TDA2003A

Application information

Doc ID 018796 Rev 4

15/19

3.2.3

Application recommendations

The recommended component values are those shown in the application circuit in

Figure 20. Different values can be used. The following table is intended to aid the car-radio

designer.

Table 5.

Recommended values of the components of a bridge application circuit

Component

Recommended

value

Purpose

Larger than

recommended value

Smaller than

recommended value C1

C1

2.2 µF

Input DC decoupling

-

Noise at switch-on, switch-off

C2

470 µF

Ripple rejection

-

Degradation of SVR

C3

0.1 µF

Supply bypassing

-

Danger of oscillation

C4

1000 µF

Output coupling to load

-

Higher low frequency cutoff

C5

0.1 µF

Frequency stability

-

Danger of oscillation at high

frequencies with inductive

loads

≅

Upper frequency cutoff

Lower bandwidth

Larger bandwidth

R1

(Gv-1)

Setting of gain

-

Increase of drain current

R2

2.2

Ω

Setting of gain and SVR

Degradation of SVR

-

R3

1

Ω

Frequency stability

Danger of oscillation

at high frequencies

with inductive loads

-

≅ 20 R2

Upper frequency cutoff

Poor high frequency

attenuation

Danger of oscillation

1

2

πBR1

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