EVX10AS008BGL ETC-unknow, EVX10AS008BGL Datasheet - Page 24

• Manufacturer Part Number: EVX10AS008BGL
• Description: Adc Single 2.2gsps 10-bit Lvds 152-pin Cbga
• Manufacturer: ETC-unknow

5. Thermal and Moisture Characteristics
5.1
Figure 5-1.
24
CuW Heat Spreader
Tied to V
(diam. 8.5 mm)
Dissipation by Conduction and Convection (CBGA 152)
Circular Base
0811A–BDC–12/08
EE
= -5 V
Black Anodized Aluminum Heatsink Glued on a Copper Base Screwed on Board (All Dimensions in mm).
AI203
The thermal resistance from junction to ambient RTH
mandatory to use an external heatsink to improve dissipation by convection and conduction. The heat-
sink should be fixed in contact with the top side of the package (CuW heatspreader over Al2O3) which is
at
Example:
The thermal resistance from case to ambient RTH
the heatsink depicted in figure 1, of dimensions 50mm
junction to ambient thermal resistance RTH
4.35°C/W RTH
total (RTH
Assuming:
Note:
• Typical thermal resistance from junction to bottom of case RTH
–
Method thermal simulation results).This value does not include thermal contact resistance between
package and external heatsink (glue, paste, or thermal foil interface for example). As an example, use
2.0°C/W value for 50 µm thickness of thermal grease.
5V. The heatsink needs to be electrically isolated; using an adequate low Rth electrical isolation.
15
9
Example of calculation of ambient temperature
RTH
68.6
T
A
JA
max can be increased lowering
).
°
JA
C
JC
= 10.35
+2.0°C/W thermal grease resistance +4.0°C/W RTH
°
C/W and Power dissipation = 4.0W, T
52
50
7.4
8.5
40
RTH
JA
JA
is:
with adequate air flow (2 m/s, for example).
CA
JA
is typically 4.0°C/W (0 m/s air flow or still air) with
is around 30°C/W. Therefore, to lower RTH
×
T
A
A
50mm
max = T
max to ensure T
×
J
JC
– (
22mm (respectively L
20
RTH
is 4.35oC/Watt (Finite Element
CA
(case to ambient) + = 0.35°C/W
22
JA
J
× 4.0W) = 110 –(10.35 × 4.0) =
max = 110°C:
0.5
e2v semiconductors SAS 2008
EV10AS008B
Black Anodized
Aluminium
Copper Base with
Standoffs
Board
Holes for Screw
(diam. 2 mm)
×
assuming
l
×
H). Global
JA
it is