TDA7266SA

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HEAT SINK DIMENSIONING:

The parameters that influence the dimensioning are:

Example:

(Heat Sinker)

In figure 12 is shown the Power derating curve for the device.

Figure 12. Power derating curve

V

cc

2

Π

2

R

loa d

2

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

⋅

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

I

q

V

cc

⋅

+

R

Th c-a

150

T

am b max

–

P

d max

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

R

Th j-c

–

150

50

–

6.5

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

2.5

–

12.8

°C/W

==

=

a)

Infinite Heatsink

b)

7 °C/ W

c)

10 °C/ W

(c)

(a)

(b)

0

5

10

15

20

25

0

40

80

120

160

Tamb (°C)

a)

Infinite Heatsink

b)

7 °C/ W

c)

10 °C/ W

(c)

(a)

(b)

0

5

10

15

20

25

0

40

80

120

160

Tamb (°C)