CN105048433A - Surge protection design method for DC-DC power supply - Google Patents
Surge protection design method for DC-DC power supply Download PDFInfo
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- CN105048433A CN105048433A CN201510373803.6A CN201510373803A CN105048433A CN 105048433 A CN105048433 A CN 105048433A CN 201510373803 A CN201510373803 A CN 201510373803A CN 105048433 A CN105048433 A CN 105048433A
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- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000001052 transient effect Effects 0.000 claims abstract description 31
- 230000001629 suppression Effects 0.000 claims abstract description 27
- 238000005516 engineering process Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004377 microelectronic Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
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Abstract
The invention discloses a surge protection design method for a DC-DC power supply. The power supply surge protection design method uses three surge protection components to realize, i.e., a gas discharge tube, a piezoresistor and a transient suppression diode. A primary protection circuit formed by the piezoresistor and a secondary protection circuit formed by the transient suppression diode are arranged between a power interface and a DC-DC power supply, and a hollow inductor is arranged between the primary protection circuit and the secondary protection circuit; the primary protection circuit uses the single piezoresistor to perform differential-mode surge protection; one end of the gas discharge tube is connected with the piezoresistor in series, and the other end is connected to the ground through an enclosure, thereby performing common-mode surge protection; and the secondary protection circuit uses the single transient suppression diode to reduce surge residual voltage of the primary protection circuit. The surge protection design method for the DC-DC power supply has the characteristics of being reasonable in design, being simple in structure and being easy to machine, and the method adopts multilevel protection, thereby effectively reducing or eliminating damage of surge energy to sensitive components in a digital system.
Description
Technical field
The present invention relates to power surge guard technology field, specifically a kind of for DC-DC power source carrying out surge protection method for designing.
Background technology
Along with Modern Digital System chips integration degree is more and more higher, what the kernel supply power voltage of chip had only has 1.25V even lower, voltage a little a little fluctuates and chip activity just may be caused abnormal, and the voltage transient that the rate of climb is fast, the duration is short or surge voltage can be higher, far exceed the voltage withstand capability of chip integrated circuit, once occur that voltage transient or surge will cause burning of microelectronic chip or puncture in a device, cause the damage of electronic equipment.Equally, due to the reason of inductive load existence in same supply network, equipment plug all may cause the voltage transient at whole supply network, will go to bear this voltage transient at other equipment of same supply network, this pulse voltage of disinthibiting if this equipment DC-DC power source does not take appropriate measures, will cause electronic device works extremely even to be damaged.
Disclosed patent application document: number of patent application is " CN201020622816.5 ", name is called " DC power supply surge protective circuit ", this document disclose " a kind of DC power supply surge protective circuit; comprise one-level protection circuit, two stages of circuit and alarm control circuit; described one-level protection circuit adopts piezo-resistance, Thermal Cutoffs and ceramic gas discharge tube tandem compound to form; the common end grounding of described ceramic gas discharge tube, and two ends are respectively connected in series a pair piezo-resistance and Thermal Cutoffs in addition; Described two stages of circuit adopts Transient Suppression Diode and two pairs of piezo-resistances and Thermal Cutoffs to compose in parallel, and described two pairs of piezo-resistances and Thermal Cutoffs are staggeredly placed and are in series, the common end grounding of series connection; Described alarm control circuit comprises the two kinds of signal circuits be made up of respectively the light-emitting diode of diode, the light-emitting diode showing green and display danger signal, Transient Suppression Diode, common resistance and DC power supply.The utility model increases the resistance to discharge capacity of product, can bear stronger lightning current, also has warning prompt function, and fail safe improves ".
Number of patent application is " CN201020550805.0 ", name is called " low-voltage DC power port protector ", this document disclose " a kind of low-voltage DC power port protector; power input connects rectifier bridge, the positive source output of rectifier bridge and power cathode output connect positive terminal and the negative pole end of low-tension supply output after being connected in series 3 self-recoverage insurances respectively; After the positive source output of rectifier bridge first order self-recoverage insurance rear end and rectifier bridge power cathode output after first order self-recoverage to insure between rear end and to connect gas discharge tube; After the positive source output of rectifier bridge second level self-recoverage insurance rear end and rectifier bridge power cathode output after second level self-recoverage to insure between rear end and to connect piezo-resistance; After the positive source output of rectifier bridge third level self-recoverage insurance rear end and rectifier bridge power cathode output after third level self-recoverage to insure between rear end and to connect Transient Suppression Diode.The utility model uses three grades of surges, burst of pulses Restrain measurement, combines the insurance of many group self-recoverage simultaneously, effectively can prevent voltage wrong, the electrical appliance caused that is struck by lightning damages, also have extraordinary effect simultaneously to the suppression of fast-pulse group ".
All there is circuit complexity in above-mentioned open file, the problem that setup cost is too high.In addition, above-mentioned open file circuit element connect, technical field with for solve technical problem also different from the technology of the present invention.
Summary of the invention
Technical assignment of the present invention is to provide a kind of for DC-DC power source carrying out surge protection method for designing.
Technical assignment of the present invention realizes in the following manner, this power surge protection design method adopts gas discharge tube, piezo-resistance, Transient Suppression Diode three kinds of carrying out surge protection components and parts to realize, between power interface and DC-DC power source, be provided with the one-level protection circuit be made up of piezo-resistance and the two stages of circuit be made up of Transient Suppression Diode, between one-level protection circuit and two stages of circuit, air core inductor is set; One-level protection circuit adopts single piezo-resistance to carry out differential mode surge protection; Connect with piezo-resistance in gas discharge tube one end, the other end, by chassics earth, carries out common mode carrying out surge protection; Two stages of circuit adopts single Transient Suppression Diode to reduce the surge residual voltage of one-level protection circuit.
Single piezo-resistance inline fuse in described one-level protection circuit.
Single Transient Suppression Diode inline fuse in described two stages of circuit.
Compared to the prior art one of the present invention is used for DC-DC power source carrying out surge protection method for designing, have reasonable in design, structure simple, be easy to the features such as processing, the method adopts multistage protection, effectively reduces or eliminate the damage of surge energy to sensitive components in digital system.
Accompanying drawing explanation
Accompanying drawing 1 is that a kind of element for DC-DC power source carrying out surge protection method for designing connects schematic block diagram.
Embodiment
Embodiment 1:
As shown in Figure 1, this power surge protection design method adopts gas discharge tube G1, piezo-resistance RV1, Transient Suppression Diode T1 tri-kinds of carrying out surge protection components and parts realize, between power interface and DC-DC power source, be provided with the one-level protection circuit be made up of piezo-resistance RV1 and the two stages of circuit be made up of Transient Suppression Diode T1, air core inductor L1 is set between one-level protection circuit and two stages of circuit; One-level protection circuit adopts single piezo-resistance RV1 to carry out differential mode surge protection; Gas discharge tube G1 connects with piezo-resistance RV1 one end, and the other end, by chassics earth, carries out common mode carrying out surge protection; Two stages of circuit adopts single Transient Suppression Diode T1 to reduce the surge residual voltage of one-level protection circuit.
Embodiment 2:
As shown in Figure 1, this power surge protection design method adopts gas discharge tube G1, piezo-resistance RV1, Transient Suppression Diode T1 tri-kinds of carrying out surge protection components and parts realize, between power interface and DC-DC power source, be provided with the one-level protection circuit be made up of piezo-resistance RV1 and the two stages of circuit be made up of Transient Suppression Diode T1, air core inductor L1 is set between one-level protection circuit and two stages of circuit; One-level protection circuit adopts single piezo-resistance RV1 to carry out differential mode surge protection, piezo-resistance RV1 inline fuse F1; Gas discharge tube G1 connects with piezo-resistance RV1 one end, and the other end, by chassics earth, carries out common mode carrying out surge protection; Two stages of circuit adopts single Transient Suppression Diode T1 to reduce the surge residual voltage of one-level protection circuit, Transient Suppression Diode T1 inline fuse F2.
With this, the transition that can bear according to precision components most in circuit or the ability of surge voltage, determine which kind of teaming method protection circuit adopts, consider common mode surge voltage and differential mode surge voltage simultaneously; The intensity of external transition or surge voltage may be born simultaneously according to applied environment digital system, comprehensively determine common mode carrying out surge protection and differential mode surge protection.Gas discharge tube G1, piezo-resistance RV1, these three kinds of carrying out surge protection components and parts of Transient Suppression Diode T1, be followed successively by according to through-current capacity size: gas discharge tube G1> piezo-resistance RV1> Transient Suppression Diode T1; According to being followed successively by the reaction speed of voltage transient or surge: Transient Suppression Diode T1> piezo-resistance RV1> gas discharge tube G1.Single piezo-resistance RV1 carries out differential mode surge protection, for reducing or the surge interference eliminated in current supply circuit; Gas discharge tube G1 carries out common mode carrying out surge protection, for reducing or eliminate supply line with the surge energy between casing; Transient Suppression Diode T1 is two-way for anti-reverse, and the surge residual voltage utilizing the fast reaction of Transient Suppression Diode T1, flexibly voltage clamping ability and extremely low parasitic capacitance the first order to be protected is reduced to the level that late-class circuit can bear.
By embodiment above, described those skilled in the art can be easy to realize the present invention.But should be appreciated that the present invention is not limited to above-mentioned several embodiments.On the basis of disclosed execution mode, described those skilled in the art can the different technical characteristic of combination in any, thus realizes different technical schemes.
Claims (3)
1. one kind for DC-DC power source carrying out surge protection method for designing, it is characterized in that, this power surge protection design method adopts gas discharge tube, piezo-resistance, Transient Suppression Diode three kinds of carrying out surge protection components and parts to realize, between power interface and DC-DC power source, be provided with the one-level protection circuit be made up of piezo-resistance and the two stages of circuit be made up of Transient Suppression Diode, between one-level protection circuit and two stages of circuit, air core inductor is set; One-level protection circuit adopts single piezo-resistance to carry out differential mode surge protection; Connect with piezo-resistance in gas discharge tube one end, the other end, by chassics earth, carries out common mode carrying out surge protection; Two stages of circuit adopts single Transient Suppression Diode to reduce the surge residual voltage of one-level protection circuit.
2. one according to claim 1 is used for DC-DC power source carrying out surge protection method for designing, it is characterized in that, the single piezo-resistance inline fuse in described one-level protection circuit.
3. one according to claim 1 is used for DC-DC power source carrying out surge protection method for designing, it is characterized in that, the single Transient Suppression Diode inline fuse in described two stages of circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373803.6A CN105048433A (en) | 2015-07-01 | 2015-07-01 | Surge protection design method for DC-DC power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510373803.6A CN105048433A (en) | 2015-07-01 | 2015-07-01 | Surge protection design method for DC-DC power supply |
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| CN105048433A true CN105048433A (en) | 2015-11-11 |
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| CN201510373803.6A Pending CN105048433A (en) | 2015-07-01 | 2015-07-01 | Surge protection design method for DC-DC power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572453A (en) * | 2016-01-08 | 2016-05-11 | 珠海许继电气有限公司 | Voltage acquisition electronic sensor apparatus |
| CN112952785A (en) * | 2021-01-27 | 2021-06-11 | 杭州爱科科技股份有限公司 | Surge protection circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601488U (en) * | 2009-12-07 | 2010-10-06 | 北京欧地安科技股份有限公司 | High energy electromagnetic pulse protection circuit of direct current power source |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| CN103036224A (en) * | 2012-12-27 | 2013-04-10 | 徐大鹏 | Low residual voltage lightning protection device for power supply |
| CN202917967U (en) * | 2012-07-26 | 2013-05-01 | 京信通信技术(广州)有限公司 | Lightning protection device of direct-current power supply |
| CN104269835A (en) * | 2014-09-19 | 2015-01-07 | 华为技术有限公司 | Protection device, electronic equipment and power supply |
-
2015
- 2015-07-01 CN CN201510373803.6A patent/CN105048433A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201601488U (en) * | 2009-12-07 | 2010-10-06 | 北京欧地安科技股份有限公司 | High energy electromagnetic pulse protection circuit of direct current power source |
| CN201974448U (en) * | 2010-12-10 | 2011-09-14 | 广东雅达电子股份有限公司 | Surge-prevention intelligent electrical measuring instrument |
| CN202917967U (en) * | 2012-07-26 | 2013-05-01 | 京信通信技术(广州)有限公司 | Lightning protection device of direct-current power supply |
| CN103036224A (en) * | 2012-12-27 | 2013-04-10 | 徐大鹏 | Low residual voltage lightning protection device for power supply |
| CN104269835A (en) * | 2014-09-19 | 2015-01-07 | 华为技术有限公司 | Protection device, electronic equipment and power supply |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105572453A (en) * | 2016-01-08 | 2016-05-11 | 珠海许继电气有限公司 | Voltage acquisition electronic sensor apparatus |
| CN112952785A (en) * | 2021-01-27 | 2021-06-11 | 杭州爱科科技股份有限公司 | Surge protection circuit |
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