VN750-E / VN750S-E / VN750PT-E / VN750B5-E
2
Figure 39. P PAK Thermal Impedance Junction Ambient Single Pulse
ZTH (°C/W)
1000
100
10
1
2
0.5 cm
2
6 cm
0.1
0.0001 0.001
0.01
0.1
1
10
100
1000
Time (s)
Figure 40. Thermal fitting model of a single
channel HSD in P PAK
Pulse calculation formula
2
= RTH δ + ZTHtp(1 – δ)
δ = tp ⁄ T
THδ
where
Table 16. Thermal Parameter
2
Area/island (cm )
0.5
0.15
0.7
6
R1 (°C/W)
R2 (°C/W)
R3 ( °C/W)
R4 (°C/W)
R5 (°C/W)
R6 (°C/W)
C1 (W.s/°C)
C2 (W.s/°C)
C3 (W.s/°C)
C4 (W.s/°C)
C5 (W.s/°C)
C6 (W.s/°C)
Tj
C1
R1
C2
R2
C3
R3
C4
R4
C5
R5
C6
R6
0.7
4
Pd
9
T_amb
37
22
0.0006
0.0025
0.055
0.4
2
3
5
21/31
STMICROELECTRONICS [ ST ]
