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TPS23751 Datasheet(PDF) 6 Page - Texas Instruments |
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TPS23751 Datasheet(HTML) 6 Page - Texas Instruments |
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6 / 47 page  TPS23751 TPS23752 SLVSB97A – JULY 2012 – REVISED AUGUST 2012 www.ti.com PoE INTERFACE SECTION Unless otherwise noted, VVC = VAPD = VCS = VARTN = VRTN. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT DEN (DETECTION AND ENABLE) DEN open, IVDD + IDEN + IRTN, VVDD = 10.1 V, not in Bias current 3.0 5.0 12.0 µA mark DEN leakage current VDEN = VVDD = 57 V 0.1 5.0 µA IVDD + IDEN + IRTN, VVDD = 1.4 V 53.8 56.5 58.3 Detection current µA IVDD + IDEN + IRTN, VVDD = 10.1 V 395 410 417 Disable threshold DEN falling 3.0 3.6 5.0 V VPD_DIS Hysteresis(1) 50 113 200 mV CLS (CLASSIFICATION) 13 V ≤ VVDD ≤ 21 V, Measure IVDD + IDEN + IRTN RCLS = 1270 Ω 1.80 2.17 2.60 RCLS = 243 Ω 9.90 10.60 11.20 ICLS Classification current mA RCLS = 137 Ω 17.60 18.60 19.40 RCLS = 90.9 Ω 26.50 27.90 29.30 RCLS = 63.4 Ω 38.00 39.90 42.00 VVDD rising, VCLS ↑ 11.9 12.5 13.0 VCL_ON Class lower threshold V VCL_H Hysteresis(1) 1.4 1.6 1.7 VVDD rising, VCLS ↓ 21.0 22.0 23.0 VCU_OFF Class upper threshold V VCU_H Hysteresis(1) 0.50 0.75 0.90 VMSR Mark reset threshold VVDD falling 3.0 3.9 5.0 V Mark state resistance 2-point measurement at 5 V and 10.1 V 6.0 9.1 12.0 k Ω Leakage current VVDD = 57 V, VCLS = 0 V, measure ICLS 1 µA RTN (PASS DEVICE) rDS(on) (1) On resistance VVC = VAPD = VARTN = VCS = VVDD 0.20 0.45 0.75 Ω VVC = VAPD = VARTN = VCS = VVDD, VRTN =1.5 V, Current limit 0.85 1.00 1.20 A Measure IRTN VVC = VAPD = VARTN = VCS = VDD, VRTN = 2 V, VDD = Inrush current 100 140 180 mA 20 V → 48 V Inrush termination Percentage of inrush current 80% 90% 99% Foldback threshold VRTN ↑ 11.0 12.3 13.6 V VRTN rising to when current limit changes to inrush Foldback deglitch time(1) 500 800 1500 µs current limit Input bias current VVDD = VRTN = 30 V, Measure IRTN 30 µA RTN leakage current VRTN = VVDD = 100 V, VDEN = VVSS 50 µA T2P (TYPE 2 PSE INDICATION) IT2P = 2 mA, after 2-event classification and softstart is complete, VT2P Output low voltage 0.26 0.60 V VVC = 12 V, VCTL = 3 V, VARTN = VVSS VCTL = 3 V, VAPD = 2 V, Measure from switching start tT2P T2P startup delay 2.0 4.3 7.0 ms to VT2P ↓ Leakage current VT2P = 18 V, VARTN = VVSS 10 µA (1) Parameters provided for reference only, and do not constitute part of TI published specifications for purposes of TI product warranty. 6 Submit Documentation Feedback Copyright © 2012, Texas Instruments Incorporated Product Folder Links: TPS23751 TPS23752 |
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