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VNQ810P-E Datasheet(PDF) 21 Page - STMicroelectronics |
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VNQ810P-E Datasheet(HTML) 21 Page - STMicroelectronics |
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21 / 28 page  VNQ810P-E Package and PCB thermal data Doc ID 17387 Rev 2 21/28 4 Package and PCB thermal data 4.1 SO-28 thermal data Figure 27. SO-28 double island PC board Note: Layout condition of Rth and Zth measurements (PCB FR4 area = 58 mm x 58 mm, PCB thickness = 2 mm, Cu thickness = 35 µm, Copper areas: 0.5 cm2, 3 cm2, 6 cm2). RthA = thermal resistance junction to ambient with one chip ON RthB = thermal resistance junction to ambient with both chips ON and Pdchip1 = Pdchip2 RthC = mutual thermal resistance Table 16. Thermal calculation according to the PCB heatsink area Chip 1 Chip 2 Tjchip1 Tjchip2 Note ON OFF RthA x Pdchip1 + Tamb RthC x Pdchip1 + Tamb OFF ON RthC x Pdchip2 + Tamb RthA x Pdchip2 + Tamb ON ON RthB x (Pdchip1 + Pdchip2) + Tamb RthB x (Pdchip1 + Pdchip2) + Tamb Pdchip1 = Pdchip2 ON ON (RthA x Pdchip1) + RthC x Pdchip2 + Tamb (RthA x Pdchip2) + RthC x Pdchip1 + Tamb Pdchip1 ≠ Pdchip2 |
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