CN105515559B - A kind of voltage commutation circuit applied to PSE interchangers - Google Patents
A kind of voltage commutation circuit applied to PSE interchangers Download PDFInfo
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- CN105515559B CN105515559B CN201610053646.5A CN201610053646A CN105515559B CN 105515559 B CN105515559 B CN 105515559B CN 201610053646 A CN201610053646 A CN 201610053646A CN 105515559 B CN105515559 B CN 105515559B
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- triode
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- power
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- 230000000087 stabilizing effect Effects 0.000 claims abstract description 42
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000003381 stabilizer Substances 0.000 claims description 31
- 239000004065 semiconductor Substances 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000012358 sourcing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
- H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/10—Current supply arrangements
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of voltage commutation circuits applied to PSE interchangers comprising power module, first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power conversion modules and Main Broad signal mainboards.The present invention inputs on the basis of not influencing product characteristic property according to different electrical power adapter, automatically switches powering mode, improves compatibility, the practicability of interchanger, reduces interchanger power attenuation so that its application is more extensive.The present invention is widely used in Power over Ethernet poe technical fields as a kind of voltage commutation circuit applied to PSE interchangers.
Description
Technical field
The present invention relates to Power over Ethernet poe technical fields more particularly to a kind of voltage switchings applied to PSE interchangers
Circuit.
Background technology
POE is also referred to as power supply system (POL, Power over LAN) or active Ethernet based on LAN
(Active Ethernet), is also called Power over Ethernet for short sometimes, this is to utilize the same of existing standard Ethernet transmission cable
When transmit the newest standards specifications of data and electrical power, and maintain the compatibility with existing Ethernet system and user.PSE
(Power Sourcing Equipment) refers to the equipment powered for ethernet client equipment.IEEE 802.3af standards
It is the new standard based on Power over Ethernet system POE, it increases on the basis of 802.3 IEEE and is directly powered by cable
Relevant criterion, be existing ethernet standard extension and first international standard about power distribution.
Communications industry development is getting faster, some small-sized PSE interchangers are accessed using external 48V power supply adaptors, are passed through
Internal circuit supplies Ethernet interface 48V function of supplying power.But sometimes only the interchanger simple as one is needed to carry out work, one
As the power supply adaptor of interchanger be all 12V.If going to use using PSE interchangers as general switch, it is possible to cause general
The exception of logical access device, and power also has waste.
Invention content
In order to solve the above-mentioned technical problem, the compatibility of interchanger, practicability are improved the object of the present invention is to provide a kind of,
Reduce the voltage commutation circuit applied to PSE interchangers of interchanger power attenuation.
The technical solution adopted in the present invention is：A kind of voltage commutation circuit applied to PSE interchangers comprising power supply
Module, first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V electricity
Source conversion module and Main Broad signal mainboards；The power module passes through first switch control module and poe Ethernets
Power supply module connects；The power module is connect with second switch control module, and the second switch control module turns with 48V
12V power conversion modules connect, and the 48V turns 12V power conversion modules and connect with Main Broad signal mainboards, and described second
Switch control module is connect with Main Broad signal mainboards；The first switch control module connects with second switch control module
It connects, the Voltage stabilizing module is connect with second switch control module, and the power module is connect with Voltage stabilizing module.
Further, the first switch control module include the first current-limiting resistance, the first voltage-stabiliser tube, the first metal-oxide-semiconductor and
The positive output end of second voltage-stabiliser tube, the power module is connect by first resistor with the negative pole end of the first voltage-stabiliser tube, and described
The positive terminal of one voltage-stabiliser tube is connect with the grid of the first metal-oxide-semiconductor, source electrode and the poe Power over Ethernet modules of first metal-oxide-semiconductor
Connection, the drain electrode of first metal-oxide-semiconductor and the negative output terminal of power module connect, the positive terminal and power supply of second voltage-stabiliser tube
The negative output terminal of module connects, and the negative pole end of second voltage-stabiliser tube is connect with the positive terminal of the first voltage-stabiliser tube.
Further, first metal-oxide-semiconductor is N-channel MOS pipe.
Further, the second switch control module includes：Third transistor, the 4th triode and relay, it is described
The base stage of third transistor is connect with the positive terminal of the first voltage-stabiliser tube, the emitter of the third transistor and bearing for power module
Output end connects, and the collector of the third transistor is connect with the base stage of the 4th triode, the current collection of the 4th triode
The positive output end of pole and power module connects, and the emitter of the 4th triode is connect with relay.
Further, the Voltage stabilizing module includes third current-limiting resistance, the 4th current-limiting resistance, the first triode, the two or three pole
Pipe and voltage stabilizing triode, the base stage of first triode connects with the collector of the second triode, first triode
Emitter and the second triode base stage connection, the positive output end of the collector and power module of first triode, institute
The positive input terminal for stating power module is connect by third current-limiting resistance with the base stage of the first triode, the hair of second triode
It is connected by the 4th current-limiting resistance between emitter-base bandgap grading and base stage, the negative pole end of the emitter and voltage stabilizing triode of second triode
The negative output terminal of connection, the positive terminal of the voltage stabilizing triode and power module connects, reference the pole of the voltage stabilizing triode and
Relay connects.
Further, the Voltage stabilizing module further includes third voltage-stabiliser tube, negative pole end and three pole of voltage stabilizing of the third voltage-stabiliser tube
The reference pole of pipe connects, and the positive terminal of the third voltage-stabiliser tube is connect with the positive terminal of voltage stabilizing triode.
Further, the model TL431 of the voltage stabilizing triode.
The beneficial effects of the invention are as follows：The present invention turns equipped with first switch control module, second switch control module and 48V
12V power conversion modules, when 48V plant-grid connections, power supply is supplied to poe Power over Ethernet modules, is supplied to Ethernet POE equipment
Power supply；In addition 48V power supplys by 48V turn 12V power conversion modules and turn 12V to be supplied to Main Broad signal main board power supplies.When
12V plant-grid connections, power supply are not poe Power over Ethernet module for power supply, and in addition power supply is directly that Main Broad signal mainboards supply
Electricity.The present invention is inputted according to different electrical power adapter, is automatically switched powering mode, is improved compatibility, the practicability of interchanger,
Reduce interchanger power attenuation so that its application is more extensive.
Description of the drawings
The specific implementation mode of the present invention is described further below in conjunction with the accompanying drawings：
Fig. 1 is the high-level schematic functional block diagram of the present invention；
Fig. 2 is the circuit diagram of the present invention.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.
As shown in Figure 1 to Figure 2, a kind of voltage commutation circuit applied to PSE interchangers comprising power module, first
Switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power conversion modules
And Main Broad signal mainboards；The power module is connected by first switch control module and poe Power over Ethernet modules
It connects；The power module is connect with second switch control module, and the second switch control module turns the conversion of 12V power supplys with 48V
Module connects, and the 48V turns 12V power conversion modules and connect with Main Broad signal mainboards, and the second switch controls mould
Block is connect with Main Broad signal mainboards；The first switch control module is connect with second switch control module, described steady
Die block is connect with second switch control module, and the power module is connect with Voltage stabilizing module.
Its working principle is that：The power module be entire circuit power supply, when 48V plant-grid connections, power supply be supplied to poe with
Too net power supply module is supplied to Ethernet POE equipment to power；In addition 48V power supplys turn 12V power conversion modules by 48V and turn 12V
It is supplied to Main Broad signal main board power supplies.When 12V plant-grid connections, power supply is not poe Power over Ethernet module for power supply, in addition
Power supply is directly Main Broad signal main board power supplies.The first switch control module for control power supply whether be poe with
Too net power supply module is powered, and the first switch control module is for controlling whether power supply by 48V turns 12V power conversion modules
For Main Broad signal main board power supplies.The Voltage stabilizing module is used to make the work under stable voltage of second switch control module
Make.
It is further used as preferred embodiment, the first switch control module includes the first current-limiting resistance R1, first
Voltage-stabiliser tube ZD1, the first metal-oxide-semiconductor M1 and the second voltage-stabiliser tube ZD2, the positive output end of the power module pass through the first current-limiting resistance
R1 is connect with the negative pole end of the first voltage-stabiliser tube ZD1, and the positive terminal of the first voltage-stabiliser tube ZD1 and the grid of the first metal-oxide-semiconductor M1 connect
It connects, the source electrode of the first metal-oxide-semiconductor M1 is connect with poe Power over Ethernet modules, drain electrode and the power supply mould of the first metal-oxide-semiconductor M1
The negative output terminal of block connects, and the positive terminal of the second voltage-stabiliser tube ZD2 and the negative output terminal of power module connect, and described second is steady
The negative pole end of pressure pipe ZD2 is connect with the positive terminal of the first voltage-stabiliser tube ZD1.
It is further used as preferred embodiment, the second switch control module includes：Third transistor Q3, the 4th
Triode Q4 and relay K1, the base stage of the third transistor Q3 are connect with the positive terminal of the first voltage-stabiliser tube ZD1, the third
The emitter of triode Q3 and the negative output terminal of power module connect, the collector and the 4th triode of the third transistor Q3
The base stage of Q4 connects, and the collector of the 4th triode Q4 and the positive output end of power module connect, the 4th triode
The emitter of Q4 is connect with relay K1.
It is further used as preferred embodiment, the Voltage stabilizing module includes third current-limiting resistance R3, the 4th current-limiting resistance
R4, the first triode Q1, the second triode Q2 and voltage stabilizing triode U1, the base stage of the first triode Q1 and the two or three pole
The collector connection of pipe Q2, the base stage connection of the emitter of the first triode Q1 and the second triode Q2, the described 1st
The collector of pole pipe Q1 and the positive output end of power module, the positive input terminal of the power module by third current-limiting resistance R3 with
The base stage of first triode Q1 connects, and is connected by the 4th current-limiting resistance R4 between the emitter and base stage of the second triode Q2
It connects, the emitter of the second triode Q2 is connect with the negative pole end of voltage stabilizing triode U1, the anode of the voltage stabilizing triode U1
End is connect with the negative output terminal of power module, and the reference pole of the voltage stabilizing triode U1 is connect with relay T1.
It is further used as preferred embodiment, the Voltage stabilizing module further includes third voltage-stabiliser tube ZD3, the third voltage stabilizing
The negative pole end of pipe ZD3 is connect with the reference pole of voltage stabilizing triode U1, positive terminal and the voltage stabilizing triode of the third voltage-stabiliser tube ZD3
The positive terminal of U1 connects.Third voltage stabilizing triode ZD3 is for preventing overshoot voltage.
It is further used as preferred embodiment, the model TL431 of the voltage stabilizing triode (U1).
It is further used as preferred embodiment, first metal-oxide-semiconductor (M1) is N-channel MOS pipe.
The operation principle of the entire circuit of the present invention is：When power module is that 48V powers, the first voltage-stabiliser tube ZD1 conductings, the
One metal-oxide-semiconductor M1 conductings, POE Power over Ethernet connecting pin are connected with ground, and POE Power over Ethernet functions are normal；Another third transistor
Q3 is connected, and the 4th triode Q4 is closed, and relay K1 is closed, and default connection to 48V turns 12V power conversion modules, gives Main
Broad signal main board power supplies.Whole system works as PSE interchangers at this time.When power module is that 12V powers, first is steady
Pressure pipe ZD1 is not turned on, and the first metal-oxide-semiconductor M1 is closed, and POE Power over Ethernet connecting pin connection ground disconnects, the connection of POE Power over Ethernet
Function is held to close；In addition third transistor Q3 is not turned on, the 4th triode Q4 conductings, the first triode Q1, the second triode Q2
Push-pull configuration can be reinforced feeding back, and voltage stabilizing triode U1 stabilizing low voltage relay working voltages, third voltage-stabiliser tube ZD3 is made to prevent from overshooting
Voltage, K1 relays work switching circuit, power supply are directly connected to the power supply of main signal plate, and whole system closes POE functions at this time
It works as general switch.
It is to be illustrated to the preferable implementation of the present invention, but the invention is not limited to the implementation above
Example, those skilled in the art can also make various equivalent variations or be replaced under the premise of without prejudice to spirit of that invention
It changes, these equivalent deformations or replacement are all contained in the application claim limited range.
Claims (7)
1. a kind of voltage commutation circuit applied to PSE interchangers, it is characterised in that：It includes power module, first switch control
Molding block, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power conversion modules and
Main Broad signal mainboards；
The power module is connect by first switch control module with poe Power over Ethernet modules；
The power module is connect with second switch control module, and the second switch control module turns the conversion of 12V power supplys with 48V
Module connects, and the 48V turns 12V power conversion modules and connect with Main Broad signal mainboards, and the second switch controls mould
Block is connect with Main Broad signal mainboards；
The first switch control module is connect with second switch control module, the Voltage stabilizing module and second switch control module
Connection, the power module are connect with Voltage stabilizing module.
2. the voltage commutation circuit according to claim 1 applied to PSE interchangers, it is characterised in that：Described first opens
It closes control module and includes the first current-limiting resistance, the first voltage-stabiliser tube, the first metal-oxide-semiconductor and the second voltage-stabiliser tube, the power module
Positive output end is connect by first resistor with the negative pole end of the first voltage-stabiliser tube, the positive terminal and the first MOS of first voltage-stabiliser tube
The grid of pipe connects, and the source electrode of first metal-oxide-semiconductor is connect with poe Power over Ethernet modules, the drain electrode of first metal-oxide-semiconductor and
The negative output terminal of power module connects, and the positive terminal of second voltage-stabiliser tube and the negative output terminal of power module connect, and described the
The negative pole end of two voltage-stabiliser tubes is connect with the positive terminal of the first voltage-stabiliser tube.
3. the voltage commutation circuit according to claim 2 applied to PSE interchangers, it is characterised in that：Described first
Metal-oxide-semiconductor is N-channel MOS pipe.
4. the voltage commutation circuit according to claim 1 applied to PSE interchangers, it is characterised in that：Described second
Switch control module includes：Third transistor, the 4th triode and relay, the base stage of the third transistor and the first voltage stabilizing
The positive terminal of pipe connects, and the emitter of the third transistor and the negative output terminal of power module connect, the third transistor
Collector connect with the base stage of the 4th triode, the positive output end of the collector of the 4th triode and power module connects
It connects, the emitter of the 4th triode is connect with relay.
5. the voltage commutation circuit according to claim 1 applied to PSE interchangers, it is characterised in that：The voltage stabilizing mould
Block includes third current-limiting resistance, the 4th current-limiting resistance, the first triode, the second triode and voltage stabilizing triode, and described first
The base stage of triode connects with the collector of the second triode, the base stage of the emitter and the second triode of first triode
Connection, the positive output end of the collector and power module of first triode, the positive output end of the power module pass through the
Three current-limiting resistances are connect with the base stage of the first triode, pass through the 4th current limliting between the emitter and base stage of second triode
Resistance connects, and the emitter of second triode is connect with the negative pole end of voltage stabilizing triode, the anode of the voltage stabilizing triode
End is connect with the negative output terminal of power module, and the reference pole of the voltage stabilizing triode is connect with relay.
6. the voltage commutation circuit according to claim 5 applied to PSE interchangers, it is characterised in that：The voltage stabilizing mould
Block further includes third voltage-stabiliser tube, and the negative pole end of the third voltage-stabiliser tube is connect with the reference pole of voltage stabilizing triode, and the third is steady
The positive terminal of pressure pipe is connect with the positive terminal of voltage stabilizing triode.
7. being applied to the voltage commutation circuit of PSE interchangers according to claim 5 to 6 any one of them, it is characterised in that：Institute
The model TL431 for the voltage stabilizing triode stated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053646.5A CN105515559B (en) | 2016-01-26 | 2016-01-26 | A kind of voltage commutation circuit applied to PSE interchangers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610053646.5A CN105515559B (en) | 2016-01-26 | 2016-01-26 | A kind of voltage commutation circuit applied to PSE interchangers |
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| Publication Number | Publication Date |
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| CN105515559A CN105515559A (en) | 2016-04-20 |
| CN105515559B true CN105515559B (en) | 2018-09-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610053646.5A Active CN105515559B (en) | 2016-01-26 | 2016-01-26 | A kind of voltage commutation circuit applied to PSE interchangers |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792184B (en) * | 2016-11-16 | 2021-11-09 | 青岛海信宽带多媒体技术有限公司 | Set top box and set top box power supply adjusting method |
| EP3367210A1 (en) * | 2017-02-24 | 2018-08-29 | Thomson Licensing | Method for operating a device and corresponding device, system, computer readable program product and computer readable storage medium |
| CN109799894A (en) * | 2019-01-30 | 2019-05-24 | 郑州云海信息技术有限公司 | A kind of Power conversion board and power supply transfer method of compatible 12V and 48V |
| CN114465831B (en) * | 2020-11-10 | 2023-05-16 | 启碁科技股份有限公司 | Power over Ethernet device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202111716U (en) * | 2010-11-24 | 2012-01-11 | 醴陵恒茂电子科技有限公司 | Power over ethernet device and power over ethernet network |
| CN104038350A (en) * | 2014-05-12 | 2014-09-10 | 东莞市钜佳电子有限公司 | Ethernet backup power supply module, device and system |
| EP2953292A1 (en) * | 2013-03-06 | 2015-12-09 | Huawei Technologies Co., Ltd. | Power supply circuit and power supply panel |
| CN205545187U (en) * | 2016-01-26 | 2016-08-31 | 深圳市共进电子股份有限公司 | Be applied to voltage switching circuit of PSE switch |
-
2016
- 2016-01-26 CN CN201610053646.5A patent/CN105515559B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202111716U (en) * | 2010-11-24 | 2012-01-11 | 醴陵恒茂电子科技有限公司 | Power over ethernet device and power over ethernet network |
| EP2953292A1 (en) * | 2013-03-06 | 2015-12-09 | Huawei Technologies Co., Ltd. | Power supply circuit and power supply panel |
| CN104038350A (en) * | 2014-05-12 | 2014-09-10 | 东莞市钜佳电子有限公司 | Ethernet backup power supply module, device and system |
| CN205545187U (en) * | 2016-01-26 | 2016-08-31 | 深圳市共进电子股份有限公司 | Be applied to voltage switching circuit of PSE switch |
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| CN105515559A (en) | 2016-04-20 |
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