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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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TPS40422 Fiches technique(PDF) 5 Page - Texas Instruments |
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TPS40422 Fiches technique(HTML) 5 Page - Texas Instruments |
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5 / 54 page  TPS40422 www.ti.com SLUSAQ4A – OCTOBER 2011 – REVISED DECEMBER 2011 ELECTRICAL CHARACTERISTICS (1) (continued) TJ = –40ºC to 125ºC, VIN = VDD = 12 V, RT set for 500 kHz, all parameters at zero power dissipation (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT SYNCHRONIZATION VSYNCH SYNC high level threshold 2.0 V VSYNCL SYNC low level threshold 0.8 V tSYNC Minimum SYNC pulse width 100 ns fSYNC(max) Maximum SYNC frequency(4) 2000 kHz fSYNC(min) Minimum SYNC frequency(4) 200 SYNC frequency range (increase from nominal –20% 20% oscillator frequency) PWM tOFF(min) Minimum off time 90 100 ns tON(min) Minimum pulse(5) 90 130 ns HDRV off to LDRV on 15 25 30 tDEAD Output driver dead time ns LDRV off to HDRV on 25 35 45 SOFT START Soft-start time Factory default settings 2.4 2.7 3.0 ms tSS Accuracy over range(5) 600 µs ≤ tSS ≤ 9 ms –15% 15% tON(delay) Turn-on delay time(6) Factory default settings 0 ms tOFF(delay) Turn-off delay time Factory default settings 0 ms REMOTE SENSE AMPLIFIER (VSNS1– GSNS1) = 0.6 V –5 5 VDIFFO(err) Error voltage from DIFFO1 to (VSNS1– GSNS1) (VSNS1– GSNS1) = 1.2 V –8 8 mV (VSNS1– GSNS1) = 3.0 V –17 17 BW Closed-loop bandwidth(5) 2 MHz VDIFFO(max) Maximum DIFFOx output voltage VBP6-0.2 V Sourcing 1 IDIFFO mA Sinking 1 DRIVERS RHS(up) High-side driver pull-up resistance (VBOOT–VSW) = 6.5 V, IHS = -40 mA 0.8 1.5 2.5 RHS(dn) High-side driver pull-down resistance (VBOOT–VSW) = 6.5 V, IHS = 40 mA 0.5 1.0 1.5 Ω RLS(up) Low-side driver pull-up resistance ILS = -40 mA 0.8 1.5 2.5 RLS(dn) Low-side driver pull-down resistance ILS = 40 mA 0.35 0.70 1.40 tHS(rise) High-side driver rise time (5) CLOAD = 5 nF 15 tHS(fall) High-side driver fall time (5) CLOAD = 5 nF 12 ns tLS(rise) Low-side driver rise time (5) CLOAD = 5 nF 15 tLS(fall) Low-side driver fall time (5) CLOAD = 5 nF 10 CURRENT SENSING AMPLIFIER VCS(rng) Differential input voltage range VCSxP-VCSxN -60 60 mV VCS(cmr) Input common-mode range 0 VBP6–0.2 V VCS(os) Input offset voltage VCSxP = VCSxN = 0 V -3 3 mV ACS Current sensing gain 15.00 V/V VCS(out) Amplfier output (VCSxP-VCSxN) = 20 mV 270 300 330 mV fC0 Closed-loop bandwidth(5) 3 5 MHz (VCS1P– VCS1N) = (VCS2P–VCS2N) = 20 mV, -5.00% 5.00% TJ = 25°C VCS(chch) Amplifier output difference between CH1, CH2 (VCS1P– VCS1N) = (VCS2P–VCS2N) = 20 mV, -6.67% 6.67% TJ = 85°C (4) When using SYNC, the switching frequency is set to one-half the SYNC frequency. (5) Specified by design. Not production tested. (6) The minimum turn-on delay is 50 µs, when TON_DELAY is set to a factor of zero. Copyright © 2011, Texas Instruments Incorporated Submit Documentation Feedback 5 Product Folder Link(s) :TPS40422 |
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