TDA7262 Просмотр технического описания (PDF) - STMicroelectronics

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TDA7262

20+20W STEREO AMPLIFIER WITH STAND-BY

STMicroelectronics 

TDA7262

APPLICATION SUGGESTION

The recommended values of the components are those shown on application circuit of Figure 1. Differ-

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

Component

R1 and R3

R2 and R4

R5 and R6

C1 and C2

Recomm.

Value

1.3KΩ

18Ω

1Ω

2.2µF

Purpose

Close loop gain setting (*)

Frequency stability

Input DC decoupling

Larger than

Increase of gain

Decrease of gain

Danger of oscillations

higher turn-on delay

C3

22µF (**) - Ripple rejection

- Stand-by time constant

C4

C5

C6 and C7

C8 and C9

C10 and C11

100nF

1000µF

220µF

0.1µF

1000µF to

2200µF

Supply setting

Supply setting

Feedback input DC

decoupling

Frequency stability

Output DC decoupling

(*) Closed loop gain must be higher than 26dB.

(**) 220µF in case of stand-by utilization.

Increase of the

Switch-on time

Smaller than

Decrease of gain

Increase of gain

- worse turn-ON pop

- higer low freq. cutoff.

Increase of noise

- Degradation of SVR

- worse turn-OFF pop by

stand-by

Danger of oscillations

worse turn-OFF pop

Danger of oscillations

Higher low-frequency

cut-off

Figure 2: Ouput Power vs. Supply Voltage

Figure 3: Ouput Power vs. Supply Voltage

4/8

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