| 전자부품 데이터시트 검색엔진 |
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AN2783 데이터시트(PDF) 42 Page - STMicroelectronics |
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AN2783 데이터시트(HTML) 42 Page - STMicroelectronics |
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42 / 47 page ![]() Test results AN2783 42/47 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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