CN205544943U - Isolated form LED switching power supply circuit - Google Patents
Isolated form LED switching power supply circuit Download PDFInfo
- Publication number
- CN205544943U CN205544943U CN201620088131.4U CN201620088131U CN205544943U CN 205544943 U CN205544943 U CN 205544943U CN 201620088131 U CN201620088131 U CN 201620088131U CN 205544943 U CN205544943 U CN 205544943U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model discloses an isolated form LED switching power supply circuit, including rectifier bridge T, inductance L1, triode V1 and transformer W, rectifier bridge T's port 1 is connected transient voltage and is restrained diode DW and input voltage U1, and rectifier bridge T's port 3 is connected transient voltage and is restrained diode DW's the other end and input voltage U1's the other end, and electric capacity C1 and inductance L1 are connected to rectifier bridge T's port 2, and electric capacity C2, resistance R1, resistance R3 and transformer W's winding N1 is connected to inductance L1's the other end. The utility model discloses isolated form LED switching power supply circuit simple structure, components and parts are few, use on -off control dedicated chip as the master element, increase the stability of circuit through carry out feedback compensation to output voltage, and set up multiple anti interference filtration module in the circuit, have consequently that the function is various, stability is strong and application scope advantage extensively.
Description
Technical field
The utility model relates to a kind of power circuit, specifically a kind of isolated form LED switch power circuit.
Background technology
Along with the negative effect caused by Global Greenhouse Effect constantly manifests, in the world every country all using energy-saving and emission-reduction as the major issue that be must take in native economic development, the emerging power-saving technology that LED lighting engineering is arisen at the historic moment just under this background.LED illuminating product has had been applied in daily life, along with developing rapidly of LED at present.The conventional light source that now white LED light source is compared has life-span length, solid state lighting is hardly damaged, specular removal, without advantages such as mercury environmental protection, antidetonations, following will become third generation light source, another revolution of lighting field will be brought.The power circuit of LED directly determines functional performance and the service life of LED, and existing LED power exists the defect that anti-interference is poor, input voltage range is little, range is little more.
Utility model content
The purpose of this utility model is to provide a kind of isolated form LED switch power circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of the utility model offer:
nullA kind of isolated form LED switch power circuit，Including rectifier bridge T、Inductance L1、Triode V1 and transformer W，The port 1 of described rectifier bridge T connects transient voltage suppressor diode DW and input terminal voltage U1，The port 3 of rectifier bridge T connects the other end and the other end of input terminal voltage U1 of transient voltage suppressor diode DW，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Resistance R1、The winding N1 of resistance R3 and transformer W，The other end of electric capacity C2 connects the other end and the ground of inductance L2，The other end of resistance R3 connects resistance R4 and the pin 4 of chip IC 1，The other end of resistance R4 connects resistance R5 and the emitter stage of triode V1，The other end of the winding N1 of the colelctor electrode connection transformer W of triode V1，The base stage of triode V1 connects the pin 5 of chip IC 1，The pin 1 of chip IC 1 connects resistance R6，The other end of resistance R6 connects the other end of resistance R1、Resistance R7 and electric capacity C4，The pin 2 of chip IC 1 connects electric capacity C3、Electric capacity C4、The winding N3 of resistance R9 and transformer W，The pin 3 of chip IC 1 connects the other end of electric capacity C3，The other end of resistance R7 connects the negative electrode of diode D2，The other end of resistance R8 connects the anode of diode D2 and the other end of the winding N3 of transformer W，One end of the winding N2 of transformer W connects electric capacity C5 and LED lamp H，The other end of electric capacity C5 connects electric capacity C6、The anode of diode D1 and LED lamp H，The other end of electric capacity C6 connects the other end of resistance R2，The other end of resistance R2 connects the negative electrode of diode D1 and the other end of the winding N2 of transformer W，The model of described chip IC 1 is BF1502.
As preferred version of the present utility model: described electric capacity C5 is filter capacitor.
Compared with prior art, the beneficial effects of the utility model are: the utility model isolated form LED switch circuit construction of electric power is simple, components and parts are few, use switch control rule special chip as master element, the stability of circuit is increased by output voltage being carried out feedback compensation, and it is provided with multiple anti-interference filtration module in circuit, therefore there is the advantage that diverse in function, stability are strong and applied widely.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of isolated form LED switch power circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the utility model rather than whole embodiments.Based on the embodiment in the utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of the utility model protection.
nullRefer to Fig. 1，In the utility model embodiment，A kind of isolated form LED switch power circuit，Including rectifier bridge T、Inductance L1、Triode V1 and transformer W，The port 1 of described rectifier bridge T connects transient voltage suppressor diode DW and input terminal voltage U1，The port 3 of rectifier bridge T connects the other end and the other end of input terminal voltage U1 of transient voltage suppressor diode DW，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Resistance R1、The winding N1 of resistance R3 and transformer W，The other end of electric capacity C2 connects the other end and the ground of inductance L2，The other end of resistance R3 connects resistance R4 and the pin 4 of chip IC 1，The other end of resistance R4 connects resistance R5 and the emitter stage of triode V1，The other end of the winding N1 of the colelctor electrode connection transformer W of triode V1，The base stage of triode V1 connects the pin 5 of chip IC 1，The pin 1 of chip IC 1 connects resistance R6，The other end of resistance R6 connects the other end of resistance R1、Resistance R7 and electric capacity C4，The pin 2 of chip IC 1 connects electric capacity C3、Electric capacity C4、The winding N3 of resistance R9 and transformer W，The pin 3 of chip IC 1 connects the other end of electric capacity C3，The other end of resistance R7 connects the negative electrode of diode D2，The other end of resistance R8 connects the anode of diode D2 and the other end of the winding N3 of transformer W，One end of the winding N2 of transformer W connects electric capacity C5 and LED lamp H，The other end of electric capacity C5 connects electric capacity C6、The anode of diode D1 and LED lamp H，The other end of electric capacity C6 connects the other end of resistance R2，The other end of resistance R2 connects the negative electrode of diode D1 and the other end of the winding N2 of transformer W，The model of described chip IC 1 is BF1502.
Electric capacity C5 is filter capacitor.
Operation principle of the present utility model is: input voltage U1 carries out rectification through rectifier bridge T, and is stored in by energy in electric capacity C1 and C2.The pi type filter being made up of L1, L2, C1, C2 is for suppressing differential mode electromagnetic interference；Coordinate transient voltage suppressor diode DW to eliminate civil power peak voltage simultaneously, the precision of circuit can be effectively improved.
Chip IC 1 uses the auxiliary winding N3 of transformer W to power, and ancillary coil also serves as a part for output voltage feedback simultaneously, and the ratio changing resistance R8 from R9 can obtain different output voltages, and supply LED lamp H uses.And according to the line fall size of output, the amplitude of compensation can be adjusted by increasing R8 Yu R9 resistance in proportion.R1, R2, C4 form start-up circuit.When circuit starts power up, C4 is charged by circuit by R1 and R2, and only when on C4, voltage exceedes certain value, chip is just started working；Quit work when C4 powers on and presses off beginning power down and less than chip during certain value, R3, R4 are for the feedforward compensation of input voltage change, thus the deviation of the power output that the time delay of chip internal causes can be adjusted by the ratio of this divider resistance, diode D1 is used for exporting rectification, R2 and C6 is connected in parallel on D1 two ends, D1 can be prevented to be produced from Induced Oscillation under HF switch state, and C5 is output filter capacitor.
Claims (2)
- null1. an isolated form LED switch power circuit，Including rectifier bridge T、Inductance L1、Triode V1 and transformer W，It is characterized in that，The port 1 of described rectifier bridge T connects transient voltage suppressor diode DW and input terminal voltage U1，The port 3 of rectifier bridge T connects the other end and the other end of input terminal voltage U1 of transient voltage suppressor diode DW，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Resistance R1、The winding N1 of resistance R3 and transformer W，The other end of electric capacity C2 connects the other end and the ground of inductance L2，The other end of resistance R3 connects resistance R4 and the pin 4 of chip IC 1，The other end of resistance R4 connects resistance R5 and the emitter stage of triode V1，The other end of the winding N1 of the colelctor electrode connection transformer W of triode V1，The base stage of triode V1 connects the pin 5 of chip IC 1，The pin 1 of chip IC 1 connects resistance R6，The other end of resistance R6 connects the other end of resistance R1、Resistance R7 and electric capacity C4，The pin 2 of chip IC 1 connects electric capacity C3、Electric capacity C4、The winding N3 of resistance R9 and transformer W，The pin 3 of chip IC 1 connects the other end of electric capacity C3，The other end of resistance R7 connects the negative electrode of diode D2，The other end of resistance R8 connects the anode of diode D2 and the other end of the winding N3 of transformer W，One end of the winding N2 of transformer W connects electric capacity C5 and LED lamp H，The other end of electric capacity C5 connects electric capacity C6、The anode of diode D1 and LED lamp H，The other end of electric capacity C6 connects the other end of resistance R2，The other end of resistance R2 connects the negative electrode of diode D1 and the other end of the winding N2 of transformer W，The model of described chip IC 1 is BF1502.
- Isolated form LED switch power circuit the most according to claim 1, it is characterised in that described electric capacity C5 is filter capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620088131.4U CN205544943U (en) | 2016-01-29 | 2016-01-29 | Isolated form LED switching power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620088131.4U CN205544943U (en) | 2016-01-29 | 2016-01-29 | Isolated form LED switching power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544943U true CN205544943U (en) | 2016-08-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620088131.4U Expired - Fee Related CN205544943U (en) | 2016-01-29 | 2016-01-29 | Isolated form LED switching power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544943U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347496A (en) * | 2018-10-11 | 2019-02-15 | 黄河水利职业技术学院 | A kind of data transfer of computer anti-interference process device |
| CN111263269A (en) * | 2020-01-20 | 2020-06-09 | 广州市舒音电子科技有限公司 | Multifunctional microphone |
| CN114740580A (en) * | 2020-12-23 | 2022-07-12 | 浙江宇视科技有限公司 | Drive chip control method, drive chip control device, electronic equipment and medium |
-
2016
- 2016-01-29 CN CN201620088131.4U patent/CN205544943U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109347496A (en) * | 2018-10-11 | 2019-02-15 | 黄河水利职业技术学院 | A kind of data transfer of computer anti-interference process device |
| CN111263269A (en) * | 2020-01-20 | 2020-06-09 | 广州市舒音电子科技有限公司 | Multifunctional microphone |
| CN114740580A (en) * | 2020-12-23 | 2022-07-12 | 浙江宇视科技有限公司 | Drive chip control method, drive chip control device, electronic equipment and medium |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20160831 Termination date: 20190129 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |