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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AM186ED-20KC/W датащи(PDF) 51 Page - Advanced Micro Devices |
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AM186ED-20KC/W датащи(HTML) 51 Page - Advanced Micro Devices |
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51 / 88 page  Am186ED/EDLV Microcontrollers 51 PRELI M INARY D RA F T THERMAL CHARACTERISTICS TQFP Package Th e Am 186ED microcontroller is sp ecifie d for operation with case temperature ranges from 0 °C to +100 °C for a commercial device. Case temperature is measured at the top center of the package as shown in Figure 13. The various temperatures and thermal resistances can be determined using the equations in Figure 14 with information given in Table 11. The total thermal resistance is θ JA; θJA is the sum of θ JC, the internal thermal resistance of the assembly, and θ CA, the case to ambient thermal resistance. The variable P is power in watts. Power supply current (ICC) is in mA per MHz of clock frequency. Figure 13. Thermal Resistance( °C/Watt) Figure 14. Thermal Characteristics Equations Table 11. Thermal Characteristics ( °C/Watt) θ JA θ CA θ JC θ JA = θJC + θCA TC Package/Board Airflow (Linear Feet per Minute) θ JA θ JC θ CA PQFP/2-Layer 0 fpm 45 7 38 200 fpm 39 7 32 400 fpm 35 7 28 600 fpm 33 7 26 TQFP/2-Layer 0 fpm 56 10 46 200 fpm 461036 400 fpm 401030 600 fpm 381028 PQFP/4-Layer to 6-Layer 0 fpm 23518 200 fpm 21 5 16 400 fpm 19 5 14 600 fpm 17 5 12 TQFP/4-Layer to 6-Layer 0 fpm 30624 200 fpm 28 6 22 400 fpm 26 6 20 600 fpm 24 6 18 θ JA = θJC + θCA P=ICC ⋅ freq (MHz) ⋅ V CC TJ=TC+( P ⋅θ JC ) TJ=TA+ ( P ⋅θ JA ) TC=TJ–( P ⋅θ JC ) TC=TA+( P ⋅θ CA ) TA=TJ–( P ⋅θ JA ) TA=TC–( P ⋅θ CA ) |
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