CN201479033U - Miniature high-isolation AC to DC power supply device - Google Patents
Miniature high-isolation AC to DC power supply device Download PDFInfo
- Publication number
- CN201479033U CN201479033U CN2009202277225U CN200920227722U CN201479033U CN 201479033 U CN201479033 U CN 201479033U CN 2009202277225 U CN2009202277225 U CN 2009202277225U CN 200920227722 U CN200920227722 U CN 200920227722U CN 201479033 U CN201479033 U CN 201479033U
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- circuit
- isolation
- miniature high
- transforming
- supply unit
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Abstract
The utility model discloses a miniature high-isolation AC to DC power supply device, which is formed by an anti-lightning circuit, an AC to DC circuit, a switch circuit, a transformer circuit and a rectifier circuit in a sequentially connecting way, wherein a control chip is arranged in the switch circuit, the signal output end of the control chip is connected with the grid of a field-effect tube, the drain of the field-effect tube is connected with the primary winding of the transformer circuit, the secondary winding of the transformer circuit is connected with the rectifier circuit, one end of the feedback winding of the transformer circuit is connected with the rectifier circuit through a phototransistor, and the other end of the feedback winding of the transformer circuit is connected with the source level of the field-effect tube in the switch circuit. The utility model has the advantages that the volume is effectively reduced, the isolation voltage is increased and the defects of large volume and low isolation voltage in the prior art are overcome. Since the modularized design is adopted, the miniature high-isolation AC to DC power supply device can be conveniently integrated into all kinds of devices.
Description
Technical field
The utility model relates to the AC-DC power module, refers to a kind of miniature high-isolation AC-DC supply unit particularly.
Technical background
Before the utility model proposes, a variety of AC-DC switch power module products are arranged on the market, the common volume of this series products is bigger, and the isolation voltage in its isolation voltage transformation unit between the primary and secondary is lower, is generally 1-2KV.At present, electronic product is in development rapidly, and all substantially electric equipments are all developing toward miniaturization, and the switch power module of original large volume, low isolation can't satisfy the requirement in market.
Summary of the invention
The purpose of this utility model is exactly the miniature high-isolation AC-DC supply unit that a kind of high-isolation, small size will be provided.
For realizing this purpose, the miniature high-isolation AC-DC supply unit that the utility model is designed, it is by anti thunder strike circuit, exchange the conversion DC circuit, switching circuit, transforming circuit and rectification circuit connect to form successively, wherein, be provided with control chip in the described switching circuit, the signal output part of this control chip is connected in the grid of field effect transistor, the drain electrode of field effect transistor is connected in the elementary winding of transforming circuit, the secondary winding of transforming circuit is connected in rectification circuit, one end of the feedback winding of transforming circuit is connected in rectification circuit by phototriode, and the other end of the feedback winding of transforming circuit is connected in the source class of field effect transistor in the switching circuit.
Further, be connected with over-voltage over-current protection circuit between described interchange conversion DC circuit and the switching circuit.
Further, the magnet ring that described transforming circuit adopts the R7K material to make, and on magnet ring, be wound with the lead that two-layer above insulating barrier is made.
Advantage of the present utility model is: can effectively reduce volume, improve isolation voltage, overcome the defective that volume is big in the prior art, isolation voltage is low.Modularized design of the present utility model can be integrated in the various kinds of equipment easily.
Description of drawings
Fig. 1 is a theory diagram of the present utility model.
Fig. 2 is switching circuit and transforming circuit in the utility model and rectification circuit and the connection diagram of relevant circuit.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples:
A kind of miniature high-isolation AC-DC supply unit shown in the figure; it is connected to form successively by anti thunder strike circuit, interchange conversion DC circuit, over-voltage over-current protection circuit, switching circuit, transforming circuit and rectification circuit; wherein; be provided with control chip in the described switching circuit; the signal output part of this control chip is connected in the grid of field effect transistor, is used for controlling the conducting of field effect transistor drain electrode and source class.Drain electrode clamping protection circuit that is composed in series by P6KE20A type transient voltage diode D1 and FR107 type recovery diode D2 and the drain electrode that inserts field effect transistor in the switching circuit after the elementary winding of transforming circuit is in parallel, drain electrode clamping protection circuit is used for the peak voltage that the high frequency transformer leakage inductance forms is limited within the safe range.The secondary winding of transforming circuit is connected in rectification circuit, and an end of the feedback winding of transforming circuit is connected in rectification circuit by phototriode, and the other end of the feedback winding of transforming circuit is connected in the source class of field effect transistor in the switching circuit.Be connected to shunt capacitance C1 between the feedback winding of described transforming circuit and the rectification circuit.
In the technique scheme, the bead that adopts in the transforming circuit is made with high magnetic permeability R7K material, and on bead, be wound with the lead that two-layer above insulating barrier is made, played the effect that reduces volume and strengthen isolation effect, the isolation voltage between the primary and secondary of transforming circuit can reach 4.5KV.Circuit in the utility model all adopts the Surface Mounting Technology design simultaneously, has further reduced volume of the present utility model.
The content that is not described in detail in this specification belongs to this area professional and technical personnel's known prior art.
Claims (5)
1. miniature high-isolation AC-DC supply unit, it is by anti thunder strike circuit, exchange the conversion DC circuit, switching circuit, transforming circuit and rectification circuit connect to form successively, it is characterized in that: be provided with control chip in the described switching circuit, the signal output part of this control chip is connected in the grid of field effect transistor, the drain electrode of field effect transistor is connected in the elementary winding of transforming circuit, transforming circuit secondary winding be connected in rectification circuit, one end of the feedback winding of transforming circuit is connected in rectification circuit by phototriode, and the other end of the feedback winding of transforming circuit is connected in the source class of field effect transistor in the switching circuit.
2. a kind of miniature high-isolation AC-DC supply unit according to claim 1 is characterized in that: be connected to shunt capacitance C1 between the feedback winding of described transforming circuit and the rectification circuit.
3. a kind of miniature high-isolation AC-DC supply unit according to claim 1 is characterized in that: drain electrode clamping protection circuit that is composed in series by transient voltage diode D1 and recovery diode D2 and the drain electrode that inserts field effect transistor in the switching circuit after the elementary winding of transforming circuit is in parallel.
4. a kind of miniature high-isolation AC-DC supply unit according to claim 1 is characterized in that: be connected with over-voltage over-current protection circuit between described interchange conversion DC circuit and the switching circuit.
5. a kind of miniature high-isolation AC-DC supply unit according to claim 1 is characterized in that: the magnet ring that described transforming circuit adopts the R7K material to make, and on magnet ring, be wound with the lead that two-layer above insulating barrier is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202277225U CN201479033U (en) | 2009-08-31 | 2009-08-31 | Miniature high-isolation AC to DC power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202277225U CN201479033U (en) | 2009-08-31 | 2009-08-31 | Miniature high-isolation AC to DC power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201479033U true CN201479033U (en) | 2010-05-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202277225U Expired - Fee Related CN201479033U (en) | 2009-08-31 | 2009-08-31 | Miniature high-isolation AC to DC power supply device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201479033U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086883A1 (en) * | 2014-12-04 | 2016-06-09 | 深圳市高瓴科技有限公司 | Mobile phone charging cord with invisible charger |
-
2009
- 2009-08-31 CN CN2009202277225U patent/CN201479033U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016086883A1 (en) * | 2014-12-04 | 2016-06-09 | 深圳市高瓴科技有限公司 | Mobile phone charging cord with invisible charger |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: WUHAN SHENGCHIP TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WUHAN SHENGFAN ELECTRONICS STOCK CO., LTD. Effective date: 20121105 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 430200 WUHAN, HUBEI PROVINCE TO: 430070 WUHAN, HUBEI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20121105 Address after: 430070 Hubei city of Wuhan province East Lake Development Zone old Wu Huang Highway No. 206 No. 1510 WITHUB time Patentee after: Wuhan Shengxinda Electronic Technology Co., Ltd. Address before: 430200, Hubei Province, Jiangxia District Temple Development Zone Sunshine Avenue, No. 9 Patentee before: Wuhan Shengfan Electronics Stock Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20140831 |
|
| EXPY | Termination of patent right or utility model |