VN750-E / VN750S-E / VN750PT-E / VN750B5-E
Figure 35. SO-8 Thermal Impedance Junction Ambient Single Pulse
ZTH (°C/W)
1000
2
0.5 cm
100
10
2
2 cm
1
0.1
0.01
0.0001 0.001
0.01
0.1
1
10
100
1000
Time (s)
Figure 36. Thermal fitting model of a single
channel HSD in SO-8
Pulse calculation formula
= RTH δ + ZTHtp(1 – δ)
δ = tp ⁄ T
THδ
where
Table 14. Thermal Parameter
2
Area/island (cm )
0.5
0.05
0.8
2
28
2
R1 (°C/W)
R2 (°C/W)
R3 ( °C/W)
R4 (°C/W)
R5 (°C/W)
R6 (°C/W)
C1 (W.s/°C)
Tj
C1
R1
C2
R2
C3
R3
C4
R4
C5
R5
C6
R6
3.5
21
Pd
16
T_amb
58
0.006
C2 (W.s/°C)
C3 (W.s/°C)
C4 (W.s/°C)
C5 (W.s/°C)
C6 (W.s/°C)
2.60E-03
0.0075
0.045
0.35
1.05
19/31