AT32UC3A0512-ALTES ATMEL [ATMEL Corporation], AT32UC3A0512-ALTES Datasheet - Page 59
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AT32UC3A0512-ALTES
Manufacturer Part Number
AT32UC3A0512-ALTES
Description
AVR32 32-Bit Microcontroller
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT32UC3A0512-ALTES.pdf
(86 pages)
- Current page: 59 of 86
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13. Mechanical Characteristics
13.1
13.1.1
13.1.2
32058FS–AVR32–08/08
Thermal Considerations
Thermal Data
Junction Temperature
Table 13-1
Table 13-1.
The average chip-junction temperature, T
where:
• θ
• θ
• θ
• P
• T
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
Symbol
θ
θ
θ
θ
1.
2.
59.
Table 13-1 on page
Consumption” on page
JA
JC
JA
JC
JA
JC
HEAT SINK
A
D
= ambient temperature (°C).
= device power consumption (W) estimated from data provided in the section
= package thermal resistance, Junction-to-ambient (°C/W), provided in
= package thermal resistance, Junction-to-case thermal resistance (°C/W), provided in
T
T
J
J
=
=
T
summarizes the thermal resistance data depending on the package.
= cooling device thermal resistance (°C/W), provided in the device datasheet.
T
A
A
Parameter
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
+
Thermal Resistance Data
+
P (
(
P
D
D
×
×
θ (
59.
θ
HEATSINK
JA
42.
)
+
θ
JC
) )
J
, in °C can be obtained from the following:
Condition
Still Air
Still Air
TQFP100
TQFP100
LQFP144
LQFP144
Package
AT32UC3A
Table 13-1 on page
TBD
TBD
TBD
TBD
Typ
”Power
J
⋅C/W
⋅C/W
in °C.
Unit
59
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