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TPS51123ARGER Fiches technique(PDF) 5 Page - Texas Instruments |
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TPS51123ARGER Fiches technique(HTML) 5 Page - Texas Instruments |
5 / 36 page TPS51123A www.ti.com SLUSAA6B – APRIL 2011 – REVISED MARCH 2012 ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, VIN = 12 V (unless otherwise noted) PARAMETER CONDITIONS MIN TYP MAX UNIT OUTPUT DRIVERS Source, VBSTx - DRVHx = 100 mV 4 8 RDRVH DRVH resistance Sink, VDRVHx - LLx = 100 mV 1.5 4 Ω Source, VVREG5 - DRVLx = 100 mV 4 8 RDRVL DRVL resistance Sink, VDRVLx = 100 mV 1.5 4 DRVHx-off to DRVLx-on 10 tD Dead time ns DRVLx-off to DRVHx-on 30 INTERNAL BST DIODE VFBST Forward voltage VVREG5-VBSTx, IF = 10 mA, TA = 25 °C 0.7 0.8 0.9 V IVBSTLK VBST leakage current VBSTx = 34 V, LLx = 28 V, TA = 25 °C 0.1 1 μA DUTY AND FREQUENCY CONTROL tON11 CH1 on time 1 VIN = 12 V, VO1 = 5 V, 200 kHz setting 2080 tON12 CH1 on time 2 VIN = 12 V, VO1 = 5 V, 245 kHz setting 1700 tON13 CH1 on time 3 VIN = 12 V, VO1 = 5 V, 300 kHz setting 1390 tON14 CH1 on time 4 VIN = 12 V, VO1 = 5 V, 365 kHz setting 1140 tON21 CH2 on time 1 VIN = 12 V, VO2 = 3.3 V, 250 kHz setting 1100 ns tON22 CH2 on time 2 VIN = 12 V, VO2 = 3.3 V, 305 kHz setting 900 tON23 CH2 on time 3 VIN = 12 V, VO2 = 3.3 V, 375 kHz setting 730 tON24 CH2 on time 4 VIN = 12 V, VO2 = 3.3 V, 460 kHz setting 600 tON(min) Minimum on time TA = 25 °C 80 tOFF(min) Minimum off time TA = 25 °C 300 SOFT-START tSS Internal SS time Internal soft start 1.1 1.6 2.1 ms POWERGOOD PG in from lower 92.50% 95% 97.50% VTHPG PG threshold PG in from higher 102.50% 105% 107.50% PG hysteresis 2.50% 5% 7.50% IPGMAX PG sink current PGOOD = 0.5 V 5 12 mA tPGDEL PG delay Delay for PG in 350 510 670 μs LOGIC THRESHOLD AND SETTING CONDITIONS Shutdown 0.4 VEN0 EN0 setting voltage V Enable 2.4 IEN0 EN0 current VEN0 = 0.2 V 2 3.5 5 μA Shutdown 0.6 VENC ENC threshold voltage V Enable 2 Shutdown 350 400 450 VEN(trip) TRIP1, TRIP2 threshold mV Hysteresis 10 30 60 200 kHz/250 kHz 1.5 245 kHz/305 kHz 1.9 2.1 VTONSEL TONSEL setting voltage V 300 kHz/375 kHz 2.7 3.6 365 kHz/460 kHz 4.7 Auto skip 1.5 VSKIPSEL SKIPSEL setting voltage PWM only 1.9 2.1 V OOA auto skip 2.7 Copyright © 2011–2012, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s): TPS51123A |
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