CN102695347A - Power supply circuit for electronic ballast control chip - Google Patents
Power supply circuit for electronic ballast control chip Download PDFInfo
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- CN102695347A CN102695347A CN2011100696052A CN201110069605A CN102695347A CN 102695347 A CN102695347 A CN 102695347A CN 2011100696052 A CN2011100696052 A CN 2011100696052A CN 201110069605 A CN201110069605 A CN 201110069605A CN 102695347 A CN102695347 A CN 102695347A
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Abstract
The invention relates to a power supply circuit for an electronic ballast control chip, comprising an EMI filter circuit, a rectifying circuit, a power factor correction circuit, a ballast control circuit, an output-level circuit and a chip power-supply circuit, wherein the input end Net1 of the chip power-supply circuit is connected with the output-level circuit, and is sequentially connected with a coupling capacitance C1 and a rectifier diode D1; the cathode of the rectifier diode D1 is sequentially connected with a rectifier diode D2, a filter capacitance C2, and is respectively connected with an adjusting triode Q1 collector and one end of a resistor R1; the other end of the resistor R1 is respectively connected with the adjusting triode Q1 base, a stabilizing diode Z1 cathode and a stabilizing diode Z2 cathode; the adjusting triode Q1 emitter sequentially is connected with the adjusting triode Q1 base through a current-limiting resistor R2 and the stabilizing diode Z2; and the stabilizing diode Z2 anode is respectively connected with the other end of a resistor R3, an energy storage capacitance C3 anode and an output VCC.
Description
[technical field]
The present invention relates to a kind of circuit of electronic ballast, relate in particular to a kind of power supply circuits of electronic ballast control chip, be applied to the electronic ballast for fluoresent lamp of series resonance working method.
[background technology]
The circuit of electronic ballast of mature and reliable generally all can use professional electronic ballast control chip at present, like L6574D, and IR21592 etc., the pfc circuit of front end adopts the PFC control chip of specialty, chip commonly used such as L6561, UC3854, MC34262 etc.
Yet,, be the key that is related to ballast monolithic stability reliably working for the used chip of electric ballast provides stable power supply.Reliably still cost is too high though adopt special power control circuit, and ballast piece electrical efficient is reduced, and adopts simple power supply circuits can have influence on the reliability of circuit again.
Prior art is as shown in Figure 1; Comprise EMI filter circuit 101, rectification circuit 102, circuit of power factor correction 103, power supply chip 104, ballast control circuit 105 and output-stage circuit 106; It adopts power supply chip; Add peripheral circuit and constitute chip power supply circuit,, also have the auxiliary winding of partial PFC chip power supply power supply employing PFC inductance to supply power for PFC chip and ballast control chip provide power supply.
The shortcoming of foregoing circuit comprise following some:
The first, adopt the power supply chip supply power mode, cost is higher;
The second, after circuit abnormal, though after circuit got into protection through abnormity protection circuit, electric ballast can not damage, PFC chip and ballast control chip still in work, have increased stand-by power consumption;
The 3rd, adopt the power supply chip supply power mode, because the circuit structure complexity increases, ballast piece electrical efficient can reduce.
Therefore, prior art needs to improve.
[summary of the invention]
In view of this, be necessary to propose a kind of power supply circuits of electronic ballast control chip.
A technical scheme of the present invention is, a kind of power supply circuits of electronic ballast control chip, and it comprises EMI filter circuit, rectification circuit, circuit of power factor correction, ballast control circuit, output-stage circuit and chip power supply circuit; EMI filter circuit input current carries out sending to rectification circuit after the filtering; Rectification circuit carries out sending to circuit of power factor correction after the rectification; The output of circuit of power factor correction, the output DC source is to resistance R 3 one ends of output-stage circuit and chip power supply circuit; The output VCC of chip power supply circuit is connected to the power input of circuit of power factor correction and the power input of ballast control circuit; Ballast control circuit is connected to output-stage circuit;
In the chip power supply circuit, its input Net1 is connected with output-stage circuit, and input Net1 connects coupling capacitance C1 one end, and the other end of coupling capacitance C1 is connected with rectifier diode D1 negative electrode, rectifier diode D1 plus earth; Rectifier diode D1 negative electrode also be connected rectifier diode D2 anode and connect, rectifier diode D2 negative electrode is connected filter capacitor C2 minus earth with filter capacitor C2 positive pole; Rectifier diode D1 negative electrode also is connected with resistance R 1 one ends with adjustment triode Q1 collector electrode respectively, and resistance R 1 other end is connected with adjustment triode Q1 base stage, zener diode Z1 negative electrode and zener diode Z2 negative electrode respectively; Zener diode Z1 plus earth; Adjustment triode Q1 emitter connects current-limiting resistance R2, zener diode Z2 anode successively, and the zener diode negative electrode is connected with adjustment triode Q1 base stage; Zener diode Z2 anode also is connected with the output VCC of resistance R 3 other ends, storage capacitor C3 positive pole and chip power supply circuit respectively; Storage capacitor C3 minus earth.
Be applied to such scheme, in the described power supply circuits, output-stage circuit comprises inductance L 1, capacitor C 4, capacitor C 5, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor; The input Net1 of chip power supply circuit is connected with an end, metal-oxide-semiconductor Q3 source electrode and the metal-oxide-semiconductor Q4 drain electrode of the inductance L 1 of output-stage circuit respectively; The output of circuit of power factor correction, the output DC source is to the metal-oxide-semiconductor Q3 drain electrode of output-stage circuit; Metal-oxide-semiconductor Q4 source ground; Output after the other end of inductance L 1 is connected with capacitor C 4.
Be applied to such scheme, in the described power supply circuits, also comprise capacitor C 5, capacitor C 5 one ends connect capacitor C 4 and inductance L 1 successively, other end ground connection, and capacitor C 5 is parallelly connected with external loading.
Be applied to such scheme, in the described power supply circuits, the input Net1 of chip power supply circuit, an end that is connected metal-oxide-semiconductor Q3 source electrode and metal-oxide-semiconductor Q4 drain electrode with 1 of the inductance L of output-stage circuit is connected.
Be applied to above-mentioned scenarios, in the described power supply circuits, adopt the output VCC of the anodal tie point of resistance R 3 other ends and storage capacitor C3 as chip power supply circuit.
Be applied to above-mentioned scenarios, in the described power supply circuits, the output VCC of chip power supply circuit is connected to the power pins VCC of ballast control chip of power pins VCC and ballast control circuit of the PFC control chip of circuit of power factor correction.
Be applied to such scheme, in the described power supply circuits, storage capacitor C3 negative pole also is connected with metal-oxide-semiconductor Q4 source electrode altogether.
Be applied to above-mentioned scenarios, in the described power supply circuits, the output of circuit of power factor correction is output as direct current 400V.
Such scheme through simple discrete component compositing chip power supply circuits, is practiced thrift circuit cost, and when abnormality took place, PFC control chip and ballast control chip quit work, and stand-by power consumption is extremely low, saves energy; Simultaneously, this chip power supply circuit has the function of abnormal protection, in the time of can avoiding circuit to break down effectively, damages ballast, and is safer; Can also realize fluorescent tube protection not on the throne, make electric ballast more reliable; Because of this circuit has the function of abnormal protection, can save the abnormity protection circuit of traditional circuit, can further reduce circuit cost, economic benefit is high.
[description of drawings]
Fig. 1 is the circuit diagram of prior art;
Fig. 2 is the circuit diagram of one embodiment of the invention;
Fig. 3 is the circuit theory sketch map of Fig. 2.
[embodiment]
Below in conjunction with accompanying drawing, specific embodiments of the invention is described in detail.
As shown in Figure 2; One embodiment of the present of invention are; A kind of power supply circuits of electronic ballast control chip, it comprises EMI filter circuit 201, rectification circuit 202, circuit of power factor correction 203, ballast control circuit 205, output-stage circuit 206 and chip power supply circuit 204.As shown in Figure 3, EMI filter circuit 201 inserts power supply, sends to rectification circuit 202 after the filtering, carry out rectification after, send to circuit of power factor correction 203, the output DC source is to chip power supply circuit 204 and output-stage circuit 206; And ballast control circuit 205 also outputs to output-stage circuit 206; Output-stage circuit 206 outputs to chip power supply circuit 204, and chip power supply circuit 204 provides VCC to ballast control circuit 205 and circuit of power factor correction 203.
Wherein, as shown in Figure 2, EMI filter circuit 201 input currents carry out sending to rectification circuit 202 after the filtering; For example, EMI filter circuit 201 inserts the external communications electricity, like the input AC electricity commonly used of 220V etc.Then, carry out rectification via rectification circuit 202 after, send to circuit of power factor correction 203.For example, rectification circuit 202 can adopt bridge diode rectification circuit etc.
Circuit of power factor correction 203 is at its output, and the output DC source is to resistance R 3 one ends of output-stage circuit 206 and chip power supply circuit 204; Circuit of power factor correction 203 can adopt APFC 203 to obtain better output effect, and is preferred, adopts the output VCC of chip power supply circuit 204; For example, with the output VCC of chip power supply circuit 204, be connected to the power pins VCC of the PFC control chip of circuit of power factor correction 203; Like this, both combine, and can realize the power supply effect of present embodiment effectively; When abnormality takes place; The PFC control chip just can in time quit work, and stand-by power consumption is extremely low, with saves energy.Preferably, as shown in Figure 2, the output of circuit of power factor correction 203 is output as direct current 400V.
As shown in Figure 2, the output VCC of chip power supply circuit 204 is connected to the power input of circuit of power factor correction 203 and the power input of ballast control circuit 205; And ballast control circuit 205 is connected to output-stage circuit 206.
Be applied to above-mentioned each example, as shown in Figure 2, in the chip power supply circuit 204, the input Net1 of chip power supply circuit 204 is connected with output-stage circuit 206.
And input Net1 connects coupling capacitance C1 one end, and the coupling capacitance C1 other end is connected with rectifier diode D1 negative electrode, and, rectifier diode D1 plus earth.
Simultaneously, rectifier diode D1 negative electrode also is connected with rectifier diode D2 anode, and rectifier diode D2 negative electrode is connected with filter capacitor C2 is anodal, and, filter capacitor C2 minus earth.
Simultaneously, rectifier diode D1 negative electrode also is connected with resistance R 1 one ends with adjustment triode Q1 collector electrode respectively, and resistance R 1 other end is connected with adjustment triode Q1 base stage, zener diode Z1 negative electrode and zener diode Z2 negative electrode respectively; And, zener diode Z1 plus earth.
Adjustment triode Q1 emitter connects current-limiting resistance R2, zener diode Z2 anode successively, and zener diode Z2 negative electrode is connected with adjustment triode Q1 base stage; And zener diode Z2 anode also is connected with the output VCC of resistance R 3 other ends, storage capacitor C3 positive pole and chip power supply circuit 204 respectively; Storage capacitor C3 minus earth.For example, zener diode Z1 negative electrode connects with after filter capacitor C2 negative pole is connected altogether.Preferably, storage capacitor C3 negative pole is connected with filter capacitor C2 and rectifier diode D1 anode altogether.
Be applied to above-mentioned each example, preferred, as shown in Figure 2, in the described power supply circuits, output-stage circuit 206 comprises inductance L 1, capacitor C 4, capacitor C 5, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor; The input Net1 of chip power supply circuit 204 is connected with an end, metal-oxide-semiconductor Q3 source electrode and the metal-oxide-semiconductor Q4 drain electrode of the inductance L 1 of output-stage circuit 206 respectively; Circuit of power factor correction is at its output, and the output DC source is to the metal-oxide-semiconductor Q3 drain electrode of output-stage circuit 206; Metal-oxide-semiconductor Q4 source ground; Output after the other end of inductance L 1 is connected with capacitor C 4.For example, the other end of inductance L 1 is series capacitance C4, capacitor C 5 successively, and capacitor C 5 is parallelly connected with external loading.Preferably, the input Net1 of chip power supply circuit 204, an end that is connected metal-oxide-semiconductor Q3 source electrode and metal-oxide-semiconductor Q4 drain electrode with 1 of the inductance L of output-stage circuit 206 is connected.
Be applied to above-mentioned each example, preferred, in the described power supply circuits, adopt the output VCC of the anodal tie point of resistance R 3 other ends and storage capacitor C3 as chip power supply circuit 204.Another example is; In the described power supply circuits; The output VCC of chip power supply circuit 204 is connected to the power pins VCC of ballast control chip of power pins VCC and ballast control circuit 205 of the PFC control chip of circuit of power factor correction 203.
Be applied to above-mentioned each example, preferred, in the described power supply circuits, zener diode Z1 negative electrode connects with after filter capacitor C2 negative pole is connected altogether.And for example, storage capacitor C3 negative pole is connected with filter capacitor C2 and rectifier diode D1 anode altogether.Perhaps, storage capacitor C3 negative pole also is connected with metal-oxide-semiconductor Q4 source electrode altogether.An example is that all earth elements all connect altogether, in the concrete product of realizing, help wiring setting like this.
Above-mentioned each example need not be used abnormity protection circuit, has solved prior art and has adopted power supply chip supply power mode, cost problem of higher; Also solved after circuit abnormal, still in work, there are higher stand-by power consumption problem in PFC chip and ballast control chip; Combine accompanying drawing below again, further structure of the present invention and function are described through embodiment.
As shown in Figure 2; Present embodiment comprises 6 parts; Comprise EMI filter circuit 201, rectification circuit 202, circuit of power factor correction 203, ballast control circuit 205, output-stage circuit 206 and chip power supply circuit 204, key point is the improvement of chip power supply circuit 204.For example, the AC220V civil power to rectification circuit 202, arrives circuit of power factor correction 203 through EMI filter circuit 201 again, becomes direct current 400V.Direct current 400V is as the input of the Q3 of output-stage circuit 206 drain electrode d, and the input of R3 in the chip power supply circuit 204.And ballast control circuit 205 is connected to output-stage circuit 206; The output stage VCC of chip power supply circuit 204 is connected to the power pins VCC of PFC control chip and ballast control chip; The input Net1 of chip power supply circuit 204 is connected to the common intersection of drain electrode d of source electrode s and Q4 of inductance L 1 and the Q3 of output-stage circuit 206; The input termination coupling capacitance C1 of chip power supply circuit 204, another pin of C1 links to each other the D1 plus earth with rectifier diode D1 negative electrode with the D2 anode.The D2 negative electrode links to each other with filter capacitor C2 is anodal, is connected in the collector electrode of adjustment pipe Q1 and the end of R1 simultaneously, the minus earth of filter capacitor C2.The base stage of adjustment pipe links to each other with the other end of R1, connects the negative electrode of zener diode Z1 and Z2 simultaneously, the plus earth of voltage-stabiliser tube Z1.The emitter of adjustment pipe Q1 links to each other with current-limiting resistance R2 one end, and the other end of R2 links to each other with the anode of voltage-stabiliser tube Z2, is connected to the intersection point of resistance R 3 and storage capacitor C3 simultaneously, and this is as the output VCC of chip power supply circuit 204.Storage capacitor C3 minus earth, the output of another termination power factor correction circuit of R3.
Above-mentioned each example of the present invention; The chip power supply circuit of forming by several discrete components through ingenious setting 204; Not only solved employing power supply chip supply power mode, the cost problem of higher has also solved after circuit abnormal; Still in work, there are higher stand-by power consumption problem in PFC chip and ballast control chip; Can also realize simultaneously the function of abnormal protection, can save the abnormity protection circuit of traditional circuit, further reduce cost.If do not remove abnormity protection circuit then constitute duplicate protection, make circuit of electronic ballast more safe and reliable.Its operation principle specifies as follows: when circuit is connected the 220V alternating current, do not work as yet at powered on moment PFC control chip and ballast control chip, the voltage of the output of power factor correction circuit approaches rectification circuit 202 output voltage 311V at this moment; This voltage is storage capacitor C3 charging through current-limiting resistance R3; Rise to the threshold voltage of PFC control chip and ballast control chip when storage capacitor C3 voltage after, PFC control chip and the moment startup of ballast control chip, half-bridge inversion circuit Q3 and Q4 are reverse into sinusoidal ac with direct voltage; Offer resonant inductance L1; Series resonant circuit produces vibration, and the sinusoidal ac of Net1 is coupled capacitor C 1 coupling, through diode D1, diode D2 rectification; Become half-wave, through becoming direct current after capacitor C 2 filtering.Adjustment pipe Q1 and resistance R 1 and voltage-stabiliser tube Z1 form linear voltage-stabilizing circuit, and output voltage values equals the be junction voltage that voltage-stabiliser tube Z1 value deducts adjustment pipe Q1.Adjustment pipe output voltage provides stable power for PFC control chip and ballast control chip after through current-limiting resistance R2.PFC control chip and ballast control chip begin steady operation, normally light fluorescent tube.This moment, the Net1 inverter voltage waveform of ordering tended towards stability, and chip power supply circuit 204 also begins steady operation, and is continuous for PFC control chip and ballast control chip provide power supply, as shown in Figures 2 and 3.
If output stage breaks down in powered on moment or work, when opening a way, for example do not connect fluorescent tube or fluorescent tube breaks off suddenly such as fluorescent tube; The series resonant circuit Net1 generation high voltage pulse of naming a person for a particular job then, this high pressure moment inputs to voltage stabilizing circuit after being coupled capacitive coupling, and voltage stabilizing circuit causes output current moment to increase because voltage raises; Current-limiting resistance R2 is because electric current is excessive, and pressure drop moment is elevated, and causes the emitter voltage of triode Q1 to be raised by moment; But the base voltage of triode Q1 is by zener diode Z2 pressure limiting; When the emitter voltage of triode Q1 exceeds base voltage, voltage stabilizing circuit quits work, and this moment, VCC voltage was not dragged down because of there being the supply supply voltage; Be lower than the threshold voltage of PFC control chip and ballast control chip, two chip blocks quit work.And then cause half-bridge inversion circuit to quit work again, and at this moment Net1 point inverter voltage disappears, the coupling of coupling capacitance no-voltage, and chip power supply circuit 204 also will quit work reliably.Circuit is protected by safety.Therefore, PFC control chip and ballast control chip quit work during owing to the generation abnormality, so stand-by power consumption is extremely low.Power supply circuits have abnormity protection function in addition, can replace the independent abnormity protection circuit of traditional circuit.
The present invention can realize following effect: 1, through simple discrete component compositing chip power supply circuits 204, practice thrift circuit cost through the topological structure of circuit of electronic ballast and concrete chip power supply circuit 204 designs; PFC control chip and ballast control chip quit work when 2, abnormality taking place, and stand-by power consumption is extremely low, saves energy; 3, this chip power supply circuit 204 has the function of abnormal protection, in the time of can avoiding circuit to break down effectively, damages ballast, and is safer; 4, can realize fluorescent tube protection not on the throne through this circuit, make electric ballast more reliable; 5, the function that has abnormal protection because of this circuit can be saved the abnormity protection circuit of traditional circuit, can further reduce circuit cost.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention; And, each technical characterictic of listing above, it makes up each embodiment that can form each other, should be regarded as the scope that belongs to specification record of the present invention.For the person of ordinary skill of the art, under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. the power supply circuits of an electronic ballast control chip is characterized in that, comprise EMI filter circuit, rectification circuit, circuit of power factor correction, ballast control circuit, output-stage circuit and chip power supply circuit;
EMI filter circuit input current carries out sending to rectification circuit after the filtering;
Rectification circuit carries out sending to circuit of power factor correction after the rectification;
The output of circuit of power factor correction, the output DC source is to resistance R 3 one ends of output-stage circuit and chip power supply circuit;
The output VCC of chip power supply circuit is connected to the power input of circuit of power factor correction and the power input of ballast control circuit;
Ballast control circuit is connected to output-stage circuit;
In the chip power supply circuit,
Its input Net1 is connected with output-stage circuit, and input Net1 connects coupling capacitance C1 one end, and the other end of coupling capacitance C1 is connected with rectifier diode D1 negative electrode, rectifier diode D1 plus earth;
Rectifier diode D1 negative electrode also is connected with rectifier diode D2 anode, and rectifier diode D2 negative electrode is connected filter capacitor C2 minus earth with filter capacitor C2 is anodal;
Rectifier diode D2 negative electrode also is connected with resistance R 1 one ends with adjustment triode Q1 collector electrode respectively, and resistance R 1 other end is connected with adjustment triode Q1 base stage, zener diode Z1 negative electrode and zener diode Z2 negative electrode respectively;
Zener diode Z1 plus earth;
Adjustment triode Q1 emitter connects the end of current-limiting resistance R2, the other end of current-limiting resistance R2 connects zener diode Z2 anode, and zener diode Z2 negative electrode is connected with adjustment triode Q1 base stage;
Zener diode Z2 anode also is connected with the output VCC of resistance R 3 other ends, storage capacitor C3 positive pole and chip power supply circuit respectively;
Storage capacitor C3 minus earth.
2. power supply circuits according to claim 1 is characterized in that, output-stage circuit comprises inductance L 1, capacitor C 4, metal-oxide-semiconductor Q3 and metal-oxide-semiconductor Q4;
The input Net1 of chip power supply circuit is connected with an end, metal-oxide-semiconductor Q3 source electrode and the metal-oxide-semiconductor Q4 drain electrode of the inductance L 1 of output-stage circuit respectively;
The output of circuit of power factor correction, the output DC source is to the metal-oxide-semiconductor Q3 drain electrode of output-stage circuit;
Metal-oxide-semiconductor Q4 source ground;
Output after the other end of inductance L 1 is connected with capacitor C 4.
3. power supply circuits according to claim 2 is characterized in that output-stage circuit also comprises capacitor C 5, and capacitor C 5 one ends are connected with an end of capacitor C 4, other end ground connection, and capacitor C 5 is parallelly connected with external loading.
4. power supply circuits according to claim 3 is characterized in that, the input Net1 of chip power supply circuit, and an end that is connected metal-oxide-semiconductor Q3 source electrode and metal-oxide-semiconductor Q4 drain electrode with 1 of the inductance L of output-stage circuit is connected.
5. power supply circuits according to claim 1 is characterized in that, adopt the output VCC of the anodal tie point of resistance R 3 other ends and storage capacitor C3 as chip power supply circuit.
6. power supply circuits according to claim 5; It is characterized in that; The output VCC of chip power supply circuit is connected to the power pins VCC of ballast control chip of power pins VCC and ballast control circuit of the PFC control chip of circuit of power factor correction.
7. power supply circuits according to claim 1 is characterized in that, zener diode Z1 negative electrode connects with after filter capacitor C2 negative pole is connected altogether.
8. power supply circuits according to claim 7 is characterized in that, storage capacitor C3 negative pole is connected with filter capacitor C2 and rectifier diode D1 anode altogether.
9. power supply circuits according to claim 8 is characterized in that, storage capacitor C3 negative pole also is connected with metal-oxide-semiconductor Q4 source electrode altogether.
10. according to the arbitrary described power supply circuits of claim 1 to 9, it is characterized in that the output of circuit of power factor correction is output as direct current 400V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110069605.2A CN102695347B (en) | 2011-03-22 | 2011-03-22 | Power supply circuit for electronic ballast control chip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110069605.2A CN102695347B (en) | 2011-03-22 | 2011-03-22 | Power supply circuit for electronic ballast control chip |
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| CN102695347A true CN102695347A (en) | 2012-09-26 |
| CN102695347B CN102695347B (en) | 2014-05-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110069605.2A Expired - Fee Related CN102695347B (en) | 2011-03-22 | 2011-03-22 | Power supply circuit for electronic ballast control chip |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103313496A (en) * | 2013-06-17 | 2013-09-18 | 武汉迪奥尔照明有限责任公司 | High-performance low-distortion electronic ballast |
| CN103327710A (en) * | 2013-04-15 | 2013-09-25 | 张根清 | Solar energy power source injection locking power synthesis light-dimmer electrodeless lamp |
| CN109861217A (en) * | 2019-03-13 | 2019-06-07 | 上海源微电子科技有限公司 | A kind of novel chip power supply circuit |
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| CN101772250A (en) * | 2010-02-08 | 2010-07-07 | 海洋王照明科技股份有限公司 | Dimmable electronic ballast |
| CN101945524A (en) * | 2010-09-29 | 2011-01-12 | 海洋王照明科技股份有限公司 | Electronic ballast and lamp |
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| CN1430458A (en) * | 2001-12-19 | 2003-07-16 | 尼古拉斯·伯埃诺肯托 | Electronic ballast system with emergency lighting apparatus |
| US20030146714A1 (en) * | 2001-12-19 | 2003-08-07 | Nicholas Buonocunto | Electronic ballast system having emergency lighting provisions |
| TW200926898A (en) * | 2007-12-12 | 2009-06-16 | World Light Lighting Technology Co Ltd | Electronic ballast with a stable preheat circuit |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103327710A (en) * | 2013-04-15 | 2013-09-25 | 张根清 | Solar energy power source injection locking power synthesis light-dimmer electrodeless lamp |
| CN103327710B (en) * | 2013-04-15 | 2015-02-18 | 张根清 | Solar energy power source injection locking power synthesis light-dimmer electrodeless lamp |
| CN103313496A (en) * | 2013-06-17 | 2013-09-18 | 武汉迪奥尔照明有限责任公司 | High-performance low-distortion electronic ballast |
| CN103313496B (en) * | 2013-06-17 | 2016-01-20 | 武汉迪奥尔照明有限责任公司 | A kind of high-performance low distortion electronic ballast |
| CN109861217A (en) * | 2019-03-13 | 2019-06-07 | 上海源微电子科技有限公司 | A kind of novel chip power supply circuit |
| CN109861217B (en) * | 2019-03-13 | 2022-08-19 | 上海源微电子科技有限公司 | Novel chip power supply circuit |
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| Publication number | Publication date |
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| CN102695347B (en) | 2014-05-21 |
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