CN105979660A - LED lamp, and LED colour temperature adjusting control chip and circuit - Google Patents

LED lamp, and LED colour temperature adjusting control chip and circuit Download PDF

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Publication number
CN105979660A
CN105979660A CN201610471162.2A CN201610471162A CN105979660A CN 105979660 A CN105979660 A CN 105979660A CN 201610471162 A CN201610471162 A CN 201610471162A CN 105979660 A CN105979660 A CN 105979660A
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China
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signal
input
outfan
gate
output
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CN105979660B (en
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林剑辉
董鑫
胡渊
王燕晖
苏丹
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Fuman Microelectronics Group Co ltd
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Limited Co Of Fu Man Electronics Group Of Shenzhen
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]

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Abstract

The invention belongs to the technical field of semiconductor integrated circuits, and discloses an LED lamp, and an LED colour temperature adjusting control chip and circuit. In the invention, the LED colour temperature adjusting control chip including a low-voltage detection module, a state output module and a drive module is adopted; therefore, the low-voltage detection module alternatively outputs corresponding detection signals according to change of output voltage; furthermore, when the output voltage is less than a pre-set value, the low-voltage detection module outputs a first detection signal to the state output module; when the output voltage is greater than the pre-set value, the low-voltage detection module outputs a second detection signal to the state output module; the state output module outputs corresponding state signals to the drive module within a pre-set time according to the jump number from the first detection signal to the second detection signal; the drive module drives multiple constant-current chips according to a state signal, such that control of multiple constant-current chips is realized; the structure is simple; the cost is low; and thus, the problems that the existing LED colour temperature adjusting control circuit is large in volume and high in cost can be solved.

Description

A kind of LED, LED colour temperature regulation control chip and circuit
Technical field
The invention belongs to semiconductor integrated circuit technical field, particularly relate to a kind of LED, LED colour temperature regulation control chip And circuit.
Background technology
In recent years, LED substitutes traditional electric filament lamp and is widely used as mains lighting supply, and along with people couple The raising of LED illumination power requirement and the development of LED technology, the LED illumination power supply of adjustable color temperature has become a kind of new Development trend.
At present, existing LED colour temperature adjusting control circuit mainly controls the work of constant current chip by colour temperature regulation control chip Whether, thus realize the colour temperature to LED and regulate control.Wherein, existing colour temperature regulation control chip includes clock detection Module, noise suppression module, state-storage module and driving module；Outside clock detection module is to colour temperature adjusting control circuit The on off state of portion's power supply detects, and the detection signal that clock detection module exports is filtered processing by noise suppression module, State-storage module according to this filtered detection signal output drive signal to drive constant current chip, and then realize to LED Colour temperature regulation control.
Although the colour temperature regulation that existing LED colour temperature adjusting control circuit can realize LED controls, but its internal colour temperature is adjusted The function of the noise suppression module in joint control chip needs to use agitator sum counter to be achieved, and enumerator is by multiple Counting chip cascade forms, and it needs to expend substantial amounts of chip area, and adds chip cost, and then makes existing LED The volume of colour temperature adjusting control circuit is big and cost is high.
In sum, there is the problem that volume is big and cost is high in existing LED colour temperature adjusting control circuit.
Summary of the invention
It is an object of the invention to provide a kind of LED colour temperature regulation control chip, it is intended to solve the regulation control of existing LED colour temperature There is the problem that volume is big and cost is high in circuit processed.
The present invention is achieved in that a kind of LED colour temperature regulation control chip, in order to drive multiple constant current chip to multiple LED Lamp string carries out colour temperature regulation, described LED colour temperature regulation control chip include low voltage detecting module, State-output module and Drive module；
The output voltage of the pressure filter circuit outside voltage input end reception of described low voltage detecting module, described low-voltage is examined The signal output part surveying module is connected with the signal input part of described State-output module, the signal output of described State-output module End is connected with the signal input part of described driving module, and the signal output part of described driving module is with multiple described constant current chips even Connect；
Described low pressure detection module detects signal, when described output voltage accordingly according to the change alternately output of described output voltage During less than preset value, described low voltage detecting module output the first detection signal is to described State-output module；When described output electricity When pressure is more than preset value, described low voltage detecting module output the second detection signal is to described State-output module；Described state is defeated Go out module corresponding to the transition times output of described second detection signal saltus step according to described first detection signal in Preset Time Status signal to described driving module；Described driving module drives multiple described constant current chips according to described status signal.
Another object of the present invention also resides in a kind of LED colour temperature adjusting control circuit of offer, and the regulation of described LED colour temperature controls electricity Road includes rectification circuit, pressure filter circuit, multiple constant current chip, multiple LED string and the regulation of above-mentioned LED colour temperature Control chip；
After the voltage that external power source is exported by described pressure filter circuit carries out divider filter, output is controlled to the regulation of described LED colour temperature Coremaking sheet, described rectification circuit carries out rectification process to the output voltage of described external power source, and a described constant current chip drives one Individual described LED string.
A further object of the present invention also resides in a kind of LED of offer, and described LED includes above-mentioned LED colour temperature regulation control Circuit processed.
In the present invention, include low voltage detecting module, State-output module by employing and drive the LED colour temperature of module Regulation control chip so that low pressure detection module detects signal accordingly according to the change alternately output of output voltage, and when output When voltage is less than preset value, low voltage detecting module output the first detection signal to State-output module, when output voltage is more than pre- If during value, low voltage detecting module output the second detection signal is to State-output module；State-output module root in Preset Time Corresponding status signal is exported to driving module to the transition times of the second detection signal saltus step according to the first detection signal；Drive module Drive multiple constant current chips according to status signal, to realize the control to multiple constant current chips, and then make to include above-mentioned LED The LED colour temperature adjusting control circuit of colour temperature regulation control chip realizes the colour temperature to LED string and regulates, owing to decreasing noise Suppression module, therefore, the present invention includes the structure of the LED colour temperature adjusting control circuit of above-mentioned LED colour temperature regulation control chip Simply, low cost, and then solve existing LED colour temperature adjusting control circuit and there is the problem that volume is big and cost is high.
Accompanying drawing explanation
Fig. 1 is the modular structure schematic diagram of the LED colour temperature regulation control chip that one embodiment of the invention is provided；
Fig. 2 is the modular structure schematic diagram of the LED colour temperature regulation control chip that another embodiment of the present invention is provided；
Fig. 3 is the modular structure schematic diagram of the LED colour temperature regulation control chip that further embodiment of this invention is provided；
Fig. 4 is the circuit knot of the low voltage detecting module in the LED colour temperature regulation control chip that one embodiment of the invention is provided Structure schematic diagram；
Fig. 5 is the power supply unit of the reset control module in the LED colour temperature regulation control chip that one embodiment of the invention is provided Electrical block diagram；
Fig. 6 is that the reset of the reset control module in the LED colour temperature regulation control chip that one embodiment of the invention is provided controls The electrical block diagram of signal signal generating unit；
Fig. 7 is the circuit structure of the State-output module in the LED colour temperature regulation control chip that one embodiment of the invention is provided Schematic diagram；
Fig. 8 is the circuit structure signal of the driving module in the LED colour temperature regulation control chip that one embodiment of the invention is provided Figure；
Fig. 9 is the electrical block diagram of the LED colour temperature adjusting control circuit that one embodiment of the invention is provided.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, to this Bright it is further elaborated.Should be appreciated that specific embodiment described herein, and need not only in order to explain the present invention In limiting the present invention.
Below in conjunction with concrete accompanying drawing, the realization of the present invention is described in detail:
Fig. 1 show the present invention one implement provided LED colour temperature regulation control chip modular structure, for convenience of description, Only illustrating the part relevant to the embodiment of the present invention, details are as follows:
In the present embodiment, LED colour temperature regulation control chip 10 is connected with outside multiple constant current chip (not shown)s, In order to multiple driving constant current chips, multiple LED string (not shown)s are carried out colour temperature regulation.As it is shown in figure 1, this The LED colour temperature regulation control chip 10 that bright embodiment is provided includes low voltage detecting module 100, State-output module 101 And drive module 102.
Wherein, the pressure filter circuit (not shown) outside voltage input end reception of low voltage detecting module 100 is defeated Going out voltage, the signal output part of low voltage detecting module 100 is connected with the signal input part of State-output module 101, and state is defeated Go out module 101 signal output part and drive module 102 signal input part is connected, drive module 102 signal output part and Multiple constant current chip (not shown)s connect.
Low pressure detection module 100 detects signal accordingly according to the change alternately output of the output voltage received, and works as output voltage During less than preset value, low voltage detecting module 100 exports the first detection signal to State-output module 101, when output voltage is big When preset value, low voltage detecting module 100 exports the second detection signal to State-output module 101；State-output module 101 Corresponding status signal is exported to driving according to the first detection signal to the transition times of the second detection signal saltus step in Preset Time Dynamic model block 102；Module 102 is driven to drive multiple constant current chips according to status signal.
In the present embodiment, the jumping to the second detection signal of the one time first detection signal is often received due to State-output module 101 Become and all its output state can be updated, therefore, when State-output module 101 repeatedly receives the first inspection in Preset Time Survey signal is when the second detection signal saltus step, and State-output module 101 can export corresponding status signal according to transition times；This Outward, the first detection signal of low voltage detecting module 100 output is low level signal, and the second detection signal is high level signal, The most in other embodiments, the first detection signal of low voltage detecting module 100 output is high level signal, low voltage test Second detection signal of module 100 output is low level signal；The status signal of State-output module 101 output includes but does not limits In low and high level signal；Furthermore, preset value and Preset Time all can be actually needed according to user and be set.
Further, Fig. 2 shows that the LED colour temperature that another embodiment of the present invention is provided regulates the modular structure of control chip, For convenience of description, only illustrating the part relevant to the embodiment of the present invention, details are as follows:
As in figure 2 it is shown, it is to regulate control chip in the colour temperature shown in Fig. 1 that the LED colour temperature regulation shown in the present embodiment controls core Reset control module 103 is added on the basis of 10.The voltage input end of this reset control module 103 receives pressure filter circuit Output voltage, the signal output part of this reset control module 103 be State-output module 101 reseting controling end connect.
Wherein, when pressure filter circuit has voltage to export, and State-output module 101 detects to second at the first detection signal When the transition times of signal saltus step reaches preset times, reset control module 103 resets according to output voltage output state and controls letter Number to State-output module 101, so that self output state is carried out by State-output module 101 according to state reset control signal Reset processing；When pressure filter circuit Non voltage output, and during the charging capacitor discharge off of pressure filter circuit, reset and control Module 103 output state reseting controling signal is to State-output module 101, so that State-output module 101 is according to state reset Control signal carries out reset processing to self output state.
Further, as it is shown on figure 3, reset control module 103 includes that power supply unit 103a generates list with reseting controling signal Unit 103b；The voltage input end of power supply unit 103a is the voltage input end of reset control module 103, power supply unit 103a Voltage output end be connected with the voltage input end of reseting controling signal signal generating unit 103b, reseting controling signal signal generating unit The signal output part of 103b is the signal output part of reset control module 103.
When pressure filter circuit has voltage to export, and State-output module 101 detects signal saltus step at the first detection signal to second Time transition times when reaching preset times, power supply unit 103a the output voltage of pressure filter circuit is carried out voltage conversion with Output reset running voltage is to reseting controling signal signal generating unit 103b, and reseting controling signal signal generating unit 103b is according to reset work Make voltage output state reseting controling signal to State-output module 101, so that State-output module 101 is according to this state reset Control signal carries out reset processing to self output state；When pressure filter circuit Non voltage output, and the filling of pressure filter circuit During electricity electric capacity discharge off, reseting controling signal signal generating unit 103b output state reset signal to State-output module 101, with Make State-output module 101, according to this state reset signal, self output state be carried out reset processing.
Further, as it is shown on figure 3, low voltage detecting module 100 includes control unit 100a and detection signal signal generating unit 100b。
Wherein, the input of control unit 100a connects formation low voltage test altogether with the input of detection signal signal generating unit 100b The voltage input end of module 100, the outfan of control unit 100a is connected with the control end of detection signal signal generating unit 100b, The signal output part that outfan is low voltage detecting module 100 of detection signal signal generating unit 100b.
Concrete, the output voltage of pressure filter circuit is detected by control unit 100a, and exports corresponding control signal To detection signal signal generating unit 100b, detection signal signal generating unit 100b generates according to control signal and detects signal accordingly.
Further, as it is shown on figure 3, State-output module 101 includes that pulse signal signal generating unit 101a, status signal export Unit 101b and state reset unit 101c.
Wherein, the input of pulse signal signal generating unit 101a is the signal input part of State-output module 101, pulse signal The outfan of signal generating unit 101a is connected with the input of status signal outputting unit 101b, status signal outputting unit 101b The first outfan be connected with the first input end of state reset unit 101c, status signal outputting unit 101b second output End is connected with second input of state reset unit 101c, and the 3rd input of state reset unit 101c is State-output mould The reseting controling end of block 101, the outfan of state reset unit 101c is connected with the reset terminal of status signal outputting unit 101b, The signal output part that 3rd outfan is State-output module 101 of status signal outputting unit 101b.
Concrete, when the first detection signal detects signal saltus step to second, pulse signal signal generating unit 101a is according to the second inspection Survey signal and generate pulse signal；Status signal outputting unit 101b is according to the number of times output of the pulse signal generated in Preset Time Corresponding status signal；The state reset control signal that state reset unit 101c exports according to reset control module 103 is to shape The output state of state output module 101 carries out reset processing.
Further, as one embodiment of the present invention, as shown in Figure 4, control unit 100a includes the first switch element Q1, second switch element Q2, the 3rd switch element Q3, the 4th switch element Q4, the 5th switch element Q5, the 6th switch Element Q6, the 7th switch element Q7, the 8th switch element Q8, the 9th switch element Q9, the tenth switch element Q10, 11 switch element Q11, twelvemo close element Q12, the 13rd switch element Q13, the first resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first diode D1, the two or two pole Pipe D2 and the 3rd diode D3.
The input of the first switch element Q1, first end of the first resistance R1, the input of the 7th switch element Q7 and First end of five resistance R5 connects the input forming control unit 100a altogether；The control end of the first switch element Q1 and outfan Being connected to first end of the first resistance R1 altogether, second end of the first resistance R1 is connected with the input of second switch element Q2, the Control end and the outfan of two switch element Q2 are connected to the input of the 3rd switch element Q3, the control of the 3rd switch element Q3 altogether End processed and outfan are connected to the input of the 4th switch element Q4 altogether, and the control end of the 4th switch element Q4 connects altogether with outfan In the input of the 5th switch element Q5, the control end of the 5th switch element Q5 and outfan are connected to the first diode D1 altogether Negative electrode, the negative electrode of the anode of the first diode D1 and the second diode D2 connects, the anode and second of the second diode D2 First end of resistance R2, the anode of the 3rd diode D3, the control end of the 13rd switch element Q13 and twelvemo are closed The input of element Q12 and control end connect, second end of the second resistance R2 and first end and the 6th of the 3rd resistance R3 The input of switch element Q6 connects, and second end of the 3rd resistance R3 and the outfan of the 6th switch element Q6 are connected to ground altogether, First end controlling end and second end of the 5th resistance R5 and the 6th resistance R6 of the 7th switch element Q7 connects, and the 7th opens The input of the outfan and the 8th switch element Q8 that close element Q7 connects, the outfan of the 8th switch element Q8 and control end Being connected to the input of the 9th switch element Q9 altogether, the outfan of the 9th switch element Q9 is connected to the tenth switch unit altogether with controlling end The outfan of part Q10, the outfan of the tenth switch element Q10 is connected to the input of the 11st switch element Q11 altogether with controlling end End, the outfan of the 11st switch element Q11 is connected to first end of the 4th resistance R4 altogether with controlling end, the 4th resistance R4's The negative electrode of the second end and the 3rd diode D3 connects, and twelvemo closes outfan and the 13rd switch element Q13 of element Q12 Outfan be connected to ground altogether, the input of the 13rd switch element Q13 and second end of the 6th resistance R6 connect formation altogether and control singly The outfan of unit 100a.
Further, as one embodiment of the present invention, as shown in Figure 4, detection signal signal generating unit 100b includes the tenth Four switch element Q14, the 15th switch element Q15, sixteenmo close element Q16, the 17th switch element Q17, the tenth Eight switch element Q18, the 19th switch element Q19, the 20th switch element Q20, the 21st switch element Q21, Two twelvemos close element Q22 and the 23rd switch element Q23.
Concrete, the 14th switch element Q14 controls end, the control end of the 15th switch element Q15, sixteenmo pass The end that controls controlling end and the 17th switch element Q17 of element Q16 connects the control forming detection signal signal generating unit 100b altogether End processed, the input of the 14th switch element Q14, the input of the 20th switch element Q20 and the second twelvemo close unit The input of part Q22 connects the input forming detection signal signal generating unit 100b, the outfan of the 14th switch element Q14 altogether It is connected with the input of the 15th switch element Q15 and the input of eighteenmo pass element Q18, the 15th switch element The outfan of Q15, eighteenmo close element Q18 control end, sixteenmo closes the input of element Q16, the 19th open Close element Q19 controls end, the control end of the 20th switch element Q20 and the control end of the 21st switch element Q21 Connect altogether, the outfan of sixteenmo pass element Q16 and the input of the 17th switch element Q17 and the 19th switch element The outfan of Q19 connects, the output head grounding of the 17th switch element Q17, the input termination of the 19th switch element Q19 Receive rectification circuit output voltage, the outfan of the 20th switch element Q20, the input of the 21st switch element Q21, Second twelvemo is closed the control end controlling end and the 23rd switch element Q23 of element Q22 and is connect altogether, and the second twelvemo is closed Single the connecing altogether with the input of the 23rd switch element Q23 of the output of element Q22 forms the defeated of detection signal signal generating unit 100b Going out end, the input of the 23rd switch element Q23 and the control end of the 6th switch element Q6 connect, the 21st switch unit The outfan of part Q21 and the outfan of the 23rd switch element Q23 are connected to ground altogether.
In the present embodiment, the first switch element Q1, second switch element Q2, the 3rd switch element Q3, the 4th switch unit Part Q4, the 5th switch element Q5, the 7th switch element Q7, the 8th switch element Q8, the 9th switch element Q9, the tenth Switch element Q10, the 11st switch element Q11, the 14th switch element Q14, the 15th switch element Q15, the 18th Switch element Q18, the 20th switch element Q20 and the 21st switch element Q21 are PMOS, PMOS Grid, source electrode and drain electrode be respectively the first switch element Q1, second switch element Q2, the 3rd switch element Q3, the Four switch element Q4, the 5th switch element Q5, the 7th switch element Q7, the 8th switch element Q8, the 9th switch element Q9, the tenth switch element Q10, the 11st switch element Q11, the 14th switch element Q14, the 15th switch element Q15, Eighteenmo closes element Q18, the 20th switch element Q20 and the control end of the 21st switch element Q21, input With outfan.
Additionally, the 6th switch element Q6, twelvemo close element Q12, the 13rd switch element Q13, sixteenmo pass unit Part Q16, the 17th switch element Q17, the 19th switch element Q19, the 21st switch element Q21 and the 23rd Switch element Q23 is NMOS tube, the grid of NMOS tube, drain electrode and source electrode be respectively the 6th switch element Q6, the tenth Two switch element Q12, the 13rd switch element Q13, sixteenmo close element Q16, the 17th switch element Q17, the tenth Nine switch element Q19, the 21st switch element Q21 and the control end of the 23rd switch element Q23, input and Outfan.
In the present embodiment, include that the low voltage detecting module 100 of multiple switch element substitutes in prior art by many by employing The clock signal detection module of individual clock chip cascade so that the knot of the LED colour temperature regulation control chip 10 that the present embodiment provides Structure is simple, cost reduces.
Further, as one embodiment of the present invention, as it is shown in figure 5, power supply unit 103a includes the 24th switch Element Q24, the 25th switch element Q25, second sixteenmo close element Q26, the 27th switch element Q27, the 7th Resistance R7, the 8th resistance R8, the 9th resistance R9 and the 4th diode D4.
Wherein, the of the input of the 24th switch element Q24, first end of the 7th resistance R7 and the 9th resistance R9 One end meets the voltage input end forming power supply unit 103a, the control end of the 24th switch element R24 and the 7th resistance R7 altogether The second end and the 8th resistance R8 first end connect, the outfan of the 24th switch element Q24 with the 25th switch The outfan of element Q25 and the input of the 27th switch element Q27 and outfan are connected to ground altogether, the 8th resistance R8's Second end and the second sixteenmo close the negative electrode controlling end and the 4th diode D4 of element Q26 and connect, the 4th diode D4 Anode and the control end of the 25th switch element Q25 and input connect, second end and the 26th of the 9th resistance R9 The input of switch element Q26 connects, and the second sixteenmo closes outfan and the 27th switch element Q2Q7 of element Q26 Control end altogether connect formed power supply unit 103a voltage output end.
In the present embodiment, the 24th switch element Q24 is PMOS, the grid of this PMOS, source electrode and drain electrode It is respectively control end, input and the outfan of the 24th switch element Q24；25th switch element Q25, the 20th Six switch element Q26 and the 27th switch element Q27 are NMOS tube, and the grid of NMOS tube, drain electrode divide with source electrode Be not the 25th switch element Q25, the second sixteenmo close element Q26 and the control end of the 27th switch element Q27, Input and outfan.
Further, as one embodiment of the present invention, as shown in Figure 6, reseting controling signal signal generating unit 103b includes Second eighteenmo closes element Q28, the 29th switch element Q29, the 30th switch element Q30, the 31st switch element Q31, thirty-twomo close element Q32, the 33rd switch element Q33, the 34th switch element Q34, the 35th Switch element Q35, three sixteenmos close element Q36, the 37th switch element Q37, the 3rd eighteenmo close element Q38, the Ten resistance R10, the 11st resistance R11, the 12nd resistance R12 and the 13rd resistance R13.
Wherein, first end of the tenth resistance R10, the second eighteenmo close the input of element Q28, the 13rd resistance R13 First end, the input of the 31st switch element Q31, the input and the 38th of the 33rd switch element Q33 The input of switch element Q38 meets the voltage input end forming reseting controling signal signal generating unit 103b, the tenth resistance R10 altogether The second end and first end of the 11st resistance R11 and the second eighteenmo close the outfan of element Q28 and connect, the 11st electricity Second end of resistance R11 and first end of the 12nd resistance R12, the control end and the 29th of the 30th switch element Q30 The control end of switch unit Q29 part connects, second end of the 12nd resistance R12 and the outfan of the 29th switch element Q29 Connecting, the second eighteenmo closes control end and second end of the 13rd resistance R13, the 30th switch element Q30 of element Q28 Input, control end and the thirty-twomo of the 31st switch element Q31 close the control end of element Q32 and connect, the The outfan of 30 switch element Q30 and the input of the 29th switch element Q29, thirty-twomo close element Q32's Outfan, the outfan of the 35th switch element Q35, the 3rd sixteenmo close the outfan and the 37th of element Q36 The outfan of switch element Q37 connects, and the outfan of the 31st switch element Q31, thirty-twomo close element Q32's Input, control end, the control end and the 35th of the 34th switch element Q34 of the 33rd switch element Q33 The control end of switch element Q35 connects altogether, the outfan of the 33rd Q33 switch element, the 34th switch element Q34 Input, the 3rd sixteenmo close control end, the control end and the 38th of the 37th switch element Q37 of element Q36 The control end of switch element Q38 connects altogether, the outfan of the 34th switch element Q34 and the 35th switch element Q35's Input connects, and the input of outfan and the 37th switch element Q37 that the 3rd eighteenmo closes element Q38 connects formation altogether The signal output part of reseting controling signal signal generating unit 103b.
In the present embodiment, the second eighteenmo closes element Q28, the 31st switch element Q31, the 33rd switch element Q33 and the 3rd eighteenmo close element Q38 and are PMOS, and the grid of PMOS, source electrode and drain electrode are respectively second Eighteenmo closes element Q28, the 31st switch element Q31, the 33rd switch element Q33 and the 3rd eighteenmo and closes element Q38 is control end, input and the outfan of PMOS；29th switch element Q29, the 30th switch element Q30, the 31st switch element Q31, the 34th switch element Q34, the 35th switch element Q35, the 36th Switch element Q36 and the 37th switch element Q37 is NMOS tube, and the grid of NMOS tube, drain electrode divide with source electrode It is not the 29th switch element Q29, the 30th switch element Q30, the 31st switch element Q31, the 34th switch Element Q34, the 35th switch element Q35, the 3rd sixteenmo close element Q36's and the 37th switch element Q37 Control end, input and outfan.
Further, as one embodiment of the present invention, as it is shown in fig. 7, pulse signal signal generating unit 101a includes first Not gate Y1, the second not gate Y2, the 3rd not gate Y3, the first NAND gate A1 and the 4th not gate Y4.
Wherein, the input of the first not gate Y1 and the first input end of the first NAND gate A1 connect formation pulse signal altogether and generate list The input of unit 101a, the outfan of the first not gate Y1 and the input of the second not gate Y2 connect, and the second not gate Y2's is defeated Going out end to be connected with the input of the 3rd not gate Y3, the outfan of the 3rd not gate Y3 and the second input of the first NAND gate A1 are even Connecing, the outfan of the first NAND gate A1 and the input of the 4th not gate Y4 connect, and the outfan of the 4th not gate Y4 is pulse letter The outfan of number signal generating unit 101a.
It should be noted that in the present embodiment, pulse signal signal generating unit also includes switch element Q45, this switch element The input controlling end and the outfan of the first not gate A1 and the second not gate A2 of Q45 connects altogether, this switch element Q45's Input connects altogether with outfan；Additionally, this switch element Q45 is NMOS tube, the grid of this NMOS tube, drain electrode and Source electrode is respectively control end, input and the outfan of this switch element Q45.
Further, as one embodiment of the present invention, as it is shown in fig. 7, status signal outputting unit 101b includes first Trigger M1, the second trigger M2, the second NAND gate A2, the 3rd NAND gate A3, the 4th NAND gate A4, the 5th with non- Door A5, the 6th NAND gate A6 and the 7th NAND gate A7.
Wherein, the input that clock signal terminal clk is status signal outputting unit 101b of the first trigger M1, first triggers Data signal end d of device M1, the second outfan qb of the first trigger M1, the clock signal terminal clk of the second trigger M2 And second the first input end of NAND gate A2 connect altogether, the first outfan q of the first trigger M1 is that status signal output is single First outfan of unit 101b, the reset signal end rb of the reset signal end rb and the second trigger M2 of the first trigger M1 Connect the reset terminal forming status signal outputting unit 101b altogether；Data signal end d of the second trigger M2, the second trigger The first input end of the second outfan qb of M2, the second input of the second NAND gate A2 and the 4th NAND gate A4 connects altogether, Second outfan that first outfan q is status signal outputting unit 101b of the second trigger M2；Second NAND gate A2 3rd input, the 3rd input, the 3rd input of the 4th NAND gate A4 and the 5th NAND gate of the 3rd NAND gate A3 The outfan of A5 connects altogether, and the first of the first input end of the 3rd NAND gate A3 and the second input and the second trigger M2 is defeated Going out and hold q to connect, the first outfan q of the second input of the 4th NAND gate A4 and the first trigger M1 connects, the 5th with The first input end of not gate A5 and the second input end grounding, the outfan of the second NAND gate A2 and the first of the 6th NAND gate A6 Input connects, the outfan of the 3rd NAND gate A3 and the second input of the 6th NAND gate A6 and the 7th NAND gate A7 First input end connect, the outfan of the 4th NAND gate A4 connects with the second input of the 7th NAND gate A7, the 6th and The outfan of not gate A6 and the 3rd outfan of the outfan composition status signal outputting unit 101b of the 7th NAND gate A7.
Further, as one embodiment of the present invention, as it is shown in fig. 7, state reset unit 101c includes the 8th with non- Door A8, the 9th NAND gate A9, the 5th not gate Y5, the 6th not gate Y6, the 7th not gate Y7, the 8th not gate Y8 and the 9th Not gate Y9.
Wherein, the first input end that first input end is state reset unit 101c of the 8th NAND gate A8, the 8th NAND gate Second input of A8 is second input of state reset unit 101c, the outfan of the 8th NAND gate A8 and the 5th not gate The input of Y5 connects, and the outfan of the 5th not gate Y5 and the input of the 6th not gate Y6 connect, and the 6th not gate Y6's is defeated Going out end to be connected with the input of the 7th not gate Y7, the outfan of the 7th not gate Y7 and the input of the 8th not gate Y8 connect, the The outfan of eight not gate Y8 and the first input end of the 9th NAND gate A9 connect, and the second input of the 9th NAND gate A9 is shape 3rd input of state reset unit 101c, the outfan of the 9th NAND gate A9 and the input of the 9th not gate Y9 connect, the The outfan that outfan is state reset unit 101c of nine not gate Y9.
It should be noted that in the present embodiment, state reset unit 101c also includes switch element Q46, this switch element The input controlling end and the outfan of the 6th not gate Y6 and the 7th not gate Y7 of Q46 connects altogether, this switch element Q46's Input connects altogether with outfan；Additionally, this switch element Q46 is nmos pass transistor, the grid of this nmos pass transistor, Drain electrode and source electrode are respectively control end, input and the outfan of this switch element Q46.
Further, as one embodiment of the present invention, as shown in Figure 8, drive module 102 include the tenth not gate Y10, 11st not gate Y11, the 12nd not gate Y12, the 13rd not gate Y13, the 39th switch element Q39, the 40th switch Element Q40, the 41st switch element Q41, the 4th twelvemo close element Q42, the 43rd switch element Q43, the 4th 14 switch element Q44, the 14th resistance R14, the 15th resistance R15, the 16th resistance R16 and the 17th resistance R17。
Wherein, the input composition of the input of the tenth not gate Y10 and the 12nd not gate Y12 drives the signal of module 102 defeated Entering end, the outfan of the tenth not gate Y10 and the input of the 11st not gate Y11 connect, the outfan of the 11st not gate Y11 It is connected with the control end controlling end and the 40th switch element Q40 of the 39th switch element Q39, the 39th switch The input of element Q39 receives supply voltage, the outfan of the 39th switch element Q39 and the 40th switch element Q40 Input and the control end of the 41st switch element Q41 connect altogether, the output head grounding of the 40th switch element Q40, The input of the 41st switch element Q41 and first end of the 14th resistance R14 and first end of the 15th resistance R15 Connect altogether；The outfan of the 12nd not gate Y12 and the input of the 13rd not gate Y13 connect, the output of the 13rd not gate Y13 The control end controlling end and the 43rd switch element Q43 closing element Q42 with the 4th twelvemo is held to be connected, the 42nd The input of switch element Q42 receives supply voltage, and the 4th twelvemo closes outfan and the 43rd switch unit of element Q42 The input of part Q43 and the control end of the 44th switch element Q44 connect altogether, the output of the 43rd switch element Q43 End ground connection, the input of the 44th switch element Q44 and first end of the 16th resistance R16 and the 17th resistance R17 The first end connect altogether, second end of the 14th resistance R14, second end of the 15th resistance R15, the 16th resistance R16 The second end composition of the second end and the 17th resistance R17 drives the signal output part of module 102.
It should be noted that in the present embodiment, the 39th switch element Q39 and the 4th twelvemo are closed element Q42 and are PMOS transistor, the grid of this PMOS transistor, source electrode and drain electrode are respectively the 39th switch element Q39 and the Four twelvemos close control end, input and the outfan of element Q42；Additionally, the 40th switch element Q40, the 41st Switch element Q41, the 43rd switch element Q43 and the 44th switch element Q44 are nmos pass transistor, should The grid of nmos pass transistor, drain electrode and source electrode be respectively the 40th switch element Q40, the 41st switch element Q41, 43rd switch element Q43 and control end, input and the outfan of the 44th switch element Q44.
As a example by the circuit structure shown in Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, the embodiment of the present invention is provided below The operation principle of LED colour temperature regulation control chip elaborates, and details are as follows:
Firstly, it is necessary to explanation, the detailed description that the present embodiment is to be carried out when being two based on outside constant current chip.
Further, as shown in Figure 4, low voltage detecting module 100 replaces according to the change of the output voltage of pressure filter circuit Output detects signal accordingly.Concrete, when the output voltage of outside pressure filter circuit is less than preset value, such as this is defeated Going out voltage is 10V, when preset value is 15V, and the first switch element Q1 in low voltage detecting module 100, the first resistance R1, second switch element Q2, the 3rd switch element Q3, the 4th switch element Q4, the 5th switch element Q5, the one or two pole Pipe D1, the second diode D2, the second resistance R2 and the 3rd the formed path of resistance R3, yet with the first diode The voltage of D1 and the second diode D2 is 5V, i.e. the upper voltage sum of the first diode D1 and the second diode D2 For 10V, and owing to output voltage is 10V, therefore, the control terminal voltage of the 13rd switch element Q13 is not enough to allow the 13rd Switch element Q13 turns on, the i.e. the 13rd switch element Q13 cut-off, and owing to the grid voltage of the 7th switch element Q7 is Height, therefore the 7th switch element Q7 cut-off, and then make the 7th switch element Q7, the 8th switch element Q8, the 9th switch Element Q9, the tenth switch element Q10, the 11st switch element Q11, the 4th resistance R4 and the 3rd diode D3 can not Form path, to keep the cut-off of the 13rd switch element Q13；When the 13rd switch element Q13 ends, low voltage test Module 100 exports the first detection signal to State-output module 101, and i.e. low voltage detecting module 100 output low level signal is extremely State-output module 101.
When the output voltage of outside pressure filter circuit is more than preset value, such as this output voltage is 20V, and preset value is 15V Time, the first switch element Q1 in low voltage detecting module 100, the first resistance R1, second switch element Q2, the 3rd Switch element Q3, the 4th switch element Q4, the 5th switch element Q5, the first diode D1, the second diode D2, Two resistance R2 and the 3rd the formed path of resistance R3, and due to the first diode D1 and the voltage of the second diode D2 It is 5V, i.e. the upper voltage sum of the first diode D1 and the second diode D2 is 10V, and output voltage is 20V, Therefore, the control terminal voltage of the 13rd switch element Q13 is sufficient for the 13rd switch element Q13 conducting, and due to the 7th The grid voltage of switch element Q7 is high, therefore the 7th switch element Q7 cut-off, so make the 7th switch element Q7, the Eight switch element Q8, the 9th switch element Q9, the tenth switch element Q10, the 11st switch element Q11, the 4th resistance R4 and the 3rd diode D3 can not form path, to keep the conducting of the 13rd switch element Q13；When the 13rd switch After element Q13 conducting, the 14th switch element Q14 and the 15th switch element Q15 conducting, sixteenmo closes element Q16 End with the 17th switch element Q17, and then make the 20th switch element Q20 cut-off, the 21st switch element Q21 Conducting, when, after the 21st switch element Q21 conducting, the second twelvemo closes element Q22 conducting, and exports high level signal To State-output module 101, i.e. low voltage detecting module 100 exports the second detection signal to State-output module 101.
It should be noted that the output voltage of pressure filter circuit is the most relevant with outside switching-on and switching-off state more than preset value, When outside on and off switch is opened, the output voltage of pressure filter circuit is less than preset value, and then makes low voltage detecting module 100 output the first detection signals；When outside on and off switch Guan Bi, the output voltage of pressure filter circuit is more than preset value, And then make low voltage detecting module 100 export the second detection signal, therefore, State-output module 101 receives at Preset Time To first detection signal to second detection signal saltus step transition times be on and off switch Guan Bi number of times, when on and off switch close When closing one time, the status signal of State-output module 101 output updates once, and the status signal every time exported is different；This Outward, after the signal condition of State-output module 101 self output updates preset times, State-output module 101 returns the State once, it should be noted that preset times determines according to the number of outside LED string, when outside LED When string number is n, preset times is 2n+ 1, such as, when outside LED string number is 2, preset times is 5； In addition Preset Time can need to be configured according to user.
Further, as it is shown in fig. 7, when State-output module 101 receives the first detection signal and the second detection signal, and And by first detection signal to second detection signal saltus step time, by the first not gate Y1, the second not gate in State-output module 101 Pulse signal signal generating unit 101a of Y2, the 3rd not gate Y3, the first NAND gate A1 and the 4th not gate A4 composition is to second Detection signal carries out repeatedly reverse process, and the second detection signal after reversely is carried out delay process, with output pulse signal extremely The status signal outputting unit 101b of rear end；Due to every time by the first detection signal to the second detection signal saltus step time, pulse signal Signal generating unit 101a all exports pulsatile once signal, and therefore, status signal outputting unit 101b can be according to the pulse letter received Number number of times export corresponding status signal.
The transition times that table 1 is the first detection signal when the second detection signal saltus step and trigger M1, trigger M2 defeated Go out signal correspondence table.Concrete, as shown in table 1, when status signal outputting unit 101b return pulse signal for the first time, i.e. First detection signal is for the first time when the second detection signal saltus step, and each of the first trigger M1 and the second trigger M2 exports The output signal of end is state 1；When status signal outputting unit 101b second time return pulse signal, the i.e. first detection signal the Secondary is when the second detection signal saltus step, and the output signal of each outfan of the first trigger M1 and the second trigger M2 is State 2；When status signal outputting unit 101b third time return pulse signal, the i.e. first detection signal third time is to the second detection During signal saltus step, the output signal of each outfan of the first trigger M1 and the second trigger M2 is state 3；Work as state The 4th return pulse signal of signal output unit 101b, the i.e. first detection signal the 4th time when the second detection signal saltus step, The output signal of each outfan of the first trigger M1 and the second trigger M2 is state 4.
q(M1) qb(M1) q(M2) qb(M2)
State 1 0 1 0 1
State 2 1 0 0 1
State 3 0 1 1 0
State 4 1 0 1 0
Table 1
Further, table 2 shows the signal and first driving the outfan P1 in module 102 and outfan P2 to be exported The corresponding table of the output signal of trigger M1 and the second trigger M2.As shown in table 2, so that LED to have two LED As a example by lamp string, when the output signal of the first trigger M1 and the second trigger M2 is state 1, i.e. on and off switch closes for the first time During conjunction, driving the outfan P1 in module 102 and outfan P2 equal output low level signal, i.e. drive in module 102 is defeated Go out to hold P1 and outfan P2 all to export 0, and then the first constant current chip and the second constant current chip are not worked, right to realize The first time colour temperature regulation of LED；When the output signal of the first trigger M1 and the second trigger M2 is state 2, work as electricity Source switch second time Guan Bi constantly, drives the outfan P1 output low level signal in module 102, the high electricity of outfan P2 output Ordinary mail number, i.e. drives the outfan P1 in module 102 to be output as 0, and outfan P2 is output as 1, and then makes the first constant current Chip does not works, the second constant current chip work, to realize the regulation of the second time colour temperature to LED；As the first trigger M1 It is state 3 with the output signal of the second trigger M2, when on and off switch third time Guan Bi, drives the output in module 102 End P1 exports high level signal, outfan P2 output low level signal, i.e. drives the outfan P1 in module 102 to be output as 1, outfan P2 are output as 0, and then make the first constant current chip work, and the second constant current chip does not works, to realize LED The third time colour temperature regulation of lamp；When the output signal of the first trigger M1 and the second trigger M2 is state 4, when power supply is opened When closing the 4th Guan Bi, drive outfan P1 and the outfan P2 in module 102 all to export high level signal, i.e. drive module Outfan P1 in 102 and outfan P2 is all output as 1, and then the first constant current chip and the second constant current chip are all worked, To realize the 4th the colour temperature regulation to LED；When the 5th Guan Bi of on and off switch, State-output module 101 returns to Primary state, its work process is identical with during on and off switch Guan Bi for the first time, and here is omitted.
q(M1) qb(M1) q(M2) qb(M2) P1 P2
0 1 0 1 0 0
1 0 0 1 0 1
0 1 1 0 1 0
1 0 1 0 1 1
Table 2
Further, as shown in figs. 5 and 6, when pressure filter circuit has voltage to export, and State-output module 101 exists First detection signal transition times when the second detection signal saltus step reaches 2nWhen+1, the 24th switch element Q24 cut-off, The output voltage VCC of pressure filter circuit exports to the second sixteenmo pass element through the 7th resistance R7 and the 8th resistance R8 The grid of Q26, the second sixteenmo closes element Q26 conducting, and then changes output voltage VCC to export reset running voltage VDD is to reseting controling signal signal generating unit 103b；After reseting controling signal signal generating unit 103b receives this reset running voltage, Second eighteenmo closes element Q28 cut-off, and this reset running voltage VDD is via the tenth resistance R10, the 11st resistance R11 The grid to the 29th switch element Q29 and the grid of the 30th switch element Q30 is exported with the 12nd resistance R12, with Make the 29th switch element Q29 and the 30th switch element Q30 conducting；And this reset running voltage VDD is via the tenth The grid of three resistance R13 outputs to the 31st switch element Q31 and the grid of thirty-twomo pass element Q32, and due to 30th switch element Q30 conducting, therefore, the 30th switch element Q30 is by the grid electricity of the 31st switch element Q31 The grid voltage with thirty-twomo pass element Q32 is pressed to drag down so that the 31st switch element Q31 conducting, the 32nd Switch element Q32 ends, and then makes the 33rd switch element Q33 cut-off, the 34th switch element Q34 and the 3rd 15 switch element Q35 conductings so that the 3rd sixteenmo closes element Q36 and the 37th switch element Q37 and is turned off, the Three eighteenmos close element Q38 conducting, so that the outfan output high level signal of reseting controling signal signal generating unit 103b To the 9th NAND gate A9 of State-output module 101, so that State-output module 101 is according to this high level signal and the first inspection Survey signal transition times when the second detection signal saltus step and reach 2nThe first trigger M1 and the second trigger M2 is made when+1 Output signal self output state is carried out reset processing, i.e. the saltus step when the first detection signal is to the second detection signal saltus step Number of times reaches 2nWhen+1, State-output module 101 controls the first trigger M1 and the second trigger according to this high level signal The output signal of M2 returns state 1.
Concrete, when the State-output module 101 transition times when the first detection signal is to the second detection signal saltus step reaches 2nWhen+1, the output signal of the first trigger M1 and the second trigger M2 is maintained at state 4, the i.e. the 8th NAND gate A8 It is 1 and 1 that first input end and the second input receive signal, and the outfan of now reseting controling signal signal generating unit 103b Output high level signal receives to the 9th NAND gate A9 of State-output module 101, the second input of the i.e. the 9th NAND gate A9 Signal be 1, now, the output end signal 0 of the 8th NAND gate A8 through the 5th not gate Y5, the 6th not gate Y6, the 7th The first input end of not gate Y7 and the 8th not gate Y8 output 0 to the 9th NAND gate A9, and then make the 9th NAND gate A9 Output signal 1 is to the input of the 9th not gate Y9, so that the outfan output signal 0 to the first of the 9th not gate Y9 is touched Send out the reset signal end rd of the reset signal end rd and the second trigger M2 of device M1, to realize the output of the first trigger M1 Signal resets and the output signal of the second trigger M2 resets.
Additionally, when pressure filter circuit Non voltage output, and during the charging capacitor discharge off of pressure filter circuit, the 24th Switch element Q24 turns on, and the output voltage VCC of pressure filter circuit exports extremely through the 7th resistance R7 and the 8th resistance R8 Second sixteenmo closes the grid of element Q26, and the second sixteenmo closes element Q26 cut-off, and then makes the second sixteenmo close element Reset running voltage VDD of Q26 output low level is to reseting controling signal signal generating unit 103b；When reseting controling signal generates After unit 103b receives this low level reset running voltage VDD, the second eighteenmo closes element Q28 cut-off, and this is multiple Position running voltage VDD is opened to the 29th via the tenth resistance R10, the 11st resistance R11 and the 12nd resistance R12 output Close grid and the grid of the 30th switch element Q30 of element Q29, so that the 29th switch element Q29 and the 30th opens Close element Q30 cut-off；And this reset running voltage VDD exports to the 31st switch element via the 13rd resistance R13 The grid of Q31 and thirty-twomo close the grid of element Q32, and due to the 30th switch element Q30 cut-off so that the 3rd 11 switch element Q31 conductings, thirty-twomo closes element Q32 cut-off, and then the 33rd switch element Q33 is led Logical, the 34th switch element Q34 and the 35th switch element Q35 ends so that the 3rd sixteenmo close element Q36 and 37th switch element Q37 is turned off, and the 3rd eighteenmo closes element Q38 conducting, so that reseting controling signal generates The outfan output low level signal of unit 103b is to the 9th NAND gate A9 of State-output module 101, the i.e. the 9th NAND gate The signal that second input of A9 receives is 0.And when the signal that the second input of the 9th NAND gate A9 receives is 0, no The output signal of pipe the first trigger M1 and the second trigger 2 is state 1, state 2 or state 3, the 9th not gate Y9's The reset signal end rd of the reset signal end rd and the second trigger M2 of outfan output signal 0 to the first trigger M1, with The output signal realizing the first trigger M1 resets and the output signal reset of the second trigger M2.
It should be noted that in the present embodiment, owing to the supply voltage of reseting controling signal signal generating unit 103b is by powering The charging capacitor of the output voltage of unit 103a and pressure filter circuit provides, and the output voltage of power supply unit 103 with point The voltage of filter pressing wave circuit is relevant, and the output voltage of pressure filter circuit is relevant with supply voltage again, therefore, when on and off switch breaks Open, and when exceeding the discharge off time of charging capacitor turn-off time, it is multiple that reseting controling signal signal generating unit 103b sends state Position signal is to State-output module 101, so that State-output module 101 carries out state reset according to this filling reset signal；This Outward, Preset Time is equal to the discharge off time of charging capacitor.
In the present invention, include low voltage detecting module 100, State-output module 101 by employing and drive module 102 LED colour temperature regulation control chip 10 so that low pressure detection module 100 is corresponding according to the change output of the output voltage received Detection signal, and when output voltage less than preset value time, it is defeated to state that low voltage detecting module 100 exports the first detection signal Going out module 101, when output voltage is more than preset value, low voltage detecting module 100 exports the second detection signal to State-output Module 101；State-output module 101 is secondary to the saltus step of the second detection signal saltus step according to the first detection signal in Preset Time Number exports corresponding status signal and extremely drives module 102, so that driving module 102 to drive multiple constant current chips according to status signal, To realize the control to multiple constant current chips, and then make to include the LED colour temperature regulation of above-mentioned LED colour temperature regulation control chip Control circuit realizes the colour temperature to LED string and regulates, and owing to decreasing noise suppression module, therefore, the embodiment of the present invention carries LED colour temperature the regulation simple in construction of control chip 10, the low cost of confession.
Further, Fig. 9 shows the circuit structure of the LED colour temperature adjusting control circuit that one embodiment of the invention provided, For convenience of description, only illustrating the part relevant to the embodiment of the present invention, details are as follows:
In the present embodiment, this LED colour temperature adjusting control circuit 30 include rectification circuit 300, pressure filter circuit 301, Multiple constant current chips, multiple LED string and above-mentioned LED colour temperature regulation control chip 10, and pressure filter circuit The voltage of 301 pairs of external power sources exports after carrying out divider filter and regulates control chip 10 to LED colour temperature, and rectification circuit 300 is right The output voltage of external power source carries out rectification process, and a constant current chip drives a LED string；It should be noted that In the present embodiment, the number of constant current chip and LED string is all as a example by two, i.e. LED colour temperature adjusting control circuit 30 wraps Include the first constant current chip the 302, second constant current chip the 303, first LED string 304 and the second LED string 305.
Concrete, the input of rectification circuit 300 is connected with outside alternating current power supply, the outfan of rectification circuit 300 and dividing potential drop The voltage input end of filter circuit the first constant current chip 302, the voltage input end of the second constant current chip 303, the first LED The anode of string 304 and the anode of the second LED string 305 connect altogether, the input of pressure filter circuit 301 and outside friendship Stream power supply connects, and the outfan of pressure filter circuit 301 connects with the voltage input end vcc of LED colour temperature regulation control chip 10 Connect, pressure filter circuit, the first signal output part d1 of LED colour temperature regulation control chip 10 and the first constant current chip 302 Voltage input end vcc connect, the LED colour temperature regulation secondary signal outfan d2 of control chip 10 and the second constant current chip The voltage input end vcc of 303 connects, the earth terminal gnd ground connection of LED colour temperature regulation control chip 10, the first constant current chip The first outfan dr of 302 and the negative terminal of the first LED string 304 connect, the first outfan dr of the second constant current chip 303 Being connected with the negative terminal of the second LED string 305, the first outfan dr of the first constant current chip 302 and the second outfan produce cs Being connected to ground altogether, the first outfan dr and the second outfan cs of the second constant current chip 303 are connected to ground altogether.
It should be noted that in the present embodiment, pressure filter circuit 301 is by diode D, resistance R18 and resistance R19 And charging capacitor C2 composition, the anode of diode D is the input of pressure filter circuit 301, the negative electrode of diode D with First end of resistance R18 connects, and second end of resistance R18 is connected with first end of resistance R19, second end of resistance R19 The outfan forming pressure filter circuit 301, the second end ground connection of charging capacitor C2 is connect altogether with first end of charging capacitor C2； Additionally, in the present embodiment, the first LED string 304 includes that diode D7, the negative electrode of diode D7 are respectively with anode The negative terminal of the first LED string 304 and anode, the second LED string 305 includes diode D8, the negative electrode of diode D8 with Anode is respectively anode and the negative terminal of the second LED string 305；First LED string 304 and the 2nd LED in other embodiments Lamp string 305 all includes but not limited to a diode, and can use between multiple diode and be connected in series, it would however also be possible to employ It is connected in parallel.
Further, the embodiment of the present invention provide LED colour temperature adjusting control circuit 30 also include resistance R20, resistance R21, Resistance R22, resistance R23, resistance R24, resistance R25, resistance R26, resistance R27, electric capacity C1, electric capacity C3, electricity Hold C4, electric capacity C5, electric capacity C6, diode D5, diode D6, inductance L1, inductance L2, switching tube M3 and open Close pipe M4.
Wherein, first end of electric capacity C1 is connected with the outfan of rectification circuit 300, the second end ground connection of electric capacity C1, resistance First end of first end of R20, the negative electrode of diode D5, first end of electric capacity C5 and resistance R23 is connected to rectified current altogether The outfan on road 300, second end of resistance R20 is connected with first end of resistance R21, second end of resistance R21 and electric capacity First end of C3 is connected to the voltage input end vcc of the first constant current chip 302 altogether, second end of electric capacity C3 and the first constant current chip The earth terminal of 302 is connected to ground altogether, and the anode of diode D5 connects altogether with the input of switching tube M3, first end of inductance L1, Second end of inductance L1 connects altogether with the second end of second end of electric capacity C5 and resistance R23, the control end of switching tube M3 with First outfan dr of the first constant current chip 302 connects, the outfan of switching tube M3 and the second of the first constant current chip 302 defeated The first end going out end and resistance R22 connects altogether, the second end ground connection of resistance R22.
Additionally, first end of first end of resistance R24, the negative electrode of diode D6, electric capacity C6 and the first of resistance R27 End is connected to the outfan of rectification circuit 300 altogether, and second end of resistance R24 is connected with first end of resistance R25, resistance R25 First end of the second end and electric capacity C4 be connected to second end of voltage input end vcc, electric capacity C4 of the second constant current chip 303 altogether Ground, the anode of diode D6 and the input of switching tube M4, inductance L2 it is connected to altogether with the earth terminal of the second constant current chip 303 The first end connect altogether, second end of inductance L2 connects altogether with the second end of second end of electric capacity C6 and resistance R27, switching tube The first outfan dr controlling end and the second constant current chip 303 of M4 connects, the outfan of switching tube M4 and the second constant current core Second outfan of sheet 303 and first end of resistance R26 connect altogether, the second end ground connection of resistance R26.
Concrete, when on and off switch Guan Bi for the first time, the output voltage of pressure filter circuit 301 passes through resistance R20 and resistance R21 exports the voltage input end vcc to the first constant current chip 302, and is exported to second by resistance R24 and resistance R25 The voltage input end vcc of constant current chip 303；And when on and off switch Guan Bi for the first time, LED colour temperature regulation control chip 10 By the voltage of the voltage input end vcc of the first constant current chip 302 and the voltage of the voltage input end vcc of the second constant current chip 303 All drag down, and then the first constant current chip 302 is not worked with the second constant current chip 303, switching tube M3 and switching tube M4 is turned off, so that the first LED string 304 and the second LED string 305 all do not have path, the first LED string 304 equal second LED strings 305 are the most luminous, thus realize the first time colour temperature to LED and regulate.
When on and off switch second time Guan Bi, the output voltage of pressure filter circuit 301 is defeated with resistance R21 by resistance R20 Go out the voltage input end vcc to the first constant current chip 302, and exported to the second constant current core by resistance R24 and resistance R25 The voltage input end vcc of sheet 303；And when on and off switch second time Guan Bi, LED colour temperature regulation control chip 10 is by the The voltage pull-down of the voltage input end vcc of one constant current chip 302, and then the first constant current chip 303 is not worked, switching tube M3 ends, and the first LED string 304 does not has path, and the i.e. first LED string 304 is the most luminous；Additionally, LED colour temperature is adjusted Joint control chip 10 keeps the high voltage of the voltage input end vcc of the second constant current chip 303, and then makes the second constant current chip 303 work, switching tube M4 turns on, so that the second LED string 305 can pass through the first inductance L2, switching tube M4 Forming path, the second LED string 305 is luminous, thus realizes the second time colour temperature to LED and regulate.
When on and off switch third time Guan Bi, the output voltage of pressure filter circuit 301 is defeated with resistance R21 by resistance R20 Go out the voltage input end vcc to the first constant current chip 302, and exported to the second constant current core by resistance R24 and resistance R25 The voltage input end vcc of sheet 303；And when on and off switch third time Guan Bi, LED colour temperature regulation control chip 10 is by the The voltage pull-down of the voltage input end vcc of two constant current chips 303, and then the second constant current chip 303 is not worked, switching tube M4 ends, and the second LED string 305 does not has path, and the i.e. second LED string 305 is the most luminous；Additionally, LED colour temperature is adjusted Joint control chip 10 keeps the high voltage of the voltage input end vcc of the first constant current chip 302, and then makes the first constant current chip 302 work, switching tube M3 turns on, so that the first LED string 304 can pass through the first inductance L1, switching tube M3 Forming path, the first LED string 304 is luminous, thus realizes the third time colour temperature to LED and regulate.
When the 4th Guan Bi of on and off switch, the output voltage of pressure filter circuit 301 is defeated with resistance R21 by resistance R20 Go out the voltage input end vcc to the first constant current chip 302, and exported to the second constant current core by resistance R24 and resistance R25 The voltage input end vcc of sheet 303；And when the 4th Guan Bi of on and off switch, LED colour temperature regulation control chip 10 keeps The voltage input end vcc high voltage with the second constant current chip 303 of the voltage input end vcc of the first constant current chip 302, and then First constant current chip 302 is all worked with the second constant current chip 303, and switching tube M3 and switching tube M4 turns on, so that Obtaining the first LED string 304 and can form path by the first inductance L1, switching tube M3, the second LED string 305 passes through Inductance L2, switching tube M4 form path, and the first LED string 304 and the second LED string 305 are the most luminous, thus realize The 4th the colour temperature regulation to LED；Due to the work of LED colour temperature adjusting control circuit 30 during the 5th Guan Bi of on and off switch Make process identical with work process during on and off switch Guan Bi for the first time, therefore, LED colour temperature during the 5th Guan Bi of on and off switch The work process of adjusting control circuit 30 refers to work process during on and off switch Guan Bi for the first time, and here is omitted.
It should be noted that the pressure filter circuit 301 of the LED colour temperature adjusting control circuit 30 provided due to the present embodiment In resistance 19 and charging capacitor C2 define filter circuit and enter with the voltage to input to LED colour temperature regulation control chip 10 Row Filtering Processing, therefore, without arranging noise suppression module in LED colour temperature regulation control chip 10, and makes LED color Temperature regulation control chip 10 is become four pins from five pins, reduces the area of chip simultaneously, and saves being packaged into of chip This, and then the cost of the LED colour temperature adjusting control circuit 30 reduced.
Further, the embodiment of the present invention additionally provides a kind of LED, and this LED includes above-mentioned LED colour temperature regulation Control circuit 30.
In embodiments of the present invention, by employing include low voltage detecting module 100 LED colour temperature regulation control chip 10, Rectification circuit 300, divider filter resistance the 301, first constant current chip the 302, second constant current chip the 303, first LED string 304 and the second LED colour temperature adjusting control circuit 30 of LED string 305 so that LED colour temperature regulation control chip 10 The Guan Bi number of times different driving signal of output according to external power source, to the first constant current chip 302 and the second constant current chip 303, enters And make the first constant current chip 302 control the first LED string 304 from the second constant current chip 303 according to different driving signals And second light on and off of LED string 305, thus realize the colour temperature to LED and regulate, and due to, LED colour temperature regulates Control chip 10 decreases noise suppression module so that its simple in construction, volume be little and low cost, and then makes LED color The temperature simple in construction of adjusting control circuit 30, volume be little and low cost, solves existing LED colour temperature adjusting control circuit and deposits In the problem that volume is big and cost is high.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all spirit in the present invention and former Any amendment, equivalent and the improvement etc. made within then, should be included within the scope of the present invention.

Claims (10)

1. a LED colour temperature regulation control chip, in order to drive multiple constant current chip that multiple LED strings are carried out colour temperature tune Joint, it is characterised in that described LED colour temperature regulation control chip includes low voltage detecting module, State-output module and drives Dynamic model block；
The output voltage of the pressure filter circuit outside voltage input end reception of described low voltage detecting module, described low-voltage is examined The signal output part surveying module is connected with the signal input part of described State-output module, the signal output of described State-output module End is connected with the signal input part of described driving module, and the signal output part of described driving module is with multiple described constant current chips even Connect；
Described low voltage detecting module detects signal accordingly according to the change alternately output of described output voltage, when described output electricity When pressure is less than preset value, described low voltage detecting module output the first detection signal is to described State-output module；When described output When voltage is more than preset value, described low voltage detecting module output the second detection signal is to described State-output module；Described state Output module exports phase according to described first detection signal to the transition times of described second detection signal saltus step in Preset Time The status signal answered is to described driving module；Described driving module drives multiple described constant current chips according to described status signal.
LED colour temperature the most according to claim 1 regulation control chip, it is characterised in that described LED colour temperature regulation control Coremaking sheet also includes reset control module, and the voltage input end of described reset control module receives the output of described pressure filter circuit Voltage, the signal output part of described reset control module is connected with the reseting controling end of described State-output module；
When described pressure filter circuit has voltage to export, and described State-output module detects signal to described the described first When the transition times of two detection signal saltus steps reaches preset times, described reset control module is according to described output voltage output state Reseting controling signal makes described State-output module carry out output state reset processing；When described pressure filter circuit no-voltage is defeated Go out, and during the charging capacitor discharge off of described pressure filter circuit, described reset control module output state reseting controling signal Described State-output module is made to carry out output state reset processing.
LED colour temperature the most according to claim 2 regulation control chip, it is characterised in that described State-output module bag Include pulse signal signal generating unit, status signal outputting unit and state reset unit；
The input of described pulse signal signal generating unit is the signal input part of described State-output module, and described pulse signal generates The outfan of unit is connected with the input of described status signal outputting unit, the first outfan of described status signal outputting unit Being connected with the first input end of described state reset unit, the second outfan of described status signal outputting unit is multiple with described state Second input of bit location connects, and the reset that the 3rd input is described State-output module of described state reset unit controls End, the outfan of described state reset unit is connected with the reset terminal of described status signal outputting unit, and described status signal exports The signal output part that 3rd outfan is described State-output module of unit；
When described first detects signal to described second detection signal saltus step, described pulse signal signal generating unit is according to described second Detection signal generates pulse signal；Described status signal outputting unit is according to the number of times of the described pulse signal generated in Preset Time Export corresponding status signal；The state reset control signal pair that described state reset unit exports according to described reset control module The output state of described State-output module carries out reset processing.
LED colour temperature the most according to claim 3 regulation control chip, it is characterised in that described pulse signal generates single Unit includes the first not gate, the second not gate, the 3rd not gate, the first NAND gate and the 4th not gate；
The input of described first not gate and the first input end of described first NAND gate connect the described pulse signal of formation altogether and generate single The input of unit, the outfan of described first not gate is connected with the input of described second not gate, the outfan of described second not gate Being connected with the input of described 3rd not gate, the outfan of described 3rd not gate connects with the second input of described first NAND gate Connecing, the outfan of described first NAND gate is connected with the input of described 4th not gate, and the outfan of described 4th not gate is described The outfan of pulse signal signal generating unit.
LED colour temperature the most according to claim 3 regulation control chip, it is characterised in that the output of described status signal is single Unit include the first trigger, the second trigger, the second NAND gate, the 3rd NAND gate, the 4th NAND gate, the 5th NAND gate, Six NAND gate and the 7th NAND gate；
The input that clock signal terminal is described status signal outputting unit of described first trigger, the number of described first trigger According to signal end, the second outfan of described first trigger, the clock signal terminal of described second trigger and described second with non- The first input end of door connects altogether, the first outfan is described status signal outputting unit first output of described first trigger End, it is defeated that the reset signal end of described first trigger connects the described status signal of formation altogether with the reset signal end of described second trigger Go out the reset terminal of unit；The data signal end of described second trigger, the second outfan of described second trigger, described second Second input of NAND gate and the first input end of described 4th NAND gate connect altogether, the first outfan of described second trigger The second outfan for described status signal outputting unit；3rd input of described second NAND gate, described 3rd NAND gate 3rd input, described 3rd input of the 4th NAND gate and the outfan of described 5th NAND gate connect altogether, the described 3rd with First input end and second input of not gate are connected with the first outfan of described second trigger, described 4th NAND gate Second input is connected with the first outfan of described first trigger, the first input end of described 5th NAND gate and the second input End ground connection, the outfan of described second NAND gate is connected with the first input end of described 6th NAND gate, described 3rd NAND gate Outfan is connected with the second input of described 6th NAND gate and the first input end of described 7th NAND gate, the described 4th with The outfan of not gate is connected with the second input of described 7th NAND gate, the outfan of described 6th NAND gate with the described 7th with The outfan of not gate forms the 3rd outfan of described status signal outputting unit.
LED colour temperature the most according to claim 3 regulation control chip, it is characterised in that described state reset unit bag Include the 8th NAND gate, the 9th NAND gate, the 5th not gate, the 6th not gate, the 7th not gate, the 8th not gate and the 9th not gate；
The first input end that first input end is described state reset unit of described 8th NAND gate, the of described 8th NAND gate Two inputs are the second input of described state reset unit, and the outfan of described 8th NAND gate is defeated with described 5th not gate Enter end connect, the outfan of described 5th not gate is connected with the input of described 6th not gate, the outfan of described 6th not gate and The input of described 7th not gate connects, and the outfan of described 7th not gate is connected with the input of described 8th not gate, and described the The outfan of eight not gates is connected with the first input end of described 9th NAND gate, and the second input of described 9th NAND gate is described 3rd input of state reset unit, the outfan of described 9th NAND gate is connected with the input of described 9th not gate, described The outfan of the 9th not gate is the outfan of described state reset unit.
7. regulate control chip according to the LED colour temperature described in any one of claim 1-6, it is characterised in that described driving mould Block includes the tenth not gate, the 11st not gate, the 12nd not gate, the 13rd not gate, the 39th switch element, the 40th switch Element, the 41st switch element, the 4th twelvemo close element, the 43rd switch element, the 44th switch element, the 14 resistance, the 15th resistance, the 16th resistance and the 17th resistance；
The input of the input of described tenth not gate and described 12nd not gate forms the signal input part of described driving module, institute The input of the outfan and described 11st not gate of stating the tenth not gate is connected, the outfan and the described 3rd of described 11st not gate The control end controlling end and described 40th switch element of 19 switch elements connects, described 39th switch element defeated Enter end and receive supply voltage, the outfan of described 39th switch element and the input of described 40th switch element and institute The control end stating the 41st switch element connects altogether, the output head grounding of described 40th switch element, described 41st switch The input of element connects altogether with the first end of described 14th resistance and the first end of described 15th resistance；Described 12nd non- The outfan of door is connected with the input of described 13rd not gate, and the outfan of described 13rd not gate closes with described 4th twelvemo The control end controlling end and described 43rd switch element of element connects, and described 4th twelvemo closes the input termination of element Receiving described supply voltage, described 4th twelvemo closes the outfan of element and the input of described 43rd switch element and institute The control end stating the 44th switch element connects altogether, the output head grounding of described 43rd switch element, and the described 44th opens The input closing element connects altogether with the first end of described 16th resistance and the first end of described 17th resistance, and the described 14th Second end of resistance, the second end of described 15th resistance, the second end of described 16th resistance and described 17th resistance Second end forms the signal output part of described driving module.
LED colour temperature the most according to claim 1 regulation control chip, it is characterised in that described low voltage detecting module Including control unit and detection signal signal generating unit；
The input of described control unit connects the described low voltage test mould of formation altogether with the input of described detection signal signal generating unit The voltage input end of block, the outfan of described control unit is connected with the control end of described detection signal signal generating unit, described detection The outfan of signal signal generating unit is the signal output part of described low voltage detecting module；
The output voltage of described pressure filter circuit is detected by described control unit, and output controls signal to described accordingly Detection signal signal generating unit, described detection signal signal generating unit generates corresponding described detection signal according to described control signal.
9. a LED colour temperature adjusting control circuit, it is characterised in that described LED colour temperature adjusting control circuit includes rectified current Road, pressure filter circuit, multiple constant current chip, multiple LED string and the LED as described in any one of claim 1-8 Colour temperature regulation control chip；
After the voltage that external power source is exported by described pressure filter circuit carries out divider filter, output is controlled to the regulation of described LED colour temperature Coremaking sheet, described rectification circuit carries out rectification process to the output voltage of described external power source, and a described constant current chip drives one Individual described LED string.
10. a LED, it is characterised in that described LED includes LED colour temperature as claimed in claim 9 regulation control Circuit processed.
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