Everest XCR - Product Manual |
Product Description
INGENIA | 08/04/2019
14
Please, use the following procedure to determine the required heatsink:
1.
Based on the voltage & continuous current required by your application and Current derating graph
determine the Case temperature
T
c
. Remember that Case temperature must be always below 85 ºC (T
c
< 85
ºC)
a.
For example: If the application requires 30 A @ 80 V (20 kHz) the T
c
will be 72.5 ºC
2. Based on the voltage & continuous current required by your application and Power losses graph determine
the generated Power Losses
P
L
to be dissipated.
a.
For example: If the application requires 30 A @ 80 V (20 kHz) the P
L
will be 28.5 W
3.
Determine the Thermal impedance of the used thermal sheet
R
th(c-h)
a.
For example, a thermal sheet TGX-150-150-0.5-0,
which has an estimated thermal impedance of R
th(c-
h)
= 0.2 K/W
4. Based on the ambient temperature and using the following formula determine the maximum thermal
impedance to air of the required heatsink
R
th(h-a)
a.
For example: If the application requires 30 A @ 80 V (20 kHz) working at T
a
= 25 ºC and we use a
thermal sheet with R
th(c-h)
= 0.2 K/W the required thermal impedance of the heatsink will be R
th(h-a)
=
1.87 K/W
