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TA8271HQ Datasheet(PDF) 4 Page - Toshiba Semiconductor

No. de pieza TA8271HQ
Descripción Electrónicos  Max Power 41 W BTL X 4 ch Audio Power IC
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Fabricante Electrónico  TOSHIBA [Toshiba Semiconductor]
Página de inicio  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TA8271HQ Datasheet(HTML) 4 Page - Toshiba Semiconductor

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TA8271HQ
2004-05-10
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 kΩ.
The muting function have to be controlled by a transistor, FET and µ-COM port which has IMUTE > 50
µA 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
R1 = 2.2 kΩ
R1 = 5 kΩ
VCC = 13.2 V
Po = 10 W
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
−80
−60
−40
−30
−20
0
−10
−90
−70
−50
Figure 4
Muting Function
R1
I (20
µA)
22
IMUTE
IMUTE (OFF)
A
VMUTE
25


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