CN204119060U - Online integrated one chip linear stabilized power supply - Google Patents
Online integrated one chip linear stabilized power supply Download PDFInfo
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- CN204119060U CN204119060U CN201420603830.9U CN201420603830U CN204119060U CN 204119060 U CN204119060 U CN 204119060U CN 201420603830 U CN201420603830 U CN 201420603830U CN 204119060 U CN204119060 U CN 204119060U
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Abstract
The utility model discloses a kind of online integrated one chip linear stabilized power supply, comprise Industrial Frequency Transformer, rectification and filter circuit, integrated linear voltage stabilizing circuit and output filter circuit.AC220 volt exchanges exports to integral bridge type rectifier D1, through the direct voltage V of electric capacity C1 filtering stable output after D1 rectification after online Industrial Frequency Transformer T1 transformation
iN, direct voltage V
iNcarry out pressure regulation and voltage stabilizing through integrated linear voltage stabilizing circuit, then form through output filter circuit filtering the direct current that the precision of voltage regulation is high, ripple voltage is low; Output filter circuit is made up of voltage stabilizing didoe D4 and filter capacitor C3, C4 parallel connection.It is adaptable that the utility model has electrical network, exports the features such as the precision of voltage regulation is high, output ripple voltage is low, circuit structure is simple, reliability is high, adaptive capacity to environment is strong.
Description
Technical field
The utility model relates to a kind of stabilized voltage power supply, specifically, relates to a kind of online integrated one chip linear stabilized power supply.
Background technology
The components and parts that traditional discrete linear stabilized power supply uses are many, and circuit structure is complicated, and cost is higher.And integrated linear stabilized power supply utilizes Correctional tube Linear Amplifer principle, regulated output voltage is realized by the line drop adjusting transistor, the feature of its higher precision of voltage regulation and low ripple is that switch mode power is incomparable, more and more be widely used in precision instrumentation etc. and supply electrical domain, but now widely used integrated form linear stabilized power supply, there is integrated level and stability is not high enough, voltage accuracy and ripple characteristics can't meet the requirement of some special occasions.
Utility model content
The online integrated one chip linear stabilized power supply that the utility model designs to solve the problems of the technologies described above just.
The utility model solves the technical scheme that its technical problem adopts:
A kind of online integrated one chip linear stabilized power supply, comprises Industrial Frequency Transformer, rectification and filter circuit, integrated linear voltage stabilizing circuit and output filter circuit.AC220 volt exchanges exports to integral bridge type rectifier D1, through the direct voltage V of electric capacity C1 filtering stable output after D1 rectification after online Industrial Frequency Transformer T1 transformation
iN, direct voltage V
iNcarry out pressure regulation and voltage stabilizing through integrated linear voltage stabilizing circuit, then form through output filter circuit filtering the direct current that the precision of voltage regulation is high, ripple voltage is low; Output filter circuit is made up of voltage stabilizing didoe D4 and filter capacitor C3, C4 parallel connection.
Described online integrated one chip linear stabilized power supply, its integrated linear voltage stabilizing circuit is formed by with linear Integrated LDO chip U1 and peripheral circuit thereof, direct voltage V
iNbe connected with the input pin of U1, diode D3 positive pole connects the output pin of U1, diode D3 negative pole connects the input pin of U1, the output pin of U1 passes through resistance R1 and the R2 ground connection of series connection, the output pin of U1 connects the negative pole of diode D2 simultaneously, the positive pole of diode D2 is connected with electric capacity C2 positive pole, electric capacity C2 minus earth; The tie point of ADJ pin contact resistance R1 and R2 of U1, the ADJ pin of U1 is connected with the positive pole of diode D2 simultaneously.
The course of work of the present utility model is: alternating current 220V input first carries out isolated buck through Industrial Frequency Transformer, to meet the low voltage difference requirement of rear class LDO chip, is converted to pulsating direct current through current rectifying and wave filtering circuit, then exports through LDO chip burning voltage.Wherein, linear voltage stabilization chip LDO adopts resistor divider to realize feedback circuit and carry out output voltage adjustment, input voltage is changed or load change time output voltage simultaneous adaptation adjustment, achieve the relative stability of output voltage.
The utility model adopts entity embedding all-metal closed structure to improve adaptive capacity to environment, has the following advantages compared with traditional linear power supply:
1, online mode of operation, directly accesses utility grid work.
2, export the precision of voltage regulation high, ripple voltage is low.
3, all-metal sealing, entity embedding, resistance to harsh environment for use.
4, power supply grid is compatible strong.
The beneficial effects of the utility model be have export the precision of voltage regulation high, the features such as output ripple voltage is low, and circuit structure is simple, reliability is high, electrical network is adaptable.
Accompanying drawing explanation
Fig. 1 is the utility model schematic block circuit diagram.
Fig. 2 is the utility model input power frequency step-down and current rectifying and wave filtering circuit schematic diagram.
Fig. 3 is the utility model integrated linear voltage stabilizing circuit schematic diagram.
Fig. 4 is the utility model output filter circuit schematic diagram.
Fig. 5 is the utility model linear voltage-stabilizing circuit LDO IC interior schematic diagram.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
As Figure 1-4, a kind of online integrated one chip linear stabilized power supply of the utility model, comprises Industrial Frequency Transformer, rectification and filter circuit, integrated linear voltage stabilizing circuit and output filter circuit.AC220 volt exchanges exports to integral bridge type rectifier D1, through the direct voltage V of electric capacity C1 filtering stable output after D1 rectification after online Industrial Frequency Transformer T1 transformation
iN, direct voltage V
iNcarry out pressure regulation and voltage stabilizing through integrated linear voltage stabilizing circuit, then form through output filter circuit filtering the direct current that the precision of voltage regulation is high, ripple voltage is low; Output filter circuit is made up of voltage stabilizing didoe D4 and filter capacitor C3, C4 parallel connection.
Described online integrated one chip linear stabilized power supply, its integrated linear voltage stabilizing circuit is formed by with linear Integrated LDO chip U1 and peripheral circuit thereof, direct voltage V
iNbe connected with the input pin of U1, diode D3 positive pole connects the output pin of U1, diode D3 negative pole connects the input pin of U1, the output pin of U1 passes through resistance R1 and the R2 ground connection of series connection, the output pin of U1 connects the negative pole of diode D2 simultaneously, the positive pole of diode D2 is connected with electric capacity C2 positive pole, electric capacity C2 minus earth; The tie point of ADJ pin contact resistance R1 and R2 of U1, the ADJ pin of U1 is connected with the positive pole of diode D2 simultaneously.The operation principle of linear Integrated LDO chip U1 is shown in Fig. 5.
The utility model is not limited to above-mentioned preferred forms, anyone other any or akin products identical with the utility model drawn under enlightenment of the present utility model, all drops within protection range of the present utility model.
Claims (2)
1. an online integrated one chip linear stabilized power supply, comprises Industrial Frequency Transformer, rectification and filter circuit, integrated linear voltage stabilizing circuit and output filter circuit; It is characterized in that: AC220 volt exchanges exports to integral bridge type rectifier D1, through the direct voltage V of electric capacity C1 filtering stable output after D1 rectification after online Industrial Frequency Transformer T1 transformation
iN, direct voltage V
iNcarry out pressure regulation and voltage stabilizing through integrated linear voltage stabilizing circuit, then form through output filter circuit filtering the direct current that the precision of voltage regulation is high, ripple voltage is low; Output filter circuit is made up of voltage stabilizing didoe D4 and filter capacitor C3, C4 parallel connection.
2. online integrated one chip linear stabilized power supply according to claim 1, is characterized in that: integrated linear voltage stabilizing circuit is formed by with linear Integrated LDO chip U1 and peripheral circuit thereof, direct voltage V
iNbe connected with the input pin of U1, diode D3 positive pole connects the output pin of U1, diode D3 negative pole connects the input pin of U1, the output pin of U1 passes through resistance R1 and the R2 ground connection of series connection, the output pin of U1 connects the negative pole of diode D2 simultaneously, the positive pole of diode D2 is connected with electric capacity C2 positive pole, electric capacity C2 minus earth; The tie point of ADJ pin contact resistance R1 and R2 of U1, the ADJ pin of U1 is connected with the positive pole of diode D2 simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420603830.9U CN204119060U (en) | 2014-10-20 | 2014-10-20 | Online integrated one chip linear stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420603830.9U CN204119060U (en) | 2014-10-20 | 2014-10-20 | Online integrated one chip linear stabilized power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204119060U true CN204119060U (en) | 2015-01-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420603830.9U Active CN204119060U (en) | 2014-10-20 | 2014-10-20 | Online integrated one chip linear stabilized power supply |
Country Status (1)
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| CN (1) | CN204119060U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894805A (en) * | 2017-05-09 | 2018-04-10 | 何金昌 | A kind of power module for including reference voltage circuit |
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2014
- 2014-10-20 CN CN201420603830.9U patent/CN204119060U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107894805A (en) * | 2017-05-09 | 2018-04-10 | 何金昌 | A kind of power module for including reference voltage circuit |
| CN108376012A (en) * | 2017-05-09 | 2018-08-07 | 常州爱上学教育科技有限公司 | Power module and its working method with compensation circuit, filter circuit |
| CN108427469A (en) * | 2017-05-09 | 2018-08-21 | 常州爱上学教育科技有限公司 | The reference voltage circuit with compensation circuit of power module |
| CN108427470A (en) * | 2017-05-09 | 2018-08-21 | 常州爱上学教育科技有限公司 | The reference voltage circuit and its working method with compensation circuit of power module |
| CN108491022A (en) * | 2017-05-09 | 2018-09-04 | 常州爱上学教育科技有限公司 | Power module and working method based on compensation circuit, filter circuit |
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