CN102740572A - Driving power supply control circuit - Google Patents
Driving power supply control circuit Download PDFInfo
- Publication number
- CN102740572A CN102740572A CN2012102504009A CN201210250400A CN102740572A CN 102740572 A CN102740572 A CN 102740572A CN 2012102504009 A CN2012102504009 A CN 2012102504009A CN 201210250400 A CN201210250400 A CN 201210250400A CN 102740572 A CN102740572 A CN 102740572A
- Authority
- CN
- China
- Prior art keywords
- circuit
- resistance
- control circuit
- control
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000004065 semiconductor Substances 0.000 claims description 25
- 238000007689 inspection Methods 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 13
- 238000001914 filtration Methods 0.000 claims description 11
- 230000001131 transforming effect Effects 0.000 claims description 10
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 239000000463 material Substances 0.000 abstract description 7
- 238000005070 sampling Methods 0.000 abstract description 5
- 230000009466 transformation Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 43
- 238000000034 method Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000005286 illumination Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010793 electronic waste Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Abstract
The invention discloses a driving power supply control circuit. The driving power supply control circuit comprises a rectifier filter circuit, a DC/DC (Direct Current to Direct Current) transformation circuit, a switching control circuit, a feedback control circuit and a secondary output rectifier circuit. The feedback control circuit is connected between the secondary output rectifier circuit and the switching control circuit; the voltage sampling end of the feedback control circuit is connected with a singlechip control circuit; the singlechip control circuit is used for generating a control signal PWM1 to control a feedback voltage output of the feedback control circuit; and the singlechip control circuit can also be used for generating a load current control signal PWM2 for a load current control circuit to regulate the average of an output current cycle. According to the driving power supply control circuit provided by the invention, the mass production of a manufacturer can be ensured, the matching can be implemented only by carrying out program updating on a singlechip chip for different LED (Light-Emitting Diode) loads, the manpower and material cost is reduced, the production efficiency is improved and the supply quality is also ensured.
Description
Technical field
The present invention relates to the LED lighting technical field, be specifically related to a kind of driving power control circuit that can control the LED load.
Background technology
The string of current LED light pack module is also of a great variety, and is also quite various to the current/voltage requirement of driving power, and this manufacturer that gives specialty supply driving power is in design, and production causes very big pressure in the supply of material.Often the LED of specialty illumination manufacturing firm requires short, adaptable and fast to the friendship phase of driving power; Because eight of LED load strings parallel way five methods of each LED illumination manufacturing firm; The electric current and voltage of driving power also will be followed the variation of LED module and changed; And driving power will have a relative process (needing reliability demonstration) from being designed into production; So a large amount of stocks can not be in the driver manufacturer of specialty, current phenomenon is: the manpower and materials of driving power manufacturer labor are carried out prefabricated to the parameter of driving power, and production shipment then hastily starts; There is bigger hidden danger in the LED driving power that so quick response is produced on supply of material quality; And, mate the supply current parameter that assembling all will be revised driving power before because there are situation incompatible, can not be shared in the driving power that each manufacturer production is come out and the LED module of other producers, can cause the very big manpower and the waste of material resources like this; Simultaneously also can produce a large amount of electronic wastes, the environmental protection concept that this and LED throw light on is disagreed.
Summary of the invention
The present invention provides a kind of driving power control circuit, can need not hardware is changed the general coupling that just can realize multiple LED module, has solved the problems referred to above effectively.
The present invention provides a kind of driving power control circuit, comprises current rectifying and wave filtering circuit, DC/DC transforming circuit, ON-OFF control circuit, feedback control circuit and secondary output rectification circuit; Current rectifying and wave filtering circuit; DC/DC transforming circuit and secondary output rectification circuit connect successively; The voltage output of ON-OFF control circuit control DC/DC transforming circuit; Feedback control circuit is connected between secondary output rectification circuit and the ON-OFF control circuit, and the voltage sample end of feedback control circuit connects a single chip machine controlling circuit, and said single chip machine controlling circuit is used to produce the feedback voltage output of a control signal PWM1 Control and Feedback control circuit.
Preferably; Also be connected a software between single chip machine controlling circuit and the feedback control circuit and rewrite output voltage controlling circuit; Said software is rewritten output voltage controlling circuit and is comprised first filter circuit that said control signal PWM1 is carried out filtering, resistance R 67, operational amplifier U6A; Resistance R 66, diode D12 and resistance R 69; First filter circuit exports the positive input of operational amplifier U6A to; Be connected resistance R 66 between the reverse input end of operational amplifier U6A and the output; Resistance R 67 is connected between operational amplifier and the ground, and the series arm that the output of operational amplifier U6A constitutes through diode D12 and resistance R 69 is connected to the voltage sample end of feedback control circuit.
Preferably; Also comprise load current control circuit; Said load current control circuit has switch passage and control end; Its switch passage is connected between load negative terminal LED-and the earth terminal, and its control end is connected in single chip machine controlling circuit, said single chip machine controlling circuit produce a load current control signal PWM2 be used for control load circuit control circuit the switch passage conducting with end.
Preferably, said load current control circuit comprises metal-oxide-semiconductor Q4, resistance R 60, and the grid of metal-oxide-semiconductor is the control end of load circuit control circuit, and the drain electrode of metal-oxide-semiconductor connects load negative terminal LED-, and the source electrode of metal-oxide-semiconductor connects earth terminal through resistance R 60.
Preferably; Comprise that also drive signal acceleration promotes circuit; Said drive signal is quickened to promote circuit and is comprised driving voltage source and driving switch; Said driving power links to each other with the control end of metal-oxide-semiconductor Q4 through the switch passage of driving switch, and the control end of said driving switch is connected in the load current control signal PWM2 output of single chip machine controlling circuit.
Preferably, the control end of metal-oxide-semiconductor Q4 also is connected with a bleeder resistance.
Preferably, said driving switch comprises resistance R 58, resistance R 62; NPN type triode Q6, positive-negative-positive triode Q5, resistance R 55; Resistance R 56, resistance R 59, wherein; It is that NPN type triode Q6 provides base bias voltage that resistance R 58 constitutes the bias pressure circuit with resistance R 62, and it is that positive-negative-positive triode Q5 provides base bias voltage that resistance R 55 constitutes the bias pressure circuit with resistance R 56, the emitter of NPN type triode Q6 and resistance R 62 equal ground connection; The collector electrode of NPN type triode Q6 is connected to the base stage of positive-negative-positive triode Q5 through resistance R 56; Resistance R 55 all connects driving power with the emitter of positive-negative-positive triode Q5, and the collector electrode of positive-negative-positive triode Q5 is connected to the control end of load current control circuit through resistance R 59, and resistance R 58 is connected in the load current control signal PWM2 output of single chip machine controlling circuit.
Preferably; Be serially connected with an inspection leakage resistance on the switch passage of load current control circuit, the anode of inspection leakage resistance is connected with current foldback circuit, and said current foldback circuit comprises comparison circuit and control switch; One input of comparison circuit connects voltage reference; The anode of another input termination inspection leakage resistance of comparison circuit, the control end of the output termination control switch of comparison circuit, the switch passage of control switch are connected between the control end and earth terminal of load current control circuit; The positive terminal voltage of inspection leakage resistance is during greater than voltage reference, the switch passage conducting of comparison circuit control control switch.
Preferably, said comparison circuit comprises comparator U6B, diode D13, resistance R 63 and capacitor C 35; The anode of diode D13 connects the output of comparator U6B; The negative electrode of diode D13 connects the positive input of comparator U6B; The positive input of comparator U6B is connected to the anode of examining leakage resistance through resistance R 63, and the positive input of comparator U6B is through capacitor C 35 ground connection; Said control switch is triode Q7, and the output of comparator U6B connects the base stage of triode Q7, and the collector electrode of triode Q7 connects the control end of load current control circuit, the grounded emitter of triode Q7.
Preferably, said voltage reference is made up of with the dividing potential drop of connecting of resistance 64 through a resistance R 57 a 5V voltage source, resistance R 64 ground connection, and resistance R 57 connects the 5V voltage source.
Technique scheme can be found out; Because the embodiment of the invention is employed in the sampling end of feedback control circuit and inserts single chip machine controlling circuit; When load is supplied power to different LED; Only need carry out program to the singlechip chip of single chip machine controlling circuit writes renewal; Single chip machine controlling circuit output Different control signal PWM2 can be regulated the feedback output of feedback control circuit, thereby further the ON-OFF control circuit of driving power primary side is controlled, make the output of whole driving power can mate new LED load.Therefore; The driving power control circuit that the embodiment of the invention provides can guarantee the production in enormous quantities of producer; To different LED loads, only need carry out program updates and can realize coupling singlechip chip, reduced manpower and material resources cost; Improve production efficiency, also guaranteed supply of material quality simultaneously.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the theory diagram of driving power control circuit in one embodiment of the invention;
Fig. 2 is the part-structure sketch map that feedback control circuit is connected with single chip machine controlling circuit in one embodiment of the invention;
Fig. 3 is the circuit structure diagram that software is rewritten output voltage controlling circuit in one embodiment of the invention;
Fig. 4 is the circuit structure diagram of single chip machine controlling circuit in one embodiment of the invention;
Fig. 5 is the circuit structure diagram of load current control circuit in one embodiment of the invention;
Fig. 6 is the circuit structure diagram that drive signal quickens to promote circuit in one embodiment of the invention;
Fig. 7 is the part-structure sketch map that current foldback circuit is connected with the load circuit control circuit in one embodiment of the invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making all other embodiment that obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
In addition, for the present invention is described better, provided numerous details in the embodiment hereinafter.It will be appreciated by those skilled in the art that does not have these details, and the present invention can implement equally.In other embodiment, describe in detail for method, means, element and the circuit of known, so that highlight purport of the present invention.
Shown in Figure 1 is the circuit theory diagrams of the driving power control circuit of the embodiment of the invention; This driving power control circuit comprises current rectifying and wave filtering circuit 101; DC/DC transforming circuit 102, ON-OFF control circuit 103, feedback control circuit 104 and secondary output rectification circuit 105; Current rectifying and wave filtering circuit 101; DC/DC transforming circuit 102 and secondary output rectification circuit 105 connect successively; The voltage output of ON-OFF control circuit 103 control DC/DC transforming circuits 102; Feedback control circuit 104 is connected between secondary output rectification circuit 105 and the ON-OFF control circuit 103; The voltage sample end of feedback control circuit 104 connects a single chip machine controlling circuit 106, and said single chip machine controlling circuit 106 is used to produce the feedback voltage output of a control signal PWM1 Control and Feedback control circuit 104.
Can adopt rectifier bridge and filter capacitor to constitute for the filter rectifier in the embodiment of the invention 101; DC/DC transforming circuit 102 can adopt coil transformer to constitute; Wherein a termination of the primary coil of coil transformer is gone into the direct voltage through rectifier bridge and filter capacitor; The other end of the primary coil of coil transformer is through a switching tube ground connection, and control end of switching tube is controlled by ON-OFF control circuit, when ON-OFF control circuit is exported a series of pulse voltage to control end of switching tube; On primary coil, will produce a pulse voltage; Thereby be coupled on the secondary coil of coil transformer, and the secondary coil of coil transformer links to each other with secondary output rectification circuit, realize the function of DC/DC conversion; ON-OFF control circuit 103 can adopt existing PWM module control circuit; The feedback pin of pwm chip can receive the feedback voltage of feedback control circuit 104; Between ON-OFF control circuit 103 and feedback control circuit 104, can adopt optocoupler to be coupled; Can help the isolation effect between the primary and secondary, feedback control circuit 104 has the voltage sample end, and this voltage sample end need be sampled to the voltage of load place; Therefore this voltage sample end is connected on the output of secondary output rectification circuit, and the output of secondary output rectification circuit is connecting the LED load; Secondary output rectification circuit 105 mainly is the process that the direct voltage by the output of DC/DC translation circuit is further carried out rectification, filtering and voltage stabilizing; Above circuit structure can be given unnecessary details with reference to the interlock circuit structure of existing driving power here no longer one by one.
In one embodiment; As shown in Figure 2; Feedback control circuit has voltage sample end A, and feedback control circuit carries out voltage sample by the output VO+ end of secondary output rectification circuit, and this voltage sampling circuit is by resistance R 52; Resistance R 53; Resistance R 54 series connection constitute, and resistance R 54 is connected to earth terminal, and the voltage sample end A of feedback control circuit is connected to being connected in series a little of resistance R 54 and resistance R 53; The voltage levvl of the output VO+ end of secondary output rectification circuit can be embodied by the dividing potential drop on the resistance R 54; When the voltage of the output VO+ of secondary output rectification circuit end raise, the dividing potential drop on the resistance R 54 also increased, and then feedback control circuit is controlled the feedback voltage that exports ON-OFF control circuit to according to the sample voltage value (being the voltage on the resistance R 54) of its voltage sample end A and realized the FEEDBACK CONTROL to driving power; The voltage sample end of feedback control circuit 104 connects a single chip machine controlling circuit 106 in the embodiment of the invention; In fact be; The voltage sample end A place that the branch of output VO+ end on resistance R 54 of the control signal PWM1 of single chip machine controlling circuit output and secondary output rectification circuit is pressed in feedback control circuit superposes, and in the time need making adjustment to the output of driving power, for example need reduce the voltage output of driving power; Then export the voltage sample end A of a control signal PWM1 to feedback control circuit by single chip machine controlling circuit; The magnitude of voltage of control signal PWM1 is during greater than the sampling partial pressure value on the resistance R 54, and the sampling function of resistance R 54 is by shielding by force, and then replaced by control signal PWM1; At this moment, the voltage output meeting of whole driving power is regulated by control signal PWM1.And can be different for the required driving voltage of LED loads different in each; For example its electric pressure is divided from high to low and be divided into A level, B level and C level; Then the driving power control circuit in the embodiment of the invention is when coupling A level LED load; Need the highest driving power voltage, then single chip machine controlling circuit can not exported control signal PWM1, promptly is equivalent to mask single chip machine controlling circuit; And when the driving power control circuit in the embodiment of the invention need mate the LED load of B level; Control signal PWM1 (for example 5V) who is higher than the dividing potential drop of A step voltage on resistance R 54 of single chip machine controlling circuit output; Because the intervention of control signal PWM1; The voltage that the voltage sample end A of feedback control circuit is received is actual to be the voltage signal of control signal PWM1; Because this moment, the voltage of control signal PWM1 was higher than the dividing potential drop on the resistance R 54, so feedback control circuit can be adjusted the feedback signal (for example reducing feedback voltage signal) to ON-OFF control circuit; When the driving power control circuit in the embodiment of the invention need mate the LED load of C level; Control signal PWM1 (for example 10V) that amplitude is higher of single chip machine controlling circuit output, then the control signal PWM1 of feedback control circuit after according to this risings adjusts the feedback signal (for example further reducing feedback voltage signal) to ON-OFF control circuit; Thereby realize LED load voltage output coupling to different brackets.
In another embodiment; Also be connected a software between single chip machine controlling circuit and the feedback control circuit and rewrite output voltage controlling circuit, Fig. 3 shows the circuit structure that this software is rewritten output voltage controlling circuit, and said software is rewritten output voltage controlling circuit and comprised first filter circuit 31 that said control signal PWM1 is carried out filtering; Resistance R 67; Operational amplifier U6A, resistance R 66, diode D12 and resistance R 69; First filter circuit exports the positive input of operational amplifier U6A to; Be connected resistance R 66 between the reverse input end of operational amplifier U6A and the output; Resistance R 67 is connected between operational amplifier and the ground, and the series arm that the output of operational amplifier U6A constitutes through diode D12 and resistance R 69 is connected to the voltage sample end A of feedback control circuit.First filter circuit 31 is by resistance R 45 in the embodiment of the invention, resistance R 46, resistance R 47; Resistance R 50, capacitor C 31, capacitor C 32; Capacitor C 33 constitutes resistance R 45, resistance R 46; 50 series connection of resistance 47 and resistance R, on the series connection node of per two resistance respectively and connect an electric capacity to earth terminal, thereby the noise of control signal PWM1 is carried out filtering.When control signal PWM1 arrives the positive input of operational amplifier U6A through first filter circuit; Its dividing potential drop Ver on resistance R 67 can be amplified by operational amplifier U6A; Pass through resistance R 69 then and on resistance R 54, form dividing potential drop; Because the voltage sample end A of feedback control circuit is connected between above-mentioned resistance R 53 and the resistance R 54; Therefore the dividing potential drop on the resistance R 54 acts directly on the voltage sample end A of feedback control circuit; In order to prevent the anti-part rewriting output voltage controlling circuit that eases back of irritating of electric current, diode D12 is linked into the output that software is rewritten output voltage controlling circuit, forms the voltage sample end A of unidirectional current passage a to feedback control circuit.For the misoperation (the voltage Ver as with positive input has carried out unlimited amplification) that prevents operational amplifier U6A; Reverse input end and output at operational amplifier U6A in the embodiment of the invention insert a feedback resistance R66; Form a negative feedback loop, can adjust the output end voltage of operational amplifier.Software in the embodiment of the invention is rewritten output voltage controlling circuit and is the control signal PWM1 of single chip machine controlling circuit output is amplified; Prevent that control signal PWM1 from distortion phenomenon occurring in the process of transmission; Simultaneously can carry out the power reinforcement, improve its load capacity control signal PWM1.
In another embodiment; The driving power control circuit also comprises load current control circuit; Said load current control circuit has switch passage and control end; Its switch passage is connected between load negative terminal LED-and the earth terminal, and its control end is connected in single chip machine controlling circuit, said single chip machine controlling circuit produce a load current control signal PWM2 be used for control load circuit control circuit the switch passage conducting with end.Load current control circuit is connected between the negative terminal and earth terminal of load in the embodiment of the invention; Therefore the switch passage of load current control circuit is the necessary channel of load current; The control end of load current control circuit receives the load current control signal PWM2 that single chip machine controlling circuit produces; When load current control signal PWM2 is chosen as pulse signal; The synthetic ON time that has then determined the switch passage of load current control circuit of its pulse duration and frequency, and then realized letting load obtain the average current in the one-period, the electric current that flows through the LED module is controlled effectively.Than the structure of existing driving power control circuit, the negative terminal that available circuit is employed in load is connected through a current-limiting resistance with earth terminal, does not therefore possess the arbitrarily function of control of electric current.
It is understandable that; Singlechip chip in the single chip machine controlling circuit has a plurality of I/O mouths; Be illustrated in figure 4 as the circuit structure of single chip machine controlling circuit in the embodiment of the invention, the singlechip chip U7 that it adopts has a plurality of I/O mouths, wherein; The P3 mouth of singlechip chip U7 is as the data transmit-receive and the function control port of single chip machine controlling circuit; Wherein control signal PWM1 is by the P33 pin output of singlechip chip, and load current control signal PWM2 is by the P32 pin output of singlechip chip U7, and data reading port is the P30 pin of singlechip chip U7; The write data port is the P31 pin of singlechip chip U7; The technical staff in present technique field can carry out different definition to the pin of singlechip chip through program, therefore, just merely should not be construed as the restriction to protection range of the present invention for the output signal in the enterprising line translation of the pin of singlechip chip.
In one embodiment above-mentioned load current control circuit has been carried out further improvement; As shown in Figure 5; Said load current control circuit comprises metal-oxide-semiconductor Q4, resistance R 60, and the grid of metal-oxide-semiconductor is the control end G of load circuit control circuit; The drain electrode of metal-oxide-semiconductor Q4 connects load negative terminal LED-; The source electrode of metal-oxide-semiconductor connects earth terminal through resistance R 60, so the switch passage is the drain-source utmost point passage of metal-oxide-semiconductor Q4 and the resistance R 60 of connection thereof in the embodiment of the invention, and resistance R 60 has metering function herein.
In order to improve the driving force of load current control signal PWM2 to metal-oxide-semiconductor Q4; Made another improvement in another embodiment; Comprise that also drive signal acceleration promotes circuit; Said drive signal is quickened to promote circuit and is comprised driving voltage source and driving switch, and said driving power links to each other with the control end of metal-oxide-semiconductor Q4 through the switch passage of driving switch, and the control end of said driving switch is connected in the load current control signal PWM2 output of single chip machine controlling circuit.When the load current control signal PWM2 of single chip machine controlling circuit output exports the control end of driving switch to; The switch passage conducting of controlling and driving switch; Then the voltage signal of driving power is incorporated into the control end (being the grid of metal-oxide-semiconductor Q4) of load current control circuit through the switch passage of driving switch, realizes the drive controlling (conducting of control metal-oxide-semiconductor Q4 with by) to the switch passage of load current control circuit.
In one embodiment, as shown in Figure 6, driving power adopts the 15V voltage source; Above-mentioned driving switch comprises resistance R 58, resistance R 62, NPN type triode Q6; Positive-negative-positive triode Q5, resistance R 55, resistance R 56; Resistance R 59, wherein, it is that NPN type triode Q6 provides base bias voltage that resistance R 58 constitutes the bias pressure circuit with resistance R 62; It is that positive-negative-positive triode Q5 provides base bias voltage that resistance R 55 constitutes the bias pressure circuit with resistance R 56; The emitter of NPN type triode Q6 and resistance R 62 equal ground connection, the collector electrode of NPN type triode Q6 is connected to the base stage of positive-negative-positive triode Q5 through resistance R 56, and resistance R 55 all connects driving power (15V) with the emitter of positive-negative-positive triode Q5; The collector electrode of positive-negative-positive triode Q5 is connected to the control end G (being the grid of metal-oxide-semiconductor Q4) of load current control circuit through resistance R 59, and resistance R 58 is connected in the load current control signal PWM2 output of single chip machine controlling circuit.
For the electric weight accumulation of the junction capacitance that prevents metal-oxide-semiconductor Q4 grid, the control end G of metal-oxide-semiconductor Q4 also is connected with a bleeder resistance in the embodiment of the invention, and bleeder resistance can be with the unnecessary electric weight earth terminal of releasing.It is understandable that bleeder resistance can directly be connected with earth terminal, also can be connected to earth terminal through the current-limiting resistance R60 that load place connects.
In another embodiment; Be serially connected with an inspection leakage resistance on the switch passage of load current control circuit; The anode of inspection leakage resistance is connected with current foldback circuit; Said current foldback circuit comprises comparison circuit and control switch, and an input of comparison circuit connects voltage reference, the anode of another input termination inspection leakage resistance of comparison circuit; The control end of the output termination control switch of comparison circuit, the switch passage of control switch are connected between the control end and earth terminal of load current control circuit; The positive terminal voltage of inspection leakage resistance is during greater than voltage reference, the switch passage conducting of comparison circuit control control switch.It is understandable that; The anode of another input termination inspection leakage resistance of comparison circuit; Be in order to carry out current sample from load, having defined the end that the inspection leakage resistance links to each other with the switch passage here is anode, and promptly the electric current in the load flows through the switch passage earlier; Therefore stream flows to the anode of inspection leakage resistance more then, and examining the end that leakage resistance links to each other with earth terminal is negative terminal.
Particularly, as shown in Figure 7, said in another embodiment comparison circuit comprises comparator U6B, diode D13, resistance R 63 and capacitor C 35; The anode of diode D13 connects the output of comparator U6B; The negative electrode of diode D13 connects the positive input of comparator U6B; The positive input of comparator U6B is connected to the anode of examining leakage resistance through resistance R 63, and the positive input of comparator U6B is through capacitor C 35 ground connection; Said control switch is triode Q7, and the output of comparator U6B connects the base stage of triode Q7, and the collector electrode of triode Q7 connects the control end of load current control circuit, the grounded emitter of triode Q7; The resistance R 60 that load current control circuit is connected in series in the switch passage in the embodiment of the invention is served as the inspection leakage resistance; In order to prevent that examining leakage resistance in use is damaged; At the two ends of resistance R 60 and connect a resistance R 61, can't have influence on the function of inspection stream in the embodiment of the invention; The capacitor C 35 that inserts in the embodiment of the invention is done the integration false action-proof; Diode D13 is connected between output and the positive input of comparator U6B and constitutes a regenerative circuit; Thereby the voltage of locking positive input; Guarantee that comparator U6B continues the output high level, keeps the conducting of triode Q7, with the currentless purpose of proof load.Said voltage reference is made up of with the dividing potential drop of connecting of resistance 64 through a resistance R 57 a 5V voltage source, resistance R 64 ground connection, and resistance R 57 connects the 5V voltage source, for the voltage signal that guarantees voltage reference is level and smooth, capacitor C 28 of parallel connection on resistance R 64.
When load current is excessive; The voltage of inspection on the leakage resistance also increases thereupon, and the voltage of comparator U6B positive input increases, when the voltage of comparator U6B positive input during greater than voltage reference (dividing potential drop of 5V voltage source on resistance R 64); Triode Q7 is switched on; The voltage of the control end G of load current control circuit (grid of metal-oxide-semiconductor Q4) is dragged down, and the switch passage of load current control circuit ends, thus the proof load trouble free service.
More than a kind of driving power control circuit that the embodiment of the invention provided has been carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1. the driving power control circuit comprises current rectifying and wave filtering circuit, DC/DC transforming circuit, ON-OFF control circuit, feedback control circuit and secondary output rectification circuit; Current rectifying and wave filtering circuit; DC/DC transforming circuit and secondary output rectification circuit connect successively; The voltage output of ON-OFF control circuit control DC/DC transforming circuit; Feedback control circuit is connected between secondary output rectification circuit and the ON-OFF control circuit, it is characterized in that: the voltage sample end of feedback control circuit connects a single chip machine controlling circuit, and said single chip machine controlling circuit is used to produce the feedback voltage output of a control signal PWM1 Control and Feedback control circuit.
2. driving power control circuit as claimed in claim 1; It is characterized in that: also be connected a software between single chip machine controlling circuit and the feedback control circuit and rewrite output voltage controlling circuit; Said software is rewritten output voltage controlling circuit and is comprised first filter circuit that said control signal PWM1 is carried out filtering, resistance R 67, operational amplifier U6A; Resistance R 66, diode D12 and resistance R 69; First filter circuit exports the positive input of operational amplifier U6A to; Be connected resistance R 66 between the reverse input end of operational amplifier U6A and the output; Resistance R 67 is connected between operational amplifier and the ground, and the series arm that the output of operational amplifier U6A constitutes through diode D12 and resistance R 69 is connected to the voltage sample end of feedback control circuit.
3. driving power control circuit as claimed in claim 1; It is characterized in that: also comprise load current control circuit; Said load current control circuit has switch passage and control end; Its switch passage is connected between load negative terminal LED-and the earth terminal, and its control end is connected in single chip machine controlling circuit, said single chip machine controlling circuit produce a load current control signal PWM2 be used for control load circuit control circuit the switch passage conducting with end.
4. driving power control circuit as claimed in claim 3; It is characterized in that: said load current control circuit comprises metal-oxide-semiconductor Q4; Resistance R 60; The grid of metal-oxide-semiconductor is the control end of load circuit control circuit, and the drain electrode of metal-oxide-semiconductor connects load negative terminal LED-, and the source electrode of metal-oxide-semiconductor connects earth terminal through resistance R 60.
5. driving power control circuit as claimed in claim 3; It is characterized in that: comprise that also drive signal acceleration promotes circuit; Said drive signal is quickened to promote circuit and is comprised driving voltage source and driving switch; Said driving power links to each other with the control end of metal-oxide-semiconductor Q4 through the switch passage of driving switch, and the control end of said driving switch is connected in the load current control signal PWM2 output of single chip machine controlling circuit.
6. driving power control circuit as claimed in claim 5 is characterized in that: the control end of metal-oxide-semiconductor Q4 also is connected with a bleeder resistance.
7. driving power control circuit as claimed in claim 5 is characterized in that: said driving switch comprises resistance R 58, resistance R 62; NPN type triode Q6, positive-negative-positive triode Q5, resistance R 55; Resistance R 56; Resistance R 59, wherein, it is that NPN type triode Q6 provides base bias voltage that resistance R 58 constitutes the bias pressure circuit with resistance R 62; It is that positive-negative-positive triode Q5 provides base bias voltage that resistance R 55 constitutes the bias pressure circuit with resistance R 56; The emitter of NPN type triode Q6 and resistance R 62 equal ground connection, the collector electrode of NPN type triode Q6 is connected to the base stage of positive-negative-positive triode Q5 through resistance R 56, and resistance R 55 all connects driving power with the emitter of positive-negative-positive triode Q5; The collector electrode of positive-negative-positive triode Q5 is connected to the control end of load current control circuit through resistance R 59, and resistance R 58 is connected in the load current control signal PWM2 output of single chip machine controlling circuit.
8. driving power control circuit as claimed in claim 3; It is characterized in that: be serially connected with an inspection leakage resistance on the switch passage of load current control circuit; The anode of inspection leakage resistance is connected with current foldback circuit; Said current foldback circuit comprises comparison circuit and control switch, and an input of comparison circuit connects voltage reference, the anode of another input termination inspection leakage resistance of comparison circuit; The control end of the output termination control switch of comparison circuit, the switch passage of control switch are connected between the control end and earth terminal of load current control circuit; The positive terminal voltage of inspection leakage resistance is during greater than voltage reference, the switch passage conducting of comparison circuit control control switch.
9. driving power control circuit as claimed in claim 8 is characterized in that: said comparison circuit comprises comparator U6B, diode D13, resistance R 63 and capacitor C 35; The anode of diode D13 connects the output of comparator U6B; The negative electrode of diode D13 connects the positive input of comparator U6B; The positive input of comparator U6B is connected to the anode of examining leakage resistance through resistance R 63, and the positive input of comparator U6B is through capacitor C 35 ground connection; Said control switch is triode Q7, and the output of comparator U6B connects the base stage of triode Q7, and the collector electrode of triode Q7 connects the control end of load current control circuit, the grounded emitter of triode Q7.
10. like claim 8 or 9 described driving power control circuits, it is characterized in that: said voltage reference is made up of with the dividing potential drop of connecting of resistance 64 through a resistance R 57 a 5V voltage source, resistance R 64 ground connection, and resistance R 57 connects the 5V voltage source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210250400.9A CN102740572B (en) | 2012-07-18 | 2012-07-18 | Driving power control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210250400.9A CN102740572B (en) | 2012-07-18 | 2012-07-18 | Driving power control circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102740572A true CN102740572A (en) | 2012-10-17 |
| CN102740572B CN102740572B (en) | 2015-09-30 |
Family
ID=46995086
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210250400.9A Expired - Fee Related CN102740572B (en) | 2012-07-18 | 2012-07-18 | Driving power control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102740572B (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102917499A (en) * | 2012-10-19 | 2013-02-06 | 西安文理学院 | DC (Direct Current)/DC-based LED (Light Emitting Diode) driving controller for lighting |
| CN103311879A (en) * | 2013-05-29 | 2013-09-18 | 广州凯盛电子科技有限公司 | Large-power LED (Light-Emitting Diode) driver and boosting converter protection circuit thereof |
| CN103840426A (en) * | 2012-11-21 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Step-up protection circuit |
| CN103874268A (en) * | 2012-12-17 | 2014-06-18 | 深圳市海洋王照明工程有限公司 | LED (light emitting diode) lamp and start self-locking circuit thereof |
| CN104100851A (en) * | 2013-04-08 | 2014-10-15 | 赵依军 | LED (Light Emitting Diode) driving power supply integrated lamp holder |
| CN104349526A (en) * | 2013-07-23 | 2015-02-11 | 北京华通时空通信技术有限公司 | White light LED communication driving circuit and white light LED communication driving method |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
| CN105444043A (en) * | 2015-12-31 | 2016-03-30 | 重庆市光遥光电节能科技有限公司 | Fiber transmission eye-protective desk lamp |
| CN105916259A (en) * | 2016-06-21 | 2016-08-31 | 新和（绍兴）绿色照明有限公司 | Intelligent remotely-controlled LED lamp |
| CN111163564A (en) * | 2020-01-10 | 2020-05-15 | 东莞锐视光电科技有限公司 | Method for stably controlling current in light source |
| CN111725780A (en) * | 2019-03-21 | 2020-09-29 | 贵州振华群英电器有限公司（国营第八九一厂） | Circuit for preventing current backflow and application thereof |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
| CN111839345A (en) * | 2019-04-24 | 2020-10-30 | 苏州市春菊电器有限公司 | Automatic suction adjusting method and system of dust collector |
| CN114895741A (en) * | 2022-06-09 | 2022-08-12 | 盈帜科技（常州）有限公司 | Output voltage regulating circuit |
| CN117354996A (en) * | 2023-02-02 | 2024-01-05 | 上海谭慕半导体科技有限公司 | Control system and method for LED driver, and readable storage medium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505105A (en) * | 2008-01-18 | 2009-08-12 | 电力集成公司 | Control arrangement for a resonant mode power converter |
| CN201414084Y (en) * | 2009-03-31 | 2010-02-24 | 深圳市安邦信电子有限公司 | Switch power supply based on quasi-resonance |
| CN201733211U (en) * | 2010-07-20 | 2011-02-02 | 广东斯泰克电子科技有限公司 | Multi-input power adapter |
| CN202738196U (en) * | 2012-07-18 | 2013-02-13 | 广州凯盛电子科技有限公司 | Driving power control circuit |
-
2012
- 2012-07-18 CN CN201210250400.9A patent/CN102740572B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101505105A (en) * | 2008-01-18 | 2009-08-12 | 电力集成公司 | Control arrangement for a resonant mode power converter |
| CN201414084Y (en) * | 2009-03-31 | 2010-02-24 | 深圳市安邦信电子有限公司 | Switch power supply based on quasi-resonance |
| CN201733211U (en) * | 2010-07-20 | 2011-02-02 | 广东斯泰克电子科技有限公司 | Multi-input power adapter |
| CN202738196U (en) * | 2012-07-18 | 2013-02-13 | 广州凯盛电子科技有限公司 | Driving power control circuit |
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102917499A (en) * | 2012-10-19 | 2013-02-06 | 西安文理学院 | DC (Direct Current)/DC-based LED (Light Emitting Diode) driving controller for lighting |
| CN103840426A (en) * | 2012-11-21 | 2014-06-04 | 深圳市海洋王照明工程有限公司 | Step-up protection circuit |
| CN103840426B (en) * | 2012-11-21 | 2018-04-27 | 深圳市海洋王照明工程有限公司 | One kind rises voltage protection circuit |
| CN103874268B (en) * | 2012-12-17 | 2016-08-03 | 深圳市海洋王照明工程有限公司 | A kind of LED lamp and startup latching circuit thereof |
| CN103874268A (en) * | 2012-12-17 | 2014-06-18 | 深圳市海洋王照明工程有限公司 | LED (light emitting diode) lamp and start self-locking circuit thereof |
| CN104100851A (en) * | 2013-04-08 | 2014-10-15 | 赵依军 | LED (Light Emitting Diode) driving power supply integrated lamp holder |
| CN103311879B (en) * | 2013-05-29 | 2016-08-17 | 广州凯盛电子科技有限公司 | High-power LED driver |
| CN103311879A (en) * | 2013-05-29 | 2013-09-18 | 广州凯盛电子科技有限公司 | Large-power LED (Light-Emitting Diode) driver and boosting converter protection circuit thereof |
| CN104349526A (en) * | 2013-07-23 | 2015-02-11 | 北京华通时空通信技术有限公司 | White light LED communication driving circuit and white light LED communication driving method |
| CN104349526B (en) * | 2013-07-23 | 2016-09-14 | 北京华通时空通信技术有限公司 | White light LEDs communication drive circuit and white light LEDs communication drivers method |
| CN104754800A (en) * | 2013-12-27 | 2015-07-01 | 欧普照明股份有限公司 | Device for controlling input surge current of LED module |
| CN104754800B (en) * | 2013-12-27 | 2017-05-31 | 欧普照明股份有限公司 | A kind of control device of LED modules inrush current |
| CN105444043A (en) * | 2015-12-31 | 2016-03-30 | 重庆市光遥光电节能科技有限公司 | Fiber transmission eye-protective desk lamp |
| CN105916259A (en) * | 2016-06-21 | 2016-08-31 | 新和（绍兴）绿色照明有限公司 | Intelligent remotely-controlled LED lamp |
| CN105916259B (en) * | 2016-06-21 | 2017-07-21 | 新和（绍兴）绿色照明有限公司 | A kind of intelligent distant control LED |
| CN111725780A (en) * | 2019-03-21 | 2020-09-29 | 贵州振华群英电器有限公司（国营第八九一厂） | Circuit for preventing current backflow and application thereof |
| CN111839345A (en) * | 2019-04-24 | 2020-10-30 | 苏州市春菊电器有限公司 | Automatic suction adjusting method and system of dust collector |
| CN111163564A (en) * | 2020-01-10 | 2020-05-15 | 东莞锐视光电科技有限公司 | Method for stably controlling current in light source |
| CN111830816A (en) * | 2020-06-28 | 2020-10-27 | 南京天朗防务科技有限公司 | Self-adaptive timing method and device |
| CN114895741A (en) * | 2022-06-09 | 2022-08-12 | 盈帜科技（常州）有限公司 | Output voltage regulating circuit |
| CN117354996A (en) * | 2023-02-02 | 2024-01-05 | 上海谭慕半导体科技有限公司 | Control system and method for LED driver, and readable storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102740572B (en) | 2015-09-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102740572A (en) | Driving power supply control circuit | |
| CN104106315B (en) | Led matrix manager | |
| CN102843025B (en) | Control circuit, control method, and power supply system for power factor correction (PFC) circuit | |
| CN205912291U (en) | Unify LED intelligence power that compatible multiple current of adjusting luminance set up mode more | |
| CN107222953B (en) | Numerical model analysis dims constant-current controller integrated circuit | |
| CN103957648B (en) | Controllable silicon, simulation, PWM light modulation universal circuit and LED drive chip | |
| CN106231737A (en) | PWM isolation light adjusting circuit and LED dimming drive power | |
| CN104158525B (en) | Powered the optical drive IGBT devices with pulse signal transmission based on simple optical fiber | |
| CN207083257U (en) | Numerical model analysis dims constant-current controller and drives the device of current source loadses | |
| CN103560655A (en) | Driver and system thereof based on parallel connection of multiple power semiconductor devices | |
| CN106793243A (en) | 0~10V LED dim signals change-over circuits and LED power light adjusting circuit | |
| CN107454712A (en) | Display device, lighting device and can simultaneously constant current and constant pressure output power circuit | |
| CN202738196U (en) | Driving power control circuit | |
| CN206370965U (en) | 0~10V LED dim signals change-over circuits and LED power light adjusting circuit | |
| CN103152939B (en) | A kind of LED power four-in-one light adjusting circuit | |
| CN103326579A (en) | Magnetic isolation feedback circuit | |
| CN103646635B (en) | Level shifter and booster driving circuit | |
| CN108366448A (en) | One kind can just can negative logic LED light adjusting circuits and driving power | |
| CN102088284B (en) | PECL (Positive Emitter Coupling Logic) level interface circuit | |
| CN204206530U (en) | Dimmer, light adjusting system and illuminator | |
| CN104039039B (en) | A kind of constant current LED drive circuit exporting two-way | |
| CN205491277U (en) | Dimmer circuit system | |
| CN207612441U (en) | LED parallel current-equalizing circuits | |
| CN102545621A (en) | Switching power supply and control method thereof | |
| CN207692097U (en) | A kind of input signal isolation circuit of isolation adjusting control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zeng Weijian Inventor after: Tu Daoping Inventor before: Tu Daoping |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: TU DAOPING TO: CENG WEIJIAN TU DAOPING |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190916 Address after: 044000 Second Floor of Hongqiao Building, Fudan Street, Salt Lake District, Yuncheng City, Shanxi Province Patentee after: SHANXI ZHAOXIN ELECTRIC POWER EQUIPMENT Co.,Ltd. Address before: 510000 C D building, Cang Lian Industrial Park, Po Road South, Whampoa District, Guangzhou, Guangdong Patentee before: GUANGZHOU KAISEN ELECTRONIC TECHNOLOGY Co.,Ltd. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150930 Termination date: 20210718 |