CN203039971U - Novel lamp drive circuit - Google Patents
Novel lamp drive circuit Download PDFInfo
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- CN203039971U CN203039971U CN 201220723740 CN201220723740U CN203039971U CN 203039971 U CN203039971 U CN 203039971U CN 201220723740 CN201220723740 CN 201220723740 CN 201220723740 U CN201220723740 U CN 201220723740U CN 203039971 U CN203039971 U CN 203039971U
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- 230000001681 protective effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract 4
- 238000004134 energy conservation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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Abstract
The utility model discloses a novel lamp drive circuit which comprises an EMI filter and a full-bridge rectification circuit. The novel lamp drive circuit is characterized in that the drive circuit further comprises a power factor correction circuit, a DC/DC conversion circuit, a constant current drive circuit, an auxiliary power supply and a protection circuit; the output end of the EMI filter is connected with the input end of the full-bridge rectification circuit; the input end of the EMI filter is connected with one-way alternating current of 88 to 264V; the output end of the full-bridge rectification circuit is connected with the input end of the power factor correction circuit; the output end of the power factor correction circuit is connected with the input end of the DC/DC conversion circuit; the output end of the DC/DC conversion circuit is connected with the input end of the constant current drive circuit; the output end of the constant current drive circuit is connected with an LED lamp; and the auxiliary power supply and the protection circuit are respectively connected with the power factor correction circuit, the DC/DC conversion circuit and the constant current drive circuit.
Description
Technical field
The utility model relates to lamp driving circuit, especially relates to a kind of drive circuit of LED street lamp.
Background technology
As everyone knows, the outstanding advantage of LED street lamp is energy-conservation, for energy-conservation maximization, also in order to satisfy the light modulation needs of street lamp, led drive circuit need be changed between fully loaded and underloading, the full load efficiency of traditional high-power LED drive circuit has only about 85%, efficient is lower during underloading, these all do not meet the growth requirement of LED lighting, along with LED street lamp large-scale application in road lighting, harmonic wave just seems very necessary to the pollution problem of electrical network, is necessary so add power factor correction (PFC) circuit, but the efficient that is operated in circuit of power factor correction under the light condition can descend a lot, influenced whole power-efficient, traditional boost type pfc circuit adopts big inductance to finish and boosts, and is unfavorable for heat radiation, temperature can be very high, can exert an influence to the luminous of LED.
The utility model has carried out useful improvement in order to overcome above-mentioned defective.
The utility model content
The purpose of this utility model is to solve above-mentioned deficiency of the prior art, and a kind of light drive circuit is provided.
To achieve these goals, the utility model is by the following technical solutions:
A kind of light drive circuit, comprise electromagnetic interface filter, full bridge rectifier, its special character is: described drive circuit also comprises circuit of power factor correction, the DC/DC translation circuit, constant-current drive circuit, accessory power supply and protective circuit, described electromagnetic interface filter output is connected with the input of full bridge rectifier, described electromagnetic interface filter input is connected with unidirectional 88～264V alternating current, described full bridge rectifier output is connected with the input of circuit of power factor correction, described circuit of power factor correction output is connected with the input of DC/DC translation circuit, the output of described DC/DC translation circuit is connected with the input of constant-current drive circuit, the output of described constant-current drive circuit is connected with the LED lamp, described accessory power supply and protective circuit respectively with circuit of power factor correction, the DC/DC translation circuit is connected with constant-current drive circuit;
Further, described circuit of power factor correction comprises active PFC circuit and control circuit I, the output of described active PFC circuit and control circuit I form closed loop, described active PFC circuit is alternating expression Active Power Factor Correction controller, and the switching tube in the described circuit of power factor correction is subjected to the control of alternating expression Active Power Factor Correction controller; Described circuit of power factor correction output 390V voltage;
Further, described DC/DC translation circuit comprises half-bridge logical link control (LLC) resonant circuit and control circuit II, the output of described half-bridge logical link control (LLC) resonant circuit and control circuit II form closed loop, described half-bridge logical link control (LLC) resonant circuit comprises half-bridge switch circuit, resonant network circuit, transformer and transformer secondary output rectifier diode, the output of described circuit of power factor correction is connected with the half-bridge logical link control (LLC) resonant circuit, described DC/DC translation circuit output burning voltage 48V, electric current 6.25A;
Further, described constant-current drive circuit comprises led drive circuit and control circuit III, the output of described led drive circuit and control circuit III form closed loop, described led drive circuit is 6 tunnel constant currents outputs, can be the series and parallel circuit power supply that a plurality of large power white light LEDs are formed at output.
The beneficial effects of the utility model: the utility model is owing to adopted the half-bridge logical link control (LLC) resonant circuit, make switching loss reduce, the heat of generation reduces, and has improved operating efficiency and has solved heat dissipation problem, reduce the light rate of LED, increased the useful life of LED light fixture.
Description of drawings
Fig. 1 is the circuit structure diagram of the utility model embodiment.
Embodiment
Be further described below in conjunction with accompanying drawing and the utility model of embodiment.
Embodiment of the present utility model is with reference to shown in Figure 1; a kind of light drive circuit; comprise electromagnetic interface filter; full bridge rectifier; described drive circuit also comprises circuit of power factor correction; the DC/DC translation circuit; constant-current drive circuit; accessory power supply and protective circuit; described electromagnetic interface filter output is connected with the input of full bridge rectifier; described electromagnetic interface filter input is connected with unidirectional 88～264V alternating current; described full bridge rectifier output is connected with the input of circuit of power factor correction; described circuit of power factor correction output is connected with the input of DC/DC translation circuit; the output of described DC/DC translation circuit is connected with the input of constant-current drive circuit; the output of described constant-current drive circuit is connected with the LED lamp, described accessory power supply and protective circuit respectively with circuit of power factor correction; the DC/DC translation circuit is connected with constant-current drive circuit.
Circuit of power factor correction part: comprise active PFC circuit and control circuit I, the output of described active PFC circuit and control circuit I form closed loop, this part is based on the power factor correction of NCP1631, NCP1631 is alternating expression Active Power Factor Correction controller, the controlled chip controls of switching tube in the two-way BOOST circuit, and 180 phase differences of spending are arranged.Current work in the inductance combines the advantage of continuous conduction mode and critical conduction mode at the critical conduction mode of clamper frequency, has reduced electromagnetic interference and output current line glass.This circuit of power factor correction has multiple auxiliary circuits such as output overvoltage under-voltage protecting circuit, the functional circuit of crossing flow restriction, surge current detection and soft start.Output voltage is 390V, and voltage ripple is 3%, and power factor is close to 1.
DC/DC translation circuit part: comprise half-bridge logical link control (LLC) resonant circuit and control circuit II; the output of described half-bridge logical link control (LLC) resonant circuit and control circuit II form closed loop; one-level connects the half-bridge logical link control (LLC) resonant circuit behind the pfc circuit; comprise the half-bridge switch circuit; the resonant network circuit; transformer and transformer secondary output rectifier diode; the control circuit of half-bridge LLC is selected the L6599 chip; upper level PFC output voltage 390V is as the input of translation circuit; control circuit provides the driving signal of switching tube; the output burning voltage is 48V; electric current is 6.25A, and the driving chip has the high-performance overcurrent protection function provides comprehensive overload and short-circuit protection circuit.
Constant-current drive circuit part: comprise led drive circuit and control circuit III, the output of described led drive circuit and control circuit III form closed loop, the ED drive circuit is 6 tunnel constant currents outputs, can be the series and parallel circuit power supply that a plurality of large power white light LEDs are formed at output.
The above execution mode has only been expressed a kind of execution mode of the present utility model, but can not therefore be interpreted as the restriction to the utility model scope.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection range of the present utility model.
Claims (4)
1. light drive circuit; comprise electromagnetic interface filter; full bridge rectifier; it is characterized in that: described drive circuit also comprises circuit of power factor correction; the DC/DC translation circuit; constant-current drive circuit; accessory power supply and protective circuit; described electromagnetic interface filter output is connected with the input of full bridge rectifier; described electromagnetic interface filter input is connected with unidirectional 88～264V alternating current; described full bridge rectifier output is connected with the input of circuit of power factor correction; described circuit of power factor correction output is connected with the input of DC/DC translation circuit; the output of described DC/DC translation circuit is connected with the input of constant-current drive circuit; the output of described constant-current drive circuit is connected with the LED lamp, described accessory power supply and protective circuit respectively with circuit of power factor correction; the DC/DC translation circuit is connected with constant-current drive circuit.
2. a kind of light drive circuit according to claim 1, it is characterized in that: described circuit of power factor correction comprises active PFC circuit and control circuit I, the output of described active PFC circuit and control circuit I form closed loop, described active PFC circuit is alternating expression Active Power Factor Correction controller, and the switching tube in the described circuit of power factor correction is subjected to the control of alternating expression Active Power Factor Correction controller; Described circuit of power factor correction output 390V voltage.
3. a kind of light drive circuit according to claim 2, it is characterized in that: described DC/DC translation circuit comprises half-bridge logical link control (LLC) resonant circuit and control circuit II, the output of described half-bridge logical link control (LLC) resonant circuit and control circuit II form closed loop, described half-bridge logical link control (LLC) resonant circuit comprises half-bridge switch circuit, resonant network circuit, transformer and transformer secondary output rectifier diode, the output of described circuit of power factor correction is connected with the half-bridge logical link control (LLC) resonant circuit, described DC/DC translation circuit output burning voltage 48V, electric current 6.25A.
4. a kind of light drive circuit according to claim 3, it is characterized in that: described constant-current drive circuit comprises led drive circuit and control circuit III, the output of described led drive circuit and control circuit III form closed loop, described led drive circuit is 6 tunnel constant currents outputs, can be the series and parallel circuit power supply that a plurality of large power white light LEDs are formed at output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723740 CN203039971U (en) | 2012-12-26 | 2012-12-26 | Novel lamp drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220723740 CN203039971U (en) | 2012-12-26 | 2012-12-26 | Novel lamp drive circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203039971U true CN203039971U (en) | 2013-07-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220723740 Expired - Fee Related CN203039971U (en) | 2012-12-26 | 2012-12-26 | Novel lamp drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203039971U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515365A (en) * | 2016-02-03 | 2016-04-20 | 广东工业大学 | LLC converter digital soft start method |
| CN105763034A (en) * | 2016-03-30 | 2016-07-13 | 广东工业大学 | Digital soft start method of full-bridge LLC converter |
| CN107134262A (en) * | 2017-05-12 | 2017-09-05 | 惠州三华工业有限公司 | Low-power consumption display device |
| CN110504847A (en) * | 2018-05-18 | 2019-11-26 | 龙海特尔福汽车电子研究所有限公司 | A kind of AC-DC converter based on PFC+LLC topology |
| CN110880294A (en) * | 2019-12-10 | 2020-03-13 | 深圳创维－Rgb电子有限公司 | OLED driving power supply and electronic product |
-
2012
- 2012-12-26 CN CN 201220723740 patent/CN203039971U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105515365A (en) * | 2016-02-03 | 2016-04-20 | 广东工业大学 | LLC converter digital soft start method |
| CN105515365B (en) * | 2016-02-03 | 2018-06-12 | 广东工业大学 | A kind of LLC converters digital soft start method |
| CN105763034A (en) * | 2016-03-30 | 2016-07-13 | 广东工业大学 | Digital soft start method of full-bridge LLC converter |
| CN105763034B (en) * | 2016-03-30 | 2018-03-06 | 广东工业大学 | A kind of full-bridge LLC converters digital soft start method |
| CN107134262A (en) * | 2017-05-12 | 2017-09-05 | 惠州三华工业有限公司 | Low-power consumption display device |
| CN110504847A (en) * | 2018-05-18 | 2019-11-26 | 龙海特尔福汽车电子研究所有限公司 | A kind of AC-DC converter based on PFC+LLC topology |
| CN110880294A (en) * | 2019-12-10 | 2020-03-13 | 深圳创维－Rgb电子有限公司 | OLED driving power supply and electronic product |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BINZHOU ZHONGJIE NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WANG XIANGJIE Effective date: 20130927 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130927 Address after: 256500 Boxing economic and Technological Development Zone, Shandong Patentee after: CSE SOLAR TECHNOLOGY CO., LTD. Address before: 201 room 256500, block F, Boxing economic and Technological Development Zone, Shandong Patentee before: Wang Xiangjie |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20151226 |
|
| EXPY | Termination of patent right or utility model |