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参数资料
| 型号： | TA8252H |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 24 W, 4 CHANNEL, AUDIO AMPLIFIER, PZFM25 |
| 封装： | 1.27 MM PITCH, PLASTIC, HZIP-25 |
| 文件页数： | 9/14页 |
| 文件大小： | 358K |
| 代理商： | TA8252H |
TA8252H
2002-10-30
4
― Stand
-by switch method ―
(Fig.3)
3. Multing function (pin(24))
By means of controlling pin(24) less than 0.5V, it can make the audio muting condition.
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 15k, we recommend 10k.
The muting function have to be controlled by a transistor, FET and -COM port which has
IMUTE > 250A ability.
Terminal (24) must not be pulled up and it shall be controlled by open / low.
(Fig.4) Muting function
(Fig.5) Mute attenuation
-Vmute (V)
VCC
Large current capacity switch
Battery
－
Conventional Method －
VCC
Relay
Battery
From
microcomputer
VCC
Stand-By
Small current capacity switch
Battery
VCC
Stand-By
Battery
Directly from
microcomputer
IMUTE
VMUTE
R1
C
4
IMUTE(OFF)
I(100A)
24
A
ATT – Vmute
Pin(24) voltage : Vmute (V)
Mut
e
a
tte
nu
ati
o
n
A
T
(
dB
)
20
100
0
20
40
60
80
0.4
0.8
1.2
1.6
2
2.4
2.8
R1 = 15k
10k
5k
VCC = 13.2 V
Po = 10 W
RL = 4
f = 1 kHz
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