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SI3462-E01 Datasheet(PDF) 7 Page - List of Unclassifed Manufacturers |
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SI3462-E01 Datasheet(HTML) 7 Page - List of Unclassifed Manufacturers |
7 / 24 page Si3462 Rev. 1.0 7 Classification Current Region ICLASS_REGION Class 0 0 — 5 mA Class 1 8 — 13 mA Class 2 16 — 21 mA Class 3 25 — 31 mA Class 4 35 — 45 mA Mark Voltage6 VMARK 78.5 10 V Mark Current6 IMARK_LIM Short circuit — — 9 mA Protection and Current Control Overload Current Threshold2,3 ICUT Class 0 and Class 4 PoE 15,400/VOUT 16,170/VOUT 17,600/VOUT mA Class 1 4,000/VOUT 4,200/VOUT 4,600/VOUT mA Class 2 7,000/VOUT 7,350/VOUT 8,000/VOUT mA Class 3 15,400/VOUT 16,170/VOUT 17,600/VOUT mA Class 4 PoE+ 30,000/VOUT 31,500/VOUT 34,200/VOUT mA Overload Current Limit4 ILIM Class 0/1/2/3 and Class 4 PoE; Output = 100 across VOUT 400 425 450 mA ILIM PoE+ Class 4 PoE+; Output = 50 across VOUT 684 750 825 mA Overload Time TLIM Class 0/1/2/3 and Class 4 PoE; Output = 100 across VOUT 50 60 75 ms Class 4 PoE+; Output = 50 across V OUT 14 17 20 ms Disconnect Current IMIN Disconnect current 5 7.5 10 mA Efficiency System Efficiency (PIN @ VIN) to (POUT @ VOUT) — 93 — % Table 3. Selected Electrical Specifications (Si3462-EVB) (Continued) Description Symbol Test Conditions Min Typ1 Max Unit Notes: 1. Typical specifications are based on an ambient operating temperature of 25 °C and VIN = +50 V unless otherwise specified. 2. Absolute classification current limits are configurable. See “5.2. Classification” and "5.3. Power-Up" on page 14. 3. Typical ICUT values are adjusted according to the input voltage to provide power limiting with approximately 5% margin against the 802.3 requirements. The maximum ICUT values are consistent with the IEEE requirement that Icut maximum is less than 400 mA at the minimum allowed Vout of 44 V or 684 mA for PoE+ mode at the minimum allowed Vout of 50 V. 4. Overload current is within limits, typically in less than 1 ms. 5. Classification is optional in some operating modes. Refer to Table 6 for operating modes. 6. Classification Mark is only required for Type 2/Class 4 support |
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