CN102480815A - LED (light emitting diode) dimming drive circuit - Google Patents
LED (light emitting diode) dimming drive circuit Download PDFInfo
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- CN102480815A CN102480815A CN201010554920XA CN201010554920A CN102480815A CN 102480815 A CN102480815 A CN 102480815A CN 201010554920X A CN201010554920X A CN 201010554920XA CN 201010554920 A CN201010554920 A CN 201010554920A CN 102480815 A CN102480815 A CN 102480815A
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Abstract
The invention relates to an LED (light emitting diode) dimming drive circuit, comprising a working power supply, a voltage stabilizing circuit, a constant current circuit, a control circuit and an LED lamp bank. A constant current integration chip is respectively connected with a current sampling resistor R11, a resistor R12 and a resistor R13 and then is connected to the anode of the LED lamp bank through a relay K1, a relay K2 and a relay K3 respectively. The cathode of the LED lamp bank is connected with a GND (Ground). In the invention, the constant current integration chip is adopted to drive to perform dimming and ensure the LED to work stable and reliably.
Description
[technical field]
The present invention relates to a kind of led drive circuit, relate in particular to a kind of LED light modulation drive circuit.
[background technology]
Along with the continuous development of science and technology, the new product new technology is constantly reformed, and LED is as new type light source; It has energy-saving and environmental protection, characteristics of high efficiency; Technology is ripe and be applied to every field, and LED is widely used as lighting source, various led drive circuits also occurred thereupon.Development along with microelectric technique; The incorporate integrated high-frequency model design LED of a lot of employings drives in the place of direct current 24V at present; It has advantages such as power consumption is little, efficient is high, the unit power volume is little, in light weight, driving current constant; Planned as a whole the advantage of Switching Power Supply, overcome the interference problem of Switching Power Supply, circuit is simple and reliable.But all be firm power output, can not regulate that intensity of illumination can not be regulated, and has brought serious inconvenience to the user to power output.
Therefore, prior art needs to improve.
[summary of the invention]
In view of this, be necessary to propose a kind of efficient, reliable, cheap, simple, light LED light modulation drive circuit, driving LED work that can be safe and reliable.
A technical scheme of the present invention is, a kind of LED light modulation drive circuit, and it comprises working power, voltage stabilizing circuit, constant-current circuit, control circuit and LED lamp group; Constant-current circuit comprises three-terminal voltage regulator U2, current sampling resistor R11, current sampling resistor R12, current sampling resistor R13, and relay K 1, relay K 2, relay K 3 are used to LED lamp group constant operating current are provided; 1 pin of three-terminal voltage regulator U2 is an output pin; Be connected respectively to current sampling resistor R11, current sampling resistor R12, current sampling resistor R13; The other end of current sampling resistor R11, current sampling resistor R12, current sampling resistor R13 is connected to LED lamp group anode through relay K 1, relay K 2, relay K 3 respectively; 2 pin are the sampling feedback pin, are connected with output pin 1 pin through current sampling resistor R11, and are connected with current sampling resistor R12, current sampling resistor R13 through relay K 2, relay K 3 respectively; 3 pin are the power supply input pin, directly are connected with the working power positive pole; Coil windings one end of relay K 1, relay K 2, relay K 3 connects one to one with the negative electrode of diode D2, diode D3, diode D4 respectively; And be connected with the working power positive pole respectively, the other end is connected with the anode of diode D2, diode D3, diode D4 respectively; Voltage stabilizing circuit comprises Voltage stabilizing module U1, current-limiting resistance R2, voltage stabilizing didoe D1; 1 pin of Voltage stabilizing module U1 is the power supply input pin, is connected with the working power positive pole through current-limiting resistance R2, and meets working power GND through voltage stabilizing didoe D1; 2 pin are the GND pin, directly are connected with working power GND; 3 pin are+the 5V output pin; Control circuit comprises counting/frequency divider U3, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7; Current-limiting resistance R8, current-limiting resistance R9, current-limiting resistance R10; Capacitor C 4, capacitor C 5; Triode Q1, triode Q2, triode Q3, and touch-switch S1 are used to realize LED lamp group dimming function; 1,2,3,4,5,6,7,9,10,11 pin of counting/frequency divider U3 are output pin; Wherein 1,2,5,6,9,11 pin are unsettled; 3 pin are connected with the base stage of triode Q3 through current-limiting resistance R8; 4 pin are connected with the base stage of triode Q2 through current-limiting resistance R9, and 7 pin are connected with the base stage of triode Q1 through current-limiting resistance R10, and the emitter of triode Q1, triode Q2, triode Q3 all is connected with GND; 10 pin are connected through 3 pin of resistance R 6 and Voltage stabilizing module U1, and are connected with its 15 pin through resistance R 7; 8 pin are the GND pin, directly are connected with working power GND; 12 pin are the carry output pin, and are unsettled; 13 pin are clock constraint input pin, are connected with GND through resistance R 5; 14 pin are the clock input pin, and as dimming control signal input sample pin, high level is effective, and 3 pin through resistance R 3, touch-switch S1 and Voltage stabilizing module U1 are connected, and also through resistance R after the parallel connection 4 and capacitor C 4, are connected with GND; 15 pin are the input pin that resets, and are connected with GND through capacitor C 5; 16 pin are the power supply input pin, directly are connected with 3 pin of Voltage stabilizing module U1; The collector electrode of triode Q1, triode Q2, triode Q3 also connects one to one with the anode of diode D2, diode D3, diode D4 respectively; LED lamp group negative electrode is connected with GND.
Be applied to such scheme; Described LED light modulation drive circuit comprises that also storage capacitor C1 and surge suppress resistance R 1; The positive pole of storage capacitor C1 is connected with working power is anodal, and surge suppresses resistance R 1 one ends and is connected with the negative pole of storage capacitor C1, and the other end is connected with working power GND.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, voltage stabilizing circuit also comprises smooth capacitor C 2 and high frequency capacitance C3, and after both parallel connections, an end is connected with 2 pin of Voltage stabilizing module U1, and the other end is connected with 3 pin of Voltage stabilizing module U1.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, the emitter of triode Q1, triode Q2, triode Q3, and LED lamp group negative electrode connects altogether.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, Voltage stabilizing module U1 is LM7805, and three-terminal voltage regulator U2 is LM317, and counting/frequency divider U3 is CD4017.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, voltage stabilizing didoe D1 is 15V/0.5W, and diode D2, diode D3, diode D4 are SS14; Triode Q1, triode Q2, triode Q3 are C945; Relay K 1, relay K 2, relay K 3 are 24V/1A.
Be applied to above-mentioned each relevant programme, in the described LED light modulation drive circuit, storage capacitor C1 is 470 μ F/50V, and smooth capacitor C 2 is 22 μ F/16V, and capacitor C 3, capacitor C 4, capacitor C 5 are 103 electric capacity.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, resistance R 1, resistance R 2, resistance R 8, resistance R 9, resistance R 10 resistances are identical, are 1k Ω; Resistance R 3 resistances are 100k Ω; Resistance R 4 resistances are 1.5M Ω; Resistance R 5, resistance R 6 resistances are identical, are 10k Ω; Resistance R 7 resistances are 200k Ω; Resistance R 11 resistances are 4.3 Ω; Resistance R 12 resistances are 39 Ω; Resistance R 13 resistances are 30 Ω.
Be applied to above-mentioned scenarios, in the described LED light modulation drive circuit, said working power is a dc supply, and for example, said dc supply is 24V.
Such scheme; Through adopting adjustable mode to realize LED illumination, can control opening of light fixture through the control button and close and carry out brightness regulation, satisfied people biglyyer and the light power is essential has really asked; Also avoided unnecessary energy resource consumption; Economic environmental protection has greatly strengthened user's result of use, has very high market value.
[description of drawings]
Fig. 1 is the sketch map of an embodiment.
[embodiment]
Below in conjunction with accompanying drawing, specific embodiments of the invention is described in detail.
As shown in Figure 1, one embodiment of the present of invention are, a kind of LED light modulation drive circuit, and it comprises working power, voltage stabilizing circuit, constant-current circuit, control circuit and LED lamp group.
Wherein, constant-current circuit comprises three-terminal voltage regulator U2, current sampling resistor R11, R12, R13, and relay K 1, K2, K3 are used to LED lamp group constant operating current are provided.
1 pin of three-terminal voltage regulator U2 is an output pin, connects the end of current sampling resistor R11, R12, R13 respectively, and the other end of current sampling resistor R11, R12, R13 is connected to LED lamp group anode through relay K 1, K2, K3 respectively; 2 pin of three-terminal voltage regulator U2 are the sampling feedback pin, are connected with output pin 1 pin through current sampling resistor R11, and are as shown in Figure 1, and are connected with resistance R 12, R13 through relay K 2, K3 respectively; 3 pin of three-terminal voltage regulator U2 are the power supply input pin, directly are connected with the working power positive pole.
As shown in Figure 1; Coil windings one end of relay K 1, K2, K3 connects one to one with the negative electrode of diode D2, D3, D4 respectively; And be connected with the working power positive pole respectively, the coil windings other end of relay K 1, K2, K3 is connected with the anode of diode D2, D3, D4 respectively.
Voltage stabilizing circuit comprises Voltage stabilizing module U1, current-limiting resistance R2, voltage stabilizing didoe D1.
1 pin of Voltage stabilizing module U1 is the power supply input pin, is connected with the working power positive pole through current-limiting resistance R2, and meets working power GND through voltage stabilizing didoe D1; 2 pin of Voltage stabilizing module U1 are the GND pin, directly are connected with working power GND; 3 pin of Voltage stabilizing module U1 are+the 5V output pin to be used for stable voltage to control circuit being provided.
Control circuit comprises counting/frequency divider U3, resistance R 3, R4, R5, R6, R7, current-limiting resistance R8, R9, R10, and capacitor C 4, C5, triode Q1, Q2, Q3, and touch-switch S1 are used to realize LED lamp group dimming function.
1,2,3,4,5,6,7,9,10,11 pin of counting/frequency divider U3 are output pin,
Wherein 1,2,5,6,9,11 pin are unsettled;
3 pin of counting/frequency divider U3 are connected with the base stage of triode Q3 through current-limiting resistance R8;
4 pin of counting/frequency divider U3 are connected with the base stage of triode Q2 through current-limiting resistance R9;
7 pin of counting/frequency divider U3 are connected with the base stage of triode Q1 through current-limiting resistance R10, and the emitter of triode Q1, Q2, Q3 all is connected with GND; For example, the emitter of triode Q1, Q2, Q3 is connected with GND respectively;
10 pin of counting/frequency divider U3 are connected through 3 pin of resistance R 6 and Voltage stabilizing module U1, and are connected with its 15 pin through resistance R 7;
8 pin of counting/frequency divider U3 are the GND pin, directly are connected with working power GND;
12 pin of counting/frequency divider U3 are the carry output pin, and are unsettled;
13 pin of counting/frequency divider U3 are clock constraint input pin, are connected with GND through resistance R 5;
14 pin of counting/frequency divider U3 are the clock input pin, and as dimming control signal input sample pin, high level is effective, and 3 pin through resistance R 3, touch-switch S1 and Voltage stabilizing module U1 are connected, and also through resistance R after the parallel connection 4 and capacitor C 4, are connected with GND;
15 pin of counting/frequency divider U3 are the input pin that resets, and are connected with GND through capacitor C 5;
16 pin of counting/frequency divider U3 are the power supply input pin, directly are connected with 3 pin of Voltage stabilizing module U1.
The collector electrode of triode Q1, Q2, Q3 also connects one to one with the anode of diode D2, D3, D4 respectively.As shown in Figure 1, promptly the collector electrode of triode Q1 is connected with the anode of diode D2, and the collector electrode of triode Q2 is connected with the anode of diode D3, and the collector electrode of triode Q3 is connected with the anode of diode D4.
LED lamp group negative electrode is connected with GND.
Be applied to example; Preferably, described LED light modulation drive circuit comprises that also storage capacitor C1 and surge suppress resistance R 1, and the positive pole of storage capacitor C1 is connected with working power is anodal; Surge suppresses resistance R 1 one ends and is connected with the negative pole of storage capacitor C1, and the other end is connected with working power GND.
Be applied to above-mentioned each example, preferred, in the described LED light modulation drive circuit, voltage stabilizing circuit also comprises smooth capacitor C 2 and high frequency capacitance C3, and after both parallel connections, an end is connected with 2 pin of Voltage stabilizing module U1, and the other end is connected with 3 pin of Voltage stabilizing module U1.
Be applied to above-mentioned each example, preferred, as shown in Figure 1, in the described LED light modulation drive circuit, the emitter of triode Q1, Q2, Q3, and LED lamp group negative electrode connects altogether.And for example, the equal common-battery in the position of all earth connections seedbed line connects.
Be applied to above-mentioned each example, preferred, in the described LED light modulation drive circuit, Voltage stabilizing module U1 is LM7805, and three-terminal voltage regulator U2 is LM317, and counting/frequency divider U3 is CD4017; Voltage stabilizing didoe D1 is 15V/0.5W, and diode D2, D3, D4 are SS14; Triode Q1, Q2, Q3 are C945; Relay K 1, K2, K3 are 24V/1A; Storage capacitor C1 is 470 μ F/50V, and smooth capacitor C 2 is 22 μ F/16V, and capacitor C 3, C4, C5 are 103 electric capacity, i.e. 0.01 μ F; Resistance R 1, R2, R8, R9, R10 resistance are identical, are 1k Ω; Resistance R 3 resistances are 100k Ω; Resistance R 4 resistances are 1.5M Ω; Resistance R 5, R6 resistance are identical, are 10k Ω; Resistance R 7 resistances are 200k Ω; Resistance R 11 resistances are 4.3 Ω; Resistance R 12 resistances are 39 Ω; Resistance R 13 resistances are 30 Ω.
Be applied to above-mentioned each example, preferred, in the described LED light modulation drive circuit, said working power is a dc supply, and for example, said dc supply is 24V.
Provide a concrete example below again, a kind of LED light modulation drive circuit, as shown in Figure 1, said control circuit is to adopt DC24V as working power, LED all is operated in constant current state.In order to guarantee that supply voltage does not receive ectocine and frequent fluctuation, put storage capacitor C1 so be sidelong at dc power anode; In order to suppress the surge current of powered on moment, the series connection surge suppresses resistance R 1 between the negative pole of storage capacitor C1 is to GND; Since 24V voltage head and shoulders above the operating voltage of counting/frequency divider U3, provide+5V voltage for it so increased Voltage stabilizing module U1; Power supply passes through three-terminal voltage regulator U2, sampling resistor R11, R12 or R13, relay K 1, K2 or K3, thereby for LED lamp group constant operating current is provided; Through counting/frequency divider U3, control triode Q1, Q2, single, perhaps three the combination conductings of combination in twos of Q3, thus the combination of realization current-limiting resistance R8, R9, R10 resistance realizes LED lamp group dimming function.
That is to say, in order to guarantee steadily fluctuation and suppress the surge current of powered on moment of input supply voltage, in the side of the positive electrode of power supply and negative side connected electrochemical capacitor C1 and resistance R 1.
1 pin of Voltage stabilizing module U1 is the power supply input pin, and the positive pole through current-limiting resistance R2 and power supply is connected, and too highly can not damage Voltage stabilizing module U1 in order to prevent supply voltage moment, so at its 1 pin GND is met voltage stabilizing didoe D1; 2 pin are the GND pin, directly are connected with power supply GND; 3 pin are+the 5V output pin, are coupled to the high frequency clutter in the power supply signal in order to guarantee output voltage stabilization and filtering, increase smooth capacitor C 2 and high frequency capacitance C3 at side of the positive electrode and the GND of+5V.
1,2,3,4,5,6,7,9,10,11 pin of counting/frequency divider U3 are output pin; Wherein not definition of 1,2,5,6,9,11 pin; So unsettled need not, 3 pin are connected with the base stage of triode Q3 through current-limiting resistance R8,4 pin are connected with the base stage of triode Q2 through current-limiting resistance R9; 7 pin are connected with the base stage of triode Q1 through current-limiting resistance R10; The emitter of triode Q1, Q2, Q3 all is connected with GND, and 10 pin are connected through 3 pin of resistance R 6 and Voltage stabilizing module U1, and is connected with its 15 pin through resistance R 7; 8 pin are the GND pin, directly are connected with power supply GND; 12 pin are the carry output pin, not definition, so unsettled need not; 13 pin are clock constraint input pin, are connected with GND through resistance R 5; 14 pin are the clock input pin, and as dimming control signal input sample pin, high level is effective, and 3 pin through resistance R 3, touch-switch S1 and Voltage stabilizing module U1 are connected, and are connected with GND through resistance R 4, capacitor C 4; 15 pin are the input pin that resets, and are connected with GND through filter capacitor C5; 16 pin are the power supply input pin, directly are connected with 3 pin of Voltage stabilizing module U1.
1 pin of three-terminal voltage regulator U2 is an output pin, is connected with LED lamp group anode through current sampling resistor R11, R12 or R13, relay K 1, K2 or K3, and LED lamp group negative electrode is connected with GND; 2 pin are the sampling feedback pin, directly are connected with current sampling resistor R11, and are connected with resistance R 12, R13 through relay K 2, K3 respectively; 3 pin are the power supply input pin, directly are connected with positive source; Coil windings one end of relay K 1, K2 or K3 and negative electrode, the positive source of diode D2, D3 or D4 are connected, and the collector electrode of anode, triode Q1, Q2 or the Q3 of the other end and diode D2, D3 or D4 is connected.
Continue a certain concrete working condition of explanation the foregoing description below again.As shown in Figure 1, after the energized, Voltage stabilizing module U1, counting/frequency divider U3, three-terminal voltage regulator U2 get the electrician and do; The 3 pin output high level of counting/frequency divider U3,2,4,7 pin are low level, through the control of current-limiting resistance R8, R9, R10, triode Q1, Q2, Q3; Relay K 1, relay K 2 normally opened contacts break off; Relay K 3 normally-closed contacts break off, and whole LED lamp group loop is open circuit, and LED lamp group is for extinguishing state;
Push for the first time touch-switch S1, the 2 pin output high level of counting/frequency divider U3, the output of 3,4,7 pin is low level; Through current-limiting resistance R8, R9, R10; The control of triode Q1, Q2, Q3, relay K 1, relay K 2 normally opened contacts break off, and relay K 3 normally-closed contacts are closed; For LED lamp group forms the closed-loop path, LED works with the first frequency modulated light pattern;
Push for the second time touch-switch S1, the 4 pin output high level of counting/frequency divider U3, the output of 3,2,7 pin is low level; Through current-limiting resistance R8, R9, R10, the control of triode Q1, Q2, Q3, the normally opened contact of relay K 1 breaks off; Relay K 2 normally opened contacts are closed; Relay K 3 normally-closed contacts are closed, and for LED lamp group forms the closed-loop path, LED works with the second frequency modulated light pattern;
Push touch-switch S1 for the third time, the 7 pin output high level of counting/frequency divider U3, the output of 3,2,4 pin is low level; Through current-limiting resistance R8, R9, R10, the control of triode Q1, Q2, Q3, the normally opened contact of relay K 1 is closed; Relay K 2 normally opened contacts break off; Relay K 3 normally-closed contacts are closed, and for LED lamp group forms the closed-loop path, LED works with the third gear optical mode;
Push touch-switch S1 the 4th time, the 3 pin output high level of counting/frequency divider U3,2,4,7 pin are low level; Through current-limiting resistance R8, R9, R10; The control of triode Q1, Q2, Q3, relay K 1, relay K 2 normally opened contacts break off, and relay K 3 normally-closed contacts break off; Whole LED lamp group loop is open circuit, and LED lamp group is for extinguishing state.
Like this, every kind of operating state of LED lamp group is constant current work, thereby has guaranteed the safe and reliable work of LED.Smooth capacitor C 2, high frequency capacitance C3 and high frequency capacitance C4 arrive constant current integrated chip U1, and the led light source group gets electric promptly the beginning with constant current work, like this, adopt constant current integrated chip to drive, and can carry out light modulation and guarantee the reliable and stable work of LED; That is circuit is simple and convenient, and is reliable and stable.
The above embodiment has only expressed several kinds of execution modes of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to claim of the present invention; And, each technical characterictic of listing above, it makes up each embodiment that can form each other, should be regarded as the scope that belongs to specification record of the present invention.For the person of ordinary skill of the art, under the prerequisite that does not break away from the present invention's design, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with accompanying claims.
Claims (10)
1. a LED light modulation drive circuit is characterized in that, comprises working power, voltage stabilizing circuit, constant-current circuit, control circuit and LED lamp group;
Constant-current circuit comprises three-terminal voltage regulator U2, current sampling resistor R11, current sampling resistor R12, current sampling resistor R13, and relay K 1, relay K 2, relay K 3 are used to LED lamp group constant operating current are provided; 1 pin of three-terminal voltage regulator U2 is an output pin; Be connected respectively to current sampling resistor R11, current sampling resistor R12, current sampling resistor R13; The other end of current sampling resistor R11, current sampling resistor R12, current sampling resistor R13 is connected to LED lamp group anode through relay K 1, relay K 2, relay K 3 respectively; 2 pin are the sampling feedback pin, are connected with output pin 1 pin through current sampling resistor R11, and are connected with current sampling resistor R12, current sampling resistor R13 through relay K 2, relay K 3 respectively; 3 pin are the power supply input pin, directly are connected with the working power positive pole; Coil windings one end of relay K 1, relay K 2, relay K 3 connects one to one with the negative electrode of diode D2, diode D3, diode D4 respectively; And be connected with the working power positive pole respectively, the other end is connected with the anode of diode D2, diode D3, diode D4 respectively;
Voltage stabilizing circuit comprises Voltage stabilizing module U1, current-limiting resistance R2, voltage stabilizing didoe D1; 1 pin of Voltage stabilizing module U1 is the power supply input pin, is connected with the working power positive pole through current-limiting resistance R2, and meets working power GND through voltage stabilizing didoe D1; 2 pin are the GND pin, directly are connected with working power GND; 3 pin are+the 5V output pin;
Control circuit comprises counting/frequency divider U3, resistance R 3, resistance R 4, resistance R 5, resistance R 6, resistance R 7; Current-limiting resistance R8, current-limiting resistance R9, current-limiting resistance R10; Capacitor C 4, capacitor C 5; Triode Q1, triode Q2, triode Q3, and touch-switch S1 are used to realize LED lamp group dimming function; 1,2,3,4,5,6,7,9,10,11 pin of counting/frequency divider U3 are output pin; Wherein 1,2,5,6,9,11 pin are unsettled; 3 pin are connected with the base stage of triode Q3 through current-limiting resistance R8; 4 pin are connected with the base stage of triode Q2 through current-limiting resistance R9, and 7 pin are connected with the base stage of triode Q1 through current-limiting resistance R10, and the emitter of triode Q1, triode Q2, triode Q3 all is connected with GND; 10 pin are connected through 3 pin of resistance R 6 and Voltage stabilizing module U1, and are connected with its 15 pin through resistance R 7; 8 pin are the GND pin, directly are connected with working power GND; 12 pin are the carry output pin, and are unsettled; 13 pin are clock constraint input pin, are connected with GND through resistance R 5; 14 pin are the clock input pin, and as dimming control signal input sample pin, high level is effective, and 3 pin through resistance R 3, touch-switch S1 and Voltage stabilizing module U1 are connected, and also through resistance R after the parallel connection 4 and capacitor C 4, are connected with GND; 15 pin are the input pin that resets, and are connected with GND through capacitor C 5; 16 pin are the power supply input pin, directly are connected with 3 pin of Voltage stabilizing module U1; The collector electrode of triode Q1, triode Q2, triode Q3 also connects one to one with the anode of diode D2, diode D3, diode D4 respectively;
LED lamp group negative electrode is connected with GND.
2. LED light modulation drive circuit according to claim 1; It is characterized in that; Comprise that also storage capacitor C1 and surge suppress resistance R 1; The positive pole of storage capacitor C1 is connected with working power is anodal, and surge suppresses resistance R 1 one ends and is connected with the negative pole of storage capacitor C1, and the other end is connected with working power GND.
3. LED light modulation drive circuit according to claim 2 is characterized in that, said voltage stabilizing circuit also comprises smooth capacitor C 2 and high frequency capacitance C3, and after both parallel connections, an end is connected with 2 pin of Voltage stabilizing module U1, and the other end is connected with 3 pin of Voltage stabilizing module U1.
4. LED light modulation drive circuit according to claim 3 is characterized in that, the emitter of triode Q1, triode Q2, triode Q3, and LED lamp group negative electrode connects altogether.
5. LED light modulation drive circuit according to claim 4 is characterized in that Voltage stabilizing module U1 is LM7805, and three-terminal voltage regulator U2 is LM317, and counting/frequency divider U3 is CD4017.
6. LED light modulation drive circuit according to claim 5 is characterized in that voltage stabilizing didoe D1 is 15V/0.5W, and diode D2, diode D3, diode D4 are SS14; Triode Q1, triode Q2, triode Q3 are C945; Relay K 1, relay K 2, relay K 3 are 24V/1A.
7. LED light modulation drive circuit according to claim 6 is characterized in that, storage capacitor C1 is 470 μ F/50V, and smooth capacitor C 2 is 22 μ F/16V, and capacitor C 3, capacitor C 4, capacitor C 5 are 103 electric capacity.
8. LED light modulation drive circuit according to claim 7 is characterized in that, resistance R 1, resistance R 2, resistance R 8, resistance R 9, resistance R 10 resistances are identical, are 1k Ω; Resistance R 3 resistances are 100k Ω; Resistance R 4 resistances are 1.5M Ω; Resistance R 5, resistance R 6 resistances are identical, are 10k Ω; Resistance R 7 resistances are 200k Ω; Resistance R 11 resistances are 4.3 Ω; Resistance R 12 resistances are 39 Ω; Resistance R 13 resistances are 30 Ω.
9. according to the arbitrary described LED light modulation drive circuit of claim 1 to 8, it is characterized in that said working power is a dc supply.
10. LED light modulation drive circuit according to claim 9 is characterized in that said dc supply is 24V.
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| CN103841714A (en) * | 2012-11-27 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | LED dimming drive circuit |
| CN104105245A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | LED driving protection circuit |
| CN104595871A (en) * | 2015-02-05 | 2015-05-06 | 客来福家居股份有限公司 | LED (light emitting diode) table lamp capable of adjusting brightness in touch way |
| CN108882464A (en) * | 2018-08-09 | 2018-11-23 | 合肥芯碁微电子装备有限公司 | A kind of driving circuit for laser direct-writing exposure machine inner layer circuit board label |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR20100054053A (en) * | 2008-11-13 | 2010-05-24 | 주식회사 비엔씨넷 | Constant current type led driver circuit for led stoplight |
| CN101742770A (en) * | 2009-12-23 | 2010-06-16 | 海洋王照明科技股份有限公司 | LED light dimming circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103841714A (en) * | 2012-11-27 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | LED dimming drive circuit |
| CN103841714B (en) * | 2012-11-27 | 2016-01-13 | 深圳市海洋王照明工程有限公司 | LED dimming driving circuit |
| CN104105245A (en) * | 2013-04-11 | 2014-10-15 | 海洋王（东莞）照明科技有限公司 | LED driving protection circuit |
| CN103698591A (en) * | 2013-12-06 | 2014-04-02 | 国家电网公司 | Electroscopic device and electroscopic method of near field region of supervoltage or ultra-high voltage transmission line |
| CN104595871A (en) * | 2015-02-05 | 2015-05-06 | 客来福家居股份有限公司 | LED (light emitting diode) table lamp capable of adjusting brightness in touch way |
| CN104595871B (en) * | 2015-02-05 | 2017-05-03 | 客来福家居股份有限公司 | LED (light emitting diode) table lamp capable of adjusting brightness in touch way |
| CN108882464A (en) * | 2018-08-09 | 2018-11-23 | 合肥芯碁微电子装备有限公司 | A kind of driving circuit for laser direct-writing exposure machine inner layer circuit board label |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102480815B (en) | 2015-07-08 |
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