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AN2783 bảng dữ liệu(PDF) 42 Page - STMicroelectronics

tên linh kiện AN2783
Giải thích chi tiết về linh kiện  PM8800 demonstration kit for standard and high power PoE
PDF  47 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
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AN2783 bảng dữ liệu(HTML) 42 Page - STMicroelectronics

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Test results
AN2783
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12.4
IEEE 802.3af compatibility test
Additional tests of compatibility to the IEEE802.3af standard have been done with the
PDA100 PD tester from Sifos Technologies. Results obtained with the 5 V, 2 A standard
board are summarized inTable 5, 6, and 7. All tests have been successfully completed.
Table 5.
Compatibility test at -45 degC
Alt-A MDI
Alt-A MDI-X
Alt-B MDI
Alt-B MDI-X
Det. resistance
25.18 k
Ω
25.16 k
Ω
25.25 k
Ω
25.25 k
Ω
Det. capacitance
0.109 µF
0.092 µF
0.109 µF
0.103 µF
Class. current
1.4 mA
1.4 mA
1.4 mA
1.4 mA
Class result
0
0
0
0
Average power
12.52 W
12.52 W
12.38 W
12.38 W
Max current
266.2 mA
261.6 mA
258.8 mA
258.6 mA
Min current
260.3 mA
260.3 mA
257.4 mA
257.3 mA
Av. current
261.0 mA
260.9 mA
258.0 mA
258.0 mA
Turn-on voltage
40.0 V
40.0 V
40.0 V
40.0 V
Turn-off voltage
33.9 V
33.9 V
33.1 V
33.1 V
Table 6.
Compatibility test at room temperature
Alt-A MDI
Alt-A MDI-X
Alt-B MDI
Alt-B MDI-X
Det. resistance
24.90 k
Ω
24.99 k
Ω
24.95 k
Ω
25.09 k
Ω
Det. capacitance
0.103 µF
0.104 µF
0.104 µF
0.109 µF
Class. current
1.4 mA
1.3 mA
1.3 mA
1.3 mA
Class result
0
0
0
0
Average power
12.53 W
12.53 W
12.34 W
12.34 W
Max current
266.2 mA
262.0 mA
257.7 mA
257.6 mA
Min current
260.7 mA
260.5 mA
256.8 mA
256.8 mA
Average current
261.1 mA
261.2 mA
257.2 mA
257.1 mA
Turn-on voltage
40.0 V
40.0 V
40.0 V
40.0 V
Turn-off voltage
34.2 V
34.1 V
33.1 V
33.0 V
Table 7.
Compatibility test at +85 degC
Alt-A MDI
Alt-A MDI-X
Alt-B MDI
Alt-B MDI-X
Det. resistance
25.47 k
Ω
25.49 k
Ω
25.54 k
Ω
25.57 k
Ω
Det. capacitance
0.114 µF
0.112 µF
0.109 µF
0.103 µF
Class. current
1.3 mA
1.3 mA
1.3 mA
1.3 mA
Class result
0000
Average power
12.59 W
12.59 W
12.36 W
12.37 W



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