CN103582202A - Led power supply circuit - Google Patents
Led power supply circuit Download PDFInfo
- Publication number
- CN103582202A CN103582202A CN201210266444.0A CN201210266444A CN103582202A CN 103582202 A CN103582202 A CN 103582202A CN 201210266444 A CN201210266444 A CN 201210266444A CN 103582202 A CN103582202 A CN 103582202A
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- Prior art keywords
- circuit
- filter
- voltage
- power supply
- rectifier bridge
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Abstract
An embodiment of the invention discloses an LED power supply circuit which comprises a voltage reducing circuit, a filter, a rectifier bridge, a valley fill circuit and two groups of LED loads. The voltage reducing circuit consists of a resistor and a capacitor which are connected in parallel and is connected to the input end in series, the filter is an LC filter and performs high-frequency filtering on reduced voltage, the rectifier bridge performs full-wave rectification on filtered voltage, the valley fill circuit is connected to the rectified voltage output end of the rectifier bridge in parallel, and two groups of LED loads are of same-number structures and connected to the output end. By adopting the LED power supply circuit, input pulsating wave forms can be rectified, and the circuit power can be improved to be higher than 0.9. In addition, the LED power supply circuit can be combined with different forms of loads.
Description
Technical field
The present invention relates to a kind of LED power supply circuits.
Background technology
Development of Power Electronic Technology is rapid at present, utilize power factor correction technology can make to exchange input current waveform and approach AC-input voltage waveform, and reach voltage same-phase, be that load is equivalent to resistive load, and emphasizer circuit is divided into active and passive two kinds, large capacity inductance capacitance is used in passive correction conventionally, causes volume excessive, and active correction has the advantages such as volume is little, lightweight.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of LED power supply circuits are provided.Can provide a volume little, the LED power supply circuits of High Power Factor, load capable of being combined.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of LED power supply circuits, comprise reduction voltage circuit, filter, rectifier bridge, fill out paddy circuit, LED load, described reduction voltage circuit is that resistance, Capacitance parallel connection composition are serially connected with input, filter is LC filter, and the voltage after step-down is carried out to High frequency filter, and rectifier bridge is to filtered voltage full-wave rectification, fill out on the commutating voltage output that paddy circuit is parallel to rectifier bridge, LED load is two groups and accesses output with quantitative structure.
Implement the embodiment of the present invention, there is following beneficial effect: can correct input pulsating waveform, the power of circuit is brought up to more than 0.9, and multi-form load capable of being combined.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below the present invention is described in further detail.
With reference to the circuit theory diagrams of the present invention shown in Fig. 1.
The present invention includes reduction voltage circuit, filter, rectifier bridge, fill out paddy circuit, LED load, reduction voltage circuit is that the serial connection that resistance R 1, capacitor C 1 parallel connection form enters voltage input end, filter is the high frequency filter that inductance L 1, capacitor C 2 form, filtering HFS, wherein connect with reduction voltage circuit in inductance L 1 one end, capacitor C 2 is parallel between inductance L 1 other end and negative line, as shown in the figure.
Rectifier bridge DB1 carries out full-wave rectification to filtered electric current, and exports rectified current.
The positive pole of filling out negative electrode that paddy circuit is a diode D1, electrochemical capacitor C3 connects the positive output end of rectifier bridge DB1, the negative pole of the anode of diode D1, electrochemical capacitor C3 connects respectively the positive pole of electrochemical capacitor C4, the negative electrode of diode D1, the anode of the negative pole of electrochemical capacitor C4, diode D3 is connected with the negative output terminal of rectifier bridge DB1, and the negative pole of the anode of D1, electrochemical capacitor C3 connects respectively negative electrode, the anode of diode D2.
LED load is two groups of equal number or equivalent some LED lamps combinations with impedance, can combine according to practical application.
Above disclosed is only a kind of preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (1)
1. LED power supply circuits, it is characterized in that, comprise reduction voltage circuit, filter, rectifier bridge, fill out paddy circuit, LED load, described reduction voltage circuit is that resistance, Capacitance parallel connection composition are serially connected with input, filter is LC filter, and the voltage after step-down is carried out to High frequency filter, and rectifier bridge is to filtered voltage full-wave rectification, fill out on the commutating voltage output that paddy circuit is parallel to rectifier bridge, LED load is two groups and accesses output with quantitative structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210266444.0A CN103582202A (en) | 2012-07-30 | 2012-07-30 | Led power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210266444.0A CN103582202A (en) | 2012-07-30 | 2012-07-30 | Led power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103582202A true CN103582202A (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210266444.0A Pending CN103582202A (en) | 2012-07-30 | 2012-07-30 | Led power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103582202A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079188A (en) * | 2014-06-18 | 2014-10-01 | 广州金升阳科技有限公司 | Flyback switching power circuit |
| CN104079188B (en) * | 2014-06-18 | 2016-11-30 | 广州金升阳科技有限公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN109412117A (en) * | 2018-12-06 | 2019-03-01 | 广州金升阳科技有限公司 | A kind of protection circuit against input over-voltage |
-
2012
- 2012-07-30 CN CN201210266444.0A patent/CN103582202A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104079188A (en) * | 2014-06-18 | 2014-10-01 | 广州金升阳科技有限公司 | Flyback switching power circuit |
| CN104079188B (en) * | 2014-06-18 | 2016-11-30 | 广州金升阳科技有限公司 | A kind of inverse-excitation type switch power-supply circuit |
| CN109412117A (en) * | 2018-12-06 | 2019-03-01 | 广州金升阳科技有限公司 | A kind of protection circuit against input over-voltage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140212 |