ATEVK1104S Atmel, ATEVK1104S Datasheet - Page 73

• 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