CN106532625A - Protection circuit module for network cable power supply channel, power supply channel, power supply equipment and power supply system - Google Patents
Protection circuit module for network cable power supply channel, power supply channel, power supply equipment and power supply system Download PDFInfo
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- CN106532625A CN106532625A CN201611093528.3A CN201611093528A CN106532625A CN 106532625 A CN106532625 A CN 106532625A CN 201611093528 A CN201611093528 A CN 201611093528A CN 106532625 A CN106532625 A CN 106532625A
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- circuit
- power supply
- protection circuit
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- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000001681 protective effect Effects 0.000 claims description 11
- 239000004065 semiconductor Substances 0.000 claims description 9
- 230000001052 transient effect Effects 0.000 claims description 8
- 239000000919 ceramic Substances 0.000 claims description 5
- 230000001629 suppression Effects 0.000 claims description 5
- 230000011664 signaling Effects 0.000 claims description 4
- 238000012163 sequencing technique Methods 0.000 claims description 3
- 108091006146 Channels Proteins 0.000 description 20
- 238000010276 construction Methods 0.000 description 4
- 230000005611 electricity Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000011889 copper foil Substances 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- RVCKCEDKBVEEHL-UHFFFAOYSA-N 2,3,4,5,6-pentachlorobenzyl alcohol Chemical compound OCC1=C(Cl)C(Cl)=C(Cl)C(Cl)=C1Cl RVCKCEDKBVEEHL-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/026—Current limitation using PTC resistors, i.e. resistors with a large positive temperature coefficient
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
- H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
- H02H9/047—Free-wheeling circuits
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention provides a protection circuit module for a network cable power supply channel, a power supply channel, power supply equipment and a power supply system. The protection circuit module comprises a communication line ESD protection circuit, a communication line short-circuit protection circuit, a power supply power-on sequential control circuit and a power supply short-circuit protection circuit, wherein the communication line short-circuit protection circuit is connected with the communication line ESD protection circuit; the communication line ESD protection circuit is connected with a network interface module through a network data line; the input end of the power supply power-on sequential control circuit is connected with a power supply module of the power supply equipment while the output end is connected with the input end of the power supply short-circuit protection circuit; and the output end of the power supply short-circuit protection circuit is connected with the network interface module through a power line. The network interface module is connected with a network interface module of power-receiving equipment; the power-receiving equipment transmits electric energy and data; and by virtue of the communication line short-circuit protection circuit and the power supply short-circuit protection circuit, the power supply channel can be protected from being burnt down by short circuit.
Description
Technical field
The application is related to network transmission system and electric power system field, more particularly to a kind of protection electricity of Power-over-Ethernet passage
Road module, supplying channels, equipment and system.
Background technology
With the extensive application of safety defense monitoring system, the first-class terminal device of network doorbell, intercom, network shooting is in life
In popularize very much.And problem appear to is that thereupon:The distributed power supply of various terminal equipment increases safety monitoring
The difficulty of system deployment.And the construction cost that increased system deployment is, the difficulty for increasing system operation maintenance management；And
The safety coefficient of system is reduced, and the protection circuit of existing Power-over-Ethernet equipment is not complete, is set using the Power-over-Ethernet of 8 ports
Standby, power supply short circuit and data wire short-circuit protection are not designed.
In engineering construction, the crystal head of network interface needs to suppress at the scene, so that 8 netting twines are connected together；It is right
In the Power-over-Ethernet equipment using 8 port Power-over-Ethernets, if there is no the short-circuit protection of power supply and network data, easily cause to burn
Power line, the PCB Copper Foils of network data line and netting twine, serious meeting cause fire, make engineering construction there is potential safety hazard.
The content of the invention
The application provides protection circuit module, supplying channels, equipment and the system of Power-over-Ethernet passage, can prevent network
Line short circuit.
According to the application's in a first aspect, the application provides a kind of protection circuit module of Power-over-Ethernet passage, including：It is logical
News line esd protection circuit, communication line short-circuit protection circuit, power source charging sequential control circuit and short circuit protection electricity
Road；The communication line short-circuit protection circuit is connected with the connection esd protection circuit, the connection esd protection circuit
(1-3) it is connected with Network Interface Module by network data line；The input of the power source charging sequential control circuit and power supply
The power module connection of equipment, output end are connected with the input of the power supply short-circuit protective circuit, the power source short-circuit protection
The output end of circuit is connected with the Network Interface Module of power supply unit by power line.
According to the second aspect of the application, the application provides a kind of supplying channels, including Power-over-Ethernet passage described above
Protection circuit module.
According to the third aspect of the application, the application provides a kind of power supply unit, including supplying channels as above, with
And, modular power source；The modular power source is connected with the power supply electrifying and sequencing circuit of the supplying channels.
According to the fourth aspect of the application, the application provides a kind of electric power system, including：Power supply unit as above with
And power receiving equipment.
The protection circuit module of the Power-over-Ethernet passage of the application, supplying channels, equipment and system, including：Connection ESD
Protection circuit, communication line short-circuit protection circuit, power source charging sequential control circuit and short circuit protection circuit；Connection
Road short-circuit protection circuit is connected with connection esd protection circuit, and connection esd protection circuit is connect with network by network data line
Mouth mold block connects.The input of power source charging sequential control circuit is connected with the power module of power supply unit, output end and power supply
The input connection of short-circuit protection circuit, the output end of power supply short-circuit protective circuit are connected with Network Interface Module by power line
Connect.Network Interface Module is connected with the Network Interface Module of power receiving equipment, so as to transmit electric energy and data for power receiving equipment, due to
Connection short-circuit protection circuit and short circuit protection circuit are provided with, so as to protect supplying channels not burnt because of short circuit
Ruin.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become from the description with reference to accompanying drawings below to embodiment
Substantially with it is easy to understand, wherein：
Structured flowcharts of the Fig. 1 for the protection circuit module of the Power-over-Ethernet passage of the embodiment of the present application；
Another structured flowcharts of the Fig. 2 for the protection circuit module of the Power-over-Ethernet passage of the embodiment of the present application；
Fig. 3 for the embodiment of the present application Power-over-Ethernet passage protection circuit module power source charging sequential control circuit with
And the structural representation of short circuit protection circuit；
Connection esd protection circuit, communication of the Fig. 4 for the protection circuit module of the Power-over-Ethernet passage of the embodiment of the present application
The structural representation of line short protection circuit；
Structured flowcharts of the Fig. 5 for the Power-over-Ethernet passage of the embodiment of the present application；
Structured flowcharts of the Fig. 6 for the power supply unit of the embodiment of the present application；
Structured flowcharts of the Fig. 7 for the electric power system of the embodiment of the present application.
Specific embodiment
Accompanying drawing is combined below by specific embodiment to be described in further detail the present invention.The application provides a kind of net
The protection circuit module of line supplying channels, supplying channels, equipment and system, can prevent grid line short circuit.
Embodiment one：
Fig. 1 is referred to, Fig. 1 is the structured flowchart of the protection circuit module of the Power-over-Ethernet passage of the embodiment of the present application one,
As shown in figure 1, the embodiment of the present application provides a kind of protection circuit module of Power-over-Ethernet passage, including：
Connection esd protection circuit 1-3, communication line short-circuit protection circuit 1-4, power source charging sequential control circuit 1-5
And short circuit protection circuit 1-6.
Communication line short-circuit protection circuit 1-4 is connected with connection esd protection circuit 1-3, connection esd protection circuit 1-
3 are connected with Network Interface Module 1-1 by network data line 1-2.
The input of power source charging sequential control circuit 1-5 is connected with the power module of power supply unit, output end and power supply
The input connection of short-circuit protection circuit 1-6, the output end of power supply short-circuit protective circuit 1-6 are set with power supply by power line 1-7
Standby Network Interface Module 1-1 connections.
As shown in Fig. 2 in the present embodiment, the Network Interface Module 1-1 of power supply unit is RJ45 interfaces, RJ45 interface bags
Include:8 pins.
Wherein, the 1-2/3-6 pins of the RJ45 interfaces of power supply unit are network data lines, the RJ45 interfaces with power receiving equipment
1-2/3-6 pins connect one to one, by by the RJ45 interface grafting of the RJ45 interfaces of power supply unit and power receiving equipment, passing
Defeated network data is to receiving end equipment.The 4-5/7-8 pins of the RJ45 interfaces of power supply unit are power lines, with power receiving equipment
The 4-5/7-8 pins of RJ45 interfaces connect one to one, and input power can be sent to receiving end equipment.
In the present embodiment, connection esd protection circuit 1-3 is by network data line 1-2 and the 1-2 and 3- of RJ45 interfaces
6 pins connect.
The output end of power supply short-circuit protective circuit 1-6 is connected with 4-5 the and 7-8 pins of RJ45 interfaces by power line 1-7
Connect.
As shown in figure 3, in the present embodiment, power source charging sequential control circuit 1-5 includes：Main control unit U7, signaling switch
Q2 and power switch Q1.
Main control unit U7 is used to be spaced the electric energy of Preset Time reception power module 70 and export high level.
Signal metal-oxide-semiconductor Q2 is connected with the output end of main control unit U7, is turned on when main control unit U7 exports high level.
Power MOS pipe Q1 is connected with the output end of signal metal-oxide-semiconductor Q2, is turned on and is exported low when signal metal-oxide-semiconductor Q2 is turned on
During level, the power MOS pipe Q1 conductings, output electric energy to power supply short-circuit protective circuit 1-6.
Power source charging sequential control circuit 1-5 main devices include single-chip microcomputer U7, signal metal-oxide-semiconductor Q2, power MOS pipe Q1.
As power supply unit generally comprises the supplying channels of multichannel, power and transmit for a power receiving equipment by supplying channels all the way
Data.Preferably, end equipment of powering supports 16 road supplying channels.When end equipment of powering accesses multiple receiving end equipment, in order to
Multiple power supply unit sequence power-ons are enable, therefore by 16 road supplying channels sequence power-on of single-chip microcomputer U7 programme-control, per road
Power-on time interval is adjustable, and 30 seconds are preferably arranged in the system.Specifically, when single-chip microcomputer U7 exports high level, signal is opened
Close Q2 conductings, power switch Q1 conductings, so as to receiving end equipment obtains electric.In the present embodiment, signaling switch Q2 and power switch Q1
Metal-oxide-semiconductor can be adopted.Signaling switch Q2 is preferably 60V, and the N-MOS pipes of 115mA, power switch Q1 preferably use 60V, the P- of 26A
Metal-oxide-semiconductor.
The utilization of power source charging sequential control circuit 1-5, makes the upper electricity overshoot power reduction of system, can reduce modular power source
Power, it is cost-effective, and due to being controlled using single-chip microcomputer, thus remote controlled unlatching per road supplying channels and
Close.
Please continue to refer to Fig. 3, in the present embodiment, short circuit protection circuit 1-6 includes Power SBD D1, pressure
Quick resistance F1 and resettable fuse F2.
The anode of Power SBD D1 is connected with the output end of power source charging sequential control circuit 1-5, negative electrode string
Meet resettable fuse F2 and be followed by dc source.
Piezo-resistance F1 one end is connected with the negative electrode of Power SBD D1, one end ground connection.
Power supply short-circuit protective circuit 1-6 main devices include Power SBD D1, piezo-resistance F1 and can be extensive
Double insurance silk F2.For receiving end device power supply (DPS) is accessed without fool proof and non-polar occasion, Schottky diode D1 can be played
Foolproof function, it is ensured that power supply will not be short-circuited.Piezo-resistance F1 is used for the surge protection of power port.Resettable fuse F2
For the short-circuit protection of power circuit, when supplying channels have short circuit to occur, output current is sharply increased, resettable fuse F2
Deenergization is powered；The type selecting of resettable fuse F2 can be selected according to the power that load and netting twine are carried, and selection can recover
Fuse will consider operational voltage value, it is impossible to which, less than maximum operational voltage value, resettable fuse is preferably used in systems
Parameter be 1.1A, 72V.
In the present embodiment, connection esd protection circuit 1-3 includes:Network transformer T2.
The input and output side of network transformer T2 is connected to Transient Suppression Diode (U1/U2/U5/U6).
The output end of network transformer T2 is also associated with ceramic anti-thunder tube (U3/U4).
As shown in figure 4, connection short-circuit protection circuit 1-4 is made up of 4 electric capacity (C1/C2/C3/C4).As network becomes
Internal resistance very little between two line of RX1-/RX+ (TX1-/TX+) differential pair of depressor T2, along with circuit board will to RX1-/RX+,
TX1-/TX+ does difference impedance matching, and the live width of circuit board wiring is typically smaller, in the middle of engineering construction, 8 core netting twine wholes
Short circuit together when, between two line of differential pair RX1-/RX+ (TX1-/TX+) formed loop, can burn network transformer T2 and
The circuit board Copper Foil of RX1-/RX+ (TX1-/TX+) differential pair, can cause fire when serious.Using electric capacity every straight characteristic,
RJ45 interfaces to electric capacity, the method are sealed between differential pair RX1-/RX+ (TX1-/TX+) can effective protection connection.Electric capacity
(C1/C2/C3/C4) selection to be considered the maximum workmanship voltage of system, and capacitance can not be bigger than normal, and the system selects 100V,
0.1uF。
Connection short-circuit protection circuit 1-4 and power supply short-circuit protective circuit 1-6 are effectively combined, power line and connection it
Between, any short circuit, any misconnection, energy effective protection will not burn circuit, outside wire rod and external equipment.
Please continue to refer to Fig. 4, connection esd protection circuit 1-3 main device has ceramic anti-thunder tube (U3/U4), transient state
Suppress diode (U1/U2/U5/U6), network transformer (T2), electric capacity (C1/C2/C3/C4) and resistance (R1/R2/R3/R4)
Composition.
Ceramic discharge tube (U3/U4) constitutes the first order and releases path, and releasing as high current is released to CHGND；Transient state
Suppress diode (U5/U6), electric capacity (C1/C2/C3/C4) to constitute the second level to release path, electric capacity decoupling is used in centre；Transient state suppresses
Diode (U1/U2), network transformer T2 and resistance (R1/R2/R3/R4) constitute the third level and release path, centre network
Transformer T2 and resistance (R1/R2/R3/R4) decoupling.
Transient Suppression Diode (U1/U2/U5/U6), network transformer (T2) are protected and common mode as differential mode in circuit
Protection.
The common mode protection of Transient Suppression Diode is the ground of protection back-end circuit, Transient Suppression Diode and network transformer
Must be i.e. signal ground GND samely with the ground of back-end circuit.
In the system high current release ground CHGND be connected with ground, high current release CHGND and signal ground GND,
PCBA is entirely isolated；Isolation spacing preferably controls 3mm.
What the system was adopted releases path with ground processing method, and test result shows：Common mode residual voltage is low, back-end circuit with it is big
Current drain ground is isolated, and whether the quality of the earth situation is affected less on which；Front end ceramic discharge tube is directly grounded,
High current is directly released to the earth, rear end TVS plays second and third level and protects, and protected effect is good；Good stability；Reduce from
The path of the electric current that front end comes, so as to protect the circuit or chip of rear end well.
Embodiment two：
As shown in figure 5, in the present embodiment, there is provided a kind of supplying channels 200, supply including the such as netting twine introduced by embodiment one
The protection circuit module of electric channel.
Embodiment three：
It is as shown in fig. 6, in the present embodiment, there is provided a kind of power supply unit 300, logical including the such as power supply introduced by embodiment two
Road 200, and, modular power source 70；Modular power source 70 is connected with the power supply electrifying and sequencing circuit 1-5 of supplying channels.
In the present embodiment, the quantity of supplying channels is preferably 16 tunnels.
The input of modular power source 70 is 220V AC powers, after the internal circuit of modular power source 70 is processed, exports 9V
The dc source of～48V, as the input power of power source charging sequential control circuit 1-5.
Example IV：
As shown in fig. 7, in the present embodiment, there is provided a kind of electric power system 500, including：Such as the power supply introduced by embodiment three
Equipment 300 and power receiving equipment 400.
Above content is with reference to specific embodiment further description made for the present invention, it is impossible to assert this
It is bright to be embodied as being confined to these explanations.For general technical staff of the technical field of the invention, do not taking off
On the premise of present inventive concept, some simple deduction or replace can also be made.
Claims (10)
1. a kind of protection circuit module of Power-over-Ethernet passage, it is characterised in that include：
Connection esd protection circuit (1-3), communication line short-circuit protection circuit (1-4), power source charging sequential control circuit (1-
And short circuit protection circuit (1-6) 5)；
The communication line short-circuit protection circuit (1-4) is connected with the connection esd protection circuit (1-3), the connection
Esd protection circuit (1-3) is connected with Network Interface Module (1-1) by network data line (1-2)；
The input of the power source charging sequential control circuit (1-5) is connected with the power module of power supply unit, output end and institute
The input connection of power supply short-circuit protective circuit (1-6) is stated, the output end of the power supply short-circuit protective circuit (1-6) passes through power supply
Line (1-7) is connected with the Network Interface Module (1-1) of power supply unit.
2. the protection circuit module of Power-over-Ethernet passage as claimed in claim 1, it is characterised in that the Network Interface Module
(1-1) it is RJ45 interfaces, the RJ45 interfaces include:8 pins.
3. the protection circuit module of Power-over-Ethernet passage as claimed in claim 2, it is characterised in that the connection ESD is protected
Protection circuit (1-3) is connected with 1-2 the and 3-6 pins of RJ45 interfaces by network data line (1-2)；
4-5 and 7-8 of the output end of the power supply short-circuit protective circuit (1-6) by power line (1-7) with RJ45 interfaces are managed
Pin connects.
4. the protection circuit module of the Power-over-Ethernet passage as described in any one in claims 1 to 3, it is characterised in that
The power source charging sequential control circuit (1-5) includes：Main control unit U7, signaling switch Q2 and power switch Q1；
The main control unit U7 is used to be spaced the electric energy of the Preset Time reception power module and export high level；
The signal metal-oxide-semiconductor Q2 is connected with the output end of the main control unit U7, when the main control unit U7 exports high level
Conducting；
The power MOS pipe Q1 is connected with the output end of the signal metal-oxide-semiconductor Q2, is turned on and is exported in the signal metal-oxide-semiconductor Q2
During low level, the power MOS pipe Q1 conductings, output electric energy to the power supply short-circuit protective circuit (1-6).
5. the protection circuit module of Power-over-Ethernet passage as claimed in claim 4, it is characterised in that the short circuit protection
Circuit (1-6) includes Power SBD D1, piezo-resistance F1 and resettable fuse F2；
The anode of the Power SBD D1 is connected with the output end of the power source charging sequential control circuit (1-5),
Negative electrode concatenates the resettable fuse F2 and is followed by dc source；
Described piezo-resistance F1 one end is connected with the negative electrode of the Power SBD D1, one end ground connection.
6. the protection circuit module of the Power-over-Ethernet passage as described in any one in claims 1 to 3, it is characterised in that
The connection esd protection circuit (1-3) includes:Network transformer T2；
The input and output side of the network transformer T2 is connected to Transient Suppression Diode (U1/U2/U5/U6)；
The output end of the network transformer T2 is also associated with ceramic anti-thunder tube (U3/U4).
7. a kind of supplying channels, it is characterised in that include Power-over-Ethernet passage as described in any one in claim 1-6
Protection circuit module.
8. a kind of power supply unit, it is characterised in that including supplying channels as claimed in claim 7, and, modular power source；Institute
State modular power source to be connected with the power supply electrifying and sequencing circuit of the supplying channels.
9. power supply unit as claimed in claim 8, it is characterised in that the quantity of the supplying channels is 16 tunnels.
10. a kind of electric power system, it is characterised in that include：Power supply unit as claimed in claim 8 or 9 and power receiving equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093528.3A CN106532625B (en) | 2016-11-30 | 2016-11-30 | Protection circuit module, supplying channels, equipment and the system in Power-over-Ethernet channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611093528.3A CN106532625B (en) | 2016-11-30 | 2016-11-30 | Protection circuit module, supplying channels, equipment and the system in Power-over-Ethernet channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106532625A true CN106532625A (en) | 2017-03-22 |
| CN106532625B CN106532625B (en) | 2018-11-30 |
Family
ID=58354251
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611093528.3A Active CN106532625B (en) | 2016-11-30 | 2016-11-30 | Protection circuit module, supplying channels, equipment and the system in Power-over-Ethernet channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106532625B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115202246A (en) * | 2021-04-13 | 2022-10-18 | 北汽福田汽车股份有限公司 | A circuit for automatically entering debugging mode and a vehicle controller |
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| CN206283234U (en) * | 2016-11-30 | 2017-06-27 | 深圳市泛海三江科技发展有限公司 | The protection circuit module of Power-over-Ethernet passage, supplying channels, equipment and system |
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| CN201038746Y (en) * | 2007-05-22 | 2008-03-19 | 中兴通讯股份有限公司 | Protector for surge |
| CN203774782U (en) * | 2013-12-31 | 2014-08-13 | 上海旋思科技有限公司 | Lightening protection device for communication port |
| CN103872673A (en) * | 2014-03-28 | 2014-06-18 | 杭州敦崇科技股份有限公司 | Three-level lightning prevention module of internet access protection |
| US20160087422A1 (en) * | 2014-09-22 | 2016-03-24 | International Rectifier Corporation | Fault and Short-Circuit Protected Output Driver |
| CN104934957A (en) * | 2015-07-10 | 2015-09-23 | 上海斐讯数据通信技术有限公司 | POE switch lightning protection circuit |
| CN205545180U (en) * | 2016-03-31 | 2016-08-31 | 康佳集团股份有限公司 | Short -circuit protection circuit and power supply device |
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| CN206283234U (en) * | 2016-11-30 | 2017-06-27 | 深圳市泛海三江科技发展有限公司 | The protection circuit module of Power-over-Ethernet passage, supplying channels, equipment and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115202246A (en) * | 2021-04-13 | 2022-10-18 | 北汽福田汽车股份有限公司 | A circuit for automatically entering debugging mode and a vehicle controller |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106532625B (en) | 2018-11-30 |
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