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Os motores de busca de Datasheet de Componentes eletrônicos |
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Os motores de busca de Datasheet de Componentes eletrônicos |
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AN3338 Folha de dados(PDF) 67 Page - STMicroelectronics |
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AN3338 Folha de dados(HTML) 67 Page - STMicroelectronics |
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67 / 72 page  Doc ID 18441 Rev 4 67/72 AN3338 Design and mounting guidelines 72 5.2.2 Mounting torque While mounting the SLLIMM to a heatsink make sure not to apply excessive force during the assembly. Table 14 provides the specified fastening torque. Inappropriate mounting can damage the device and over tightening the screws may cause DBC substrate or molding compound cracks. Avoid mechanical stress due to tightening on one side only. It is recommended to temporarily fasten both screws, then fasten them permanently to the specified torque value using a torque wrench. Figure 47 shows the screw fastening order. Figure 45. Recommended silicon grease thickness and positioning Heatsink 100~200 m thickness SLLIMM Table 14. Mounting torque and heatsink flatness Parameter Limits Units Min. Typ. Max. Mounting torque (M3 screw) 0.4 0.7 1.0 Nm Heatsink flatness -50 150 µm SDIP-25L package weight 13 g SDIP-38L package weight 17 g |
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