TA8277 TOSHIBA [Toshiba Semiconductor], TA8277 Datasheet - Page 4

• Manufacturer Part Number: TA8277
• Description: MAX POWER 43 W BTL x 4 CH AUDIO POWER IC
• Manufacturer: TOSHIBA [Toshiba Semiconductor]

3. Muting Function
ON/OFF.
50 mA ability.
I
MUTE (OFF)
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 R
The series resistance; R
The muting function have to be controlled by a transistor, FET and m-COM port which has I
I (20 mA)
Figure 4 Muting Function
25
22
Stand-By
(pin 22)
V
CC
I
1
MUTE
R
must be set up less than 5 kW.
Small current capacity switch
1
Large current capacity switch
V
CC
V
MUTE
BATTERY
A
– Stand-by Switch Method –
BATTERY
– Conventional Method –
1
Figure 3
, C
4
4
and C
Figure 5 Mute Attenuation - - - - V
8
-100
DIRECTLY FROM
MICROCOMPUTER
-10
-20
-30
-40
-50
-60
-70
-80
-90
and these parts is related the pop noise at power
0
1.2
V
Stand-By
CC
1.4
Point A voltage: V MUTE (V)
1.6
R 1 = 5 kW
V
RELAY
CC
ATT – V
1.8
R 1 = 2.2 kW
2.0
MUTE
FROM
MICROCOMPUTER
2.2
BATTERY
BATTERY
V CC = 13.2 V
P o = 10 W
R L = 4 W
f = 1 kHz
2.4
2.6
MUTE
2002-02-13
TA8277H
MUTE
2.8
(V)
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