CN103458557A - LED drive control circuit and LED lamp - Google Patents
LED drive control circuit and LED lamp Download PDFInfo
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Abstract
The invention is applicable to the field of LED driving and provides an LED drive control circuit and an LED lamp. The LED drive control circuit comprises an energy storage inductor L1, a dimming signal generation module, a rectifier diode D1, a sampling resistor R13, a drive control module, a switch tube, and an energy storage capacitor C1. When a rectifier filter module outputs undervoltage or an LED load operates under overvoltage, the switch tube is controlled to cut off for undervoltage or overvoltage protection for the LED load; when a user needs to adjust brightness of the LED load, switching duty ratio of the switch tube is controlled to adjust current flowing into the rectifier diode D1; accordingly, efficient analog dimming is performed on the LED load to save power consumption, and the problem that the prior existing circuit is complex in structure, high in power consumption and low in constant current control efficiency is solved.
Description
Technical field
The invention belongs to LED and drive field, relate in particular to a kind of LED Drive and Control Circuit and LED light fixture.
Background technology
At present, LED, as a kind of new type light source, because it has advantages of that energy consumption is low, brightness is strong and the life-span is long, has been widely used in every field.
For make the LED light fixture can stablize, efficiently and for a long time for people provide illumination, prior art generally adopts switching power circuit to realize to LED that constant current drives and controls, thus make the LED light fixture can steady operation in a fixing current margin.Yet prior art but can't realize brightness regulation according to the demand of different application occasion when the LED light fixture being realized to constant current drives, and causes power consumption too high; In addition, the switching power circuit complex structure, volume is large and easily produce interference, and then has reduced the constant current control efficiency to LED.
In sum, there is the problem that circuit structure is complicated, power consumption is high and the constant current control efficiency is low in prior art.
Summary of the invention
The object of the present invention is to provide a kind of LED Drive and Control Circuit, be intended to solve the problem that the existing circuit structure of prior art is complicated, power consumption is high and the constant current control efficiency is low.
The present invention is achieved in that a kind of LED Drive and Control Circuit, comprises transformer and rectification filtering module, and is connected with AC power and LED load, and described LED Drive and Control Circuit also comprises:
Energy storage inductor L1, the output of the described rectification filtering module of input termination of described energy storage inductor L1, for the direct current that receives the output of described rectification filtering module and carry out energy storage;
The dim signal generation module, the input of the described energy storage inductor L1 of input termination of described dim signal generation module, for from described rectification filtering module, obtaining electric energy, and export corresponding dim signal according to user's light modulation operation;
Rectifier diode D1, the anode of described rectifier diode D1 connects the output of described energy storage inductor L1, and the direct current of exporting for the output to from described energy storage inductor L1 carries out secondary rectification processing output;
Sampling resistor R13, the input of described sampling resistor R13 and output connect respectively the negative electrode of described rectifier diode D1 and the input of described LED load, for the operating current to described LED load, are sampled;
Drive control module, the dim signal input of described drive control module, the overvoltage test side, under-voltage test side and oscillator signal end connect respectively the output of described dim signal generation module, the negative electrode of described rectifier diode D1, the input of described energy storage inductor L1 and output, electric current induction anode and electric current induction negative terminal connect respectively input and the output of described sampling resistor R13, be used for output pick-off signal when the under-voltage output of described rectification filtering module or the work of described LED load overvoltage, and export corresponding switch controlling signal according to the sample rate current of described dim signal and sampling resistor R13,
Switching tube, the input of described switching tube, control end and output connect respectively switch control end and the current detecting end of the output of described energy storage inductor L1, described drive control module, for according to described pick-off signal or described switch controlling signal, realizing cut-off or adjust the size of current of the duty cycle of switching of self with the anode of the described rectifier diode D1 of control inflow;
Storage capacitor C1, the negative electrode of the described rectifier diode D1 of the first termination of described storage capacitor C1, the output of the second end and described LED load is connected to ground altogether, for when the described switching tube conducting by described sampling resistor R13 to described LED load supplying.
Another object of the present invention also is to provide a kind of LED light fixture that comprises described LED Drive and Control Circuit.
In the present invention, comprise described energy storage inductor L1 by employing, described dim signal generation module, described rectifier diode D1, described sampling resistor R13, described drive control module, the LED Drive and Control Circuit of described switching tube and described storage capacitor C1, end to reach the purpose of the LED load being carried out to under-voltage or overvoltage protection by controlling described switching tube when the under-voltage output of described rectification filtering module or the work of LED load overvoltage, and when the user need to carry out brightness regulation to described LED load, can regulate the size of current that flows into described rectifier diode D1 by the duty cycle of switching of controlling described switching tube, and then described LED load is realized to efficient simulation light modulation is to save power consumption, thereby solved the existing circuit structure complexity of prior art, the problem that power consumption is high and the constant current control efficiency is low.
The accompanying drawing explanation
Fig. 1 is the modular structure figure of the LED Drive and Control Circuit that provides of the embodiment of the present invention;
Fig. 2 is the exemplary circuit structure chart of the LED Drive and Control Circuit that provides of the embodiment of the present invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
In embodiments of the present invention, comprise energy storage inductor L1 by employing, the dim signal generation module, rectifier diode D1, sampling resistor R13, drive control module, the LED Drive and Control Circuit of switching tube and storage capacitor C1, end to reach the purpose of the LED load being carried out to under-voltage or overvoltage protection by controlling described switching tube when the under-voltage output of rectification filtering module or the work of LED load overvoltage, and when the user need to carry out brightness regulation to the LED load, can regulate the size of current that flows into rectifier diode D1 by the duty cycle of switching of controlling described switching tube, and then the LED load is realized to efficient simulation light modulation is to save power consumption.
Fig. 1 shows the modular structure of the LED Drive and Control Circuit that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows:
LED Drive and Control Circuit 100 comprises transformer T1 and rectification filtering module 101, and is connected with AC power 200 and LED load 300, and the LED Drive and Control Circuit also comprises:
Energy storage inductor L1, the output of the input termination rectification filtering module 101 of this energy storage inductor L1, for the direct current that receives rectification filtering module 101 output and carry out energy storage;
Dim signal generation module 102, the input of the input termination energy storage inductor L1 of this dim signal generation module 102, for from rectification filtering module 101, obtaining electric energy, and export corresponding dim signal according to user's light modulation operation;
Rectifier diode D1, the anode of this rectifier diode D1 connects the output of energy storage inductor L1, and the direct current of exporting for the output to from energy storage inductor L1 carries out secondary rectification processing output;
Sampling resistor R13, the input of this sampling resistor R13 and output connect respectively the negative electrode of rectifier diode D1 and the input of LED load 300, for the operating current to LED load 300, are sampled;
Storage capacitor C1, the negative electrode of the first termination rectifier diode D1 of this storage capacitor C1, the output of the second end and LED load 300 is connected to ground altogether, for when switching tube 104 conducting by sampling resistor R13 to LED load 300 power supplies.
In embodiments of the present invention, AC power 200 output 220V electric mains, the first end 1 of the armature winding of transformer T1 and the second end 2 connect respectively the live wire of AC power 200+and zero line-, rectification filtering module 101 comprises rectifier bridge BR1 and filter capacitor C2, the first end 1 of rectifier bridge BR1 and the second end 2 connect respectively first end 3 and second end 4 of the secondary winding of transformer T1, the output 3 of rectifier bridge BR1 and the positive pole of filter capacitor C2 are connected to the input of energy storage inductor L1 altogether, and the earth terminal 4 of rectifier bridge BR1 and the equal ground connection of negative pole of filter capacitor C2.
LED Drive and Control Circuit 100 also comprises fuse F1; be connected in the live wire of AC power 200+and the first end 1 of the armature winding of transformer T1 between, for quick fuse when short trouble appears in AC power 200 to protect whole LED Drive and Control Circuit 100.
Fig. 2 shows the exemplary circuit structure of the LED Drive and Control Circuit that the embodiment of the present invention provides, and for convenience of explanation, only shows the part relevant to the embodiment of the present invention, and details are as follows:
As one embodiment of the present invention, dim signal generation module 102 comprises:
Resistance R 1, resistance R 2, three terminal regulator U1, resistance R 3 and adjustable resistance R4;
The input that the first end of resistance R 1 is dim signal generation module 102, the second end of resistance R 1 and the first end of resistance R 2 are connected to the input VIN of three terminal regulator U1 altogether, the second end ground connection of resistance R 2, the earth terminal GND ground connection of three terminal regulator U1, resistance R 3 is connected between the first end of the output VOUT of three terminal regulator U1 and adjustable resistance R4, the output that the first end of adjustable resistance R4 is dim signal generation module 102, the second end ground connection of adjustable resistance R4.Wherein, the three terminal regulator that three terminal regulator U1 is LM78 series, according to different output voltage needs, can select the three terminal regulator of any one model in LM78 series.
As one embodiment of the present invention, drive control module 103 comprises:
Resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, driver U2, resistance R 8, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, resistance R 11 and resistance R 12;
The under-voltage test side that the power supply input pin VIN of driver U2 is drive control module 103, the power supply input pin VIN of the driver connected U2 of first end of resistance R 5, the second end of resistance R 5 and the first end of resistance R 6 are connected to the under-voltage detection pin nDIM of driver U2 altogether, the second end ground connection of resistance R 6, the oscillator signal end that the first end of resistance R 7 is drive control module 103, the second end of resistance R 7 and the first end of capacitor C 3 are connected to the vibration pin RCT of driver U2 altogether, the second end ground connection of capacitor C 3, capacitor C 4 is connected between the compensation pin COMP and simulation lower margin AGND of driver U2, and the simulation lower margin AGND ground connection of driver U2, the dim signal input that the simulation light modulation pin CSH of driver U2 is drive control module 103, and the empty pin NC sky of driver U2 connects, the driving pin GATE of driver U2 and main switch current detecting pin IS are respectively switch control end and the current detecting end of drive control module 103, resistance R 8 is connected between the main switch current detecting pin IS and ground of driver U2, the first end of the first end of resistance R 9 and the resistance R 10 LED electric current of driver connected U2 is respectively responded to positive pin HSP and the negative pin HSN of LED electric current induction, the second end of resistance R 9 and the second end of resistance R 10 are respectively electric current induction anode and the electric current induction negative terminal of drive control module 103, capacitor C 5 is connected between the internal voltage regulator output pin VCC and power lower margin PGND of driver U2, and power lower margin PGND ground connection, the overvoltage protection pin OVP of driver U2, the first end of the first end of capacitor C 6 and resistance R 11 is connected to the first end of resistance R 12 altogether, the equal ground connection of the second end of the second end of capacitor C 6 and resistance R 11, the overvoltage test side that the second end of resistance R 12 is drive control module 103.Wherein, driver U2 is that the LED that model is LM3429 drives control chip.
As one embodiment of the present invention, switching tube 104 is N-channel MOS pipe Q1, and grid, drain electrode and the source electrode of N-channel MOS pipe Q1 are respectively control end, input and the output of switching tube 104.
Below in conjunction with operation principle, the LED Drive and Control Circuit is described further:
The alternating current of AC power 200 outputs is undertaken after filtering is processed exporting direct current by transformer T1 transformation, rectifier bridge BR1 rectification and filter capacitor C2, carry out energy storage after receiving this direct current by energy storage inductor L1, and then the output direct current provides the groundwork clock by the oscillating circuit consisted of resistance R 7 and capacitor C 3 for driver U2 to resistance R 7.Meanwhile, the direct current of 6 pairs of rectification filtering modules of resistance R 5 and resistance R 101 output carries out the under-voltage detection pin nDIM of enter drive U2 after dividing potential drop, by driver U2, is started rectification filtering module 101 is carried out to under-voltage detection; In addition, resistance R 1 and resistance R 2 are also carried out the input VIN of input three terminal regulator U1 after dividing potential drop to the direct current of rectification filtering module 101 output, carry out voltage stabilizing by three terminal regulator U1 and process the direct current that rear output one has fixed voltage value, then made the simulation light modulation pin CSH of enter drive U2 after further dividing potential drop by resistance R 3 and adjustable resistance R4, in the time need to being regulated the luminosity of LED load, the user can pass through to adjust the voltage of the resistance of adjustable resistance R4 with the simulation light modulation pin CSH of control driver U2.Rectifier diode D1 carries out exporting respectively sampling resistor R13, storage capacitor C1 and resistance R 12 to after the secondary rectification to the direct current of the output output of energy storage inductor L1; carried out the overvoltage protection pin OVP of enter drive U2 after dividing potential drop by the direct current after resistance R 12 and 11 pairs of secondary rectifications of resistance R, started the operating voltage of LED load is carried out to the overvoltage detection by driver U2.
When the voltage of the under-voltage detection pin nDIM of driver U2 during lower than the under-voltage threshold value (output voltage that is rectification filtering module 101 is too low) of driver U2; driver U2 can control it and drive pin GATE output low level to control N-channel MOS pipe Q1 cut-off; and whole drive control module 103 quits work; rectifier diode D1 no current output; LED load 300 also can't obtain operating current from sampling resistor R13; so LED load 300 quits work, reach the purpose of under-voltage protection.
When the output voltage of rectification filtering module 101 is too high, the cathode voltage of rectifier diode D1 also can be thereupon too high, the voltage of the overvoltage protection pin OVP of driver U2 can be higher than the overvoltage threshold of driver U2, now, driver U2 can drive pin GATE to export a high level by it to make the Q1 conducting of N-channel MOS pipe and duty cycle of switching reach peak, N-channel MOS pipe Q1 is pulled to resistance R 8 from the anode of rectifier diode D1 by direct current, and export ground to, and then the cathode voltage that makes rectifier diode D1 is reduced to the conducting voltage of LED load, thereby LED load 300 is quit work, reach the purpose of overvoltage protection.
Output voltage at rectification filtering module 101 is normal, and LED load when normal operation, if the user need to carry out the luminosity adjusting to the LED load, can be adjusted the resistance of adjustable resistance R4.When the resistance of adjustable resistance R4 becomes large, the voltage of the simulation light modulation pin CSH of driver U2 raises, driver U2 understands the voltage of its driving pin of corresponding rising GATE, and then the duty cycle of switching of N-channel MOS pipe Q1 is increased, the ON time of N-channel MOS pipe Q1 in switch periods is elongated, shut-in time shortens, and when conducting energy storage inductor L1 store electrical energy, storage capacitor C1 passes through sampling resistor R13 to the LED load supplying, when closing, be by rectifier diode D1 and sampling resistor R13, to be the LED load supplying by the electric energy after the direct current stack of the back electromotive force of energy storage inductor L1 and rectification filtering module 101 outputs.Because the ON time of N-channel MOS pipe Q1 in switch periods is greater than the shut-in time, and the electric energy in storage capacitor C1 is significantly less than the electric energy after the direct current stack of the back electromotive force of energy storage inductor L1 and rectification filtering module 101 outputs, therefore, when the resistance of resistance R 4 becomes large, the brightness meeting of LED load weakens.Otherwise, when the resistance of adjustable resistance R4 diminishes, the duty cycle of switching of N-channel MOS pipe Q1 reduces, the luminosity of LED load can strengthen.In addition, the LED electric current of driver U2 is responded to the negative pin HSN of positive pin HSP and LED electric current induction, by sampling resistor R13, the operating current of LED load is carried out to real-time sampling, and the internal reference current value using sampled current value as driver U2, when the resistance of resistance R 4 is tuned up and the voltage of the simulation light modulation pin CSH of driver U2 while having surpassed the input threshold voltage of driver U2, for fear of driving pin GATE correspondingly to export too high voltage, make the duty cycle of switching of N-channel MOS pipe Q1 too high and damage, driver U2 can control the high bias voltage value that the voltage that drives pin GATE remain on switching tube 104 by its internal reference current value, to reach the effect of protection N-channel MOS pipe Q1.
In embodiments of the present invention, according to the LED number comprised in the LED load, under-voltage threshold value and the overvoltage threshold of driver U2 also can correspondingly be adjusted.
In another embodiment of the present invention, switching tube 104 also can be NPN type triode, and base stage, the collector and emitter of NPN type triode are respectively control end, input and the output of switching tube 104.The user can select above-mentioned N-channel MOS pipe Q1 or NPN type triode as switching tube 104 according to different application demands.
The embodiment of the present invention also provides a kind of LED light fixture that comprises above-mentioned LED Drive and Control Circuit.
In embodiments of the present invention, comprise energy storage inductor L1 by employing, the dim signal generation module, rectifier diode D1, sampling resistor R13, drive control module, the LED Drive and Control Circuit of switching tube and storage capacitor C1, end to reach the purpose of the LED load being carried out to under-voltage or overvoltage protection by controlling described switching tube when the under-voltage output of rectification filtering module or the work of LED load overvoltage, and when the user need to carry out brightness regulation to the LED load, can regulate the size of current that flows into rectifier diode D1 by the duty cycle of switching of controlling described switching tube, and then the LED load is realized to efficient simulation light modulation is to save power consumption, thereby solved the existing circuit structure complexity of prior art, the problem that power consumption is high and the constant current control efficiency is low.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (8)
1. a LED Drive and Control Circuit, comprise transformer and rectification filtering module, and be connected with AC power and LED load, it is characterized in that, described LED Drive and Control Circuit also comprises:
Energy storage inductor L1, the output of the described rectification filtering module of input termination of described energy storage inductor L1, for the direct current that receives the output of described rectification filtering module and carry out energy storage;
The dim signal generation module, the input of the described energy storage inductor L1 of input termination of described dim signal generation module, for from described rectification filtering module, obtaining electric energy, and export corresponding dim signal according to user's light modulation operation;
Rectifier diode D1, the anode of described rectifier diode D1 connects the output of described energy storage inductor L1, and the direct current of exporting for the output to from described energy storage inductor L1 carries out secondary rectification processing output;
Sampling resistor R13, the input of described sampling resistor R13 and output connect respectively the negative electrode of described rectifier diode D1 and the input of described LED load, for the operating current to described LED load, are sampled;
Drive control module, the dim signal input of described drive control module, the overvoltage test side, under-voltage test side and oscillator signal end connect respectively the output of described dim signal generation module, the negative electrode of described rectifier diode D1, the input of described energy storage inductor L1 and output, electric current induction anode and electric current induction negative terminal connect respectively input and the output of described sampling resistor R13, be used for output pick-off signal when the under-voltage output of described rectification filtering module or the work of described LED load overvoltage, and export corresponding switch controlling signal according to the sample rate current of described dim signal and sampling resistor R13,
Switching tube, the input of described switching tube, control end and output connect respectively switch control end and the current detecting end of the output of described energy storage inductor L1, described drive control module, for according to described pick-off signal or described switch controlling signal, realizing cut-off or adjust the size of current of the duty cycle of switching of self with the anode of the described rectifier diode D1 of control inflow;
Storage capacitor C1, the negative electrode of the described rectifier diode D1 of the first termination of described storage capacitor C1, the output of the second end and described LED load is connected to ground altogether, for when the described switching tube conducting by described sampling resistor R13 to described LED load supplying.
2. LED Drive and Control Circuit as claimed in claim 1, is characterized in that, described dim signal generation module comprises:
Resistance R 1, resistance R 2, three terminal regulator, resistance R 3 and adjustable resistance R4;
The input that the first end of described resistance R 1 is described dim signal generation module, the second end of described resistance R 1 and the first end of described resistance R 2 are connected to the input of described three terminal regulator altogether, the second end ground connection of described resistance R 2, the earth terminal ground connection of described three terminal regulator, described resistance R 3 is connected between the first end of the output of described three terminal regulator and described adjustable resistance R4, the output that the first end of described adjustable resistance R4 is described dim signal generation module, the second end ground connection of described adjustable resistance R4.
3. LED Drive and Control Circuit as claimed in claim 1, is characterized in that, described drive control module comprises:
Resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, driver, resistance R 8, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, resistance R 11 and resistance R 12;
The under-voltage test side that the power supply input pin of described driver is described drive control module, the power supply input pin of the described driver of the first termination of described resistance R 5, the second end of described resistance R 5 and the first end of described resistance R 6 are connected to the under-voltage detection pin of described driver altogether, the second end ground connection of described resistance R 6, the oscillator signal end that the first end of described resistance R 7 is described drive control module, the second end of described resistance R 7 and the first end of described capacitor C 3 are connected to the vibration pin of described driver altogether, the second end ground connection of described capacitor C 3, described capacitor C 4 is connected between the compensation pin and simulation lower margin of described driver, and the simulation lower margin ground connection of described driver, the dim signal input that the simulation light modulation pin of described driver is described drive control module, and the empty pin sky of described driver connects, the driving pin of described driver and main switch current detecting pin are respectively switch control end and the current detecting end of described drive control module, described resistance R 8 is connected between the main switch current detecting pin and ground of described driver, the first end of the first end of described resistance R 9 and described resistance R 10 connects respectively the LED electric current of described driver and responds to positive pin and the negative pin of LED electric current induction, the second end of described resistance R 9 and the second end of described resistance R 10 are respectively electric current induction anode and the electric current induction negative terminal of described drive control module, described capacitor C 5 is connected between the internal voltage regulator output pin and power lower margin of described driver, and described power lower margin ground connection, the overvoltage protection pin of described driver, the first end of the first end of described capacitor C 6 and described resistance R 11 is connected to the first end of described resistance R 12 altogether, the equal ground connection of the second end of the second end of described capacitor C 6 and described resistance R 11, the overvoltage test side that the second end of described resistance R 12 is described drive control module.
4. LED Drive and Control Circuit as claimed in claim 1, is characterized in that, described switching tube is N-channel MOS pipe or NPN type triode.
5. a LED light fixture, is characterized in that, described LED light fixture comprises the LED Drive and Control Circuit, and described LED Drive and Control Circuit comprises transformer and rectification filtering module, and be connected with AC power and LED load, and described LED Drive and Control Circuit also comprises:
Energy storage inductor L1, the output of the described rectification filtering module of input termination of described energy storage inductor L1, for the direct current that receives the output of described rectification filtering module and carry out energy storage;
The dim signal generation module, the input of the described energy storage inductor L1 of input termination of described dim signal generation module, for from described rectification filtering module, obtaining electric energy, and export corresponding dim signal according to user's light modulation operation;
Rectifier diode D1, the anode of described rectifier diode D1 connects the output of described energy storage inductor L1, and the direct current of exporting for the output to from described energy storage inductor L1 carries out secondary rectification processing output;
Sampling resistor R13, the input of described sampling resistor R13 and output connect respectively the negative electrode of described rectifier diode D1 and the input of described LED load, for the operating current to described LED load, are sampled;
Drive control module, the dim signal input of described drive control module, the overvoltage test side, under-voltage test side and oscillator signal end connect respectively the output of described dim signal generation module, the negative electrode of described rectifier diode D1, the input of described energy storage inductor L1 and output, electric current induction anode and electric current induction negative terminal connect respectively input and the output of described sampling resistor R13, be used for output pick-off signal when the under-voltage output of described rectification filtering module or the work of described LED load overvoltage, and export corresponding switch controlling signal according to the sample rate current of described dim signal and sampling resistor R13,
Switching tube, the input of described switching tube, control end and output connect respectively switch control end and the current detecting end of the output of described energy storage inductor L1, described drive control module, for according to described pick-off signal or described switch controlling signal, realizing cut-off or adjust the size of current of the duty cycle of switching of self with the anode of the described rectifier diode D1 of control inflow;
Storage capacitor C1, the negative electrode of the described rectifier diode D1 of the first termination of described storage capacitor C1, the output of the second end and described LED load is connected to ground altogether, for when the described switching tube conducting by described sampling resistor R13 to described LED load supplying.
6. LED light fixture as claimed in claim 5, is characterized in that, described dim signal generation module comprises:
Resistance R 1, resistance R 2, three terminal regulator, resistance R 3 and adjustable resistance R4;
The input that the first end of described resistance R 1 is described dim signal generation module, the second end of described resistance R 1 and the first end of described resistance R 2 are connected to the input of described three terminal regulator altogether, the second end ground connection of described resistance R 2, the earth terminal ground connection of described three terminal regulator, described resistance R 3 is connected between the first end of the output of described three terminal regulator and described adjustable resistance R4, the output that the first end of described adjustable resistance R4 is described dim signal generation module, the second end ground connection of described adjustable resistance R4.
7. LED light fixture as claimed in claim 5, is characterized in that, described drive control module comprises:
Resistance R 5, resistance R 6, resistance R 7, capacitor C 3, capacitor C 4, driver, resistance R 8, resistance R 9, resistance R 10, capacitor C 5, capacitor C 6, resistance R 11 and resistance R 12;
The under-voltage test side that the power supply input pin of described driver is described drive control module, the power supply input pin of the described driver of the first termination of described resistance R 5, the second end of described resistance R 5 and the first end of described resistance R 6 are connected to the under-voltage detection pin of described driver altogether, the second end ground connection of described resistance R 6, the oscillator signal end that the first end of described resistance R 7 is described drive control module, the second end of described resistance R 7 and the first end of described capacitor C 3 are connected to the vibration pin of described driver altogether, the second end ground connection of described capacitor C 3, described capacitor C 4 is connected between the compensation pin and simulation lower margin of described driver, and the simulation lower margin ground connection of described driver, the dim signal input that the simulation light modulation pin of described driver is described drive control module, and the empty pin sky of described driver connects, the driving pin of described driver and main switch current detecting pin are respectively switch control end and the current detecting end of described drive control module, described resistance R 8 is connected between the main switch current detecting pin and ground of described driver, the first end of the first end of described resistance R 9 and described resistance R 10 connects respectively the LED electric current of described driver and responds to positive pin and the negative pin of LED electric current induction, the second end of described resistance R 9 and the second end of described resistance R 10 are respectively electric current induction anode and the electric current induction negative terminal of described drive control module, described capacitor C 5 is connected between the internal voltage regulator output pin and power lower margin of described driver, and described power lower margin ground connection, the overvoltage protection pin of described driver, the first end of the first end of described capacitor C 6 and described resistance R 11 is connected to the first end of described resistance R 12 altogether, the equal ground connection of the second end of the second end of described capacitor C 6 and described resistance R 11, the overvoltage test side that the second end of described resistance R 12 is described drive control module.
8. LED light fixture as claimed in claim 5, is characterized in that, described switching tube is N-channel MOS pipe or NPN type triode.
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| CN2012101752529A CN103458557A (en) | 2012-05-31 | 2012-05-31 | LED drive control circuit and LED lamp |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023455A (en) * | 2014-06-27 | 2014-09-03 | 电子科技大学 | LED (light emitting diode) constant-current drive circuit based on BJT (bipolar junction transistor) switch tube |
| CN104219835A (en) * | 2014-08-25 | 2014-12-17 | 浙江生辉照明有限公司 | Driving device and method of LED lighting device |
| CN105050275A (en) * | 2015-08-03 | 2015-11-11 | 深圳市明微电子股份有限公司 | Led constant current drive circuit and control method thereof |
| CN107135579A (en) * | 2017-06-30 | 2017-09-05 | 台州市椒光照明有限公司 | A kind of Width funtion LED lamp drive circuit of tunable optical |
| CN107333367A (en) * | 2017-07-05 | 2017-11-07 | 深圳市晟碟半导体有限公司 | A parameter adjustment system and method for an induction lamp |
| CN107548188A (en) * | 2016-06-24 | 2018-01-05 | 深圳市富满电子集团股份有限公司 | A kind of LED, LED colour temperature adjustment control chips and circuit |
| CN107592702A (en) * | 2017-09-18 | 2018-01-16 | 佛山市国星光电股份有限公司 | A kind of power conditioning circuitry and LED drive device |
| CN108040399A (en) * | 2018-01-03 | 2018-05-15 | 欧普照明股份有限公司 | A kind of overvoltage crowbar and constant current driver circuit for LED |
| CN108521692A (en) * | 2018-03-21 | 2018-09-11 | 深圳市富满电子集团股份有限公司 | The temprature control method and LED illumination System of LED illumination System |
| CN111225473A (en) * | 2020-03-13 | 2020-06-02 | 东莞市灿光电子科技有限公司 | A ballast-based dimming switch circuit and dimming method |
| CN112351541A (en) * | 2019-08-06 | 2021-02-09 | 漳州立达信光电子科技有限公司 | Photoinduction drive circuit and lamp |
| CN113079609A (en) * | 2021-06-04 | 2021-07-06 | 上海芯龙半导体技术股份有限公司 | Constant current control chip, system and LED constant current drive circuit |
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Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219021Y (en) * | 1994-12-29 | 1996-02-07 | 东南大学 | Multi-channel Electromagnetic Pest Eliminator |
| CN2349552Y (en) * | 1998-11-20 | 1999-11-17 | 中国科学院广州电子技术研究所 | Inter-connected intelligent gas meter |
| CN2352924Y (en) * | 1997-12-29 | 1999-12-08 | 中国科学院广州电子技术研究所 | Internet and intelligent type water meter |
| CN2360855Y (en) * | 1998-11-20 | 2000-01-26 | 中国科学院广州电子技术研究所 | Internet intelligent watt-hour meter |
| CN2418617Y (en) * | 2000-03-10 | 2001-02-07 | 水利部交通部电力工业部南京水利科学研究院 | Load-regulation controller for micro-generator |
| CN2612202Y (en) * | 2002-04-16 | 2004-04-14 | 肖启明 | Red infrared controller of bedside lamp |
| CN200949881Y (en) * | 2005-11-25 | 2007-09-19 | 董国仓 | Multifunctional multi-user energy-storage central cold and warm apparatus |
| CN200983630Y (en) * | 2006-12-13 | 2007-11-28 | 康佳集团股份有限公司 | A TV set stabilizing output circuit |
| CN201252394Y (en) * | 2008-09-05 | 2009-06-03 | 刘杰 | Temperature protective circuit |
| EP2076095A2 (en) * | 2007-12-31 | 2009-07-01 | Lumination LLC | Tricolor LED traffic signal |
| CN201536980U (en) * | 2009-11-06 | 2010-08-04 | 邓慕斯 | Electric chafing dish |
| CN201562147U (en) * | 2009-11-20 | 2010-08-25 | 邓慕斯 | Intelligent control circuit for electric cooker |
| CN102226773A (en) * | 2011-03-30 | 2011-10-26 | 马军 | Test bench for X-ray detection apparatuses |
| CN202034908U (en) * | 2011-04-13 | 2011-11-09 | 深圳茂硕电子科技有限公司 | Power supply adopting frequency inversion technology |
-
2012
- 2012-05-31 CN CN2012101752529A patent/CN103458557A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2219021Y (en) * | 1994-12-29 | 1996-02-07 | 东南大学 | Multi-channel Electromagnetic Pest Eliminator |
| CN2352924Y (en) * | 1997-12-29 | 1999-12-08 | 中国科学院广州电子技术研究所 | Internet and intelligent type water meter |
| CN2349552Y (en) * | 1998-11-20 | 1999-11-17 | 中国科学院广州电子技术研究所 | Inter-connected intelligent gas meter |
| CN2360855Y (en) * | 1998-11-20 | 2000-01-26 | 中国科学院广州电子技术研究所 | Internet intelligent watt-hour meter |
| CN2418617Y (en) * | 2000-03-10 | 2001-02-07 | 水利部交通部电力工业部南京水利科学研究院 | Load-regulation controller for micro-generator |
| CN2612202Y (en) * | 2002-04-16 | 2004-04-14 | 肖启明 | Red infrared controller of bedside lamp |
| CN200949881Y (en) * | 2005-11-25 | 2007-09-19 | 董国仓 | Multifunctional multi-user energy-storage central cold and warm apparatus |
| CN200983630Y (en) * | 2006-12-13 | 2007-11-28 | 康佳集团股份有限公司 | A TV set stabilizing output circuit |
| EP2076095A2 (en) * | 2007-12-31 | 2009-07-01 | Lumination LLC | Tricolor LED traffic signal |
| CN201252394Y (en) * | 2008-09-05 | 2009-06-03 | 刘杰 | Temperature protective circuit |
| CN201536980U (en) * | 2009-11-06 | 2010-08-04 | 邓慕斯 | Electric chafing dish |
| CN201562147U (en) * | 2009-11-20 | 2010-08-25 | 邓慕斯 | Intelligent control circuit for electric cooker |
| CN102226773A (en) * | 2011-03-30 | 2011-10-26 | 马军 | Test bench for X-ray detection apparatuses |
| CN202034908U (en) * | 2011-04-13 | 2011-11-09 | 深圳茂硕电子科技有限公司 | Power supply adopting frequency inversion technology |
Non-Patent Citations (1)
| Title |
|---|
| NATIOANAL SEMICONDUCTOR CORPORATION: "CONSTANT CURRENT N-CHANNEL CONTROLLER WITH THERMAL FOLDBACK FOR DRIVING LEDS", 《NATIOANAL SEMICONDUCTOR LM3424 DATASHEET》, 22 August 2009 (2009-08-22) * |
Cited By (25)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104023455B (en) * | 2014-06-27 | 2016-04-27 | 电子科技大学 | A kind of constant current driver circuit for LED based on BJT switching tube |
| CN104023455A (en) * | 2014-06-27 | 2014-09-03 | 电子科技大学 | LED (light emitting diode) constant-current drive circuit based on BJT (bipolar junction transistor) switch tube |
| CN104219835A (en) * | 2014-08-25 | 2014-12-17 | 浙江生辉照明有限公司 | Driving device and method of LED lighting device |
| CN104219835B (en) * | 2014-08-25 | 2017-05-03 | 浙江生辉照明有限公司 | Driving device and method of LED lighting device |
| CN105050275A (en) * | 2015-08-03 | 2015-11-11 | 深圳市明微电子股份有限公司 | Led constant current drive circuit and control method thereof |
| CN105050275B (en) * | 2015-08-03 | 2018-03-06 | 深圳市明微电子股份有限公司 | Constant current driver circuit for LED and its control method |
| CN107548188A (en) * | 2016-06-24 | 2018-01-05 | 深圳市富满电子集团股份有限公司 | A kind of LED, LED colour temperature adjustment control chips and circuit |
| CN107548188B (en) * | 2016-06-24 | 2024-05-24 | 富满微电子集团股份有限公司 | LED lamp, LED color temperature adjusting control chip and circuit |
| CN107135579B (en) * | 2017-06-30 | 2019-02-15 | 台州市椒光照明有限公司 | A kind of Width funtion LED lamp drive circuit of tunable optical |
| CN107135579A (en) * | 2017-06-30 | 2017-09-05 | 台州市椒光照明有限公司 | A kind of Width funtion LED lamp drive circuit of tunable optical |
| CN107333367A (en) * | 2017-07-05 | 2017-11-07 | 深圳市晟碟半导体有限公司 | A parameter adjustment system and method for an induction lamp |
| CN107333367B (en) * | 2017-07-05 | 2023-09-26 | 深圳市晟碟半导体有限公司 | A parameter adjustment system and method for induction lamps |
| CN107592702A (en) * | 2017-09-18 | 2018-01-16 | 佛山市国星光电股份有限公司 | A kind of power conditioning circuitry and LED drive device |
| CN107592702B (en) * | 2017-09-18 | 2024-04-09 | 佛山市国星光电股份有限公司 | Power regulating circuit and LED lamp driving device |
| CN108040399A (en) * | 2018-01-03 | 2018-05-15 | 欧普照明股份有限公司 | A kind of overvoltage crowbar and constant current driver circuit for LED |
| CN108040399B (en) * | 2018-01-03 | 2024-03-05 | 欧普照明股份有限公司 | Overvoltage protection circuit and LED constant current drive circuit |
| CN108521692A (en) * | 2018-03-21 | 2018-09-11 | 深圳市富满电子集团股份有限公司 | The temprature control method and LED illumination System of LED illumination System |
| CN112351541A (en) * | 2019-08-06 | 2021-02-09 | 漳州立达信光电子科技有限公司 | Photoinduction drive circuit and lamp |
| CN111225473A (en) * | 2020-03-13 | 2020-06-02 | 东莞市灿光电子科技有限公司 | A ballast-based dimming switch circuit and dimming method |
| CN113079609B (en) * | 2021-06-04 | 2021-08-27 | 上海芯龙半导体技术股份有限公司 | Constant current control chip, system and LED constant current drive circuit |
| CN113079609A (en) * | 2021-06-04 | 2021-07-06 | 上海芯龙半导体技术股份有限公司 | Constant current control chip, system and LED constant current drive circuit |
| CN114501699A (en) * | 2022-02-21 | 2022-05-13 | 青岛易来智能科技股份有限公司 | Dimming circuit, dimmer and LED lighting device |
| CN114501699B (en) * | 2022-02-21 | 2024-01-19 | 青岛易来智能科技股份有限公司 | Dimming circuit, dimmer and LED lighting equipment |
| CN118139237A (en) * | 2024-05-07 | 2024-06-04 | 深圳市迪美照明有限公司 | LED lamp illumination control circuit |
| CN118139237B (en) * | 2024-05-07 | 2024-09-03 | 深圳市迪美照明有限公司 | LED lamp illumination control circuit |
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