CN107708260B - A kind of circuit changing DC low-voltage end by alternating current interval on-off number - Google Patents
A kind of circuit changing DC low-voltage end by alternating current interval on-off number Download PDFInfo
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- CN107708260B CN107708260B CN201711029529.6A CN201711029529A CN107708260B CN 107708260 B CN107708260 B CN 107708260B CN 201711029529 A CN201711029529 A CN 201711029529A CN 107708260 B CN107708260 B CN 107708260B
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- circuit
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- alternating current
- conversion
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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]
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Abstract
The invention discloses a kind of circuits for changing DC low-voltage end by alternating current interval on-off number comprising 220V AC voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit, secondary ac-dc conversion and decompression rectifier filter circuit, electronic switch, MCU control circuit, pulse-width modulation circuit；220V AC voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit electric connection, secondary ac-dc conversion and decompression rectifier filter circuit and is sequentially connected electrically；MCU control circuit and π type filter and peak absorbing circuit is electrically connected, and pulse-width modulation circuit is electrically connected with MCU control circuit；Output end includes a cathode output end, two cathode output ends, and each cathode output end is electrically connected an electronic switch.It is designed by foregoing circuit, the present invention has the advantages that novel in design and can be realized any combination direct voltage output.
Description
Technical field
The present invention relates to electronic technology fields, more particularly to one kind to change DC low-voltage by alternating current interval on-off number
The circuit at end.
Background technique
In the prior art, it such as applied to the control circuit etc. in LED light, generally requires the alternating current of alternating current 220V
It is converted into stablizing the voltage dc of output.
In the prior art, existing conversion circuit is only able to achieve a kind of direct voltage output；For requiring illumination condition
For the LED light of variation, foregoing circuit structure is difficult to be applicable in.
Summary of the invention
The purpose of the present invention is to provide a kind of circuits for changing DC low-voltage end by alternating current interval on-off number, should
Change the circuit design novelty at DC low-voltage end by alternating current interval on-off number and can be realized any combination DC voltage
Output.
In order to achieve the above objectives, the present invention is achieved through the following technical solutions.
A kind of circuit changing DC low-voltage end by alternating current interval on-off number includes 220V AC voltage conversion
At DC voltage circuit, the filtering of π type and peak absorbing circuit, secondary ac-dc conversion and decompression rectifier filter circuit, electronic cutting
Pass, MCU control circuit, pulse-width modulation circuit, output end；
220V AC voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit electric connection, secondary friendship directly
Rheology is changed and decompression rectifier filter circuit is sequentially connected electrically；
MCU control circuit and π type filter and peak absorbing circuit is electrically connected, pulse-width modulation circuit and MCU control circuit
Electrical connection；
Output end includes a cathode output end, two cathode output ends, and each cathode output end is electrically connected an electronics
Switch, cathode output end and each electronic switch are filtered with pulse-width modulation circuit, secondary ac-dc conversion and step-down rectifier respectively
Circuit electrical connection.
Wherein, the π type filtering and peak absorbing circuit are made of π type filter circuit, peak absorbing circuit.
Wherein, the secondary ac-dc conversion and decompression rectifier filter circuit are whole by secondary ac-dc conversion circuit, decompression
Flow filter circuit composition.
The invention has the benefit that one kind of the present invention changes DC low-voltage by alternating current interval on-off number
The circuit at end comprising there is 220V AC voltage to be converted into DC voltage circuit, the filtering of π type and peak absorbing circuit, secondary friendship
DC converting and decompression rectifier filter circuit, electronic switch, MCU control circuit, pulse-width modulation circuit, output end；220V exchange
Voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit electric connection, secondary ac-dc conversion and step-down rectifier
Filter circuit is sequentially connected electrically；MCU control circuit and π type filter and peak absorbing circuit is electrically connected, pulse-width modulation circuit with
MCU control circuit electrical connection；Output end includes a cathode output end, two cathode output ends, and each cathode output end is electric respectively
Connect an electronic switch, cathode output end and each electronic switch respectively with pulse-width modulation circuit, secondary ac-dc conversion and drop
Press current rectifying and wave filtering circuit electrical connection.It is designed by foregoing circuit, the present invention has novel in design and to can be realized any combination straight
The advantages of flowing voltage output.
Detailed description of the invention
The present invention is further detailed below with attached drawing, but the embodiment in attached drawing is not constituted to this hair
Bright any restrictions.
Fig. 1 is circuit block diagram of the invention.
Fig. 2 is circuit structure diagram of the invention.
Specific embodiment
Below with reference to specific embodiment, the present invention will be described.
As depicted in figs. 1 and 2, a kind of circuit changing DC low-voltage end by alternating current interval on-off number includes
220V AC voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit, secondary ac-dc conversion and step-down rectifier
Filter circuit, electronic switch, MCU control circuit, pulse-width modulation circuit.
Further, 220V AC voltage is converted into DC voltage circuit, π type filters and peak absorbing circuit electrically connects
It connects, secondary ac-dc conversion and decompression rectifier filter circuit are sequentially connected electrically.
Further, MCU control circuit and π type filter and peak absorbing circuit is electrically connected, pulse-width modulation circuit with
MCU control circuit electrical connection.
Wherein, output end includes a cathode output end, two cathode output ends, and each cathode output end is electrically connected one
Electronic switch, cathode output end and each electronic switch respectively with pulse-width modulation circuit, secondary ac-dc conversion and step-down rectifier
Filter circuit electrical connection.
It need to be explained further, the π type filtering and peak absorbing circuit are made of π type filter circuit, peak absorbing circuit.
In addition, the secondary ac-dc conversion and decompression rectifier filter circuit are whole by secondary ac-dc conversion circuit, decompression
Flow filter circuit composition.
The present invention can control the on off operating mode of corresponding cathode output end by electronic switch, wherein electronic switch
For triode switch.In the course of work of the present invention, any one cathode output end can be combined with cathode output end and
Realize direct voltage output.
Based on the above situation, it may be appreciated that being designed by foregoing circuit structure, the present invention, which has novel design and can be realized, to be appointed
The advantages of meaning combination direct voltage output.
The above is only a preferred embodiment of the present invention, for those of ordinary skill in the art, according to the present invention
Thought, there will be changes in the specific implementation manner and application range, and the content of the present specification should not be construed as to the present invention
Limitation.
Claims (3)
1. a kind of circuit for changing DC low-voltage end by alternating current interval on-off number, it is characterised in that: include that 220V is handed over
Galvanic electricity pressure is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit, secondary ac-dc conversion and step-down rectifier filtered electrical
Road, electronic switch, MCU control circuit, pulse-width modulation circuit, output end；
220V AC voltage is converted into DC voltage circuit, the filtering of π type and peak absorbing circuit electric connection, secondary alternating current-direct current and becomes
It changes and decompression rectifier filter circuit is sequentially connected electrically；
MCU control circuit and π type filter and peak absorbing circuit is electrically connected, and pulse-width modulation circuit is electrically connected with MCU control circuit
It connects；
Output end includes a cathode output end, two cathode output ends, and each cathode output end is electrically connected an electronic switch,
Cathode output end and each electronic switch are electric with pulse-width modulation circuit, secondary ac-dc conversion and decompression rectifier filter circuit respectively
Connection.
2. a kind of circuit for changing DC low-voltage end by alternating current interval on-off number according to claim 1, special
Sign is: the π type filtering and peak absorbing circuit are made of π type filter circuit, peak absorbing circuit.
3. a kind of circuit for changing DC low-voltage end by alternating current interval on-off number according to claim 1, special
Sign is: the secondary ac-dc conversion and decompression rectifier filter circuit are filtered by secondary ac-dc conversion circuit, step-down rectifier
Circuit composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711029529.6A CN107708260B (en) | 2017-10-30 | 2017-10-30 | A kind of circuit changing DC low-voltage end by alternating current interval on-off number |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711029529.6A CN107708260B (en) | 2017-10-30 | 2017-10-30 | A kind of circuit changing DC low-voltage end by alternating current interval on-off number |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107708260A CN107708260A (en) | 2018-02-16 |
| CN107708260B true CN107708260B (en) | 2019-02-19 |
Family
ID=61176497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711029529.6A Active CN107708260B (en) | 2017-10-30 | 2017-10-30 | A kind of circuit changing DC low-voltage end by alternating current interval on-off number |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107708260B (en) |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202142003U (en) * | 2011-08-05 | 2012-02-08 | 深圳市力可普尔电子有限公司 | Laptop power adapter |
| CN102386661A (en) * | 2011-12-07 | 2012-03-21 | 中国人民解放军总装备部军械技术研究所 | Portable electrifying, charging and discharging equipment for photoelectric device |
| CN104022661B (en) * | 2014-06-11 | 2017-02-15 | 合肥工业大学 | Switching power supply for AC/DC-DC self-adaptive instrument within ultra-wide voltage input range |
| CN204350367U (en) * | 2014-12-11 | 2015-05-20 | 深圳市固特亮照明有限公司 | Radio frequency light modulation LED power supply |
| KR101708400B1 (en) * | 2016-07-18 | 2017-02-20 | 엘이디라이팅 주식회사 | A LED lamp for multistage illumination by detecting the power-off |
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2017
- 2017-10-30 CN CN201711029529.6A patent/CN107708260B/en active Active
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| Publication number | Publication date |
|---|---|
| CN107708260A (en) | 2018-02-16 |
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Xu Feng Inventor after: Huang Lina Inventor before: Xu Feng |
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| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |