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UC2825AQDWREP データシート(PDF) 6 Page - Texas Instruments |
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UC2825AQDWREP データシート(HTML) 6 Page - Texas Instruments |
6 / 21 page UC2825A-EP SGLS305D – JULY 2005 – REVISED SEPTEMBER 2010 www.ti.com Electrical Characteristics (continued) TA = –40°C to 125°C for Q temperature and TA = –55°C to 125°C for M temperature, RT = 3.65 kΩ, CT = 1 nF, VCC = 12 V PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Current Limit/Start Sequence/Fault ISS Soft-start charge current VSS = 2.5 V 8 14 20 mA VSS Full soft-start threshold voltage 4.3 5 V IDSCH Restart discharge current VSS = 2.5 V 100 250 350 mA ISS Restart threshold voltage 0.3 0.5 V IBIAS ILIM bias current VILIM = 0-V to 2-V step 15 mA ICL Current-limit threshold voltage 0.95 1 1.05 V Overcurrent threshold voltage 1.14 1.2 1.26 V td Delay-to-output time, ILIM(2) VILIM = 0-V to 2-V step 50 80 ns Output IOUT = 20 mA 0.25 0.4 Low-level output saturation voltage V IOUT = 200 mA 1.2 2.2 IOUT = 20 mA 1.9 2.9 High-level output saturation voltage V IOUT = 200 mA 2 3 tr, tf Rise/fall time(2) CL = 1 nF 20 45 ns Undervoltage Lockout (UVLO) Start threshold voltage 8.4 9.2 9.6 V UVLO hysteresis 0.4 0.8 1.2 V Supply Current Isu Startup current VC = VCC = VTH(start) – 0.5 V 100 300 mA ICC Input current 28 36 mA (2) Specified by design. Not production tested. 6 Submit Documentation Feedback Copyright © 2005–2010, Texas Instruments Incorporated Product Folder Link(s): UC2825A-EP |
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