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ADM1278-2ACPZ-RL Arkusz danych(PDF) 5 Page - Analog Devices |
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ADM1278-2ACPZ-RL Arkusz danych(HTML) 5 Page - Analog Devices |
5 / 61 page Data Sheet ADM1278 Parameter1 Symbol Min Typ Max Unit Test Conditions/Comments HOT SWAP SENSE VOLTAGE Hot Swap Sense Voltage Current Limit VSENSECL A Grade and AA Grade 19.75 20 20.25 mV VISET > 1.65 V; VGATE = (VHS+ + 3 V); IGATE = 0 μA B Grade Only 19.6 20 20.4 mV VISET > 1.65 V; VGATE = (VHS+ + 3 V); IGATE = 0 μA Constant Power Inactive VGATE = (VHS+ + 3 V); IGATE = 0 μA; VDS = (HS−) − VOUT A Grade and AA Grade 24.75 25 25.25 mV VISET = 1.25 V; VDS < 2 V 19.75 20 20.25 mV VISET = 1.0 V; VDS < 2 V 14.75 15 15.25 mV VISET = 0.75 V; VDS < 2 V B Grade Only 24.6 25 25.4 mV VISET = 1.25 V; VDS < 2 V 19.6 20 20.4 mV VISET = 1.0 V; VDS < 2 V 14.6 15 15.4 mV VISET = 0.75 V; VDS < 2V Constant Power Active FET power limit = (VPSET × 8)/(50 × RSENSE); constant power active when VDS > (VPSET × 8)/ISET A Grade and AA Grade 9.25 10 10.75 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 4 V 4.65 5 5.35 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 8 V 1.7 2 2.3 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 20 V B Grade Only 9 10 11 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 4 V 4.6 5 5.4 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 8 V 1.4 2 2.6 mV VISET > 1.65 V; VPSET = 0.25 V; VDS = 20 V Start-Up Current Limit VISTARTCL A Grade and AA Grade 4.7 5 5.3 mV STRT_UP_IOUT_LIM = 3; VISET > 1.65 V 3.7 4 4.3 mV VISTART = 0.2 V B Grade Only 4.5 5 5.5 mV STRT_UP_IOUT_LIM = 3; VISET > 1.65 V 3.5 4 4.5 mV VISTART = 0.2 V Start-Up Current-Limit Clamp VISTARTCL_CLAMP A Grade and AA Grade 1.6 2 2.4 mV VISTART = 0 V or STRT_UP_IOUT_LIM = 0 B Grade Only 1.4 2 2.6 mV VISTART = 0 V or STRT_UP_IOUT_LIM = 0 Circuit Breaker Offset VCBOS 0.6 0.88 1.12 mV Circuit breaker trip voltage, VCB = VSENSECL − VCBOS SEVERE OVERCURRENT Voltage Threshold VSENSEOC A Grade and AA Grade 23 25 27 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (125%) 28 30 32 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (150%) 38 40 42 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (200%) 43 45 47 mV VISET > 1.65 V; VPSET > 1.1 V; default at power-up (225%) B Grade Only 20 25 30 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (125%) 25 30 35 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (150%) 35 40 45 mV VISET > 1.65 V; VPSET > 1.1 V; optional select PMBus (200%) 40 45 50 mV VISET > 1.65 V; VPSET > 1.1 V; default at power-up (225%) Short Glitch Filter Duration 100 220 ns VSENSE_HS step = 18 mV to (2 mV above VSENSEOC_MAX) Long Glitch Filter Duration (Default) 530 900 ns VSENSE_HS step = 18 mV to (2 mV above VSENSEOC_MAX) Response Time Short Glitch Filter 200 320 ns VSENSE_HS step = 18 mV to (2 mV above VSENSEOC_MAX) Long Glitch Filter 630 1000 ns VSENSE_HS step = 18 mV to (2 mV above VSENSEOC_MAX) ISTART PIN Active Range 0.1 1.25 V Tie ISTART to VCAP to disable start-up current limit Gain of Current Sense Amplifier AVCSAMP 50 V/V Accuracies included in total sense voltage accuracies Input Current IISTART 100 nA VISTART ≤ VVCAP TIMER PIN TIMER Pull-Up Current Power-On Reset (POR) ITIMERUPPOR −2 −3 −4 µA Initial power-on reset; VTIMER = 0.5 V Overcurrent (OC) Fault ITIMERUPFLT −57 −60 −63 µA Overcurrent fault; 0.2 V ≤ VTIMER ≤ 1 V Rev. A | Page 5 of 61 |
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