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AT32UC3A0512 Datasheet(PDF) 64 Page - ATMEL Corporation |
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AT32UC3A0512 Datasheet(HTML) 64 Page - ATMEL Corporation |
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64 / 98 page  64 AT32UC3A 13. Mechanical Characteristics 13.1 Thermal Considerations 13.1.1 Thermal Data Table 13-1 summarizes the thermal resistance data depending on the package. 13.1.2 Junction Temperature The average chip-junction temperature, T J, in °C can be obtained from the following: 1. 2. where: • θ JA = package thermal resistance, Junction-to-ambient (°C/W), provided in Table 13-1 on page 64. • θ JC = package thermal resistance, Junction-to-case thermal resistance (°C/W), provided in Table 13-1 on page 64. • θ HEAT SINK = cooling device thermal resistance (°C/W), provided in the device datasheet. •P D = device power consumption (W) estimated from data provided in the section ”Power Consumption” on page 44. •T A = ambient temperature (°C). From the first equation, the user can derive the estimated lifetime of the chip and decide if a cooling device is necessary or not. If a cooling device is to be fitted on the chip, the second equation should be used to compute the resulting average chip-junction temperature T J in °C. Table 13-1. Thermal Resistance Data Symbol Parameter Condition Package Typ Unit θ JA Junction-to-ambient thermal resistance Still Air TQFP100 43.4 ⋅C/W θ JC Junction-to-case thermal resistance TQFP100 5.5 θ JA Junction-to-ambient thermal resistance Still Air LQFP144 39.8 ⋅C/W θ JC Junction-to-case thermal resistance LQFP144 8.9 T J T A P D θ JA × () + = T J T A P ( D θ ( HEATSINK ×θ JC )) ++ = 32058KS–AVR32–01/12 |
Similar Part No. - AT32UC3A0512_14 |
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Similar Description - AT32UC3A0512_14 |
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