CN103296914A - Half-bridge drive device - Google Patents
Half-bridge drive device Download PDFInfo
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- CN103296914A CN103296914A CN2012100639800A CN201210063980A CN103296914A CN 103296914 A CN103296914 A CN 103296914A CN 2012100639800 A CN2012100639800 A CN 2012100639800A CN 201210063980 A CN201210063980 A CN 201210063980A CN 103296914 A CN103296914 A CN 103296914A
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- 230000000630 rising effect Effects 0.000 claims abstract description 11
- 230000009471 action Effects 0.000 claims description 23
- 230000007423 decrease Effects 0.000 claims description 12
- 230000000052 comparative effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 abstract description 3
- 239000003990 capacitor Substances 0.000 description 22
- 230000008859 change Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 230000007246 mechanism Effects 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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Abstract
The invention discloses a half-bridge driving device which comprises a controller, a half-bridge driver, a non-zero voltage detector and a resonant circuit. The controller generates a first control signal and a second control signal. The half-bridge driver is provided with an output end, receives the reference power voltage, the reference grounding voltage and the first and second control signals, and enables the reference power voltage to charge the output end or enables the reference grounding voltage to discharge the output end according to the first and second control signals respectively. The non-zero voltage detector generates a non-zero voltage detection result according to the falling or rising slope of the voltage on the output end. The resonant circuit generates a driving output voltage according to the voltage at the output terminal.
Description
Technical field
The invention relates to a kind of half-bridge driven device, and particularly relevant for a kind of non-zero voltage detector and detection mode thereof of half-bridge driven device.
Background technology
In the half-bridge driven device, half-bridge driver under it, at do not equal zero voltage level and when carrying out change action of its output voltage, can be because the power transistor on the half-bridge driver directly bears certain voltage drop, and, the power transistor of conducting is under the very little relatively state of its conducting resistance, have the power transistor that a very big electric current is flowed through and is switched on, except the loss that produces very big energy switching, also might cause burning of power transistor or other related elements, produce the misgivings on the safety.
In existing half-bridge driven device; have by the electric current that resistance is set or detect on the half-bridge driven device at series resistor between the path of half-bridge driver ground connection at load end to change, and make the half-bridge driven device start the protection action in the moment (non-zero voltage takes place switch phenomenon) that electric current rises suddenly.In addition, existing half-bridge driven device also proposes to judge by the output voltage that direct detection half-bridge driver produces whether the half-bridge driven device has the non-zero voltage of generation to switch phenomenon, and starts the protection action of bridge driving device according to this.
Summary of the invention
The object of the present invention is to provide a kind of half-bridge driven device, effectively detect the switching phenomenon of non-zero voltage, to guarantee the fail safe of device.
The present invention proposes a kind of half-bridge driven device, comprises controller, half-bridge driver, non-zero voltage detector and resonant circuit.Controller produces first control signal and second control signal.Half-bridge driver has output, and half-bridge driver receives reference voltage, with reference to earthed voltage and first and second control signal, and according to first and second control signal reference voltage is charged to output respectively or output is discharged to the reference earthed voltage.The non-zero voltage detector couples output, and produces the non-zero voltage testing result according to the decline of the voltage on the output or the slope of rising.Resonant circuit couples output, and produces the driving output voltage according to the voltage on the output.
In one embodiment of this invention, above-mentioned non-zero voltage detector comprises electric capacity and resistance.First end of electric capacity couples output, and resistance string is connected on second end of electric capacity and with reference between earthed voltage, wherein, the end points that electric capacity and resistance couple produces the non-zero voltage testing result.
In one embodiment of this invention, the half-bridge driven device also comprises charge pump circuit, and charge pump circuit is coupled to output, comprises electric capacity and Zener diode.First end of electric capacity couples output.Zener diode is serially connected in second end of electric capacity and with reference between earthed voltage, wherein, produces accessory power supply on the end points that electric capacity and Zener diode couple.
In one embodiment of this invention, the end points that above-mentioned electric capacity and Zener diode couple more is coupled to controller, and the operating voltage of accessory power supply as controller is provided.
In one embodiment of this invention, the half-bridge driven device also comprises charge pump circuit.Charge pump circuit is coupled between the path that output couples the non-zero voltage detector.Charge pump circuit also is coupled on the end points of non-zero voltage detector generation non-zero voltage testing result, and charge pump circuit comprises electric capacity and Zener diode.First end of electric capacity couples output, and its second end is coupled to the non-zero voltage detector.Second end and non-zero voltage detector that Zener diode is serially connected in electric capacity produce between the end points of non-zero voltage testing result, and wherein, the end points that electric capacity and Zener diode couple produces accessory power supply.
In one embodiment of this invention, the half-bridge driven device also comprises the guard signal generator.The guard signal generator couples the non-zero voltage detector, according to judging that the non-zero voltage testing result produces the protection enable signal.
In one embodiment of this invention, above-mentioned guard signal generator comprises comparator and latch unit.Comparator couples the non-zero voltage detector and compares at non-zero voltage testing result and preset critical, to produce comparative result.Latch unit couples comparator with the breech lock comparative result, and according to being provided the protection enable signal by the comparative result of breech lock.
In one embodiment of this invention, above-mentioned controller also is coupled to the guard signal generator to receive the protection enable signal.Controller stops driving the generation action of output voltage according to the protection enable signal.
In one embodiment of this invention, above-mentioned half-bridge driver comprises the first transistor and transistor seconds.The first transistor has first end, second end and control end, and its first termination is received reference voltage, and its control end receives first control signal, and its second end couples output.Transistor seconds has first end, second end and control end, and its first end couples output to receive reference voltage, and its control end receives second control signal, and its second termination is received with reference to earthed voltage.
Based on above-mentioned, the present invention is by detecting half-bridge driver when carrying out change action, and the decline of the voltage that produces on its output or the slope of rising produce the non-zero voltage testing result.And learn by this non-zero voltage testing result whether the half-bridge driven device phenomenon that non-zero voltage is switched takes place, switch the phenomenon that element that phenomenon produces burns effectively to prevent the half-bridge driven device because of non-zero voltage.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 is the schematic diagram of the half-bridge driven device 100 of one embodiment of the invention;
Fig. 2 is the schematic diagram of the half-bridge driven device 200 of another embodiment of the present invention;
Fig. 3 A is the schematic diagram of the half-bridge driven device 300 of yet another embodiment of the invention;
Fig. 3 B and Fig. 3 C are the movement oscillogram of the half-bridge driven device of the embodiment of the invention;
Fig. 4 is the more schematic diagram of the half-bridge driven device 400 of an embodiment of the present invention.
Wherein, description of reference numerals is as follows:
100,200,300: the half-bridge driven device;
110,210,310: controller;
120,220,320: half-bridge driver;
130,230,330: the non-zero voltage detector;
140,240,340: resonant circuit;
250,350: charge pump circuit;
360: the guard signal generator;
361: latch unit;
190,290: load;
COMP: comparator;
D1, D2: time interval;
VOT: voltage;
R, S, Q: end points;
RESET: reset signal;
N1, N2: transistor;
CTRL1, CTRL2: control signal;
VREF, VREF1, VREF2: preset critical;
PRTEN: protection enable signal;
R1, R2: resistance R 1;
C1～C4: electric capacity;
ZD1: Zener diode;
D1: diode;
OT: output;
VAUX: accessory power supply;
GND: with reference to earthed voltage;
VCC: supply voltage;
VBUS: reference voltage;
NZR: non-zero voltage testing result;
ODRV: drive output voltage ODRV.
Embodiment
Please refer to Fig. 1, Fig. 1 is the schematic diagram of the half-bridge driven device 100 of one embodiment of the invention.Half-bridge driven device 100 comprises controller 110, half-bridge driver 120, non-zero voltage detector 130 and resonant circuit 140.Controller 110 produces control signal CTRL1 and CTRL2.Half-bridge driver 120 is coupled to controller 110.Half-bridge driver 120 receives control signal CTRL1 and CTRL2, with reference to earthed voltage GND and reference voltage VBUS.Half-bridge driver 120 also charges the output OT of the half-bridge driver 120 of reference voltage VBUS or the reference earthed voltage of output OT GND is discharged according to control signal CTRL1 and CTRL2.110 of controllers receive supply voltage VCC with as its operating voltage.
Furthermore bright, controller 110 can charge (this moment control signal CTRL2 equal low voltage level) the output OT of the half-bridge driver 120 of reference voltage VBUS according to the control signal CTRL1 that for example is high-voltage level, and after a time cycle, controller 110 can discharge (this moment control signal CTRL1 switch to low voltage level) the reference earthed voltage of the output OT GND of half-bridge driver 120 according to the control signal CTRL2 that switches to high-voltage level.It should be noted that charge action and the discharging action of the reference earthed voltage of output OT GND of the output OT of reference voltage VBUS can not take place simultaneously.That is to say that in the present embodiment, control signal CTRL1 and CTRL2 can not equal high-voltage level simultaneously.
Non-zero voltage detector 130 couples the output OT of half-bridge driver 120, and produces non-zero voltage testing result NZR according to the decline of the voltage on the output OT of half-bridge driver 120 or the slope of rising.Making the reference earthed voltage of output OT GND begin to carry out discharging action with half-bridge driver 120 is example, when the non-zero voltage change action takes place in half-bridge driven device 100, because the voltage level on the output OT is higher than the voltage level with reference to earthed voltage GND at this moment, therefore, the voltage on the output OT of half-bridge driver 120 can be forced to and drop to fast and equal (even a little less than) with reference to the voltage level of earthed voltage GND.Opposite, when if the non-zero voltage change action does not take place in half-bridge driven device 100, because the voltage level on this moment output OT equals (or no better than) with reference to the voltage level of earthed voltage GND, therefore, the discharging action on the performed output OT of half-bridge driver 120 only can make voltage level on the output OT produce by a small margin decline.Therefore, 130 of non-zero voltage detectors can know whether half-bridge driven device 100 has the change action that produces non-zero voltage by the decrease speed (descending slope of voltage just) of the voltage level on the output OT that detects half-bridge driver 120.
Can be learnt by above-mentioned example, voltage level on output OT is dropped to reference to earthed voltage GND fast by a high level voltage greater than zero, or by a low level voltage that is lower than reference voltage VBUS, when rising to reference voltage VBUS fast, non-zero voltage detector 130 can learn that half-bridge driven device 100 produces change action and the corresponding non-zero voltage testing result NZR that produces of non-zero voltage by the decline of the voltage on the output OT or the slope of rising.That is to say that when the slope of the decline of the voltage on the output OT or rising during greater than a preset critical, the change action of non-zero voltage takes place the non-zero voltage testing result NZR indication half-bridge driven device 100 that non-zero voltage detector 130 produces.
In simple terms, in an embodiment of the present invention, non-zero voltage detector 130 can capture the voltage on the output OT, and detects the magnitude of voltage on the output OT, the intensity of variation of the rising that produces in the interval or decline produces non-zero voltage testing result NZR at a fixed time.That is to say that non-zero voltage detector 130 can just can correspondingly produce non-zero voltage testing result NZR by the magnitude of voltage on the output OT and preset critical are compared.
Resonant circuit 140 couples output OT, and produce according to the voltage on the output OT and to drive output voltage ODRV, driving output voltage ODRV wherein is used for driving load 190, in the present embodiment, load 190 can be fluorescent tube, driving output voltage ODRV then is to be used to provide the sinusoidal wave high frequency voltage of fluorescent tube and electric current, and uses and light fluorescent tube.
Below please refer to Fig. 2, Fig. 2 is the schematic diagram of the half-bridge driven device 200 of another embodiment of the present invention.Half-bridge driven device 200 comprises controller 210, half-bridge driver 220, non-zero voltage detector 230, resonant circuit 240 and charge pump circuit 250.In the present embodiment, half-bridge driver 220 comprises transistor N1 and N2, first end of transistor N1 (for example drain electrode) receives reference voltage VBUS, its control end (for example grid) is coupled to controller 210 to receive control signal CTRL1, and its second end (for example source electrode) is coupled to output OT.First end of transistor N2 (for example drain electrode) is coupled to output OT, and the control end of transistor N2 (for example grid) is coupled to controller 210 to receive control signal CTRL2, and second end of transistor N2 (for example source electrode) receives with reference to earthed voltage GND.
230 of non-zero voltage detectors are serially connected in output OT and with reference between earthed voltage GND, non-zero voltage detector 230 comprises capacitor C 1 and resistance R 1.First end of capacitor C 1 couples output OT, and second end of capacitor C 1 is coupled to resistance R 1, and resistance R 1 is to be serially connected in second end of capacitor C 1 and with reference between earthed voltage GND, and by producing non-zero voltage testing result NZR on second end of capacitor C 1.
It should be noted that when the voltage on the output OT produces the phenomenon of fast rise or decline fast the capacitor C 1 that is coupled to output OT can produce a pulse signal up or down at its second end because of the election effect of electric capacity.The amplitude of this pulse signal can decide in response to the late effect that the slope of the decline of the voltage on the output OT or rising and capacitor C 1 and resistance R 1 provide.That is to say when producing non-zero voltage switching phenomenon, will have periodic a plurality of downward pulse signals that upwards reach on the non-zero voltage testing result NZR that non-zero voltage detector 230 produces.And the time point that non-zero voltage are switched phenomenons can take place no better than half-bridge driver 220 in the time point of generation pulse signal.
Can be known by above-mentioned explanation and to learn, by observing the amplitude of the pulse signal that produces on the non-zero voltage testing result NZR, just can know the slope of decline or the rising of the voltage on the output OT, just can learn also whether half-bridge driver 220 non-zero voltage takes place switch phenomenon.And start the protection mechanism of half-bridge driven device 200 accordingly.
Subsidiary one carries, and in the present embodiment, the half-bridge driven device also comprises charge pump circuit 250.Charge pump circuit 250 is coupled to output OT, and moves with the charging of carrying out charge pump (charge pump) by the voltage that receives on the output OT, and produces accessory power supply VAUX.In this enforcement, charge pump circuit 250 comprises capacitor C 2 and Zener diode ZD1.First end of capacitor C 2 couples output OT, and Zener diode ZD1 then is serially connected in second end of capacitor C 2 and with reference between earthed voltage GND.Wherein, capacitor C 2 produces accessory power supply VAUX with the end points that Zener diode ZD1 couples.
Capacitor C 2 can be coupled to the end points that controller 210 receives supply voltage VCC with the end points that Zener diode ZD1 couples, and with accessory power supply VAUX by diode D1 provide to controller 210 with the supply power supply as controller 210.In addition, supply voltage VBUS can offer supply voltage VCC by resistance R 2, with as the required startup power supply of controller 210.
240 of resonant circuits comprise inductance L 1, capacitor C 3 and C4.Inductance L 1 and capacitor C 3 are serially connected in 290 of output OT and loads in regular turn, and 4 of capacitor C are coupled to capacitor C 3, and with load 290 and connect and couple.Inductance L 1 on the resonant circuit 240, capacitor C 3 and C4 go up the square-wave signal that the change action according to half-bridge driver 220 produces in order to receive output OT, and the square-wave signal on the conversion output OT with the driving output voltage ODRV that produces periodic sine wave to drive load 290.
Below please refer to Fig. 3 A, Fig. 3 A is the schematic diagram of the half-bridge driven device 300 of yet another embodiment of the invention.Half-bridge driven device 300 comprises controller 310, half-bridge driver 320, non-zero voltage detector 330, resonant circuit 340, charge pump circuit 350 and guard signal generator 360.300 in half-bridge driven device is made of transistor M1 and M2.Inequality with aforesaid embodiment, the half-bridge driven device 300 of present embodiment also comprises guard signal generator 360.Wherein, guard signal generator 360 is coupled to non-zero voltage detector 330 and receives the non-zero voltage testing result NZR that non-zero voltage detector 330 produces, and produces protection enable signal PRTEN whether to have according to the amplitude of judging non-zero voltage testing result NZR greater than preset critical VREF.
Below please be simultaneously with reference to Fig. 3 A, Fig. 3 B and Fig. 3 C, wherein Fig. 3 B and Fig. 3 C are the movement oscillogram of the half-bridge driven device of the embodiment of the invention.Wherein, in time interval D2, half-bridge driver 320 stops action that output OT is charged, and in the moment that time interval D2 finishes, opens the path of the reference earthed voltage of output OT GND discharge.At the same time, because the voltage VOT on the output OT is a non-zero and greater than zero voltage level, therefore, the change action of so-called non-zero voltage takes place, and voltage VOT is descended fast.It should be noted that, the moment that finishes with time interval D2 is example, this moment transistor M2 according to control signal CTRL2 conducting so that a little resistance value to be provided at output OT and between with reference to earthed voltage GND, and have at output OT and between with reference to earthed voltage GND under the state of voltage difference to a certain degree, will corresponding voltage difference between the source of transistor M2, drain electrode and produce big electric current and cause transistor M2 to be burnt.
On the other hand, non-zero voltage detector 330 detects the quick down maneuver of voltage VOT, and produces the non-zero voltage testing result NZR of the negative pulse with high amplitude.360 of guard signal generators produce protection enable signal PRTEN by non-zero voltage testing result NZR and preset critical VREF1 are compared.In the present embodiment, be to have amplitude greater than the pulse signal of preset critical VREF 1 among the non-zero voltage testing result NZR, therefore, protection enable signal PRTEN will be enabled, and start the protection mechanism of half-bridge driven device 300.
In addition, in the moment that time interval D1 finishes, the path of the output OT charging of reference voltage GND is unlocked, and since the voltage level of voltage VOT on the output OT less than reference voltage VBUS, and the change action of so-called non-zero voltage takes place, and voltage VOT is risen fast.Non-zero voltage detector 330 detects the fast rise action of voltage VOT, and produces the non-zero voltage testing result NZR of the positive pulse with high amplitude.Therefore, in the embodiment of the invention, guard signal generator 360 also can produce protection enable signal PRTEN by non-zero voltage testing result NZR and preset critical VREF2 are compared.In the present embodiment, be to have amplitude greater than the pulse signal of preset critical VREF2 among the non-zero voltage testing result NZR, therefore, protection enable signal PRTEN will be enabled, and can start the protection mechanism of half-bridge driven device 300 equally.
It should be noted that the voltage change action that the protection mechanism of half-bridge driven device 300 can be by closing half-bridge driver 320 or adjust control signal CTRL1 that controller 310 produces and the switching frequency of CTRL2 is finished.Therefore, protection enable signal PRTEN can be provided in the controller 310, and makes controller 310 adjust control signal CTRL1 and the CTRL2 that produces according to protection enable signal PRTEN.
In addition, please refer to Fig. 3 C.In the moment that time interval D2 finishes, because the voltage VOT on the output OT is very near 0 volt, therefore, the change action that this moment, half-bridge driver 320 produced is the change action of so-called no-voltage.Non-zero voltage detector 330 has the non-zero voltage testing result NZR of negative pulse with generation by the down maneuver that detects voltage VOT.Because the variation slope of voltage VOT is not high, therefore, the absolute value of voltage of non-zero voltage testing result NZR also fails to be higher than preset critical VREF1 or preset critical VREF2.Can learn thus, be example with time interval D2, and transistor M2 is at foundation control signal CTRL2 and the moment of conducting, the source of transistor M2, drain electrode will between can not have voltage drop to a certain degree and the risk of burning is arranged.Therefore, under this state, protection enable signal PRTEN does not need to be enabled yet.
Below please refer to Fig. 4, Fig. 4 is the more schematic diagram of the half-bridge driven device 400 of an embodiment of the present invention.Half-bridge driven device 400 comprises controller 410, half-bridge driver 420, non-zero voltage detector 430, resonant circuit 440 and charge pump circuit 450.In the present embodiment, non-zero voltage detector 430 is couple to output OT by the capacitor C 2 in the charge pump circuit 450, and wherein, capacitor C 2 is serially connected in 430 of output OT and non-zero voltage detectors.The Zener diode ZD1 of charge pump circuit 450 then is that second end and the non-zero voltage detector 430 that are serially connected in capacitor C 2 produce between the end points of non-zero voltage testing result NZR.Thus, the voltage on the output OT is resent to non-zero voltage detector 430 after can passing through the dividing potential drop of capacitor C 2 and C1.Therefore, capacitor C 1 can not need to use bears high-tension electric capacity and comes construction, effectively reduces the required cost of circuit.
In sum, the present invention detects the slope that the voltage on the output of half-bridge driver rises or descends by the non-zero voltage detector, and knows accordingly whether the half-bridge driven device has the phenomenon that non-zero voltage is switched takes place.Do not increasing a large amount of circuit elements, and do not influencing under the situation of power conversion efficiency of half-bridge driven device, effectively detecting the situation of zero voltage switching, and guarantee the safety of system.
Though the present invention discloses as above with embodiment; so it is not in order to limit the present invention; technical field technical staff under any; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope of the applying for a patent person of defining.
Claims (10)
1. a half-bridge driven device is characterized in that, comprising:
One controller produces one first control signal and one second control signal;
One half-bridge driver, has an output, this half-bridge driver receives a reference voltage, with reference to earthed voltage and this first control signal and this second control signal, and according to this first control signal and this second control signal this reference voltage is charged to this output respectively or this output is discharged with reference to earthed voltage to this;
One non-zero voltage detector couples this output, and produces a non-zero voltage testing result according to the decline of the voltage on this output or the slope of rising; And
One resonant circuit couples this output, and produces a driving output voltage according to the voltage on this output.
2. half-bridge driven device as claimed in claim 1, wherein this non-zero voltage detector comprises:
One electric capacity, its first end couples this output; And
One resistance, be serially connected in this electric capacity second end and should be with reference between earthed voltage,
Wherein, the end points that couples of this electric capacity and this resistance produces this non-zero voltage testing result.
3. half-bridge driven device as claimed in claim 1 wherein also comprises:
One charge pump circuit is coupled to this output, comprising:
One electric capacity, its first end couples this output; And
One Zener diode, be serially connected in this electric capacity second end and should be with reference between earthed voltage,
Wherein, the end points that couples of this electric capacity and this Zener diode produces an accessory power supply.
4. half-bridge driven device as claimed in claim 3, wherein the end points that couples of this electric capacity and this Zener diode also is coupled to this controller, and the operating voltage of this accessory power supply as this controller is provided.
5. half-bridge driven device as claimed in claim 1 wherein also comprises:
One charge pump circuit is coupled between the path that this output couples this non-zero voltage detector, and this charge pump circuit also is coupled to this non-zero voltage detector and produces on the end points of this non-zero voltage testing result, and this charge pump circuit comprises:
One electric capacity, its first end couples this output, and its second end is coupled to this non-zero voltage detector; And
One Zener diode, second end and this non-zero voltage detector that are serially connected in this electric capacity produce between the end points of this non-zero voltage testing result,
Wherein, the end points that couples of this electric capacity and this Zener diode produces an accessory power supply.
6. half-bridge driven device as claimed in claim 5, wherein the end points that couples of this electric capacity and this Zener diode more is coupled to this controller, and the operating voltage of this accessory power supply as this controller is provided.
7. half-bridge driven device as claimed in claim 1 wherein also comprises:
One guard signal generator couples this non-zero voltage detector, according to judging that this non-zero voltage testing result produces a protection enable signal.
8. half-bridge driven device as claimed in claim 7, wherein this guard signal generator comprises:
One comparator couples this non-zero voltage detector, compares at this non-zero voltage testing result and a preset critical, to produce a comparative result; And
One latch unit couples this comparator with this comparative result of breech lock, and according to being provided this protection enable signal by this comparative result of breech lock.
9. half-bridge driven device as claimed in claim 7; wherein this controller also is coupled to this guard signal generator to receive this protection enable signal; this controller stops the generation action of this driving output voltage according to this protection enable signal, or adjust this first and the frequency of this second control signal.
10. half-bridge driven device as claimed in claim 1, wherein this half-bridge driver comprises:
One the first transistor has first end, second end and control end, and its first termination is received this reference voltage, and its control end receives this first control signal, and its second end couples this output; And
One transistor seconds has first end, second end and control end, and its first end couples this output to receive this reference voltage, and its control end receives this second control signal, and its second termination is received this with reference to earthed voltage.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101107041 | 2012-03-02 | ||
| TW101107041A TWI450480B (en) | 2012-03-02 | 2012-03-02 | Half bridge driving apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN103296914A true CN103296914A (en) | 2013-09-11 |
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| CN2012100639800A Pending CN103296914A (en) | 2012-03-02 | 2012-03-07 | Half-bridge drive device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US5973943A (en) * | 1998-01-05 | 1999-10-26 | International Rectifier Corporation | Non zero-voltage switching protection circuit |
| US6614288B1 (en) * | 1998-05-20 | 2003-09-02 | Astec International Limited | Adaptive drive circuit for zero-voltage and low-voltage switches |
| US20060034123A1 (en) * | 2004-08-02 | 2006-02-16 | Infineon Technologies Ag | Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast |
| CN101803164A (en) * | 2007-09-18 | 2010-08-11 | Nxp股份有限公司 | Control of a half bridge resonant converter for avoiding capacitive mode |
| US7800928B1 (en) * | 2007-12-06 | 2010-09-21 | Universal Lighting Technologies, Inc. | Method of operating a resonant inverter using zero current switching and arbitrary frequency pulse width modulation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ATE348354T1 (en) * | 2000-10-20 | 2007-01-15 | Int Rectifier Corp | BALLAST CONTROL IC WITH POWER FACTOR CORRECTION |
| US6784624B2 (en) * | 2001-12-19 | 2004-08-31 | Nicholas Buonocunto | Electronic ballast system having emergency lighting provisions |
| US7449868B2 (en) * | 2004-12-07 | 2008-11-11 | Fairchild Semiconductor Corporation | Current controlled gate driver for power switches |
| US7876060B2 (en) * | 2008-06-10 | 2011-01-25 | Osram Sylvania Inc. | Multi-lamps instant start electronic ballast |
| TWI420792B (en) * | 2010-02-11 | 2013-12-21 | Delta Electronics Inc | Resonant converters and burst mode control methods thereof |
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2012
- 2012-03-02 TW TW101107041A patent/TWI450480B/en active
- 2012-03-07 CN CN2012100639800A patent/CN103296914A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5973943A (en) * | 1998-01-05 | 1999-10-26 | International Rectifier Corporation | Non zero-voltage switching protection circuit |
| US6614288B1 (en) * | 1998-05-20 | 2003-09-02 | Astec International Limited | Adaptive drive circuit for zero-voltage and low-voltage switches |
| US20060034123A1 (en) * | 2004-08-02 | 2006-02-16 | Infineon Technologies Ag | Method for detection of non-zero-voltage switching operation of a ballast of fluorescent lamps, and ballast |
| CN101803164A (en) * | 2007-09-18 | 2010-08-11 | Nxp股份有限公司 | Control of a half bridge resonant converter for avoiding capacitive mode |
| US7800928B1 (en) * | 2007-12-06 | 2010-09-21 | Universal Lighting Technologies, Inc. | Method of operating a resonant inverter using zero current switching and arbitrary frequency pulse width modulation |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI450480B (en) | 2014-08-21 |
| TW201338375A (en) | 2013-09-16 |
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Application publication date: 20130911 |