MC33981BHFK Freescale Semiconductor, MC33981BHFK Datasheet - Page 33

• Manufacturer Part Number: MC33981BHFK
• Description: HF 4.0MOHM RDSON SWITCH
• Manufacturer: Freescale Semiconductor

JUNCTION TEMPERATURE
for the condition listed in
maximum obtained junction temperature is 132 ºC with a duty
cycle of 95%. This value is far from the 150ºC maximum
guaranteed junction.
Analog Integrated Circuit Device Data
Freescale Semiconductor
The junction temperature of the 33981 versus duty cycle
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
Figure
40
Duty cycle (%)
38, is given in
50
60
70
Figure
80
43. The
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
principle can be used for other DC motors and other
environmental conditions.
Knowing the application conditions, this document
DC Motor
TYPICAL APPLICATIONS
POWER DISSIPATION
200W. The same
33981
33