9/12

TDA7265SA

(Heat Sinker)

In figure 20 is shown the Power derating curve for the device.

Figure 20. Power derating curve

7

CLIPWATT ASSEMBLING SUGGESTIONS

The suggested mounting method of Clipwatt on external heat sink, requires the use of a clip placed as much as

possible in the plastic body center, as indicated in the example of figure 21.

A thermal grease can be used in order to reduce the additional thermal resistance of the contact between pack-

age and heatsink.

A pressing force of 7 - 10 Kg gives a good contact and the clip must be designed in order to avoid a maximum

at least.

Figure 21. Example of right placement of the clip

R

Th c-a

150

T

amb max

–

P

d max

-----------------------------------------

R

Th j-c

–

150

50

–

16

----------------------

3

–

3.25

°C/W

==

=

a)

Infinite Heatsink

b)

1.5 °C/ W

c)

3.0 °C/ W

(c)

(a)

(b)

0

5

10

15

20

25

30

35

0

40

80

120

160

Tamb (°C)

a)

Infinite Heatsink

b)

1.5 °C/ W

c)

3.0 °C/ W

(c)

(a)

(b)

0

5

10

15

20

25

30

35

0

40

80

120

160

Tamb (°C)