Equation: pulse calculation formula

ZTHδ = RTH · δ + ZTHtp (1 - δ)

where δ = tP/T

Figure 40. Thermal fitting model of a double-channel HSD in PowerSSO-16

Note:

The fitting model is a simplified thermal tool and is valid for transient evolutions where the embedded protections

(power limitation or thermal cycling during thermal shutdown) are not triggered.

Table 13. Thermal parameters

Area/island (cm2)

Footprint

2

8

4L

R1 (°C/W)

1.1

R2 (°C/W)

3

R3 (°C/W)

7

7

7

5

R4 (°C/W)

16

6

6

4

R5 (°C/W)

30

20

10

3

R6 (°C/W)

26

20

18

7

C1 (W.s/°C)

0.0004

C2 (W.s/°C)

0.008

C3 (W.s/°C)

0.1

C4 (W.s/°C)

0.2

0.3

0.3

0.4

C5 (W.s/°C)

0.4

1

1

4

C6 (W.s/°C)

3

5

7

18

VN7040AJ, VN7040AS

PowerSSO-16 thermal data

DS10829 - Rev 5

page 27/45