CN104105271A - Automatic LED series-parallel connection switching circuit - Google Patents
Automatic LED series-parallel connection switching circuit Download PDFInfo
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- CN104105271A CN104105271A CN201410378642.5A CN201410378642A CN104105271A CN 104105271 A CN104105271 A CN 104105271A CN 201410378642 A CN201410378642 A CN 201410378642A CN 104105271 A CN104105271 A CN 104105271A
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Abstract
The invention discloses an automatic LED (Light Emitting Diode) series-parallel connection switching circuit. The automatic LED series-parallel connection switching circuit comprises a power input terminal and a plurality of LEDs; the power input end comprises a direct-current positive input terminal, a direct-current negative input terminal, an alternating-current driver module positive input terminal and an alternating-current driver module negative input terminal; the plurality of LEDs are orderly connected in series between the alternating-current driver module positive input terminal and the alternating-current driver module negative input terminal, and a diode is connected in series between every two adjacent LEDs; a diode is connected in series between the direct-current positive input terminal and the anode of each LED, while a diode is connected in series between the cathode of each LED and the direct-current negative input terminal. The automatic LED series-parallel connection switching circuit is simple in structure and capable of switching the series-parallel connection modes of a plurality of LEDs by changing input contacts.
Description
Technical field
The present invention relates to electronic circuit technology field, particularly a kind of circuit that carries out the automatic conversion of connection in series-parallel according to input.
Background technology
LED light source has the advantages such as luminous efficiency is high, long service life and is widely used because of it.LED light-emitting diode has the characteristic of low voltage drive, therefore can directly use lithium battery power supply, realize emergency lighting, the utility functions such as field illuminating, LED light-emitting diode, when using the power supply of lithium electricity, must adopt the form of being connected in parallel to power between each LED light-emitting diode.Certainly also can adopt Alternating Current Power Supply, high-power LED, when adopting AC-powered, must be used the special-purpose driver module power supply of series model, and between each high-power LED, need to adopt the circuit form being connected in series.Realize the conversion of the supplied by AC/DC electricity of LED light-emitting diode, must solve the automatic conversion of LED light-emitting diode series connection and this two states in parallel.
When LED light-emitting diode quantity is two, circuit conversion is comparatively simple, by many-contact relay, can realize.But when three above series connection are used, every light-emitting diode has two pins, three LED light-emitting diodes are connected and turned connection in parallel, minimumly need to change at 6 o'clock to the conversion of 12 contacts, if there are 6 LED light-emitting diodes to connect, turn connection in parallel, to have so more point to need switching, relay, owing to being subject to number of contacts quantitative limitation, cannot meet design need.
Summary of the invention
The technical issues that need to address of the present invention are to provide a kind of simple in structure, connection in series-parallel automatic switching circuit of being applied to a plurality of LED light-emitting diodes.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows.
LED light-emitting diode connection in series-parallel automatic switching circuit, comprise power input terminal and a plurality of LED light-emitting diode, described power input comprises direct-flow positive pole input terminal, direct current negative input, exchanges driver module electrode input end and exchanges driver module negative input, described a plurality of LED light-emitting diode is connected in series in successively and exchanges driver module electrode input end and exchange between driver module negative input, is connected in series a diode between adjacent LED light-emitting diode; Between described direct-flow positive pole input terminal and the positive pole of each LED light-emitting diode, be all connected in series a diode, between the negative pole of each LED light-emitting diode and direct current negative input, be connected in series respectively a diode.
Improvement of the present invention is: described diode is the low conduction voltage drop diode of Schottky.
Owing to having adopted above technical scheme, the invention technological progress is as follows.
Circuit structure of the present invention is simple, can input the conversion that contact carries out a plurality of LED light-emitting diode connection in series-parallel types of attachment by change, easy to operate, applicable to the conversion of a plurality of LED circuit of LED, has met the requirement of different supply power modes to circuit.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of embodiment 1;
Wherein: D1 ~ D8 is Schottky diode, LED1 ~ LED3 is LED light-emitting diode.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further elaborated.
A kind of LED light-emitting diode connection in series-parallel automatic switching circuit, comprise power input terminal and a plurality of LED light-emitting diode, power input comprises direct-flow positive pole input terminal A, the sub-C of direct current negative input, exchanges the sub-B of driver module electrode input end and exchanges the sub-D of driver module negative input.Described a plurality of LED light-emitting diode is connected in series in successively and exchanges the sub-B of driver module electrode input end and exchange between the sub-D of driver module negative input, is connected in series a diode between adjacent LED light-emitting diode; Between described direct-flow positive pole input terminal A and the positive pole of each LED light-emitting diode, be all connected in series a diode, between the negative pole of each LED light-emitting diode and the sub-C of direct current negative input, be connected in series respectively a diode.
The present embodiment be take three LED light-emitting diodes and operation principle of the present invention is described as example, and the circuit diagram of the present embodiment as shown in Figure 1.
Three LED LED 1 ~ LED3 are connected in series in successively and exchange the sub-B of driver module electrode input end and exchange between the sub-D of driver module negative input, the positive pole of LED1 light-emitting diode connects the sub-B of interchange driver module electrode input end, and the negative pole of LED3 light-emitting diode connects the sub-D of interchange driver module negative input.
Between adjacent LED light-emitting diode, be connected in series a diode.Be to be connected in series diode D7 between LED1 light-emitting diode and LED2 light-emitting diode, the positive pole of diode D7 connects the negative pole of LED1 light-emitting diode, and the negative pole of diode D7 connects the positive pole of LED2 light-emitting diode; Between LED2 light-emitting diode and LED3 light-emitting diode, be connected in series diode D8, the positive pole of diode D8 connects the negative pole of LED2 light-emitting diode, and the negative pole of diode D8 connects the positive pole of LED3 light-emitting diode.
Between the positive pole of direct-flow positive pole input terminal A and each LED light-emitting diode, be all connected in series a diode.Be to be connected in series diode D1 between direct-flow positive pole input terminal A and the positive pole of LED1 light-emitting diode, the positive pole of diode D1 connects direct-flow positive pole input terminal A, and the negative pole of diode D1 connects the positive pole of LED1 light-emitting diode; Between the positive pole of direct-flow positive pole input terminal A and LED2 light-emitting diode, be connected in series diode D2, the positive pole of diode D2 connects direct-flow positive pole input terminal A, and the negative pole of diode D2 connects the positive pole of LED2 light-emitting diode; Between the positive pole of direct-flow positive pole input terminal A and LED3 light-emitting diode, be connected in series diode D3, the positive pole of diode D3 connects direct-flow positive pole input terminal A, and the negative pole of diode D3 connects the positive pole of LED3 light-emitting diode.
Between the negative pole of each LED light-emitting diode and the sub-C of direct current negative input, be connected in series respectively a diode.Be to be connected in series diode D4 between the negative pole of LED1 light-emitting diode and the sub-C of direct current negative input, the positive pole of diode D4 connects the negative pole of LED1 light-emitting diode, and the negative pole of diode D4 connects the sub-C of direct current negative input; Between the negative pole of LED2 light-emitting diode and the sub-C of direct current negative input, be connected in series diode D5, the positive pole of diode D5 connects the negative pole of LED2 light-emitting diode, and the negative pole of diode D5 connects the sub-C of direct current negative input; Between the negative pole of LED3 light-emitting diode and the sub-C of direct current negative input, be connected in series diode D6, the positive pole of diode D6 connects the negative pole of LED3 light-emitting diode, and the negative pole of diode D6 connects the sub-C of direct current negative input.
Diode in the present embodiment adopts the low conduction voltage drop diode of Schottky, to realize its operating voltage between 3.7 ~ 4.2V.
During the present embodiment work, as adopted lithium battery power supply, the cathode output end that is about to lithium battery is connected with direct-flow positive pole input terminal A, the sub-C of direct current negative input respectively with cathode output end, and now, three LED light-emitting diodes consist of parallel circuits automatically.
As adopt Alternating Current Power Supply, and the positive and negative electrode of the special-purpose driver module of Alternating Current Power Supply is connected with the interchange sub-B of driver module electrode input end and the sub-D of interchange driver module negative input respectively, now, three LED light-emitting diodes form series circuit automatically.
Therefore the present invention can realize the work type of attachment of LED light-emitting diode by conversion electric power access point, realizes series-parallel conversion.
Claims (2)
1.LED light-emitting diode connection in series-parallel automatic switching circuit, comprise power input terminal and a plurality of LED light-emitting diode, described power input comprises direct-flow positive pole input terminal (A), direct current negative input (C), exchange driver module electrode input end (B) and exchange driver module negative input (D), it is characterized in that: described a plurality of LED light-emitting diodes are connected in series in successively and exchange driver module electrode input end (B) and exchange between driver module negative input (D), between adjacent LED light-emitting diode, be connected in series a diode, between described direct-flow positive pole input terminal (A) and the positive pole of each LED light-emitting diode, be all connected in series a diode, between the negative pole of each LED light-emitting diode and direct current negative input (C), be connected in series respectively a diode.
2. LED light-emitting diode connection in series-parallel automatic switching circuit according to claim 1, is characterized in that: described diode is the low conduction voltage drop diode of Schottky.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378642.5A CN104105271A (en) | 2014-08-04 | 2014-08-04 | Automatic LED series-parallel connection switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410378642.5A CN104105271A (en) | 2014-08-04 | 2014-08-04 | Automatic LED series-parallel connection switching circuit |
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| CN104105271A true CN104105271A (en) | 2014-10-15 |
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| CN201410378642.5A Pending CN104105271A (en) | 2014-08-04 | 2014-08-04 | Automatic LED series-parallel connection switching circuit |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007072873A1 (en) * | 2005-12-22 | 2007-06-28 | Rohm Co., Ltd. | Light emitting device and illumination instrument |
| CN202035195U (en) * | 2011-04-21 | 2011-11-09 | 刘安平 | Direct-current constant current source and application circuit thereof |
| CN103889111A (en) * | 2014-02-28 | 2014-06-25 | 上海路千电子科技有限公司 | Linear constant-current driving circuit capable of running under two kinds of voltage and driving method thereof |
| CN204031545U (en) * | 2014-08-04 | 2014-12-17 | 无锡市市北高级中学 | LED light-emitting diode connection in series-parallel automatic switching circuit |
-
2014
- 2014-08-04 CN CN201410378642.5A patent/CN104105271A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007072873A1 (en) * | 2005-12-22 | 2007-06-28 | Rohm Co., Ltd. | Light emitting device and illumination instrument |
| CN202035195U (en) * | 2011-04-21 | 2011-11-09 | 刘安平 | Direct-current constant current source and application circuit thereof |
| CN103889111A (en) * | 2014-02-28 | 2014-06-25 | 上海路千电子科技有限公司 | Linear constant-current driving circuit capable of running under two kinds of voltage and driving method thereof |
| CN204031545U (en) * | 2014-08-04 | 2014-12-17 | 无锡市市北高级中学 | LED light-emitting diode connection in series-parallel automatic switching circuit |
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Application publication date: 20141015 |