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L99LD21 데이터시트(PDF) 66 Page - STMicroelectronics |
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L99LD21 데이터시트(HTML) 66 Page - STMicroelectronics |
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66 / 73 page ![]() Package and PCB thermal data L99LD21 66/73 DS11130 Rev 5 7 Package and PCB thermal data 7.1 QFN-40L 6x6 thermal data Figure 15. QFN-40L 6x6 on four-layers PCB Table 47. PCB properties Dimension Value Board finish thickness 1.6 mm +/- 10% Board dimension 129 mm x 60 mm Board Material FR4 Copper thickness (outer layers) 0.070 mm Copper thickness (inner layers) 0.035 mm Thermal vias separation 1.2 mm Thermal via diameter 0.3 mm +/- 0.08 mm Copper thickness on vias 0.025 mm |
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