CN203554752U - A switching power supply apparatus for light-emitting diode illumination - Google Patents
A switching power supply apparatus for light-emitting diode illumination Download PDFInfo
- Publication number
- CN203554752U CN203554752U CN201320656948.3U CN201320656948U CN203554752U CN 203554752 U CN203554752 U CN 203554752U CN 201320656948 U CN201320656948 U CN 201320656948U CN 203554752 U CN203554752 U CN 203554752U
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- China
- Prior art keywords
- voltage
- switching power
- converter
- power supply
- supply apparatus
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- 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.)
- Expired - Lifetime
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- 238000005286 illumination Methods 0.000 title abstract 3
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 6
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- 230000000694 effects Effects 0.000 description 2
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- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 101100443763 Mus musculus Dock7 gene Proteins 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Images
Classifications
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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
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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]
-
- 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
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model provides a switching power supply apparatus for light-emitting diode illumination. The switching power supply apparatus is capable of providing DC voltage with obviously-decreased noise or ripples, minimizing increase in the size of the apparatus, and providing DC voltage with excellent quality. The switching power supply apparatus for light-emitting diode illumination comprises a rectifying portion which converts commonly-used AC voltage into DC voltage, a smoothening portion which smoothens DC voltage outputted from the rectifying portion, a switching portion which performs switching operation based on an inputted control signal and which transmits electric energy of the smoothening portion to a grounding end when switched on or to a side of a DC-DC converter disposed at a rear end when switched off, and a thin-film capacitor configured between the switching portion and the DC-DC converter and connected with the input end of the DC-DC converter in parallel.
Description
Technical field
The utility model relates to a kind of switching power unit, a kind of in more detail switching power unit of being good at processing noise or ripple.
Background technology
Conventionally, in the multiple place that comprises family or office, adopting widely fluorescent lamp and incandescent lamp is ligthing paraphernalia, and the multiple place beyond it adopts and to comprise above-mentioned fluorescent lamp and incandescent lamp, as the lighting device of various kinds such as sodium vapor lamp or mercury lamp.
But, when there is a lot of difficulty during manufacture, along with switch and have the problem of the large and longevity of power consumption frequently again repeatedly in lighting device as described above.
On the other hand, recently in multi industries field, the multiple product of application light-emitting diode is developed and is suitable for, especially the LED light lamp of high brightness, there is the life-span semipermanent, therefore the advantages such as power consumption is very low, can replace comprising the multiple electric light of existing fluorescent lamp or incandescent lamp, sodium vapor lamp, mercury lamp.
That is, by LED light lamp, can replace comprising various harmful substances, the existing electric light that the life-span is short, thus reduce environmental pollution, again by the low power consumption of LED light lamp, also can access the effect of reducing energy.
But, the driving of LED light lamp, will commonly use ac voltage rectifier is direct voltage, utilize switching power unit, the direct voltage of rectification is promoted to the size of regulation, utilize DC-DC converter, the direct voltage boosting is suitably regulated, and be applied to LED light lamp.
At this moment, utilize switching power unit, the direct voltage of rectification is boosted, so booster voltage comprises huge ripple, this performance to LED light lamp is brought bad influence.In order to address the above problem, at the input of DC-DC converter, with parallel way, adopted electrolytic capacitor in the past.Adopt the reason of electrolytic capacitor to be, with respect to static capacity, size is less, and dielectric loss is less.But, in the characteristic of electrolytic capacitor, there is following shortcoming: fragile to noise or ripple, and cannot provide quality outstanding direct voltage to DC-DC converter.
Utility model content
The purpose of this utility model is, provides a kind of the obviously LED lighting switching power unit of the direct voltage of minimizing of noise or ripple can be provided.
And another object of the present utility model is, provides a kind of the size increase of device is minimized, and the LED lighting switching power unit of the direct voltage of outstanding quality can be provided again.
LED lighting switching power unit of the present utility model, it is characterized in that for LED lighting, comprising: rectification part, will commonly use AC voltage conversion and become direct voltage; Partes glabra, to carrying out smoothly from the direct voltage of rectification part output; Switch portion, is configured in above-mentioned partes glabra and is located between the DC-DC converter of rear end of switch portion, by control signal that inputted, is controlled, and carries out switch; And film capacitor, be configured between above-mentioned switch portion and above-mentioned DC-DC converter, and in parallel with the input of above-mentioned DC-DC converter.
According to LED lighting switching power unit of the present utility model, the direct voltage that can provide noise or ripple obviously to reduce, and the size increase of device is minimized, can improve again the quality of direct voltage.
Accompanying drawing explanation
Fig. 1 is the integrated circuit figure of switching power unit for the LED lighting of the utility model one embodiment.
Embodiment
Below, with reference to accompanying drawing, preferred embodiment of the present utility model is described in detail.First, during to the structural element attached drawings mark of each accompanying drawing, with regard to identical structural element, even if be illustrated in different accompanying drawings, also adopt identical Reference numeral as far as possible.
Fig. 1 is the integrated circuit figure of switching power unit for the LED lighting of the utility model one embodiment.
Reference numeral 1 shown in Fig. 1 represents input ac voltage, and Reference numeral 2 represents the rectification part consisting of bridge diode.And Reference numeral R1 and R2 represent the divider resistance that smoothed voltage division is provided, what T1 represented is the transformer as the choke inductor (choke induvtor) for correcting power factors.
And, Q1 represents to adopt N-shaped mos field effect transistor (NMOSFET, n-Metal-Oxide-Semiconductor Field-Effect Transistor) switching device, IC1 represents to receive the power factor correction integrated circuit that each detection signal carrys out the work of control circuit, and Reference numeral 3 represents the DC-DC converter that output is connected with load (load).
Reference numeral 4 represents that Reference numeral 5 represents switch portion to carrying out level and smooth partes glabra from the direct voltage of rectification part output.
In integrated circuit (IC) 1, " Mnlt " terminal represents from divider resistance R1, R2 receives by the voltage of dividing potential drop, and detect the terminal whether input voltage exists, " CS " terminal represents to be connected with the source terminal of switching device Q1, and current sensor, thereby the terminal of the open/close state of sense switch device Q1, " ZCD " terminal represents to be connected with the second coil of transformer T1, and detect the terminal of zero current, " GND " terminal represents earth terminal, " Out " terminal represents output voltage terminal, " Vcc " terminal represents input voltage terminal, " FB " terminal represents splicing ear, " Compen " terminal represents splicing ear, .
And in Fig. 1, undeclared Reference numeral D1, D2 represent diode, C2, C3, C4 represent capacitor, and wherein C4 is film capacitor 6, and R3, R4, F5 represent resistance.
The utility model with said structure is LED lighting switching power unit, and it is for LED lighting, and this switching power unit, comprising: rectification part 2, and will commonly use AC voltage conversion and become direct voltage; Partes glabra 4, to carrying out smoothly from the direct voltage of rectification part output;
Switch portion 5, is configured in above-mentioned partes glabra and is located between the DC-DC converter 3 of rear end of switch portion 5, by control signal that inputted, is controlled, and carries out switch; And
Film capacitor 6, is configured between above-mentioned switch portion and above-mentioned DC-DC converter 3, and in parallel with the input of above-mentioned DC-DC converter 3.
The LED lighting of the utility model embodiment is as follows with the job description of switching power unit.
Transformer T1, by the ZCD terminal of integrated circuit (IC) 1, senses the coil voltage producing on the first coil, this first coil winding W1.At this moment, if the voltage that the ZCD terminal by integrated circuit (IC) 1 senses is zero (zero), integrated circuit (IC) 1 output control signal, opens (on) switching device Q1.
On the other hand, LED lighting switching power unit of the present utility model, employing has the discontinuous current pattern mode of the switching frequency of 20～70kHz.At this, discontinuous current pattern (Discontinuous Current Mode), for the those of ordinary skill of being engaged in field of power electronics, it is apparent term, in the little situation of the induction coefficient of inductor, can exist the electric current circulating on inductor to become zero state, exist the pattern of this state to be called discontinuous current pattern.That is, LED lighting switching power unit of the present utility model, has the mode of operation that exists the electric current that circulates on choke inductor to become zero state.
The applicant, in view of LED lighting of the present utility model adopts discontinuous current pattern and carries out HF switch work with switching power unit, replaces the applicable film capacitor 6 of electrolytic capacitor.That is, switching frequency is higher, and increasing because series reactance of equal value makes impedance of capacitor 6, is therefore suitable for series reactance value of equal value and the relatively low film capacitor of series inductance coefficient value.
But, in the situation of formed objects, the static capacity of film capacitor 6 only reaches 1/10 left and right of the static capacity of electrolytic capacitor, need in the situation of identical static capacity, need to prepare the receiving space of 10 times nearly, the dielectric loss of film capacitor 6 is also large than the dielectric loss of electrolytic capacitor, therefore, roughly uses as power supply use.
But, the utlity model has following effect: the static capacity of the film capacitor 6 in parallel with the input of DC-DC converter, if the static capacity during with respect to employing electrolytic capacitor, reaching 10%～40% left and right just can provide the DC power supply of outstanding quality.
Claims (1)
1. a LED lighting switching power unit, it is for LED lighting,
It is characterized in that, comprising:
Rectification part, will commonly use AC voltage conversion and become direct voltage;
Partes glabra, to carrying out smoothly from the direct voltage of rectification part output;
Switch portion, is configured in above-mentioned partes glabra and is located between the DC-DC converter of rear end of switch portion, by control signal that inputted, is controlled, and carries out switch; And
Film capacitor, is configured between above-mentioned switch portion and above-mentioned DC-DC converter, and in parallel with the input of above-mentioned DC-DC converter.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2020130004426U KR20140006199U (en) | 2013-05-31 | 2013-05-31 | Switching power supply for led lamp |
| KR20-2013-0004426 | 2013-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203554752U true CN203554752U (en) | 2014-04-16 |
Family
ID=50472809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320656948.3U Expired - Lifetime CN203554752U (en) | 2013-05-31 | 2013-10-23 | A switching power supply apparatus for light-emitting diode illumination |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR20140006199U (en) |
| CN (1) | CN203554752U (en) |
-
2013
- 2013-05-31 KR KR2020130004426U patent/KR20140006199U/en not_active Application Discontinuation
- 2013-10-23 CN CN201320656948.3U patent/CN203554752U/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140006199U (en) | 2014-12-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140416 |
|
| CX01 | Expiry of patent term |