mc33981bpna/r2 Freescale Semiconductor, Inc, mc33981bpna/r2 Datasheet - Page 30

• Manufacturer Part Number: mc33981bpna/r2
• Description: Single High-side Switch 4.0 M , Pwm Clock Up To 60khz
• Manufacturer: Freescale Semiconductor, Inc

cycle of 95%. This value is far from the 150ºC maximum
guaranteed junction.
30
33981
TYPICAL APPLICATIONS
POWER DISSIPATION
140.00
120.00
100.00
80.00
60.00
40.00
20.00
0.00
Figure 43. Junction Temperature vs. Duty Cycle
0
10
20
30
40
Duty cycle (%)
50
60
70
80
90
100
CONCLUSION
explained how to calculate power dissipation during on-state
and switching phases and the junction temperature for the
33981 when controlling a DC motor. A concrete example with
a 200 W DC motor was given in section DC Motor 200 W. The
same principle can be used for other DC motor and other
environmental conditions.
Knowing the application conditions, this document
Analog Integrated Circuit Device Data
Freescale Semiconductor