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TPS548B22RVFT Fiches technique(PDF) 9 Page - Texas Instruments |
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TPS548B22RVFT Fiches technique(HTML) 9 Page - Texas Instruments |
9 / 45 page 9 TPS548B22 www.ti.com SLUSCE4 – JANUARY 2017 Submit Documentation Feedback Copyright © 2017, Texas Instruments Incorporated (1) Correlated with closed-loop EVM measurement at load current of 20 A. (2) Specified by design. Not production tested. 6.6 Timing Requirements PARAMETER CONDITION MIN NOM MAX UNIT SWITCHING FREQUENCY fSW VO switching frequency(1) VIN = 12 V, VVO = 1 V, TA = 25°C 380 425 475 kHz 585 650 740 790 875 995 950 1050 1250 tON(min) Minimum on time(2) 60 ns tOFF(min) Minimum off time(2) DRVH falling to rising 300 ns 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 ms RMODE_LOW = 53.6 kΩ 4 ms RMODE_LOW = 47.5 kΩ 2 ms RMODE_LOW = 42.2 kΩ 1 ms PGOOD COMPARATOR tPGDLY PGOOD delay time Delay for PGOOD going in 1 ms Delay for PGOOD coming out 2 µs POWER-ON DELAY tPODLY Power-on delay time 1.024 ms PROTECTIONS AND OOB tOVPDLY OVP response time 100-mV over drive 1 µs tUVPDLY UVP delay filter delay time 1 ms tHICDLY Hiccup blanking time tSS = 1 ms 16 ms tSS = 2 ms 24 ms tSS = 4 ms 38 ms tSS = 8 ms 67 ms |
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