CN104917385B - A kind of noise reduction type isolation type high frequency square wave DC D/C powers - Google Patents
A kind of noise reduction type isolation type high frequency square wave DC D/C powers Download PDFInfo
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- CN104917385B CN104917385B CN201510265532.2A CN201510265532A CN104917385B CN 104917385 B CN104917385 B CN 104917385B CN 201510265532 A CN201510265532 A CN 201510265532A CN 104917385 B CN104917385 B CN 104917385B
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Abstract
A kind of noise reduction type isolation type high frequency square wave DC D/C powers, the present invention relates to micro power field, and it aims to solve the problem that existing square wave power easily by coil electromagnetism noise jamming, and output waveform has distortion, the technical problems such as transmission performance is low and output level is unreliable.The invention circuit structure feature includes power input, and power input connects the first winding of coil component, and the secondary winding of coil component is connected with noise and reduces module, and noise reduces module and is connected with Schmidt trigger.The present invention is used for power supply noise reduction.
Description
Technical field
The present invention relates to micro power field, and in particular to a kind of noise reduction type isolation type high frequency square wave DC-DC power source.
Background technology
In Power Management Design, generally power input is isolated with external circuit, not influenceed with protection power source by external circuit.Every
From there is two kinds of usual ways：Optical coupling and electromagnetic isolation.The problems such as LED is easy to aging, and transmission frequency is limited be present in optical coupling so that
Electromagnetic isolation turns into more excellent coupled modes.Electromagnetic isolation has the features such as speed is fast, and low in energy consumption and reliability is high.It is however, existing
There is electromagnetic isolation formula micro power, when input voltage is smaller, all kinds of electromagnetic interferences that micro power is subject to will can not ignore, and lead
Cause output waveform distortion, export it is unstable.Wherein, it is that electromagnetic noise causes little bellow caused by retarder especially prominently
The afterbody disturbance or vibration of shape, the noise level parameter is with transition waveform level parameters on the contrary, and in the afterbody of transition waveform
It is the most notable.Because medium voltage radix is too small, the noise can not be eliminated by common filter rectifier, so as to finally lead
The problems such as cause output waveform distorts, and transmission performance reduces and output level is unreliable.
The content of the invention
For above-mentioned prior art, present invention aims at provide a kind of noise reduction type isolation type high frequency square wave DC-DC
Power supply, it aims to solve the problem that existing square wave power easily by coil electromagnetism noise jamming, and output waveform has a distortion, and transmission performance is low and defeated
Go out the problems such as level is unreliable.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
A kind of noise reduction type isolation type high frequency square wave DC-DC power source, it is characterised in that including power input, power supply
Input connects the first winding of coil component, and the secondary winding of coil component is connected with noise and reduces module, and noise reduces mould
Block is connected with Schmidt trigger；
Described noise reduces module, including the output loop for waveform reconstruction, output loop include first switch S1
With second switch S2, secondary winding, the second switch S2 of first switch S1 and coil component are sequentially connected in series, first switch S1 with
The non-of second switch S2 is connected in series the positive input terminal for being a little also connected with Schmidt trigger, and second switch S2's and first switch
The non-of S1 is connected in series the negative input end for being a little also connected with Schmidt trigger；
Described noise reduces module, in addition to the short-circuit loop for truncation noise, and short-circuit loop includes and coil device
Part secondary winding the 3rd switch in parallel, the 4th switch connected with the 3rd switch.
In such scheme, described power input, including the first buffer register and the second buffer register in parallel；
Also include delayer, delayer is connected with the second buffer register.Power input, outlet chamber frequency and phase matched are provided, it is real
Now either synchronously or asynchronously transfer function.
In such scheme, described coil component, including miniature transformer, a kind of annular micro-transformer in particular,
Power input, outlet chamber form electromagnetic isolation, and have smaller coil electromagnetism noise.
In such scheme, described noise reduces module, and input feedback timing unit is each with being turned on or off automatically
The function of switch, its control input ON time, so as to be blocked to transition waveform, afterbody noise is filtered out, intercepted out effectively
Waveform；Schmidt trigger has the function that the transition waveform after reducing to noise carries out output waveform reconstruction, realizes complete, accurate
Really, reliable DC-DC outputs.
In such scheme, in addition to input feedback timing unit, input feedback timing unit include high level end connecting line
Enclose device secondary winding and low level end connects the first comparator of potential point in the first divider resistance；High level end connection second
Second comparator of the secondary winding of potential point and low level end connection coil component in divider resistance；S ends connection first is compared
Device output end and R ends connect the rest-set flip-flop of the second comparator output terminal；The monostable for also including being connected with rest-set flip-flop Q ends is touched
Device is sent out, monostable flipflop controls first switch, second switch by backfeed loop, also opened by connecting inverter controlling the 3rd
Close, the 4th switch.Rest-set flip-flop, first comparator, the second comparator and monostable flipflop have input synchronization timing function,
Monostable flipflop is realized to coil component secondary winding input conducting and short by controlling each switch conduction or disconnection
Connect.
In such scheme, described first switch and second switch are connected with the 3rd divider resistance, and wherein first switch connects
Connect the high potential point of the 3rd divider resistance and second switch connects the low potential point of the 3rd divider resistance；Described 3rd switch and
The tie point of 4th switch connects the first divider resistance low potential point and the second divider resistance high potential point of connection, protection switch electricity
Road, establish comparator reference voltage.
Brief description of the drawings
Fig. 1 is circuit structure block diagram of the present invention；
Fig. 2 is specific embodiment of the invention circuit diagram；
Fig. 3 is specific embodiment of the invention oscillogram；
Fig. 4 is existing isolated DC-DC power supply；
In figure:1- power inputs, 2- coil components, 3- noises reduce module, 4- Schmidt triggers, 5- delay lists
Member, the buffer registers of 6- first, the buffer registers of 7- second, the transition waveform of 8- the foot section brought noises, the effective waveforms of 9-, 10-
Two comparators, 11- first comparators, 12-RS triggers, 13- phase inverters, 14- monostable flipflops.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
The present invention will be further described below in conjunction with the accompanying drawings：
Fig. 1 is circuit structure block diagram of the present invention, a kind of noise reduction type isolation type high frequency square wave DC-DC power source, including electricity
Source input 1, power input 1 connect the first winding of coil component 2, and the secondary winding of coil component 2 is connected with noise and subtracted
Little module 3, noise reduce module 3 and are connected with Schmidt trigger 4.Described power input 1, including the in parallel first buffering
The buffer register 7 of register 6 and second；Also include delayer 5, delayer 5 is connected with the second buffer register 7.Described line
Enclose device 2, including miniature transformer.Described noise reduces module 3, including the output loop for waveform reconstruction, exports back
Road includes the first switch S1 to be connected with the secondary winding of coil component 1, Schmidt trigger 4, second switch S2, first switch
S1 and coil component (2) secondary winding, second switch S2 are sequentially connected in series, and first switch S1's connects with the non-of second switch S2
Tie point is also connected with the positive input terminal of Schmidt trigger (4), and second switch S2 is connected in series with the non-of first switch S1
Point is also connected with the negative input end of Schmidt trigger (4)；Including the short-circuit loop for truncation noise, short-circuit loop includes and line
Enclose the secondary winding of device 2 the 3rd switch S3 in parallel, the 4th switch S4 to be connected with the 3rd switch S3.Also determine including input feedback
Shi Danyuan, input feedback timing unit include the high level end connection secondary winding of coil component 2 and low level end connection partial pressure electricity
The first comparator 11 of resistance；High level end connects the second of divider resistance and the secondary winding of low level end connection coil component 4
Comparator 10；S ends connect the rest-set flip-flop 12 of the output end of first comparator 11 and the R ends connection output end of the second comparator 10；Also
Including the monostable flipflop 14 being connected with rest-set flip-flop Q ends, monostable flipflop 14 controls first switch by backfeed loop
S1, second switch S2, also switch S3, the 4th switch S4 by connecting inverter controlling the 3rd.Described first switch S1 and
Two switch S2 are connected with divider resistance；Described the 3rd switch S3 and the 4th switch S4 is connected with divider resistance.
Fig. 4 is existing isolated DC-DC micro power, including the switch element being sequentially connected, voltage transformation unit and rectification list
Member；Such usual power supply is used for some unit power supply module in surface-mounted integrated circuit, and its input energy is smaller.Although there is rectification unit
In the presence of, but when voltage magnitude is less than normal, rectification unit can not improve noise jamming of the coil to transition waveform, so that defeated
It is unstable, unreliable to go out waveform.
Embodiment 1
Fig. 3 passes the defeated oscillogram of example for present invention specific implementation, and power input 1 accesses original ripple, passes through coil component 2 one
After secondary winding, there is less electromagnetic noise perturbation in waveform, still, after the output of the secondary winding of coil component 2 is transformed into, mistake
Cross waveform 8 and larger noise disturbance occur, latter half of transition waveform 8 is entirely noise disturbance, and with effective level of waveform 9
Parameter is on the contrary, form similar waveform 8 of the trigonometric function with burr.If reduced without noise, output waveform will appear from greatly
Distortion.First switch S1, second switch S2 are turned on by input feedback timing unit so that effective waveform 9 is exported.
After certain time, first switch S1, second switch S2 disconnect, the 3rd switch S3, the 4th switch S4 conductings, by coil component 2 two
Secondary winding short circuit, the cut-off of the rear portion of transition waveform 8, complete effectively waveform 9 is obtained, after Schmidt's wave filter 4, to output waveform
Rebuild, complete DC-DC transmission.
Beneficial effect of the present invention：Power input, outlet chamber frequency and phase matched are provided, work(is either synchronously or asynchronously transmitted in realization
Energy；Reduce noise of the coil component to transition waveform, block distorted waveform, obtain complete, accurate, reliable DC-DC output waves
Shape.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can readily occur in, all should
It is included within the scope of the present invention.
Claims (4)
1. a kind of noise reduction type isolation type high frequency square wave DC-DC power source, it is characterised in that including power input (1), power supply
The first winding of input (1) connection coil component (2), the secondary winding of coil component (2) are connected with noise and reduce module
(3), noise reduction module (3) is connected with Schmidt trigger (4)；
Described noise reduces module (3), including the output loop for waveform reconstruction, output loop include first switch S1 and
The secondary winding of second switch S2, first switch S1 and coil component (2), second switch S2 are sequentially connected in series, first switch S1's
A little be also connected with the positive input terminals of Schmidt trigger (4) with second switch S2 non-be connected in series, and second switch S2 with
One switch the non-of S1 is connected in series the negative input end for being a little also connected with Schmidt trigger (4)；
Described noise reduces module (3), in addition to the short-circuit loop for truncation noise, and short-circuit loop includes and coil component
(2) secondary winding the 3rd switch S3 in parallel, the 4th switch S4 to be connected with the 3rd switch S3；
Described power input (1), including the first buffer register (6) in parallel and the second buffer register (7)；Also include
Delayer (5), delayer (5) are connected with the second buffer register (7).
A kind of 2. noise reduction type isolation type high frequency square wave DC-DC power source according to claim 1, it is characterised in that institute
The coil component (2) stated, including miniature transformer.
3. a kind of noise reduction type isolation type high frequency square wave DC-DC power source according to claim 1, it is characterised in that also
Including input feedback timing unit, input feedback timing unit includes high level end connection coil component (2) secondary winding and low
Level terminal connects the first comparator (11) of potential point in the first divider resistance；
High level end connects second of the secondary winding of potential point and low level end connection coil component (2) in the second divider resistance
Comparator (10)；
S ends connect the rest-set flip-flop (12) of first comparator (11) output end and R ends connection the second comparator (10) output end；
Also include the monostable flipflop (14) being connected with rest-set flip-flop Q ends, monostable flipflop (14) passes through backfeed loop control
First switch S1 processed, second switch S2, also switch S3, the 4th switch S4 by connecting inverter controlling the 3rd.
A kind of 4. noise reduction type isolation type high frequency square wave DC-DC power source according to claim 1, it is characterised in that institute
The first switch S1 and second switch S2 stated be connected with the 3rd divider resistance, wherein the divider resistance of first switch S1 connections the 3rd
The low potential point of high potential point and the divider resistance of second switch S2 connections the 3rd；The 3rd described switch S3 and the 4th switchs S4's
Tie point connects the first divider resistance low potential point and the second divider resistance high potential point of connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510265532.2A CN104917385B (en) | 2015-05-23 | 2015-05-23 | A kind of noise reduction type isolation type high frequency square wave DC D/C powers |
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| CN201510265532.2A CN104917385B (en) | 2015-05-23 | 2015-05-23 | A kind of noise reduction type isolation type high frequency square wave DC D/C powers |
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| CN104917385A CN104917385A (en) | 2015-09-16 |
| CN104917385B true CN104917385B (en) | 2018-01-12 |
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| CN111257612B (en) * | 2020-01-17 | 2022-02-25 | 南京瑞控电气有限公司 | Isolation circuit for realizing linear pulse electric quantity based on electromagnetic sensor |
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| JPH07322601A (en) * | 1994-05-23 | 1995-12-08 | Hitachi Ltd | Switching regulator |
| CN1241839A (en) * | 1998-07-13 | 2000-01-19 | 郑曙明 | Double phase change inverter circuit |
| JP2006246550A (en) * | 2005-02-28 | 2006-09-14 | Shinano Kenshi Co Ltd | Drive unit of electromagnetic capacity type pump |
| CN101917811A (en) * | 2010-08-02 | 2010-12-15 | 西安新光明电子科技有限公司 | Anti-noise jamming high-side drive circuit |
| CN103269163A (en) * | 2013-06-03 | 2013-08-28 | 矽力杰半导体技术(杭州)有限公司 | Isolated type power circuit and circuit and method for transmitting control signals thereof |
| CN103906331A (en) * | 2012-12-29 | 2014-07-02 | 欧普照明股份有限公司 | Driving circuit of high intensity discharge lamp |
| CN204761291U (en) * | 2015-05-23 | 2015-11-11 | 成都众孚理想科技有限公司 | Noise reduces isolated high frequency square wave DC -DC power of type |
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2015
- 2015-05-23 CN CN201510265532.2A patent/CN104917385B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07322601A (en) * | 1994-05-23 | 1995-12-08 | Hitachi Ltd | Switching regulator |
| CN1241839A (en) * | 1998-07-13 | 2000-01-19 | 郑曙明 | Double phase change inverter circuit |
| JP2006246550A (en) * | 2005-02-28 | 2006-09-14 | Shinano Kenshi Co Ltd | Drive unit of electromagnetic capacity type pump |
| CN101917811A (en) * | 2010-08-02 | 2010-12-15 | 西安新光明电子科技有限公司 | Anti-noise jamming high-side drive circuit |
| CN103906331A (en) * | 2012-12-29 | 2014-07-02 | 欧普照明股份有限公司 | Driving circuit of high intensity discharge lamp |
| CN103269163A (en) * | 2013-06-03 | 2013-08-28 | 矽力杰半导体技术(杭州)有限公司 | Isolated type power circuit and circuit and method for transmitting control signals thereof |
| CN204761291U (en) * | 2015-05-23 | 2015-11-11 | 成都众孚理想科技有限公司 | Noise reduces isolated high frequency square wave DC -DC power of type |
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| CB03 | Change of inventor or designer information |
Inventor after: Wu Xianjun Inventor after: Qiu Nanyang Inventor after: Zou Yongbiao Inventor before: Wang Hai Inventor before: Li Guo |
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| CB03 | Change of inventor or designer information | ||
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Effective date of registration: 20171218 Address after: 518000, Shenzhen, Guangdong, Baoan District Province, south Pu Road, South Po Road, Po ha three slope pit second industrial zone, A2 Applicant after: Shenzhen Flypower Technology Co., Ltd. Address before: 610041 Sichuan province Chengdu Tianfu four Street No. 66 Building 2 floor 8 No. 3 Applicant before: CHENGDU ZHONGFU IDEAL TECHNOLOGY CO., LTD. |
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