CN201234373Y - Series connection flyback converter applied on LED fluorescent lamp - Google Patents
Series connection flyback converter applied on LED fluorescent lamp Download PDFInfo
- Publication number
- CN201234373Y CN201234373Y CNU2008201264401U CN200820126440U CN201234373Y CN 201234373 Y CN201234373 Y CN 201234373Y CN U2008201264401 U CNU2008201264401 U CN U2008201264401U CN 200820126440 U CN200820126440 U CN 200820126440U CN 201234373 Y CN201234373 Y CN 201234373Y
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- series
- flyback converter
- fluorescent lamp
- series connection
- led fluorescent
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Abstract
The utility model discloses a series-connection flyback converter used in an LED fluorescent lamp, which comprises more than two transformers. The primary windings of the transformers are connected in series and connected with a quasi-resonance zero-crossing trigger-based driving chip. The secondary windings of the transformers are connected in series and connected with a rectifying tube. The secondary windings of the transformers are also connected with a constant-current circuit. The series-connection flyback converter is used in the switching power supply of the LED fluorescent lamp. In the series-connection flyback converter, the plurality of transformers are connected in series and are smaller in size relative to a transformer with the same power. Additionally, the secondary windings of the transformers are connected in series and finally connected with the rectifying tube, so that the cost of the whole converter is reduced.
Description
Technical field
The utility model relates in the Switching Power Supply fluorescent lamp, is meant a kind of series connection flyback converter of the LED of being applied in fluorescent lamp especially.
Background technology
In the present employed Switching Power Supply, in the LED fluorescent lamp, when the needs high-power transformer, because when the high-power transformer volume can't be installed in the power supply more greatly, usually adopt the form of a plurality of transformer series connection to be installed in the Switching Power Supply, during series connection, the transformer polyphone, secondary coil is by output in parallel behind the rectifying tube.
Adopt this series system, each Secondary winding of transformer all will be with rectifying tube, and unbalanced phenomenon may appear in the power output of each transformer; In addition, each transformer uses a rectifying tube, and cost is higher relatively.
The utility model content
In view of this, the utility model is to provide a kind of series connection flyback converter of the LED of being applied in fluorescent lamp, to solve the unbalanced problem of transformer power output in the above-mentioned Switching Power Supply.
For addressing the above problem, the utility model provides a kind of series connection flyback converter of the LED of being applied in fluorescent lamp, comprising:
At least two above transformers, the elementary windings in series of described transformer connects, and connection has the chip for driving of quasi-resonance passing zero trigger; Described Secondary winding of transformer is connected in series, and connects rectifying tube.
Preferably, described chip for driving employing model is the chip of SA7527.
Preferably, described Secondary winding of transformer also connects constant-current circuit.
Preferably, described series connection flyback converter is applied in the Switching Power Supply.
This series connection flyback converter is owing to adopt a plurality of transformer series connection, and therefore for a transformer of equal-wattage, volume is less, and each Secondary winding of transformer series connection, connects a rectifying tube at last, therefore, reduces the cost of whole transducer.
Description of drawings
Fig. 1 is the circuit structure diagram of series connection flyback converter.
Embodiment
For clearly demonstrating the technical scheme in the utility model, provide preferred embodiment below and be described with reference to the accompanying drawings.
Referring to Fig. 1, Fig. 1 is the circuit structure diagram of transducer, comprises plural at least transformer, adopts three groups of transformer T1, T2, T3 among this embodiment, and the elementary winding of three groups of transformers is connected also order series connection of secondary winding in proper order; Elementary winding is connected the pin 5 of the chip for driving SA7527 with quasi-resonance passing zero trigger, and secondary winding connects and rectifying tube D1, connects constant-current circuit and fluorescent tube in the Secondary winding of transformer side.
This series connection flyback converter is owing to adopt a plurality of transformer series connection, and therefore for a transformer of equal-wattage, volume is less, and each Secondary winding of transformer series connection, connects a rectifying tube at last, therefore, reduces the cost of whole transducer; The voltage and current size of primary and secondary coil has fixing relation: the number of turn of voltage and coil is directly proportional, and the number of turn of electric current and coil square is inversely proportional to.Like this, by transformer, just realized the conversion of voltage and current.
Transducer in the utility model can be applied in the Switching Power Supply of various LED fluorescent lamps, realizes the On/Off of fluorescent tube.For the device of being set forth among each embodiment of the utility model, all within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (4)
1, a kind of series connection flyback converter that is applied in the LED fluorescent lamp is characterized in that, comprising: at least two above transformers, and the elementary windings in series of described transformer connects, and connection has the chip for driving of quasi-resonance passing zero trigger; Described Secondary winding of transformer is connected in series, and connects rectifying tube.
2, a kind of series connection flyback converter that is applied in the LED fluorescent lamp according to claim 1 is characterized in that, it is the chip of SA7527 that described chip for driving adopts model.
3, a kind of series connection flyback converter that is applied in the LED fluorescent lamp according to claim 1 is characterized in that described Secondary winding of transformer also connects constant-current circuit.
4, a kind of series connection flyback converter that is applied in the LED fluorescent lamp according to claim 3 is characterized in that described series connection flyback converter is applied in the Switching Power Supply of LED fluorescent lamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201264401U CN201234373Y (en) | 2008-06-27 | 2008-06-27 | Series connection flyback converter applied on LED fluorescent lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201264401U CN201234373Y (en) | 2008-06-27 | 2008-06-27 | Series connection flyback converter applied on LED fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201234373Y true CN201234373Y (en) | 2009-05-06 |
Family
ID=40620760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201264401U Expired - Lifetime CN201234373Y (en) | 2008-06-27 | 2008-06-27 | Series connection flyback converter applied on LED fluorescent lamp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201234373Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860237A (en) * | 2010-06-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | High-power factor constant-current circuit and power source |
| US9239157B2 (en) | 2010-08-26 | 2016-01-19 | Rasit Özgüc | Light-emitting means, in particular for operation in lampholders for fluorescent lamps |
-
2008
- 2008-06-27 CN CNU2008201264401U patent/CN201234373Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101860237A (en) * | 2010-06-01 | 2010-10-13 | 海洋王照明科技股份有限公司 | High-power factor constant-current circuit and power source |
| CN101860237B (en) * | 2010-06-01 | 2014-01-29 | 海洋王照明科技股份有限公司 | High-power factor constant-current circuit and power source |
| US9239157B2 (en) | 2010-08-26 | 2016-01-19 | Rasit Özgüc | Light-emitting means, in particular for operation in lampholders for fluorescent lamps |
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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: 20090506 |
|
| CX01 | Expiry of patent term |