CN202857065U - Novel LED isolation constant-current drive circuit having active power factor correction function - Google Patents
Novel LED isolation constant-current drive circuit having active power factor correction function Download PDFInfo
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- CN202857065U CN202857065U CN 201220502720 CN201220502720U CN202857065U CN 202857065 U CN202857065 U CN 202857065U CN 201220502720 CN201220502720 CN 201220502720 CN 201220502720 U CN201220502720 U CN 201220502720U CN 202857065 U CN202857065 U CN 202857065U
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Abstract
The utility model relates to a novel LED isolation constant-current drive circuit having an active power factor correction function. The novel LED isolation constant-current drive circuit having the active power factor correction function includes an over-voltage and over-current protection circuit, a rectifying circuit, an EMI filtering circuit, an IC chip, an IC chip peripheral circuit, a power switch circuit, an isolation secondary-level buck circuit, a high-frequency rectifying circuit, an output filtering circuit and an LED array. The over-voltage and over-current protection circuit is connected with the IC chip through the rectifying circuit and the EMI filtering circuit; and the IC chip is connected with the LED array through the power switch circuit, the isolation secondary-level buck circuit, the high-frequency rectifying circuit and the output filtering circuit. The novel LED isolation constant-current drive circuit having the active power factor correction function of the utility model has the advantages of simple and reasonable circuit structure, greatly saved system cost and dimension, realized high power factor and low-harmonic distortion, outputted high-precision constant-current LED drive current, LED short-circuit and open-circuit protection, and automatic restart function.
Description
Technical field
The utility model relates to a kind of novel Active Power Factor Correction LED isolation constant-current drive circuit that carries.
Background technology
Existing led drive circuit active power factor alignment circuit accounts for a big chunk cost in the power circuit, and circuit structure is also very complicated, has so just increased production cost, is unfavorable for applying, and also is unfavorable for energy-conserving and environment-protective.
The utility model content
For problems of the prior art, the purpose of this utility model is to provide a kind of novel technical scheme that carries Active Power Factor Correction LED isolation constant-current drive circuit.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries; comprise over-voltage over-current protection circuit, rectification circuit, EMI filter circuit, IC chip, IC chip periphery circuit, power switch circuit, the secondary reduction voltage circuit of isolation, high-frequency rectification circuit, output filter circuit and led array; over-voltage over-current protection circuit links to each other with the IC chip with the EMI filter circuit through rectification circuit, the IC chip through power switch circuit, isolate secondary reduction voltage circuit, high-frequency rectification circuit and output filter circuit and link to each other with led array.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described over-voltage over-current protection circuit is comprised of overcurrent protection resettable fuse WHPTC and overvoltage protection piezo-resistance MY.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described rectification circuit is comprised of the rectifier bridge that diode D1-D4 consists of.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described EMI filter circuit is made of capacitor C 1, capacitor C 2 and inductance L 1.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described IC chip periphery circuit is cooperatively interacted by resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 4, capacitor C 5, diode D5 and inductance L 3 and forms.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described power switch circuit is made of resistance R 2, capacitor C 3, field effect transistor TV, diode D6, capacitor C 6, resistance R 7 and inductance L 2.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, the secondary reduction voltage circuit of described isolation is comprised of inductance L 4, and high-frequency rectification circuit is made of diode D7, and output filter circuit is made of capacitor C 7.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described led array is formed by n LED serial connection.
The described novel Active Power Factor Correction LED isolation constant-current drive circuit that carries, described IC chip has adopted the BP3309 chip.
The utlity model has following advantage: 1. circuit structure is succinctly reasonable; 2. saved greatly system cost and volume, 3. realized High Power Factor and low harmonics distortion, 4. the high-precision constant-current LED drive current of output; 5. has the protection of LED short/open, 6. the autoboot function.
Description of drawings
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is circuit theory diagrams of the present utility model;
Among the figure: the 1-over-voltage over-current protection circuit; The 2-rectification circuit; 3-EMI filter circuit; The 4-IC chip; The 5-power switch circuit; 6-isolates secondary reduction voltage circuit; The 7-high-frequency rectification circuit; The 8-output filter circuit; The 9-LED array.
Embodiment
Below in conjunction with Figure of description the utility model is described further:
The novel Active Power Factor Correction LED isolation constant-current drive circuit that carries; comprise over-voltage over-current protection circuit 1, rectification circuit 2, EMI filter circuit 3, IC chip 4, IC chip periphery circuit, power switch circuit 5, the secondary reduction voltage circuit 6 of isolation, high-frequency rectification circuit 7, output filter circuit 8 and led array 9; over-voltage over-current protection circuit 1 links to each other with IC chip 4 with EMI filter circuit 3 through rectification circuit 2, and IC chip 4 links to each other with led array 9 with output filter circuit 8 through power switch circuit 5, the secondary reduction voltage circuit 6 of isolation, high-frequency rectification circuit 7.
Wherein over-voltage over-current protection circuit is comprised of overcurrent protection resettable fuse WHPTC and overvoltage protection piezo-resistance MY; rectification circuit is comprised of the rectifier bridge that diode D1-D4 consists of; the EMI filter circuit is by capacitor C 1; capacitor C 2 and inductance L 1 consist of; IC chip periphery circuit is by resistance R 1; resistance R 2; resistance R 3; resistance R 4; resistance R 5; resistance R 6; capacitor C 4; capacitor C 5; diode D5 and inductance L 3 cooperatively interact and form; power switch circuit is by resistance R 2; capacitor C 3; field effect transistor TV; diode D6; capacitor C 6; resistance R 7 and inductance L 2 consist of; isolating secondary reduction voltage circuit is comprised of inductance L 4; high-frequency rectification circuit is made of diode D7; output filter circuit is made of capacitor C 7, and led array is formed by n LED serial connection.
The IC chip that the utility model adopts is the BP3309 chip, integrates active PFC circuit, frequency oscillation circuit, former limit feedback constant flow control circuit and over-voltage and over-current circuit, can realize very high power factor and very low total harmonic distortion.
Overcurrent protection resettable fuse WHPTC is connected on ac power input end, overvoltage protection piezo-resistance MY also is listed in ac power input end, export after the rectifier bridge rectification of power supply through diode D1-D4 formation, capacitor C 1 is connected in parallel on output, diode D2 output connects inductance L 1 one ends, inductance L 1 other end connects respectively capacitor C 2 one ends, resistance R 1 one ends, resistance R 2 one ends, capacitor C 6 one ends, resistance R 7 one ends and inductance L 3 one ends, capacitor C 2 other ends connect respectively the negative pole of diode D4, resistance R 3 one ends, resistance R 4 one ends, capacitor C 3 one ends, IC chip pin 2, capacitor C 4 one ends, resistance R 5 one ends, capacitor C 5 one ends and inductance L 3 one ends, resistance R 1 other end contact resistance R3 other end and IC chip pin 4, resistance R 4 other ends connect IC chip pin 1, capacitor C 3 other end contact resistance R2 other ends, field effect transistor TV grid and IC chip pin 7, capacitor C 4 connects IC chip pin 3, resistance R 5 other ends connect IC chip pin 5 and resistance R 6 other ends, capacitor C 5 other ends connect IC chip pin 6 and diode D5 negative pole, the anodal contact resistance R6 other end of diode D5 and inductance L 3 other ends, IC chip pin 8 connects field effect transistor TV source electrode, field effect transistor TV drain electrode connects diode D6 positive pole and inductance L 2 other ends, and the diode D6 other end connects respectively capacitor C 6 other ends and resistance R 7 other ends; Inductance L 2 and inductance L 3 are by iron core and inductance L 4 couplings, and inductance L 4 one ends link to each other with diode D7 is anodal, and inductance L 4 other ends link to each other with the negative pole of capacitor C 7 negative poles and led array, and capacitor C 7 positive poles link to each other with the positive pole of diode D7 negative pole and led array respectively.
Operation principle: electric main is connected with the bridge rectifier input that is made of diode D1-D4 with overvoltage protection piezo-resistance MY through overcurrent protection resettable fuse WHPTC; carry out EMI filtering through linking to each other with the electromagnetic interface filter circuit behind the bridge rectifier of 4 rectifier diodes; it accomplishes to prevent that the civil power clutter from entering the effect that enters utility grid with the switching circuit high frequency; give IC chip 4 pin by filtered positive electricity through resistance R 1; line voltage sample supplying power for input end is simultaneously through resistance R 3 and the shunting of ground connection negative pole; IC chip 2 pin directly are connected with the ground connection negative pole; IC chip 3 pin loop compensation ends are connected with the ground connection negative pole through building-out capacitor C4; IC chip 1 pin current sample end is connected with the ground connection negative pole through current sampling resistor R4; IC chip 5 pin subsidy winding feedback end is connected with the ground connection negative pole through resistance R 5; the anodal contact resistance R6 of L3 feedback coil one end and switching diode D5; the feedback inductance L3 other end directly is connected with the ground connection negative pole; IC chip 6 pin power ends are connected with ground connection negative pole connecting valve diode D5 negative pole end and are connected capacitor C 5 with the earth terminal negative pole simultaneously; IC chip 7 pin start ends link to each other with field effect transistor TV grid and anodal contact resistance R2; be connected capacitor C 3 with the ground connection negative pole; IC chip 8 pin pulse output ends link to each other with field effect transistor TV source electrode; inductance L 2 other ends that field effect transistor TV drain electrode is connected with positive terminal link to each other with diode D6 positive terminal; diode D6 negative pole end and positive terminal link to each other respectively capacitor C 6 and resistance R 7; the power supply output high-frequency transformation is finished by inductance L 4, through high-frequency rectification diode D7; be supplied to the LED load after the filter capacitor C7 filtering.
The LED that the utility model utilization carries APFC drives the BP3309 chip, has solved the difficult problem of the high circuit complexity of cost, and the batch production cost is low, technique is simple.
Claims (9)
1. the novel Active Power Factor Correction LED that carries isolates constant-current drive circuit; it is characterized in that comprising over-voltage over-current protection circuit, rectification circuit, EMI filter circuit, IC chip, IC chip periphery circuit, power switch circuit, the secondary reduction voltage circuit of isolation, high-frequency rectification circuit, output filter circuit and led array; over-voltage over-current protection circuit links to each other with the IC chip with the EMI filter circuit through rectification circuit, the IC chip through power switch circuit, isolate secondary reduction voltage circuit, high-frequency rectification circuit and output filter circuit and link to each other with led array.
2. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described over-voltage over-current protection circuit is comprised of overcurrent protection resettable fuse WHPTC and overvoltage protection piezo-resistance MY.
3. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described rectification circuit is comprised of the rectifier bridge that diode D1-D4 consists of.
4. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described EMI filter circuit is made of capacitor C 1, capacitor C 2 and inductance L 1.
5. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described IC chip periphery circuit is cooperatively interacted by resistance R 1, resistance R 2, resistance R 3, resistance R 4, resistance R 5, resistance R 6, capacitor C 4, capacitor C 5, diode D5 and inductance L 3 to form.
6. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described power switch circuit is made of resistance R 2, capacitor C 3, field effect transistor TV, diode D6, capacitor C 6, resistance R 7 and inductance L 2.
7. the novel Active Power Factor Correction LED that carries according to claim 1 isolates constant-current drive circuit, it is characterized in that the secondary reduction voltage circuit of described isolation is comprised of inductance L 4, high-frequency rectification circuit is made of diode D7, and output filter circuit is made of capacitor C 7.
8. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described led array is formed by n LED serial connection.
9. the novel Active Power Factor Correction LED isolation constant-current drive circuit that carries according to claim 1 is characterized in that described IC chip has adopted the BP3309 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502720 CN202857065U (en) | 2012-09-27 | 2012-09-27 | Novel LED isolation constant-current drive circuit having active power factor correction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220502720 CN202857065U (en) | 2012-09-27 | 2012-09-27 | Novel LED isolation constant-current drive circuit having active power factor correction function |
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| Publication Number | Publication Date |
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| CN202857065U true CN202857065U (en) | 2013-04-03 |
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| CN 201220502720 Expired - Fee Related CN202857065U (en) | 2012-09-27 | 2012-09-27 | Novel LED isolation constant-current drive circuit having active power factor correction function |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343889A (en) * | 2013-04-23 | 2013-10-09 | 杭州鸿德照明科技有限公司 | Efficient energy-saving environment-friendly tripod type LED incandescent light bulb |
| CN103647454A (en) * | 2013-12-23 | 2014-03-19 | 无锡隆玛科技股份有限公司 | Self-powered power circuit of photovoltaic system |
| CN104534332A (en) * | 2015-01-04 | 2015-04-22 | 河南中云创光电科技股份有限公司 | LED fluorescent lamp |
| CN107969043A (en) * | 2017-11-28 | 2018-04-27 | 苏州合利美电子科技有限公司 | A kind of express delivery cabinet Lighting Control Assembly based on illumination compensation |
-
2012
- 2012-09-27 CN CN 201220502720 patent/CN202857065U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103343889A (en) * | 2013-04-23 | 2013-10-09 | 杭州鸿德照明科技有限公司 | Efficient energy-saving environment-friendly tripod type LED incandescent light bulb |
| CN103647454A (en) * | 2013-12-23 | 2014-03-19 | 无锡隆玛科技股份有限公司 | Self-powered power circuit of photovoltaic system |
| CN103647454B (en) * | 2013-12-23 | 2016-03-23 | 无锡隆玛科技股份有限公司 | Photovoltaic system self powered supply circuit |
| CN104534332A (en) * | 2015-01-04 | 2015-04-22 | 河南中云创光电科技股份有限公司 | LED fluorescent lamp |
| CN107969043A (en) * | 2017-11-28 | 2018-04-27 | 苏州合利美电子科技有限公司 | A kind of express delivery cabinet Lighting Control Assembly based on illumination compensation |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130403 Termination date: 20150927 |
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| EXPY | Termination of patent right or utility model |