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L4993MD 数据表(PDF) 22 Page - STMicroelectronics |
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L4993MD 数据表(HTML) 22 Page - STMicroelectronics |
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22 / 31 page ![]() Package and PCB thermal data L4993 22/31 DS5285 Rev 10 4.2 SO-20 thermal data Figure 32. SO-20 PC board Note: Layout condition of Rth and Zth measurements (PCB FR4 area= 58mm x 58mm,PCB thickness = 2 mm, Cu thickness=35 m, Copper areas: from minimum pad lay-out to 6 cm2). Figure 33. Rthj-amb Vs. PCB copper area in open box free air condition . |
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