TEA2025D datasheet(6/9 Pages) STMICROELECTRONICS

6 / 9 page

Stability

A good layout is recommended in order to avoid

oscillations.

Generally the designer must pay attention on the

following points:

- Short wires of components and short connec-

tions.

- No ground loops.

- Bypass of supply voltage with capacitors as

nearest as possible to the supply I.C.pin.The

low value(poliester)capacitors must

have

good temperature and frequency charac-

teristics.

- No sockets.

2) the heatsink can have a smaller factor of safety

compared with that of a conventional circuit.

There is no device damage in the case of ex-

cessive junction temperature: all that happens

is that PO (and therefore Ptot) and Id are re-

duced.

APPLICATION SUGGESTION

The recommended values of the components are

those

shown on stereo application

circuit of

Fig. 2

different values can be used, the follow-

ing table can help the designer.

COMPONENT

RECOMMENDED

VALUE

PURPOSE

LARGER THAN

SMALLER THAN

C1,C2

0.22

µF

INPUT

DECOUPLING

CASE

SLIDER

CONTACT NOISE OF

VARIABLE

RESISTOR

100

µF

RIPPLE REJECTON

DEGRADATION

SVR, INCREASE OF

THD

LOW

FREQUENCY

AND

LOW VOLTAGE

C4,C5

100

µF

BOOTSTRAP

C6,C7

470

µF

OUTPUT

DECOUPLING

INCREASE OF LOW

FREQUENCY

CUT-

OFF

C8,C9

0.15

µF

FREQUENCY

STABILITY

DANGER

OSCILLATIONS

C10, C11

100

µF

INVERTING

INPUT

DC DECOUPLING

INCREASE OF LOW

FREQUENCY

CUT-

OFF

TEA2025B - TEA2025D

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