CN104968134A - Noise-filter-type ballast based on switch power amplification circuit - Google Patents

Noise-filter-type ballast based on switch power amplification circuit Download PDF

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Publication number
CN104968134A
CN104968134A CN201510334583.6A CN201510334583A CN104968134A CN 104968134 A CN104968134 A CN 104968134A CN 201510334583 A CN201510334583 A CN 201510334583A CN 104968134 A CN104968134 A CN 104968134A
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China
Prior art keywords
power amplifier
resistance
triode
output
negative input
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Pending
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CN201510334583.6A
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Inventor
周小玲
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CHENGDU WEIBANG SCIENCE AND TECHNOLOGY Co Ltd
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CHENGDU WEIBANG SCIENCE AND TECHNOLOGY Co Ltd
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Priority to CN201510334583.6A priority Critical patent/CN104968134A/en
Publication of CN104968134A publication Critical patent/CN104968134A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/36—Means for starting or stopping converters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)

Abstract

The invention discloses a noise-filter-type ballast based on a switch power amplification circuit. The noise-filter-type ballast is characterized in that the noise-filter-type ballast is formed by a triode Q4, a transformer T, a drive chip M, a switch current source, a diode D1, a capacitor C3, a resistor R7, a capacitor C4, a capacitor C5, the switch power amplifier circuit and a noise-reduction filter circuit. The noise-filter-type ballast is provided with the switch power amplifier circuit, thereby ensuring that power signals input to the drive chip M does not attenuate, and ensuring integral performance stabilization. Meanwhile, the noise-filter-type ballast is provided with the noise-reduction filter circuit which can carry out filtering processing on the working current, the filtering effect thereof is obvious, and the current noise can be reduced effectively.

Description

A kind of noise filtering formula ballast based on switch power amplifying circuit
Technical field
The present invention relates to a kind of ballast, specifically refer to a kind of noise filtering formula ballast based on switch power amplifying circuit.
Background technology
Along with the development of society, people require also more and more higher to the illuminating effect of fluorescent lamp in life.In order to reach the demand of people, start to have occurred ballast in the later stage eighties 20th century.At present; ballast has been widely used on fluorescent lamp; it can make input current be stabilized within the scope of the rated current of fluorescent tube; and the voltage of lamp tube ends is also stabilized in specified operating voltage range; play the effect of step-down current limliting; not only protect fluorescent lamp, also make the illuminating effect of fluorescent lamp better.But, when fluorescent lamp operationally, ballast has electric current to pass through all the time, and after working long hours, ballast then can send very large current noise, brings very large puzzlement.
Summary of the invention
The object of the invention is to overcome traditional ballast ballast after working long hours and then can send the defect of very large current noise, a kind of noise filtering formula ballast based on switch power amplifying circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of noise filtering formula ballast based on switch power amplifying circuit, it is by switched current source, transformer T, driving chip M, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C3 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R7 between the TG pin of driving chip M and TS pin, be serially connected with the switch power amplifying circuit between switched current source and driving chip M, base stage is connected with the TG pin of driving chip M, collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, and the triode Q4 of grounded emitter, and the noise reduction filtering circuit be arranged between the non-same polarity of primary coil of transformer T and the emitter of triode Q4 forms.
Further, described noise reduction filtering circuit is by power amplifier P4, power amplifier P5, power amplifier P6, power amplifier P7, positive pole is connected with the negative input of power amplifier P4 after resistance R18, the polar capacitor C11 that negative pole is then connected with the output of power amplifier P5, negative pole is connected with the negative input of power amplifier P4, the polar capacitor C12 that positive pole is then connected with the output of power amplifier P5 after resistance R17, one end is connected with the output of power amplifier P4, the other end is the resistance R20 of ground connection after resistance R19 then, N pole is connected with the output of power amplifier P4, P pole is the diode D3 of ground connection after resistance R21 then, one end is connected with the output of power amplifier P4, the resistance R22 that the other end is then connected with the negative input of power amplifier P6 after resistance R24, negative pole is connected with the negative input of power amplifier P6, the polar capacitor C14 that positive pole is then connected with the output of power amplifier P7 after resistance R23, positive pole is connected with the tie point of resistance R24 with resistance R22, the polar capacitor C13 that negative pole is then connected with the output of power amplifier P7, and one end is connected with the output of power amplifier P6, the other end then after resistance R26 the resistance R25 of ground connection form, the electrode input end of described power amplifier P4, power amplifier P5, power amplifier P6 and power amplifier P7 is all connected with its output, the negative input of power amplifier P5 is then connected with the tie point of resistance R19 with resistance R20, and the negative input of power amplifier P7 is then connected with the tie point of resistance R26 with resistance R25, the positive pole of described polar capacitor C11 then forms the input of this noise reduction filtering circuit, this input is connected with the emitter of triode Q4, the output of power amplifier P6 then forms the output of this noise reduction filtering circuit, and this output is then connected with the non-same polarity of the primary coil of transformer T.
Described switch power amplifying circuit is then by power amplifier P1, power amplifier P2, power amplifier P3, be serially connected in the resistance R9 between the output of power amplifier P1 and negative input and electric capacity C6, be serially connected in the resistance R10 between the output of power amplifier P2 and electrode input end and electric capacity C7, base stage is connected with the output of power amplifier P1, the triode Q5 that collector electrode is connected with the electrode input end of power amplifier P3 after resistance R11, base stage is connected with the emitter of triode Q5, the triode Q6 that collector electrode is connected with the negative input of power amplifier P3 after resistance R12, base stage is connected with the output of power amplifier P2 after resistance R14, the triode Q7 that collector electrode is connected with the base stage of triode Q6 after resistance R13, positive pole is connected with the negative input of power amplifier P3, and negative pole is connected with the emitter of triode Q6 and the electric capacity C8 of ground connection, the electric capacity C9 be in parallel with resistance R14, one end is connected with the base stage of triode Q7, the resistance R15 of the external-4V voltage of the other end, one end is connected with the emitter of triode Q7, the resistance R16 of the external-4V voltage of the other end, the electric capacity C10 be in parallel with resistance R16, and N pole is connected with the collector electrode of triode Q5, the diode D2 of the extremely external-4V voltage of P forms, the negative input of described power amplifier P1 is connected with the electrode input end of power amplifier P2, the output of power amplifier P3 is connected with the VCC pin of driving chip M, the collector electrode of triode Q7 is connected with the INP pin of driving chip M, and the electrode input end of power amplifier P1 is then all connected with switched current source with the negative input of power amplifier P2.
The Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, the emitter of triode Q4 is also connected with the TS pin of driving chip M, the Same Name of Ends of the secondary coil of described transformer T forms the output of ballast together with non-same polarity, and this output then connects fluorescent lamp.
Described switched current source is by triode Q1, triode Q2, triode Q3, be serially connected in the resistance R1 between the collector electrode of triode Q1 and the collector electrode of triode Q2, RC filter circuit between the negative input being serially connected in the emitter power amplifier P2 of triode Q1, be serially connected in the resistance R2 between the base stage of triode Q1 and the negative input of power amplifier P2, one end is connected with the emitter of triode Q2, the resistance R5 of the other end then and between the negative input of power amplifier P2, one end is connected with the emitter of triode Q3, the resistance R6 that the other end is then connected with the negative input of power amplifier P2, be serially connected in the resistance R4 between the collector electrode of triode Q3 and the collector electrode of triode Q2, and positive pole is connected with the collector electrode of triode Q2, the polar capacitor C2 that negative pole is connected with the negative input of power amplifier P2 forms, the base stage of described triode Q2 is also connected with the collector electrode of triode Q1, and the base stage of triode Q3 is then connected with the emitter of triode Q2, the positive pole of described polar capacitor C2 is also connected with the electrode input end of power amplifier P1.
For guaranteeing result of use, described driving chip M preferentially adopts LTC4440A integrated chip to realize.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention not only has the function of short-circuit protection, overvoltage protection and open-circuit-protection, and its power consumption is lower, and its start-up time is fast.
(2) the present invention is provided with switch power amplifying circuit, therefore can guarantee that the power signal in input queued switches chip M can not produce decay, and then guarantees overall stable performance.
(3) the present invention is provided with noise reduction filtering circuit, and it can do filtering process to operating current, and its filter effect is remarkable, can effectively reduce current noise of the present invention.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is noise reduction filtering electrical block diagram of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, the present invention is by triode Q4, transformer T, driving chip M, switched current source, diode D1, electric capacity C3, resistance R7, electric capacity C4, electric capacity C5, and switch power amplifying circuit and noise reduction filtering circuit form.During connection, the output of switched current source needs to be connected with the input of switch power amplifying circuit, and the output of switch power amplifying circuit then needs to be connected with driving chip M.Described diode D1 is serially connected with between the VCC pin of driving chip M and BOOST pin, to guarantee that its foreign current can not cause damage to driving chip M when transformer T damages.Electric capacity C3 is serially connected with between the BOOST pin of driving chip M and TG pin, and resistance R7 is then serially connected with between the TG pin of driving chip M and TS pin.
The base stage of described triode Q4 is connected with the TG pin of driving chip M, and its collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, its grounded emitter.Meanwhile, the collector electrode of this triode Q4 also needs the driving voltage of external+6V, to guarantee that triode Q4 can normally run.
Wherein, the Same Name of Ends of the primary coil of transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, its non-same polarity is then connected with the emitter of triode Q4 after noise reduction filtering circuit, and the indirect fluorescent lamp of the Same Name of Ends of the secondary coil of transformer T and non-same polarity.Meanwhile, the emitter of triode Q4 is also connected with the TS pin of driving chip M.
Described switch power amplifying circuit, it is by power amplifier P1, power amplifier P2, power amplifier P3, triode Q5, triode Q6, triode Q7, be serially connected in the one-level RC filter circuit between the output of power amplifier P1 and negative input, be serially connected in the secondary RC filter circuit between the output of power amplifier P2 and electrode input end, and resistance R11, resistance R12, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C8, electric capacity C9, electric capacity C10 and diode D2 form.
Wherein, described one-level RC filtered electrical routing resistance R9 and electric capacity C6 is formed in parallel, namely between resistance R9 and the electric capacity C6 negative input that is all serially connected in power amplifier P1 and output; Described secondary RC filter circuit is then formed in parallel by resistance R10 and electric capacity C7, namely between resistance R10 and the electric capacity C7 electrode input end that is all serially connected in power amplifier P2 and output.Meanwhile, the negative input of power amplifier P1 is also connected with the electrode input end of power amplifier P2.
The base stage of triode Q5 is connected with the output of power amplifier P1, and its collector electrode is connected with the electrode input end of power amplifier P3 after resistance R11, and its emitter is then connected with the base stage of triode Q6; The collector electrode of triode Q6 is connected with the negative input of power amplifier P3 after resistance R12, meanwhile, and the collector electrode also external+10V voltage of this triode Q6.
The base stage of triode Q7 is connected with the output of power amplifier P2 after resistance R14, and its collector electrode is then connected with the base stage of triode Q6 after resistance R13.Electric capacity C9 is then in parallel with resistance R14, and for guaranteeing effect, this electric capacity C9 preferentially adopts electrochemical capacitor to realize.During connection, the negative pole of electric capacity C9 is connected with the base stage of triode Q7, and its positive pole is then connected with the output of power amplifier P2.The positive pole of electric capacity C8 is connected with the negative input of power amplifier P3, and its negative pole is then connected with the emitter of triode Q6.Meanwhile, the negative pole of this electric capacity C8 and the equal ground connection of emitter of triode Q6.
One end of resistance R15 is connected with the base stage of triode Q7, the voltage of the external-4V of its other end; And one end of resistance R16 is connected with the emitter of triode Q7, the voltage of its other end then external equally-4V.Electric capacity C10 is then in parallel with resistance R16.Equally, described electric capacity C10 and electric capacity C8 also all adopts electrochemical capacitor to realize.
The N pole of described diode D2 is connected with the collector electrode of triode Q5, and its P pole is at the voltage of external-4V.For guaranteeing the normal operation of power amplifier P1 and power amplifier P2, this electric capacity C6 and electric capacity C7 all preferentially adopts patch capacitor to realize.
Described switched current source is by triode Q1, triode Q2, triode Q3, be serially connected in the resistance R1 between the collector electrode of triode Q1 and the collector electrode of triode Q2, be serially connected in the RC filter circuit between the emitter of triode Q1 and the negative input of power amplifier P2, be serially connected in the resistance R2 between the base stage of triode Q1 and the negative input of power amplifier P2, one end is connected with the emitter of triode Q2, the resistance R5 that the other end is then connected with the negative input of power amplifier P2, be serially connected in the resistance R6 between the emitter of triode Q3 and the negative input of power amplifier P2, be serially connected in the resistance R4 between the collector electrode of triode Q3 and the collector electrode of triode Q2, and positive pole is connected with the collector electrode of triode Q2, the polar capacitor C2 that negative pole is connected with the negative input of power amplifier P2 forms.
Meanwhile, the base stage of this triode Q2 is also connected with the collector electrode of triode Q1, and the base stage of triode Q3 is then connected with the emitter of triode Q2.The positive pole of described polar capacitor C2 will be connected with the electrode input end of power amplifier P1.
Described RC filter circuit is then formed in parallel by resistance R3 and electric capacity C1, and namely after resistance R3 and electric capacity C1 parallel connection, an one common port is connected with the emitter of triode Q1, its another common port is then connected with the negative input of power amplifier P2.
Described noise reduction filtering circuit structure as shown in Figure 2, it is by power amplifier P4, power amplifier P5, power amplifier P6, power amplifier P7, positive pole is connected with the negative input of power amplifier P4 after resistance R18, the polar capacitor C11 that negative pole is then connected with the output of power amplifier P5, negative pole is connected with the negative input of power amplifier P4, the polar capacitor C12 that positive pole is then connected with the output of power amplifier P5 after resistance R17, one end is connected with the output of power amplifier P4, the other end is the resistance R20 of ground connection after resistance R19 then, N pole is connected with the output of power amplifier P4, P pole is the diode D3 of ground connection after resistance R21 then, one end is connected with the output of power amplifier P4, the resistance R22 that the other end is then connected with the negative input of power amplifier P6 after resistance R24, negative pole is connected with the negative input of power amplifier P6, the polar capacitor C14 that positive pole is then connected with the output of power amplifier P7 after resistance R23, positive pole is connected with the tie point of resistance R24 with resistance R22, the polar capacitor C13 that negative pole is then connected with the output of power amplifier P7, and one end is connected with the output of power amplifier P6, the other end then after resistance R26 the resistance R25 of ground connection form.
During connection, the electrode input end of this power amplifier P4, power amplifier P5, power amplifier P6 and power amplifier P7 is all connected with its output, the negative input of power amplifier P5 is then connected with the tie point of resistance R19 with resistance R20, and the negative input of power amplifier P7 is then connected with the tie point of resistance R26 with resistance R25.Thus, this noise reduction filtering circuit then with resistance R22 and resistance R21 and diode D3 for separating, form two symmetrical noise filters, this structure can make filter effect more thorough.
Simultaneously, the positive pole of this polar capacitor C11 then forms the input of this noise reduction filtering circuit, this input is connected with the emitter of triode Q4, the output of power amplifier P6 then forms the output of this noise reduction filtering circuit, and this output is then connected with the non-same polarity of the primary coil of transformer T.
For guaranteeing result of use, the high-frequency N-channel MOS FET grid drive chip that this driving chip M preferentially adopts Linear Techn Inc. to produce, i.e. LTC4440A integrated chip.This driving chip can with the input voltage work up to 80V, up to can continuous operation during 100V transient state.
As mentioned above, just the present invention can well be realized.

Claims (4)

1. the noise filtering formula ballast based on switch power amplifying circuit, it is by switched current source, transformer T, driving chip M, be serially connected with the diode D1 between the VCC pin of driving chip M and BOOST pin, be serially connected with the electric capacity C3 between the BOOST pin of driving chip M and TG pin, be serially connected with the resistance R7 between the TG pin of driving chip M and TS pin, be serially connected with the switch power amplifying circuit between switched current source and driving chip M, and base stage is connected with the TG pin of driving chip M, collector electrode is ground connection after electric capacity C4 and electric capacity C5 in turn, and the triode Q4 of grounded emitter forms, it is characterized in that, between the non-same polarity and the emitter of triode Q4 of the primary coil of transformer T, be also provided with noise reduction filtering circuit, described noise reduction filtering circuit is by power amplifier P4, power amplifier P5, power amplifier P6, power amplifier P7, positive pole is connected with the negative input of power amplifier P4 after resistance R18, the polar capacitor C11 that negative pole is then connected with the output of power amplifier P5, negative pole is connected with the negative input of power amplifier P4, the polar capacitor C12 that positive pole is then connected with the output of power amplifier P5 after resistance R17, one end is connected with the output of power amplifier P4, the other end is the resistance R20 of ground connection after resistance R19 then, N pole is connected with the output of power amplifier P4, P pole is the diode D3 of ground connection after resistance R21 then, one end is connected with the output of power amplifier P4, the resistance R22 that the other end is then connected with the negative input of power amplifier P6 after resistance R24, negative pole is connected with the negative input of power amplifier P6, the polar capacitor C14 that positive pole is then connected with the output of power amplifier P7 after resistance R23, positive pole is connected with the tie point of resistance R24 with resistance R22, the polar capacitor C13 that negative pole is then connected with the output of power amplifier P7, and one end is connected with the output of power amplifier P6, the other end then after resistance R26 the resistance R25 of ground connection form, the electrode input end of described power amplifier P4, power amplifier P5, power amplifier P6 and power amplifier P7 is all connected with its output, the negative input of power amplifier P5 is then connected with the tie point of resistance R19 with resistance R20, and the negative input of power amplifier P7 is then connected with the tie point of resistance R26 with resistance R25, the positive pole of described polar capacitor C11 then forms the input of this noise reduction filtering circuit, this input is connected with the emitter of triode Q4, the output of power amplifier P6 then forms the output of this noise reduction filtering circuit, and this output is then connected with the non-same polarity of the primary coil of transformer T,
Described switch power amplifying circuit is then by power amplifier P1, power amplifier P2, power amplifier P3, be serially connected in the resistance R9 between the output of power amplifier P1 and negative input and electric capacity C6, be serially connected in the resistance R10 between the output of power amplifier P2 and electrode input end and electric capacity C7, base stage is connected with the output of power amplifier P1, the triode Q5 that collector electrode is connected with the electrode input end of power amplifier P3 after resistance R11, base stage is connected with the emitter of triode Q5, the triode Q6 that collector electrode is connected with the negative input of power amplifier P3 after resistance R12, base stage is connected with the output of power amplifier P2 after resistance R14, the triode Q7 that collector electrode is connected with the base stage of triode Q6 after resistance R13, positive pole is connected with the negative input of power amplifier P3, and negative pole is connected with the emitter of triode Q6 and the electric capacity C8 of ground connection, the electric capacity C9 be in parallel with resistance R14, one end is connected with the base stage of triode Q7, the resistance R15 of the external-4V voltage of the other end, one end is connected with the emitter of triode Q7, the resistance R16 of the external-4V voltage of the other end, the electric capacity C10 be in parallel with resistance R16, and N pole is connected with the collector electrode of triode Q5, the diode D2 of the extremely external-4V voltage of P forms, the negative input of described power amplifier P1 is connected with the electrode input end of power amplifier P2, the output of power amplifier P3 is connected with the VCC pin of driving chip M, the collector electrode of triode Q7 is connected with the INP pin of driving chip M, and the electrode input end of power amplifier P1 is then all connected with switched current source with the negative input of power amplifier P2.
2. a kind of noise filtering formula ballast based on switch power amplifying circuit according to claim 1, it is characterized in that, the Same Name of Ends of the primary coil of described transformer T is connected with the tie point of electric capacity C5 with electric capacity C4, the emitter of triode Q4 is also connected with the TS pin of driving chip M, the Same Name of Ends of the secondary coil of described transformer T forms the output of ballast together with non-same polarity, and this output then connects fluorescent lamp.
3. a kind of noise filtering formula ballast based on switch power amplifying circuit according to claim 2, it is characterized in that, described switched current source is by triode Q1, triode Q2, triode Q3, be serially connected in the resistance R1 between the collector electrode of triode Q1 and the collector electrode of triode Q2, RC filter circuit between the negative input being serially connected in the emitter power amplifier P2 of triode Q1, be serially connected in the resistance R2 between the base stage of triode Q1 and the negative input of power amplifier P2, one end is connected with the emitter of triode Q2, the resistance R5 of the other end then and between the negative input of power amplifier P2, one end is connected with the emitter of triode Q3, the resistance R6 that the other end is then connected with the negative input of power amplifier P2, be serially connected in the resistance R4 between the collector electrode of triode Q3 and the collector electrode of triode Q2, and positive pole is connected with the collector electrode of triode Q2, the polar capacitor C2 that negative pole is connected with the negative input of power amplifier P2 forms, the base stage of described triode Q2 is also connected with the collector electrode of triode Q1, and the base stage of triode Q3 is then connected with the emitter of triode Q2, the positive pole of described polar capacitor C2 is also connected with the electrode input end of power amplifier P1.
4. a kind of noise filtering formula ballast based on switch power amplifying circuit according to any one of claims 1 to 3, it is characterized in that, described driving chip M is LTC4440A integrated chip.
CN201510334583.6A 2014-11-22 2015-06-13 Noise-filter-type ballast based on switch power amplification circuit Pending CN104968134A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510334583.6A CN104968134A (en) 2014-11-22 2015-06-13 Noise-filter-type ballast based on switch power amplification circuit

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN2014106761701 2014-11-22
CN201410676170.1A CN104506021A (en) 2014-11-22 2014-11-22 Grid drive system based on switch power amplifying circuit
CN201510334583.6A CN104968134A (en) 2014-11-22 2015-06-13 Noise-filter-type ballast based on switch power amplification circuit

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Publication Number Publication Date
CN104968134A true CN104968134A (en) 2015-10-07

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CN201410676170.1A Pending CN104506021A (en) 2014-11-22 2014-11-22 Grid drive system based on switch power amplifying circuit
CN201510334583.6A Pending CN104968134A (en) 2014-11-22 2015-06-13 Noise-filter-type ballast based on switch power amplification circuit

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CN201410676170.1A Pending CN104506021A (en) 2014-11-22 2014-11-22 Grid drive system based on switch power amplifying circuit

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Application publication date: 20151007