TA8272H Просмотр технического описания (PDF) - Toshiba

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TA8272H

Max Power 43 W BTL × 4 ch Audio Power IC

Toshiba 

TA8272H

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)

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

ON/OFF.

The series resistance; R1 must be set up less than 10 kW.

The muting function have to be controlled by a transistor, FET and m-COM port which has IMUTE > 250

mA ability.

Terminal 22 must not be pulled up and it shall be controlled by OPEN/LOW.

I (100 mA)

IMUTE (OFF) 24

R1

A

IMUTE

VMUTE

ATT – VMUTE

20

10 kW

5 kW

0

-20

-40

-60

-80

-100

0

VCC = 13.2 V

Po = 10 W

RL = 4 W

f = 1 kHz

BW = 400 Hz~30 kHz

0.4 0.8 1 1.2 1.6

2

2.4 2.8 3

Point A voltage: VMUTE (V)

Figure 4 Muting Function

Figure 5 Mute Attenuation - VMUTE (V)

4

2002-06-20

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