limitation, to control drive circuit 28.
Fig. 4 is referred to again, and frequency compensated circuit 27 is coupled to logic control circuit 26 and oscillating circuit 25.Feedback signal 81 is entered
One the 4th threshold voltage (V4) and one the 5th threshold voltage (V5) can be divided into by entering frequency compensated circuit 27, wherein the 4th threshold is electric
It is respectively low threshold voltage and high threshold voltage to press (V4) and the 5th threshold voltage (V5).Frequency compensated circuit 27 produces a compensation
Signal 271 is to oscillating circuit 25, to adjust switching frequency.Oscillating circuit 25 produces oscillation signal 251 according to compensating signature 271,
To control drive circuit 28.Switching frequency can increase to highest frequency (fmax) as feedback signal 81 increases, and switch frequency
Rate can be reduced to low-limit frequency (fmin) as feedback signal 81 reduces.3rd threshold voltage (V3) is higher than the 4th threshold voltage
(V4) with the 5th threshold voltage (V5), and the 4th threshold voltage (V4) is less than the 5th threshold voltage (V5).
Fig. 4 is referred to again, and drive circuit 28 couples oscillating circuit 25, and provides height for half bridge inverter 3 is (as shown in Figure 3)
Press side driving to be driven with low-pressure side, and the energy needed for high-pressure side is provided.Drive circuit 28 receives oscillation signal 251, to produce
Switch signal S2 and S3, for respectively via high-pressure side output end HO and low-pressure side output end LO control high side switch 31 with it is low
Side is pressed to switch 32 (as shown in Figure 3).Electric capacity 9 (as shown in Figure 3) is driven via bootlace end BS and bootlace earth terminal HGND couplings
Circuit 28, to provide the energy needed for high side switch 31.
Fig. 4 is referred to again, and adaptability zero voltage switching (ZVS) circuit 29 is to couple semibridge system via bootlace earth terminal HGND
The high side switch 31 of phase inverter 3 and low-side switch 32 (as shown in Figure 3), if non-zero voltage switching betides fluorescent tube running
During, adaptability Zero voltage switching circuit 29 can then detect the switching of this non-zero voltage.Non-zero voltage switching refers to when low
When pressing side 32 conducting of switch, the high side switch 31 of half bridge inverter 3 and the voltage of low-side switch 32 are not no-voltages, institute
Half bridge inverter 3 is coupled to adaptability Zero voltage switching circuit 29, for when low-side switch 32 turns on, detecting is high
Press side switch 31 and the voltage of low-side switch 32.When non-zero voltage switches generation, adaptability Zero voltage switching circuit 29
A non-zero voltage signal 291 can be produced to oscillating circuit 25, to control oscillating circuit 25 to increase switching frequency until returning back to zero
Untill voltage switching.
Referring to Fig. 5, its oscillogram for the integrated circuit controller of the present invention.Fig. 3 and Fig. 4 is referred in the lump, wherein,
Vcap is across the voltage on electric capacity 72 (as shown in Figure 4), and power supply is power signal when power supply turns on, and PRH is preheating signal
241 (as shown in Figure 4), IGN are lighting signals 242 (as shown in Figure 4), and fsw is switching frequency, and filament temperature is fluorescent tube fortune
Filament temperature during work.When power supply turns on, charge-discharge circuit 22 (as shown in Figure 4) can allow electric capacity 72 to charge, and electric capacity 72
Voltage can gradually increase.When the voltage Vcap of electric capacity 72 is less than the first threshold voltage of comparison circuit 24 (as shown in Figure 4)
(Vprh) when, comparison circuit 24 can produce preheating signal (PRH) 241, and with into preheating mode, and preheating time is expressed as t1.
In a period of preheating time (t1), switching frequency operates in highest frequency (fmax), and filament temperature can be gradually increased to operate
Temperature Th.
Accept it is above-mentioned, when the voltage (Vcap) of electric capacity 72 continue to increase and less than comparison circuit 24 the second threshold voltage
(Vign) when, comparison circuit 24 can produce lighting signals (IGN) 242, and to enter lighting pattern, and the lighting time is expressed as t2,
Switching frequency can be reduced untill being reduced to low-limit frequency (fmin) in the lighting time (t2).When the voltage of electric capacity 72
(Vcap) when being higher than the second threshold voltage (Vign), that is, refer to fluorescent tube 50 and grasped in (as shown in Figure 3) is during running time (t3)
Make in operating mode, switching frequency is low-limit frequency (fmin) within period this time (t3), unless non-zero voltage occurs.
Accept above-mentioned, when power supply is in an interior escape of of short duration time (t4), filament temperature will reduce and equivalent to electric capacity
72 voltage, and oscillating circuit 25 will stop.When power supply escape, if the tension discharge slope of electric capacity 72 is equivalent to filament temperature
Degree reduce, then can power supply reply after, according to electric capacity 72 voltage obtain filament state and control again preheating time or
Again the lighting time, wherein preheating time is expressed as t1 ' and t2 with the lighting time again again '.Switching frequency is again
Still it is highest frequency (fmax), switching frequency and the interior reduction during the lighting time (t2 ') again in during preheating time (t1 ')
Untill low-limit frequency (fmin).When power supply is when the time, (t6) was completely switched off, the voltage (Vcap) of electric capacity 72 can be discharged to
Zero, to enter next operation cycle of fluorescent tube.
Referring to Fig. 6, its oscillogram for the zero voltage switching of the present invention.If not zero voltage switching produces, then adaptability
Zero voltage switching circuit 29 (as shown in Figure 4) will adjust switching frequency untill replying zero voltage switching, and maintain this to cut
Change frequency.
Referring to Fig. 7, its CL Compare Logic for the present invention and frequency compensated oscillogram.VFB shown in figure is feedback
FB (as shown in Figure 4) feedback voltage is held, it is feedback signal 81 (as shown in Figure 4).VFC is that feedback voltage passes through frequency compensation
The voltage that circuit 27 (as shown in Figure 4) is partitioned into.As previously described, feedback end FB has two functions, and respectively overvoltage is protected
Shield and adjustment switching frequency, and it is used for logic control circuit 26 and frequency compensated circuit 27 (as shown in Figure 4).Feedback end FB has
There are three threshold voltages, one is the threshold voltage (V3) that logic control circuit 26 is used for overvoltage protection, and other are frequency compensation
Circuit 27 is used for the threshold voltage (V4) and (V5) for adjusting and setting switching frequency.
Accept it is above-mentioned, once the feedback signal 81 exceed logic control circuit 26 the 3rd threshold voltage (V3) when, it will
Generation overvoltage protection, and integrated circuit controller 20 (as shown in Figure 3) will enter fault mode.Feedback signal 81 enters frequency
After rate compensation circuit 27, it will be divided into the 4th threshold voltage (V4) and the 5th threshold voltage (V5), mended for switching frequency
Repay, and frequency compensated circuit 27 also can be according to the feedback electricity between the 4th threshold voltage (V4) and the 5th threshold voltage (V5)
Pressure and the highest frequency and low-limit frequency setting switching frequency using oscillating circuit 25.
Referring to Fig. 8, its curve map for the experimental result of the stabilizer of the present invention.As illustrated, power output, light are defeated
Go out and switching frequency between relation curve show as bell, that is, light output and power output will not be with switching frequencies
Rate increases and increased, and has a maximum.The right side of maximum is a steady operation region, and the generally running of resonance stabilizer exists
In this region, the left side of maximum is a unstable working region, by this working region easily eliminates fluorescent tube 50 (such as Fig. 3 institutes
Show) electric arc, so stabilizer should avoid running in this regional extent.
Referring to Fig. 9, its resonant slots Bode diagram (Bode plot) with fluorescent tube operating point for the present invention.As schemed
Show, switching frequency starts from higher frequency, and untill gradually decreasing up to fluorescent tube lighting, switching frequency reduces the phase in frequency
Between must be by the high Q areas (High-Q) of resonance circuit, to provide to the energy needed for fluorescent tube lighting.After fluorescent tube lighting, cut
Required frequency can be reduced to and resonance circuit can be allowed to operate in low Q areas (Low-Q) by changing frequency, to stablize the electric arc of fluorescent tube.
Referring to Fig. 10, its circuit diagram for the second embodiment of the integrated circuit controller of the present invention.As illustrated, this
Most internal circuit of the integrated circuit controller 20 ' of embodiment is the integrated circuit controller 20 for being same as first embodiment,
So it will not be repeated here.The integrated circuit controller 20 of first embodiment is main with the integrated circuit controller 20 ' of the present embodiment
Difference is wanted to be the switch 31 and 32 of the integrated circuit controller 20 of first embodiment respectively by metal oxide semiconductor field
Effect transistor (MOSFET) 281 and 282 substitutes and is arranged in integrated circuit controller 20 '.Metal oxide semiconductor field effect is brilliant
Body pipe 281 is coupled to a high-pressure side output end HV, and it couples input voltage DC BUS (as shown in Figure 3), and metal oxidation is partly led
Body field-effect transistor 282 is coupled to an earth terminal AGND, and it is coupled to ground connection.Metal oxide semiconductor field effect transistor 281 with
282 be to connect and be coupled to drive circuit, for minimizing the board area of stabilizer.
Figure 11 is referred to, it is the circuit diagram of the 3rd embodiment of the integrated circuit controller of the present invention.As illustrated, this
Most internal circuit of the integrated circuit controller 20 " of embodiment is identical with the integrated circuit controller 20 ' of second embodiment,
So it will not be repeated here.The integrated circuit controller 20 " of second embodiment and the main difference of integrated circuit controller 20 ' part
It is, a sequential control circuit 243 substitution electric capacity 72 and charge-discharge circuit 22, for preheating, electric light and the control of running time
System, its function is same as the function of the foregoing description of the present invention, therefore control circuit 23 is coupled to sequential control circuit 243, and controls
Sequential control circuit 243.Sequential control circuit 243 according to one sequential/counting circuit (not shown), and with one inside preheat when
Between t1 and lighting time t2, to provide preheating signal 241 with lighting signals 242 to logic control circuit 26, and be used to preheating with
The control of lighting pattern.
It is described above, it is only the preferred embodiment of the present invention, is not used for limiting the scope that the present invention is implemented, it is all
According to the equivalent changes and modifications carried out by the shape described in scope of the invention as claimed, construction, feature and spirit, all should be included in
In scope of the presently claimed invention.
Claims (15)
1. a kind of integrated circuit controller of stabilizer, it is characterised in that it is included:
One oscillating circuit, produce an oscillation signal；
One drive circuit, the switching frequency of the integrated circuit controller of the stabilizer is determined according to the oscillation signal；
One sequential control circuit, the slope that a filament temperature of a fluorescent tube reduces is matched with, a preheating signal is produced, with control
One preheating time；
One control circuit, to control the sequential control circuit；And
One logic control circuit, couple and control the control circuit, and couple the sequential control circuit, receive SECO electricity
The preheating signal on road, to preheat a filament of the fluorescent tube with controlling the oscillating circuit.
2. integrated circuit controller as claimed in claim 1, it is characterised in that the logic control circuit is according to the preheating signal
The oscillating circuit is controlled, the oscillation signal of tool one highest frequency limitation is produced, controls the switching frequency to operate in a most high frequency
Rate.
3. integrated circuit controller as claimed in claim 1, it is characterised in that the sequential control circuit stops the preheating signal
And a lighting signals are produced, and the logic control circuit receives the lighting signals, with to the fluorescent tube lighting.
4. integrated circuit controller as claimed in claim 3, it is characterised in that the logic control circuit is according to the lighting signals
The oscillating circuit is controlled to produce the oscillation signal of tool one low-limit frequency limitation, to reduce the switching frequency until the switching frequency
Untill being reduced to a low-limit frequency.
5. integrated circuit controller as claimed in claim 4, it is characterised in that the lighting signals stop and the switching frequency is
The low-limit frequency.
6. integrated circuit controller as claimed in claim 3, it is characterised in that when the fluorescent tube lighting fails, interrogated in the lighting
Number disappear after, start a lighting unsuccessfully protect.
7. integrated circuit controller as claimed in claim 1, it is characterised in that the logic control circuit has a threshold voltage
And a feedback signal of a feedback control circuit of the stabilizer is received, to an overvoltage protection, the feedback signal is higher than should
During the threshold voltage of logic control circuit, the logic control circuit stops the oscillating circuit.
8. integrated circuit controller as claimed in claim 1, it is characterised in that further include:
One frequency compensated circuit, there is a low threshold voltage and a high threshold voltage, and couple the feedback control of the stabilizer
Circuit, to receive a feedback signal, and control the vibration electric according to the feedback signal, the low threshold voltage and the high threshold voltage
Road, determine the switching frequency and a frequency compensation.
9. integrated circuit controller as claimed in claim 8, it is characterised in that the frequency compensated circuit splits the feedback signal
Between the low threshold voltage and the high threshold voltage.
10. integrated circuit controller as claimed in claim 1, it is characterised in that further include:
One adaptability Zero voltage switching circuit, couples the multiple switch of the stabilizer, and a low-side switch of the plurality of switch is led
When logical, the adaptability Zero voltage switching circuit detects the voltage of the plurality of switch, and the voltage of the plurality of switch is not zero and this is low
When pressing side switch conduction, the adaptability Zero voltage switching circuit controls the oscillating circuit, to adjust the switching frequency until this is more
Untill the voltage zero of individual switch.
11. integrated circuit controller as claimed in claim 10, it is characterised in that the adaptability Zero voltage switching circuit is in this
When low-side switch turns on, a high side switch of the plurality of switch and the voltage of the low-side switch are detected.
12. integrated circuit controller as claimed in claim 10, it is characterised in that the adaptability Zero voltage switching circuit is in this
When the voltage of multiple switch is not zero and non-zero voltage switching occurs, the switching frequency is adjusted.
13. integrated circuit controller as claimed in claim 1, it is characterised in that further include:
One internal bias voltage circuit, an input voltage is coupled, to provide power supply.
14. integrated circuit controller as claimed in claim 1, it is characterised in that the multiple switch of the stabilizer is respectively one
Low-side switch and a high side switch, to be used as a half bridge inverter.
15. integrated circuit controller as claimed in claim 1, it is characterised in that the multiple switch of the stabilizer is built into this
Integrated circuit controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510171913.4A CN104717814B (en) | 2007-10-18 | 2007-10-18 | The integrated circuit controller of stabilizer |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510171913.4A CN104717814B (en) | 2007-10-18 | 2007-10-18 | The integrated circuit controller of stabilizer |
| CN200710163689.XA CN101141844B (en) | 2007-06-15 | 2007-10-18 | The integrated circuit controller of stabilizer |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710163689.XA Division CN101141844B (en) | 2007-06-15 | 2007-10-18 | The integrated circuit controller of stabilizer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104717814A CN104717814A (en) | 2015-06-17 |
| CN104717814B true CN104717814B (en) | 2017-12-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510171913.4A Active CN104717814B (en) | 2007-10-18 | 2007-10-18 | The integrated circuit controller of stabilizer |
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| Country | Link |
|---|---|
| CN (1) | CN104717814B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437717A (en) * | 2000-06-19 | 2003-08-20 | 国际整流器有限公司 | Ballast control IC with minimal internal and external components |
| US6822401B2 (en) * | 2001-01-24 | 2004-11-23 | Stmicroelectronics S.R.L. | Fault management method for electronic ballast |
| CN1757163A (en) * | 2003-03-03 | 2006-04-05 | 国际整流器公司 | Digital lighting ballast oscillator |
-
2007
- 2007-10-18 CN CN201510171913.4A patent/CN104717814B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1437717A (en) * | 2000-06-19 | 2003-08-20 | 国际整流器有限公司 | Ballast control IC with minimal internal and external components |
| US6822401B2 (en) * | 2001-01-24 | 2004-11-23 | Stmicroelectronics S.R.L. | Fault management method for electronic ballast |
| CN1757163A (en) * | 2003-03-03 | 2006-04-05 | 国际整流器公司 | Digital lighting ballast oscillator |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104717814A (en) | 2015-06-17 |
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