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wiki:cmp:pow:poe:start
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POE
Manufacturers
| https://silvertel.com/poe-power-over-ethernet-html/ | Silvertel | POE modules |
| https://www.st.com/en/power-management/power-over-ethernet-ics/products.html | ST | POE ic's |
| https://www.kinet-ic.com/power-over-ethernet/poe-pd-controllers/ | Kinetic (Akros Silicon) | POE ic's |
| https://www.silan.com.cn/en/index.php/product/index/120.html | Silan | POE ic's + many discretes |
| http://www.icplus.com.tw/products?locale=en | ICPLUS | POE PSE, Eth PHY, Eth SW |
| https://www.hasivo.com/ProductInfoCategory?categoryId=174243&PageInfoId=202204 | Hasivo | POE PSE, Eth eq |
| https://www.onsemi.com/products/power-management/poe-powered-devices | Onsemi | POE PD |
| https://www.monolithicpower.com/en/products/power-management/power-over-ethernet/powered-device.html | ||
| https://www.globalspec.com/ds/4375/areaspec/compliance_approvals_ieee_802_3af |
Theory
https://www.newnets.ru/knowledge/19942/
| 2 pair POE | IEEE802.3af (IEEE802.3at Type1) | up to 13W |
| 2 pair POE+ | IEEE802.3at Type2 | up to 30W |
| 4 pair POE | IEEE802.3bt Type3 | up to 60W |
| 4 pair POE | IEEE802.3bt Type4 | up to 100W |
In Power over Ethernet systems, the power sourcing equipment (PSE) senses the Ethernet connection to detect if the powered device (PD) is plugged into the cable termination by applying a small voltage (2.7 V to 10 V) on the Ethernet cable and measures the equivalent resistance in at least two consecutive steps. During this phase, the PD must present a resistance between 23.75 kW and 26.25 kΩ.
Designers can set the current by changing the value of the external resistor according to the following table:
Table 7: Value of the external classification resistor for the different PD classes of power
| Class | PD max. average power (W) | RCLS (Ω) |
|---|---|---|
| 0 | 13 | 2k |
| 1 | 3.84 | 150 |
| 2 | 6.49 | 80.6 |
| 3 | 13 | 51.1 |
| 4 | 25.5 | 35.6 |
PSE - power sourcing equipment
https://svanheule.net/switches/software/poe_management
| https://www.promelec.ru/fs/sources/87/c4/23/4f/aadba2afb62c992aec11755c.pdf | TI | TPS2384 | ic | IEEE 802.3af |
| https://www.promelec.ru/fs/sources/33/34/f0/a0/1826c683f0397e2116244dbc.pdf | TI | TPS23861PWR | ic | IEEE 802.3at |
| https://www.promelec.ru/fs/sources/4a/d2/2c/12/49853a8c4e2fc0896ce9ecd4.pdf | Analog Devices | LTC4263IDEPBF | ic | IEEE 802.3af |
PD - powered device
wiki/cmp/pow/poe/start.1702919667.txt.gz · Последнее изменение: 2023/12/18 17:14 — Roman Abakumov
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