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XC9201DCCKR Datasheet(PDF) 11 Page - Torex Semiconductor |
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XC9201DCCKR Datasheet(HTML) 11 Page - Torex Semiconductor |
11 / 24 page 11/24 XC9201 Series ● Functional Settings 1. Soft-Start CE and soft-start (SS) functions are commonly assigned to the CE/SS pin. The soft start function is effective until the voltage at the CE pin reaches approximately 1.55V rising from 0V. Soft start time is approximated by the equation below according to values of Vcont, RSS, and CSS. T=-Css x Rss x ln((Vcont-1.55)/Vcont) Example: When Css=0.1μF, Rss=470kΩ, and Vcont=5V, T= - 0.1 x 10 -6 × 470 x 103 × In((5-1.55) / 5)=17.44ms. Set the soft-start time to a value sufficiently longer than the period of a clock pulse. > Circuit example 1: N-ch open drain > Circuit example 2: CMOS logic (low current dissipation) > Circuit example 3: CMOS logic (low current dissipation) ■ OPERATIONAL EXPLANATION (Continued) |
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