mc33288ddh/r2 Freescale Semiconductor, Inc, mc33288ddh/r2 Datasheet - Page 10

• Manufacturer Part Number: mc33288ddh/r2
• Description: Solid State Relay For Automotive Flasher Applications
• Manufacturer: Freescale Semiconductor, Inc

Transient Thermal Model
proposed in Figure 3.
which has been determined with the printed circuit board
shown in Figure 1.
10
33288
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
A more complete model including thermal capacitance is
This gives a thermal impedance versus time (Figure 4),
5mJ/K
450K/W
Ambiant
MOS1
0.5J/K
Figure 5. Transient Thermal Model
3K/W
3K/W
5mJ/K
20K/W
Board
Case
MOS2
3K/W
3K/W
1mJ/K
MOS3
6J/K
3.5K/W
3.5K/W
4mJ/K
300K/W
Control
about 10 minutes. It also clearly shows that the device can
dissipate almost twice the power within one minute compared
to the maximum allowed power dissipation in steady state.
This figure shows that the steady state is reached after
Figure 6. Junction to Ambiant Thermal Impedance
30
20
10
0
0
100
200
Analog Integrated Circuit Device Data
300
Time (sec.)
400
Freescale Semiconductor
500
600
700
800