CN204014214U - A kind of high-powered LED lamp three-stage dimming circuit - Google Patents
A kind of high-powered LED lamp three-stage dimming circuit Download PDFInfo
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- CN204014214U CN204014214U CN201420462677.2U CN201420462677U CN204014214U CN 204014214 U CN204014214 U CN 204014214U CN 201420462677 U CN201420462677 U CN 201420462677U CN 204014214 U CN204014214 U CN 204014214U
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- 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
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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Abstract
This practicality is novel a kind of high-powered LED lamp three-stage dimming circuit, comprising: external ac power source input AC electricity is converted to galvanic rectification circuit; Form the pulsed triggering circuit of pulse triggering signal; Form the accumulator that the retention time is more than or equal to 8 seconds DC power supply; Receive the block switch circuit of described pulse triggering signal circulation output three condition switching signal; According to the dimming resistor circuit of three kinds of different resistance resistance of the corresponding formation of described three condition switching signal; According to the constant-current control circuit of three kinds of different duty pulse-width signals of described three kinds of corresponding output of different resistance resistance; Described pulse-width signal is carried out to the power amplification circuit of power amplification; According to three kinds of big or small drive currents of difference of the corresponding formation of described three kinds of different duty pulse-width signals, LED lamp is carried out to the pulse transformer circuit of three sections of circulation light modulations.Solve prior art and can not realize the technical problem that high-powered LED lamp intensity of illumination regulates.
Description
Technical field
The utility model relates to LED lamp light regulating technology field, relates in particular to a kind of high-powered LED lamp three-stage dimming circuit.
Background technology
LED lamp is widely used as light source, occurs various LED lamp drive circuits thereupon.Because LED self requires harshlyer to operating voltage, overtension or too lowly all can cause LED lamp operating current fluctuation, so generally adopt constant current voltage limiting type of drive to LED lamp.Thereby during as current mode operating load, the electric current that flows through LED lamp must guarantee in rated current at LED lamp.
At present, DC low-voltage place adopts integrated integrated high-frequency model design LED lamp to drive, still, mostly these type of drive are firm power output, can not regulate power output, and then intensity of illumination can not regulate, to user, make troubles.
Especially, for high-power LED mine lamp, owing to there is no dimming function, thereby can not to illuminated field institute light fixture, carry out the adjusting of lamp brightness according to not equal lighting requirement of lighting environment, period, obviously reduce electricity saving and energy saving effect.
Utility model content
For this reason, technical problem to be solved in the utility model is that prior art can not realize high-powered LED lamp intensity of illumination and regulate, thereby propose a kind of high-powered LED lamp three-stage dimming circuit, solves this problem.
A kind of high-powered LED lamp three-stage dimming circuit of the present utility model, comprising: rectification circuit, and described rectification circuit input end is electrically connected to external ac power source, for the alternating current of external ac power source input is converted to direct current; Pulsed triggering circuit, described pulsed triggering circuit input is electrically connected to external ac power source, is used to form pulse triggering signal; Accumulator, described accumulator input is electrically connected to external ac power source, is used to form the DC power supply that the retention time is more than or equal to 8 seconds; Block switch circuit, described block switch circuit work power end is electrically connected to described accumulator output, described block switch circuit clock input is electrically connected to described pulsed triggering circuit output, for receiving described pulse triggering signal circulation output three condition switching signal; Dimming resistor circuit, described dimming resistor circuit is electrically connected to described block switch circuit output end, for according to three kinds of different resistance resistance of the corresponding formation of described three condition switching signal; Constant-current control circuit, described constant-current control circuit working power end is electrically connected to described rectification circuit output end, described constant-current control circuit light modulation input is electrically connected to described dimming resistor circuit, for according to three kinds of different duty pulse-width signals of described three kinds of corresponding output of different resistance resistance; Power amplification circuit, described power amplification circuit working power end is electrically connected to described rectification circuit output end, and described power amplification circuit input is electrically connected to described constant-current control circuit output, for described pulse-width signal is carried out to power amplification; Pulse transformer circuit, described pulse transformer circuit input end is electrically connected to the auxiliary winding feedback signal sampling end of described constant-current control circuit, described rectification circuit output end, described power amplification circuit output respectively, described pulse transformer circuit output end is electrically connected to LED lamp, for LED lamp being carried out to three sections of circulation light modulations according to three kinds of big or small drive currents of difference of the corresponding formation of described three kinds of different duty pulse-width signals.
Preferably, described rectification circuit comprises rectifier bridge, filter capacitor, described rectifier bridge input termination external ac power source, and described filter capacitor is in parallel with described rectification bridge output end.
Preferably, described pulsed triggering circuit comprises diode, voltage stabilizing didoe, the first resistance, the second resistance and electric capacity, described diode cathode connects external ac power source, described diode cathode connects described the first resistance to described voltage stabilizing didoe negative pole, described voltage stabilizing didoe plus earth, described electric capacity and described the second resistance are in parallel with described voltage stabilizing didoe respectively.
Preferably, described block switch circuit comprises that model is block switch chip, resistance, the electric capacity of TC2608, described block switch chip input end of clock is electrically connected to described resistance one end, electric capacity one end respectively, described electric capacity other end ground connection, the described resistance other end is electrically connected to described pulsed triggering circuit output, described block switch chip power is anodal to be electrically connected to described accumulator output head anode, described block switch chip power negative pole, mode selection terminal be ground connection respectively, and described block switch chip output is electrically connected to described dimming resistor circuit.
Preferably, described dimming resistor circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the first triode, the second triode, the 3rd triode, the first diode, the second diode, described the first transistor collector is electrically connected to the first resistance, grounded emitter, base stage connects described the 3rd resistance to described block switch circuit the first output; Described the second transistor collector is electrically connected to the second resistance, grounded emitter, and base stage is electrically connected to described the 3rd transistor collector; Described the 3rd transistor collector connects described the 4th resistance to described block switch circuit the second output, grounded emitter, and described the 5th resistance in parallel between emitter and base stage, base stage is electrically connected to described the 6th resistance one end; Described the 6th resistance other end is electrically connected to described the first diode cathode, described the second diode cathode respectively, described the first diode cathode is electrically connected to described block switch circuit the first output, and described the second diode cathode is electrically connected to described block switch circuit the second output.
Preferably, described constant-current control circuit comprises that model is the constant current control chip of BP3318, the first electric capacity, the second electric capacity, the first resistance, the second resistance, described constant current control chip positive source connects the first resistance to described rectification circuit output end, described constant current control chip power cathode ground connection, described constant current control chip loop compensation termination the first electric capacity is to ground, described constant current control chip current sample termination the second resistance is to ground, the auxiliary winding feedback signal sampling end of described constant current control chip is electrically connected to described pulse transformer circuit input end, described constant current control chip light modulation input connects respectively described dimming resistor circuit, the second electric capacity is to ground, power amplification circuit input described in described constant current control chip output termination.
Preferably, described pulse transformer circuit comprises pulse transformer, metal-oxide-semiconductor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first diode, the second diode, , the 3rd diode, the first electric capacity, the second electric capacity, the 3rd electric capacity, described pulse transformer armature winding different name end respectively with first resistance one end, first electric capacity one end, the 5th resistance one end, described rectification circuit output end is anodal to be electrically connected to, described pulse transformer armature winding Same Name of Ends respectively with described the first diode cathode, described metal-oxide-semiconductor drain electrode is electrically connected to, described the first diode cathode respectively with the first resistance other end, the first electric capacity other end is electrically connected to, described pulse transformer secondary winding Same Name of Ends is electrically connected to described the second diode cathode, and described the second diode cathode is connected with described second electric capacity one end, and described pulse transformer secondary winding different name end is electrically connected to the described second electric capacity other end, the auxiliary Motor Winding Same Name of Ends of described pulse transformer is electrically connected to the 3rd diode cathode, the 3rd resistance one end, and described pulse transformer is assisted winding different name end ground connection, described the 3rd resistance other end is electrically connected to the auxiliary winding feedback signal sampling end of described constant-current control circuit, the 4th resistance one end respectively, described the 4th resistance other end ground connection, described the 3rd diode cathode is electrically connected to the 3rd electric capacity one end, described the 5th resistance other end respectively, described the 3rd electric capacity other end ground connection, described metal-oxide-semiconductor grid connects described power amplification circuit output, and described metal-oxide-semiconductor source electrode connects the second resistance to ground.
Preferably, described accumulator comprises the first resistance, the second resistance, the first diode, the second diode and electric capacity, described the first diode cathode connects external ac power source, described the first diode cathode connects described the first resistance to described the second diode cathode, described the second diode cathode is rectified the utmost point with described block switch circuit work power respectively, described electric capacity one end is electrically connected to, described electric capacity other end ground connection, described the second resistance and described Capacitance parallel connection.
Preferably, to be used to form the retention time be the 8-20 DC power supply of second to described accumulator.
Preferably, described power amplification circuit comprises the first triode, the second triode, the first resistance and the second resistance, described the first transistor base, described the second transistor base is electrically connected to described constant-current control circuit output respectively, described the first transistor emitter, the second transistor emitter is electrically connected to described first resistance one end respectively, the described first resistance other end is electrically connected to described pulse transformer circuit input end, described the first transistor collector is electrically connected to described constant-current control circuit working power end is anodal, described the second transistor collector ground connection, described the second transistor collector, described the second resistance in parallel between base stage.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) a kind of high-powered LED lamp three segment sync group controlled light regulating circuit of the present utility model, whenever external ac power source disconnects closure once, pulsed triggering circuit correspondingly forms a pulse triggering signal; Block switch circuit receives described pulse triggering signal, and disconnects closing order circulation output three condition switching signal according to external power source; Dimming resistor circuit is according to three kinds of different resistance resistance of the corresponding formation of described three condition switching signal; Constant-current control circuit is according to three kinds of different duty pulse-width signals of described three kinds of corresponding output of different resistance resistance; Power amplification circuit carries out power amplification to described pulse-width signal; Pulse transformer circuit carries out three-stage dimming according to three kinds of different duty pulse-width signal drive currents of the corresponding formation of described three kinds of different duty pulse-width signals to LED lamp, and then realizes great power LED light is carried out to the adjusting of three kinds of different illumination intensity.
(2) a kind of high-powered LED lamp three-stage dimming circuit of the present utility model, described power amplification circuit comprises the first triode, the second triode, the first resistance and the second resistance, described the first transistor base, described the second transistor base is electrically connected to described constant-current control circuit output respectively, described the first transistor emitter, the second transistor emitter is electrically connected to described first resistance one end respectively, the described first resistance other end is electrically connected to described pulse transformer circuit input end, described the first transistor collector is electrically connected to described constant-current control circuit working power end is anodal, described the second transistor collector ground connection, described the second transistor collector, described the second resistance in parallel between base stage.Described power amplification circuit is realized constant-current control circuit output pulse width modulation signal is carried out to power amplification, makes the driving power of constant-current control circuit output pulse width modulation signal bring up to 200W by 60W.
Accompanying drawing explanation
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is the structural representation of a kind of high-powered LED lamp three-stage dimming circuit of the utility model embodiment;
Fig. 2 is the circuit theory diagrams of a kind of high-powered LED lamp three-stage dimming circuit of the utility model embodiment.
Embodiment
Fig. 1 is the structural representation of a kind of high-powered LED lamp three-stage dimming circuit of the utility model embodiment, high-powered LED lamp three-stage dimming circuit is for regulating LED lamp intensity of illumination, comprise: rectification circuit 110, pulsed triggering circuit 130, accumulator 120, block switch circuit 140, dimming resistor circuit 150, constant-current control circuit 160, pulse transformer circuit 170, power amplification circuit 180.
Rectification circuit 110 inputs are electrically connected to external ac power source 200, for the alternating current of external ac power source 200 inputs is converted to direct current.
Pulsed triggering circuit 130 inputs are electrically connected to external ac power source 200, are used to form pulse triggering signal.
Accumulator 120 inputs are electrically connected to external ac power source 200, are used to form the DC power supply that the retention time is more than or equal to 8 seconds.As preferred embodiment, it is the 8-20 DC power supply of second that accumulator 120 is used to form the retention time.
Block switch circuit 140 working power ends are electrically connected to accumulator 120 outputs, and block switch circuit 140 input end of clock are electrically connected to pulsed triggering circuit 130 outputs, for receiving described pulse triggering signal circulation output three condition switching signal.
Dimming resistor circuit 150 is electrically connected to block switch circuit 140 outputs, for according to three kinds of different resistance resistance of the corresponding formation of described three condition switching signal.
Constant-current control circuit 160 working power ends are electrically connected to rectification circuit 110 outputs, constant-current control circuit 160 light modulation inputs are electrically connected to dimming resistor circuit 150, for according to three kinds of different duty pulse-width signals of described three kinds of corresponding output of different resistance resistance.
Power amplification circuit 180 working power ends are electrically connected to rectification circuit 110 outputs, and power amplification circuit 180 inputs are electrically connected to constant-current control circuit 160 outputs, for described pulse-width signal is carried out to power amplification.
Pulse transformer circuit 170 inputs are electrically connected to the auxiliary winding feedback signal sampling end of constant-current control circuit 160, rectification circuit 110 outputs respectively, power amplification circuit 180 outputs are electrically connected to, pulse transformer circuit 170 outputs are electrically connected to LED lamp 300, for LED lamp 300 being carried out to three-stage dimming according to three kinds of big or small drive currents of difference of the corresponding formation of described three kinds of different duty pulse-width signals.
Circuit theory diagrams in conjunction with a kind of high-powered LED lamp three-stage dimming circuit of the utility model embodiment shown in Fig. 2.
Rectification circuit 110 comprises rectifier bridge DB, filter capacitor C7.Rectifier bridge DB input termination external ac power source 200, rectifier bridge DB input is electrically connected to external ac power source 200 live wire L and zero line N respectively, and external ac power source 200 can be provided by civil power, and its output voltage size is 180-264V.Filter capacitor C7 is in parallel with rectifier bridge DB output.
Accumulator 120 comprises resistance R 26, resistance R 28, diode D8, diode D10 and capacitor C 24.Diode D8 positive pole meets external ac power source 200 live wire L, diode D8 negative pole connecting resistance R26 is anodal to diode D10, diode D10 negative pole is electrically connected to block switch circuit 140 working power ends (block switch chip IC 2 positive sources 5), capacitor C 24 one end respectively, capacitor C 24 other end ground connection, the second resistance R 28 is in parallel with capacitor C 24.As preferred embodiment, the 120 formation retention times of accumulator are the DC power supply of 10 seconds.
Pulsed triggering circuit 130 comprises diode D8, voltage stabilizing didoe D9, resistance R 26, resistance R 27 and capacitor C 22.Diode D8 is anodal to be electrically connected to external ac power source 200 live wire L, and diode DB negative pole connecting resistance R26 is to voltage stabilizing didoe D9 negative pole, voltage stabilizing didoe D9 plus earth, and capacitor C 22 and resistance R 27 are in parallel with voltage stabilizing didoe D9 respectively.Suppose that externally AC power 200 inputs arrange mains switch,, whenever described mains switch disconnects closure once, pulsed triggering circuit 130 correspondingly forms a pulse triggering signal.
Block switch circuit 140 comprises that model is block switch chip IC 2, resistance R 29, the capacitor C 26 of TC2608.Block switch chip IC 2 input end of clock 4 are electrically connected to resistance R 29 one end, capacitor C 26 one end respectively, capacitor C 26 other end ground connection, resistance R 29 other ends are electrically connected to pulsed triggering circuit 130 outputs, be that resistance R 29 other ends are connected with voltage stabilizing didoe D9 negative electricity, block switch chip IC 2 positive sources 5 are electrically connected to accumulator 120 output head anodes, block switch chip IC 2 power cathodes 1, mode selection terminal 6 be ground connection respectively, and block switch chip IC 2 outputs 2,8 are electrically connected to dimming resistor circuit 150 respectively.Block switch chip IC 2 reset terminals 3, output 7 are distinguished unsettled.
When the pulse triggering signal of block switch chip IC 2 input end of clock 4 received pulse circuits for triggering 130 outputs for the first time, block switch chip IC 2 output 2,8 output the first status switch signals, output 2 is low level, output 8 is high level; When the pulse triggering signal of block switch chip IC 2 input end of clock 4 received pulse circuits for triggering 130 outputs for the second time, block switch chip IC 2 output 2,8 output the second status switch signals, output 2 is high level, output 8 is low level; When the pulse triggering signal of block switch chip IC 2 input end of clock 4 received pulse circuits for triggering 130 outputs for the second time, block switch chip IC 2 output 2,8 output third state switching signals, output 2 is low level, output 8 is low level; When the pulse triggering signal of the 4th received pulse circuits for triggering of block switch chip IC 2 input end of clock 4 130 outputs, block switch chip IC 2 output 2,8 output the first status switch signals, rule circulation according to this.
Dimming resistor circuit 150 comprises resistance R 37, resistance R 36, resistance R 35, resistance R 34, resistance R 33, resistance R 32, triode Q5, triode Q4, triode Q3, diode D11, diode D12.Triode Q5 collector electrode is electrically connected to resistance R 37, triode Q5 grounded emitter, and triode Q5 base stage connecting resistance R35 is to block switch circuit 140 first outputs, and triode Q5 base stage connecting resistance R35 is to block switch chip IC 2 outputs 2.Transistor collector Q4 is electrically connected to resistance R 36, transistor collector Q4 grounded emitter, and transistor collector Q4 base stage is electrically connected to triode Q3 collector electrode.Transistor collector Q3 connecting resistance R34 is to block switch circuit 140 second outputs, be that transistor collector Q3 connecting resistance R34 is to block switch chip IC 2 outputs 8, transistor collector Q3 grounded emitter, parallel resistance R33 between transistor collector Q3 emitter and transistor collector Q3 base stage, transistor collector Q3 base stage is electrically connected to resistance R 32 one end; Resistance R 32 other ends are connected with diode D11 negative pole, diode D12 negative electricity respectively, diode D11 is anodal to be electrically connected to block switch circuit 140 first outputs, being that diode D11 is anodal is electrically connected to block switch chip IC 2 outputs 2, diode D12 is anodal to be electrically connected to block switch circuit 140 second outputs, and diode D12 is anodal is electrically connected to block switch chip IC 2 outputs 8.
When block switch chip IC 2 output 2,8 output the first status switch signals, be that output 2 is low level, output 8 is high level, and triode Q3 conducting, triode Q4 close, triode Q5 closes, and it is infinitely-great resistance that dimming resistor circuit 150 forms resistance in theory; When block switch chip IC 2 output 2,8 output the second status switch signals, be that output 2 is high level, output 8 is low level, triode Q3 conducting, triode Q4 close, triode Q5 conducting, the resistance that dimming resistor circuit 150 forms resistance is the resistance of resistance R 37, the resistance of supposing resistance R 37 is 430 kilo-ohms, and dimming resistor circuit 150 formation resistances are the resistance of 430 kilo-ohms; When block switch chip IC 2 output 2,8 output third state switching signals, be that output 2 is low level, output 8 is low level, triode Q3 closes, triode Q4 conducting, triode Q5 are closed, the resistance that dimming resistor circuit 150 forms resistance is the resistance of resistance R 36, the resistance of supposing resistance R 37 is 200 kilo-ohms, and dimming resistor circuit 150 formation resistances are the resistance of 200 kilo-ohms.
Constant-current control circuit 160 comprises that model is constant current control chip IC1, capacitor C 13, capacitor C 14, the resistance R 13 of BP3318, resistance R 22.Constant current control chip IC1 positive source 2 connecting resistance R13 are to rectification circuit 110 outputs (rectifier bridge DB output head anode), constant current control chip IC1 power cathode 6 ground connection, constant current control chip IC1 loop compensation end 1 connects capacitor C 13 to ground, constant current control chip IC1 current sample end 4 connecting resistance R22 are to ground, the auxiliary winding feedback signal sampling end 3 of constant current control chip IC1 is electrically connected to pulse transformer circuit 170 inputs, constant current control chip IC1 light modulation input 7 connects respectively dimming resistor circuit 150, capacitor C 14 is to ground, be light modulation input 7 with respectively with resistance R 36, resistance R 37 one end are electrically connected to, constant current control chip IC1 output 5 connects power amplification circuit 180 inputs.Constant current control chip IC1 crosses thermal conditioning temperature setting, and to put end 8 unsettled.
When dimming resistor circuit 150 forms resistance in theory, be infinitely-great resistance, constant current control chip IC1 light modulation input 7 connects infinitely-great resistance to ground, be equivalent to light modulation input 7 unsettled, constant current control chip IC1 output 5 output the first duty ratio pulse-width signals; When dimming resistor circuit 150 forms resistances, be the resistance of 430 kilo-ohms, constant current control chip IC1 light modulation input 7 connects the resistance of 430 kilo-ohms to ground, constant current control chip IC1 output 5 output the second duty ratio pulse-width signals; When dimming resistor circuit 150 forms resistances, be the resistance of 200 kilo-ohms, constant current control chip IC1 light modulation input 7 connects the resistance of 200 kilo-ohms to ground, constant current control chip IC1 output 5 output the 3rd duty ratio pulse-width signals.The magnitude relationship of the first duty ratio, the second duty ratio, the 3rd duty ratio is: the first duty ratio is greater than the second duty ratio, and the second duty ratio is greater than the 3rd duty ratio.
Power amplification circuit 180 comprises triode Q1, triode Q2, resistance R 19 and resistance R 18, triode Q1 base stage, triode Q2 base stage is electrically connected to constant-current control circuit 160 outputs (constant current control chip IC1 output 5) respectively, triode Q1 emitter, triode Q2 emitter is electrically connected to resistance R 19 one end respectively, resistance R 19 other ends are electrically connected to pulse transformer circuit 170 inputs (being metal-oxide-semiconductor grid), triode Q1 collector electrode is electrically connected to constant-current control circuit 160 working power ends anodal (triode Q1 collector electrode and constant current control chip IC1 positive source 2), triode Q2 grounded collector, triode Q2 collector electrode, parallel resistance R18 between base stage.
The pulse-width signal of 180 pairs of constant current control chip IC1 outputs of power amplification circuit, 5 outputs carries out power amplification, and the driving power that makes constant current control the pulse-width signal of IC1 output 5 outputs is brought up to 200W by 60W.
Pulse transformer circuit 170 comprises pulse transformer T, metal-oxide-semiconductor V, resistance R 9, resistance R 22, diode D5, diode D7, diode D6, capacitor C 8, capacitor C 20, capacitor C 10, resistance R 15, resistance R 17, resistance R 13.Pulse transformer T armature winding different name end is electrically connected to resistance R 9 one end, capacitor C 8 one end, resistance 13 one end, rectification circuit 110 output head anodes (rectifier bridge DB output head anode) respectively, and pulse transformer T armature winding Same Name of Ends respectively, metal-oxide-semiconductor V drain electrode anodal with diode D5 is electrically connected to; Diode D5 negative pole is electrically connected to resistance R 9 other ends, capacitor C 8 other ends respectively.Pulse transformer T secondary winding Same Name of Ends is electrically connected to diode D7 is anodal, and diode D7 negative pole is connected with capacitor C 20 one end, and capacitor C 20 other ends are electrically connected to pulse transformer T secondary winding different name end.The auxiliary Motor Winding Same Name of Ends of pulse transformer T is anodal with diode D6, resistance R 15 one end are electrically connected to, and pulse transformer T assists winding different name end ground connection.Resistance R 15 other ends are electrically connected to the auxiliary winding feedback signal sampling end (constant current control chip IC1 assists winding feedback signal sampling end 3) of constant-current control circuit 160, resistance R 17 one end respectively, resistance R 17 other end ground connection, diode D6 negative pole is electrically connected to capacitor C 10 one end, resistance R 13 other ends respectively, capacitor C 10 other end ground connection.Metal-oxide-semiconductor V grid connects power amplification circuit 180 outputs, and metal-oxide-semiconductor source electrode connecting resistance R22 is to ground.Diode D7 negative pole, pulse transformer T secondary winding different name end connect respectively LED+ end and the LED-end of LED lamp.
When constant current control chip IC1 output 5 output the first duty ratio pulse-width signals, pulse transformer T secondary winding is exported the first drive current to 300 power supplies of LED lamp; When constant current control chip IC1 output 5 output the second duty ratio pulse-width signals, pulse transformer T secondary winding is exported the second drive current to 300 power supplies of LED lamp; When constant current control chip IC1 output 5 output the 3rd duty ratio pulse-width signals, pulse transformer T secondary winding output the 3rd drive current is to 300 power supplies of LED lamp.Because the first duty ratio is greater than the second duty ratio, the second duty ratio is greater than the 3rd duty ratio, and therefore the first drive current is greater than the second drive current, and the second drive current is greater than the 3rd drive current.Realization is carried out the adjusting of three kinds of different illumination intensity to high-powered LED lamp 300.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without also giving all execution modes.And among the protection range that the apparent variation of being extended out thus or change are still created in the utility model.
Claims (10)
1. a high-powered LED lamp three-stage dimming circuit, is characterized in that, comprising:
Rectification circuit, described rectification circuit input end is electrically connected to external ac power source, for the alternating current of external ac power source input is converted to direct current;
Pulsed triggering circuit, described pulsed triggering circuit input is electrically connected to external ac power source, is used to form pulse triggering signal;
Accumulator, described accumulator input is electrically connected to external ac power source, is used to form the DC power supply that the retention time is more than or equal to 8 seconds;
Block switch circuit, described block switch circuit work power end is electrically connected to described accumulator output, described block switch circuit clock input is electrically connected to described pulsed triggering circuit output, for receiving described pulse triggering signal circulation output three condition switching signal;
Dimming resistor circuit, described dimming resistor circuit is electrically connected to described block switch circuit output end, for according to three kinds of different resistance resistance of the corresponding formation of described three condition switching signal;
Constant-current control circuit, described constant-current control circuit working power end is electrically connected to described rectification circuit output end, described constant-current control circuit light modulation input is electrically connected to described dimming resistor circuit, for according to three kinds of different duty pulse-width signals of described three kinds of corresponding output of different resistance resistance;
Power amplification circuit, described power amplification circuit working power end is electrically connected to described rectification circuit output end, and described power amplification circuit input is electrically connected to described constant-current control circuit output, for described pulse-width signal is carried out to power amplification;
Pulse transformer circuit, described pulse transformer circuit input end is electrically connected to the auxiliary winding feedback signal sampling end of described constant-current control circuit, described rectification circuit output end, described power amplification circuit output respectively, described pulse transformer circuit output end is electrically connected to LED lamp, for LED lamp being carried out to three sections of circulation light modulations according to three kinds of big or small drive currents of difference of the corresponding formation of described three kinds of different duty pulse-width signals.
2. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, is characterized in that, described rectification circuit comprises rectifier bridge, filter capacitor,
Described rectifier bridge input termination external ac power source, described filter capacitor is in parallel with described rectification bridge output end.
3. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, is characterized in that, described pulsed triggering circuit comprises diode, voltage stabilizing didoe, the first resistance, the second resistance and electric capacity,
Described diode cathode connects external ac power source, and described diode cathode connects described the first resistance to described voltage stabilizing didoe negative pole, described voltage stabilizing didoe plus earth, and described electric capacity and described the second resistance are in parallel with described voltage stabilizing didoe respectively.
4. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, is characterized in that, described block switch circuit comprises that model is block switch chip, resistance, the electric capacity of TC2608,
Described block switch chip input end of clock is electrically connected to described resistance one end, electric capacity one end respectively, described electric capacity other end ground connection, the described resistance other end is electrically connected to described pulsed triggering circuit output, described block switch chip power is anodal to be electrically connected to described accumulator output head anode, described block switch chip power negative pole, mode selection terminal be ground connection respectively, and described block switch chip output is electrically connected to described dimming resistor circuit.
5. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, it is characterized in that, described dimming resistor circuit comprises the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the first triode, the second triode, the 3rd triode, the first diode, the second diode
Described the first transistor collector is electrically connected to the first resistance, grounded emitter, and base stage connects described the 3rd resistance to described block switch circuit the first output; Described the second transistor collector is electrically connected to the second resistance, grounded emitter, and base stage is electrically connected to described the 3rd transistor collector; Described the 3rd transistor collector connects described the 4th resistance to described block switch circuit the second output, grounded emitter, and described the 5th resistance in parallel between emitter and base stage, base stage is electrically connected to described the 6th resistance one end; Described the 6th resistance other end is electrically connected to described the first diode cathode, described the second diode cathode respectively, described the first diode cathode is electrically connected to described block switch circuit the first output, and described the second diode cathode is electrically connected to described block switch circuit the second output.
6. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, is characterized in that, described constant-current control circuit comprises that model is constant current control chip, the first electric capacity, the second electric capacity, the first resistance, the second resistance of BP3318,
Described constant current control chip positive source connects the first resistance to described rectification circuit output end, described constant current control chip power cathode ground connection, described constant current control chip loop compensation termination the first electric capacity is to ground, described constant current control chip current sample termination the second resistance is to ground, the auxiliary winding feedback signal sampling end of described constant current control chip is electrically connected to described pulse transformer circuit input end, described constant current control chip light modulation input connects respectively described dimming resistor circuit, the second electric capacity is to ground, power amplification circuit input described in described constant current control chip output termination.
7. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, it is characterized in that, described pulse transformer circuit comprises pulse transformer, metal-oxide-semiconductor, the first resistance, the second resistance, the 3rd resistance, the 4th resistance, the 5th resistance, the first diode, the second diode, the 3rd diode, the first electric capacity, the second electric capacity, the 3rd electric capacity
Described pulse transformer armature winding different name end is electrically connected to first resistance one end, first electric capacity one end, the 5th resistance one end, described rectification circuit output end positive pole respectively, described pulse transformer armature winding Same Name of Ends is electrically connected to described the first diode cathode, the drain electrode of described metal-oxide-semiconductor respectively, and described the first diode cathode is electrically connected to the first resistance other end, the first electric capacity other end respectively;
Described pulse transformer secondary winding Same Name of Ends is electrically connected to described the second diode cathode, and described the second diode cathode is connected with described second electric capacity one end, and described pulse transformer secondary winding different name end is electrically connected to the described second electric capacity other end;
The auxiliary Motor Winding Same Name of Ends of described pulse transformer is electrically connected to the 3rd diode cathode, the 3rd resistance one end, and described pulse transformer is assisted winding different name end ground connection;
Described the 3rd resistance other end is electrically connected to the auxiliary winding feedback signal sampling end of described constant-current control circuit, the 4th resistance one end respectively, described the 4th resistance other end ground connection, described the 3rd diode cathode is electrically connected to the 3rd electric capacity one end, described the 5th resistance other end respectively, described the 3rd electric capacity other end ground connection, described metal-oxide-semiconductor grid connects described power amplification circuit output, and described metal-oxide-semiconductor source electrode connects the second resistance to ground.
8. a kind of high-powered LED lamp three-stage dimming circuit according to claim 1, is characterized in that, described accumulator comprises the first resistance, the second resistance, the first diode, the second diode and electric capacity,
Described the first diode cathode connects external ac power source, described the first diode cathode connects described the first resistance to described the second diode cathode, described the second diode cathode is rectified the utmost point with described block switch circuit work power respectively, described electric capacity one end is electrically connected to, described electric capacity other end ground connection, described the second resistance and described Capacitance parallel connection.
9. according to a kind of high-powered LED lamp three-stage dimming circuit described in claim 1 or 8, it is characterized in that, it is the 8-20 DC power supply of second that described accumulator is used to form the retention time.
10. according to the arbitrary described a kind of high-powered LED lamp three-stage dimming circuit of claim 1-8, it is characterized in that, described power amplification circuit comprises the first triode, the second triode, the first resistance and the second resistance,
Described the first transistor base, described the second transistor base are electrically connected to described constant-current control circuit output respectively, described the first transistor emitter, the second transistor emitter are electrically connected to described first resistance one end respectively, the described first resistance other end is electrically connected to described pulse transformer circuit input end, described the first transistor collector is electrically connected to described constant-current control circuit working power end is anodal, described the second transistor collector ground connection, described the second resistance in parallel between described the second transistor collector, base stage.
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| CN201420462677.2U CN204014214U (en) | 2014-08-15 | 2014-08-15 | A kind of high-powered LED lamp three-stage dimming circuit |
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| CN201420462677.2U CN204014214U (en) | 2014-08-15 | 2014-08-15 | A kind of high-powered LED lamp three-stage dimming circuit |
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| CN204014214U true CN204014214U (en) | 2014-12-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106028500A (en) * | 2016-05-18 | 2016-10-12 | 厦门佰明光电股份有限公司 | Three-segment type LED lamp control circuit with adjustable output |
| CN108282928A (en) * | 2017-03-13 | 2018-07-13 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using AC power |
| CN109237374A (en) * | 2018-08-24 | 2019-01-18 | 北京云狐时代科技有限公司 | A kind of lighting system for airport |
| CN114205945A (en) * | 2021-11-24 | 2022-03-18 | 广东新昇电业科技股份有限公司 | Four-in-one dimming circuit adopting primary side feedback and constant voltage |
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2014
- 2014-08-15 CN CN201420462677.2U patent/CN204014214U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106028500A (en) * | 2016-05-18 | 2016-10-12 | 厦门佰明光电股份有限公司 | Three-segment type LED lamp control circuit with adjustable output |
| CN106028500B (en) * | 2016-05-18 | 2018-05-18 | 厦门佰明光电股份有限公司 | A kind of adjustable three-stage LED light control circuit of output |
| CN108282928A (en) * | 2017-03-13 | 2018-07-13 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using AC power |
| CN108449829A (en) * | 2017-03-13 | 2018-08-24 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using DC power supply |
| CN108282928B (en) * | 2017-03-13 | 2019-08-06 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using AC power source |
| CN108449829B (en) * | 2017-03-13 | 2019-08-06 | 刘胜泉 | A kind of tri-state frequency conversion LED power output power controlling circuit powered using DC power supply |
| CN109237374A (en) * | 2018-08-24 | 2019-01-18 | 北京云狐时代科技有限公司 | A kind of lighting system for airport |
| CN114205945A (en) * | 2021-11-24 | 2022-03-18 | 广东新昇电业科技股份有限公司 | Four-in-one dimming circuit adopting primary side feedback and constant voltage |
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