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TPS2384PJDR Datasheet(PDF) 4 Page - Texas Instruments |
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TPS2384PJDR Datasheet(HTML) 4 Page - Texas Instruments |
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4 / 51 page  www.ti.com TPS2384 SLUS634D – NOVEMBER 2004 – REVISED MARCH 2007 ELECTRICAL CHARACTERISTICS (continued) V48 = 48 V, R T = 124 kΩ, CT = 220 pF, CINT = 0.027 µF (low leakage), –40°C to 125°C and TA = TJ (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Port Discovery Port off #P to #N input resistance 400 600 k Ω Discovery open circuit voltage 22 30 Discovery 1 voltage loop control 70 µA < I PORT < 3 mA 2.8 4.4 V Discovery 2 voltage loop control 70 µA < I PORT < 3 mA 8.8 10 Discovery current limit P = N = 48 V 3 4 5 mA Auto-mode discovery resistance 19 26.5 acceptance Band Auto-mode discovery resistance low end 0 15 k Ω rejection Auto-mode discovery resistance high end 33 rejection Discovery1,2 A/D conversion scale factor 100 µA < I PORT < 3 mA 5.30 6.10 6.75 count/ µA Discovery1,2 A/D conversion time IPORT= 120 µA ms Port Classification Classification voltage loop controll 100 µA < I PORT < 50 mA 15 17.5 20 V Classification current limit P = N = 48 V 50 60 100 Class 0 to 1 detection threshold 5.5 6.5 7.5 Class 1 to 2 detection threshold 13 14.5 16 mA Class 2 to 3 detection threshold 21 23 25 Class 3 to 4 detection threshold 31 33 35 Class 4 to 0 detection threshold 45 48 51 Count/m Classification A/D conversion scale factor 375 424 475 A Classification A/D conversion time IPORT = 50 mA 18 22 ms Port Legacy Detection Legacy current limit P = N = 48 V 2.6 3.5 4.3 mA Legacy voltage A/D conversion scale 100 mV < VPORT < 17.5 V 1365 1400 1445 Count/V factor Legacy A/D conversion time 0 V < VPORT < 15 V 18 22 ms Port Powered Mode Port on resistance 20 mA < IPORT < 300 mA 1.3 1.8 Ω Over current threshold (ICUT) 350 375 400 RBIAS = 124 kΩ, CT = 220 pF, –25 ≤ TJ≤ 105 Output current limit (ILIM) 425 450 mA Disconnect timer current threshold RBIAS = 124 kΩ, CT = 220 pF 7.5 10 TMPDO, disconnect detection time RBIAS = 124 kΩ, CT = 220 pF, ILOAD < current threshold 300 400 ms Port output UV 42.0 42.7 44.0 V Port output OV 54 55 56 Over current time out (TOVLD) RBIAS = 124 kΩ, CT = 220 pF 50 75 Short circuit time out (TLIM) RBIAS = 124 kΩ, CT = 220 pF 50 75 ms RBIAS = 124 kΩ, CT = 220 pF, After port enabled and Turn--off delay from UV/OV faults 3 ramped up Count/m Port current A/D conversion scale factor 20 mA < IPORT < 56 V 31 36.41 40 A Port curent A/D conversion time IPORT < 300 mA 18 22 ms Port voltage A/D conversion scale factor 335 353 370 Count/V 45 V < VPORT < 56 V Port voltage A/D conversion time 18 22 ms Port temperature A/D conversion (17500 - counts)/16 °C 4 Submit Documentation Feedback |
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