CN105657913A - LED driving power supply - Google Patents
LED driving power supply Download PDFInfo
- Publication number
- CN105657913A CN105657913A CN201610195153.5A CN201610195153A CN105657913A CN 105657913 A CN105657913 A CN 105657913A CN 201610195153 A CN201610195153 A CN 201610195153A CN 105657913 A CN105657913 A CN 105657913A
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- China
- Prior art keywords
- electrode set
- negative electrode
- capacitor
- circuit
- positive electrode
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- 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
-
- 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]
Abstract
The invention discloses an LED driving power supply, comprising an input protective circuit, a step-down circuit, a rectifying filter circuit and a divider current-limiting resistor that are electrically connected. The divider current-limiting resistor carries out current limiting protection for LEDs; a filter capacitor in the rectifying filter circuit is a tantalum electrolytic capacitor, having stable performance, having constant electrical performance in long-term running and giving a longer life to the driving power supply. A shell is composed of a positive electrode sleeve and a negative electrode sleeve disposed at two ends, and an insulating sleeve connected between the positive electrode sleeve and the negative electrode sleeve, the positive electrode sleeve, the negative electrode sleeve and the insulating sleeve are fastened in corresponding locking grooves through locking hooks, the positive electrode sleeve, the negative electrode sleeve and the insulating sleeve are mutually connected to form the shell, the filter capacitor is horizontally placed on a PCB (printed circuit board) and is welded to the same through the positive electrode sleeve and the negative electrode sleeve, the height of the filter capacitor can be reduced, electronic components are more compact, and the size of an LED drive is reduced.
Description
Technical field
The present invention relates to field of LED drive, particularly to a kind of LED with driving power supply.
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. It addition, what electric capacity connected generally by the pin drawn, such electric capacity is installed on circuit boards, and it highly determines the height of circuit board, causes the excessive height of circuit board.
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 of compact conformation, long service life is with driving power supply.
The present invention proposes a kind of LED and drives power supply, 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, also including at least one current-limiting resistor voltage divider, described current-limiting resistor voltage divider is connected on the outfan of described 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;Described 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 shell is by the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between described anode electrode set and described negative electrode set are constituted, described insulation sleeve and described anode electrode set, connected by snap between described negative electrode set, it is provided with draw-in groove at the two ends of described insulation sleeve internal face, it is provided with the snap fit corresponding with described draw-in groove with one end that described insulation sleeve is connected what described anode electrode set overlapped with described negative electrode, buckle in corresponding described draw-in groove by described snap fit, make described anode electrode set, negative electrode set is interconnected to form shell with described insulation sleeve,
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, negative pole end in 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 positive wire extend out in described tantalum powder sintering block positive electrode substrate and contacts with described anode electrode set, described negative wire extend out to from described solid electrolyte MnO2 layer and contacts with described negative electrode set,
Described filter capacitor lies on described pcb board, and described anode electrode set and described negative electrode set are welded on described pcb board.
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, LED can be reduced and drive the volume of power supply, and stable performance, work long hours and remain to the electrical property that maintenance is good, the service life of LED drive power can be extended.
The shell of filter capacitor is made up of the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between anode electrode set and negative electrode set, it is connected by snap between insulation sleeve with anode electrode set, negative electrode set, it is provided with draw-in groove at the two ends of insulation sleeve internal face, the one end being connected with insulation sleeve overlapped with negative electrode at anode electrode set is provided with the snap fit corresponding with draw-in groove, buckle in corresponding draw-in groove by snap fit, anode electrode set, negative electrode set is made to be interconnected to form shell with insulation sleeve, simple in construction, easy to assembly.
Filter capacitor lies on pcb board, and anode electrode set and negative electrode set are welded on pcb board, can reduce the height of filter capacitor, also make between electronic devices and components compacter, reduces the LED volume driven.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the LED driving power supply of the present invention;
Fig. 2 is the sectional view of the filter capacitor in the LED driving power supply 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. 2, it is proposed to the LED of the present invention embodiment driving power supply:
This LED driving power supply 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 ��.
Filter capacitor C2, C3 include shell and the capacitor element being placed in shell, and capacitor element includes capacitor core, negative wire and positive wire. Shell is made up of the anode electrode set 11 being placed in two ends, negative electrode set 12 and the insulation sleeve 13 being connected between anode electrode set 11 and negative electrode set 12, is connected by snap between insulation sleeve 13 with anode electrode set 11, negative electrode set 12.It is provided with draw-in groove at the two ends of insulation sleeve 13 internal face, anode electrode overlap 11 with negative electrode overlap 12 be provided with the snap fit 14 corresponding with draw-in groove with one end that insulation sleeve 13 is connected, buckle in corresponding draw-in groove by snap fit 14, anode electrode set 11, negative electrode set 12 is made to be interconnected to form shell with insulation sleeve 13, simple in construction, easy to assembly.
Capacitor core 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. 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 is copper wire, and positive wire is nickel wire. Positive wire extend out in tantalum powder sintering block positive electrode substrate 21 and contacts with anode electrode set 11, and negative wire extend out to from solid electrolyte MnO2 layer 23 and contacts with negative electrode set 12.
Filter capacitor C2, C3 lie on pcb board, and anode electrode set 11 and negative electrode set 12 are welded on pcb board, can reduce the height of filter capacitor, also make between electronic devices and components compacter, reduce the LED volume driven.
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. a LED is with driving power supply, 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, also including at least one current-limiting resistor voltage divider, described current-limiting resistor voltage divider is connected on the outfan of described 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, described 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 shell is by the anode electrode set being placed in two ends, negative electrode set and the insulation sleeve being connected between described anode electrode set and described negative electrode set are constituted, described insulation sleeve and described anode electrode set, connected by snap between described negative electrode set, it is provided with draw-in groove at the two ends of described insulation sleeve internal face, it is provided with the snap fit corresponding with described draw-in groove with one end that described insulation sleeve is connected what described anode electrode set overlapped with described negative electrode, buckle in corresponding described draw-in groove by described snap fit, make described anode electrode set, negative electrode set is interconnected to form shell with described insulation sleeve,
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, negative pole end in 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 positive wire extend out in described tantalum powder sintering block positive electrode substrate and contacts with described anode electrode set, described negative wire extend out to from described solid electrolyte MnO2 layer and contacts with described negative electrode set,
Described filter capacitor lies on described pcb board, and described anode electrode set and described negative electrode set are welded on described pcb board.
2. LED according to claim 1 drives power supply, it is characterised in that described input protection circuit is made up of a fuse.
3. LED according to claim 1 drives power supply, 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. LED according to claim 3 drives power supply, it is characterised in that described decompression capacitor is polypropylene film electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195153.5A CN105657913A (en) | 2016-03-31 | 2016-03-31 | LED driving power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195153.5A CN105657913A (en) | 2016-03-31 | 2016-03-31 | LED driving power supply |
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| Publication Number | Publication Date |
|---|---|
| CN105657913A true CN105657913A (en) | 2016-06-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610195153.5A Pending CN105657913A (en) | 2016-03-31 | 2016-03-31 | LED driving power supply |
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| CN (1) | CN105657913A (en) |
Citations (4)
| 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 |
| CN101609749A (en) * | 2008-06-17 | 2009-12-23 | 三星电机株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN202695132U (en) * | 2012-08-10 | 2013-01-23 | 慈溪市日益电容器厂 | Capacitor |
| CN203181275U (en) * | 2012-12-31 | 2013-09-04 | 陈榕锦 | LED drive circuit |
-
2016
- 2016-03-31 CN CN201610195153.5A patent/CN105657913A/en active Pending
Patent Citations (4)
| 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 |
| CN101609749A (en) * | 2008-06-17 | 2009-12-23 | 三星电机株式会社 | Solid electrolytic capacitor And Manufacturing approach |
| CN202695132U (en) * | 2012-08-10 | 2013-01-23 | 慈溪市日益电容器厂 | Capacitor |
| CN203181275U (en) * | 2012-12-31 | 2013-09-04 | 陈榕锦 | LED drive circuit |
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| PB01 | Publication | ||
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Application publication date: 20160608 |