TA8271HQ データシートの表示（PDF） - Toshiba
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TA8271HQ Datasheet PDF : 12 Pages
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TA8271HQ
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 kΩ.
The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE > 50
µA ability.
I (20 µA)
IMUTE (OFF)
25
22
R1
A
IMUTE
VMUTE
Figure 4 Muting Function
ATT – VMUTE
0
−10
R1 = 5 kΩ
−20
−30
−40
R1 = 2.2 kΩ
−50
−60
−70
VCC = 13.2 V
−80
Po = 10 W
−90
RL = 4 Ω
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
2004-05-10
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