APPLICATION HINTS:

For 12V supply and 8

Ω speaker application, its

maximum power dissipation is about 2W.

Assumming that max ambient temperature is

70

°C. Required thermal resistance of the device

and heat dissipating means must be equal to (150

- 70)/2 = 40

°C/W.

Junction to pin thermal resistance of the package

is about 15

°C/W.

That means external heat sink of about 25

°C/W is

required. Stand-By switches must be able to dis-

IN1

OUT1

D94AU168D

IN2

SVR

S-GND

OUT2

P-GND

+

-

+

-

C4

100

µF

C5

470

µF

8

Ω

IN1

C6 470

µF

8

Ω

C2 0.1

µF

C3

47

µF

IN2

C1 0.1

µF

S1

STAND-BY

1

4

2

8

7

5

3

69

÷16

R1

10K

R2

10K

Note: Add R1 & R2 on demoboard only for DC tests.

Fig. 1: Standard Test and Application Circuit

Fig. 2: PCB And Components Layout Of The Application Circuit of Figure 1

TDA7268

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