L6235 Datasheet, PDF (20/25 Pages) STMicroelectronics – DMOS DRIVER FOR THREE-PHASE BRUSHLESS DC MOTOR

L6235
Figure 24. PowerDIP24 Junction-Ambient thermal resistance versus on-board copper area.
ºC / W
49
48
C o p pe r Are a is o n Bo tto m
S id e
47
46
C o p pe r Are a is o n To p S i de
45
44
43
42
41
40
39
1 2 3 4 5 6 7 8 9 10 11 12
s q. cm
On-Board Copper Area
Figure 25. SO24 Junction-Ambient thermal resistance versus on-board copper area.
ºC / W
68
66
64
62
60
C o pp er A re a is o n T op S id e
58
56
54
52
50
48
1 2 3 4 5 6 7 8 9 10 11 12
s q. cm
On-Board Copper Area
Figure 26. Mounting the PowerSO Package.
Slug soldered
to PCB with
dissipating area
Slug soldered
to PCB with
dissipating area
plus ground layer
Slug soldered to PCB with
dissipating area plus ground layer
contacted through via holes
20/25