TA8210AHQ Ver la hoja de datos (PDF) - Toshiba

Número de pieza

componentes Descripción

Fabricante

TA8210AHQ

20W BTL × 2ch Audio Power Amplifier

Toshiba 

TA8210AHQ/ALQ

3. Preventive measure against oscillation

For preventing the oscillation, it is advisable to use C4, the condenser of polyester film having small

characteristic fluctuation of the temperature and the frequency.

The resistance R to be series applied to C4 is effective for phase correction of high frequency, and improves the

oscillation allowance.

Since the oscillation allowance is varied according to the causes described below, perform the temperature test to

check the oscillation allowance.

(1) Voltage gain to be used (GV setting)

(2) Capacity value of condenser

(3) Kind of condenser

(4) Layout of printed board

In case of its use with the voltage gain GV reduced or with the feedback amount increased, care must be taken

because the phase−inversion is caused by the high frequency resulting in making the oscillation viably

generated.

4. Input offset prevention circuit at VCC→on

Having Pre−Amp (Amp 1) mounted on the primary stage, this IC contains the circuit for making the Amp 1 input

voltage and the NF terminal voltage equipotential.

Therefore, the offset voltage produced at the input stage is suppressed to prevent the pop noise at VCC→on. The

capacity values of the input and NF condenser (C1 and C2) shall be set according to the gain to be used.

(Reference) (A) At GV = 50dB (Rf = 0Ω)

C1 = 4.7µF, C2 = 47µF

(B) At GV = 40dB (Rf = 470Ω)

C1 = 3.3µF, C2 = 33µF

4

2006-04-28

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