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參數(shù)資料
| 型號： | TA8277H |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 28 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封裝： | HZIP-25 |
| 文件頁數(shù)： | 7/12頁 |
| 文件大小： | 290K |
| 代理商： | TA8277H |
TA8277H
2002-02-13
4
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 k.
The muting function have to be controlled by a transistor, FET and
-COM port which has IMUTE >
50
A ability.
– Conventional Method –
VCC
Large current capacity switch
BATTERY
VCC
FROM
MICROCOMPUTER
BATTERY
RELAY
VCC
Small current capacity switch
BATTERY
Stand-By
VCC
DIRECTLY FROM
MICROCOMPUTER
BATTERY
Stand-By
– Stand-by Switch Method –
Figure 3
Figure 5
Mute Attenuation
VMUTE (V)
Point A voltage: VMUTE (V)
ATT – VMUTE
Mut
e
a
tte
nu
ati
o
n
A
T
(dB
)
R1 = 2.2 k
R1 = 5 k
VCC = 13.2 V
Po = 10 W
RL = 4
f
= 1 kHz
100
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
80
60
40
30
20
0
10
90
70
50
Figure 4
Muting Function
R1
I (20
A)
22
IMUTE
IMUTE (OFF)
A
VMUTE
C
4
25
C
7
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