TDA2030A

Application recommendation

Doc ID 1459 Rev 2

19/23

6

Application recommendation

The recommended values of the components are those shown in the application circuit of

Figure 17. Different values can be used, please refer to the guidelines in Table 7.

Table 7.

Recommended values of components for a typical amplifier

Comp.

Recom.

value

Purpose

Larger than

recommended value

Smaller than

recommended value

R1

22 k

Ω

Closed loop gain setting

Increase of gain

Decrease of gain

R2

680

Ω

Closed loop gain setting

Decrease of gain(1)

1.

The value of closed loop gain must be higher than 24 dB.

Increase of gain

R3

22 k

Ω

Non inverting input

biasing

Increase of input impedance

Decrease of input

impedance

R4

1

Ω

Frequency stability

Danger of oscillation at high

frequencies with inductive loads

R5

≅ 3 R2

Upper frequency cutoff

Poor high-frequency attenuation

Danger of oscillation

C1

1

μF

Input DC decoupling

Increase of low-frequency

cutoff

C2

22

μF

Inverting DC decoupling

Increase of low-frequency

cutoff

C3, C4

0.1

μF

Supply voltage bypass

Danger of oscillation

C5, C6

100

μF

Supply voltage bypass

Danger of oscillation

C7

0.22

μF Frequency stability

Larger bandwidth

C8

≅

Upper frequency cutoff

Smaller bandwidth

Larger bandwidth

D1, D2

1N4001

To protect the device against output voltage spikes

1

2

πBR1

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Obsolete

Product(s)

- Obsolete

Product(s)