CN105515559A - Voltage switching circuit applied to PSE switch - Google Patents
Voltage switching circuit applied to PSE switch Download PDFInfo
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- CN105515559A CN105515559A CN201610053646.5A CN201610053646A CN105515559A CN 105515559 A CN105515559 A CN 105515559A CN 201610053646 A CN201610053646 A CN 201610053646A CN 105515559 A CN105515559 A CN 105515559A
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- triode
- voltage
- module
- power
- stabiliser tube
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- 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
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- 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 voltage switching circuit applied to a PSE switch. The voltage switching circuit comprises a power module, a first switch control module, a power-over-Ethernet (poe) module, a voltage stabilizing module, a second switch control module, a 48 V-to-12 V power switching module and a Main Board signal main board. By means of the voltage switching circuit applied to the PSE switch, power supply modes are automatically switched according to input of different power adapters on the basis that the specific performance of products is not affected, so that the compatibility and practicability of the switch are improved, the power loss of the switch is reduced, and thus the switch can be applied more widely. The voltage switching circuit applied to the PSE switch is widely suitable for the poe technical field.
Description
Technical field
The present invention relates to Power over Ethernet poe technical field, particularly relate to a kind of voltage commutation circuit being applied to PSE switch.
Background technology
POE is also referred to as the electric power system (POL based on local area network (LAN), or active Ethernet (ActiveEthernet) PoweroverLAN), sometimes also Power over Ethernet is called for short, this is the newest standards specification transmitting data and electrical power while of utilizing existing standard Ethernet transmission cable, and maintains the compatibility with existing Ethernet system and user.PSE (PowerSourcingEquipment) refers to the equipment of powering for ethernet client equipment.IEEE802.3af standard is the new standard based on Power over Ethernet system POE, and it adds the relevant criterion of directly being powered by netting twine on the basis of IEEE802.3, is the expansion of existing ethernet standard, is also first international standard about power distribution.
Communications industry development is more and more faster, and some small-sized PSE switches adopt outside 48V power supply adaptor to access, by internal circuit supply Ethernet interface 48V function of supplying power.But sometimes just need to carry out work as a simple switch, the power supply adaptor of general switch is all 12V.If gone to use as general switch by PSE switch, likely cause the exception of common access device, and power also there is waste.
Summary of the invention
In order to solve the problems of the technologies described above, the object of this invention is to provide a kind of compatibility, the practicality that improve switch, reduce the voltage commutation circuit being applied to PSE switch of switch power loss.
The technical solution adopted in the present invention is: a kind of voltage commutation circuit being applied to PSE switch, and it comprises power module, the first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power transfer module and MainBroad signal mainboard; Described power module is by the first switch control module and poe Power over Ethernet model calling; Described power module is connected with second switch control module, described second switch control module and 48V turn 12V power transfer module and are connected, described 48V turns 12V power transfer module and is connected with MainBroad signal mainboard, and described second switch control module is connected with MainBroad signal mainboard; Described first switch control module is connected with second switch control module, and described Voltage stabilizing module is connected with second switch control module, and described power module is connected with Voltage stabilizing module.
Further, described first switch control module comprises the first current-limiting resistance, first voltage-stabiliser tube, first metal-oxide-semiconductor and the second voltage-stabiliser tube, the positive output end of described power module is connected with the negative pole end of the first voltage-stabiliser tube by the first resistance, described first voltage-stabiliser tube positive terminal be connected with the grid of the first metal-oxide-semiconductor, the source electrode of described first metal-oxide-semiconductor and poe Power over Ethernet model calling, the described drain electrode of the first metal-oxide-semiconductor is connected with the negative output terminal of power module, the described positive terminal of the second voltage-stabiliser tube is connected with the negative output terminal of power module, the negative pole end of described second voltage-stabiliser tube is connected with the positive terminal of the first voltage-stabiliser tube.
Further, the first described metal-oxide-semiconductor is N-channel MOS pipe.
Further, described second switch control module comprises: the 3rd triode, the 4th triode and relay, the base stage of described 3rd triode is connected with the positive terminal of the first voltage-stabiliser tube, the emitter of described 3rd triode is connected with the negative output terminal of power module, the collector electrode of described 3rd triode is connected with the base stage of the 4th triode, the collector electrode of described 4th triode is connected with the positive output end of power module, and the emitter of described 4th triode is connected with relay.
Further, described Voltage stabilizing module comprises the 3rd current-limiting resistance, 4th current-limiting resistance, first triode, second triode and voltage stabilizing triode, the base stage of described first triode is connected with the collector electrode of the second triode, the emitter of described first triode is connected with the base stage of the second triode, the described collector electrode of the first triode and the positive output end of power module, the positive input terminal of described power module is connected with the base stage of the first triode by the 3rd current-limiting resistance, the emitter of described second triode is connected by the 4th current-limiting resistance with between base stage, the emitter of described second triode is connected with the negative pole end of voltage stabilizing triode, the described positive terminal of voltage stabilizing triode is connected with the negative output terminal of power module, the reference pole of described voltage stabilizing triode is connected with relay.
Further, described Voltage stabilizing module also comprises the 3rd voltage-stabiliser tube, and the described negative pole end of the 3rd voltage-stabiliser tube is connected with the reference pole of voltage stabilizing triode, and the positive terminal of described 3rd voltage-stabiliser tube is connected with the positive terminal of voltage stabilizing triode.
Further, the model of described voltage-stabiliser tube triode is TL431.
The invention has the beneficial effects as follows: the present invention is provided with the first switch control module, second switch control module and 48V and turns 12V power transfer module, when 48V plant-grid connection, power supply is supplied to poe Power over Ethernet module, is supplied to Ethernet POE equipment and powers; 48V power supply turns 12V power transfer module by 48V and turns 12V and be supplied to MainBroad signal main board power supply in addition.When 12V plant-grid connection, power supply is not poe Power over Ethernet module for power supply, and power supply is directly MainBroad signal main board power supply in addition.The present invention is according to the input of different electrical power adapter, and automatic switchover powering mode, improves the compatibility of switch, practicality, reduces switch power loss, makes its application more extensive.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
Fig. 1 is high-level schematic functional block diagram of the present invention;
Fig. 2 is circuit theory diagrams of the present invention.
Embodiment
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.
As shown in Figure 1 to Figure 2, be applied to a voltage commutation circuit for PSE switch, it comprises power module, the first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power transfer module and MainBroad signal mainboard; Described power module is by the first switch control module and poe Power over Ethernet model calling; Described power module is connected with second switch control module, described second switch control module and 48V turn 12V power transfer module and are connected, described 48V turns 12V power transfer module and is connected with MainBroad signal mainboard, and described second switch control module is connected with MainBroad signal mainboard; Described first switch control module is connected with second switch control module, and described Voltage stabilizing module is connected with second switch control module, and described power module is connected with Voltage stabilizing module.
Its operation principle is: described power module is whole circuit supply, and when 48V plant-grid connection, power supply is supplied to poe Power over Ethernet module, is supplied to Ethernet POE equipment and powers; 48V power supply turns 12V power transfer module by 48V and turns 12V and be supplied to MainBroad signal main board power supply in addition.When 12V plant-grid connection, power supply is not poe Power over Ethernet module for power supply, and power supply is directly MainBroad signal main board power supply in addition.Whether described first switch control module is poe Power over Ethernet module for power supply for controlling power supply, and for controlling power supply, whether to turn 12V power transfer module by 48V be MainBroad signal main board power supply to described first switch control module.Described Voltage stabilizing module for make second switch control module at stable operating at voltages.
Be further used as preferred embodiment, described first switch control module comprises the first current-limiting resistance R1, first voltage-stabiliser tube ZD1, first metal-oxide-semiconductor M1 and the second voltage-stabiliser tube ZD2, the positive output end of described power module is connected with the negative pole end of the first voltage-stabiliser tube ZD1 by the first current-limiting resistance R1, the positive terminal of described first voltage-stabiliser tube ZD1 is connected with the grid of the first metal-oxide-semiconductor M1, the source electrode of described first metal-oxide-semiconductor M1 and poe Power over Ethernet model calling, the drain electrode of described first metal-oxide-semiconductor M1 is connected with the negative output terminal of power module, the positive terminal of described second voltage-stabiliser tube ZD2 is connected with the negative output terminal of power module, the negative pole end of described second voltage-stabiliser tube ZD2 is connected with the positive terminal of the first voltage-stabiliser tube ZD1.
Be further used as preferred embodiment, described second switch control module comprises: the 3rd triode Q3, the 4th triode Q4 and relay K 1, the base stage of described 3rd triode Q3 is connected with the positive terminal of the first voltage-stabiliser tube ZD1, the emitter of described 3rd triode Q3 is connected with the negative output terminal of power module, the collector electrode of described 3rd triode Q3 is connected with the base stage of the 4th triode Q4, the collector electrode of described 4th triode Q4 is connected with the positive output end of power module, and the emitter of described 4th triode Q4 is connected with relay K 1.
Be further used as preferred embodiment, described Voltage stabilizing module comprises the 3rd current-limiting resistance R3, 4th current-limiting resistance R4, first triode Q1, second triode Q2 and voltage stabilizing triode U1, the base stage of described first triode Q1 is connected with the collector electrode of the second triode Q2, the emitter of described first triode Q1 is connected with the base stage of the second triode Q2, the described collector electrode of the first triode Q1 and the positive output end of power module, the positive input terminal of described power module is connected with the base stage of the first triode Q1 by the 3rd current-limiting resistance R3, the emitter of described second triode Q2 is connected by the 4th current-limiting resistance R4 with between base stage, the emitter of described second triode Q2 is connected with the negative pole end of voltage stabilizing triode U1, the positive terminal of described voltage stabilizing triode U1 is connected with the negative output terminal of power module, the reference pole of described voltage stabilizing triode U1 is connected with relay T1.
Be further used as preferred embodiment, described Voltage stabilizing module also comprises the 3rd voltage-stabiliser tube ZD3, the negative pole end of described 3rd voltage-stabiliser tube ZD3 is connected with the reference pole of voltage stabilizing triode U1, and the positive terminal of described 3rd voltage-stabiliser tube ZD3 is connected with the positive terminal of voltage stabilizing triode U1.3rd voltage stabilizing triode ZD3 is used for preventing overshoot voltage.
Be further used as preferred embodiment, the model of described voltage-stabiliser tube triode (U1) is TL431.
Be further used as preferred embodiment, described the first metal-oxide-semiconductor (M1) is N-channel MOS pipe.
The operation principle of the whole circuit of the present invention is: when power module be 48V power time, the first voltage-stabiliser tube ZD1 conducting, the first metal-oxide-semiconductor M1 conducting, POE Power over Ethernet link with ground conducting, POE Power over Ethernet function is normal; Another 3rd triode Q3 conducting, the 4th triode Q4 closes, and relay K 1 is closed, and acquiescence is connected to 48V and turns 12V power transfer module, to MainBroad signal main board power supply.Now whole system works as PSE switch.When power module be 12V power time, the first voltage-stabiliser tube ZD1 not conducting, the first metal-oxide-semiconductor M1 closes, POE Power over Ethernet link connect ground disconnect, POE Power over Ethernet link function close; Other 3rd triode Q3 not conducting, 4th triode Q4 conducting, first triode Q1, the second triode Q2 push-pull configuration can strengthen feedback, make voltage stabilizing triode U1 stabilizing low voltage relay working voltage, 3rd voltage-stabiliser tube ZD3 prevents overshoot voltage, K1 relay work commutation circuit, power supply directly connects main signal plate and powers, and now whole system closes POE function as general switch work.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent distortion or replacement are all included in the application's claim limited range.
Claims (7)
1. be applied to a voltage commutation circuit for PSE switch, it is characterized in that: it comprises power module, the first switch control module, poe Power over Ethernet module, Voltage stabilizing module, second switch control module, 48V turn 12V power transfer module and MainBroad signal mainboard;
Described power module is by the first switch control module and poe Power over Ethernet model calling;
Described power module is connected with second switch control module, described second switch control module and 48V turn 12V power transfer module and are connected, described 48V turns 12V power transfer module and is connected with MainBroad signal mainboard, and described second switch control module is connected with MainBroad signal mainboard;
Described first switch control module is connected with second switch control module, and described Voltage stabilizing module is connected with second switch control module, and described power module is connected with Voltage stabilizing module.
2. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described first switch control module comprises the first current-limiting resistance, first voltage-stabiliser tube, first metal-oxide-semiconductor and the second voltage-stabiliser tube, the positive output end of described power module is connected with the negative pole end of the first voltage-stabiliser tube by the first resistance, described first voltage-stabiliser tube positive terminal be connected with the grid of the first metal-oxide-semiconductor, the source electrode of described first metal-oxide-semiconductor and poe Power over Ethernet model calling, the described drain electrode of the first metal-oxide-semiconductor is connected with the negative output terminal of power module, the described positive terminal of the second voltage-stabiliser tube is connected with the negative output terminal of power module, the negative pole end of described second voltage-stabiliser tube and the positive terminal of the first voltage-stabiliser tube connect
Connect.
3. the voltage commutation circuit being applied to PSE switch according to claim 2, is characterized in that: the first described metal-oxide-semiconductor is N-channel MOS pipe.
4. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described second switch control module comprises: the 3rd triode, the 4th triode and relay, the base stage of described 3rd triode is connected with the positive terminal of the first voltage-stabiliser tube, the emitter of described 3rd triode is connected with the negative output terminal of power module, the collector electrode of described 3rd triode is connected with the base stage of the 4th triode, the collector electrode of described 4th triode is connected with the positive output end of power module, and the emitter of described 4th triode is connected with relay.
5. the voltage commutation circuit being applied to PSE switch according to claim 1, it is characterized in that: described Voltage stabilizing module comprises the 3rd current-limiting resistance, 4th current-limiting resistance, first triode, second triode and voltage stabilizing triode, the base stage of described first triode is connected with the collector electrode of the second triode, the emitter of described first triode is connected with the base stage of the second triode, the described collector electrode of the first triode and the positive output end of power module, the positive input terminal of described power module is connected with the base stage of the first triode by the 3rd current-limiting resistance, the emitter of described second triode is connected by the 4th current-limiting resistance with between base stage, the emitter of described second triode is connected with the negative pole end of voltage stabilizing triode, the described positive terminal of voltage stabilizing triode is connected with the negative output terminal of power module, the reference pole of described voltage stabilizing triode is connected with relay.
6. the voltage commutation circuit being applied to PSE switch according to claim 5, it is characterized in that: described Voltage stabilizing module also comprises the 3rd voltage-stabiliser tube, the described negative pole end of the 3rd voltage-stabiliser tube is connected with the reference pole of voltage stabilizing triode, and the positive terminal of described 3rd voltage-stabiliser tube is connected with the positive terminal of voltage stabilizing triode.
7. the voltage commutation circuit being applied to PSE switch according to any one of claim 5 to 6, is characterized in that: the model of described voltage-stabiliser tube triode is TL431.
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 |
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| 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 true CN105515559A (en) | 2016-04-20 |
| CN105515559B CN105515559B (en) | 2018-09-14 |
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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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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792184A (en) * | 2016-11-16 | 2017-05-31 | 青岛海信宽带多媒体技术有限公司 | A kind of Set Top Box and Set Top Box are powered method of adjustment |
| CN108632664A (en) * | 2017-02-24 | 2018-10-09 | 汤姆逊许可公司 | Operate the method and corresponding equipment, system, computer-readable program product and computer readable storage medium of equipment |
| 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 |
| CN114465831A (en) * | 2020-11-10 | 2022-05-10 | 启碁科技股份有限公司 | Ethernet power supply device |
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| 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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| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106792184A (en) * | 2016-11-16 | 2017-05-31 | 青岛海信宽带多媒体技术有限公司 | A kind of Set Top Box and Set Top Box are powered method of adjustment |
| 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 |
| CN108632664A (en) * | 2017-02-24 | 2018-10-09 | 汤姆逊许可公司 | Operate the method and corresponding equipment, system, computer-readable program product and computer readable storage medium of equipment |
| 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 |
| CN114465831A (en) * | 2020-11-10 | 2022-05-10 | 启碁科技股份有限公司 | Ethernet power supply device |
| 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 | Publication date |
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| CN105515559B (en) | 2018-09-14 |
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