TDA7268(2003) データシートの表示（PDF） - STMicroelectronics

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TDA7268
(Rev.:2003)

2 x 2W STEREO AUDIO AMPLIFIER

STMicroelectronics 

TDA7268

Fig. 1: Standard Test and Application Circuit

1 VS1

VS=12V

C1 0.1µF

IN1 4

IN1

+

2 OUT1

C4

100µF

R1

-

10K

C5

470µF

8Ω

8 VS2

t(s) C2 0.1µF

IN2 5

IN2

+

C6 470µF

7 OUT2

uc R2

-

d 10K

ro ) SVR 3

P t(s 8Ω

S1

lete duc STAND-BY

C3

47µF

6

S-GND

9÷16

P-GND

D94AU168D

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

OObbssoolleettee PPrroodduucctt((ss)) -- OObbsolete P Fig. 2: PCB And Components Layout Of The Application Circuit of Figure 1

APPLICATION HINTS:

For 12V supply and 8Ω 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

4/6

- 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-

charge Csvr current.

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