CN107317482A - A kind of self-powered circuit of synchronous rectification and its Switching Power Supply - Google Patents
A kind of self-powered circuit of synchronous rectification and its Switching Power Supply Download PDFInfo
- Publication number
- CN107317482A CN107317482A CN201710756417.4A CN201710756417A CN107317482A CN 107317482 A CN107317482 A CN 107317482A CN 201710756417 A CN201710756417 A CN 201710756417A CN 107317482 A CN107317482 A CN 107317482A
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- Prior art keywords
- circuit
- self
- synchronous rectification
- oxide
- semiconductor
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 43
- 239000004065 semiconductor Substances 0.000 claims abstract description 47
- 230000009467 reduction Effects 0.000 claims abstract description 28
- 238000004804 winding Methods 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 11
- 230000006837 decompression Effects 0.000 claims description 11
- 230000005611 electricity Effects 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 2
- 238000006243 chemical reaction Methods 0.000 abstract description 7
- 230000005669 field effect Effects 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses a kind of self-powered circuit of synchronous rectification, including metal-oxide-semiconductor, produce transformer of the synchronous drive signal to control the metal-oxide-semiconductor, the self-powered circuit of synchronous rectification also includes current-limiting circuit, the first reduction voltage circuit and the first bleeder circuit, and the output end of the transformer after the current-limiting circuit being sequentially connected in series, first reduction voltage circuit and first bleeder circuit with the metal-oxide-semiconductor by being connected.The invention also discloses a kind of Switching Power Supply with the self-powered circuit of synchronous rectification.The present invention can not only improve the conversion efficiency of power supply but also can avoid puncturing metal-oxide-semiconductor.
Description
Technical field
The present invention relates to switch power technology field, and in particular to a kind of self-powered circuit of synchronous rectification and its Switching Power Supply.
Background technology
Switching Power Supply is as a kind of high frequency device for converting electric energy, and it is to utilize electronic switching device（As transistor, field are imitated
Ying Guan, controllable silicon thyristor etc.）, by controlling circuit, make electronic switching device ceaselessly " on " and " shut-off ", allow electronic cutting
Close device and impulse modulation is carried out to input voltage, so that DC/AC, DC/DC voltage transformation are realized, and output voltage can reconcile certainly
Dynamic voltage stabilizing.
In order to reduce the rectifier loss present in the Switching Power Supply using commutation diode, partial switch power supply is had at present
Using the extremely low field-effect transistor of on state resistance, i.e. metal-oxide-semiconductor to replace commutation diode to realize that the self-powered of Switching Power Supply is same
Walk rectification.Metal-oxide-semiconductor belongs to voltage-controlled device, therefore, and mostly in Switching Power Supply at this stage connected by Transformer Winding
Connect current-limiting resistance to directly drive metal-oxide-semiconductor, metal-oxide-semiconductor conducting is reached the purpose of synchronous rectification.But the circuit of synchronous rectification
The conversion efficiency of Switching Power Supply can be not only reduced, but also it is breakdown to be easily caused field-effect transistor.
The content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of self-powered circuit of synchronous rectification, both may be used
Field-effect transistor can be avoided breakdown again with the conversion efficiency for improving power supply.
The purpose of the present invention is achieved through the following technical solutions：
A kind of self-powered circuit of synchronous rectification, including metal-oxide-semiconductor, produce transformation of the synchronous drive signal to control the metal-oxide-semiconductor
Device, the self-powered circuit of synchronous rectification also includes current-limiting circuit, the first reduction voltage circuit and the first bleeder circuit, the transformer
Output end by after the current-limiting circuit being sequentially connected in series, first reduction voltage circuit and first bleeder circuit with it is described
Metal-oxide-semiconductor is connected.
It is preferred that, one end of the secondary windings of the transformer is connected with the input of the current-limiting circuit, the transformation
The other end ground connection of the secondary windings of device, the centre cap of the secondary windings of transformer source electrode respectively with the metal-oxide-semiconductor,
The output end connection of first bleeder circuit, the grid of the metal-oxide-semiconductor is connected to first reduction voltage circuit and described first
Between bleeder circuit, the drain electrode of the metal-oxide-semiconductor connects load.
It is preferred that, the self-powered circuit of synchronous rectification also include being series at the output end of first reduction voltage circuit with it is described
The second reduction voltage circuit between the grid of metal-oxide-semiconductor.
It is preferred that, the self-powered circuit of synchronous rectification also includes the second bleeder circuit, one end of second bleeder circuit
It is connected with the source electrode of the metal-oxide-semiconductor, the other end is connected between second reduction voltage circuit and the grid of the metal-oxide-semiconductor.
It is preferred that, the current-limiting circuit includes the first current-limiting resistance and the second current-limiting resistance in parallel.
It is preferred that, first reduction voltage circuit includes the first decompression capacitor and the second decompression capacitor in parallel.
It is preferred that, first bleeder circuit includes the first divider resistance.
It is preferred that, second reduction voltage circuit includes the 3rd decompression capacitor.
It is preferred that, second bleeder circuit includes the second divider resistance.
In order to solve identical technical problem, present invention also offers a kind of Switching Power Supply, including above-mentioned self-powered are synchronous
Rectification circuit.
Compared with prior art, the present invention has the advantages that：
The present invention between the output end of transformer and the metal-oxide-semiconductor by setting the current-limiting circuit being sequentially connected, the first decompression
Circuit and the first bleeder circuit, can so cause when the secondary windings of the transformer exports conducting, the transformer
Secondary windings exports synchronous drive waveforms to the metal-oxide-semiconductor simultaneously, to drive the metal-oxide-semiconductor to reach the mesh of output synchronous rectification
's.At the same time, it is ensured that in this process, the drive waveforms of the transformer output are after the current-limiting circuit current limliting, through institute
The decompression of the first reduction voltage circuit is stated, then again through the first bleeder circuit partial pressure, so as to drive the voltage of the metal-oxide-semiconductor not only steady
Determine and in the range of restriction, so that the conversion efficiency of power supply is improved, and avoid puncturing the metal-oxide-semiconductor, protect it from
Damage.
Brief description of the drawings
Fig. 1 is the circuit theory diagrams of the self-powered circuit of synchronous rectification of the embodiment of the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings.
As shown in figure 1, a kind of self-powered circuit of synchronous rectification of the preferred embodiment of the present invention, including metal-oxide-semiconductor Q1, generation are synchronously
Transformer T1 of the drive signal to control the metal-oxide-semiconductor Q1, wherein, the self-powered circuit of synchronous rectification also includes current limliting electricity
Road 1, the first reduction voltage circuit 2 and the first bleeder circuit 3, the output end of the transformer T1 are electric by the current limliting being sequentially connected in series
It is connected after road 1, first reduction voltage circuit 2 and first bleeder circuit 3 with the metal-oxide-semiconductor Q1.
Specifically, one end of the secondary windings of the transformer T1 is connected with the input of the current-limiting circuit 1, it is described to become
The other end ground connection of depressor T1 secondary windings, the centre cap of the secondary windings of the transformer T1 respectively with the metal-oxide-semiconductor
The output end connection of Q1 source electrode, first bleeder circuit 3, the grid of the metal-oxide-semiconductor Q1 is connected to the first decompression electricity
Between road 2 and first bleeder circuit 3, the drain electrode of the metal-oxide-semiconductor Q1 connects load.
Above-mentioned self-powered circuit of synchronous rectification drives the metal-oxide-semiconductor Q1 work using the transformer T1 [q1], when described
During transformer T1 secondary windings output conducting, the secondary windings of the transformer T1 exports synchronous drive waveforms to institute simultaneously
Metal-oxide-semiconductor Q1 is stated, to drive the metal-oxide-semiconductor Q1 to reach the purpose of output synchronous rectification.During being somebody's turn to do, the transformer T1 outputs
Drive waveforms are depressured after the current limliting of current-limiting circuit 1 through first reduction voltage circuit 2, then again through first partial pressure electricity
The partial pressure of road 3, so as to drive the voltage of the metal-oxide-semiconductor Q1 not only to stablize but also in the range of restriction, so that the conversion effect of power supply
Rate is improved, and avoids puncturing the metal-oxide-semiconductor Q1, protects it from being damaged.
In order to further improve the conversion efficiency of the self-powered circuit of synchronous rectification and the protection of the metal-oxide-semiconductor Q1 be imitated
Really, exemplary, the self-powered circuit of synchronous rectification can also include output end and the institute for being series at first reduction voltage circuit 2
State the second reduction voltage circuit 4 between metal-oxide-semiconductor Q1 grid.Preferably, the self-powered circuit of synchronous rectification can also include second
Bleeder circuit 5, one end of second bleeder circuit 5 is connected with the source electrode of the metal-oxide-semiconductor Q1, and the other end is connected to described second
Between reduction voltage circuit 4 and the metal-oxide-semiconductor Q1 grid.It is, of course, also possible to increase bleeder circuit and reduction voltage circuit as needed
Quantity.
Exemplary in order to simplify circuit, the current-limiting circuit 1 can include the first current-limiting resistance R1 and second in parallel
Current-limiting resistance R2.First reduction voltage circuit 2 can include the first decompression capacitor C1 and the second decompression capacitor C2 in parallel.It is described
First bleeder circuit 3 can include the first divider resistance R3.Second reduction voltage circuit 4 can include the 3rd decompression capacitor C3.
Second bleeder circuit 5 can include the second divider resistance R4.
The embodiment of the present invention additionally provides a kind of Switching Power Supply with above-mentioned self-powered circuit of synchronous rectification, to improve power supply
Conversion efficiency and the metal-oxide-semiconductor Q1 is protected.Exemplary, after synchronous rectification is realized, the first filter can also be passed through
Ripple electric capacity C4, the first filter inductance L1, the second filter capacitor C5, the 3rd filter capacitor C6 and the 4th filter capacitor C7 are to output
Rectified wave be filtered.
The implementation of the present invention is not limited to this, according to the above of the present invention, is known using the ordinary skill of this area
Know and customary means, under the premise of above-mentioned basic fundamental thought of the invention is not departed from, the present invention can also make other a variety of shapes
Modification, replacement or the change of formula, all fall within rights protection scope of the present invention.
Claims (10)
1. a kind of self-powered circuit of synchronous rectification, including metal-oxide-semiconductor, produce change of the synchronous drive signal to control the metal-oxide-semiconductor
Depressor, it is characterised in that the self-powered circuit of synchronous rectification also includes current-limiting circuit, the first reduction voltage circuit and the first partial pressure electricity
Road, the output end of the transformer passes through the current-limiting circuit that is sequentially connected in series, first reduction voltage circuit and described first
It is connected after bleeder circuit with the metal-oxide-semiconductor.
2. self-powered circuit of synchronous rectification as claimed in claim 1, it is characterised in that one end of the secondary windings of the transformer
It is connected with the input of the current-limiting circuit, the other end ground connection of the secondary windings of the transformer, the secondary of the transformer
The centre cap of winding source electrode respectively with the metal-oxide-semiconductor, the output end of first bleeder circuit are connected, the metal-oxide-semiconductor
Grid is connected between first reduction voltage circuit and first bleeder circuit, and the drain electrode of the metal-oxide-semiconductor connects load.
3. self-powered circuit of synchronous rectification as claimed in claim 2, it is characterised in that the self-powered circuit of synchronous rectification also includes
It is series at the second reduction voltage circuit between the output end of first reduction voltage circuit and the grid of the metal-oxide-semiconductor.
4. self-powered circuit of synchronous rectification as claimed in claim 3, it is characterised in that the self-powered circuit of synchronous rectification also includes
Second bleeder circuit, one end of second bleeder circuit is connected with the source electrode of the metal-oxide-semiconductor, and the other end is connected to described second
Between the grid of reduction voltage circuit and the metal-oxide-semiconductor.
5. the self-powered circuit of synchronous rectification as described in claim any one of 1-4, it is characterised in that the current-limiting circuit is included simultaneously
The first current-limiting resistance and the second current-limiting resistance of connection.
6. self-powered circuit of synchronous rectification as claimed in claim 5, it is characterised in that first reduction voltage circuit includes in parallel
First decompression capacitor and the second decompression capacitor.
7. self-powered circuit of synchronous rectification as claimed in claim 6, it is characterised in that first bleeder circuit includes first point
Piezoresistance.
8. self-powered circuit of synchronous rectification as claimed in claim 7, it is characterised in that second reduction voltage circuit includes the 3rd drop
Voltage capacitance.
9. self-powered circuit of synchronous rectification as claimed in claim 8, it is characterised in that second bleeder circuit includes second point
Piezoresistance.
10. a kind of Switching Power Supply, it is characterised in that including：Self-powered circuit of synchronous rectification described in claim any one of 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710756417.4A CN107317482B (en) | 2017-08-29 | 2017-08-29 | Self-driven synchronous rectification circuit and switching power supply thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710756417.4A CN107317482B (en) | 2017-08-29 | 2017-08-29 | Self-driven synchronous rectification circuit and switching power supply thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107317482A true CN107317482A (en) | 2017-11-03 |
| CN107317482B CN107317482B (en) | 2024-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710756417.4A Active CN107317482B (en) | 2017-08-29 | 2017-08-29 | Self-driven synchronous rectification circuit and switching power supply thereof |
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| Country | Link |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033016A (en) * | 2001-07-09 | 2003-01-31 | Nec Computertechno Ltd | Switching power supply |
| JP2004274823A (en) * | 2003-03-05 | 2004-09-30 | Tdk Corp | Switching power supply |
| US20060133116A1 (en) * | 2004-12-17 | 2006-06-22 | Schaible Todd M | Synchronous rectifier gate drive shutdown circuit |
| JP2007097377A (en) * | 2005-09-30 | 2007-04-12 | Shindengen Electric Mfg Co Ltd | Synchronous rectification driving circuit |
| TW200915707A (en) * | 2007-09-21 | 2009-04-01 | Glacialtech Inc | Forward converter with self-driven synchronous rectifier |
| CN105846700A (en) * | 2016-03-29 | 2016-08-10 | 广州视源电子科技股份有限公司 | LLC half-bridge resonant converter and secondary synchronous rectifying device thereof |
| CN206341152U (en) * | 2016-12-26 | 2017-07-18 | 常州市创联电源科技股份有限公司 | A kind of output synchronous commutation self-driving circuit of positive activation type Switching Power Supply |
| CN107017789A (en) * | 2017-05-05 | 2017-08-04 | 苏州纽克斯电源技术股份有限公司 | Rectifying output circuit and its control method |
| CN207251479U (en) * | 2017-08-29 | 2018-04-17 | 广州市爱浦电子科技有限公司 | A kind of self-powered circuit of synchronous rectification and its Switching Power Supply |
-
2017
- 2017-08-29 CN CN201710756417.4A patent/CN107317482B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003033016A (en) * | 2001-07-09 | 2003-01-31 | Nec Computertechno Ltd | Switching power supply |
| JP2004274823A (en) * | 2003-03-05 | 2004-09-30 | Tdk Corp | Switching power supply |
| US20060133116A1 (en) * | 2004-12-17 | 2006-06-22 | Schaible Todd M | Synchronous rectifier gate drive shutdown circuit |
| JP2007097377A (en) * | 2005-09-30 | 2007-04-12 | Shindengen Electric Mfg Co Ltd | Synchronous rectification driving circuit |
| TW200915707A (en) * | 2007-09-21 | 2009-04-01 | Glacialtech Inc | Forward converter with self-driven synchronous rectifier |
| CN105846700A (en) * | 2016-03-29 | 2016-08-10 | 广州视源电子科技股份有限公司 | LLC half-bridge resonant converter and secondary synchronous rectifying device thereof |
| CN206341152U (en) * | 2016-12-26 | 2017-07-18 | 常州市创联电源科技股份有限公司 | A kind of output synchronous commutation self-driving circuit of positive activation type Switching Power Supply |
| CN107017789A (en) * | 2017-05-05 | 2017-08-04 | 苏州纽克斯电源技术股份有限公司 | Rectifying output circuit and its control method |
| CN207251479U (en) * | 2017-08-29 | 2018-04-17 | 广州市爱浦电子科技有限公司 | A kind of self-powered circuit of synchronous rectification and its Switching Power Supply |
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| 陈祥瑞: "一种新颖的BOOST型同步整流电源设计" * |
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| Publication number | Publication date |
|---|---|
| CN107317482B (en) | 2024-03-12 |
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