ATEVK1104S Atmel, ATEVK1104S Datasheet - Page 73
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ATEVK1104S
Manufacturer Part Number
ATEVK1104S
Description
KIT EVAL FOR AT32UC
Manufacturer
Atmel
Series
AVR®32 UC3r
Type
MCUr
Specifications of ATEVK1104S
Contents
Board, Cables
Tool Type
Development Kit
Cpu Core
AVR 32
Data Bus Width
32 bit
Processor Series
AT32
Processor To Be Evaluated
AT32UC3A3256S
Interface Type
USB, JTAG, SD Card, Nexus, MMC
Core Architecture
AVR
Operating Supply Voltage
5.5 V
For Use With/related Products
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
11. Mechanical Characteristics
11.1
11.1.1
11.1.2
32072C–AVR32–2010/03
Thermal Considerations
Thermal Data
Junction Temperature
Table 11-1
Table 11-1.
The average chip-junction temperature, T
where:
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
θ
θ
1.
2.
• θ
• θ
• θ
• P
• T
JA
JC
JA
JC
JA
JC
page
Table 11-1 on page
characteristics” on page
JA
JC
HEAT SINK
A
D
T
T
= 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
J
J
=
73.
=
T
summarizes the thermal resistance data depending on the package.
T
A
A
= cooling device thermal resistance (°C/W), provided in the device datasheet.
Parameter
Junction-to-ambient thermal resistance
Junction-to-case thermal resistance
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 (
θ
HEATSINK
73.
JA
)
49.
+
θ
JC
) )
J
, in °C can be obtained from the following:
Condition
Still Air
Still Air
Still Air
TFBGA144
TFBGA144
VFBGA100
VFBGA100
TQFP144
TQFP144
Package
AT32UC3A3/A4
Table 11-1 on
40.3
28.5
31.1
Typ
9.5
6.9
6.9
”Regulator
J
°C/W
°C/W
°C/W
in °C.
Unit
73