CN103763841B - High Power Factor is without the LED drive circuit of stroboscopic - Google Patents
High Power Factor is without the LED drive circuit of stroboscopic Download PDFInfo
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- CN103763841B CN103763841B CN201410048087.XA CN201410048087A CN103763841B CN 103763841 B CN103763841 B CN 103763841B CN 201410048087 A CN201410048087 A CN 201410048087A CN 103763841 B CN103763841 B CN 103763841B
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Abstract
The invention discloses the LED drive circuit of a kind of High Power Factor without stroboscopic, in this LED drive circuit, contain decompression transducer structure and boost inverter structure simultaneously.Adopt after said structure, this High Power Factor can continuous operation within a power frequency period without the LED drive circuit of stroboscopic, has the energy transferring from input voltage to output voltage all the time, makes output current there is not working frequency ripple wave.This High Power Factor can realize without the need to larger output capacitance and special Active PFC constant current output control chip the object improving power factor and solution stroboscopic without the LED drive circuit of stroboscopic simultaneously.
Description
Technical field
The present invention relates to a kind of LED drive circuit, particularly relate to the LED drive circuit of a kind of High Power Factor without stroboscopic.
Background technology
When Switching Power Supply is used for driving LED light-emitting diode, for making LED light-emitting diode luminance keep constant, require that LED drive power has the function of constant current output.In addition, the power factor for the LED light emitting diode bulb of incoming transport electrical network also has certain requirement, because if power factor does not reach requirement, then can cause pollution to a certain degree to electrical network.IEC International Electrotechnical Commission proposes clear and definite harmonic requirement to lighting, i.e. IEC61000-3-2 standard; The asterisk standard regulation of american energy, LED light emitting diode bulb power being greater than to 5W requires that power factor is not less than 0.7; European standard specifies, requires that power factor is higher than 0.9 for the LED light emitting diode bulb being greater than 25W.From the situation of practical application, to the requirement of power factor mostly higher than the regulation of above-mentioned standard.
The existing the simplest driving power that simultaneously can meet High Power Factor and wide AC-input voltage scope constant current output function is the power factor correction (PFC based on buck structure, PowerFactorCorrection) circuit, foregoing circuit can realize the function of the power factor correction of input current and the constant of output current simultaneously.Fig. 1 is the topological structure of classical buck power factor correction circuit, and it is by rectifier bridge 101, electric capacity 102, switching tube 106, diode 107, inductance 108, electric capacity 109, and equivalent load 110 forms.Wherein said rectifier bridge 101 input is ac input end, the output of described rectifier bridge 106 is connected with described electric capacity 102 two ends, the N knot of described diode 107 is connected with described electric capacity 102 anode, the P knot of described diode 107 is connected with one end of described switching tube 106, the other end ground connection of described switching tube 106, described inductance 108 one end is tied with the P of described diode 107 and is connected, the other end is connected with described electric capacity 109 one end, described electric capacity 109 other end is tied with the N of described diode 107 and is connected, and described equivalent load 110 is in parallel with described electric capacity 109.
During circuit working shown in Fig. 1, suppose that electric capacity 102 both end voltage is V1, equivalent load 110 both end voltage is V2, when described switching tube 106 is opened, described voltage V1 gives described electric capacity 109 and equivalent load 110 by described inductance 108 energy transferring, store part energy simultaneously in described inductance 108, suppose service time T1; When described switching tube 106 turns off, be stored in the energy in described inductance 108, discharged to described electric capacity 109 and equivalent load 110 by described diode 107, suppose turn-off time T2.In these cases, the pass of described output voltage V2 and input voltage V1 is:
, wherein D is the duty ratio of described switching tube 106,
.
Fig. 1 shows the topological structure of classical buck power factor correction circuit, it also needs the external auxiliary element adding power factor correction constant-current driven chip and this driving chip normally to work in actual applications, and Fig. 2 is just the actual realizing circuit based on the buck structure shown in Fig. 1.Circuit shown in Fig. 2 by rectifier bridge 201, electric capacity 202, diode 207, inductance 208, electric capacity 209, LED load 211, resistance 211, resistance 212, resistance 213, resistance 214, electric capacity 215, diode 216, control chip 217, switch MOS pipe 218, resistance 219, electric capacity 220, auxiliary winding 221 forms.Wherein control chip 217 is a special power factor correction constant-current driven chips, its with SY5814 chip for representative.
Fig. 3 is sequential chart during circuit working shown in Fig. 2.In order to improve power factor, improve the angle of flow of input current, the capacity of described electric capacity 202 can be very little.In addition, because circuit shown in Fig. 2 is the buck structure based on Fig. 1, when only having described electric capacity 202 both end voltage V3 to be greater than the described voltage V4 at electric capacity 209 two ends described in output, just the voltage transitions being input to output and Energy Transfer can be completed.That is, as shown in Figure 3, in a power frequency period 0 ~ T5, only in T1 ~ T2, T3 ~ T4, described control chip 217 just has switch motion, described control chip 217 constant service time, then according to Lenz's law
, so input current can follow the change of input voltage, input current envelope near sinusoidal (see I1 waveform in Fig. 3), and then improves power factor.So in 0 ~ T1T2 ~ T3T4 ~ T5, when described electric capacity 202 both end voltage V3 is less than the voltage V4 at electric capacity 209 two ends described in output, the decompression transducer shown in Fig. 2, cannot complete voltage transitions, not energy transferring.Output current I2 is that the energy stored by described output capacitance 209 maintains, larger ripple voltage (see V4 waveform in Fig. 3) must be had, when load is LED load, the electric current flowing through LED load will have larger ripple current (see I2 waveform in Fig. 3), can produce stroboscopic phenomenon.
The cyclic variation of output current ripple can cause the change of LED luminance.Although human eye not easily discovers the change of the brightness of this 100Hz, long-time in this lighting environment, human eye has strong sense of fatigue.In addition, in video illumination application places, video pictures brightness has scintillation.Although above-mentioned defect can be solved by increasing output capacitance, significantly the cost of circuit integrity and the volume of power supply can be increased like this.Such as, if output ripple electric current is reduced by 90%, so output capacitance capacity will at least increase by 10 times, and the volume of output capacitance also at least increases by 10 times.This adopts the method increasing output capacitance capacity to be unpractical in actual applications.
In sum, problem demanding prompt solution is, just can overcome the above-mentioned defect of existing LED drive scheme without the need to increasing output capacitance.
Summary of the invention
Technical problem to be solved by this invention is, there is provided a kind of High Power Factor without the LED drive circuit of stroboscopic, it can realize the object improving power factor and solve stroboscopic without the need to larger output capacitance and special Active PFC and constant current output control chip.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of High Power Factor is without the LED drive circuit of stroboscopic, this drive circuit comprises: the first rectifier bridge, first electric capacity, first inductance, first diode, second electric capacity, first switching tube, second diode, second inductance, 3rd electric capacity, power management control chip, wherein, the output of described first rectifier bridge is connected with the two ends of described first electric capacity, the ungrounded end of described first electric capacity is connected to one end of described first inductance, the other end of described first inductance is connected to the P knot of described first diode, the N knot of described first diode is connected to one end of described second inductance respectively, the P knot of described second diode and the drain electrode of described first switching tube, the other end of described second inductance is connected to one end of described 3rd electric capacity, the N knot of described second diode is connected to the other end of described 3rd electric capacity and one end of described second electric capacity respectively, the source ground of described first switching tube, the other end ground connection of described second electric capacity, the two ends of described 3rd electric capacity are that external loading is powered, described power management control chip is multiple power source management control chip.
Further, described High Power Factor is without in the LED drive circuit of stroboscopic, the model of described power management control chip is SG6858, LD7535, OB2263 or RT7730, and the peripheral support circuit of described power management control chip comprises: the first auxiliary resistance, the 3rd auxiliary resistance, the first optocoupler, the first auxiliary capacitor, the 5th auxiliary resistance, the 6th auxiliary resistance, the first auxiliary winding and the first booster diode, wherein, described 3rd auxiliary resistance is connected between the negative terminal of described external loading and the 3rd electric capacity, described first optocoupler is in parallel with described 3rd auxiliary resistance, described first opto-coupled feedback is held and GND end to the FB of described power management control chip, described power management control chip holds output switch modulation signal to the grid of described first switching tube by GATE, the vdd terminal of described power management control chip is connected to one end of described first auxiliary resistance respectively, the N knot of described first booster diode and one end of described first auxiliary capacitor, the other end of described first auxiliary resistance is connected to the anode of described external loading, the described first auxiliary winding earth of P knot by powering to described power management control chip of described first booster diode, the other end ground connection of described first auxiliary capacitor, the SENSE end of described power management control chip and RI end are respectively by described 6th auxiliary resistance and described 5th auxiliary resistance ground connection, the source electrode of described first switching tube is connected to described SENSE and holds.
Further, described High Power Factor also comprises without the LED drive circuit of stroboscopic: the second auxiliary resistance, and described second auxiliary resistance is connected with described first auxiliary resistance.
Further, described High Power Factor also comprises without the LED drive circuit of stroboscopic: the 4th auxiliary resistance, and described 4th auxiliary resistance is connected with described first optocoupler.
Further, described High Power Factor is without in the LED drive circuit of stroboscopic, and described first switching tube is switch MOS pipe.
A kind of High Power Factor is without the LED drive circuit of stroboscopic, this drive circuit comprises: the second rectifier bridge, 4th electric capacity, 3rd inductance, 3rd diode, 5th electric capacity, second switch pipe, 4th diode, 5th diode the 4th inductance, 6th electric capacity, second source management control chip, wherein, the output of described second rectifier bridge is connected with the two ends of described 4th electric capacity, the ungrounded end of described 4th electric capacity is connected to one end of described 3rd inductance, the other end of described 3rd inductance is connected to the P knot of described 3rd diode and the P knot of described 5th diode respectively, the N knot of described 3rd diode is connected to one end of described 4th inductance respectively, the P knot of described 4th diode and the drain electrode of described second switch pipe, the other end of described 4th inductance is connected to one end of described 6th electric capacity, the N knot of described 4th diode is connected to the N knot of described 5th diode respectively, the other end of described 6th electric capacity and one end of described 5th electric capacity, the source ground of described second switch pipe, the other end ground connection of described 5th electric capacity, the two ends of described 6th electric capacity are that the second external loading is powered, described second source management control chip is multiple power source management control chip.
Further, described High Power Factor is without in the LED drive circuit of stroboscopic, the model of described second source management control chip is SG6858, LD7535, OB2263 or RT7730, and the peripheral support circuit of described second source management control chip comprises: the 7th auxiliary resistance, the 9th auxiliary resistance, the second optocoupler, the second auxiliary capacitor, the 11 auxiliary resistance, the 12 auxiliary resistance, the second auxiliary winding and the second booster diode, wherein, described 9th auxiliary resistance is connected between the negative terminal of described second external loading and the 6th electric capacity, described second optocoupler is in parallel with described 9th auxiliary resistance, described second opto-coupled feedback is held and GND end to the FB of described second source management control chip, described second source management control chip holds output switch modulation signal to the grid of described second switch pipe by GATE, the vdd terminal of described second source management control chip is connected to one end of described 7th auxiliary resistance respectively, the N knot of described second booster diode and one end of described second auxiliary capacitor, the other end of described 7th auxiliary resistance is connected to the anode of described second external loading, the described second auxiliary winding earth of P knot by powering to described second source management control chip of described second booster diode, the other end ground connection of described second auxiliary capacitor, the SENSE end of described second source management control chip and RI end are respectively by described 12 auxiliary resistance and described 11 auxiliary resistance ground connection, the source electrode of described second switch pipe is connected to described SENSE and holds.
Further, described High Power Factor also comprises without the LED drive circuit of stroboscopic: the 8th auxiliary resistance, and described 8th auxiliary resistance is connected with described 7th auxiliary resistance.
Further, described High Power Factor also comprises without the LED drive circuit of stroboscopic: the tenth auxiliary resistance, and described tenth auxiliary resistance is connected with described second optocoupler.
Further, described High Power Factor is without in the LED drive circuit of stroboscopic, and described second switch pipe is switch MOS pipe.
Advantage of the present invention is, High Power Factor involved in the present invention is without containing decompression transducer structure and boost inverter structure in the LED drive circuit of stroboscopic simultaneously.Adopt after said structure, this High Power Factor can continuous operation within a power frequency period without the LED drive circuit of stroboscopic, has the energy transferring from input voltage to output voltage all the time, makes output current there is not working frequency ripple wave.This High Power Factor can realize the object improving power factor and solve stroboscopic simultaneously without the need to larger output capacitance and special Active PFC and constant current output control chip without the LED drive circuit of stroboscopic.
Accompanying drawing explanation
Fig. 1 is the topological structure of classical buck power factor correction circuit;
Fig. 2 is the actual realizing circuit based on the buck structure shown in Fig. 1;
Fig. 3 is simplified timing diagram during circuit working shown in Fig. 2;
Fig. 4 is the structural representation of first embodiment of the invention;
Fig. 5 is the structural representation of second embodiment of the invention;
The actual LED drive system that Fig. 6 builds in conjunction with multiple power source management control chip for circuit shown in Fig. 4;
Simplified timing diagram when Fig. 7 is system shown in Figure 6 work;
The actual LED drive system that Fig. 8 builds in conjunction with multiple power source management control chip for circuit shown in Fig. 5.
Embodiment
For disclosing technical scheme of the present invention further, be hereby described with reference to the accompanying drawings embodiments of the present invention:
Inventive concept of the present invention is: the topological structure of the buck power factor correction circuit of classics as shown in Figure 1 not only needs when real work to add special power factor correction constant-current driven chip, and it also can produce stroboscopic phenomenon simultaneously.In order to overcome above-mentioned defect, we need to improve traditional buck structure.Just based on above object, present invention improves over traditional buck structure and define a kind of new circuit structure, in this novel circuit structure, only need to add existing general power management control chip just can reach the object improving power factor (PF) and avoid stroboscopic phenomenon to produce simultaneously.
Fig. 4 is the structural representation of first embodiment of the invention, and Fig. 4 comprises: rectifier bridge 401, electric capacity 402, inductance 403, diode 404, electric capacity 405, switching tube 406, diode 407, inductance 408, electric capacity 409 and equivalent load 410.Wherein, described electric capacity 405, switching tube 406, diode 407, inductance 408, electric capacity 409 and equivalent load 410 form decompression transducer, and its connected mode is identical with buck structure traditional in Fig. 1.And electric capacity 402, inductance 403, diode 404, switching tube 406, diode 407, electric capacity 405 forms boost inverter.
Suppose that the voltage at electric capacity 402 two ends is V5, the voltage at electric capacity 405 two ends is V6, and electric capacity 409 both end voltage is V7.The course of work of circuit shown in Fig. 4 is as follows: when switching tube 406 is opened, the energy storage of voltage V5 is inside inductance 403, meanwhile, voltage V6 mono-aspect passes to electric capacity 409 and equivalent load 410 by inductance 408 part energy, on the other hand part energy is stored in inside inductance 408; When switching tube 406 turns off, the energy be stored in inside inductance 403 is delivered to electric capacity 405 place by diode 407, and meanwhile, the energy being stored in inductance 408 passes to electric capacity 409 and equivalent load 410 by diode 407.
In order to improve power factor, electric capacity 402 capacity is very little, only has filter action, and so the voltage at electric capacity 402 two ends is sine voltage signal V5; And electric capacity 409 capacity is comparatively large, have the effect of energy storage and filtering concurrently, electric capacity 409 two ends are relatively stable d. c. voltage signal V6.Key is, in circuit shown in Fig. 4, electric capacity 402, inductance 403, diode 404, switching tube 406, diode 407 and electric capacity 405 form boost inverter, makes the voltage V6 at electric capacity 405 two ends higher than the voltage V7 at electric capacity 409 two ends.
Fig. 5 is the structural representation of second embodiment of the invention, and Fig. 5 comprises: rectifier bridge 501, electric capacity 502, inductance 503, diode 504, diode 511, electric capacity 505, switching tube 506, diode 507, inductance 508, electric capacity 509, equivalent load 510.Equally, the electric capacity 505 in Fig. 5, switching tube 506, diode 507, inductance 508, electric capacity 509 and equivalent load 510 form decompression transducer, and its connected mode is identical with buck structure traditional in Fig. 1.And electric capacity 502, inductance 503, diode 504, diode 511, switching tube 506, diode 507 and electric capacity 505 form boost inverter.
Suppose that the voltage at electric capacity 502 two ends is V5, the voltage at electric capacity 505 two ends is V6, and electric capacity 509 both end voltage is V7.The course of work of circuit shown in Fig. 5 is as follows: when switching tube 506 is opened, the energy storage of voltage V5 is inside inductance 503, meanwhile, voltage V6 mono-aspect passes to electric capacity 509 and equivalent load 510 by inductance 508 part energy, on the other hand part energy is stored in inside inductance 508; When switching tube 506 turns off, the energy be stored in inside inductance 503 is delivered to electric capacity 505 place by diode 511, and meanwhile, the energy being stored in inductance 508 passes to electric capacity 509 and equivalent load 510 by diode 507.
The actual LED drive system that Fig. 6 builds in conjunction with multiple power source management control chip for circuit shown in Fig. 4, Fig. 6 comprises: the first rectifier bridge 601, first electric capacity 602, first inductance 603, first diode 604, second electric capacity 605, first switching tube 606, second diode 607, second inductance 608, 3rd electric capacity 609, power management control chip 617, wherein, the output of described first rectifier bridge 601 is connected with the two ends of described first electric capacity 602, the ungrounded end of described first electric capacity 602 is connected to one end of described first inductance 603, the other end of described first inductance 603 is connected to the P knot of described first diode 604, the N knot of described first diode 604 is connected to one end of described second inductance 608 respectively, the P knot of described second diode 607 and the drain electrode of described first switching tube 606, the other end of described second inductance 608 is connected to one end of described 3rd electric capacity 609, the N knot of described second diode 607 is connected to the other end of described 3rd electric capacity 609 and one end of described second electric capacity 605 respectively, the source ground of described first switching tube 606, the other end ground connection of described second electric capacity 605, the two ends of described 3rd electric capacity 609 are that external loading 611 is powered, described power management control chip 617 is multiple power source management control chip.
In Fig. 6, described power management control chip 617 is a common versatility power management control chips, and representing model has SG6858, LD7535, OB2263, RT7730 etc., function and the connected mode of above-mentioned versatility power management control chip are all well known to those skilled in the art.In the present embodiment, the peripheral support circuit of described power management control chip 617 comprises: the first auxiliary resistance 612, the 3rd auxiliary resistance 614, first optocoupler 616, first auxiliary capacitor 618, the 5th auxiliary resistance 619, the auxiliary winding 621 of the 6th auxiliary resistance 620, first and the first booster diode 622; wherein, described 3rd auxiliary resistance 614 is connected between the negative terminal of described external loading 611 and the 3rd electric capacity 609, described first optocoupler 616 is in parallel with described 3rd auxiliary resistance 614, described first optocoupler 616 feeds back to FB end and the GND end of described power management control chip 617, described power management control chip 617 holds output switch modulation signal to the grid of described first switching tube 606 by GATE, the vdd terminal of described power management control chip 617 is connected to one end of described first auxiliary resistance 612 respectively, the N knot of described first booster diode 622 and one end of described first auxiliary capacitor 618, the other end of described first auxiliary resistance 612 is connected to the anode of described external loading 611, described first auxiliary winding 621 ground connection of P knot by powering to described power management control chip 617 of described first booster diode 622, the other end ground connection of described first auxiliary capacitor 618, the SENSE end of described power management control chip 617 and RI end are respectively by described 6th auxiliary resistance 620 and described 5th auxiliary resistance 619 ground connection, the source electrode of described first switching tube 606 is connected to described SENSE and holds.
As shown in Figure 6, in side circuit, related resistors can be increased as required to change the parameter of circuit, such as, the peripheral support circuit of described power management control chip 617 also can comprise: the second auxiliary resistance 613, and described second auxiliary resistance 613 is connected with described first auxiliary resistance 612; 4th auxiliary resistance 615, described 4th auxiliary resistance 615 is connected with described first optocoupler 616.In addition, described first switching tube 606 can adopt switch MOS pipe, as N-type metal-oxide-semiconductor in Fig. 6.
Shown in Fig. 6 during circuit working, flow through the current signal of described external loading 611 after described 3rd auxiliary resistance 614 is sampled, described power management control chip 617 is fed back to by described first optocoupler 616, described power management control chip 617 output switch modulation signal to the grid of described first switching tube 606 controls it and turns on and off, with constant output current.
The voltage supposing described first electric capacity 602 two ends is V8, and the voltage at described second electric capacity 605 two ends is V9, and the voltage at described 3rd electric capacity 609 two ends is V10.Simplified timing diagram when Fig. 7 is system shown in Figure 6 work, as seen from Figure 7, in a power frequency period, the boost inverter be made up of described first electric capacity 602, first inductance 603, first diode 604, first switching tube 606, second diode 607 and the second electric capacity 605, makes voltage V9 be greater than output voltage V10 all the time; The decompression transducer be made up of described second electric capacity 605, first switching tube 606, second diode 607, second inductance 608, the 3rd electric capacity 609 and external loading 611, continuous operation within a power frequency period, all the time voltage V9 is had to the energy transferring of voltage V10, therefore make output current not exist waveform that working frequency ripple wave is shown in I4 in Fig. 7.
Meanwhile, because described second electric capacity 605 capacity relative is comparatively large, have the effect of filtering and energy storage concurrently, its voltage ripple is less.So, for the decompression transducer be made up of described second electric capacity 605, first switching tube 606, second diode 607, second inductance 608, the 3rd electric capacity 609 and external loading 611, the modulation signal that described power management control chip 617 exports, its frequency f is constant, change in duty cycle is relatively little, and the service time change of described first switching tube 606 is also relatively little.Secondly, for the boost inverter be made up of described first electric capacity 602, first inductance 603, first diode 604, first switching tube 606, second diode 607 and the second electric capacity 605, according to Lenz's law
, input current can follow the change of input voltage, and input current envelope near sinusoidal is shown in the waveform of I3 in Fig. 7, and then improves power factor.
The actual LED drive system that Fig. 8 builds in conjunction with multiple power source management control chip for circuit shown in Fig. 5, shown in Fig. 8, circuit comprises: the second rectifier bridge 801, 4th electric capacity 802, 3rd inductance 803, 3rd diode 804, 5th electric capacity 805, second switch pipe 806, 4th diode 807, 5th diode 822 the 4th inductance 808, 6th electric capacity 809 and second source management control chip 817, wherein, the output of described second rectifier bridge 801 is connected with the two ends of described 4th electric capacity 802, the ungrounded end of described 4th electric capacity 802 is connected to one end of described 3rd inductance 803, the other end of described 3rd inductance 803 is connected to the P knot of described 3rd diode 804 and the P knot of described 5th diode 822 respectively, the N knot of described 3rd diode 804 is connected to one end of described 4th inductance 808 respectively, the P knot of described 4th diode 807 and the drain electrode of described second switch pipe 806, the other end of described 4th inductance 808 is connected to one end of described 6th electric capacity 809, the N knot of described 4th diode 807 is connected to the N knot of described 5th diode 822 respectively, the other end of described 6th electric capacity 809 and one end of described 5th electric capacity 805, the source ground of described second switch pipe 806, the other end ground connection of described 5th electric capacity 805, the two ends of described 6th electric capacity 809 are that the second external loading 811 is powered, described second source management control chip 817 is multiple power source management control chip.
In Fig. 8, described second source management control chip 817 is a common versatility power management control chips, represent model and have SG6858, LD7535, OB2263, RT7730 etc., function and the connected mode of above-mentioned versatility power management control chip are all well known to those skilled in the art.In the present embodiment, the peripheral support circuit of described second source management control chip 817 comprises: the 7th auxiliary resistance 812, the auxiliary winding 821 of the 9th auxiliary resistance 814, second optocoupler 816, second auxiliary capacitor the 818, the 11 auxiliary resistance the 819, the 12 auxiliary resistance 820, second and the second booster diode 823; wherein, described 9th auxiliary resistance 814 is connected between described second external loading 811 and the negative terminal of the 6th electric capacity 809, described second optocoupler 816 is in parallel with described 9th auxiliary resistance 814, described second optocoupler 816 feeds back to FB end and the GND end of described second source management control chip 817, described second source management control chip 817 holds output switch modulation signal to the grid of described second switch pipe 806 by GATE, the vdd terminal of described second source management control chip 817 is connected to one end of described 7th auxiliary resistance 812 respectively, the N knot of described second booster diode 823 and one end of described second auxiliary capacitor 818, the other end of described 7th auxiliary resistance 812 is connected to the anode of described second external loading 811, described second auxiliary winding 821 ground connection of P knot by powering to described second source management control chip 817 of described second booster diode 823, the other end ground connection of described second auxiliary capacitor 818, the SENSE end of described second source management control chip 817 and RI end are respectively by described 12 auxiliary resistance 820 and described 11 auxiliary resistance 819 ground connection, the source electrode of described second switch pipe 806 is connected to described SENSE and holds.
As shown in Figure 8, in side circuit, related resistors can be increased as required to change the parameter of circuit, such as, the peripheral support circuit of described power management control chip 817 also can comprise: the 8th auxiliary resistance 813, and described 8th auxiliary resistance 813 is connected with described 7th auxiliary resistance 812; Tenth auxiliary resistance 815, described tenth auxiliary resistance 815 is connected with described second optocoupler 816.In addition, described second switch pipe can adopt switch MOS pipe, as N-type metal-oxide-semiconductor in Fig. 8.
The difference of circuit shown in Fig. 8 and Fig. 6 is, adds described 5th diode 822.In Fig. 8, when described second switch pipe 806 turns off, the energy that described 3rd inductance 803 stores can be directly released in described 5th electric capacity 805 by described 5th diode 822.And in Fig. 6, when described first switching tube 606 turns off, the energy that described first inductance 603 stores then needs just can be discharged in described second electric capacity 605 by described first diode 604 and the second diode 607.Therefore, in actual applications, Fig. 8 circuit is compared Fig. 6 circuit and will be had higher efficiency.
More than by description of listed embodiment, the basic ideas and basic principles of the present invention are set forth.But the present invention is never limited to above-mentioned listed execution mode, every equivalent variations, the improvement done based on technical scheme of the present invention and deliberately become of inferior quality behavior, all should belong to protection scope of the present invention.
Claims (8)
1. a High Power Factor is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit comprises: the first rectifier bridge (601), first electric capacity (602), first inductance (603), first diode (604), second electric capacity (605), first switching tube (606), second diode (607), second inductance (608), 3rd electric capacity (609) and power management control chip (617), wherein, the output of described first rectifier bridge (601) is connected with the two ends of described first electric capacity (602), the ungrounded end of described first electric capacity (602) is connected to one end of described first inductance (603), the other end of described first inductance (603) is connected to the P knot of described first diode (604), the N knot of described first diode (604) is connected to one end of described second inductance (608) respectively, the P knot of described second diode (607) and the drain electrode of described first switching tube (606), the other end of described second inductance (608) is connected to one end of described 3rd electric capacity (609), the N knot of described second diode (607) is connected to the described other end of the 3rd electric capacity (609) and one end of described second electric capacity (605) respectively, the source ground of described first switching tube (606), the other end ground connection of described second electric capacity (605), the two ends of described 3rd electric capacity (609) are external loading (611) power supply, described power management control chip (617) is multiple power source management control chip, the model of described power management control chip (617) is SG6858, LD7535, OB2263 or RT7730, the peripheral support circuit of described power management control chip (617) comprising: the first auxiliary resistance (612), 3rd auxiliary resistance (614), first optocoupler (616), first auxiliary capacitor (618), 5th auxiliary resistance (619), 6th auxiliary resistance (620), first auxiliary winding (621) and the first booster diode (622), wherein, described 3rd auxiliary resistance (614) is connected between the negative terminal of described external loading (611) and the 3rd electric capacity (609), described first optocoupler (616) is in parallel with described 3rd auxiliary resistance (614), described first optocoupler (616) feeds back to FB end and the GND end of described power management control chip (617), described power management control chip (617) holds output switch modulation signal to the grid of described first switching tube (606) by GATE, the vdd terminal of described power management control chip (617) is connected to one end of described first auxiliary resistance (612) respectively, the N knot of described first booster diode (622) and one end of described first auxiliary capacitor (618), the other end of described first auxiliary resistance (612) is connected to the anode of described external loading (611), described first auxiliary winding (621) ground connection of P knot by powering to described power management control chip (617) of described first booster diode (622), the other end ground connection of described first auxiliary capacitor (618), the SENSE end of described power management control chip (617) and RI end are respectively by described 6th auxiliary resistance (620) and described 5th auxiliary resistance (619) ground connection, the source electrode of described first switching tube (606) is connected to described SENSE and holds.
2. High Power Factor according to claim 1 is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit also comprises: the second auxiliary resistance (613), and described second auxiliary resistance (613) is connected with described first auxiliary resistance (612).
3. High Power Factor according to claim 1 is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit also comprises: the 4th auxiliary resistance (615), and described 4th auxiliary resistance (615) is connected with described first optocoupler (616).
4. High Power Factor according to claim 1 is without the LED drive circuit of stroboscopic, it is characterized in that, described first switching tube (606) is switch MOS pipe.
5. a High Power Factor is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit comprises: the second rectifier bridge (801), 4th electric capacity (802), 3rd inductance (803), 3rd diode (804), 5th electric capacity (805), second switch pipe (806), 4th diode (807), 5th diode (822) the 4th inductance (808), 6th electric capacity (809) and second source management control chip (817), wherein, the output of described second rectifier bridge (801) is connected with the two ends of described 4th electric capacity (802), the ungrounded end of described 4th electric capacity (802) is connected to one end of described 3rd inductance (803), the other end of described 3rd inductance (803) is connected to the P knot of described 3rd diode (804) and the P knot of described 5th diode (822) respectively, the N knot of described 3rd diode (804) is connected to one end of described 4th inductance (808) respectively, the P knot of described 4th diode (807) and the drain electrode of described second switch pipe (806), the other end of described 4th inductance (808) is connected to one end of described 6th electric capacity (809), the N knot of described 4th diode (807) is connected to the N knot of described 5th diode (822) respectively, the other end of described 6th electric capacity (809) and one end of described 5th electric capacity (805), the source ground of described second switch pipe (806), the other end ground connection of described 5th electric capacity (805), the two ends of described 6th electric capacity (809) are the second external loading (811) power supply, described second source management control chip (817) is multiple power source management control chip, the model of described second source management control chip (817) is SG6858, LD7535, OB2263 or RT7730, the peripheral support circuit of described second source management control chip (817) comprising: the 7th auxiliary resistance (812), 9th auxiliary resistance (814), second optocoupler (816), second auxiliary capacitor (818), 11 auxiliary resistance (819), 12 auxiliary resistance (820), second auxiliary winding (821) and the second booster diode (823), wherein, described 9th auxiliary resistance (814) is connected between the negative terminal of described second external loading (811) and the 6th electric capacity (809), described second optocoupler (816) is in parallel with described 9th auxiliary resistance (814), described second optocoupler (816) feeds back to FB end and the GND end of described second source management control chip (817), described second source management control chip (817) holds output switch modulation signal to the grid of described second switch pipe (806) by GATE, the vdd terminal of described second source management control chip (817) is connected to one end of described 7th auxiliary resistance (812) respectively, the N knot of described second booster diode (823) and one end of described second auxiliary capacitor (818), the other end of described 7th auxiliary resistance (812) is connected to the anode of described second external loading (811), described second auxiliary winding (821) ground connection of P knot by powering to described second source management control chip (817) of described second booster diode (823), the other end ground connection of described second auxiliary capacitor (818), the SENSE end of described second source management control chip (817) and RI end are respectively by described 12 auxiliary resistance (820) and described 11 auxiliary resistance (819) ground connection, the source electrode of described second switch pipe (806) is to described SENSE end.
6. High Power Factor according to claim 5 is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit also comprises: the 8th auxiliary resistance (813), and described 8th auxiliary resistance (813) is connected with described 7th auxiliary resistance (812).
7. High Power Factor according to claim 5 is without the LED drive circuit of stroboscopic, it is characterized in that, this drive circuit also comprises: the tenth auxiliary resistance (815), and described tenth auxiliary resistance (815) is connected with described second optocoupler (816).
8. High Power Factor according to claim 5 is without the LED drive circuit of stroboscopic, it is characterized in that, described second switch pipe (806) is switch MOS pipe.
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| CN201410048087.XA CN103763841B (en) | 2014-02-12 | 2014-02-12 | High Power Factor is without the LED drive circuit of stroboscopic |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410048087.XA CN103763841B (en) | 2014-02-12 | 2014-02-12 | High Power Factor is without the LED drive circuit of stroboscopic |
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| CN103763841A CN103763841A (en) | 2014-04-30 |
| CN103763841B true CN103763841B (en) | 2015-11-18 |
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| CN104159357B (en) * | 2014-06-20 | 2016-03-30 | 东南大学 | The control method of a kind of LED illumination circuit output current effective value and power factor and control system thereof |
| CN104507220B (en) * | 2014-12-16 | 2017-01-11 | 苏州东微半导体有限公司 | High-efficiency LED (Light Emitting Diode) drive control circuit |
| CN112092727B (en) * | 2020-09-16 | 2022-03-18 | 广州小鹏汽车科技有限公司 | Backlight drive circuit and vehicle |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340760A (en) * | 2007-07-06 | 2009-01-07 | Nec液晶技术株式会社 | Light-emitting control circuit, light-emitting control method, plane illumination device and liquid crystal display device with the plane illumination device |
| CN103260289A (en) * | 2012-02-16 | 2013-08-21 | 欧司朗股份有限公司 | Light-emitting diode (LED) driver and lighting device with same |
| CN203840586U (en) * | 2014-02-12 | 2014-09-17 | 苏州智浦芯联电子科技有限公司 | LED drive circuit with high power factor and without strobe |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7579818B2 (en) * | 2005-07-28 | 2009-08-25 | Semiconductor Components Industries, L.L.C. | Current regulator and method therefor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101340760A (en) * | 2007-07-06 | 2009-01-07 | Nec液晶技术株式会社 | Light-emitting control circuit, light-emitting control method, plane illumination device and liquid crystal display device with the plane illumination device |
| CN103260289A (en) * | 2012-02-16 | 2013-08-21 | 欧司朗股份有限公司 | Light-emitting diode (LED) driver and lighting device with same |
| CN203840586U (en) * | 2014-02-12 | 2014-09-17 | 苏州智浦芯联电子科技有限公司 | LED drive circuit with high power factor and without strobe |
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Address after: Suzhou City, Jiangsu province 215000 Industrial Park Suzhou Xinping Street No. 388 Suzhou innovation park off the 23 building 3 layer 09, 10 unit Patentee after: SUZHOU INTELLI-CHIPLINK ELECTRONICS TECHNOLOGY CO., LTD. Address before: Suzhou City, Jiangsu province 215000 Industrial Park Suzhou Xinping Street No. 388 Suzhou innovation park off the 23 building 3 layer 09, 10 unit Patentee before: Suzhou Zhipu Xinlian Electronic Technology Co., Ltd. |