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TPS548D21 Datasheet(PDF) 7 Page - Texas Instruments |
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TPS548D21 Datasheet(HTML) 7 Page - Texas Instruments |
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7 / 45 page  7 TPS548D21 www.ti.com SLUSCI8 – JULY 2016 Product Folder Links: TPS548D21 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated Electrical Characteristics (continued) over operating free-air temperature range, VVDD = 12V, VEN_UVLO = 5 V (unless otherwise noted) PARAMETER TEST CONDITION MIN TYP MAX UNIT (3) Calculated from 20-A test data. Not production tested. SOFT-START tSS Soft-start time VOUT rising from 0 V to 95% of final set point, RMODE_HIGH = 100 kΩ RMODE_LOW = 60.4 kΩ 8.0 ms RMODE_LOW = 53.6 kΩ 4.0 RMODE_LOW = 47.5 kΩ 2.0 RMODE_LOW = 42.2 kΩ 1.0 POWER-ON DELAY tPODLY Power-on delay time 256 µs PGOOD COMPARATOR VPGTH PGOOD threshold PGOOD in from higher 105 108 111 %VREF 105 108 111 %VREFIN_TRK PGOOD in from lower 89 92 95 %VREF 89 92 95 %VREFIN_TRK PGOOD out to higher 120 %VREF 120 %VREFIN_TRK PGOOD out to lower 68 %VREF 68 %VREFIN_TRK IPG PGOOD sink current VPGOOD = 0.5 V 6.9 mA IPGLK PGOOD leakage current VPGOOD = 5.0 V –1 0 1 μA tPGDLY PGOOD delay time Delay for PGOOD going in 8.192 ms Delay for PGOOD coming out 2 µs CURRENT DETECTION VILM VILIM voltage range On-resistance (RDS(on)) sensing 0.1 1.2 V IOCL_VA Valley current limit threshold RLIM = 130 kΩ 40 A OC tolerance ±10%(3) RLIM = 97.6 kΩ 30 A OC tolerance ±15%(3) RLIM = 64.9 kΩ 20 A OC tolerance ±20% IOCL_VA_N Negative valley current limit threshold RLIM = 130 kΩ –40 A RLIM = 97.6 kΩ –30 RLIM = 64.9 kΩ –20 ICLMP_LO Clamp current at VLIM clamp at lowest VILIM_CLMP = 0.1 V, TA = 25°C 6.25 A ICLMP_HI Clamp current at VLIM clamp at highest VILIM_CLMP = 1.2 V, TA = 25°C 75 A VZC Zero cross detection offset 0 mV |
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