CN208971539U - A kind of PoE power supply system safety protection circuit - Google Patents
A kind of PoE power supply system safety protection circuit Download PDFInfo
- Publication number
- CN208971539U CN208971539U CN201821701414.7U CN201821701414U CN208971539U CN 208971539 U CN208971539 U CN 208971539U CN 201821701414 U CN201821701414 U CN 201821701414U CN 208971539 U CN208971539 U CN 208971539U
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- Prior art keywords
- diode
- poe
- concatenated
- bidirectional trigger
- power supply
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Abstract
The utility model proposes a kind of PoE power supply system safety protection circuits, the both ends the DC_IN+ and DC_IN- parallel connection first diode unit of DC/DC PoE, second diode and the first bidirectional trigger diode, the end DC_IN+ and PoE_IN- of DC/DC PoE the second bidirectional trigger diode in parallel, third diode and the 4th diode, second bidirectional trigger diode both ends the 5th diode of parallel connection and the 6th diode, the end DC_IN- of DC/DC PoE connects third bidirectional trigger diode, the end PoE_IN- connects the 4th bidirectional trigger diode, first diode unit is concatenated diode D1 and diode D2, second diode is concatenated diode D3 and diode D4, three or two Pole pipe unit is concatenated diode D5 and D6, and the 4th diode is concatenated diode D7 and D8, and the 5th diode is concatenated diode D9 and D10, and the 6th diode is concatenated diode D11 and D12.
Description
Technical field
The utility model belongs to protection circuit field, especially a kind of PoE power supply system safety protection circuit.
Background technique
PoE is the power supply system based on local area network, and PoE eliminates the demand of independent current source and equipment connection power supply line,
The place that equipment is arranged in power outlet is not needed, application is very extensive.
Utility model content
The utility model proposes a kind of PoE power supply system safety protection circuits, the technical solution adopted is as follows:
A kind of PoE power supply system safety protection circuit, the both ends DC_IN+ and DC_IN- of DC/DC PoE the one or two pole in parallel
Pipe unit, the second diode and the first bidirectional trigger diode, the end the DC_IN+ and PoE_IN- parallel connection of DC/DC PoE
Two bidirectional trigger diodes, third diode and the 4th diode, the second bidirectional trigger diode both ends parallel connection
The end DC_IN- of five diodes and the 6th diode, DC/DC PoE connects third bidirectional trigger diode, PoE_
The end IN- connects the 4th bidirectional trigger diode, first diode unit be concatenated diode D1 and diode D2, D1 and D2 it
Between be AC24V_N, the second diode be concatenated diode D3 and diode D4, between D3 and D4 be AC24V_L, third
Diode is concatenated diode D5 and D6, is POE_CT2 between D5 and D6, and the 4th diode is concatenated two pole
Pipe D7 and D8 are POE_CT1 between D7 and D8, and the 5th diode is concatenated diode D9 and D10, between D9 and D10
For POE_CT4, it is POE_CT3 between D11 and D12 that the 6th diode, which is concatenated diode D11 and D12,.
Compared with prior art, the utility model has the beneficial effects that: the utility model proposes safety protection circuit
It is adapted to common DC/DC PoE chip, under the premise of guaranteeing protection effect, the device that safety protection circuit uses is few, cost
It is low.
Detailed description of the invention
Fig. 1 is the circuit-line schematic diagram of the utility model.
Specific embodiment
As shown in Figure 1, constructing safety protection circuit based on the device property of diode and bidirectional trigger diode, safety is anti-
The line construction of protection circuit are as follows: the both ends DC_IN+ and DC_IN- parallel connection first diode unit, the second diode of DC/DC PoE
Unit and the first bidirectional trigger diode, the end DC_IN+ and PoE_IN- of DC/DC PoE the second bidirectional trigger diode in parallel,
Third diode and the 4th diode, the second bidirectional trigger diode both ends parallel connection the 5th diode and the 6th
Diode, the end DC_IN- of DC/DC PoE connect third bidirectional trigger diode, and the end PoE_IN- connects the 4th two-way touching
Diode is sent out, it is AC24V_N between D1 and D2 that first diode unit, which is concatenated diode D1 and diode D2, the two or two
Pole pipe unit is concatenated diode D3 and diode D4, is AC24V_L between D3 and D4, and third diode is concatenated
Diode D5 and D6, between D5 and D6 be POE_CT2, the 4th diode be concatenated diode D7 and D8, D7 and D8 it
Between be POE_CT1, the 5th diode be concatenated diode D9 and D10, between D9 and D10 be POE_CT4, the six or two pole
Pipe unit is concatenated diode D11 and D12, is POE_CT3 between D11 and D12.When work based on AC24V_N, AC24V_L,
POE_CT1, POE_CT2, POE_CT3, POE_CT4 current potential and first diode unit, the second diode, third diode
The height relationship of two terminal potential of unit, corresponding diode current flow realizes protective effect in diode.
In the present embodiment, DC/DC PoE selects TPS2376, and DC_IN+, DC_IN-, PoE_IN- respectively correspond TPS2376
8,5, No. 4 pins.
Technical principle of the utility model has been described above with reference to specific embodiments, these descriptions are intended merely to explain this reality
With novel technical principle, and it cannot be construed to the limitation to scope of protection of the utility model in any way.It is explained based on this,
Those skilled in the art do not need to pay for creative labor other specific embodiment parties that can associate the utility model
Formula all will fall within the protection scope of the utility model.
Claims (1)
1. a kind of PoE power supply system safety protection circuit, which is characterized in that the both ends DC_IN+ and DC_IN- of DC/DC PoE are simultaneously
Join first diode unit, the second diode and the first bidirectional trigger diode, the DC_IN+ and PoE_ of DC/DC PoE
The second bidirectional trigger diode of the end IN- parallel connection, third diode and the 4th diode, the second bidirectional trigger diode
The end DC_IN- of both ends the 5th diode of parallel connection and the 6th diode, DC/DC PoE connects the two-way triggering two of third
Pole pipe, the end PoE_IN- connect the 4th bidirectional trigger diode, and first diode unit is concatenated diode D1 and diode
It is AC24V_N between D2, D1 and D2, the second diode is concatenated diode D3 and diode D4, is between D3 and D4
AC24V_L, third diode are concatenated diode D5 and D6, are POE_CT2, the 4th diode between D5 and D6
It is POE_CT1 between D7 and D8 for concatenated diode D7 and D8, the 5th diode is concatenated diode D9 and D10,
It is POE_CT4 between D9 and D10, it is POE_ between D11 and D12 that the 6th diode, which is concatenated diode D11 and D12,
CT3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821701414.7U CN208971539U (en) | 2018-10-19 | 2018-10-19 | A kind of PoE power supply system safety protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821701414.7U CN208971539U (en) | 2018-10-19 | 2018-10-19 | A kind of PoE power supply system safety protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208971539U true CN208971539U (en) | 2019-06-11 |
Family
ID=66758768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821701414.7U Expired - Fee Related CN208971539U (en) | 2018-10-19 | 2018-10-19 | A kind of PoE power supply system safety protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208971539U (en) |
-
2018
- 2018-10-19 CN CN201821701414.7U patent/CN208971539U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190611 Termination date: 20191019 |