AN1625 STMicroelectronics, AN1625 Datasheet - Page 21

• Manufacturer Part Number: AN1625
• Description: L6235 THREE PHASE BRUSHLESS DC MOTOR DRIVER
• Manufacturer: STMicroelectronics

Figure 21. Maximum output current vs. selectable devices.
2.13.2 Power Dissipation Formulae
Figure 22 to Figure 25 are screenshots of a spreadsheet that helps calculating power dissipation in specified
conditions (application and motor data), and estimates the resulting junction temperature for a given package
and copper area available on the PCB [3].
The model considers power dissipation during the on-time and the off-time, taking into account the selected de-
cay, rise and fall time (when a phase change occurs), the switching losses and the quiescent current power dis-
sipation.
Load Current
[A]
2.30
2.10
1.90
1.70
1 .50
1 .30
1 .1 0
0 .9 0
0 .7 0
0 .5 0
AN1625 APPLICATION NOTE
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