Figure 17 : Total Power Dissipation and

Efficiency vs. Output Power .

APPLICATION SUGGESTION

The recommended values of the componentsare those shown on application circuit of fig.1. Different values

can be used ; the following table can help the designer.

Component

Recomm. Value

Purpose

Larger Than

Smaller Than

R1

120K

Ω

Optimization of the

output signal simmetry

R2, R4

1K

Ω

Close loop gain

setting (*)

Increase of gain

Decrease of gain

R3, R5

3.3

Ω

Decrease of gain

Increase of gain

R6, R7

1

Ω

Frequency stability

Danger of oscillation

at high frequency with

inductive load

C1, C2

2.2

µF

Input DC decoupling

High turn-on delay

High turn-on pop

Higher low frequency

cutoff. Increase of

noise

C3

10

µF

Ripple Rejection

Increase of SVR.

Increase of the switch-

on time.

Degradation of SVR.

C4, C6

100

µF

Boostrapping

Increase of distortion

at low frequency

C5, C7

100

µF

Feedback Input DC

decoupling.

C8, C9

0.1

µF

Frequency Stability

Danger of oscillation.

C10, C11

1000

µF to 2200µF

Output DC decoupling.

Higher low-frequency

cut-off.

(*) The closed–loop gain must be higher than 26dB.

TDA2004A

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