15/19

VN920DSP

Figure 27. PowerSO-10 Thermal Impedance Junction Ambient Single Pulse

Figure 28. Thermal fitting model of a double

channel HSD in PowerSO-10

Pulse calculation formula

Table 14. Thermal Parameter

0.01

0.1

1

10

100

0.0001

0.001

0.01

0.1

1

10

100

1000

Time (s)

ZTH (°C/W)

Footprint

T_amb

C1

R1

R2

C2

R3

C3

R4

C4

R5

C5

R6

C6

Pd

Tj

Footprint

6

R1 (°C/W)

0.02

R2 (°C/W)

0.1

R3( °C/W)

0.2

R4 (°C/W)

0.8

R5 (°C/W)

12

R6 (°C/W)

37

22

C1 (W.s/°C)

0.0015

C2 (W.s/°C)

7.00E-03

C3 (W.s/°C)

0.015

C4 (W.s/°C)

0.3

C5 (W.s/°C)

0.75

C6 (W.s/°C)

3

5

Z

TH

δ

R

TH

δ Z

δ

–

()

+

⋅

=

where

δ

t

⁄

=