TA8271H Ver la hoja de datos (PDF) - Toshiba

Número de pieza

componentes Descripción

Fabricante

TA8271H

Max Power 41 W BTL x 4 ch Audio Power IC

Toshiba 

TA8271H

Large current capacity switch

BATTERY

VCC

VCC

– Conventional Method –

RELAY

BATTERY

FROM

MICROCOMPUTER

Small current capacity switch

BATTERY

DIRECTLY FROM

MICROCOMPUTER

Stand-By VCC

Stand-By VCC

– Stand-by Switch Method –

BATTERY

Figure 3

3. Muting Function (pin 22)

By means of controlling pin 22 less than 0.5 V, it can make the audio muting condition.

The muting time constant is decided by R1, C4 and C8 and these parts is related the pop noise at power

ON/OFF.

The series resistance; R1 must be set up less than 5 kW.

The muting function have to be controlled by a transistor, FET and m-COM port which has IMUTE > 50

mA ability.

I (20 mA)

IMUTE (OFF)

25

22

R1

A

IMUTE

VMUTE

Figure 4 Muting Function

ATT – VMUTE

0

-10

R1 = 5 kW

-20

-30

-40

R1 = 2.2 kW

-50

-60

-70

VCC = 13.2 V

-80

Po = 10 W

-90

RL = 4 W

f = 1 kHz

-100

1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8

Point A voltage: VMUTE (V)

Figure 5 Mute Attenuation - VMUTE (V)

4

2002-02-13

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