CN202857066U - Novel high-power LED isolation constant-current driving circuit composed by discrete components - Google Patents
Novel high-power LED isolation constant-current driving circuit composed by discrete components Download PDFInfo
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- CN202857066U CN202857066U CN 201220503106 CN201220503106U CN202857066U CN 202857066 U CN202857066 U CN 202857066U CN 201220503106 CN201220503106 CN 201220503106 CN 201220503106 U CN201220503106 U CN 201220503106U CN 202857066 U CN202857066 U CN 202857066U
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Abstract
The utility model relates to a novel high-power LED isolation constant-current driving circuit composed by discrete components. The novel high-power LED isolation constant-current driving circuit includes an over-voltage and over-current protection circuit, a rectifying circuit, an EMI filtering circuit, a power factor adjustment circuit, a power switch circuit, a high-frequency buck circuit, an output rectifying and filtering circuit and a feedback control circuit. The over-voltage and over-current protection circuit, the rectifying circuits, the EMI filtering circuit, the power factor adjustment circuit, the power switch circuit and the high-frequency buck circuit, and the output rectifying and filtering circuit are connected successively; and the feedback control circuit is connected with the power switch circuit, the high-frequency buck circuit and the output rectifying and filtering circuit respectively. The novel high-power LED isolation constant-current driving circuit of the utility model has the advantages of reasonable structure, stable performance and simple technique; the components which can be easily purchased are adopted to form the novel high-power LED isolation constant-current driving circuit, and therefore, the novel high-power LED isolation constant-current driving circuit is advantageous in reduced cost and high cost performance; and with the novel high-power LED isolation constant-current driving circuit adopted, output power from 30W-150W can be flexibly realized.
Description
Technical field
The utility model relates to the great power LED isolation constant-current drive circuit that a kind of novel discrete component forms.
Background technology
LED driving power ubiquity LED drives the problems such as chip price height, whole circuit accessory cost high technology complexity now, and in order to reduce the driving cost, a lot of people are coming the forming circuit structure by integrated chip being changed into discrete device.
The utility model content
For problems of the prior art, the purpose of this utility model is to provide the technical scheme of the great power LED isolation constant-current drive circuit that a kind of novel discrete component forms.
The great power LED isolation constant-current drive circuit that described novel discrete component forms; comprise over-voltage over-current protection circuit; rectification circuit; the EMI filter circuit; power factor regulating circuit; power switch circuit; the high frequency voltage descending circuit; output rectifier and filter and feedback control circuit; over-voltage over-current protection circuit; rectification circuit; the EMI filter circuit; power factor regulating circuit; power switch circuit; the high frequency voltage descending circuit links to each other successively with output rectifier and filter, feedback control circuit respectively with power switch circuit; the high frequency voltage descending circuit links to each other with output rectifier and filter.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described over-voltage over-current protection circuit is comprised of overcurrent protection resettable fuse WHPTC and overvoltage protection piezo-resistance MY.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described rectification circuit is comprised of the rectifier bridge that diode D1-D4 consists of.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described EMI filter circuit is made of capacitor C 1, capacitor C 2 and inductance L 1.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described power factor regulating circuit is made of capacitor C 3, capacitor C 4, capacitor C 5, diode D5 and diode D6.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described power switch circuit is made of resistance R 4, resistance R 5, resistance R 6, resistance R 7, diode D8, capacitor C 8, metal-oxide-semiconductor Q3, inductance L 2.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described high frequency voltage descending circuit is made of inductance L 4.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described output rectifier and filter is made of diode D9, capacitor C 9, capacitor C 10 and inductance L 5.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described feedback control circuit is made of voltage stabilizing didoe D10, resistance R 8, resistance R 9, resistance R 10, triode Q4, IC chip, inductance L 3, resistance R 1, resistance R 2, resistance R 3, capacitor C 6, capacitor C 7, diode D7, triode Q1 and triode Q2.
The great power LED isolation constant-current drive circuit that described novel discrete component forms, described IC chip is PC816A.
The utility model is rational in infrastructure, stable performance, and technique is succinct, utilizes the accessory of easily buying to form, and reduces cost, and cost performance is high, can accomplish flexibly the 30W-150W power output.
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-power factor regulating circuit; The 5-power switch circuit; 6-high frequency voltage descending circuit; The 7-output rectifier and filter; The 8-feedback control circuit.
Embodiment
Below in conjunction with Figure of description the utility model is described further:
The great power LED isolation constant-current drive circuit that discrete component forms; comprise over-voltage over-current protection circuit 1; rectification circuit 2; EMI filter circuit 3; power factor regulating circuit 4; power switch circuit 5; high frequency voltage descending circuit 6; output rectifier and filter 7 and feedback control circuit 8; over-voltage over-current protection circuit; rectification circuit; the EMI filter circuit; power factor regulating circuit; power switch circuit; the high frequency voltage descending circuit links to each other successively with output rectifier and filter, feedback control circuit respectively with power switch circuit; the high frequency voltage descending circuit links to each other with output rectifier and filter.
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; power factor regulating circuit is by capacitor C 3; capacitor C 4; capacitor C 5; diode D5 and diode D6 consist of; power switch circuit is by resistance R 4; resistance R 5; resistance R 6; resistance R 7; diode D8; capacitor C 8; metal-oxide-semiconductor Q3; inductance L 2 consists of; the high frequency voltage descending circuit is made of inductance L 4; output rectifier and filter is by diode D9; capacitor C 9; capacitor C 10 and inductance L 5 consist of; feedback control circuit is by voltage stabilizing didoe D10; resistance R 8; resistance R 9; resistance R 10; triode Q4; the IC chip; inductance L 3; resistance R 1; resistance R 2; resistance R 3; capacitor C 6; capacitor C 7; diode D7; triode Q1 and triode Q2 consist of, and the IC chip is optocoupler PC816A.
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; diode D4 input connects respectively capacitor C 2 one ends; capacitor C 3 one ends; capacitor C 4 one ends; triode Q1 emitter; resistance R 5 one ends; resistance R 6 one ends and diode D7 are anodal; inductance L 1 other end connects respectively capacitor C 2 other ends; diode D5 negative pole; capacitor C 5 one ends; resistance R 4 one ends; capacitor C 8 one ends; resistance R 7 one ends and inductance L 2 one ends; capacitor C 3 other ends connect the anodal and diode D6 negative pole of diode D5; capacitor C 4 other ends connect anodal and capacitor C 5 other ends of diode D6; resistance R 4 other end contact resistance R3 one end; resistance R 1 one ends; triode Q2 emitter; the grid of resistance R 5 other ends and metal-oxide-semiconductor Q3; resistance R 1 other end connecting triode Q2 base stage and triode Q1 collector electrode; triode Q1 base stage connecting triode Q2 collector electrode; capacitor C 6 one ends and resistance R 2 one ends; capacitor C 6 other end contact resistance R2 other ends; resistance R 6 other ends; metal-oxide-semiconductor Q3 source electrode and IC chip; resistance R 3 other ends connect diode C7 one end; the diode C7 other end connects respectively diode D7 negative pole and inductance L 3 one ends; inductance L 3 other ends connect the IC chip; capacitor C 8 other end contact resistance R7 other ends and diode D8 negative pole; anodal drain electrode and inductance L 2 other ends that connect metal-oxide-semiconductor Q3 of diode D8; inductance L 2 and inductance L 3 are by iron core and inductance L 4 couplings; it is anodal that inductance L 4 one ends connect diode D9; inductance L 4 other end contact resistance R8 one end; triode Q4 emitter; capacitor C 9 one ends; capacitor C 10 1 ends and resistance R 9 one ends; the anodal voltage stabilizing didoe D10 negative pole that connects of diode D9; capacitor C 9 other ends and inductance L 5 one ends; the anodal contact resistance R8 other end of voltage stabilizing didoe D10 and IC chip; inductance L 5 other ends connect capacitor C 10 other ends and resistance R 10 1 ends; resistance R 10 other end contact resistance R9 other ends and triode Q4 base stage, triode Q4 collector electrode links to each other with the IC chip.
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; filtered positive negative electricity is through diode D5; diode D6; capacitor C 3; capacitor C 4; the passive power factor correcting circuit that capacitor C 5 forms is adjusted; power to switching circuit after bringing up to power factor more than 0.95; electric current flows to metal-oxide-semiconductor Q3 grid through resistance R 4; make metal-oxide-semiconductor Q3 drain electrode and source electrode conducting; the elementary L2 of metal-oxide-semiconductor Q3 conduction period high frequency transformer produces induced voltage; while inductance L 3; inductance L 4 produces corresponding induced voltage; the alternating current of inductance L 4 one ends output is through diode D9 rectification; capacitor C 9 filtering make zener diode D10 reverse breakdown; simultaneously through inductance L 3; capacitor C 10 filtering; resistance R 10 provides voltage for triode Q4 base stage; triode Q4 conducting; luminous tube has electric current to pass through and luminous in the optocoupler; the optocoupler pipe doubles as the inductor rectifier L3 other end alternating voltage of inductance L 3 one end alternating voltages through capacitor C 7 in the optocoupler; resistance R 3; for metal-oxide-semiconductor Q3 grid provides feedback pulse, so that metal-oxide-semiconductor Q3 oscillatory work.Diode D7 is the protection diode, and inductance L 3 one end alternating voltages are added to triode Q1 base stage, triode Q2 collector electrode by resistance R 2 after the IC rectification, and triode Q1, triode Q2 work is carried out pulse-width adjustment to metal-oxide-semiconductor Q3 grid voltage.When if capacitor C 9 both end voltage are higher, the luminous enhancing of luminous tube in the IC, triode Q1, triode Q2 conducting amount increase, metal-oxide-semiconductor Q3 output pulse width narrows down, and the corresponding reduction of inductance L 4 secondary output voltages is when capacitor C 9 both end voltage are on the low side, in like manner, metal-oxide-semiconductor Q3 output pulse width increases, and capacitor C 6 both end voltage increase all-the-time stable in the needed stationary value of output voltage, thereby reach the constant current-supplying purpose.
Power MOS pipe and the high frequency transformer of different sizes can make Switching Power Supply power can accomplish between the 30-150W scope of application: 30W-150W high power LED projector, bulkhead lamp capable, Tunnel Lamp, street lamp etc.
Claims (10)
1. the great power LED of novel discrete component composition is isolated constant-current drive circuit; it is characterized in that comprising over-voltage over-current protection circuit; rectification circuit; the EMI filter circuit; power factor regulating circuit; power switch circuit; the high frequency voltage descending circuit; output rectifier and filter and feedback control circuit; over-voltage over-current protection circuit; rectification circuit; the EMI filter circuit; power factor regulating circuit; power switch circuit; the high frequency voltage descending circuit links to each other successively with output rectifier and filter, feedback control circuit respectively with power switch circuit; the high frequency voltage descending circuit links to each other with output rectifier and filter.
2. the great power LED isolation constant-current drive circuit of novel discrete component composition 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 great power LED isolation constant-current drive circuit of novel discrete component composition 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 great power LED isolation constant-current drive circuit of novel discrete component composition 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 great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 1 is characterized in that described power factor regulating circuit is made of capacitor C 3, capacitor C 4, capacitor C 5, diode D5 and diode D6.
6. the great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 1 is characterized in that described power switch circuit is made of resistance R 4, resistance R 5, resistance R 6, resistance R 7, diode D8, capacitor C 8, metal-oxide-semiconductor Q3, inductance L 2.
7. the great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 1 is characterized in that described high frequency voltage descending circuit is made of inductance L 4.
8. the great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 1 is characterized in that described output rectifier and filter is made of diode D9, capacitor C 9, capacitor C 10 and inductance L 5.
9. the great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 1 is characterized in that described feedback control circuit is made of voltage stabilizing didoe D10, resistance R 8, resistance R 9, resistance R 10, triode Q4, IC chip, inductance L 3, resistance R 1, resistance R 2, resistance R 3, capacitor C 6, capacitor C 7, diode D7, triode Q1 and triode Q2.
10. the great power LED isolation constant-current drive circuit of novel discrete component composition according to claim 9 is characterized in that described IC chip is PC816A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220503106 CN202857066U (en) | 2012-09-27 | 2012-09-27 | Novel high-power LED isolation constant-current driving circuit composed by discrete components |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220503106 CN202857066U (en) | 2012-09-27 | 2012-09-27 | Novel high-power LED isolation constant-current driving circuit composed by discrete components |
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| CN202857066U true CN202857066U (en) | 2013-04-03 |
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| CN 201220503106 Expired - Fee Related CN202857066U (en) | 2012-09-27 | 2012-09-27 | Novel high-power LED isolation constant-current driving circuit composed by discrete components |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| WO2015135319A1 (en) * | 2014-03-14 | 2015-09-17 | Zhejiang Shenghui Lighting Co., Ltd | Led power circuit using discrete components and configuration method |
| CN106100597A (en) * | 2016-05-24 | 2016-11-09 | 北京工业大学 | A kind of power driven system of high temperature resistant low frequency discrete device |
| CN106533215A (en) * | 2016-12-23 | 2017-03-22 | 广州创锐特光电技术有限公司 | Monitoring equipment power supply voltage stabilizing power supply device |
| CN114415769A (en) * | 2021-12-09 | 2022-04-29 | 华荣科技股份有限公司 | Constant current source circuit for protecting fast turn-off of inductor |
-
2012
- 2012-09-27 CN CN 201220503106 patent/CN202857066U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015135319A1 (en) * | 2014-03-14 | 2015-09-17 | Zhejiang Shenghui Lighting Co., Ltd | Led power circuit using discrete components and configuration method |
| US9585208B2 (en) | 2014-03-14 | 2017-02-28 | Zhejiang Shenghui Lighting Co., Ltd | LED power circuit using discrete components and configuration method |
| CN104853507A (en) * | 2014-11-26 | 2015-08-19 | 成都冠深科技有限公司 | Bootstrap control LED driving system based on capacitance feedback three-point type oscillation circuit |
| CN106100597A (en) * | 2016-05-24 | 2016-11-09 | 北京工业大学 | A kind of power driven system of high temperature resistant low frequency discrete device |
| CN106100597B (en) * | 2016-05-24 | 2019-01-22 | 北京工业大学 | A kind of power driven system of high temperature resistant low frequency discrete device |
| CN106533215A (en) * | 2016-12-23 | 2017-03-22 | 广州创锐特光电技术有限公司 | Monitoring equipment power supply voltage stabilizing power supply device |
| CN106533215B (en) * | 2016-12-23 | 2023-08-08 | 广州创睿特光电技术股份有限公司 | Monitoring equipment power supply stabilized voltage supply device |
| CN114415769A (en) * | 2021-12-09 | 2022-04-29 | 华荣科技股份有限公司 | Constant current source circuit for protecting fast turn-off of inductor |
| CN114415769B (en) * | 2021-12-09 | 2023-06-02 | 华荣科技股份有限公司 | Constant current source circuit capable of protecting inductance to be turned off quickly |
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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 |