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TPS2490 Fiches technique(PDF) 7 Page - Texas Instruments |
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TPS2490 Fiches technique(HTML) 7 Page - Texas Instruments |
7 / 36 page 7 TPS2490, TPS2491 www.ti.com SLVS503E – NOVEMBER 2003 – REVISED FEBRUARY 2017 Product Folder Links: TPS2490 TPS2491 Submit Documentation Feedback Copyright © 2003–2017, Texas Instruments Incorporated Electrical Characteristics (continued) unless otherwise noted, minimum and maximum limits apply across the recommended operating junction temperature and voltage range, VTIMER = 0 V, and all outputs unloaded; typical specifications are at TJ = 25°C, VVCC = 48 V, VTIMER = 0 V, and all outputs unloaded; positive currents are into pins. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT ENABLE INPUT (EN) VEN_H Threshold, VEN going high 1.32 1.35 1.38 V VEN_L Threshold, VEN going low 1.22 1.25 1.28 V VEN hysteresis 100 mV Leakage current VEN = 48 V 1 µA INPUT SUPPLY UVLO (VCC) VVCC turn on Rising 8.4 8.8 V VVCC turn off Falling 7.5 8.3 V Hysteresis 75 mV 6.6 Switching Characteristics over operating free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT POWER LIMITING AND CURRENT LIMITING (SENSE) tF_TRIP Large overload response time to GATE low VPROG = 4 V, VOUT = VSENSE, V(VCC-SENSE): 0 → 200 mV, C(GATE-OUT) = 2 nF, V(GATE-OUT) = 1 V 1.2 µs GATE DRIVE OUTPUT (GATE) tD_ON Propagation delay: EN going true to GATE output high VEN = 0 → 2.5 V, 50% of VEN to 50% of VGATE, VOUT = VVCC, R(GATE- OUT)= 1 MΩ 25 40 µs tD_OFF Propagation delay: EN going false (0 V) to GATE output low VEN = 2.5 V → 0, 50% of VEN to 50% of VGATE, VOUT = VVCC, R(GATE-OUT)= 1 MΩ, tFALL < 0.1 µs 0.5 1 µs Propagation delay: TIMER expires to GATE output low VTIMER: 0 → 5 V, tRISE < 0.1 µs, 50% of VTIMER to 50% of VGATE, VOUT = VVCC, R(GATE-OUT) = 1 MΩ, 0.8 1 µs POWER GOOD OUTPUT (PG) tDPG PG deglitch delay, detection to output, rising and falling edges VSENSE = VVCC 5 9 15 ms |
Numéro de pièce similaire - TPS2490_17 |
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Description similaire - TPS2490_17 |
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