CN101079573A - A power interface circuit - Google Patents
A power interface circuit Download PDFInfo
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- CN101079573A CN101079573A CN 200710076287 CN200710076287A CN101079573A CN 101079573 A CN101079573 A CN 101079573A CN 200710076287 CN200710076287 CN 200710076287 CN 200710076287 A CN200710076287 A CN 200710076287A CN 101079573 A CN101079573 A CN 101079573A
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- power interface
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- 238000001914 filtration Methods 0.000 claims abstract description 12
- 230000005764 inhibitory process Effects 0.000 claims description 19
- 230000001052 transient effect Effects 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 10
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 230000001012 protector Effects 0.000 abstract description 3
- 230000002401 inhibitory effect Effects 0.000 abstract 1
- 230000003068 static effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000003750 conditioning effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The invention discloses a power interface circuit, which comprises the following parts: commutator circuit, common mode rejecter circuit, differential mode rejecter circuit, overvoltage protector circuit and filter circuit, wherein the power input end is connected with the input end of common mode rejecter circuit communicated by commutator circuit; the output end of common mode rejecter circuit is connected with the input end of differential mode rejecter circuit after inhibiting the input common mode noise; the output end of differential mode rejecter circuit is connected with two ends of overvoltage protector circuit, which is connected with filter circuit through overvoltage protection to provide power for load after wave filtering. The invention can improve the electromagnetic compatibility of power interface effectively, which makes the interface circuit mate the linear power adapter with low equipment cost and high reliability.
Description
Technical field
The present invention relates to a kind of power interface circuit of communicating terminal product, relate in particular to a kind of power interface circuit that can solve electromagnetic compatibility problem.
Background technology
The electromagnetic compatibility of communication interface (EMC) performance is also increasing to entire product EMC Effect on Performance, and the market access that product E MC performance directly affects product whether, the product that possesses good EMC performance also can bring the market share and profit to enterprise.
In the exploitation of communicating terminal product such as fixed station, often run into+the DC power supply interface of 12V, by the electromagnetic compatibility standard requirement, must pass through the check of electrical fast transient (eft) (EFT) test.When prior art is powered with switch power source adapter, can test, but can't pass through when powering with linear power adapter for reducing cost by EFT.
Figure 1 shows that prior art utilizes Switching Power Supply to provide+the typical power interface circuit of 12V direct current input.
As shown in Figure 1, this power interface circuit interface of prior art mainly is divided into four parts, and first adopts diode D1 rectification; Second portion adopts the L1 differential mode to suppress; Third part adopts transient voltage suppressor (TVS) D2, carries out overvoltage protection, prevents that static, surge from disturbing, and selects for use Transient Suppression Diode to be used as this overvoltage protector usually; The 4th part is a filter network, and electrochemical capacitor and the capacity little ceramic disc capacitor bigger by capacity constitute.
The shortcoming of this power interface of prior art mainly be following some: the first, although the switch power source adapter volume is little, efficient is high, the EMC poor performance is such as conduction anti-interference, spuious inhibition etc.; The linear power supply volume is big slightly, but the EMC performance is good.The second, the Switching Power Supply cost is than linear power supply height, and the 3rd, switching power source device is many, and reliability is more a little bit poorer than linear power supply.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of power interface circuit, can adopt linear power adapter that load is powered satisfying under the condition of electromagnetic compatibility.
To achieve these goals, the invention provides a kind of power interface circuit, circuit comprises: commutator circuit, common mode inhibition electronic circuit, differential mode suppress electronic circuit, overvoltage protection electronic circuit and filtering electronic circuit; Be connected to the input of common mode inhibition electronic circuit after the rectification of power input process commutator circuit; output is connected to the input that differential mode suppresses electronic circuit after the common-mode noise that the common mode inhibition electronic circuit suppresses to import; the output of differential mode inhibition electronic circuit is connected to the two ends of overvoltage protection electronic circuit; be connected to the filtering electronic circuit through behind the overvoltage protection, through providing the power supply input for load after the filtering.
Preferably, described common mode inhibition electronic circuit adopts common mode inductance to realize common mode inhibition.
Preferably, described commutator circuit adopts rectifier diode to realize rectification.
Preferably, described differential mode suppresses the inhibition of electronic circuit employing differential mode inductance realization differential mode.
Preferably, described filtering electronic circuit adopts filter network, and filter network is made of the ceramic disc capacitor of jumbo electrochemical capacitor and low capacity.
Preferably, described overvoltage protection electronic circuit adopts transient voltage suppressor to carry out overvoltage protection.
Preferably, described transient voltage suppressor is a Transient Suppression Diode.
Compared with prior art, power interface circuit according to the present invention has following beneficial effect:
The first, owing to adopted common mode inhibition electronic circuit filtering common mode disturbances effectively;
The second, owing to adopted the common mode inhibition electronic circuit can suppress noise effectively from power line;
The 3rd, adopted transient voltage suppressor, can make this interface not be subjected to interference such as static, lightning surge, differential mode, common mode.
In a word, by the acting in conjunction of each part mentioned above electronic circuit, can improve the Electro Magnetic Compatibility of power interface effectively, thereby improve its reliability.And can make interface circuit adapt to linear power adapter, reduced equipment cost.
Description of drawings
Figure 1 shows that prior art utilizes Switching Power Supply to provide+the typical electrical source interface electrical schematic diagram of 12V direct current input;
Figure 2 shows that the linear power supply that utilizes provided by the invention provides+the power interface electrical schematic diagram of the direct current of 12V input.
Embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and concrete execution mode.
Describe the structure and the operation principle of power interface of the present invention in detail below with reference to Fig. 2.The rectifier diode D1 of the positive termination rectification circuit 100 of linear power supply direct current input realizes right+12V rectification; anode and negative terminal that the anode of the power supply output after the rectification and negative terminal connect common mode inhibition circuit 600 (being L2) input respectively; suppress the common-mode noise on the power supply; the output plus terminal of L2 extremely links to each other with the L1 one that differential mode suppresses circuit 200; another utmost point of L1 and the negative terminal of the power supply D2 that inserts overvoltage crowbar 300 in parallel; by two-way TVS, realize overvoltage protection.
DC input voitage by above rectification, common mode inhibition, differential mode inhibition, overvoltage protection provides clean direct current to press for load 500 through filter network 400 final filtering again, further uses for the subsequent conditioning circuit buck or boost.Wherein, the anode of the positive termination input direct voltage of electrochemical capacitor C1, negative terminal connects the negative terminal of input direct voltage; Ceramic disc capacitor C2 inserts at the two poles of the earth the anode and the negative terminal of DC input voitage respectively.
In foregoing circuit, each several part can adopt following device, but is not limited to this.C1 adopts common electrochemical capacitor (100u/35v), and C2 adopts common ceramic disc capacitor (0.1u 50v); That D1 selects for use is the FM4007B of SEMICONDCTOR company, that D2 selects for use is the P6KE36CA Transient Suppression Diode (VRWM=30.8V of CONCORD, VBR=34.2V-37.8V, Vclamp=49.9V), by above-mentioned explanation, compared with prior art, have the power interface that electric fast transient suppresses according to the present invention and have following advantage:
The first, owing to adopted common mode inductance filtering common mode disturbances effectively;
The second, owing to adopted common mode inductance can suppress noise effectively from power line;
The 3rd, adopted the TVS circuit, can make this interface not be subjected to interference such as static, lightning surge, differential mode, common mode;
The 4th, though increased common mode inductance, cost rises to some extent, considers and can use linear power adapter, and resulting cost descends more, and reliability greatly improves.
Above content be in conjunction with concrete preferred implementation to further describing that the present invention did, can not assert that concrete enforcement of the present invention is confined to these explanations.For the general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (7)
1. a power interface circuit is characterized in that, described circuit comprises: commutator circuit, common mode inhibition electronic circuit, differential mode suppress electronic circuit, overvoltage protection electronic circuit and filtering electronic circuit; Be connected to the input of common mode inhibition electronic circuit after the rectification of power input process commutator circuit; output is connected to the input that differential mode suppresses electronic circuit after the common-mode noise that the common mode inhibition electronic circuit suppresses to import; the output of differential mode inhibition electronic circuit is connected to the two ends of overvoltage protection electronic circuit; be connected to the filtering electronic circuit through behind the overvoltage protection, through providing the power supply input for load after the filtering.
2. power interface circuit according to claim 1 is characterized in that, described common mode inhibition electronic circuit adopts common mode inductance to realize common mode inhibition.
3. power interface circuit according to claim 1 and 2 is characterized in that, described commutator circuit adopts rectifier diode to realize rectification.
4. power interface circuit according to claim 1 and 2 is characterized in that, described differential mode suppresses electronic circuit and adopts differential mode inductance to realize that differential mode suppresses.
5. power interface circuit according to claim 1 and 2 is characterized in that, described filtering electronic circuit adopts filter network, and filter network is made of the ceramic disc capacitor of jumbo electrochemical capacitor and low capacity.
6. power interface circuit according to claim 1 and 2 is characterized in that, described overvoltage protection electronic circuit adopts transient voltage suppressor to carry out overvoltage protection.
7. power interface circuit according to claim 6 is characterized in that, described transient voltage suppressor is a Transient Suppression Diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710076287 CN101079573A (en) | 2007-06-29 | 2007-06-29 | A power interface circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710076287 CN101079573A (en) | 2007-06-29 | 2007-06-29 | A power interface circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101079573A true CN101079573A (en) | 2007-11-28 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710076287 Pending CN101079573A (en) | 2007-06-29 | 2007-06-29 | A power interface circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101079573A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885343A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Wireless gateway device with explosion suppression and electromagnetic shielding function |
| CN104378714A (en) * | 2013-08-14 | 2015-02-25 | 颜至远 | Signal transmission device with micropulse wave absorption function |
| CN104377952B (en) * | 2013-08-14 | 2017-09-15 | 颜至远 | Supply unit with micro pulse wave absorption function |
| CN107238689A (en) * | 2017-07-24 | 2017-10-10 | 重庆环投生态环境监测网络与工程治理有限公司 | Wireless detecting system is used in sewage treatment process |
| CN107863879A (en) * | 2017-12-05 | 2018-03-30 | 珠海格力电器股份有限公司 | Isolated power supply control device and control method |
| CN108712088A (en) * | 2018-06-13 | 2018-10-26 | 深圳市海蕴新能源有限公司 | A kind of switching power circuit inhibiting EFT harassing and wrecking |
| CN110233576A (en) * | 2019-07-11 | 2019-09-13 | 贵州航天林泉电机有限公司苏州分公司 | Vehicle-mounted motor driver auxiliary power unit with arousal function |
| CN110474210A (en) * | 2019-08-27 | 2019-11-19 | 京东方科技集团股份有限公司 | Socket control circuit, socket device and socket control method |
-
2007
- 2007-06-29 CN CN 200710076287 patent/CN101079573A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103885343A (en) * | 2012-12-20 | 2014-06-25 | 中国科学院沈阳自动化研究所 | Wireless gateway device with explosion suppression and electromagnetic shielding function |
| CN104378714A (en) * | 2013-08-14 | 2015-02-25 | 颜至远 | Signal transmission device with micropulse wave absorption function |
| CN104377952B (en) * | 2013-08-14 | 2017-09-15 | 颜至远 | Supply unit with micro pulse wave absorption function |
| CN104378714B (en) * | 2013-08-14 | 2018-03-16 | 颜至远 | Signal transmitting apparatus with micro pulse wave absorption function |
| CN107238689A (en) * | 2017-07-24 | 2017-10-10 | 重庆环投生态环境监测网络与工程治理有限公司 | Wireless detecting system is used in sewage treatment process |
| CN107863879A (en) * | 2017-12-05 | 2018-03-30 | 珠海格力电器股份有限公司 | Isolated power supply control device and control method |
| CN108712088A (en) * | 2018-06-13 | 2018-10-26 | 深圳市海蕴新能源有限公司 | A kind of switching power circuit inhibiting EFT harassing and wrecking |
| CN110233576A (en) * | 2019-07-11 | 2019-09-13 | 贵州航天林泉电机有限公司苏州分公司 | Vehicle-mounted motor driver auxiliary power unit with arousal function |
| CN110474210A (en) * | 2019-08-27 | 2019-11-19 | 京东方科技集团股份有限公司 | Socket control circuit, socket device and socket control method |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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