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UCC28251RGPT Datasheet(PDF) 8 Page - Texas Instruments |
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UCC28251RGPT Datasheet(HTML) 8 Page - Texas Instruments |
8 / 55 page 8 UCC28251 SLUSBD8E – FEBRUARY 2013 – REVISED DECEMBER 2014 www.ti.com Product Folder Links: UCC28251 Submit Documentation Feedback Copyright © 2013–2014, Texas Instruments Incorporated Electrical Characteristics (1) (continued) VDD = 12 V, 1-µF capacitor from VDD and VREF to GND, TA = TJ = –40°C to 125°C, RT = 75 kΩ connected to ground to set FSW = 100 kHz (unless otherwise noted). PARAMETER TEST CONDITIONS MIN TYP MAX UNIT OVP/OTP COMPARATOR VOVP Internal reference 0.66 0.70 0.74 V IOVP Internal current 6.0 8.5 11.0 µA PRIMARY OUTPUTS Rise/fall time CLOAD = 100 pF 8 ns RSRC Output source resistance IOUT = 20 mA 12 20 35 Ω RSNK Output sink resistance IOUT = 20 mA 4 12 30 SYNCHRONOUS RECTIFIER OUTPUTS Rise/fall time CLOAD = 100 pF 8 ns RSRC Output source resistance IOUT = 20 mA, VDD = 12 V 12 20 35 Ω IOUT = 20 mA, VDD = 5 V 15 25 45 RSNK Output sink resistance IOUT = 20 mA, VDD = 12 V 4 12 30 TDPS Primary off to secondary on dead time PS = VREF –5.0 0 7.5 ns PS = 27 kΩ 25 38 48 PS = 27 kΩ, 25 °C 32 38 43 TDSP Secondary off to primary on dead time SP = VREF –5.0 0 7.5 ns SP = 20 kΩ 33 43 55 SP = 20 kΩ, 25 °C 39 43 48 |
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