CN105810438A - Light emitting diode (LED) driving power supply for driving LED - Google Patents

Light emitting diode (LED) driving power supply for driving LED Download PDF

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Publication number
CN105810438A
CN105810438A CN201610195170.9A CN201610195170A CN105810438A CN 105810438 A CN105810438 A CN 105810438A CN 201610195170 A CN201610195170 A CN 201610195170A CN 105810438 A CN105810438 A CN 105810438A
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CN
China
Prior art keywords
described
led
capacitor
circuit
driving
Prior art date
Application number
CN201610195170.9A
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Chinese (zh)
Inventor
阮冠峰
Original Assignee
中山市帝森电子科技有限公司
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Priority to CN201610195170.9A priority Critical patent/CN105810438A/en
Publication of CN105810438A publication Critical patent/CN105810438A/en

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Classifications

    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/04Electrodes or formation of dielectric layers thereon
    • H01G9/048Electrodes or formation of dielectric layers thereon characterised by their structure
    • H01G9/052Sintered electrodes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/008Terminals
    • H01G9/012Terminals specially adapted for solid capacitors
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/022Electrolytes, absorbents
    • H01G9/025Solid electrolytes
    • H01G9/032Inorganic semiconducting electrolytes, e.g. MnO2
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G9/004Details
    • H01G9/08Housing; Encapsulation
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B45/00Circuit arrangements for operating light emitting diodes [LED]
    • H05B45/30Driver circuits
    • H05B45/37Converter circuits
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
    • H01G9/00Electrolytic capacitors, rectifiers, detectors, switching devices, light-sensitive or temperature-sensitive devices; Processes of their manufacture
    • H01G2009/0014Solid electrolytic capacitors
    • H01G2009/0021Skin fibre
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00Energy efficient lighting technologies
    • Y02B20/30Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
    • Y02B20/34Inorganic LEDs
    • Y02B20/341Specially adapted circuits

Abstract

The invention discloses a light emitting diode (LED) driving power supply for driving an LED. The LED driving power supply comprises an input protection circuit, a buck circuit, a rectification filter circuit and a voltage division and current limiting resistor which are electrically connected, wherein the voltage division and current limiting resistor is used for current limiting protection of the LED so that the LED works under the driving of stable voltage and current; filter capacitors in the rectification filter circuit are tantalum electrolytic capacitors and are stable in performance, favorable electrical performance still can be maintained after the filter capacitors work for a long time, and the service lifetime of the LED driving power supply can be prolonged; a chip resistor for discharging is arranged in each filter capacitor and can be used for discharging electricity stored in a capacitor core within a short time when the power supply is cut off, the voltage of the capacitor core is reduced to 0, so that a discharge resistor is not needed to be connected in parallel to the two ends of the filter capacitor; and a space between an inner cavity of a shell of the filter capacitor and a capacitor component is filled with epoxy resin, the insulation effect is high, the capacitor component also can be protected, short circuit or electric leakage is prevented, and an LED driving device is safer.

Description

A kind of for driving the LED drive power of LED

Technical field

The present invention relates to field of LED drive, particularly to a kind of for driving the LED drive power of LED.

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 power of long service life.

The present invention proposes a kind of LED drive power for driving LED; 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 aluminium shell and the capacitor element being placed in described shell,Described capacitor element includes capacitor core、Negative wire、Positive wire and electric discharge Chip-R,Described Chip-R is in parallel with described capacitor core,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 to positive terminal in described tantalum powder sintering block positive electrode substrate,Described positive wire welds with described tantalum wire,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 negative wire is welded on the negative pole end of described capacitor core,It is electrically connected with described solid electrolyte MnO2 layer;Being provided with positive terminal pad and negative terminal pad on described capacitor core, the positive pole of described Chip-R is welded on described positive terminal pad, and the negative pole of described Chip-R is welded in described negative terminal pad;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, it is filled with epoxy resin between described shell inner cavity and described capacitor element, open end cap at described shell sets rubber seal plug, positive wire hole is had beyond the Great Wall in described rubber seal, described positive wire stretches out from described positive wire hole, and the described positive wire stretched out and described negative wire are welded on described pcb board;

Described for driving the LED drive power of LED also to include 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.

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 LED drive power, and stable performance, work long hours the electrical property remaining to keep good, can extend the service life of LED drive power.

Filter capacitor is built-in with electric discharge Chip-R, when, after dump, Chip-R can bleed off the electricity being stored in capacitor core in a short period of time, and the voltage of capacitor core is reduced to zero, from without at filter capacitor two ends parallel connection bleeder resistance, the circuit making driving power supply is more succinct.And it also avoid owing to capacitor core is charged, the danger of the human body that shocks by electricity after human body touch, safety is high.

Between the shell inner cavity and capacitor element of filter capacitor, it is filled with epoxy resin, shell can be propped up so that it is be unlikely to deform, and insulation effect is good, moreover it is possible to protective condenser element, it is prevented that short circuit or electric leakage, make LED drive device safer.

Accompanying drawing explanation

Fig. 1 is the circuit diagram of the LED drive power for driving LED of the present invention;

Fig. 2 is the sectional view of the capacitor core for driving the filter capacitor in the LED drive power of LED of the present invention;

Fig. 3 is the sectional view for driving the filter capacitor in the LED drive power of LED 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 power for driving LED of the present invention:

This for driving the LED drive power of LED to include 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, 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, and constitute a full-wave voltage doubler.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 50, positive wire 40 and electric discharge Chip-R 30, and described Chip-R is in parallel with described capacitor core 20.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 50 is copper wire.

Being provided with positive terminal pad and negative terminal pad on capacitor core 20, the positive pole of Chip-R 30 is welded on positive terminal pad, and the negative pole of Chip-R 30 is welded in negative terminal pad.When, after dump, Chip-R 30 can bleed off the electricity being stored in capacitor core 20 in a short period of time, and the voltage of capacitor core 20 is reduced to zero, from without at filter capacitor two ends parallel connection bleeder resistance, the circuit making driving power supply is more succinct.And it also avoid owing to capacitor core 20 is charged, the danger of the human body that shocks by electricity after human body touch, safety is high.

Shell 10 is the shell of one end open, the other end at shell 10 has negative wire hole, capacitor core 20 loads in shell 10 from the opening of shell 10, negative wire 50 stretches out from negative wire hole, being filled with epoxy resin between shell 10 inner chamber and capacitor element, the open end cap at shell 10 sets rubber seal plug 60, has positive wire hole on rubber seal plug 60, positive wire 40 stretches out from positive wire hole, and the positive wire 40 and the negative wire 50 that stretch out are welded on pcb board.

This filter capacitor when identical pressure and capacitance, its small volume, can reduce the volume being used for driving the LED drive power of LED, 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 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 power being used for driving LED; 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 aluminium shell and the capacitor element being placed in described shell,Described capacitor element includes capacitor core、Negative wire、Positive wire and electric discharge Chip-R,Described Chip-R is in parallel with described capacitor core,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 to positive terminal in described tantalum powder sintering block positive electrode substrate,Described positive wire welds with described tantalum wire,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 negative wire is welded on the negative pole end of described capacitor core,It is electrically connected with described solid electrolyte MnO2 layer;Being provided with positive terminal pad and negative terminal pad on described capacitor core, the positive pole of described Chip-R is welded on described positive terminal pad, and the negative pole of described Chip-R is welded in described negative terminal pad;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, it is filled with epoxy resin between described shell inner cavity and described capacitor element, open end cap at described shell sets rubber seal plug, positive wire hole is had beyond the Great Wall in described rubber seal, described positive wire stretches out from described positive wire hole, and the described positive wire stretched out and described negative wire are welded on described pcb board;
Described for driving the LED drive power of LED also to include 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.
2. according to claim 1 for driving the LED drive power of LED, it is characterised in that described input protection circuit is made up of a fuse.
3. according to claim 1 for driving the LED drive power of LED, 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. according to claim 4 for driving the LED drive power of LED, it is characterised in that described decompression capacitor is polypropylene film electric capacity.
CN201610195170.9A 2016-03-31 2016-03-31 Light emitting diode (LED) driving power supply for driving LED CN105810438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610195170.9A CN105810438A (en) 2016-03-31 2016-03-31 Light emitting diode (LED) driving power supply for driving LED

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610195170.9A CN105810438A (en) 2016-03-31 2016-03-31 Light emitting diode (LED) driving power supply for driving LED

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CN105810438A true CN105810438A (en) 2016-07-27

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Citations (5)

* Cited by examiner, † Cited by third party
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
CN203181275U (en) * 2012-12-31 2013-09-04 陈榕锦 LED drive circuit
CN103700501A (en) * 2013-12-17 2014-04-02 中国振华(集团)新云电子元器件有限责任公司 Leading-out process for anode and cathode of end cap-type tantalum capacitor
CN104916435A (en) * 2015-06-28 2015-09-16 吕杨 Capacitor

Patent Citations (5)

* Cited by examiner, † Cited by third party
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
CN203181275U (en) * 2012-12-31 2013-09-04 陈榕锦 LED drive circuit
CN103700501A (en) * 2013-12-17 2014-04-02 中国振华(集团)新云电子元器件有限责任公司 Leading-out process for anode and cathode of end cap-type tantalum capacitor
CN104916435A (en) * 2015-06-28 2015-09-16 吕杨 Capacitor

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
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: 20160727