Datasheet

Package and PCB thermal data VNH5180A-E
24/31 Doc ID 17074 Rev 6
4.1.2 Thermal calculation in transient mode
T
hs
= P
dhs
• Z
hs
+ Z
hsls
• (P
dlsA
+ P
dlsB
) + T
amb
T
lsA
= P
dlsA
• Z
ls
+ P
dhs
• Z
hsls
+ P
dlsB
• Z
hsls
+ T
amb
T
lsB
= P
dlsB
• Z
ls
+ P
dhs
• Z
hsls
+ P
dlsA
• Z
hsls
+ T
amb
Figure 18. Detailed chipset configuration
Equation 1: pulse calculation formula
where
CHIP 1
Z
ts
CHIP 2
CHIP 3
Z
ls
Z
ls
Z
hsls
Z
hsls
Z
lsls
Z
THδ
R
TH
δ Z
THtp
1 δ–()+⋅=
δ t
p
T⁄=