CN206743267U - A kind of non-isolated power supply circuit and equipment - Google Patents
A kind of non-isolated power supply circuit and equipment Download PDFInfo
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- CN206743267U CN206743267U CN201720222025.5U CN201720222025U CN206743267U CN 206743267 U CN206743267 U CN 206743267U CN 201720222025 U CN201720222025 U CN 201720222025U CN 206743267 U CN206743267 U CN 206743267U
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Abstract
The utility model discloses a kind of non-isolated power supply circuit and equipment, including：DC modular converter, power supply protection module, POE module and Ethernet interface；Wherein, the output end through DC modular converter exports after DC modular converter is used for the supply voltage conversion by power supply input；Protection module of powering is used to carry out interference signal progress noise processed caused by conversion process in the supply voltage to power supply input to DC modular converter, and supply voltage is transferred into POE module；POE module is used to export by the output end of Ethernet interface after the supply voltage of power supply protection module transmission is received.Therefore, by setting power supply protection module to be filtered to interference signal caused by DC modular converter and noise processed, so as to avoid interference signal from being coupled on Ethernet interface, and then CE excessive problems can be avoided.
Description
Technical field
Electronic circuit technology field is the utility model is related to, more particularly to a kind of non-isolated power supply circuit and equipment.
Background technology
POE (Power Over Ethernet, POE) is referred in existing Ethernet wiring architecture not
In the case of making any change, while data are transmitted for some communication products, moreover it is possible to carry out direct current for these communication products
The technology of power supply.And POE technologies are widely used in security protection monitoring system.At present, in the network video recorder of low side
In (Network Video Record, NVR), in order to reduce cost, generally use POE and low-tension supply power supply with same confession
The connected Low Cost Mode of power supply.Wherein, POE is the supply voltage that power supply is received by POE chips, and will be received
Supply voltage be output to POE network interfaces, powered by POE network interfaces to the external equipment that is connected with POE network interfaces.
Low-tension supply power supply is to receive to supply by DC (Direct Current Direct Current, DCDC) change-over circuit
The supply voltage of power supply, and the supply voltage received is converted to NVR operating voltage, to be powered to NVR.
However, because DC/DC converter circuit by supply voltage during NVR operating voltage is converted to, it is caused to open
Powered-down source noise is general all bigger.And for POE chips, because power supply is outside by POE chips and POE network interfaces
Portion's equipment power supply, such switching power supply noise can be also coupled on POE network interfaces, so as to cause the biography of POE network interfaces
It is exceeded to lead transmitting (Conducted Emission, CE).
Therefore, how switching power supply noise is suppressed by simple structure and takes into account carrying out surge protection, be art technology
The problem of personnel's urgent need to resolve.
Utility model content
The utility model embodiment provides a kind of non-isolated power supply circuit and equipment, to be suppressed by simple structure
Switching power supply noise.
Therefore, the utility model embodiment provides a kind of non-isolated power supply circuit, including：DC modular converter,
Power supply protection module, POE module and Ethernet interface；Wherein,
The input of the DC modular converter is connected with power supply input；The DC modular converter
Exported for the output end through the DC modular converter after the supply voltage conversion by the power supply input；
The input of the power supply protection module is connected with the power supply input, the defeated of protection module of powering
Go out end with the input of the POE module to be connected；The power supply protection module is used for the DC modulus of conversion
Block interference signal caused by carry out conversion process to the supply voltage of the power supply input is filtered and noise
Processing, and the supply voltage is transferred to the POE module；
The output end of the POE module is connected with the input of the Ethernet interface；The POE
Module is used to export by the output end of the Ethernet interface after the supply voltage of the power supply protection module transmission is received.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, in addition to：Carrying out surge protection mould
Block；Wherein,
The input of the carrying out surge protection module is connected with the output end of the power supply protection module, the carrying out surge protection mould
The output end of block is connected with the input of the power supply protection module；The carrying out surge protection module is used in the Ethernet interface
During with surge voltage, it is the first predeterminated voltage to make the voltage difference between the output end of the power supply protection module and its input
Difference.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the carrying out surge protection module
Including：Fast diode；Wherein,
Input of the positive pole of the fast diode as the carrying out surge protection module, the negative pole of the fast diode
Output end as the carrying out surge protection module.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the power supply protection module
Including：Inductance；Wherein,
Input of the first end of the inductance as the power supply protection module, described in the second end of the inductance is used as
The output end of power supply protection module.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, in addition to：Power supply mould
Block；Wherein,
The input of the power supply module is connected with the power supply input, and output end is connected with earth terminal；
The power supply module be used for when the Ethernet interface has surge voltage, make the power supply input with it is described
Voltage difference between earth terminal is poor for the second predeterminated voltage.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the power supply module
Including：Transient voltage suppressor；Wherein, the just extremely described power supply module of the transient voltage suppressor
Output end, negative pole are the input of the power supply module；And/or
The power supply module includes：Piezo-resistance；The first end of wherein described piezo-resistance is the power supply
The input of module, the second end are the output end of the power supply module.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the POE mould
Block includes：POE chip；Wherein,
The direct-flow input end of the POE chip be the POE module input, the Ethernet
The DC output end of power supply chip is the output end of the POE module.
Preferably, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the DC conversion
Module includes：DC change-over circuit；Wherein,
The direct-flow input end of the DC change-over circuit is the input of the DC modular converter, described straight
The DC output end for flowing DC converting circuit is the output end of the DC modular converter.
Correspondingly, the utility model embodiment additionally provides a kind of non-isolated power supply unit, including the utility model is implemented
Any of the above-described kind of non-isolated power supply circuit that example provides.
Preferably, in the above-mentioned non-isolated power supply unit that the utility model embodiment provides, in addition to：With it is described it is non-every
The video being electrically connected with from the output end of DC modular converter described in power supply circuit stores processor, the non-isolated confession
Electric equipment is network video recorder.
The utility model has the beneficial effect that：
The non-isolated power supply circuit and equipment that the utility model embodiment provides, including：DC modular converter, power supply
Protection module, POE module and Ethernet interface；Wherein, DC modular converter is used to input power supply
Output end output through DC modular converter after the supply voltage conversion at end；Protection module of powering is used to turn DC
Mold changing block interference signal caused by carry out conversion process to the supply voltage of power supply input is filtered and noise
Processing, and supply voltage is transferred to POE module；POE module is used to receive protection module of powering
Exported after the supply voltage of transmission by the output end of Ethernet interface.Therefore, by setting power supply protection module can be to straight
Interference signal caused by stream DC conversion modules is filtered and noise processed, so as to avoid DC modular converter from producing
Raw interference signal is coupled on Ethernet interface, and then can avoid CE excessive problems.
Brief description of the drawings
Fig. 1 a are one of structural representation of non-isolated power supply circuit that the utility model embodiment provides；
Fig. 1 b are the two of the structural representation for the non-isolated power supply circuit that the utility model embodiment provides；
Fig. 2 a are the concrete structure schematic diagram of the non-isolated power supply circuit shown in Fig. 1 a；
Fig. 2 b are the concrete structure schematic diagram of the non-isolated power supply circuit shown in Fig. 1 b.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with the accompanying drawings, new to this practicality
The non-isolated power supply circuit and the embodiment of equipment that type embodiment provides are described in detail.It is it should be appreciated that following
Described preferred embodiment is merely to illustrate and explained the utility model, is not used to limit the utility model.And not
In the case of conflict, the feature in embodiment and embodiment in the application can be mutually combined.
The utility model embodiment provides a kind of non-isolated power supply circuit, as shown in Figure 1a, including：DC is changed
Module 10, power supply protection module 20, POE module 30 and Ethernet interface 40；Wherein,
The input 10a of DC modular converter 10 is connected with power supply input VDD；DC modular converter
10 are used for (Fig. 1 a are not for the output end through DC modular converter 10 after the conversion of power supply input VDD supply voltage
Show) output；
The input 20a of power supply protection module 20 is connected with power supply input VDD, the output for protection module 20 of powering
End 20b is connected with the input 30a of POE module 30；Protection module 20 of powering is used for DC modular converter 10
Interference signal caused by carrying out conversion process to power supply input VDD supply voltage be filtered and noise at
Reason, and supply voltage VDD is transferred to POE module 30；
The output end 30b of POE module 30 is connected with the input 40a of Ethernet interface 40；POE mould
Block 30 is used for after the supply voltage VDD of the power supply transmission of protection module 20 is received by output end (Fig. 1 a of Ethernet interface 40
It is not shown) output.
The above-mentioned non-isolated power supply circuit that the utility model embodiment provides, including：DC modular converter, power supply are anti-
Protect module, POE module and Ethernet interface；Wherein, DC modular converter is used for power supply input
Supply voltage conversion after through DC modular converter output end output；Protection module of powering is used to change DC
Module interference signal caused by carrying out conversion process to the supply voltage of power supply input be filtered and noise at
Reason, and supply voltage is transferred to POE module；POE module is used to receive power supply protection module biography
Exported after defeated supply voltage by the output end of Ethernet interface.Therefore, the utility model embodiment provide it is above-mentioned it is non-every
From power supply circuit, by setting power supply protection module to be filtered to interference signal caused by DC modular converter and
Noise processed, so as to avoid interference signal caused by DC modular converter from being coupled on Ethernet interface, Jin Erke
To avoid CE excessive problems.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, power supply is defeated
The supply voltage for entering end can be 48V DC voltage, and the supply voltage is provided by externally fed equipment.DC turns
The 48V of power supply input supply voltage can be converted to 12V DC voltage and output by mold changing block.Certainly,
In actual applications, supply voltage can also be the direct current with other magnitudes of voltage that can realize function of the present utility model
The supply voltage of power supply input can also be converted to other magnitudes of voltage by pressure, DC modular converter
DC voltage simultaneously exports, and is not limited thereto.
The general network transmission cable that when having thunder and lightning situation out of doors, Ethernet interface 40 uses often senses higher
Lightning surge voltage, consequently, it is possible to by Ethernet interface 40 to non-isolated power supply circuit flow into higher-energy surge electricity
Pressure, to produce a higher voltage between the input 20a and its output end 20b of power supply protection module 20, the voltage is folded
Add the input 30a for being together transferred to POE module 30 on the supply voltage, so as to cause POE mould
Circuit excessive pressure damages in block 30, influence its normal work.Therefore, in order to avoid the excessive pressure damages of POE module 30,
When it is implemented, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, as shown in Figure 1 b, can also wrap
Include：Carrying out surge protection module 50；Wherein,
The input 50a of carrying out surge protection module 50 is connected with the output end 20b for protection module 20 of powering, carrying out surge protection module
50 output end 50b is connected with the input 20a for protection module 20 of powering；Carrying out surge protection module 50 is used in Ethernet interface 40
During with surge voltage, make the voltage difference between the output end 20b of power supply protection module 20 and its input 20a default for first
Voltage difference.
Further, due to surge voltage it is also possible that the externally fed that supply voltage is provided to power supply input is set
It is standby to cause to damage, influence externally fed equipment normal work.Therefore in order to avoid externally fed device damage, it is being embodied
When, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, as shown in Figure 1 b, in addition to：Power supply mould
Block 60；Wherein,
The input 60a of power supply module 60 is connected with power supply input VDD, output end 60b and earth terminal GND
It is connected；Power supply module 60 is used for when Ethernet interface 40 has surge voltage, makes power supply input VDD and ground connection
Hold the voltage difference between GND poor for the second predeterminated voltage.
With reference to specific embodiment, the utility model is described in detail.It should be noted that it is in the present embodiment
In order to preferably explain the utility model, but do not limit the utility model.
Specifically, in the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, such as scheme
Shown in 2a and Fig. 2 b, power supply protection module 20 can specifically include：Inductance L；Wherein,
Inductance L first end the input 20a as power supply protection module 20, inductance L the second end are protected as power supply
The output end 20b of module 20.
Due to the forward conduction voltage drop of fast diode small (typically about 0.4V-0.5V), reverse recovery time is short and opens
It is small to close loss.Therefore, in the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, such as scheme
Shown in 2b, carrying out surge protection module 50 can specifically include：Fast diode D；Wherein,
Input 50a of the fast diode D positive pole as carrying out surge protection module 50, fast diode D negative pole conduct
The output end 50b of carrying out surge protection module 50.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, the first default electricity
Pressure difference can be the forward conduction voltage drop of fast diode.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, fast diode
Forward conduction voltage drop can be 0.4V-0.5V scopes in one.Certainly, in actual applications, the forward direction of fast diode
Conduction voltage drop needs to be determined according to actual application environment, is not limited thereto.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, as shown in Figure 2 b,
Power supply module 60 can specifically include：Transient voltage suppressor TVS；Wherein, transient voltage suppressor TVS
The just extremely output end 60b of power supply module 60, negative pole are the defeated such as end 60a of power supply module 60.
Or as shown in Figure 2 b, power supply module 60 can specifically include：Piezo-resistance R；Wherein piezo-resistance R's
First end is the input 60a of power supply module 60, and the second end is the output end 60b of power supply module 60.
It is preferred that in order to further improve the carrying out surge protection ability of power supply input, in the specific implementation, in this reality
In above-mentioned non-isolated power supply circuit with new embodiment offer, as shown in Figure 2 b, power supply module 60 can specifically include：
Transient voltage suppressor TVS and piezo-resistance R；Wherein,
Transient voltage suppressor TVS just extremely the output end 60b of power supply module 60, negative pole are power supply
The input 60a of module 60；Also, piezo-resistance R first end is the input 60a of power supply module 60, and the second end is
The output end 60b of power supply module 60.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, power supply is worked as
When module only includes transient voltage suppressor, the second predeterminated voltage difference is the forward conduction pressure of transient voltage suppressor
Drop.In the specific implementation, the forward conduction voltage drop of transient voltage suppressor can be 50V.Certainly, in actual applications,
The forward conduction voltage drop of transient voltage suppressor needs to be determined according to actual application environment, is not limited thereto.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, power supply is worked as
When module only includes piezo-resistance, the second predeterminated voltage difference is the pressure sensitive voltage of piezo-resistance.In actual applications, piezo-resistance
Pressure sensitive voltage need determined according to actual application environment, be not limited thereto.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, power supply is worked as
When module includes transient voltage suppressor and piezo-resistance, the second predeterminated voltage difference by transient voltage suppressor just
To conduction voltage drop and the pressure sensitive voltage collective effect of piezo-resistance.In actual applications, the forward direction of transient voltage suppressor
Conduction voltage drop and the pressure sensitive voltage of piezo-resistance need to be determined according to actual application environment, are not limited thereto.
Specifically, in the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, ether
Net power supply module can specifically include：POE chip；Wherein,
The direct-flow input end of POE chip be POE module input, POE chip it is straight
Flow the output end that output end is POE module.Wherein, the concrete structure of POE chip is same as the prior art,
It will be apparent to an ordinarily skilled person in the art that having, it is not described here in detail, also should not be used as to limit of the present utility model
System.
Certainly, in the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, Ethernet
Power supply module can also include the network switch or central router, be not limited thereto.
Specifically, in the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, direct current
DC conversion modules include：DC change-over circuit；Wherein,
The direct-flow input end of DC change-over circuit is the input of DC modular converter, and DC conversion is electric
The DC output end on road is the output end of DC modular converter.Wherein, the concrete structure of DC change-over circuit is with showing
Have that technology is identical, it will be apparent to an ordinarily skilled person in the art that having, it is not described here in detail, also should not be used as to this reality
With new limitation.
Non-isolated power supply electricity provided by the utility model is illustrated with the structure of the non-isolated power supply circuit shown in Fig. 2 b below
The protection process on road.
Because the DC change-over circuit in DC modular converter 10 is in the power supply to power supply input VDD
Voltage can be produced during conversion process the interference signal of exchange, and inductance L has inhibition to AC signal, so as to
So that caused interference signal is isolated in inductance L first end.And direct current signal inputs inductance L, and inductance L is that is, one
Root wire so that inductance L has conducting effect to direct current signal, therefore inductance L is to power supply input VDD supply voltage
The influence for inputting POE module 30 is little.So as to can not only influence supply voltage input POE module
30, the problem of interference signal can also being avoided to be coupled on Ethernet interface, and then CE can be avoided exceeded.
When having surge voltage caused by thunder and lightning on Ethernet interface 40, it can typically pass through POE module 30
Output end 30b is transferred to its input 30a, can be timely now because the fast diode D response times are short and reaction speed is fast
Conducting is so that surge voltage to be transferred out, and the diode D after conducting can clamp the voltage difference between its positive pole and negative pole
Its forward conduction voltage drop is made as, therefore makes the forward conduction that the voltage difference between inductance L first end and the second end is diode D
Pressure drop.Because diode D forward conduction voltage drop is typically in the range of 0.4V-0.5V, therefore surge voltage can be avoided to make electricity
Feel and produce higher induced electromotive force between L first end and the second end, so as to avoid in POE module 30
POE chip produces excessive pressure damages, so as to so that the carrying out surge protection ability of Ethernet interface 40 is more than or equal to 4kV.
Also, when DC change-over circuit produces AC influence signal, due to the reverse cut-off characteristicses of diode D, therefore diode D
Also there is inhibition to interference signal, therefore interference signal can also be avoided to be coupled on Ethernet interface, so as to enter
The problem of one step avoids CE exceeded.
The above-mentioned non-isolated power supply circuit that the utility model embodiment provides can be only by using inductance and quick two pole
The simple structure of pipe, interference signal caused by the DC change-over circuit in DC modular converter can have both been avoided to couple
The problem of causing CE exceeded on to Ethernet interface, the problem of lightning surge can be avoided again.
To be conceived based on same utility model, the utility model embodiment additionally provides a kind of non-isolated power supply unit, including
Any of the above-described kind of non-isolated power supply circuit that the utility model embodiment provides.The non-isolated power supply unit solves the principle of problem
It is similar to foregoing non-isolated power supply circuit, therefore the implementation of the non-isolated power supply unit may refer to foregoing non-isolated power supply circuit
Implementation, repeat part will not be repeated here.
In the specific implementation, in the above-mentioned non-isolated power supply circuit that the utility model embodiment provides, can also include：
The video being electrically connected with the output end of DC modular converter in non-isolated power supply circuit stores processor, non-isolated power supply
Equipment is network video recorder.Wherein, the concrete structure of video storage processor and the course of work are same as the prior art,
It will be apparent to an ordinarily skilled person in the art that having, it is not described here in detail, also should not be used as to limit of the present utility model
System.
The non-isolated power supply circuit and equipment that the utility model embodiment provides, including：DC modular converter, power supply
Protection module, POE module and Ethernet interface；Wherein, DC modular converter is used to input power supply
Output end output through DC modular converter after the supply voltage conversion at end；Protection module of powering is used to turn DC
Mold changing block interference signal caused by carry out conversion process to the supply voltage of power supply input is filtered and noise
Processing, and supply voltage is transferred to POE module；POE module is used to receive protection module of powering
Exported after the supply voltage of transmission by the output end of Ethernet interface.Therefore, by setting power supply protection module can be to straight
Interference signal caused by stream DC conversion modules is filtered and noise processed, so as to avoid DC modular converter from producing
Raw interference signal is coupled on Ethernet interface, and then can avoid CE excessive problems.
Obviously, those skilled in the art can carry out various changes and modification without departing from this practicality to the utility model
New spirit and scope.So, if these modifications and variations of the present utility model belong to the utility model claims and
Within the scope of its equivalent technologies, then the utility model is also intended to comprising including these changes and modification.
Claims (10)
- A kind of 1. non-isolated power supply circuit, it is characterised in that including：DC modular converter, power supply protection module, Ethernet Power supply module and Ethernet interface；Wherein,The input of the DC modular converter is connected with power supply input；The DC modular converter is used for Output end through the DC modular converter after the supply voltage conversion of the power supply input is exported；The input of the power supply protection module is connected with the power supply input, the output end of the power supply protection module It is connected with the input of the POE module；The power supply protection module is used to exist to the DC modular converter Interference signal caused by carrying out conversion process to the supply voltage of the power supply input is filtered and noise processed, And the supply voltage is transferred to the POE module；The output end of the POE module is connected with the input of the Ethernet interface；The POE module For being exported after the supply voltage of the power supply protection module transmission is received by the output end of the Ethernet interface.
- 2. non-isolated power supply circuit as claimed in claim 1, it is characterised in that also include：Carrying out surge protection module；Wherein,The input of the carrying out surge protection module is connected with the output end of the power supply protection module, the carrying out surge protection module Output end is connected with the input of the power supply protection module；The carrying out surge protection module is used to have in the Ethernet interface During surge voltage, make the voltage difference between the output end of the power supply protection module and its input poor for the first predeterminated voltage.
- 3. non-isolated power supply circuit as claimed in claim 2, it is characterised in that the carrying out surge protection module includes：Quick two Pole pipe；Wherein,Input of the positive pole of the fast diode as the carrying out surge protection module, the negative pole conduct of the fast diode The output end of the carrying out surge protection module.
- 4. non-isolated power supply circuit as claimed in claim 1, it is characterised in that the power supply protection module includes：Inductance；Its In,Input of the first end of the inductance as the power supply protection module, the second end of the inductance is as the power supply The output end of protection module.
- 5. the non-isolated power supply circuit as described in claim any one of 1-4, it is characterised in that also include：Power supply module； Wherein,The input of the power supply module is connected with the power supply input, and output end is connected with earth terminal；It is described Power supply module is used for when the Ethernet interface has surge voltage, makes the power supply input and the ground connection Voltage difference between end is poor for the second predeterminated voltage.
- 6. non-isolated power supply circuit as claimed in claim 5, it is characterised in that the power supply module includes：Transient electrical Constrain diode processed；Wherein, the output end of the just extremely described power supply module of the transient voltage suppressor, negative pole For the input of the power supply module；And/orThe power supply module includes：Piezo-resistance；The first end of wherein described piezo-resistance is the power supply module Input, the second end be the power supply module output end.
- 7. the non-isolated power supply circuit as described in claim any one of 1-4, it is characterised in that the POE module bag Include：POE chip；Wherein,The direct-flow input end of the POE chip be the POE module input, the POE The DC output end of chip is the output end of the POE module.
- 8. the non-isolated power supply circuit as described in claim any one of 1-4, it is characterised in that the DC modular converter Including：DC change-over circuit；Wherein,The direct-flow input end of the DC change-over circuit is the input of the DC modular converter, and the direct current is straight The DC output end for flowing change-over circuit is the output end of the DC modular converter.
- 9. a kind of non-isolated power supply unit, it is characterised in that including the non-isolated power supply electricity as described in claim any one of 1-8 Road.
- 10. non-isolated power supply unit as claimed in claim 9, it is characterised in that also include：With the non-isolated power supply circuit Described in DC modular converter output end be electrically connected with video storage processor, the non-isolated power supply unit is net Network video cassette recorder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720222025.5U CN206743267U (en) | 2017-03-08 | 2017-03-08 | A kind of non-isolated power supply circuit and equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720222025.5U CN206743267U (en) | 2017-03-08 | 2017-03-08 | A kind of non-isolated power supply circuit and equipment |
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| CN206743267U true CN206743267U (en) | 2017-12-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011290A (en) * | 2019-05-14 | 2019-07-12 | 罗山县三通达电子科技有限公司 | A kind of Ethernet interface anti-surge circuit |
-
2017
- 2017-03-08 CN CN201720222025.5U patent/CN206743267U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110011290A (en) * | 2019-05-14 | 2019-07-12 | 罗山县三通达电子科技有限公司 | A kind of Ethernet interface anti-surge circuit |
| CN110011290B (en) * | 2019-05-14 | 2021-10-22 | 罗山县三通达电子科技有限公司 | Ethernet interface anti-surge circuit |
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