CN104935155B - A kind of method for designing for DC D/C power Ripple Suppressions - Google Patents
A kind of method for designing for DC D/C power Ripple Suppressions Download PDFInfo
- Publication number
- CN104935155B CN104935155B CN201510327417.3A CN201510327417A CN104935155B CN 104935155 B CN104935155 B CN 104935155B CN 201510327417 A CN201510327417 A CN 201510327417A CN 104935155 B CN104935155 B CN 104935155B
- Authority
- CN
- China
- Prior art keywords
- circuit
- secondary side
- resistance
- output end
- electric capacity
- 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.)
- Active
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Power Conversion In General (AREA)
- Amplifiers (AREA)
- Networks Using Active Elements (AREA)
- Semiconductor Integrated Circuits (AREA)
Abstract
The present invention provides a kind of method for designing for DC D/C power Ripple Suppressions, and it implements process and is：Lateral circuit of input and the secondary side circuit of output end are set, filter circuit is respectively provided with a lateral circuit and secondary side circuit, suppress low-frequency ripple；Isolation circuit is set between lateral circuit and secondary side circuit at one time, the high-frequency ripple between two filter circuits is filtered.Compared to the prior art this be used for the method for designing of DC D/C power Ripple Suppressions, has considered the input processing to DC D/C powers, has exported treatment and the treatment on ground, realizes effective suppression of dc source ripple, high safety, energy consumption is low, practical, it is easy to promote.
Description
Technical field
The present invention relates to computer power supply technical field, specifically a kind of setting for DC-DC power source Ripple Suppression
Meter method.
Background technology
It is unique it is essential that power supply for electronic product, but it also brings line in addition to providing energy
Ripple, noise etc. influence the influence of electronic product normal work.Ripple voltage is put to height, local oscillator, mixing, filtering, detection, A/D become
The circuit such as changing can all produce influence.At present, the advantages of Switching Power Supply is with its small volume, efficiency high is in equipment such as computer, communications
In be widely applied, but for the output voltage ripple less occasion of requirement, the output voltage of traditional switch Power Management Design
Ripple is larger, can not still reach design requirement.Switching Power Supply output ripple is mainly derived from the following aspects：
（1）, low-frequency ripple it is related to the filter capacitor capacity of input, output circuit, the capacity of filter capacitor can not possibly nothing
Limitation ground increases, and causes the residual of output low frequency ripple；
（2）The high-frequency noise ripple of the generations such as high frequency power switch transformed circuit, capacitor and inductor charge and discharge process；
（3）Common-mode noise caused by the presence of parasitic parameter.
Based on this, the present invention provides a kind of method for designing for DC-DC power source Ripple Suppression for solving above-mentioned problem.
The content of the invention
Technical assignment of the invention is directed in the deficiencies in the prior art, there is provided one kind is used for DC-DC power source Ripple Suppression
Method for designing.
The technical scheme is that realize in the following manner, a kind of design for DC-DC power source Ripple Suppression
Method, the method is realized by following steps：
Lateral circuit of input and the secondary side circuit of output end are set, in a lateral circuit and secondary side circuit
Filter circuit is respectively provided with, suppresses low-frequency ripple；
Isolation circuit is set between lateral circuit and secondary side circuit at one time, the high frequency waves between two filter circuits are filtered
Line.
Lateral circuit includes being arranged on the LC low-pass filter circuits of voltage input end, suppresses low-frequency ripple；It is secondary
Lateral circuit includes being arranged on the active low-pass filter circuit of voltage output end, filters the low-frequency ripple of output end.
The LC low-pass filter circuits areType filter circuit, the i.e. filter circuit include two electric capacity C1, C2, an electricity
Sense L：Voltage input end is divided into two branch roads, is followed by primary side reference ground by electric capacity C1 all the way, another road by after inductance L again
It is secondary to be divided into two branch roads and respectively connection voltage output end and be followed by primary side reference ground by electric capacity C2.
The active low-pass filter circuit includes resistance-capacitance network, the metal-oxide-semiconductor of operational amplifier, resistance and electric capacity composition, institute
Resistance-capacitance network is stated including resistance R1, R2, R3, R4 and electric capacity C4, C5, the input connection control source positive pole of wherein electric capacity C4 and
Voltage output positive pole, output end are respectively connected to the in-phase input end of operational amplifier and the input of resistance R1, resistance R1's
Output end is also connected with the drain electrode of control source negative pole and metal-oxide-semiconductor；The input connection control source positive pole and voltage of resistance R2 are defeated
Go out positive pole, the in-phase input end of output end concatenation operation amplifier；Input connection control source positive pole and the voltage of resistance R3
The input of output cathode, output end connection resistance R4, the output end connection voltage output negative pole of resistance R4；Above-mentioned computing is put
The inverting input of big device connects the grid of metal-oxide-semiconductor by connection voltage output negative pole, output end after electric capacity C5, the metal-oxide-semiconductor
Source electrode is also connected with voltage output negative pole.
The isolation circuit between lateral circuit and secondary side circuit is that a secondary side reference ground is joined to primary side
The low impedance at high frequency loop on ground is examined, the high-frequency noise in secondary side reference ground is flowed to primary side reference ground through the loop, so that
Suppress secondary side high frequency ripple.
The isolation circuit includes being arranged on the earthed circuit at a lateral circuit, the electricity of the ground connection at secondary side circuit
Road, the safety electric capacity C3 being arranged between two earthed circuits, the earthed circuit at a lateral circuit refers to a lateral circuit
Output end is followed by primary side reference ground through a metal-oxide-semiconductor and resistance, and the earthed circuit at secondary side circuit refers to secondary side electricity
The output end on road is directly connected to secondary side reference ground.
Parasitic capacitance is additionally provided between lateral circuit and secondary side circuit described one time.
The produced compared with prior art beneficial effect of the present invention is：
A kind of method for designing for DC-DC power source Ripple Suppression of the invention has been considered to the defeated of DC-DC power source
Enter treatment, output treatment and the treatment on ground, realize effective suppression of dc source ripple, high safety, energy consumption is low, practical
Property is strong, it is easy to promote.
Brief description of the drawings
Accompanying drawing 1 is overall structure diagram of the invention.
Accompanying drawing 2 is LC low-pass filter circuits figure of the invention.
Accompanying drawing 3 is active filter circuit figure of the invention.
Accompanying drawing 4 is primary side of the invention and secondary side reference ground process circuit figure.
Specific embodiment
Following is made to a kind of method for designing for DC-DC power source Ripple Suppression provided by the present invention below in conjunction with the accompanying drawings
Describe in detail.
The present invention proposes a kind of method for designing for DC-DC power source Ripple Suppression, and as shown in Figure 1, the method passes through
Following steps are realized：
Lateral circuit of input and the secondary side circuit of output end are set, in a lateral circuit and secondary side circuit
Filter circuit is respectively provided with, suppresses low-frequency ripple；
Isolation circuit is set between lateral circuit and secondary side circuit at one time, the high frequency waves between two filter circuits are filtered
Line.
Lateral circuit includes being arranged on the LC low-pass filter circuits of voltage input end, suppresses low-frequency ripple；It is secondary
Lateral circuit includes being arranged on the active low-pass filter circuit of voltage output end, filters the low-frequency ripple of output end.
To effectively filter out low-frequency noise, using the measure of prime voltage stabilizing, the LC low-pass filter circuits areType filtered electrical
Road, circuit diagram is as shown in Figure 2.Vin is input voltage, and GND_in is the reference ground for being input into primary side.The filter circuit bag
Include two electric capacity C1, C2, an inductance L：Voltage input end is divided into two branch roads, and being followed by primary side by electric capacity C1 all the way refers to
Ground, another road is by being again broken down into two branch roads and respectively connection voltage output end and being followed by once by electric capacity C2 after inductance L
Side reference ground.
For the noise of lower frequency, LC low pass filters cannot be filtered completely, and be used by operational amplifier, RC capacitance-resistances
The active low-pass filter of network and high-power MOS FET compositions, can be very good to filter the low-frequency noise of residual.Circuit is illustrated
Figure is as shown in figure 3, the active low-pass filter circuit includes resistance-capacitance network, the MOS of operational amplifier, resistance and electric capacity composition
Pipe, the resistance-capacitance network includes resistance R1, R2, R3, R4 and electric capacity C4, C5, the input connection control source of wherein electric capacity C4
Positive pole and voltage output positive pole, output end are respectively connected to the in-phase input end of operational amplifier and the input of resistance R1, the electricity
The output end for hindering R1 is also connected with the drain electrode of control source negative pole and metal-oxide-semiconductor；Resistance R2 input connection control source positive pole and
The in-phase input end of voltage output positive pole, output end concatenation operation amplifier；The input connection control source positive pole of resistance R3
With voltage output positive pole, the input of output end connection resistance R4, the output end connection voltage output negative pole of resistance R4；It is above-mentioned
The inverting input of operational amplifier, should by connecting the grid that voltage output negative pole, output end connect metal-oxide-semiconductor after electric capacity C5
The source electrode of metal-oxide-semiconductor is also connected with voltage output negative pole.
The isolation circuit between lateral circuit and secondary side circuit is that a secondary side reference ground is joined to primary side
The low impedance at high frequency loop on ground is examined, the high-frequency noise in secondary side reference ground is flowed to primary side reference ground through the loop, so that
Suppress secondary side high frequency ripple.
Dc source typically carries out security isolation using isolation circuit, and this is accomplished by joining primary side reference ground and secondary side
Processed with examining.Because the presence of the switching process, the charge and discharge process, parasitic parameter of capacitor and inductor of switching device can be produced
Raw high-frequency noise, the noise is eventually flowed into secondary side reference ground, causes secondary side to produce high frequency ripple.Made an uproar for this
Sound, we build a secondary side reference ground to the low impedance at high frequency loop of primary side reference ground, make secondary using safety electric capacity
High-frequency noise in the reference ground of side flows to primary side reference ground through the loop, so as to suppress secondary side high frequency ripple.Circuit is illustrated
Figure such as figure, shown in 4.GND_out is secondary side reference ground, and C3 is safety electric capacity.
Based on accompanying drawing 4, the isolation circuit includes being arranged on earthed circuit, the secondary side circuit at a lateral circuit
The earthed circuit at place, the safety electric capacity C3 being arranged between two earthed circuits, the earthed circuit at a lateral circuit refer to this one
The output end of secondary lateral circuit is followed by primary side reference ground through a metal-oxide-semiconductor and resistance, and the earthed circuit at secondary side circuit refers to
The output end of the secondary side circuit is directly connected to secondary side reference ground.
Parasitic capacitance is additionally provided between lateral circuit and secondary side circuit described one time.
Above-mentioned specific embodiment is only specific case of the invention, and scope of patent protection of the invention is included but is not limited to
Above-mentioned specific embodiment, any right for meeting a kind of method for designing for DC-DC power source Ripple Suppression of the invention will
The appropriate change or replacement that ask book and any technical field those of ordinary skill is done to it, should all fall into the present invention
Scope of patent protection.
Claims (6)
1. a kind of method for designing for DC-DC power source Ripple Suppression, it is characterised in that the method is realized by following steps：
Lateral circuit of input and the secondary side circuit of output end are set, are all provided with a lateral circuit and secondary side circuit
Filter circuit is put, suppresses low-frequency ripple；
Isolation circuit is set between lateral circuit and secondary side circuit at one time, the high-frequency ripple between two filter circuits is filtered；
Lateral circuit includes being arranged on the LC low-pass filter circuits of voltage input end, suppresses low-frequency ripple；Secondary side electricity
Road includes being arranged on the active low-pass filter circuit of voltage output end, filters the low-frequency ripple of output end；
The active low-pass filter circuit includes resistance-capacitance network, the metal-oxide-semiconductor of operational amplifier, resistance and electric capacity composition, the resistance
Content network includes resistance R1, R2, R3, R4 and electric capacity C4, C5, input connection control source positive pole and the voltage of wherein electric capacity C4
Output cathode, output end are respectively connected to the in-phase input end of operational amplifier and the input of resistance R1, the output of resistance R1
End is also connected with the drain electrode of control source negative pole and metal-oxide-semiconductor；The input connection control source positive pole and voltage output of resistance R2 are just
Pole, the in-phase input end of output end concatenation operation amplifier；Input connection control source positive pole and the voltage output of resistance R3
The input of positive pole, output end connection resistance R4, the output end connection voltage output negative pole of resistance R4；Above-mentioned operational amplifier
Inverting input by connecting the grid that voltage output negative pole, output end connect metal-oxide-semiconductor, the source electrode of the metal-oxide-semiconductor after electric capacity C5
It is also connected with voltage output negative pole.
2. a kind of method for designing for DC-DC power source Ripple Suppression according to claim 1, it is characterised in that described
LC low-pass filter circuits areType filter circuit, the i.e. filter circuit include two electric capacity C1, C2, an inductance L：Control source
End is divided into two branch roads, is followed by primary side reference ground by electric capacity C1 all the way, and another road is by being again broken down into two branch after inductance L
Road and respectively connection and are followed by primary side reference ground at voltage output end by electric capacity C2.
3. a kind of method for designing for DC-DC power source Ripple Suppression according to claim 1 and 2, it is characterised in that institute
It is high frequency of the secondary side reference ground to primary side reference ground to state an isolation circuit between lateral circuit and secondary side circuit
Low-impedance path, makes the high-frequency noise in secondary side reference ground flow to primary side reference ground through the loop, so as to suppress secondary side
High frequency ripple.
4. a kind of method for designing for DC-DC power source Ripple Suppression according to claim 3, it is characterised in that described
Isolation circuit includes being arranged on the earthed circuit at a lateral circuit, the earthed circuit at secondary side circuit, being arranged on two
Safety electric capacity C3 between earthed circuit, the earthed circuit at a lateral circuit refers to an output end for lateral circuit through one
Metal-oxide-semiconductor and resistance are followed by primary side reference ground, and the earthed circuit at secondary side circuit refers to that the output end of the secondary side circuit is straight
Secondary side reference ground is connect in succession.
5. a kind of method for designing for DC-DC power source Ripple Suppression according to claim 3, it is characterised in that described
Parasitic capacitance is additionally provided between lateral circuit and secondary side circuit one time.
6. a kind of method for designing for DC-DC power source Ripple Suppression according to claim 4, it is characterised in that described
Parasitic capacitance is additionally provided between lateral circuit and secondary side circuit one time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510327417.3A CN104935155B (en) | 2015-06-15 | 2015-06-15 | A kind of method for designing for DC D/C power Ripple Suppressions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510327417.3A CN104935155B (en) | 2015-06-15 | 2015-06-15 | A kind of method for designing for DC D/C power Ripple Suppressions |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104935155A CN104935155A (en) | 2015-09-23 |
| CN104935155B true CN104935155B (en) | 2017-06-20 |
Family
ID=54122175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510327417.3A Active CN104935155B (en) | 2015-06-15 | 2015-06-15 | A kind of method for designing for DC D/C power Ripple Suppressions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104935155B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105553244B (en) * | 2015-12-22 | 2018-05-29 | 矽力杰半导体技术(杭州)有限公司 | Electromagnetic interface filter and apply its Switching Power Supply |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08272461A (en) * | 1995-03-30 | 1996-10-18 | Seiko Instr Inc | Voltage regulator |
| EP1387495A1 (en) * | 2002-07-31 | 2004-02-04 | Northrop Grumman Space & Mission Systems Corp. | Low noise switched low pass filter with benign transients |
| CN101515726A (en) * | 2009-02-24 | 2009-08-26 | 苏州工业园区华波电子科技有限公司 | High-efficiency high power factor charger circuit |
| CN201667611U (en) * | 2010-03-25 | 2010-12-08 | 江苏新大石油技术服务有限公司 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
| CN201937461U (en) * | 2010-12-31 | 2011-08-17 | 深圳桑达国际电子器件有限公司 | Current ripple inhibition circuit and power supply |
| CN102789253A (en) * | 2011-05-18 | 2012-11-21 | 上海华建电力设备股份有限公司 | 4-20mA current output circuit controlled by PWM (pulse-width modulation) |
| CN202840928U (en) * | 2012-04-06 | 2013-03-27 | 四川省送变电建设有限责任公司 | Isolation type anti-interference power secondary system |
-
2015
- 2015-06-15 CN CN201510327417.3A patent/CN104935155B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08272461A (en) * | 1995-03-30 | 1996-10-18 | Seiko Instr Inc | Voltage regulator |
| EP1387495A1 (en) * | 2002-07-31 | 2004-02-04 | Northrop Grumman Space & Mission Systems Corp. | Low noise switched low pass filter with benign transients |
| CN101515726A (en) * | 2009-02-24 | 2009-08-26 | 苏州工业园区华波电子科技有限公司 | High-efficiency high power factor charger circuit |
| CN201667611U (en) * | 2010-03-25 | 2010-12-08 | 江苏新大石油技术服务有限公司 | System for inhibiting higher harmonic interference of frequency converter by compound heat carrier generator control system |
| CN201937461U (en) * | 2010-12-31 | 2011-08-17 | 深圳桑达国际电子器件有限公司 | Current ripple inhibition circuit and power supply |
| CN102789253A (en) * | 2011-05-18 | 2012-11-21 | 上海华建电力设备股份有限公司 | 4-20mA current output circuit controlled by PWM (pulse-width modulation) |
| CN202840928U (en) * | 2012-04-06 | 2013-03-27 | 四川省送变电建设有限责任公司 | Isolation type anti-interference power secondary system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104935155A (en) | 2015-09-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101304239B (en) | Power amplification circuit, radio frequency transmitter as well as base station equipment | |
| TWI478473B (en) | Power supplying apparatus | |
| CN101651408A (en) | Filtering module inhibiting common mode noise and differential mode noise | |
| WO2019010858A1 (en) | Circuit structure and method for improving harmonic suppression capability of radio frequency power amplifier | |
| CN105811888A (en) | Radio frequency power amplifier output match circuit structure and designing method thereof | |
| CN104935155B (en) | A kind of method for designing for DC D/C power Ripple Suppressions | |
| CN105356740B (en) | Inhibit the electrical energy transformer of structure with electromagnetic interference | |
| CN206041939U (en) | RF power amplifier output matching circuit structure | |
| CN105915033A (en) | LCL filterer passive resonance damping circuit and method | |
| CN107482934A (en) | A kind of rectifier | |
| CN211296713U (en) | Broadband injection locking divide-by-four frequency divider comprising transformer coupling divide-by-three | |
| CN106602850B (en) | A kind of power supply ripple suppression circuit and method from coupling | |
| Ali et al. | Integrated hybrid EMI filter: Study and realization of the active part | |
| CN104797064A (en) | Emc circuit | |
| CN104038087A (en) | Dielectric barrier discharge-type ozone generator power supply without intermediate-frequency or high-frequency step-up transformer | |
| CN206629033U (en) | The Dolby circuit of big data processing | |
| CN206728280U (en) | A kind of binaural sound amplifying circuit | |
| CN107171580B (en) | A kind of gauze compensation circuit for AC-DC converter | |
| CN208241567U (en) | A kind of submersible motor power conditioner | |
| CN102142701B (en) | Handheld equipment charging device adopting stereo equipment for supplying power | |
| TW201103254A (en) | Amplifier circuit | |
| CN108933575A (en) | A kind of D-type audio power amplifier for portable audio product | |
| CN207994631U (en) | High-power notch filter | |
| CN205510370U (en) | Reduce PCB circuit structure of earphone signal noise jamming | |
| CN203912299U (en) | Novel electronic ballast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Ruidong Inventor after: Tan Lin Inventor after: Geng Shihua Inventor after: Chen Naikuo Inventor before: Tan Lin Inventor before: Geng Shihua Inventor before: Chen Naikuo |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 250100, No. 2877, fairway, Sun Town, Ji'nan hi tech Zone, Shandong Patentee after: SHANDONG CHAOYUE CNC ELECTRONICS Co.,Ltd. Address before: 250100, No. 2877, fairway, Sun Town, Ji'nan hi tech Zone, Shandong Patentee before: SHANDONG CHAOYUE NUMERICAL CONTROL ELECTRONIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |