TA8252HQ TOSHIBA Semiconductor CORPORATION, TA8252HQ Datasheet - Page 4

• Manufacturer Part Number: TA8252HQ
• Description: Max Power 37w Btl ? 4ch Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

3. Multing function (pin(24))
I
By means of controlling pin(24) less than 0.5V, 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 µ−COM port which has
I
Terminal (24) must not be pulled up and it shall be controlled by open / low.
MUTE
MUTE
I(100µA)
(Fig.4) Muting function
(OFF)
> 250µA ability.
24
I
MUTE
R
Stand-By
1
1
V
must be set up less than 15kΩ, we recommend 10kΩ.
MUTE
A
V
CC
Small current capacity switch
V
CC
Large current capacity switch
Battery
Battery
－ Conventional Method －
1
― Stand−by switch method ―
and C
4
and these parts is related the pop noise at power on / off.
(Fig.3)
4
Directly from
microcomputer
Stand-By
V
−100
−20
−40
−60
−80
CC
20
0
0
Relay
V
0.4
(Fig.5) Mute attenuation−V mute (V)
CC
Pin(24) voltage : V
0.8
Battery
From
microcomputer
Battery
R1 = 15kΩ
ATT – V
1.2
mute
1.6
10kΩ
mute
V CC = 13.2 V
Po = 10 W
RL = 4 Ω
f = 1 kHz
2
(V)
5kΩ
2.4
TA8252HQ
2006-04-28
2.8