CN2617118Y - High frequency auto connected booster circuit for DC ballast - Google Patents
High frequency auto connected booster circuit for DC ballast Download PDFInfo
- Publication number
- CN2617118Y CN2617118Y CN 03244159 CN03244159U CN2617118Y CN 2617118 Y CN2617118 Y CN 2617118Y CN 03244159 CN03244159 CN 03244159 CN 03244159 U CN03244159 U CN 03244159U CN 2617118 Y CN2617118 Y CN 2617118Y
- Authority
- CN
- China
- Prior art keywords
- high frequency
- switch element
- autotransformer
- capacitor
- bridge
- 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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- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
The utility model discloses a high frequency self coupling boost circuit, which comprises an autotransformer, a high frequency switch element Q1, a high frequency switch element Q2, a capacitance C1and a capacitance C2, wherein the high frequency switch element Q1 and the high frequency switch element Q2 are connected into an active half bridge, the capacitance C1 and the capacitance C2 are connected into an passive half bridge, the autotransformer is connected with the midpoint of the active half bridge, and the end of the primary coil of the autotransformer is connected with the midpoint of the passive half bridge; Q1 and Q2 are alternative interlocking, which enables the autotransformer to generate high frequency current which is transformed to 130VAC to 160VAC high frequency pressure after passing through the autotransformer. The utility model has the advantages that in the DC electronic rectifier; the 12V power supply can output the stable power as high as 25W; the 24V power supply can output the stable power as high as 50W, the high frequency self coupling boost circuit improves the energy transfer efficiency, and does not generate peak voltage which is harmful to the transistor, lowers the requirements to the elements, has a good thermal stability and improves the reliability of the products.
Description
Technical field:
The utility model relates to a kind of high frequency self coupling booster circuit, especially relates to a kind of dc ballast high frequency self coupling booster circuit.
Background technology:
Existing dc electronic ballast has mainly been adopted " push-pull oscillator formula " and " single tube oscillatory type " two kinds of oscillation boosting modes and has been realized.Its circuit is comparatively simple, cost is lower, but has more weak point technically, for example, is difficult in below the 24V DC power supply voltage and makes greater than the electric ballast more than the 15W; Energy transmission efficiency is low; Easily produce the peak voltage harmful to transistor; To the requirement on devices height; Poor stability; Product is fragile.
The utility model content:
The purpose of this utility model is to provide a kind of can improve energy transmission efficiency in the dc electronic ballast, the dc ballast of power stability high frequency self coupling booster circuit.
The purpose of this utility model is implemented by following technical scheme: it includes autotransformer, HF switch element Q
1, HF switch element Q
2, capacitor C
1And capacitor C
2, described HF switch element Q
1With described HF switch element Q
2Connect into initiatively half-bridge, by described capacitor C
1With described capacitor C
2Connect into passive half-bridge, described autotransformer primary coil anode connects the mid point of described active half-bridge, and described autotransformer primary coil negative terminal connects the mid point of described passive half-bridge; As described HF switch element Q
1Conducting, electric current is from V
CThrough described HF switch element Q
1Through described autotransformer primary coil anode, through described capacitor C
2, go back to ground again; As described HF switch element Q
2Conducting, electric current is from V
CThrough described capacitor C
1Through anti-end of described autotransformer primary coil, again through described HF switch element Q
2, go back to ground again; Described HF switch element Q
1With described HF switch element Q
2Alternate conduction makes described autotransformer produce high-frequency current, rises to 130V through described autotransformer
AC～160V
ACHigh frequency voltage, this high frequency voltage can be for the work of back fluorescent lamp resonant circuit.
The utility model has the advantages that: in the dc electronic ballast, can make the firm power of 12V power supply output up to 25W; 24W power supply output is up to the firm power of 50W, and this high frequency self coupling booster circuit can improve energy transmission efficiency, does not produce the peak voltage harmful to transistor, has reduced the requirement to device, and Heat stability is good can improve the global reliability of product.
Fig. 1 is a circuit diagram of the present utility model.
Execution mode:
Embodiment 1: the dc ballast includes autotransformer, HF switch element Q with high frequency self coupling booster circuit
1, HF switch element Q
2, capacitor C
1And capacitor C
2, HF switch element Q
1With HF switch element Q
2Connect into initiatively half-bridge, by capacitor C
1And capacitor C
2Connect into passive half-bridge, autotransformer primary coil anode connects the initiatively mid point of half-bridge, and autotransformer primary coil negative terminal connects the mid point of passive half-bridge; As HF switch element Q
1Conducting, electric current is from V
CThrough HF switch element Q
1Through autotransformer primary coil anode, through capacitor C
2, go back to ground again; As HF switch element Q
2Conducting, electric current is from V
CThrough capacitor C
1Hold through the autotransformer primary coil is counter, again through HF switch element Q
2, go back to ground again; HF switch element Q
1With HF switch element Q
2Alternate conduction makes autotransformer produce high-frequency current, rises to 130V through autotransformer
AC～160V
ACHigh frequency voltage, this high frequency voltage can be for the work of back fluorescent lamp resonant circuit.
Claims (1)
1, a kind of dc ballast is characterized in that with high frequency self coupling booster circuit it includes autotransformer, HF switch element Q
1, HF switch element Q
2, capacitor C
1And capacitor C
2, described HF switch element Q
1With described HF switch element Q
2Connect into initiatively half-bridge, by described capacitor C
1With described capacitor C
2Connect into passive half-bridge, described autotransformer primary coil anode connects the mid point of described active half-bridge, and described autotransformer primary coil negative terminal connects the mid point of described passive half-bridge; Described HF switch element Q
1With described HF switch element Q
2Alternate conduction makes described autotransformer produce high-frequency current, rises to 130V through described autotransformer
AC～160V
ACHigh frequency voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03244159 CN2617118Y (en) | 2003-04-01 | 2003-04-01 | High frequency auto connected booster circuit for DC ballast |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03244159 CN2617118Y (en) | 2003-04-01 | 2003-04-01 | High frequency auto connected booster circuit for DC ballast |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2617118Y true CN2617118Y (en) | 2004-05-19 |
Family
ID=34251105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03244159 Expired - Fee Related CN2617118Y (en) | 2003-04-01 | 2003-04-01 | High frequency auto connected booster circuit for DC ballast |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2617118Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158096A (en) * | 2011-05-11 | 2011-08-17 | 南京博兰得电子科技有限公司 | Non-isolated resonant converter |
-
2003
- 2003-04-01 CN CN 03244159 patent/CN2617118Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102158096A (en) * | 2011-05-11 | 2011-08-17 | 南京博兰得电子科技有限公司 | Non-isolated resonant converter |
| CN102158096B (en) * | 2011-05-11 | 2013-11-20 | 南京博兰得电子科技有限公司 | Non-isolated resonant converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |