CN105764190A - Safe and stable LED driving device - Google Patents
Safe and stable LED driving device Download PDFInfo
- Publication number
- CN105764190A CN105764190A CN201610194680.4A CN201610194680A CN105764190A CN 105764190 A CN105764190 A CN 105764190A CN 201610194680 A CN201610194680 A CN 201610194680A CN 105764190 A CN105764190 A CN 105764190A
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- China
- Prior art keywords
- circuit
- capacitor
- wire
- led
- led drive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 58
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical group [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000001914 filtration Methods 0.000 claims abstract description 19
- 239000003822 epoxy resin Substances 0.000 claims abstract description 6
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 6
- 238000005245 sintering Methods 0.000 claims description 23
- NUJOXMJBOLGQSY-UHFFFAOYSA-N manganese dioxide Chemical compound O=[Mn]=O NUJOXMJBOLGQSY-UHFFFAOYSA-N 0.000 claims description 22
- 239000000758 substrate Substances 0.000 claims description 15
- 230000006837 decompression Effects 0.000 claims description 13
- 239000007784 solid electrolyte Substances 0.000 claims description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 239000004593 Epoxy Substances 0.000 claims description 4
- MIVBAHRSNUNMPP-UHFFFAOYSA-N manganese(2+);dinitrate Chemical compound [Mn+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O MIVBAHRSNUNMPP-UHFFFAOYSA-N 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 230000003647 oxidation Effects 0.000 claims description 4
- 238000007254 oxidation reaction Methods 0.000 claims description 4
- 229910000648 terne Inorganic materials 0.000 claims description 4
- 239000004743 Polypropylene Substances 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 229920001155 polypropylene Polymers 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000005538 encapsulation Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 229910052715 tantalum Inorganic materials 0.000 abstract 1
- 230000036772 blood pressure Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000178 monomer Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical group [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/30—Driver circuits
- H05B45/37—Converter circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/005—Electrodes
- H01G4/008—Selection of materials
- H01G4/0085—Fried electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/224—Housing; Encapsulation
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
- H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
-
- 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]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
The invention discloses a safe and stable LED driving device, including an input protection circuit, a voltage reduction circuit, a rectification and filtering circuit and a voltage dividing and current limiting resistor. The voltage dividing and current limiting resistor performs current limiting on an LED light source circuit and performs current-limiting protection on an LED, so that the LED works under driving of stable voltage and current, and the service life of the LED is guaranteed; and a filter capacitor in the rectification and filtering circuit is a tantalum electrolytic capacitor, under the condition of the same withstand voltage and capacitance, the volume of the filter capacitor is relatively small, the volume of the safe and stable LED driving device can be reduced, the performance is stable, good electrical performance can still be maintained after long-time work, and the service life of an LED driving circuit can be prolonged. The housing of the filter capacitor is an epoxy resin housing formed by adoption of epoxy resin for encapsulation outside a capacitor element, and has an anticreep function, and thus is safer.
Description
Technical field
The present invention relates to field of LED drive, particularly to the LED drive device of a kind of safety and stability.
Background technology
LED illumination is a kind of new type light source of rapid rising development in recent years, and its many good feature makes its application surface more and more wider.LED is the electric light source extremely grown in a kind of life-span, can reach service life 100,000 hours, but in actual applications, the actual life of LED is not high, and what even have just damaged less than 1 year.This is could to work owing to the unilateal conduction characteristic of LED makes LED must be equipped with LED drive circuit, and the reliability of LED drive circuit is not high, and driveability is bad.In LED drive circuit, when particularly electric main drives LED, LED drive circuit is it is necessary to have input rectifying filter circuit and output rectifier and filter.Input rectifying filter circuit needs relatively large capacitance rectifier output voltage could be smoothed to allowed band.Output rectifier and filter is also required to enough capacitances and comes the stability of holding circuit and the smooth of output electric current.Relative to semiconductor device and the passive element in 100,000 hours life and semipermanent life-span, aluminium electrolutic capacitor is the key element causing the LED drive circuit life-span not reach requirement.
Summary of the invention
The main purpose of the present invention is to provide one can carry out current-limiting protection to LED, it is achieved brightness uniformity that LED shows, stable, and the LED drive device of the safety and stability of long service life.
The present invention proposes the LED drive device of a kind of safety and stability; including pcb board, the input protection circuit of the electric connection being arranged on pcb board, reduction voltage circuit and current rectifying and wave filtering circuit; described current rectifying and wave filtering circuit is full-wave voltage doubler, and described full-wave voltage doubler includes two commutation diodes and two filter capacitors；nullDescribed filter capacitor includes shell and the capacitor element being placed in described shell，Described capacitor element includes capacitor core、Negative wire and positive wire，Described capacitor core includes by the porous tantalum powder sintering block positive electrode substrate of high temperature sintering after tantalum metal powder briquet，The surface of described tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation，A tantalum wire is stretched out in described tantalum powder sintering block positive electrode substrate，Described positive wire welds with described tantalum wire，Described tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering，Described solid electrolyte MnO2 layer is coated with negative pole graphite linings，Described negative pole graphite linings is coated with terne metal conductive layer，Described negative wire is electrically connected with described solid electrolyte MnO2 layer，Described negative wire and described positive wire be arranged in parallel，Described shell is that employing is epoxy resin enclosed at the outside epoxy package formed of described capacitor core；Described positive wire and described negative wire are welded on described pcb board；Described LED drive device also includes at least one current-limiting resistor voltage divider, and described current-limiting resistor voltage divider is connected on the outfan of described current rectifying and wave filtering circuit.
Preferably, described shell is the shell of one end open, the other end at described shell has negative wire hole, described capacitor core loads in described shell from the opening of described shell, described negative wire stretches out from described negative wire hole, open end cap at described shell sets rubber seal plug, has positive wire hole beyond the Great Wall in described rubber seal, and described positive wire stretches out from described positive wire hole.
Preferably, described input protection circuit is made up of a fuse.
Preferably, described reduction voltage circuit is made up of decompression capacitor and the first bleeder resistance, and described first bleeder resistance is connected in parallel on the two ends of described decompression capacitor.
Preferably, described decompression capacitor is polypropylene film electric capacity.
The present invention includes the input protection circuit, reduction voltage circuit, current rectifying and wave filtering circuit and the current-limiting resistor voltage divider that are electrically connected; during external AC; High Level AC Voltage is through reduction voltage circuit blood pressure lowering; the DC voltage of output smoothing after filtering then through the rectifies in current rectifying and wave filtering circuit and filter capacitor; current-limiting resistor voltage divider is used for current limliting; realize LED is carried out current-limiting protection; LED is made to work under stable voltage and current drives; LED is prevented to be burned because electric current is excessive; guarantee the service life of LED, and realize brightness uniformity that LED shows, stable.
After the tantalum powder briquet that filter capacitor employing granule is very thin, high temperature sintering becomes the tantalum powder sintering block positive electrode substrate of porous, and the effective area in monomer whose is long-pending is big, uses temperature range width；The surface of tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation, and the dielectric constant of TaO5 film is bigger than the dielectric constant of alumite；Negative pole end in tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering, is coated with negative pole graphite linings, is coated with terne metal conductive layer in negative pole graphite linings on solid electrolyte MnO2 layer；Therefore when identical pressure and capacitance, the small volume of filter capacitor, can reduce the volume of the LED drive device of safety and stability, and stable performance, work long hours the electrical property remaining to keep good, can extend the service life of LED drive circuit.
The shell of filter capacitor is that employing is epoxy resin enclosed has anticreep effect at the outside epoxy package formed of capacitor element, safer.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the LED drive device of the safety and stability of the present invention；
Fig. 2 is the sectional view of the capacitor core of the filter capacitor in the LED drive device of the safety and stability of the present invention；
Fig. 3 is the sectional view of the filter capacitor in the LED drive device of the safety and stability of the present invention.
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
Referring to figs. 1 through Fig. 3, it is proposed to an embodiment of the LED drive device of the safety and stability of the present invention:
This LED drive device includes pcb board, the input protection circuit of the electric connection being arranged on pcb board, reduction voltage circuit 1 and current rectifying and wave filtering circuit 2.Alternating current input is connected with input protection circuit; this input protection circuit is made up of a fuse F; the effect of fuse F is to provide circuit safety protection; when short circuit or heavy overload; fuse F automatically fuses and makes circuit disconnect, thus realizing short-circuit protection or heavy overload protection.The input of reduction voltage circuit 1 is connected with the outfan of input protection circuit, for the High Level AC Voltage of input is carried out blood pressure lowering.Reduction voltage circuit 1 is made up of decompression capacitor C1 and the first bleeder resistance R1, and decompression capacitor C1 can produce capacitive reactance under certain AC signal frequency, thus limiting the maximum operating currenbt of LED drive circuit, it is achieved current limliting blood pressure lowering.Decompression capacitor C1 is CBB22 polypropylene film electric capacity, and volume is little, economical, reliable, efficiency is high.First bleeder resistance R1 is connected in parallel on the two ends of decompression capacitor C1, for providing, to decompression capacitor C1, path of releasing, in order to after decompression capacitor C1 quits work, and the electric energy of decompression capacitor C1 two ends storage of releasing.
The input of current rectifying and wave filtering circuit 2 is connected with the outfan of reduction voltage circuit 1, and reduction voltage circuit 1 exports after High Level AC Voltage is carried out blood pressure lowering to current rectifying and wave filtering circuit 2, current rectifying and wave filtering circuit 2 carry out rectifying and wave-filtering.Current rectifying and wave filtering circuit 2 is full-wave voltage doubler, including two commutation diode D1, D2, two filter capacitors C2, C3 and the second bleeder resistance R2, two filter capacitor C2, C3 series connection, two commutation diode D1, D2 series connection, two commutation diode D1, D2 of series connection are in parallel with two filter capacitor C2, the C3 connected, second bleeder resistance R2 is connected in parallel on the two ends of two filter capacitor C2, C3 of series connection, constitutes a full-wave voltage doubler.Second bleeder resistance R2 is for providing a path of releasing to filter capacitor C2, C3, in order to after filter capacitor C2, C3 quit work, the electric energy of its two ends storage of releasing.Reduction voltage circuit outfan is connected between two commutation diode D1, D2 and between two filter capacitor C2, C3, during circuit work, two commutation diode Dl, D2 and two electric capacity C2, C3 composition full-wave voltage doubler the alternating voltage of input is carried out rectification, filtering, obtain a smooth DC voltage and export.
Outfan at current rectifying and wave filtering circuit is in series with at least one current-limiting resistor voltage divider R3, is used for reducing electric current, plays metering function.Current-limiting resistor voltage divider R3 is provided with four, is serially connected between current-limiting resistor voltage divider R3, and the resistance of current-limiting resistor voltage divider R3 is 22～68 Ω.
Filter capacitor C2, C3 include shell 10 and the capacitor element being placed in shell 10, and capacitor element includes capacitor core 20, negative wire 40 and positive wire 30.Capacitor core 20 includes by the porous tantalum powder sintering block positive electrode substrate 21 of high temperature sintering after tantalum metal powder briquet, and the effective area in monomer whose is long-pending is big, uses temperature range width.The dielectric constant that the surface of tantalum powder sintering block positive electrode substrate 21 is formed with TaO5 film 22, TaO5 film 22 through anodic oxidation is bigger than the dielectric constant of alumite.Stretching out a tantalum wire 26 to positive terminal in tantalum powder sintering block positive electrode substrate 21, positive wire 40 welds with tantalum wire 26, and positive wire is nickel wire.Negative pole end in tantalum powder sintering block positive electrode substrate 21 forms solid electrolyte MnO2 layer 23 by impregnating manganese nitrate then through high temperature sintering, solid electrolyte MnO2 layer 23 is coated with negative pole graphite linings 24, negative pole graphite linings 24 is coated with terne metal conductive layer 25, negative wire 50 is welded on the negative pole end of capacitor core 20, is electrically connected with solid electrolyte MnO2 layer 23.Negative wire 40 is copper wire.Negative wire 40 and positive wire 30 be arranged in parallel.Positive wire 30 and negative wire 40 are welded on pcb board.
This filter capacitor when identical pressure and capacitance, its small volume, can reduce the volume of the LED drive device of safety and stability, and stable performance, work long hours the electrical property remaining to keep good, can extend the service life of LED drive circuit.And the shell 10 of filter capacitor is for adopting the epoxy resin enclosed epoxy package formed in capacitor element outside, has anticreep effect, safer.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure transformation utilizing description of the present invention and accompanying drawing content to make; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (4)
1. the LED drive device of a safety and stability; including pcb board, the input protection circuit of the electric connection being arranged on pcb board, reduction voltage circuit and current rectifying and wave filtering circuit; it is characterized in that; described current rectifying and wave filtering circuit is full-wave voltage doubler, and described full-wave voltage doubler includes two commutation diodes and two filter capacitors；nullDescribed filter capacitor includes shell and the capacitor element being placed in described shell，Described capacitor element includes capacitor core、Negative wire and positive wire，Described capacitor core includes by the porous tantalum powder sintering block positive electrode substrate of high temperature sintering after tantalum metal powder briquet，The surface of described tantalum powder sintering block positive electrode substrate is formed with TaO5 film through anodic oxidation，A tantalum wire is stretched out in described tantalum powder sintering block positive electrode substrate，Described positive wire welds with described tantalum wire，Described tantalum powder sintering block positive electrode substrate forms solid electrolyte MnO2 layer by impregnating manganese nitrate then through high temperature sintering，Described solid electrolyte MnO2 layer is coated with negative pole graphite linings，Described negative pole graphite linings is coated with terne metal conductive layer，Described negative wire is electrically connected with described solid electrolyte MnO2 layer，Described negative wire and described positive wire be arranged in parallel，Described shell is that employing is epoxy resin enclosed at the outside epoxy package formed of described capacitor core；Described positive wire and described negative wire are welded on described pcb board；
Described LED drive device also includes at least one current-limiting resistor voltage divider, and described current-limiting resistor voltage divider is connected on the outfan of described current rectifying and wave filtering circuit.
2. the LED drive device of safety and stability according to claim 1, it is characterised in that described input protection circuit is made up of a fuse.
3. the LED drive device of safety and stability according to claim 1, it is characterised in that described reduction voltage circuit is made up of decompression capacitor and the first bleeder resistance, and described first bleeder resistance is connected in parallel on the two ends of described decompression capacitor.
4. the LED drive device of safety and stability according to claim 3, it is characterised in that described decompression capacitor is polypropylene film electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610194680.4A CN105764190A (en) | 2016-03-31 | 2016-03-31 | Safe and stable LED driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610194680.4A CN105764190A (en) | 2016-03-31 | 2016-03-31 | Safe and stable LED driving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105764190A true CN105764190A (en) | 2016-07-13 |
Family
ID=56345921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610194680.4A Pending CN105764190A (en) | 2016-03-31 | 2016-03-31 | Safe and stable LED driving device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105764190A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764844A (en) * | 1986-06-13 | 1988-08-16 | Murata Manufacturing Co., Ltd. | Electronic component with terminal caps |
| CN101329951A (en) * | 2008-05-23 | 2008-12-24 | 电子科技大学 | High-frequency nonpolarity solid tantalum electrolytic capacitor with lead wire and manufacturing method thereof |
| CN101609749A (en) * | 2008-06-17 | 2009-12-23 | 三星电机株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN203181275U (en) * | 2012-12-31 | 2013-09-04 | 陈榕锦 | LED drive circuit |
| CN104916435A (en) * | 2015-06-28 | 2015-09-16 | 吕杨 | Capacitor |
-
2016
- 2016-03-31 CN CN201610194680.4A patent/CN105764190A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4764844A (en) * | 1986-06-13 | 1988-08-16 | Murata Manufacturing Co., Ltd. | Electronic component with terminal caps |
| CN101329951A (en) * | 2008-05-23 | 2008-12-24 | 电子科技大学 | High-frequency nonpolarity solid tantalum electrolytic capacitor with lead wire and manufacturing method thereof |
| CN101609749A (en) * | 2008-06-17 | 2009-12-23 | 三星电机株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN203181275U (en) * | 2012-12-31 | 2013-09-04 | 陈榕锦 | LED drive circuit |
| CN104916435A (en) * | 2015-06-28 | 2015-09-16 | 吕杨 | Capacitor |
Non-Patent Citations (1)
| Title |
|---|
| 肖景和: "《电子元器件识别与检测百问百答》", 31 July 2009, 北京：人民邮电出版社 * |
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Application publication date: 20160713 |
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