CN203775490U - LED color temperature adjusting circuit and LED lighting device - Google Patents
LED color temperature adjusting circuit and LED lighting device Download PDFInfo
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- CN203775490U CN203775490U CN201420149070.9U CN201420149070U CN203775490U CN 203775490 U CN203775490 U CN 203775490U CN 201420149070 U CN201420149070 U CN 201420149070U CN 203775490 U CN203775490 U CN 203775490U
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Abstract
The utility model provides an LED color temperature adjusting circuit and an LED lighting device. The circuit is connected with an AC power supply through a power switch. The LED color temperature adjusting circuit comprises a constant-current control module; a plurality of switch tubes for controlling the connection and disconnection of the constant current; a voltage sampling module for outputting sampling voltages with corresponding voltage values according to the on and off time of the power switch; a switch control module connected with a plurality of reference voltage sources and outputting a control signal at the output end according to the comparison results of the sampling voltages and the reference voltage sources so as to drive the corresponding switch tubes to be connected and disconnected and to control the on and off of LED loads with different colors to realize color temperature adjusting. The switch control module controls the on and off of the LED lamp string with different colors according to the different sampling voltages, so that the purpose of adjusting LED color temperature can be realized only based on the on and off of the power switch; and each module is simply composed and low in cost.
Description
Technical field
The utility model belongs to lighting field, relates in particular to LED colour temperature regulating circuit and LED lighting device.
Background technology
At present, the alternative conventional incandescent of LED lighting device etc. is widely used as mains lighting supply, and the LED mains lighting supply of tunable optical application is simultaneously also more and more, and the kind of the LED mains lighting supply of tunable optical is a lot, except light regulates, also has colour temperature adjusting.
It is to adopt two-stage control mode that tradition regulates the LED constant-current driving power supply implementation of colour temperature, and the first order realizes the output of AC-DC conversion constant voltage and controls, and the second level is realized constant current output and realized the function that regulates colour temperature.As shown in Figure 1, the LED constant-current driving power supply first order of this adjustable color temperature adopts flyback constant voltage to control, and the input of gauze alternating current is converted to DC constant voltage output; The second level adopts step-down constant current to control, receive the input of prime constant DC voltage, by step-down, realizing constant current exports, can be good at controlling the output current of multi-channel parallel LED modules with different colors load, but this application mode exists system component many, circuit board space is large, the high and shortcoming that causes reliability to reduce due to complex structure of cost.
In addition, also there is a kind of scheme that adopts one-level constant current to control and regulate by selection variable connector pipe unlatching shutoff LED colour temperature.This scheme system component will significantly reduce, volume and cost can both be reduced, it is exactly because prime control circuit is that constant current is controlled that but this scheme exists a problem, output total current is constant, when Multi-path LED load is opened simultaneously, the forward conduction voltage of the LED lamp of different colours is different causes the LED lamp string stream that LED lamp string that forward conduction voltage is low is higher than forward conduction voltage high, and the inconsistent situation of this electric current can have influence on the effect that colour temperature regulates.Therefore,, while having the different pressure drop LED load of many groups, the electric current between uncontrollable each group LED load equates, the problem that brightness is consistent.
Utility model content
Based on this, be necessary, complex structure high for LED colour temperature regulative mode cost, the problem that reliability is low, low, the reliable LED colour temperature of a kind of cost regulating circuit is provided.
A kind of LED colour temperature regulating circuit, by a mains switch, be connected with AC power, described LED colour temperature regulating circuit comprises constant-current control module, and this constant-current control module is connected with described AC power, for the LED load of multichannel different colours provides Constant Electric Current, also comprise:
A plurality of switching tubes, for controlling the break-make of the described Constant Electric Current of described Multi-path LED load;
Voltage sample module, is connected with the output of described constant-current control module, constantly exports the sampled voltage of relevant voltage value according to the switching of described mains switch;
Switch control module, access a plurality of reference voltage sources, the input of described switch control module is connected with the output of described voltage sample module, according to described sampled voltage and described in each comparative result of reference voltage source in output output control signal to drive the break-make of corresponding described switching tube, to control the light on and off of LED modules with different colors load, realize colour temperature and regulate.
Further, described switch control module comprises voltage comparison unit, counter and first selector, wherein,
The described voltage comparison unit described a plurality of reference voltage sources of access and described sampled voltage, output the first comparative result and the second comparative result;
Described counter is connected with described voltage comparison unit, and access is also carried out exporting at least two count results to first selector after additional calculation according to described the first comparative result and described the second comparative result;
Described first selector is connected with described counter, and access also controls signal to corresponding described switching tube described in described count results output accordingly.
Further, described voltage comparison unit comprises the first comparator and the second comparator, wherein,
The first positive input terminal of described the first comparator accesses the first reference voltage source, the second positive input terminal and accesses that the second reference voltage source, negative input end access described sampled voltage, output is exported described the first comparative result to the input of described counter;
The positive input terminal of described the second comparator accesses described sampled voltage, negative input end access the 3rd reference voltage source, output is exported the second comparative result to the clear terminal of described counter;
Wherein, the voltage of voltage > the 3rd reference voltage source of voltage > second reference voltage source of described the first reference voltage source.
Further, also comprise flow-dividing control module, described flow-dividing control module is connected with the output of described switch control module, according to described control signal when described in driving multichannel, LED load is lighted for LED load described in this multichannel realizes flow-dividing control.
Further, described flow-dividing control module comprises and is connected to described in described switch control module and multichannel the logic control element between LED load and number than the source follower of the way of described LED load little 1, the described control signal that described logic control element receives the output of described switch control module is carried out output logic signal after logical operation, and described source follower is controlled according to described logical signal the electric current that LED load is flow through described in multichannel and equated.
Further, described flow-dividing control module comprises and door, operational amplifier, second selector, the first metal-oxide-semiconductor and adjustable resistance, wherein,
Described with door first input end is connected with the second output with the first output of described switch control module respectively with the second input, described with output be connected with the control end of described the first metal-oxide-semiconductor with the input of described second selector;
The source electrode of described the first metal-oxide-semiconductor passes through described adjustable resistance ground connection, and is connected with the source electrode of switching tube described in first;
Positive input terminal access the 4th reference voltage source of described operational amplifier, negative input end are connected with the drain electrode of described the first metal-oxide-semiconductor, output is connected with the first alternative passage of described second selector;
The second alternative passage of described second selector is connected with described first output of described switch control module, and the output of described second selector is connected with the control end of switching tube described in described first.
Further, described voltage sample module with comprise the first resistance and the second resistance, the anode downlink connection of the first end of described the first resistance and described constant-current control module, the second end is as the output of described voltage sample module and be connected with the first end of described the second resistance, and the second end of described the second resistance is connected with the negative terminal of described constant-current control module.
In addition, also provide a kind of LED lighting device, comprised above-mentioned LED colour temperature regulating circuit.
Above-mentioned LED colour temperature regulating circuit is exported the sampled voltage of different pressure values according to the unlatching of mains switch and off-state by voltage detection module, the LED lamp cross luma that switch control module is controlled different colours according to different sampled voltages goes out, realize and only rely on the unlatching of mains switch to turn-off to realize the object that regulates LED colour temperature, the composition of modules is simple, and cost is low.
Accompanying drawing explanation
Fig. 1 is the constant-current driving power supply circuit that prior art provides;
Fig. 2 is LED colour temperature regulating circuit module map;
Fig. 3 is the schematic diagram of a LED colour temperature regulating circuit in embodiment;
Fig. 4 is the schematic diagram of the LED colour temperature regulating circuit in another embodiment;
The level state of each port when Fig. 5 is the LED colour temperature regulating circuit periodic duty of Fig. 3.
Embodiment
In order to make the technical problems to be solved in the utility model, technical scheme and beneficial effect clearer, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein is only in order to explain the utility model, and be not used in restriction the utility model.
Shown in Fig. 2,3,4, a kind of LED colour temperature regulating circuit, is connected with AC power AC by a mains switch K0, and LED colour temperature regulating circuit comprises constant-current control module 110, a plurality of switching tube 120, voltage sample module 130 and switch control module 140.
Constant-current control module 110 is connected with AC power AC, for the LED load 200 of multichannel different colours provides Constant Electric Current.
A plurality of switching tubes 120 are for controlling the break-make of the Constant Electric Current of Multi-path LED load 200.With reference to figure 2, in this enforcement, switching tube 120 is metal-oxide-semiconductor, the anode of every paths of LEDs load 200 is connected with the positive output end of constant-current control module 110, negative terminal is connected with the drain electrode of corresponding metal-oxide-semiconductor, the source electrode of metal-oxide-semiconductor is connected with the negative output terminal of constant-current control module 110 and ground connection, and each metal-oxide-semiconductor is for controlling the light on and off of corresponding paths of LEDs load 200.In the present embodiment, switching tube 120 comprises switching tube M1 and switching tube M2, and that control the first paths of LEDs load LED1 light on and off is switching tube M1, and that control the second paths of LEDs load LED2 light on and off is switching tube M2.
The input of voltage sample module 130 is connected with the output of constant-current control module 110, constantly exports the sampled voltage VT of relevant voltage value according to the switching of mains switch K0.It should be noted that, the pressure value of sampled voltage VT is the time interval (or speed) of following the action of mains switch K0 open and close to change and change.
With reference to figure 3, 4, in the present embodiment, voltage sample module 130 with comprise the first resistance R 1 and the second resistance R 2, the positive output end downlink connection of the first end of the first resistance R 1 and constant-current control module 110, the second end is as the output of this voltage sample module 130 and be connected with the first end of the second resistance R 2, the second end of the second resistance R 2 is connected with ground with the negative output terminal of constant-current control module 110, a plurality of reference voltage sources of switch control module 140 access, the input of switch control module 140 is connected with the output of voltage sample module 130, according to the comparative result of sampled voltage VT and each reference voltage source, at output, export control signal to drive the break-make of corresponding switching tube 200, to control the light on and off of LED modules with different colors load 200, realize colour temperature adjusting.
In a further embodiment, LED colour temperature regulating circuit also comprises flow-dividing control module 150, flow-dividing control module 150 is connected with the output of switch control module 140, according to control signal, when driving Multi-path LED load 200 to light, for this Multi-path LED load 200, realizes flow-dividing control.When a plurality of control signals of switch control module 140 output drive a plurality of switching tubes 110 closed, 150 of flow-dividing control modules are triggered and start working, the Multi-path LED load being lit 200 is shunted in control, the electric current of realizing in every paths of LEDs load 200 equates, solved existing having while organizing different pressure drop LED load 200 more, the electric current that uncontrollable each group LED load is 200 equates, the problem that brightness is consistent.
With reference to figure 3,4, switch control module 140 comprises voltage comparison unit 142, counter U1 and first selector U2.
Voltage comparison unit 142 a plurality of reference voltage sources of access and sampled voltage VT, will export the first comparative result and the second comparative result after the plurality of reference voltage source and sampled voltage VT.In the present embodiment, voltage comparison unit 142 comprises a plurality of comparators, respectively sampled voltage VT is compared to rear output comparative result from the reference voltage source of different pressure values.
Its input of counter U1 D is connected with the output of voltage comparison unit 142, access is also carried out exporting at least two count results (A1 after additional calculation according to the first comparative result and the second comparative result, A2, A3 ...) to first selector U2, conventionally, while controlling two paths of LED load 200 work, counter U1 can select the counter (situation shown in Fig. 3) of two count results outputs, while controlling three paths of LEDs load 200 work, counter U1 can select the counter of three count results outputs, control 4 tunnels, 5 tunnels ... the needed counter U1 attribute of N paths of LEDs load 200 the like.
First selector U2 is connected with counter U1, access is also exported and is controlled signal to accordingly corresponding switching tube according to count results, the output of first selector U2 (Y1, Y2, Y3 ...) have a plurality ofly, as the output of switch control module 140, export above-mentioned control signal.In the present embodiment, the input of first selector U2 (A1, A2, A3 ...) quantity should with output (A1, A2, the A3 of counter U1 ...) the corresponding and corresponding connection of quantity, and the output of first selector U2 (Y1, Y2, Y3 ...) quantity should with output (A1, A2, the A3 of counter U1 ...) quantity corresponding.
Further, voltage comparison unit 142 comprises the first comparator C OMP1 and the second comparator C OMP2, and in the present embodiment, the first comparator C OMP1 is hysteresis comparator, and it has two positive input terminals and a negative input end.
The first positive input terminal of the first comparator C OMP1 accesses the first reference voltage source VF1, the second positive input terminal of the first comparator C OMP1 accesses the second reference voltage source VF2, the negative input end access sampled voltage VT of the first comparator C OMP1, the output of the first comparator C OMP1 is exported the first comparative result to the input D of counter U1.The positive input terminal access sampled voltage VT of the second comparator C OMP2, negative input end access the 3rd reference voltage source VF3 of the second comparator C OMP2, the output of the second comparator C OMP2 is exported the second comparative result to the clear terminal RB of counter U1.Wherein, the voltage of voltage > the 3rd reference voltage source VF3 of voltage > the second reference voltage source VF2 of the first reference voltage source VF1.
Flow-dividing control module 150 comprises logic control element 152 and the source follower 154 being connected between switch control module 140 and Multi-path LED load 200, the number of source follower 154 is less by 1 than the way of LED load, the output of logic control element 152 receiving key control modules 140 is (with reference to figure 3,4, the first output Y1, the second output Y2 and the 3rd output Y3) control signal of output carries out output logic signal after logical operation, and source follower 154 is controlled according to logical signal the electric current that Multi-path LED load 200 flows through and is equated.
With reference to figure 3, when needs control only have two paths of LED load 200 time, flow-dividing control module 150 its for when two paths of LED load 200 is simultaneously bright, control the size of current of that relatively little paths of LEDs load 200 of pressure drop; Further, when every increase by one paths of LEDs load 200, increase a source follower 154(in conjunction with Fig. 3,4), in all LED loads 200, when having a two paths of LED load more than 200 (to comprise two-way) simultaneously bright, that paths of LEDs load 200 except pressure drop maximum does not need to control outside its electric current, and other all need flow-dividing control module 150 to control its electric current flowing through.
Particularly, with reference to figure 3, when needs control only have two paths of LED load 200 time, flow-dividing control module 150 comprises and door G1, operational amplifier A MP1, second selector U2, the first metal-oxide-semiconductor M3 and adjustable resistance R3.In the present embodiment, form above-mentioned logic control element 152 with door G1, operational amplifier A MP1, second selector U2, the first metal-oxide-semiconductor M3 and adjustable resistance R3 form above-mentioned source follower 154, wherein:
With the first input end of door G1 and the second input respectively the first output Y1 adjacent with switch control module 140 be connected with the second output Y2, be connected with the grid of the first metal-oxide-semiconductor M3 with the output of door G1 and the input a1 of second selector U2.The source electrode of the first metal-oxide-semiconductor M3 passes through adjustable resistance R3 ground connection, and is connected with the source electrode of switching tube M1.Positive input terminal access the 4th reference voltage source Vref of operational amplifier A MP1, the negative input end of operational amplifier A MP1 is connected with the drain electrode of the first metal-oxide-semiconductor M3, and the output of operational amplifier A MP1 is connected with the first alternative passage k11 of second selector U2; The second alternative passage k12 of second selector U2 is connected with the first output Y1 of switch control module 140, and the output y1 of second selector U2 is connected with the control end of switching tube M1.The second output Y2 of switch control module 140 is connected with the control end of switching tube M2.Wherein, the break-make of the output y1 control switch pipe M1 of second selector U3 and the size of current that flows through switching tube M1; The break-make of the second output Y2 control switch pipe M2 of switch control module 140, controls the break-make of the constant-current source of the first paths of LEDs load LED1 and the second paths of LEDs load LED2 with this.
With reference to figure 3, the operation principle of flow-dividing control module 150 is as follows: the output signal Y1 of first selector U2 and Y2, and the wherein open and close of the direct control switch pipe of Y2 signal M2, switching tube M2 opens during Y2=1; During Y2=0, switching tube M2 closes.And the not directly open and close of control switch pipe M1 of Y1 signal, but by second selector U3, select the open and close of control switch pipe M1 with the output of an operational amplifier A MP1.While being 1 when Y1 is different with Y2, second selector U3 output signal is the y1 identical with Y1, and the first metal-oxide-semiconductor M3 closes, i.e. the open and close of the direct control switch pipe of Y1 M1; When Y1 and Y2 are 1 simultaneously, second selector U3 selects the grid that outputs to switching tube M1 of amplifier AMP1, the first metal-oxide-semiconductor M3 opens, now operational amplifier A PM1, switching tube M1 and adjustable resistance R3 form a source follower, by the electric current I 1=Vref/R3 of LED load LED1, only need the resistance of regulating resistance R3, make the electric current I 1 that flows through LED load LED1 equal 1/2 of constant-current control module 110 total output currents, can guarantee to flow through LED load LED1 consistent with the electric current of LED load LED2, be 1/2 of output total current.In this example, LED lamp string requires the forward conduction voltage of LED load LED1 to be less than the forward conduction voltage of LED load LED2.
With reference to figure 4, when LED load 200Wei tri-tunnels that needs are controlled are in parallel (being respectively LED1, LED2, LED3), counter U1 can select the counter of three count results outputs, and first selector U2 selects the selector with corresponding three outputs of counter U1.Two source followers 154 are respectively used to control LED load LED1 and LED2, and the circuit theory of two source followers 154 can be used for reference Fig. 3 embodiment.
In the present embodiment, logic control element 152 comprise four with door and two or, be connected with the first output Y1, the second output Y2, the 3rd output Y3 of first selector U2 respectively with three inputs of door G11, output Y123 simultaneously and or an input of door input of G15 or a G16 be connected; Be connected with the first output Y1, the second output Y2 of first selector U2 respectively with two inputs of door G12, output Y12 with or door G15 the second input be connected; Be connected with the second output Y2, the 3rd output Y3 of first selector U2 respectively with two inputs of door G13, output Y23 with or door G16 the second input be connected; Be connected with the first output Y1, the 3rd output Y3 of first selector U2 respectively with two inputs of door G14, output Y13 with or door G15 the 3rd input be connected.Or the output E2 of the output E1 of door G15 or door G16 is connected with the input a1 of second selector U3 in two source followers 154 and the grid in metal-oxide-semiconductor respectively.In other embodiments, the LED load 200 of need controlling when more, can adapt to increase source follower 154, and logic control element 152 can reset according to above-mentioned principle.
In conjunction with 3,5, the two-way parallel connection LED load of take is example, and the operation principle of LED colour temperature regulate electrical current is described:
By the first resistance R 1 and the 2nd R2 pressure-dividing output voltage, produce a sampled voltage VT, by the variation of sampled voltage VT, indirectly reflect the opening and closing state of mains switch K0.When mains switch K0 opens, 110 work of prime constant-current control module, sampled voltage VT rises; When mains switch K0 closes, prime constant-current control module 110 quits work, and sampled voltage VT declines.Sampled voltage VT by hysteresis comparator COMP1 and comparator C OMP2 respectively with three reference voltage V F1, VF2 and VF3(VF1>VF2>VF3) relatively, then by a counter U1 and first selector U2, export, the open and close state of mains switch K0 can be converted to the switching signal of control switch (switching tube) M1 and M2, realize and regulate colour temperature.Specific works process is as follows:
When mains switch K0 opens for the first time, constant-current control module 110 work, sampled voltage VT>VF1, now the first comparator C OMP1 is output as low level, counter U1 output signal A1A2=00, by first selector U2, select output signal Y1Y2=11, control switch pipe M1 and M2 open simultaneously, and LED load LED1 and LED2 are simultaneously bright.
When mains switch, K0 closes for the first time, constant-current control module 110 quits work, sampled voltage VT starts to decline, when sampled voltage VT drops to VF3<VT<VF2, the first comparator C OMP1 output switching activity is high level, counter U1 state variation, output signal A1A2=01, by first selector U2, select output signal Y1Y2=01, control switch pipe M1 closes, and control switch pipe M2 opens.When mains switch K0 opens for the second time, LED load LED1 goes out like this, and LED2 is bright in LED load, and colour temperature is adjusted.Sampled voltage VT increases to VT>VF1 again simultaneously, and the first comparator C OMP1 output switching activity is low level, because counter U1 is that rising edge triggers, therefore state keeps.
When mains switch, K0 closes for the second time, when as long as sampled voltage VT drops to VF3<VT<VF2, the first comparator C OMP1 output again upset is high level, counter U1 exporting change A1A2=10, first selector U2 output signal Y1Y2=10, be that control switch pipe M1 opens, control switch pipe M2 closes.When mains switch K0 opens for the third time, LED1 is bright in output LED load like this, and LED load LED2 goes out, and colour temperature is conditioned, and the state of same counter U1 is held.
When mains switch K0 closes for the third time, when VF3<VT<VF2, counter U1 output becomes A1A2=00 again, first selector U2 output becomes Y1Y2=11 again, control switch pipe M1 and control switch pipe M2 open simultaneously, when mains switch K0 opens for the 4th time, LED load LED1 and LED2 reply simultaneously bright state again, and colour temperature is conditioned back initial condition.
As long as the switching speed of mains switch K0 can make K0 turn off process sampled voltage VT remain between the second reference voltage source VF2 and the 3rd reference voltage source VF3, can realize the function that LED colour temperature is adjusted in circulation by repeating open and close mains switch K0 like this.
When the shut-in time of mains switch K0 long enough, while causing sampled voltage VT to drop to VT<VF3, the second comparator C OMP2 output will be low level by high level upset, by counter U1 set, it is initial condition, export the state of A1A2=00, when no matter last K0 opens, be what state, when K0 opens next time, exporting LED load can be all LED1 and the simultaneously bright state of LED2.
In addition, also provide a kind of LED lighting device, comprised above-mentioned LED colour temperature regulating circuit.
Above-mentioned LED colour temperature regulating circuit and LED lighting device are exported the sampled voltage VT of different pressure values according to the unlatching of mains switch K0 and off-state by voltage detection module 120, switch control module 140 is controlled LED load 200 light on and off of different colours according to different sampled voltage VT, only rely on the unlatching of mains switch K0 to turn-off to realize the object that regulates LED colour temperature, the composition of modules is simple, and cost is low.While opening for fear of the LED lamp when different colours multi-channel parallel, because its forward conduction voltage is inconsistent, cause the inconsistent problem of output current simultaneously, current uniform when also being realized multi-path parallel LEDs load 200 and opened simultaneously by a flow-dividing control module 150, output current is consistent.
These are only preferred embodiment of the present utility model, not in order to limit the utility model, all any modifications of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in protection range of the present utility model.
Claims (8)
1. a LED colour temperature regulating circuit, is connected with AC power by a mains switch, and described LED colour temperature regulating circuit comprises constant-current control module, this constant-current control module is connected with described AC power, for the LED load of multichannel different colours provides Constant Electric Current, it is characterized in that, also comprise:
A plurality of switching tubes, for controlling the break-make of the described Constant Electric Current of described Multi-path LED load;
Voltage sample module, is connected with the output of described constant-current control module, constantly exports the sampled voltage of relevant voltage value according to the switching of described mains switch;
Switch control module, access a plurality of reference voltage sources, the input of described switch control module is connected with the output of described voltage sample module, according to described sampled voltage and described in each comparative result of reference voltage source in output output control signal to drive the break-make of corresponding described switching tube, to control the light on and off of LED modules with different colors load, realize colour temperature and regulate.
2. LED colour temperature regulating circuit according to claim 1, is characterized in that, described switch control module comprises voltage comparison unit, counter and first selector, wherein,
The described voltage comparison unit described a plurality of reference voltage sources of access and described sampled voltage, output the first comparative result and the second comparative result;
Described counter is connected with described voltage comparison unit, and access is also carried out exporting at least two count results to first selector after additional calculation according to described the first comparative result and described the second comparative result;
Described first selector is connected with described counter, and access also controls signal to corresponding described switching tube described in described count results output accordingly.
3. LED colour temperature regulating circuit according to claim 2, is characterized in that, described voltage comparison unit comprises the first comparator and the second comparator, wherein,
The first positive input terminal of described the first comparator accesses the first reference voltage source, the second positive input terminal and accesses that the second reference voltage source, negative input end access described sampled voltage, output is exported described the first comparative result to the input of described counter;
The positive input terminal of described the second comparator accesses described sampled voltage, negative input end access the 3rd reference voltage source, output is exported the second comparative result to the clear terminal of described counter;
Wherein, the voltage of voltage > the 3rd reference voltage source of voltage > second reference voltage source of described the first reference voltage source.
4. according to the LED colour temperature regulating circuit described in claim 1,2 or 3, it is characterized in that, also comprise flow-dividing control module, described flow-dividing control module is connected with the output of described switch control module, according to described control signal when described in driving multichannel, LED load is lighted for LED load described in this multichannel realizes flow-dividing control.
5. LED colour temperature regulating circuit according to claim 4, it is characterized in that, described flow-dividing control module comprises and is connected to described in described switch control module and multichannel the logic control element between LED load and number than the source follower of the way of described LED load little 1, the described control signal that described logic control element receives the output of described switch control module is carried out output logic signal after logical operation, and described source follower is controlled according to described logical signal the electric current that LED load is flow through described in multichannel and equated.
6. LED colour temperature regulating circuit according to claim 4, is characterized in that, described flow-dividing control module comprises and door, operational amplifier, second selector, the first metal-oxide-semiconductor and adjustable resistance, wherein,
Described with door first input end is connected with the second output with the first output of described switch control module respectively with the second input, described with output be connected with the control end of described the first metal-oxide-semiconductor with the input of described second selector;
The source electrode of described the first metal-oxide-semiconductor passes through described adjustable resistance ground connection, and is connected with the source electrode of switching tube described in first;
Positive input terminal access the 4th reference voltage source of described operational amplifier, negative input end are connected with the drain electrode of described the first metal-oxide-semiconductor, output is connected with the first alternative passage of described second selector;
The second alternative passage of described second selector is connected with described first output of described switch control module, and the output of described second selector is connected with the control end of switching tube described in described first.
7. according to the LED colour temperature regulating circuit described in claim 1,2 or 3, it is characterized in that, described voltage sample module with comprise the first resistance and the second resistance, the anode downlink connection of the first end of described the first resistance and described constant-current control module, the second end is as the output of described voltage sample module and be connected with the first end of described the second resistance, and the second end of described the second resistance is connected with the negative terminal of described constant-current control module.
8. a LED lighting device, is characterized in that, comprises the LED colour temperature regulating circuit described in claim 1 to 7 any one.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420149070.9U CN203775490U (en) | 2014-03-28 | 2014-03-28 | LED color temperature adjusting circuit and LED lighting device |
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| CN201420149070.9U CN203775490U (en) | 2014-03-28 | 2014-03-28 | LED color temperature adjusting circuit and LED lighting device |
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| CN203775490U true CN203775490U (en) | 2014-08-13 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219840A (en) * | 2014-08-27 | 2014-12-17 | 深圳市芯飞凌半导体有限公司 | LED switch color temperature regulation controller and LED drive circuit |
| CN104602407A (en) * | 2014-12-31 | 2015-05-06 | 刘强 | LED (light emitting diode) power source capable of using switch to arbitrarily set color temperatures and color temperature setting method thereof |
| CN105764201A (en) * | 2016-05-04 | 2016-07-13 | 无锡硅动力微电子股份有限公司 | Color temperature adjusting control circuit |
| CN109348581A (en) * | 2018-11-20 | 2019-02-15 | 华南理工大学 | A kind of four-way exchange driving chip circuit |
| CN111836420A (en) * | 2019-04-17 | 2020-10-27 | 漳州立达信光电子科技有限公司 | LED driving method, circuit, LED device and driving power module |
| CN117013210A (en) * | 2023-10-07 | 2023-11-07 | 江苏华友能源科技有限公司 | Temperature sensing and inductance integrated busbar and battery pack internal temperature acquisition method |
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2014
- 2014-03-28 CN CN201420149070.9U patent/CN203775490U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104219840A (en) * | 2014-08-27 | 2014-12-17 | 深圳市芯飞凌半导体有限公司 | LED switch color temperature regulation controller and LED drive circuit |
| CN104219840B (en) * | 2014-08-27 | 2017-05-10 | 深圳市芯飞凌半导体有限公司 | LED switch color temperature regulation controller and LED drive circuit |
| CN104602407A (en) * | 2014-12-31 | 2015-05-06 | 刘强 | LED (light emitting diode) power source capable of using switch to arbitrarily set color temperatures and color temperature setting method thereof |
| CN105764201A (en) * | 2016-05-04 | 2016-07-13 | 无锡硅动力微电子股份有限公司 | Color temperature adjusting control circuit |
| CN109348581A (en) * | 2018-11-20 | 2019-02-15 | 华南理工大学 | A kind of four-way exchange driving chip circuit |
| CN111836420A (en) * | 2019-04-17 | 2020-10-27 | 漳州立达信光电子科技有限公司 | LED driving method, circuit, LED device and driving power module |
| CN117013210A (en) * | 2023-10-07 | 2023-11-07 | 江苏华友能源科技有限公司 | Temperature sensing and inductance integrated busbar and battery pack internal temperature acquisition method |
| CN117013210B (en) * | 2023-10-07 | 2023-12-08 | 江苏华友能源科技有限公司 | Temperature sensing and inductance integrated busbar and battery pack internal temperature acquisition method |
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