TDA2005

Application suggestion

Doc ID 1451 Rev 6

15/25

3

Application suggestion

The recommended values of the components are those shown on bridge application circuit

of Figure 3. Different values can be used; the following table can help the designer.

Table 8.

Recommended values of the component of the bridge application circuit

Component

Recommended

value

Purpose

Larger than

Smaller than r

C1

2.2

F

Input DC decoupling

-

-

C2

2.2

F

Optimization of turn on

Pop and turn on Delay

High turn on delay

High Turn on Pop, Higher

low frequency cutoff

Increase of Noise

C3

0.1

F

Supply bypass

-

Danger of oscillation

C4

10

F

Ripple rejection

Increase of SVR,

Increase of the Switch-

on Time

Degradation of SVR

C5, C7

100

F

Bootstrapping

-

Increase of distortion at

low frequency

C6, C8

220

F

Feedback input DC

decoupling, low

frequency cut-off

-

Danger of oscillation at

high frequencies with

inductive loads

C9, C10

0.1

F

Frequency stability

-

Danger of oscillation

R1

120 k



Optimization of the

output symmetry

Smaller Pomax

Smaller Pomax

R2

1 k



---

R3

2 k



---

R4, R5

12



Closed loop gain setting

(see Bridge Amplifier

Design(1))

--

R6, R7

1



Frequency stability

Danger of oscillation at

high frequencies with

inductive loads

-

1.

The closed loop gain must be higher than 32 dB.