Mitsubishi Electric PSS**S72FT Manual page 18

Dual-in-line package intelligent power module
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<Dual-In-Line Package Intelligent Power Module>
1200V Mini DIPIPM with BSD Series APPLICATION NOTE
Table 2-2-7 Outer heat sink
Heat sink size
( W x D x H )
200 x 85 x 40 mm
Procedure about setting the protection level by using Fig.2-2-14 is described as below.
Table 2-2-8 Procedure for setting protection level
1)
Set the protection Tj temperature
Get LVIC temperature Tic that matches to above Tj
2)
of the protection level from the relationship of Tj-Tic
in Fig.2-2-14.
Get V
value from the VOT output characteristics in
OT
3)
Fig.2-2-15 and the Tic value which was obtained at
phase 2) .
As above procedure, the setting value for V
spread, so it is important to confirm whether the protection temperature fluctuation of Tj is not Tj>150°C due
to the data spread of V
Table 2-2-9.
Table 2-2-9 Procedure for confirmation of temperature fluctuation
Confirm the region of Tic fluctuation at above V
4)
from Fig.2-2-15.
Confirm the region of Tj fluctuation at above region
5)
of Tic from Fig.2-2-14.
Publication Date: September 2015
140
120
100
Tj
80
Tc
Tic
60
40
20
0
10
15
20
25
Fig.2-2-13 Example of relationship of Tj, Tc, Tic
(
One IGBT chip turns on. DC current Ta=25°C
Procedure
OT
output. Procedure about the confirmation of temperature fluctuation is described in
OT
Procedure
W
D
H
30
35
40
45
50
Loss [W]
)
Set Tj to 135°C as protection level.
Tic=85°C (@Tj=135°C)
V
=2.64V (@Tic=85°C) is decided as the
OT
protection level.
output is decided to 2.64V. But V
Tic=80°C~90°C (@V
OT
Tj=117°C~147°C (≤150°C No problem)
In this case, fluctuation of Tc is
Tc=100°C~120°C
18
55
60
Setting value example
output has some data
OT
Confirmation example
=2.64V)
OT

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