CN107612354A - A kind of self-maintained circuit - Google Patents
A kind of self-maintained circuit Download PDFInfo
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- CN107612354A CN107612354A CN201710751770.3A CN201710751770A CN107612354A CN 107612354 A CN107612354 A CN 107612354A CN 201710751770 A CN201710751770 A CN 201710751770A CN 107612354 A CN107612354 A CN 107612354A
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Abstract
The present invention relates to a kind of self-maintained circuit, including：First polar capacitor, the second polar capacitor, the first electric capacity, the second electric capacity, the 3rd electric capacity, the 4th electric capacity, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, voltage-regulator diode, voltage-stablizer, the first transistor, second transistor, metal-oxide-semiconductor, two-winding transformer；The circuit can realize multigroup stable power-supplying, and output power is not limited.With the advantages of temperature rise is low, efficiency high, power supply can more steady operation；Reduce cost, it is possible to increase power supply cost performance.Meanwhile the self-maintained circuit is operated in discontinuous mode, the loss of switching tube and transformer is low.What is used is all that the circuit of conventional resistance capacitance and transistor collocation eliminates integrated IC cost.
Description
Technical field
The present invention relates to a kind of self-maintained circuit, and in particular to it is a kind of can realize it is multigroup while auxiliary power supply from exciting
Swing circuit.
Background technology
The auxiliary power supply that existing power source products use uses a decompression power supply IC to realize.Operation principle：Root
The stable magnitude of voltage in setting of decompression according to circuit power supply IC input voltage by BUCK circuits.Current auxiliary power supply IC is big
Majority all applies to BUCK circuits, that is, can only export a stable voltage, it is impossible to multigroup power supply.Meanwhile use collection
It can rise on into IC costs.
The content of the invention
In view of this, it is necessary to for the problem of, there is provided a kind of self-maintained circuit.
A kind of self-maintained circuit, including：First polar capacitor, the second polar capacitor, the first electric capacity, the second electric capacity,
Three electric capacity, the 4th electric capacity, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th electricity
Resistance, the 8th resistance, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, the six or two pole
Pipe, voltage-regulator diode, voltage-stablizer, the first transistor, second transistor, metal-oxide-semiconductor, two-winding transformer；
One end connection voltage input end, the tap of primary side the 3rd of two-winding transformer, the 8th resistance of the first resistor
One end and the first electric capacity one end, other end connection one end of second resistance of the first resistor, the 4th diode it is negative
The negative electrode of pole, one end of the 4th electric capacity and voltage-stablizer, the anode of the voltage-stablizer connect one end of the 7th resistance, the 4th electric capacity
The other end, the positive pole of voltage-regulator diode, the tap of two-winding transformer primary side second, the colelctor electrode of the first transistor, the second crystal
One end of the emitter stage of pipe, one end of the second electric capacity and the 4th resistance, and being grounded, the voltage input end connection of the voltage-stablizer the
One end of the other end of seven resistance and the 6th resistance, the other end the first output end of connection of the 6th resistance, the described 4th 2
The positive pole connection other end of second resistance of pole pipe, one end of the 3rd electric capacity, the positive pole of the 5th diode, voltage-regulator diode it is negative
Pole and the base stage of the first transistor, the negative pole of the 5th diode connect the positive pole of the 6th diode, the 6th diode
The negative pole connection colelctor electrode of the first transistor, the grid of metal-oxide-semiconductor, the other end of the second electric capacity and the current collection of second transistor
Pole, one end of the base stage connection 3rd resistor of the second transistor, the other end of the 3rd resistor connect the 4th resistance
The source electrode of the other end and metal-oxide-semiconductor, the other end of the 3rd electric capacity connect one end of the 5th resistance, the 5th resistance it is another
The tap of primary side first of end connection two-winding transformer, the other end of the 8th resistance connect the other end and the of the first electric capacity
The negative pole of three diodes, the drain electrode of positive pole connection metal-oxide-semiconductor of the 3rd diode and the primary side the 4th of two-winding transformer are taken out
Head, the tap of secondary the 4th of the first diode cathode connection two-winding transformer, the negative pole connection of second diode
The positive pole of second polar capacitor, and the first output end is used as, the negative pole connection two-winding transformer of second polar capacitor
The negative pole of the tap of secondary the 3rd, the tap of secondary first of two-winding transformer and the first polar capacitor, and be grounded, the described 1st
The tap of secondary second of the positive pole connection two-winding transformer of pole pipe, the negative pole of first diode connect the first polar capacitor
Positive pole and be used as the second output end.
The tap of primary side first and the tap of primary side the 3rd of the two-winding transformer are Same Name of Ends, the two-winding transformer
The tap of primary side second and the tap of primary side the 4th be Same Name of Ends, the tap of secondary first of the two-winding transformer and secondary the 3rd
Tap is Same Name of Ends, and the tap of secondary second and the tap of secondary the 4th of the two-winding transformer are Same Name of Ends.
Beneficial effects of the present invention：
The present invention proposes a kind of self-maintained circuit, and the circuit can realize multigroup stable power-supplying, output power not by
Limitation.With the advantages of temperature rise is low, efficiency high, power supply can more steady operation；Reduce cost, it is possible to increase power supply sexual valence
Than.Meanwhile the self-maintained circuit is operated in discontinuous mode, the loss of switching tube and transformer is low.What is used is all conventional
Resistance capacitance and the circuit of transistor collocation eliminate integrated IC cost.
Brief description of the drawings
Fig. 1 is the circuit diagram of self-maintained circuit in the specific embodiment of the invention.
Embodiment
The present invention proposes a kind of self-maintained circuit, as shown in figure 1, including：First polar capacitor CE1, the second polarity electricity
Hold CE2, the first electric capacity CE3, the second electric capacity CE4, the 3rd electric capacity CE5, the 4th electric capacity CE6, first resistor RE1, second resistance
RE2,3rd resistor RE3, the 4th resistance RE4, the 5th resistance RE5, the 6th resistance RE6, the 7th resistance RE7, the 8th resistance RE8,
First diode DE1, the second diode DE2, the 3rd diode DE3, the 4th diode DE4, the 5th diode DE5, the six or two
Pole pipe DE6, voltage-regulator diode DE7, voltage-stablizer U1, the first transistor QE1, second transistor QE2, metal-oxide-semiconductor VE, double winding transformation
Device TE；
One end connection voltage input end INPUT+ of the first resistor RE1, two-winding transformer TE primary side the 3rd are taken out
First 3, the 8th resistance RE8 one end and the first electric capacity CE3 one end, the other end connection second resistance of the first resistor RE1
RE2 one end, the 4th diode DE4 negative pole, the 4th electric capacity CE6 one end and voltage-stablizer U1 negative electrode, the voltage-stablizer U1
Anode connect the 7th resistance RE7 one end, the 4th electric capacity CE6 other end, voltage-regulator diode DE7 positive pole, double winding become
The second tap of depressor TE primary sides 2, the first transistor QE1 colelctor electrode, second transistor QE2 emitter stage, the second electric capacity CE4
One end and the 4th resistance RE4 one end, and be grounded, the voltage input end of the voltage-stablizer U1 connects the another of the 7th resistance RE7
End and the 6th resistance RE6 one end, the other end of the 6th resistance RE6 connect the first output end OUT1, the four or two pole
The pipe DE4 positive pole connection second resistance RE2 other end, the 3rd electric capacity CE5 one end, the 5th diode DE5 positive pole, voltage stabilizing
Diode DE7 negative pole and the first transistor QE1 base stage, the negative pole of the 5th diode DE5 connect the 6th diode DE6
Positive pole, negative pole connection the first transistor QE1 colelctor electrode, metal-oxide-semiconductor VE grid, the second electricity of the 6th diode DE6
Hold the CE4 other end and second transistor QE2 colelctor electrode, the base stage connection 3rd resistor RE3's of the second transistor QE2
One end, the other end of the 3rd resistor RE3 connect the 4th resistance RE4 other end and metal-oxide-semiconductor VE source electrode, the 3rd electricity
The other end for holding CE5 connects the 5th resistance RE5 one end, the other end connection two-winding transformer TE of the 5th resistance RE5
The first tap of primary side 1, the other end of the 8th resistance RE8 connects the first electric capacity CE3 other end and the 3rd diode DE3
Negative pole, the positive pole connection metal-oxide-semiconductor VE drain electrode and the two-winding transformer TE tap of primary side the 4th of the 3rd diode DE3
4, the tap 5 of secondary the 4th of the second diode DE2 positive poles connection two-winding transformer TE, the second diode DE2's
Negative pole connects the second polar capacitor CE2 positive pole, and is used as the first output end OUT1, the negative pole of the second polar capacitor CE2
Connect the two-winding transformer TE tap 6 of secondary the 3rd, two-winding transformer TE secondary the first tap 8 and the first polar capacitor
CE1 negative pole, and be grounded, the positive pole connection two-winding transformer TE of the first diode DE1 the second tap of secondary 7, institute
The negative pole for stating the first diode DE1 connects the first polar capacitor CE1 positive pole and is used as the second output end OUT2.
In present embodiment, connected in voltage input end INPUT+, by first resistor RE1, second resistance RE2 to MOS
Pipe VE starts voltage, and metal-oxide-semiconductor VE conducting inductance storage energy, two-winding transformer TE the first tap of primary side 1, primary side second are taken out
First 2, the tap 3 of primary side the 3rd, the tap 4 of primary side the 4th turn on, and the two-winding transformer TE tap 5 of secondary the 4th, secondary the 3rd are taken out
First 6, the second tap of secondary 7, the first tap of secondary 8 end, and now the 3rd electric capacity CE5 conductings are given to the first transistor QE1 and MOS
Pipe VE provides a control electric current metal-oxide-semiconductor VE constant conduction.
When inductive energy storage to saturation, the 3rd electric capacity CE5 electric current, which reduces, causes the first transistor QE1 to turn on so that metal-oxide-semiconductor
VE ends, two-winding transformer the TE tap 5 of secondary the 4th, the tap 6 of secondary the 3rd, the second tap of secondary 7, the tap of secondary first
8 windings release energy.When the two-winding transformer TE tap 5 of secondary the 4th, the tap 6 of secondary the 3rd, the second tap of secondary 7, pair
The release of the secondary windings energy of the first tap of side 8 repeats above-mentioned working method when completing.
In present embodiment, voltage-stablizer U1 is CJ431, simply can just be participated in when OUT1 output voltages exceed setting voltage
Work might not each the work period have participation, when OUT1, which exceedes, sets voltage CJ431 turn on metal-oxide-semiconductor VE G it is extremely electric
Pressure is pulled low metal-oxide-semiconductor VE and is in cut-off state, and above-mentioned working method is repeated when OUT1 voltages are less than setting value.
The first tap of primary side 1 and the tap 3 of primary side the 3rd of the two-winding transformer are Same Name of Ends, the double winding transformation
The second tap of primary side 2 and the tap 4 of primary side the 4th of device are Same Name of Ends, the first tap of secondary 8 of the two-winding transformer and pair
The tap 6 of side the 3rd is Same Name of Ends, and the second tap of secondary 7 and the tap 5 of secondary the 4th of the two-winding transformer are Same Name of Ends.
In present embodiment, a kind of self-maintained circuit is applied in LED illumination driving, using the topological structure of flyback,
Multigroup stable power-supplying is realized by the power supply winding for increasing transformer.External MOS is according to the appropriate type selecting of actual power.Self-oscillation
Circuit is operated in discontinuous mode, and the loss of switching tube and transformer is low.
Embodiment described above only expresses one embodiment of the present invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention
Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (2)
- A kind of 1. self-maintained circuit, it is characterised in that：Including：First polar capacitor, the second polar capacitor, the first electric capacity, Two electric capacity, the 3rd electric capacity, the 4th electric capacity, first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th electricity Resistance, the 7th resistance, the 8th resistance, the first diode, the second diode, the 3rd diode, the 4th diode, the 5th diode, 6th diode, voltage-regulator diode, voltage-stablizer, the first transistor, second transistor, metal-oxide-semiconductor, two-winding transformer；The tap of primary side the 3rd of one end connection voltage input end, two-winding transformer of the first resistor, the one of the 8th resistance End and one end of the first electric capacity, other end connection one end of second resistance of the first resistor, the negative pole of the 4th diode, the One end of four electric capacity and the negative electrode of voltage-stablizer, the anode of the voltage-stablizer connect one end of the 7th resistance, the 4th electric capacity it is another End, the positive pole of voltage-regulator diode, the tap of two-winding transformer primary side second, the colelctor electrode of the first transistor, second transistor One end of emitter stage, one end of the second electric capacity and the 4th resistance, and be grounded, the electricity of voltage input end connection the 7th of the voltage-stablizer One end of the other end of resistance and the 6th resistance, the other end of the 6th resistance connect the first output end, the 4th diode Positive pole connection the other end of second resistance, one end of the 3rd electric capacity, the positive pole of the 5th diode, the negative pole of voltage-regulator diode and The base stage of the first transistor, the negative pole of the 5th diode connect the positive pole of the 6th diode, and the 6th diode is born The pole connection colelctor electrode of the first transistor, the grid of metal-oxide-semiconductor, the other end of the second electric capacity and the colelctor electrode of second transistor, institute One end of the base stage connection 3rd resistor of second transistor is stated, the other end of the 3rd resistor connects the other end of the 4th resistance With the source electrode of metal-oxide-semiconductor, the other end of the 3rd electric capacity connects one end of the 5th resistance, the other end connection of the 5th resistance The tap of primary side first of two-winding transformer, the other end of the 8th resistance connect the other end and the three or two pole of the first electric capacity The negative pole of pipe, the drain electrode of positive pole connection metal-oxide-semiconductor and the tap of primary side the 4th of two-winding transformer of the 3rd diode are described Second diode cathode connects the tap of secondary the 4th of two-winding transformer, and the negative pole of second diode connects the second polarity The positive pole of electric capacity, and the first output end is used as, the secondary the 3rd of the negative pole connection two-winding transformer of second polar capacitor The negative pole of tap, the tap of secondary first of two-winding transformer and the first polar capacitor, and be grounded, first diode is just Pole connects the tap of secondary second of two-winding transformer, and the negative pole of first diode connects the positive pole of the first polar capacitor simultaneously As the second output end.
- 2. self-maintained circuit according to claim 1, it is characterised in that the primary side first of the two-winding transformer is taken out Head and the tap of primary side the 3rd are Same Name of Ends, and the tap of primary side second and the tap of primary side the 4th of the two-winding transformer are of the same name End, the tap of secondary first and the tap of secondary the 3rd of the two-winding transformer are Same Name of Ends, the pair of the two-winding transformer The tap of side second and the tap of secondary the 4th are Same Name of Ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751770.3A CN107612354B (en) | 2017-08-28 | 2017-08-28 | Self-excited oscillation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710751770.3A CN107612354B (en) | 2017-08-28 | 2017-08-28 | Self-excited oscillation circuit |
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| Publication Number | Publication Date |
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| CN107612354A true CN107612354A (en) | 2018-01-19 |
| CN107612354B CN107612354B (en) | 2020-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710751770.3A Active CN107612354B (en) | 2017-08-28 | 2017-08-28 | Self-excited oscillation circuit |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137695A (en) * | 1998-01-06 | 2000-10-24 | Murata Manufacturing Co., Ltd. | Self-oscillation type switching power supply and method |
| US6404654B1 (en) * | 2001-06-26 | 2002-06-11 | Jue Wang | Self-oscillation type resonant flyback converter utilizing charge stored effect of the P-N diode |
| US6480401B2 (en) * | 2001-03-13 | 2002-11-12 | Astec International Limited | Method and apparatus for reducing standby power in power supplies |
| CN101453169A (en) * | 2008-12-02 | 2009-06-10 | 广州金升阳科技有限公司 | Self-oscillation starting output end controlled anti exciting converter |
| CN201336746Y (en) * | 2008-05-05 | 2009-10-28 | 汤征宁 | Constant current and voltage drive circuit for AC power supply LED |
| CN101656484A (en) * | 2008-07-01 | 2010-02-24 | 技领半导体(上海)有限公司 | Three-pin package constant current and voltage controller in critical conduction mode |
| CN106575915A (en) * | 2014-09-12 | 2017-04-19 | 飞利浦照明控股有限公司 | Power supply circuits |
| CN206180881U (en) * | 2016-10-10 | 2017-05-17 | 成都市壹艺工艺品有限公司 | Pottery art drying equipment's circulation oscillation mode power supply circuit for temperature control system |
-
2017
- 2017-08-28 CN CN201710751770.3A patent/CN107612354B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6137695A (en) * | 1998-01-06 | 2000-10-24 | Murata Manufacturing Co., Ltd. | Self-oscillation type switching power supply and method |
| US6480401B2 (en) * | 2001-03-13 | 2002-11-12 | Astec International Limited | Method and apparatus for reducing standby power in power supplies |
| US6404654B1 (en) * | 2001-06-26 | 2002-06-11 | Jue Wang | Self-oscillation type resonant flyback converter utilizing charge stored effect of the P-N diode |
| CN201336746Y (en) * | 2008-05-05 | 2009-10-28 | 汤征宁 | Constant current and voltage drive circuit for AC power supply LED |
| CN101656484A (en) * | 2008-07-01 | 2010-02-24 | 技领半导体(上海)有限公司 | Three-pin package constant current and voltage controller in critical conduction mode |
| CN101453169A (en) * | 2008-12-02 | 2009-06-10 | 广州金升阳科技有限公司 | Self-oscillation starting output end controlled anti exciting converter |
| CN106575915A (en) * | 2014-09-12 | 2017-04-19 | 飞利浦照明控股有限公司 | Power supply circuits |
| CN206180881U (en) * | 2016-10-10 | 2017-05-17 | 成都市壹艺工艺品有限公司 | Pottery art drying equipment's circulation oscillation mode power supply circuit for temperature control system |
Non-Patent Citations (1)
| Title |
|---|
| 户川治朗: "《实用电源电路设计手册》", 31 July 1990 * |
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Effective date of registration: 20200812 Address after: 528400 3rd floor, 1st floor and 3rd floor, building a, No. 5, Futian 10th Road, Gangkou Town, Zhongshan City, Guangdong Province Patentee after: Guangdong Mingfeng Power Technology Co., Ltd Address before: 528447 Guangdong city in Zhongshan Province town of Wood River straight port Street No. 16 Patentee before: GUANGDONG MINGFIRST POWER INDUSTRIAL Co.,Ltd. |