CN102769986B - Electronic ballast - Google Patents
Electronic ballast Download PDFInfo
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- CN102769986B CN102769986B CN201110117047.2A CN201110117047A CN102769986B CN 102769986 B CN102769986 B CN 102769986B CN 201110117047 A CN201110117047 A CN 201110117047A CN 102769986 B CN102769986 B CN 102769986B
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Abstract
The invention relates to an electronic ballast. The electronic ballast comprises a filter circuit, a rectifying circuit, a power factor correcting circuit and a charge pump power supply circuit which are sequentially connected, and further comprises an output-level circuit, a ballast control circuit, a light-dimming interface circuit, a ballast interface and a light-dimming control circuit. The output-level circuit is connected between the charge pump power supply circuit and a fluorescent lamp tube. A power source input end is connected with an output end of the charge pump power supply circuit, and a control input end is used for receiving ballast control signals and controlling lighting of the fluorescent lamp tube via the output-level circuit according to the ballast control signals. A control output end is connected with the output-level circuit. The light-dimming interface circuit is connected with the control input end of the ballast control circuit. The ballast interface is connected with the light-dimming interface circuit. The light-dimming control circuit is socketed with the ballast interface and controls light dimming. The light-dimming control circuit is socketed on the ballast interface, so that light dimming is realized. With no need for light dimming, a user can buy the electronic ballast without the light-dimming control circuit independently, and cost is saved.
Description
[technical field]
The present invention relates to electric lighting field, relate in particular to a kind of electric ballast.
[background technology]
Traditional dimmable electronic ballast mainly contains two kinds of forms, and a kind of is digital address (Digital Adressable Lighting Interface, DALI) dimming electronic ballast, and a kind of is the 0-10V dimming electronic ballast of simulation.Above-mentioned two kinds of dimming electronic ballasts exceed much compared with common non-dimming ballast price.For the light modulation of DALI ballast, need external DALI controller in addition, 0-10V light modulation need access 0-10V and control power supply, is relatively applicable to build large illuminator.But for single lamp light modulation or the less light modulation demand of quantity, light modulation parts price is relatively expensive.Above-mentioned ballast circuit is all made on a circuit board in addition, there is no circuit, is unfavorable for the expansion of ballast function.If client works as normal ballast with dimming ballast, use, cost performance is very low.Or client has bought common non-dimming ballast, want to upgrade to dimming ballast, existing ballast must replace.
[summary of the invention]
Based on this, be necessary to provide a kind of low cost extendible electric ballast.When match control chip not, can be used as common electric ballast and use, can realize dimming function after inserting control chip.
A kind of electric ballast, comprise the filter circuit, rectification circuit, circuit of power factor correction and the charge pump power supply circuits that connect in turn, also comprise: output-stage circuit, be connected between described charge pump power supply circuits and fluorescent tube, and obtain the direct current of circuit of power factor correction output, for described charge pump power supply circuits provide electric energy; Ballast control circuit, the power input of described ballast control circuit connects the output of described charge pump power supply circuits, the control input end of described ballast control circuit is for receiving and according to ballast control signal, fluorescent tube is carried out to light emitting control by described output-stage circuit, the output of described ballast control circuit connects described output-stage circuit; Dimming interface circuit, connects the control input end of described ballast control circuit, and described ballast control signal is sent to described ballast control circuit; Ballast interface, connects described dimming interface circuit; And adjusting control circuit, for pegging graft with described ballast interface, and carry out brightness adjustment control.
Preferably, described output-stage circuit comprises: half-bridge inversion circuit, control input end connects described ballast control circuit, power input connects circuit of power factor correction, under the driving of described ballast control circuit, by the DC inverter of circuit of power factor correction output, is alternating current output; Resonant circuit, for obtaining the voltage to described fluorescent tube build-up of luminance by resonance, the input of described resonant circuit connects the output of described half-bridge inversion circuit, the output of described resonant circuit connects described fluorescent tube, and the input of described charge pump power supply circuits is connected between described half-bridge inversion circuit and resonant circuit; Filament preheating circuit, for give the filament pre-heating of described fluorescent tube when described electric ballast starts, the input of described filament preheating circuit connects the output of described resonant circuit, and the output of described filament preheating circuit connects described fluorescent tube.
Preferably; the input of described abnormity protection circuit connects described fluorescent tube; at the voltage of the input of abnormity protection circuit, during higher than setting threshold, by the first output, guard signal is sent to described ballast control circuit, control described half-bridge inversion circuit and quit work.
Preferably, also comprise and connecting with described fluorescent tube and the lamp current sample circuit of ground connection, for gather the electric current of described fluorescent tube the output by described lamp current sample circuit by the current feedback of described fluorescent tube to described ballast control circuit.
Preferably, also comprise fluorescent tube protective circuit not in place, drag down the voltage of the power input of described ballast control circuit when not in place to described fluorescent tube, described electric ballast is quit work, signal not in place is sent to adjusting control circuit by described ballast interface simultaneously, the described fluorescent tube not input of protective circuit in place connects described fluorescent tube, described fluorescent tube is the power input of the first output connection ballast control circuit of protective circuit in place not, described fluorescent tube not the first output of protective circuit in place connects described ballast interface.
Preferably, described ballast interface comprises pulsewidth port, fluorescent tube detection port, fluorescent tube close port, fluorescent tube its enable port, ballast power detection port, power port and ground port; Described adjusting control circuit comprises micro-control unit, the first button and the second button; The pin that dims of described micro-control unit connects described the first button, and the pin that lightens of described micro-control unit connects described the second button, the lower margin of the described micro-control unit described ground port ground connection that is used for pegging graft; The pulse pin of the described micro-control unit described pulsewidth port that is used for pegging graft, output is subject to described the first button and second by the pulse signal of key control pulsewidth; The pin of closing of described micro-control unit is connected with described fluorescent tube close port, and output is for closing the pulse of closing of described fluorescent tube; The startup pin of described micro-control unit is connected with described fluorescent tube its enable port, and output is for starting the starting impulse of described fluorescent tube; The fluorescent tube of described micro-control unit detects the pin described fluorescent tube detection port that is used for pegging graft, signal not in place described in receiving by described fluorescent tube detection port; The ballast power of described micro-control unit detects the pin described ballast power detection port that is used for pegging graft, and by described ballast power detection port, connects dimming interface circuit; The supply pin of the described micro-control unit described power port that is used for pegging graft, receives the working power that described dimming interface circuit provides.
Preferably, described dimming interface circuit comprises: micro-control unit power supply circuits, the input of described micro-control unit power supply circuits is connected between described rectification circuit and circuit of power factor correction, the output of described micro-control unit power supply circuits connects described power port, for by after the voltage step-down of the input input by described micro-control unit power supply circuits for described adjusting control circuit provides working power; Adjusting control circuit, the input of described adjusting control circuit connects the output of described pulsewidth port and described micro-control unit power supply circuits, and the output of described adjusting control circuit connects the control input end of described ballast control circuit; Close lamp control circuit, the input of described pass lamp control circuit connects described close port, and the output of described pass lamp control circuit connects the control input end of described ballast control circuit; Ballast power testing circuit, connects the output of described ballast power detection port and charge pump power supply circuits, and whether detect described charge pump power supply circuits has supply voltage output.
Preferably, described micro-control unit power supply circuits comprise resistance R 72, resistance R 73, resistance R 74, resistance R 75, capacitor C 33, capacitor C 34, diode D13 and voltage stabilizing didoe Z2, described capacitor C 33, capacitor C 34 and voltage stabilizing didoe Z2 are parallel between described power port and ground wire, between the input of described power port and micro-control unit power supply circuits, connect and be connected to resistance R 74 and resistance R 75, described power port also with between the output of described charge pump power supply circuits is connected and is connected to diode D13, resistance R 72 and resistance R 73, the positive pole of described diode D13 connects the output of described charge pump power supply circuits.
Preferably, described ballast power testing circuit comprises resistance R 99, resistance R 100, resistance R 101 and NPN type triode Q8, the grounded emitter of described triode Q8 and with base stage between connect and be connected to resistance R 100, between the tie point of the base stage of described resistance R 100 and described triode Q8 and the output of described charge pump power supply circuits, be connected to resistance R 99, between the collector electrode of described triode Q8 and described power port, be connected to resistance R 101, and one end that described resistance R 101 connects the collector electrode of described triode Q8 is connected with described ballast power detection port.
Preferably, the control input end of described ballast control circuit comprises frequency pin, the first pin and crus secunda, described frequency pin connects the output of described adjusting control circuit, according to described pulse signal, by the output of described ballast control circuit, controlled the electric voltage frequency of described half-bridge inversion circuit output, thereby control the luminosity of described fluorescent tube; Described the first pin connects the output of described pass lamp control circuit and the first output of described abnormity protection circuit, and described crus secunda connects described fluorescent tube its enable port.
The adjusting control circuit of above-mentioned electric ballast is plugged in ballast interface, has realized dimming function.If do not need dimming function, because can be used as the use of ordinary electronic ballast after removing adjusting control circuit, so can first buy separately the above-mentioned electric ballast that use does not comprise adjusting control circuit, upgrade to dimmable electronic ballast by buying adjusting control circuit combination again while having light modulation to need later.Resource distribution is more flexible, if will realize with respect to traditional electric ballast the scheme that dimming function need to be changed original electric ballast, provides cost savings.
[accompanying drawing explanation]
Fig. 1 is the circuit block diagram of electric ballast in an embodiment;
Fig. 2 is the circuit block diagram of output-stage circuit in an embodiment;
Fig. 3 is the workflow diagram of adjusting control circuit 80 in an embodiment;
Fig. 4 is the circuit theory diagrams of electric ballast in an embodiment;
Fig. 5 is the partial enlarged drawing of filter circuit in Fig. 4 electric ballast, rectification circuit, circuit of power factor correction, charge pump power supply circuits, output-stage circuit;
Fig. 6 is the partial enlarged drawing of dimming interface circuit in Fig. 4 electric ballast.
Fig. 7 is the partial enlarged drawing of ballast interface and adjusting control circuit in Fig. 4 electric ballast.
[embodiment]
For object of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fig. 1 is the circuit block diagram of electric ballast in an embodiment, comprise the filter circuit 10, rectification circuit 20, circuit of power factor correction 30 and the charge pump power supply circuits 60 that connect in turn, also comprise output-stage circuit 50, ballast control circuit 40, dimming interface circuit 70, ballast interface 90 and adjusting control circuit 80.Filter circuit 10 carries out the alternating current of 220 volts of input to export to rectification circuit 20 after filtering processing, by rectification circuit 20, undertaken after rectification processing, after carrying out power factor correction, circuit of power factor correction 30 exports the direct current of 450 volts again, meet the performance requirement of Electro Magnetic Compatibility (Electro Magnetic Compatibility, EMC) and High Power Factor.In the present embodiment, can to adopt model be power factor correction (PFC) chip of L6562D to circuit of power factor correction 30.
Output-stage circuit 50 is connected between charge pump power supply circuits 60 and fluorescent tube, and output-stage circuit 50 obtains the direct current of circuit of power factor correction 30 output, for charge pump power supply circuits 60 and fluorescent tube provide electric energy.The power input of ballast control circuit 40 connects the output of charge pump power supply circuits 60, the ballast control signal that the control input end of ballast control circuit 40 sends for receiving dimming interface circuit 70, and according to described ballast control signal, carry out light emitting control by 50 pairs of fluorescent tubes of output-stage circuit.The output of ballast control circuit 40 connects output-stage circuit 50.Dimming interface circuit 70 connects the control input end of ballast control circuit 40, and ballast control signal is sent to ballast control circuit 40.Ballast interface 90 connects dimming interface circuit 70.Adjusting control circuit 80, for pegging graft with ballast interface 70, carries out brightness adjustment control by sending ballast control signal.
Above-mentioned electric ballast is integrated in filter circuit 10, rectification circuit 20, circuit of power factor correction 30, charge pump power supply circuits 60, output-stage circuit 50, ballast control circuit 40, dimming interface circuit 70, ballast interface 90 on a circuit board 100, adjusting control circuit 80 is made on another piece circuit board, adjusting control circuit 80, by ballast interface 90 grafting circuit boards 100, has been realized dimming function.If do not need dimming function, because can be used as ordinary electronic ballast after removing adjusting control circuit, so can first buy separately the above-mentioned electric ballast that use does not comprise adjusting control circuit, upgrade to dimmable electronic ballast by buying adjusting control circuit combination again while having light modulation to need later.Resource distribution is more flexible, if will realize with respect to traditional electric ballast the scheme that dimming function need to be changed original electric ballast, provides cost savings.
Fig. 2 is the circuit block diagram of output-stage circuit in an embodiment.Output-stage circuit 50 comprises half-bridge inversion circuit 51, resonant circuit 52 and filament preheating circuit 53.
The control input end of half-bridge inversion circuit 51 connects ballast control circuit 40, the power input of half-bridge inversion circuit 51 connects circuit of power factor correction 30, under the driving of ballast control circuit 40, the DC inverter of circuit of power factor correction 30 outputs is alternating current and exports to resonant circuit 52.
Resonant circuit 52 is for obtain the voltage to fluorescent tube build-up of luminance by resonance, and the input of resonant circuit 52 connects the output of half-bridge inversion circuit 51, and the output of resonant circuit 52 connects fluorescent tube.The input of charge pump power supply circuits 60 is connected between half-bridge inversion circuit 51 and resonant circuit 52, charge pump power supply circuits 60 are from resonant circuit 52 coupling energies, be converted into 12 volt direct currents, the output (VDC end) by charge pump power supply circuits 60 is that circuit of power factor correction 30, ballast control circuit 40, micro-control unit power supply circuits 71 (referring to Fig. 4) provide power supply.The input of charge pump power supply circuits 60 is also connected with the output of circuit of power factor correction 30, electric energy auxiliary charge pump power supply circuits 60 power supplies of being exported by circuit of power factor correction 30 before half-bridge inversion circuit 51 and resonant circuit 52 work.
Filament preheating circuit 53 for when electric ballast starts to the filament pre-heating of fluorescent tube, the input of filament preheating circuit connects the output of resonant circuit 52, the output of filament preheating circuit connects fluorescent tube.
Referring to Fig. 4, in resonant circuit 52, inductance L 5 forms parallel resonance with capacitor C 18, in filament preheating circuit 53, inductance L 9 and capacitor C 21 form series resonance, because resonant circuit 52 is different from the resonance frequency of filament preheating circuit 53, thus ballast control circuit 40 by adjust output frequency just can control fluorescent tube preheating and luminous between switching.
In the present embodiment; electric ballast comprises fluorescent tube protective circuit 54 not in place; the voltage that drags down the power input (outputs of charge pump power supply circuits 60) of ballast control circuit 40 when not in place to fluorescent tube, quits work electric ballast.Signal not in place is sent to adjusting control circuit 80 by ballast interface 90 simultaneously.Referring to Fig. 4; the input of fluorescent tube protective circuit 54 not in place connects fluorescent tube; the first output of fluorescent tube protective circuit 54 not in place connects the power input (VDC end) of ballast control circuit 40, and the second output of fluorescent tube protective circuit 54 not in place connects the fluorescent tube detection port CHECK-LAMP of ballast interface 90.
In the present embodiment, electric ballast comprises abnormity protection circuit 55.The input of abnormity protection circuit 55 connects fluorescent tube; at fluorescent tube, occur abnormal; during situations such as fluorescent tube open circuit, filament inefficacy; the input of abnormity protection circuit 55 can form high pressure; when this high pressure is during higher than setting threshold; by the first output, guard signal is sent to the first pin EN1 (referring to Fig. 4) of the ballast control chip U2 of ballast control circuit 40, control half-bridge inversion circuit 51 and stop output.
In the present embodiment, electric ballast comprises connects with fluorescent tube and the lamp current sample circuit 56 of ground connection, for gather the electric current of fluorescent tube the output by lamp current sample circuit by the current feedback of fluorescent tube to ballast control circuit 40.
Fig. 4 is the circuit theory diagrams of electric ballast in an embodiment.Because Fig. 4 is larger, check for convenience, Fig. 5, Fig. 6, the several partial enlarged drawings of Fig. 7 are provided in the lump.
Ballast interface 90 comprises pulsewidth port PWM, fluorescent tube detection port CHECK-LAMP, fluorescent tube close port TO-EN1, fluorescent tube its enable port TO-EN2, ballast power detection port CHECK-VDC, power port DC5V and ground port.
Adjusting control circuit 80 comprises micro-control unit (Micro Control Unit, MCU) U3, the first button S1 and the second button S2.In the present embodiment, micro-control unit U3 adopts the chip that model is ATTINY2313V.The pin PD4 that dims of micro-control unit U3 connects the first button S1, and the pin PD5 that lightens of micro-control unit U3 connects the second button S2.The lower margin GND of micro-control unit U3 is for plug port ground connection.The pulse pin PB4 of the micro-control unit U3 pulsewidth port PWM that is used for pegging graft, output is subject to the first button S1 and the second button S2 to control the pulse signal of pulsewidth.The short first button S1 that presses, the pulse signal pulsewidth of pulse pin PB4 output reduces, fluorescent tube brightness deterioration; The short second button S2 that presses, the pulse signal pulsewidth of pulse pin PB4 output increases, and fluorescent tube brightness strengthens.The first button S1 is all connected with a power end with the second button S2, is power port DC5V in the present embodiment.Button is pressed rear circuit turn-on, dims pin PD4 (or lightening pin PD5) and obtains electric.
The pin PB0 that closes of micro-control unit U3 is connected with fluorescent tube close port TO-EN1, and output is for closing the pulse of closing of fluorescent tube.The startup pin PB1 of micro-control unit U3 is connected with fluorescent tube its enable port TO-EN2, and output is for starting the starting impulse of fluorescent tube.
The fluorescent tube of micro-control unit U3 detects the pin PB2 fluorescent tube detection port CHECK-LAMP that is used for pegging graft, and by fluorescent tube detection port CHECK-LAMP, receives the signal not in place that fluorescent tube protective circuit 54 not in place sends.The ballast power of micro-control unit U3 detects the pin PD6 ballast power detection port CHECK-VDC that is used for pegging graft, and by ballast power detection port CHECK-VDC, connects ballast power testing circuit 74, and whether detect VDC end has supply voltage output.The supply pin of micro-control unit U3, for socket power port DC5V, receives the working power that micro-control unit power supply circuits 71 provide.
Micro-control unit U3 can programme by port, and the function of the electric ballast of therefore can arbitrarily upgrading at any time, such as adding timed startup/shutdown function, remote control light modulating function, human induction switch function etc.
Dimming interface circuit 70 comprises micro-control unit power supply circuits 71, and adjusting control circuit 72 closes lamp control circuit 73 and ballast power testing circuit 74.
The input of micro-control unit power supply circuits 71 is connected between rectification circuit 20 and circuit of power factor correction 30 by DC311V port, for by the voltage step-down of the input input by micro-control unit power supply circuits 71 for 5 volts of voltages of direct current after for adjusting control circuit 72 provides working power, 5 volts of voltages of this direct current simultaneously supply power port DC5V, close lamp control circuit 73, ballast power testing circuit 74.Micro-control unit power supply circuits 71 comprise resistance R 72, resistance R 73, resistance R 74, resistance R 75, capacitor C 33, capacitor C 34, diode D13 and voltage stabilizing didoe Z2.Capacitor C 33, capacitor C 34 and voltage stabilizing didoe Z2 three are parallel between power port DC5V and ground wire, 5 volt DC voltages of stable output.Between power port DC5V and DC311V port, connect and be connected to resistance R 74 and resistance R 75.Power port DC5V connects and is connected to diode D13, resistance R 72 and resistance R 73 between also holding with VDC, and wherein the positive pole of diode D13 connects VDC end.
The input of adjusting control circuit 72 connects pulsewidth port PWM and power port DC5V (being the output of micro-control unit power supply circuits 71), and the output of adjusting control circuit 72 connects ballast control circuit 40.Ballast control circuit 40 is controlled the luminosity of fluorescent tube according to the pulse signal of pulsewidth port PWM output.Adjusting control circuit 72 comprises resistance R 91, resistance R 92, resistance R 93, resistance R 94, resistance R 95, resistance R 96 and capacitor C 32.Capacitor C 32 one end ground connection, other end connecting resistance R91, resistance R 92 and resistance R 93; Resistance R 91 another termination pulsewidth port PWM; Resistance R 92 another termination power port DC5V; Resistance R 93 other end connecting resistance R94 and resistance R 95; The control input end of resistance R 94 another termination ballast control circuits 40; The second output NET2 of the other end connecting resistance R96 of resistance R 95 and abnormity protection circuit 55; The other end ground connection of resistance R 96.The second output NET2 of abnormity protection circuit 55 can send to ballast control circuit 40 via the control input end of ballast control circuit 40 by abnormal protection signal.
Adjusting control circuit 72 sends to ballast control circuit 40 by the pulse signal of pulsewidth port PWM input, according to the pulsewidth of pulse signal, carries out light modulation.When not pegging graft adjusting control circuit 80,72 signals of telecommunication that power port DC5V is provided of adjusting control circuit send to ballast control circuit 40, and fluorescent tube still can be normally luminous.
Close the input connecting tube close port TO-EN1 of lamp control circuit 73, the output that closes lamp control circuit 73 connects the control input end of ballast control circuit 40.Close lamp control circuit 73 and comprise resistance R 81, resistance R 83, resistance R 84, resistance R 85 and NPN type triode Q6.The base stage of triode Q6 connects power port DC5V by resistance R 81, collector electrode connects by resistance R 83 the first pin EN1 that VDC holds, also connects ballast control chip U2 by resistance R 84, between the first pin EN1 and fluorescent tube close port TO-EN1, be connected to resistance R 85, the grounded emitter of triode Q6.
Ballast power testing circuit 74 connects the output (VDC end) of ballast power detection port CHECK-VDC and charge pump power supply circuits 60, and whether detect charge pump power supply circuits 60 has supply voltage output.Ballast power testing circuit 74 comprises resistance R 99, resistance R 100, resistance R 101 and NPN type triode Qg.The grounded emitter of triode Qg and with base stage between connect and be connected to resistance R 100, between the tie point of resistance R 100 and base stage and VDC end, be connected to resistance R 99, between the collector electrode of triode Qg and power port DC5V, be connected to resistance R 101, and one end that resistance R 101 connects collector electrode is connected with ballast power detection port CHECK-VDC.When VDC rectifies normal output supply voltage (direct currents of 12 volts), the voltage of ballast power detection port CHECK-VDC is dragged down.
Ballast control circuit 40 comprises ballast control chip U2.In the present embodiment, ballast control chip U2 adopts the chip that model is L6574D.The control input end of ballast control circuit 40 comprises frequency pin OPIN+, the first pin EN1 and crus secunda EN2.Frequency pin OPIN+ connects the output of adjusting control circuit 72, according to pulse signal, is controlled the electric voltage frequency of half-bridge inversion circuit 51 outputs by the output of ballast control circuit 40, thereby controls the luminosity of fluorescent tube.The output of ballast control circuit 40 comprises LVG pin and HVG pin.The first pin EN1 connect to close the output of lamp control circuit 73 and the first output of abnormity protection circuit 55, is receiving the output that stops ballast control circuit 40 while closing pulse or guard signal.Crus secunda connecting tube its enable port TO-EN2.The power input of ballast control circuit is supply pin VS, and the VDC that connects charge pump power supply circuits 60 by resistance R 43 holds.
Fig. 3 is the workflow diagram of adjusting control circuit 80 in an embodiment, and its workflow is as follows:
S310, system initialization, simultaneously opens interrupters subprogram.
Main program starts rear micro-control unit U3 and first carries out system initialization, simultaneously opens interrupters subprogram.First interruption subroutine can perform step S312, whether in placely detects fluorescent tube, if so, performs step S314; If not, perform step S313, fluorescent tube close port TO-EN1 (closing pin PB0) enables, and sending pulsewidth is the pulse of closing of 150 microseconds, then enters step S330.Step S314 detects ballast whether to have power supply, detection is undertaken by ballast power testing circuit 74, if there is power supply (VDC holds high level), the voltage of ballast power detection port CHECK-VDC is dragged down, interruption subroutine finishes, and enters step S320; If detect, there is no power supply (ballast power detection port CHECK-VDC high level), enter equally step S313.
S320, key scan.
Scan the second button S2 whether by short by, the second button S2 whether be long pressed, whether whether the first button S1 be long pressed by, the first button S1 by short.If scan the second button S2 by short by, perform step S322, the pulse signal pulsewidth of pulse pin PB4 (pulsewidth port PWM) increases, fluorescent tube is lightened.If scan the second button S2, be long pressed, perform step S324, start pin PB1 (fluorescent tube its enable port TO-EN2) and enable, fluorescent tube starts (luminosity is the brightness before last fluorescent tube is closed); Return to step S310 simultaneously.If scan the first button S1 by short by, perform step S326, the pulse signal pulsewidth of pulse pin PB4 (pulsewidth port PWM) reduces, fluorescent tube is dimmed.If scan the first button S1, be long pressed, perform step S328, close pin PB0 (fluorescent tube close port TO-EN1) and enable, fluorescent tube is closed, and enters step S330.
S330, enters low-power consumption mode.Micro-control unit U3 enters low-power consumption standby pattern, and micro-control unit U3 input current is less than 1 milliampere, and stand-by power consumption is less than 0.3 watt in the present embodiment.Enter after low-power consumption mode, return to step S320, wait is long to wake rear startup fluorescent tube up and returns to step S310 by the second button S2.
Fluorescent tube can be used two T5 fluorescent tubes, and every power of lamp tube can be 14 watts, 21 watts, 28 watts, 35 watts etc.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, 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 claims.
Claims (8)
1. an electric ballast, comprises the filter circuit, rectification circuit, circuit of power factor correction and the charge pump power supply circuits that connect in turn, it is characterized in that, also comprises:
Output-stage circuit, is connected between described charge pump power supply circuits and fluorescent tube, and obtains the direct current of circuit of power factor correction output, for described charge pump power supply circuits and fluorescent tube provide electric energy;
Ballast control circuit, the power input of described ballast control circuit connects the output of described charge pump power supply circuits, the control input end of described ballast control circuit is for receiving and according to ballast control signal, fluorescent tube is carried out to light emitting control by described output-stage circuit, the output of described ballast control circuit connects described output-stage circuit;
Dimming interface circuit, connects the control input end of described ballast control circuit, and described ballast control signal is sent to described ballast control circuit;
Ballast interface, connects described dimming interface circuit; And
Adjusting control circuit, for pegging graft with described ballast interface, carries out brightness adjustment control by sending ballast control signal;
Fluorescent tube protective circuit not in place, drag down the voltage of the power input of described ballast control circuit when not in place to described fluorescent tube, described electric ballast is quit work, signal not in place is sent to adjusting control circuit by described ballast interface simultaneously, the described fluorescent tube not input of protective circuit in place connects described fluorescent tube, described fluorescent tube is the power input of the first output connection ballast control circuit of protective circuit in place not, and described fluorescent tube not the second output of protective circuit in place connects described ballast interface;
Described ballast interface comprises pulsewidth port, fluorescent tube detection port, fluorescent tube close port, fluorescent tube its enable port, ballast power detection port, power port and ground port;
Described adjusting control circuit comprises micro-control unit, the first button and the second button; The pin that dims of described micro-control unit connects described the first button, and the pin that lightens of described micro-control unit connects described the second button, the lower margin of the described micro-control unit described ground port ground connection that is used for pegging graft; The pulse pin of the described micro-control unit described pulsewidth port that is used for pegging graft, output is subject to described the first button and second by the pulse signal of key control pulsewidth; The pin of closing of described micro-control unit is connected with described fluorescent tube close port, and output is for closing the pulse of closing of described fluorescent tube; The startup pin of described micro-control unit is connected with described fluorescent tube its enable port, and output is for starting the starting impulse of described fluorescent tube;
The fluorescent tube of described micro-control unit detects the pin described fluorescent tube detection port that is used for pegging graft, signal not in place described in receiving by described fluorescent tube detection port; The ballast power of described micro-control unit detects the pin described ballast power detection port that is used for pegging graft, and by described ballast power detection port, connects dimming interface circuit; The supply pin of the described micro-control unit described power port that is used for pegging graft, receives the working power that described dimming interface circuit provides.
2. electric ballast according to claim 1, is characterized in that, described output-stage circuit comprises:
Half-bridge inversion circuit, control input end connects described ballast control circuit, and power input connects circuit of power factor correction, under the driving of described ballast control circuit, by the DC inverter of circuit of power factor correction output, is alternating current output;
Resonant circuit, for obtaining the voltage to described fluorescent tube build-up of luminance by resonance, the input of described resonant circuit connects the output of described half-bridge inversion circuit, the output of described resonant circuit connects described fluorescent tube, and the input of described charge pump power supply circuits is connected between described half-bridge inversion circuit and resonant circuit;
Filament preheating circuit, for give the filament pre-heating of described fluorescent tube when described electric ballast starts, the input of described filament preheating circuit connects the output of described resonant circuit, and the output of described filament preheating circuit connects described fluorescent tube.
3. electric ballast according to claim 2; it is characterized in that; also comprise abnormity protection circuit; the input of described abnormity protection circuit connects described fluorescent tube; at the voltage of the input of abnormity protection circuit during higher than setting threshold; by the first output, guard signal is sent to described ballast control circuit, control described half-bridge inversion circuit and quit work.
4. electric ballast according to claim 1, it is characterized in that, also comprise and connecting with described fluorescent tube and the lamp current sample circuit of ground connection, for gather the electric current of described fluorescent tube the output by described lamp current sample circuit by the current feedback of described fluorescent tube to described ballast control circuit.
5. electric ballast according to claim 1, is characterized in that, described dimming interface circuit comprises:
Micro-control unit power supply circuits, the input of described micro-control unit power supply circuits is connected between described rectification circuit and circuit of power factor correction, the output of described micro-control unit power supply circuits connects described power port, for by after the voltage step-down of the input input by described micro-control unit power supply circuits for described adjusting control circuit provides working power;
Adjusting control circuit, the input of described adjusting control circuit connects the output of described pulsewidth port and described micro-control unit power supply circuits, and the output of described adjusting control circuit connects the control input end of described ballast control circuit;
Close lamp control circuit, the input of described pass lamp control circuit connects described close port, and the output of described pass lamp control circuit connects the control input end of described ballast control circuit;
Ballast power testing circuit, connects the output of described ballast power detection port and charge pump power supply circuits, and whether detect described charge pump power supply circuits has supply voltage output.
6. electric ballast according to claim 5, it is characterized in that, described micro-control unit power supply circuits comprise resistance R 72, resistance R 73, resistance R 74, resistance R 75, capacitor C 33, capacitor C 34, diode D13 and voltage stabilizing didoe Z2, described capacitor C 33, capacitor C 34 and voltage stabilizing didoe Z2 are parallel between described power port and ground wire, between the input of described power port and micro-control unit power supply circuits, connect and be connected to resistance R 74 and resistance R 75, described power port also with between the output of described charge pump power supply circuits is connected and is connected to diode D13, resistance R 72 and resistance R 73, the positive pole of described diode D13 connects the output of described charge pump power supply circuits.
7. electric ballast according to claim 5, it is characterized in that, described ballast power testing circuit comprises resistance R 99, resistance R 100, resistance R 101 and NPN type triode Q8, the grounded emitter of described triode Q8 and with base stage between connect and be connected to resistance R 100, between the tie point of the base stage of described resistance R 100 and described triode Q8 and the output of described charge pump power supply circuits, be connected to resistance R 99, between the collector electrode of described triode Q8 and described power port, be connected to resistance R 101, and one end that described resistance R 101 connects the collector electrode of described triode Q8 is connected with described ballast power detection port.
8. electric ballast according to claim 5, is characterized in that, described output-stage circuit comprises:
Half-bridge inversion circuit, control input end connects described ballast control circuit, and power input connects circuit of power factor correction, under the driving of described ballast control circuit, by the DC inverter of circuit of power factor correction output, is alternating current output;
Resonant circuit, for obtaining the voltage to described fluorescent tube build-up of luminance by resonance, the input of described resonant circuit connects the output of described half-bridge inversion circuit, the output of described resonant circuit connects described fluorescent tube, and the input of described charge pump power supply circuits is connected between described half-bridge inversion circuit and resonant circuit;
Filament preheating circuit, for give the filament pre-heating of described fluorescent tube when described electric ballast starts, the input of described filament preheating circuit connects the output of described resonant circuit, and the output of described filament preheating circuit connects described fluorescent tube;
Described electric ballast also comprises abnormity protection circuit, the input of described abnormity protection circuit connects described fluorescent tube, at the voltage of the input of abnormity protection circuit during higher than setting threshold, by the first output, guard signal is sent to described ballast control circuit, control described half-bridge inversion circuit and quit work;
The control input end of described ballast control circuit comprises frequency pin, the first pin and crus secunda, described frequency pin connects the output of described adjusting control circuit, according to described pulse signal, by the output of described ballast control circuit, controlled the electric voltage frequency of described half-bridge inversion circuit output, thereby control the luminosity of described fluorescent tube; Described the first pin connects the output of described pass lamp control circuit and the first output of described abnormity protection circuit, and described crus secunda connects described fluorescent tube its enable port.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110117047.2A CN102769986B (en) | 2011-05-06 | 2011-05-06 | Electronic ballast |
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| CN201110117047.2A CN102769986B (en) | 2011-05-06 | 2011-05-06 | Electronic ballast |
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| CN102769986B true CN102769986B (en) | 2014-10-15 |
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| US9882471B2 (en) | 2011-05-05 | 2018-01-30 | Peregrine Semiconductor Corporation | DC-DC converter with modular stages |
| US10680515B2 (en) | 2011-05-05 | 2020-06-09 | Psemi Corporation | Power converters with modular stages |
| WO2017161368A1 (en) * | 2016-03-18 | 2017-09-21 | Arctic Sand Technologies, Inc. | Power converters with modular stages |
| EP3425784B1 (en) | 2011-05-05 | 2023-09-06 | PSEMI Corporation | Dc-dc converter with modular stages |
| US8619445B1 (en) | 2013-03-15 | 2013-12-31 | Arctic Sand Technologies, Inc. | Protection of switched capacitor power converter |
| CN103634995A (en) * | 2013-12-19 | 2014-03-12 | 中山市中大半导体照明技术研究有限公司 | Button configuration method of multifunctional lighting controller based on DALI (Digitally Addressable Lighting Interface) protocol |
| CN105611708A (en) * | 2015-11-02 | 2016-05-25 | 林晓东 | Novel electronic ballast |
| CN112187059A (en) * | 2016-03-14 | 2021-01-05 | 派赛公司 | Power converter apparatus |
| CN114513873A (en) * | 2020-11-17 | 2022-05-17 | 北京金晟达生物电子科技有限公司 | Electronic ballast |
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