CN201490685U - Multifunction power protection circuit - Google Patents
Multifunction power protection circuit Download PDFInfo
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- CN201490685U CN201490685U CN200920134227XU CN200920134227U CN201490685U CN 201490685 U CN201490685 U CN 201490685U CN 200920134227X U CN200920134227X U CN 200920134227XU CN 200920134227 U CN200920134227 U CN 200920134227U CN 201490685 U CN201490685 U CN 201490685U
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Abstract
The utility model relates to a multifunction power protection circuit, comprising a power input polar indication circuit, a first electric capacity, an overvoltage protection circuit and an over-current and under-voltage protection circuit which are sequentially connected in parallel. The multifunction power protection circuit is simple and uses common apparatus, and the cost is low.
Description
Technical field
The utility model relates to the DC power supply circuit field, particularly a kind of multifunctional power protective circuit.
Background technology
Along with portable or handheld terminal electronic product (comprise communication product; digital product etc.) a large amount of popularizing; the kind of power supply adaptor constantly increases; the standard of the positive-negative polarity neither one standard of power supply output; the voltage range of power supply output is also varied; user's electronic product and power supply adaptor kind at one's side is more and more; the phenomenon of mutual misplug or portable power supply adapter output abnormality takes place probably; cause power supply adaptor damage or electronic product to burn; serious meeting causes fire; this just needs to possess power protecting circuit in the electronic product; to avoid under unexpected situation, producing unnecessary loss, protect our power supply adaptor and electronic product.
Existing power protecting circuit all adopts chip to realize basically, function singleness, and also cost is also higher.
The utility model content
Technical problem to be solved in the utility model is, a kind of multifunctional power protective circuit is provided, and the utility model circuit is simple, and cost is low, and function is more relatively.
The utility model discloses a kind of multifunctional power protective circuit, described circuit comprises power supply input polarity indicating circuit, first electric capacity, overvoltage crowbar and overcurrent and the under-voltage protecting circuit that is connected in parallel successively.
Described power supply input polarity indicating circuit comprises first resistance, second resistance, dichromatic LED, and described first resistance, one end connects positive source, and the other end is connected with the negative pole of described dichromatic LED; Described second resistance, one end is connected other end ground connection with the negative pole of described dichromatic LED; A positive pole of described dichromatic LED is connected another plus earth with positive source.
One end of described first electric capacity is connected with positive source, other end ground connection.
Described overvoltage crowbar comprises: the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first triode, second triode, the 3rd triode, voltage stabilizing didoe and second electric capacity; Wherein, described the 3rd resistance one end is connected with the base stage of described first triode, and the other end is connected with the emitter of described second triode; Described the 4th resistance one end is connected other end ground connection with the base stage of described first triode; The collector electrode of described first triode is connected with the emitter of described second triode through described the 5th resistance, and emitter is through described voltage stabilizing didoe ground connection; The base stage of described the 3rd triode links to each other with the collector electrode of first triode through described the 7th resistance, simultaneously through described second capacity earth, and the direct ground connection of emitter, collector electrode is connected with the base stage of described second triode through described the 8th resistance; One end of described the 6th resistance is connected with the emitter of described second triode, and the other end is connected with the collector electrode of described the 3rd triode; The emitter of described second triode is connected with positive source.
Described overcurrent and under-voltage protecting circuit comprise: the 4th triode, the 5th field effect transistor, the 6th triode, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, diode and the 3rd electric capacity, wherein, the emitter of described the 4th triode is connected with the collector electrode of described second triode, base stage is connected with the source electrode of described the 5th field effect transistor through described the 11 resistance, and collector electrode connects the emitter of described the 6th triode; The grid of described the 5th field effect transistor is connected with the collector electrode of described the 6th triode, and source electrode is connected with the collector electrode of described second triode through described the 9th resistance; The base stage of described the 6th triode is connected with the drain electrode of described the 5th field effect transistor through described the 13 resistance, and emitter is connected with described the 15 resistance one end; The other end of described the 15 resistance is connected with the positive pole of described diode; The minus earth of described diode; Described the tenth resistance is connected between the source electrode and grid of described the 5th field effect transistor; Described the 12 resistance one end is connected other end ground connection with the base stage of described the 4th triode; Described the 14 resistance one end is connected other end ground connection with the base stage of described the 6th triode; Described the 3rd electric capacity one end is connected other end ground connection with the collector electrode of described the 6th triode; The drain electrode of described the 5th field effect transistor connects load.
Described the 3rd resistance, the 4th resistance, the 11 resistance, the 12 resistance are the resistance of ± 1% precision.
Described the 9th resistance is the power resistor of ± 1% precision.
Described second triode is a low pressure drop positive-negative-positive triode.
Described the 5th field effect transistor is power P NMOS N-channel MOS N field effect transistor (a PMOS pipe).
Need to prove that in the utility model, " first, second ... " only is in order to describe needs, is not the restriction of the primary and secondary position etc. to device.
The utility model circuit is simple, use commonplace components, cost is lower, has overvoltage protection, overcurrent protection, functions such as reversed polarity input protection, load end battery reverse connecting protection, under the situation of overvoltage protection, circuit itself does not have the heating phenomenon, can not exert an influence to surrounding environment; The access power consumption of itself is less, can not influence the operate as normal of the terminal equipment at place; Support independent charge protection to Ni-MH battery, lead accumulator; And the power supply adaptor to the load capacity deficiency has the certain protection function; The utlity model has practical value, in actual applications, the user can carry out simple device parameters adjustment according to the real needs of different terminal equipment, promptly can be its terminal equipment power protection is provided.
Description of drawings
Fig. 1 is the schematic diagram of circuit described in the utility model;
Fig. 2 is a power supply input polarity indicating circuit schematic diagram among Fig. 1;
Fig. 3 is an overvoltage crowbar schematic diagram among Fig. 1;
Fig. 4 is overcurrent and a under-voltage protecting circuit schematic diagram among Fig. 1.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment, the utility model is described in further detail.
As shown in Figure 1; it is the complete schematic digram of circuit described in the utility model; between load LOAD and power supply DC INPUT; comprise the power supply input polarity indicating circuit, capacitor C 01, overvoltage crowbar and overcurrent and the under-voltage protecting circuit that are connected in parallel successively; power supply input polarity indicating circuit, overvoltage crowbar and overcurrent and under-voltage protecting circuit in the utility model all can use separately, and the user can be according to the demand use partial circuit wherein of oneself.Wherein,
Power supply input polarity indicating circuit, as shown in Figure 2, comprise resistance R 01, R02, dichromatic LED LED01, in the present embodiment, LED01 is the red and green color light-emitting diode, and wherein, the positive pole of the green LED among resistance R 01 1 ends and the dichromatic LED LED01 is connected, as the input of this practical information, the other end is connected with the negative pole of dichromatic LED LED01; Resistance R 02 1 ends are connected other end ground connection with the negative pole of dichromatic LED LED01; The plus earth of the red LED among the dichromatic LED LED01;
LED01 is the red and green color light-emitting diode, and when the input polarity of power supply was correct, green indicating lamp was lighted; When the input error-polarity connection of power supply, red led is lighted, in order to the prompting user.
With reference to figure 1, as can be seen, when the polarity of power supply input is opposite, the positive pole of power supply passes through resistance R 08 again via the collector electrode of parasitic diode on load, the field effect transistor VT05 and resistance R 09 to triode VT02, and R06 is to the ground end of reversal connection, because the resistance value of R06 and load is generally bigger, about more than 10 kilo-ohms, so the electric current that forms in the loop very little (being about several milliamperes) can not exert an influence to load.
The user can utilize the utility model circuit separately Ni-MH battery, lead accumulator to be charged; when rechargeable battery or load itself from charged pool during because of the carelessness reversal connection; because the drain potential of VT05 is very low; cause VT05 to end; cut off the path of external power source and rechargeable battery or load, thereby played the function of load end battery reverse connecting protection.
One end of capacitor C 01 with being connected with LED 01 an anodal end that links to each other of resistance R 01, promptly is connected other end ground connection with positive source; Capacitor C 01 is in order to absorb the instantaneous surge current of adapter input.
Overvoltage crowbar as shown in Figure 3, comprises resistance R 03, R04, R05, R06, R07, R08, triode VT01, VT02, VT03, voltage stabilizing didoe ZD01 and capacitor C 02; Wherein, resistance R 03 1 ends are connected with the base stage of triode VT01, and the other end is connected with the emitter of triode VT02; Described resistance R 04 1 ends are connected other end ground connection with the base stage of triode VT01; The collector electrode of triode VT01 is connected through the emitter of resistance R 05 with triode VT02, and emitter is through voltage stabilizing didoe ZD01 ground connection; The base stage of triode VT03 is through capacitor C 02 ground connection, the direct ground connection of emitter, and collector electrode is connected through the base stage of resistance R 08 with triode VT02; One end of resistance R 06 is connected with the emitter of triode VT02, and the other end is connected with the collector electrode of triode VT03; Resistance R 07 1 ends are connected with the collector electrode of triode VT01, and the other end is connected with the base stage of triode VT03; The emitter of triode VT02 also connects with the end that is connected with resistance R 01 of capacitor C 01;
Among Fig. 3, resistance R 03, R04 forms the sample circuit of power input voltage, specified input voltage value during according to the load operate as normal that connects, select the resistance value of resistance R 03 and R04, make D is ordered among the figure voltage a little less than the reverse breakdown voltage sum of PN junction voltage and the voltage stabilizing didoe ZD01 of triode VT01, thereby make triode VT01 be in cut-off state.
When the input voltage of the adapter that connects when circuit described in the utility model is lower than the protection voltage that load sets, the dividing potential drop of resistance R 03 and R04 can not make voltage stabilizing didoe ZD01 reverse breakdown by the BE knot of triode VT01, so VT01 ends, the VT03 conducting, the power supply of load is connected in the VT02 conducting; When the input voltage of adapter was higher than set protection voltage, the dividing potential drop of resistance R 03 and R04 improved, and makes the ZD01 reverse breakdown and conducting, the VT01 conducting, and VT03 ends, and VT02 ends, and cuts off the power supply of load; Play the purpose of overvoltage protection.
In the moment of power on circuitry, on the one hand, electric current makes the VT01 conducting by R03, VT01 and ZD01; Electric current makes the VT03 conducting by R05 and R07 on the other hand, and VT02 is conducting, if the voltage of input surpasses the protection value; power supply will produce rush of current to load, therefore, has increased capacitor C 02 in the base stage of VT03; guaranteed that VT03 ends in the moment of VT01 conducting, played the effect of buffering.
Overcurrent and under-voltage protecting circuit, as shown in Figure 4, comprise triode VT04, VT06, field effect transistor VT05, resistance R 09, R010, R011, R012, R013, R014, R015, diode D01 and capacitor C 03, wherein, the emitter of described triode VT04 is connected through the source electrode of resistance R 09 with field effect transistor VT05, and base stage is connected through the source electrode of resistance R 011 with field effect transistor VT05, and collector electrode connects the emitter of triode VT06; The grid of field effect transistor VT05 is connected with the collector electrode of triode VT06; The base stage of triode VT06 is connected through the drain electrode of resistance R 013 with field effect transistor VT05, and emitter is connected with resistance R 015 1 ends; The other end of resistance R 015 is connected with the positive pole of diode D01; The minus earth of diode D01; Resistance R 010 is connected between the source electrode and grid of field effect transistor VT05; Resistance R 012 1 ends are connected other end ground connection with the base stage of triode VT04; Resistance R 014 1 ends are connected other end ground connection with the base stage of triode VT06; Described capacitor C 03 1 ends are connected other end ground connection with the collector electrode of triode VT06; The collector electrode of triode VT02 among the emitter of triode VT04 and Fig. 2 is connected; The drain electrode of field effect transistor VT05 is connected with load LOAD.
In the present embodiment, resistance R 03, R04 adopt the resistance of ± 1% precision; Triode VT02 adopts the positive-negative-positive triode of low pressure drop.
Among Fig. 4, resistance R 013, R014 forms the sample circuit of electric power output voltage, according to the magnitude of voltage of under-voltage protection, selects the resistance value of R013 and R014, the operating state of control VT06.At output voltage just often, the VT06 conducting, the power supply of load is connected in the VT05 conducting; When output voltage was lower than the under-voltage protection point of setting, VT06 ended, and VT05 ends, and cut off the power supply of load;
R09 is a current sampling resistor, produces sampling voltage with R011, R012 divider resistance, the operating state of control VT04, and the electric current on flowing through R09 is during less than the protective current set, and the pressure drop on the R09 is less, and deficiency is so that the VT04 conducting; Electric current on flowing through R09 is during greater than the protective current set, and the pressure drop on the R09 increases, and makes the VT04 saturation conduction, makes the BE knot of VT06 partially anti-and end after the VT04 conducting, thereby VT05 is ended, and cuts off the electricity supply and plays the purpose of overcurrent protection.
Capacitor C 03 is a soft start capacitor, has the function of locking again; In the beginning of adapter energising, electric current is by R09, and R010 charges to C03, VT05 moment conducting, and after the VT05 conducting, the sample circuit through R013 and R014 composition makes the VT06 conducting again, and VT05 obtains continuing conducting.When under-voltage or overcurrent take place; VT05 by cut off the electricity supply and load between path; even fault disappeared afterwards; load circuit can not normal power supply; again Switching Power Supply (waiting C03 to go up the low back of voltage drop) just can make the circuit operate as normal; the function of locking that Here it is avoids the energising back not get rid of fully because of load faulty, and the vibration of current foldback circuit enlarges the fault coverage of equipment.
Diode D01 plays a protective role to VT06 when load end reversal connection battery.
In the present embodiment, R011 and R012 adopt the resistance of ± 1% precision because the electric current that passes through on the R09 is bigger, so resistance R 09 employing resistance value as far as possible little ± power resistor of 1% precision; Triode VT05 adopts power tube PMOS.
In the utility model; for the sample resistance R03 and the R04 of overvoltage and under-voltage protection, the selection of R013 and R014 resistance is according to the requirement of different terminals product to specified input voltage range; can can draw their resistance ratio by simple calculating, no longer illustrate here.
For the sample resistance R011 of overcurrent protection and the selection of R012 resistance, need to consider the current value of input power source voltage value and overcurrent protection, be exemplified below:
If: power source voltage is 5V, and the maximum current of the operate as normal of load is 1.0A, R09=0.15 Europe, the electric current in the load starts protection greater than 2.0A the time, then in Fig. 4:
A point voltage: VA=5.0V, B point voltage: VB=5.0-0.15*1.2 (V)=4.82V, the electric current surplus is 1.2A, make VT04 be in critical cut-off state, C point voltage: VC=4.3V,
Then: R012*4.82V/ (R011+R012)=4.3V calculates:
R011∶R012＝1∶8.27
So the resistance of R011 and R012 may be selected to be: R011=470 Europe, R012=3.9 kilo-ohm.
It below only is preferred embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the disclosed technical scope of the utility model; carry out local variation or replacement, all should be encompassed within the protection range of the present utility model.
Claims (9)
1. a multifunctional power protective circuit is characterized in that, described circuit comprises power supply input polarity indicating circuit, first electric capacity, overvoltage crowbar and overcurrent and the under-voltage protecting circuit that is connected in parallel successively.
2. multifunctional power protective circuit as claimed in claim 1, it is characterized in that, described power supply input polarity indicating circuit comprises first resistance, second resistance, dichromatic LED, and described first resistance, one end connects positive source, and the other end is connected with the negative pole of described dichromatic LED; Described second resistance, one end is connected other end ground connection with the negative pole of described dichromatic LED; A positive pole of described dichromatic LED is connected another plus earth with positive source.
3. multifunctional power protective circuit as claimed in claim 1 or 2 is characterized in that, an end of described first electric capacity is connected with positive source, other end ground connection.
4. multifunctional power protective circuit as claimed in claim 1, it is characterized in that described overvoltage crowbar comprises: the 3rd resistance, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first triode, second triode, the 3rd triode, voltage stabilizing didoe and second electric capacity; Wherein, described the 3rd resistance one end is connected with the base stage of described first triode, and the other end is connected with the emitter of described second triode; Described the 4th resistance one end is connected other end ground connection with the base stage of described first triode; The collector electrode of described first triode is connected with the emitter of described second triode through described the 5th resistance, and emitter is through described voltage stabilizing didoe ground connection; The base stage of described the 3rd triode links to each other with the collector electrode of first triode through described the 7th resistance, simultaneously through described second capacity earth, and the direct ground connection of emitter, collector electrode is connected with the base stage of described second triode through described the 8th resistance; One end of described the 6th resistance is connected with the emitter of described second triode, and the other end is connected with the collector electrode of described the 3rd triode; The emitter of described second triode is connected with positive source.
5. as claim 1 or 4 described multifunctional power protective circuits, it is characterized in that, described overcurrent and under-voltage protecting circuit comprise: the 4th triode, the 5th field effect transistor, the 6th triode, the 9th resistance, the tenth resistance, the 11 resistance, the 12 resistance, the 13 resistance, the 14 resistance, the 15 resistance, diode and the 3rd electric capacity, wherein, the emitter of described the 4th triode is connected with the collector electrode of described second triode, base stage is connected with the source electrode of described the 5th field effect transistor through described the 11 resistance, and collector electrode connects the emitter of described the 6th triode; The grid of described the 5th field effect transistor is connected with the collector electrode of described the 6th triode, and source electrode is connected with the collector electrode of described second triode through described the 9th resistance; The base stage of described the 6th triode is connected with the drain electrode of described the 5th field effect transistor through described the 13 resistance, and emitter is connected with described the 15 resistance one end; The other end of described the 15 resistance is connected with the positive pole of described diode; The minus earth of described diode; Described the tenth resistance is connected between the source electrode and grid of described the 5th field effect transistor; Described the 12 resistance one end is connected other end ground connection with the base stage of described the 4th triode; Described the 14 resistance one end is connected other end ground connection with the base stage of described the 6th triode; Described the 3rd electric capacity one end is connected other end ground connection with the collector electrode of described the 6th triode; The drain electrode of described the 5th field effect transistor connects load.
6. multifunctional power protective circuit as claimed in claim 5 is characterized in that, described the 3rd resistance, the 4th resistance, the 11 resistance, the 12 resistance are the resistance of ± 1% precision.
7. multifunctional power protective circuit as claimed in claim 5 is characterized in that, described the 9th resistance is the power resistor of ± 1% precision.
8. multifunctional power protective circuit as claimed in claim 4 is characterized in that, described second triode is a low pressure drop positive-negative-positive triode.
9. multifunctional power protective circuit as claimed in claim 5 is characterized in that, described the 5th field effect transistor is a power P NMOS N-channel MOS N field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920134227XU CN201490685U (en) | 2009-07-24 | 2009-07-24 | Multifunction power protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920134227XU CN201490685U (en) | 2009-07-24 | 2009-07-24 | Multifunction power protection circuit |
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| CN200920134227XU Expired - Fee Related CN201490685U (en) | 2009-07-24 | 2009-07-24 | Multifunction power protection circuit |
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| CN103280765A (en) * | 2013-06-05 | 2013-09-04 | 青岛歌尔声学科技有限公司 | Overvoltage protection circuit |
| CN103490388A (en) * | 2013-10-10 | 2014-01-01 | 济南沃尔电子有限公司 | Over-voltage and under-voltage protection circuit |
| CN103715659A (en) * | 2013-12-18 | 2014-04-09 | 青岛海信网络科技股份有限公司 | Vehicle-mounted power supply protective circuit |
| CN103812088A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Electricity-taking protection device |
| CN104143906A (en) * | 2014-07-28 | 2014-11-12 | 武汉中元通信股份有限公司 | Medium-power power source module for mobile wireless communication device |
| CN104242249A (en) * | 2014-09-17 | 2014-12-24 | 广州金升阳科技有限公司 | Protective circuit of switching power supply |
| CN104600673A (en) * | 2013-10-30 | 2015-05-06 | 深圳市海洋王照明工程有限公司 | Under-voltage protection circuit and lamp |
| CN104953539A (en) * | 2014-03-26 | 2015-09-30 | 国家电网公司 | Low-voltage-side overvoltage protection circuit |
| CN105056366A (en) * | 2015-08-08 | 2015-11-18 | 潘秀兰 | Brain wave resonator |
| CN105934021A (en) * | 2016-05-03 | 2016-09-07 | 电子科技大学 | Overvoltage adjusting circuit for linear constant-current driving LED |
| CN106229954A (en) * | 2016-09-19 | 2016-12-14 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN106953297A (en) * | 2017-05-26 | 2017-07-14 | 青岛东软载波科技股份有限公司 | A kind of protection circuit |
| CN108199566A (en) * | 2017-12-26 | 2018-06-22 | 成都鼎信致远科技有限公司 | Direct current window type work high temperature pulse power supply with DC over-voltage protection |
| CN108494247A (en) * | 2018-04-28 | 2018-09-04 | 惠州市德赛西威汽车电子股份有限公司 | A kind of power circuit for taking into account 180V high voltage protectives and 5V operating on low voltage |
| CN109936287A (en) * | 2017-12-16 | 2019-06-25 | 厦门新页科技有限公司 | A kind of voltage regulator circuit with input undervoltage, overvoltage protection |
| CN110739660A (en) * | 2019-09-23 | 2020-01-31 | 上海空间电源研究所 | protection circuit for satellite load |
| CN113541098A (en) * | 2021-09-14 | 2021-10-22 | 杭州博雅鸿图视频技术有限公司 | Power supply protection circuit and antenna device |
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2009
- 2009-07-24 CN CN200920134227XU patent/CN201490685U/en not_active Expired - Fee Related
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| CN103812088A (en) * | 2012-11-12 | 2014-05-21 | 苏州工业园区新宏博通讯科技有限公司 | Electricity-taking protection device |
| CN103280765A (en) * | 2013-06-05 | 2013-09-04 | 青岛歌尔声学科技有限公司 | Overvoltage protection circuit |
| CN103490388A (en) * | 2013-10-10 | 2014-01-01 | 济南沃尔电子有限公司 | Over-voltage and under-voltage protection circuit |
| CN103490388B (en) * | 2013-10-10 | 2016-01-13 | 济南沃尔电子有限公司 | A kind of overvoltage and under-voltage protecting circuit |
| CN104600673A (en) * | 2013-10-30 | 2015-05-06 | 深圳市海洋王照明工程有限公司 | Under-voltage protection circuit and lamp |
| CN103715659B (en) * | 2013-12-18 | 2017-01-25 | 青岛海信网络科技股份有限公司 | Vehicle-mounted power supply protective circuit |
| CN103715659A (en) * | 2013-12-18 | 2014-04-09 | 青岛海信网络科技股份有限公司 | Vehicle-mounted power supply protective circuit |
| CN104953539A (en) * | 2014-03-26 | 2015-09-30 | 国家电网公司 | Low-voltage-side overvoltage protection circuit |
| CN104143906A (en) * | 2014-07-28 | 2014-11-12 | 武汉中元通信股份有限公司 | Medium-power power source module for mobile wireless communication device |
| CN104242249A (en) * | 2014-09-17 | 2014-12-24 | 广州金升阳科技有限公司 | Protective circuit of switching power supply |
| CN104242249B (en) * | 2014-09-17 | 2017-08-29 | 广州金升阳科技有限公司 | A kind of protection circuit of Switching Power Supply |
| CN105056366A (en) * | 2015-08-08 | 2015-11-18 | 潘秀兰 | Brain wave resonator |
| CN105934021A (en) * | 2016-05-03 | 2016-09-07 | 电子科技大学 | Overvoltage adjusting circuit for linear constant-current driving LED |
| CN106229954A (en) * | 2016-09-19 | 2016-12-14 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN106229954B (en) * | 2016-09-19 | 2018-08-24 | 中国电子科技集团公司第十八研究所 | Self-adaptive overcurrent protection circuit |
| CN106953297A (en) * | 2017-05-26 | 2017-07-14 | 青岛东软载波科技股份有限公司 | A kind of protection circuit |
| CN106953297B (en) * | 2017-05-26 | 2020-03-10 | 青岛东软载波科技股份有限公司 | Protective circuit |
| CN109936287A (en) * | 2017-12-16 | 2019-06-25 | 厦门新页科技有限公司 | A kind of voltage regulator circuit with input undervoltage, overvoltage protection |
| CN108199566A (en) * | 2017-12-26 | 2018-06-22 | 成都鼎信致远科技有限公司 | Direct current window type work high temperature pulse power supply with DC over-voltage protection |
| CN108494247A (en) * | 2018-04-28 | 2018-09-04 | 惠州市德赛西威汽车电子股份有限公司 | A kind of power circuit for taking into account 180V high voltage protectives and 5V operating on low voltage |
| CN108494247B (en) * | 2018-04-28 | 2019-12-17 | 惠州市德赛西威汽车电子股份有限公司 | Power supply circuit giving consideration to 180V high-voltage protection and 5V low-voltage work |
| CN110739660A (en) * | 2019-09-23 | 2020-01-31 | 上海空间电源研究所 | protection circuit for satellite load |
| CN110739660B (en) * | 2019-09-23 | 2021-10-01 | 上海空间电源研究所 | Protection circuit for satellite load |
| CN113541098A (en) * | 2021-09-14 | 2021-10-22 | 杭州博雅鸿图视频技术有限公司 | Power supply protection circuit and antenna device |
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