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SANKEN ELECTRIC CO., LTD.

2 A Non-Isolated Step-Down DC/ DC Converter Modules

MPM8x Series

March 11, 2013

MPM80-DS, Rev. 0.1

Thermal Derating

0.0

0.5

1.0

1.5

2.0

2.5

-20

0

20

40

60

80

100

Figure 2 shows thermal derating curves for the MPM80. The

in use.

Use the MPM80 within the thermal derating curves shown in

figure 2. If using the MPM80 outside the curves, consider using

MPM80 junction and case is 8 °C/W. Therefore, use the MPM80

using the following procedure.

follows:

(2)

where

thermal resistances of the MPM80 and a heatsink, as follows:

(3)

where

sink, in degrees Celsius per watt,

the MPM80 case, in degrees Celsius per watt, and

per watt.

(4)

use the MPM80 at a junction temperature of 125°C or less.