TA8210AHQ Ver la hoja de datos (PDF) - Toshiba

Número de pieza

componentes Descripción

Fabricante

TA8210AHQ

20W BTL × 2ch Audio Power Amplifier

Toshiba 

TA8210AHQ/ALQ

5. Muting function

Through setting pin(1) (mute terminal) at about 1V or less, muting becomes possible.

The interval circuit of IC is shown in Fig.4.

When pin(1) is set to low, Q1 and Q2 are turned to on, the charge of the ripple condenser is discharged and the

bias is cut. The mute amount of 60dB or over can be obtained.

Since this muting function rapidly discharge the charge of the ripple filter capacitor of pin(8), the pop noise is

generated by the DC fluctuation of the bias section.

Therefore, this muting function is not appropriate to the audio muting but it is effective in muting at VCC→on.

6. External part list and description

Sym−

bol

Recom−

mended

Value

Feature

C1

4.7µF

DC blocking

C2

47µF

Feedback

condenser

Influence

Smaller Than

Recommended Value

Larger Than

Recommended Value

Related to pop noise at VCC→on.

Related to pop noise at VCC→on.

Determination of low cut−off frequency.

C2 =

1

2π・fL・Rf

Remarks

Related to gain.

Refer to item 4.

C3

220µF

Ripple

reduction

Time constant is small

at VCC→on or off.

Time constant is large

at VCC→on or off.

C4

0.12µF

Oscillation

prevention

Made liable to

oscillate.

Oscillation allowance.

Refer to item 3.

For filtering power supply hum and ripple.

C5

1000µF

Ripple filter

Large at using AC rectified power supply.

Small at using DC power supply.

C6

1000PF

Oscillation

prevention

Oscillation allowance improved.

Noise reduction

Refer to item 3.

5

2006-04-28

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