CN203801102U - LED power supply - Google Patents
LED power supply Download PDFInfo
- Publication number
- CN203801102U CN203801102U CN201320370961.2U CN201320370961U CN203801102U CN 203801102 U CN203801102 U CN 203801102U CN 201320370961 U CN201320370961 U CN 201320370961U CN 203801102 U CN203801102 U CN 203801102U
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- CN
- China
- Prior art keywords
- thermistor
- circuit
- current
- power supply
- led
- 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.)
- Expired - Fee Related
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The utility model discloses an LED power supply and belongs to electronic field. The LED power supply comprises a rectification circuit, a thermistor current-limiting circuit, and a filter circuit. One end of the rectification circuit is connected with commercial power and the other end of the rectification circuit is connected with the thermistor current-limiting circuit. The other end of the thermistor current-limiting circuit is connected with the filter circuit. The other end of the filter circuit is connected with an LED lamp and used for filtering current inputted into the LED lamp. Using common cheap passive electronic elements, the LED power supply may operate high efficiently with relative constant current when the commercial power varies from 200 to 250V. Additionally, the LED power supply can be directly driven by the commercial power, prevents switching elements and electromagnetic interference, facilitates batch production, greatly improves production efficiency and product reliability, and obviously decreases cost and failure rate.
Description
Technical field
The utility model belongs to electronic applications, relates to a kind of LED power supply.
Background technology
The advantage that light-emitting diode (LED, Light Emitting Diode) is used in public sphere has been well-known.Due to the inherent characteristics of LED, must carry out constant current control to LED light source, for it provides constant operating current.
Existing LED power supply generally adopts Switching Power Supply converter technique, cheap products is often even omitted electromagnetic interference suppression circuit by simplification and is reduced costs, so can produce serious electromagnetic interference to electrical network while applying in batches, high-quality Switching Power Supply general structure is complicated, failure rate and high expensive.
Utility model content
The utility model is in order to reduce costs and to improve product reliability, a kind of LED power supply of applicable batch production is provided, this power supply comprises rectification circuit, thermistor current-limiting circuit and filter circuit, described rectification circuit one end connects civil power, the other end connects described thermistor current-limiting circuit, the other end of described thermistor current-limiting circuit connects filter circuit, for limiting the electric current after described rectification circuit rectification, the other end of described filter circuit connects LED lamp, for the electric current of input LED lamp is carried out to filtering processing; Described rectification circuit comprises rectifier bridge, described thermistor current-limiting circuit comprises current limliting divider resistance and thermistor, described current limliting divider resistance and described thermistor are connected in parallel, described filter circuit comprises filter capacitor, described thermistor one end connects described rectifier bridge, and the other end connects described filter capacitor.
As such scheme preferably, the thermistor in described thermistor current-limiting circuit is specially PTC thermistor, the resistance of this PTC thermistor can increase with the rising of temperature.
The beneficial effect that the technical scheme that the utility model provides is brought is: this LED power acquisition builds and forms with common cheap passive electronic components, can directly drive while guaranteeing that LED light source changes within the scope of civil power 200-250 with relatively constant electric current efficiency operation with civil power, intrinsic property by thermistor is controlled flowing through the electric current of LED light source, and the electric current of LED light source is crossed in stable flow within the specific limits.Whole circuit, without adjustable element, does not have switching device yet, without electromagnetic interference, is convenient to batch production, can greatly enhance productivity and product reliability, can be significantly reduced to originally and failure rate.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, to the accompanying drawing using in embodiment be briefly described below, apparently, below listed accompanying drawing be only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the structural representation of the LED power supply of proposition in the present embodiment 1;
Fig. 2 be the LED power supply that proposes in the present embodiment 1 another structural representation.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing, the utility model execution mode is described in further detail.
Embodiment 1
Participate in Fig. 1, the present embodiment proposes a kind of LED power supply, described power supply comprises rectification circuit 101, thermistor current-limiting circuit 102 and filter circuit 103, described rectification circuit 101 one end connect civil power, the other end connects described thermistor current-limiting circuit 102, the other end of described thermistor current-limiting circuit 102 connects filter circuit 103, and the other end of described filter circuit 103 connects LED lamp, for the electric current of input LED lamp is carried out to filtering processing.
Further, as shown in Figure 2, described rectification circuit comprises rectifier bridge, and described thermistor current-limiting circuit comprises current limliting divider resistance and thermistor, described thermistor connects respectively described rectification circuit and filter circuit, and described current limliting divider resistance and described thermistor are connected in parallel; Described filter circuit comprises filter capacitor.Particularly, described thermistor one end connects described rectifier bridge, and the other end connects described filter capacitor, and described current limliting divider resistance and described thermistor are connected in parallel.
Further, the thermistor in described thermistor current-limiting circuit is specially PTC(Positive Temperature Coefficient, positive temperature coefficient) thermistor, this PTC thermistor has the rising of electrical resistance temperature and the characteristic that increases.
In the present embodiment, LED+ end and LED-end in LED light source place in circuit form loop, by filter capacitor in parallel with it, carry out capacitor filtering, export metastable direct voltage, to keep the voltage stabilization of LED power supply.
In the present embodiment, when the voltage of power supply raises, flowing through thermistor electric current along separate routes will increase, the heating power of thermistor increases, thereby the resistance of thermistor itself will increase, and then limit the electric current increase of flowing through loop, make the electric current in loop keep within the specific limits relatively constant.
When power supply lower voltage, flowing through thermistor electric current along separate routes will reduce, and the heating power of thermistor reduces, thereby the resistance of thermistor itself will reduce, and then the electric current in limit circuit reduces, make electric current in loop keep within the specific limits stable.
The LED power supply that the present embodiment provides, adopting common cheap passive electronic components to build forms, can directly drive while guaranteeing that LED light source changes within the scope of civil power 200-250 with relatively constant electric current efficiency operation with civil power, intrinsic property by thermistor is controlled flowing through the electric current of LED light source, and the electric current of LED light source is crossed in stable flow within the specific limits.Whole circuit, without adjustable element, does not have switching device yet, without electromagnetic interference, is convenient to batch production, can greatly enhance productivity and product reliability, can be significantly reduced to originally and failure rate.
Finally it should be noted that: above embodiment only, in order to the technical solution of the utility model to be described, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (2)
1. a LED power supply, it is characterized in that, specifically comprise rectification circuit, thermistor current-limiting circuit and filter circuit, described rectification circuit one end connects civil power, the other end connects described thermistor current-limiting circuit, and the other end of described thermistor current-limiting circuit connects filter circuit, for limiting the electric current after described rectification circuit rectification, the other end of described filter circuit connects LED lamp, for the electric current of input LED lamp is carried out to filtering processing; Described rectification circuit comprises rectifier bridge, described thermistor current-limiting circuit comprises current limliting divider resistance and thermistor, described current limliting divider resistance and described thermistor are connected in parallel, described filter circuit comprises filter capacitor, described thermistor one end connects described rectifier bridge, and the other end connects described filter capacitor.
2. a kind of LED power supply according to claim 1, is characterized in that, the thermistor in described thermistor current-limiting circuit is specially PTC thermistor, and the resistance of this PTC thermistor can increase with the rising of temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320370961.2U CN203801102U (en) | 2013-06-26 | 2013-06-26 | LED power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320370961.2U CN203801102U (en) | 2013-06-26 | 2013-06-26 | LED power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203801102U true CN203801102U (en) | 2014-08-27 |
Family
ID=51383285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320370961.2U Expired - Fee Related CN203801102U (en) | 2013-06-26 | 2013-06-26 | LED power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203801102U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954022A (en) * | 2017-05-22 | 2018-12-07 | 通用电气照明解决方案有限公司 | LED light and temperature-control circuit applied to the LED light |
-
2013
- 2013-06-26 CN CN201320370961.2U patent/CN203801102U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108954022A (en) * | 2017-05-22 | 2018-12-07 | 通用电气照明解决方案有限公司 | LED light and temperature-control circuit applied to the LED light |
| CN108954022B (en) * | 2017-05-22 | 2021-07-23 | 卡任特照明解决方案有限公司 | LED lamp and temperature control circuit applied to same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140827 Termination date: 20160626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |