tb2959hq TOSHIBA Semiconductor CORPORATION, tb2959hq Datasheet - Page 7

• Manufacturer Part Number: tb2959hq
• Description: Maximum Power 47w Btl  4-ch Audio Power Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

8.
Mute switch
mute. The time constant affects pop noise generated when power or the mute is turned on or off; thus, it
must be determined on a per-application basis.
The value of the external pull-up resistor is determined, based on pop noise value.
The audio mute switch is enabled by setting pin 22 Low. R
For example, when the control voltage is changed from 5 V to 3.3 V, the pull-up resistor should be:
5 V
R
1
3.3 V/5 V  47 k  31 k
Figure 3 Mute Function
C
4
22
1 k
Mute On/Off
control
7
Figure 4 Mute Attenuation V
100
120
20
40
60
80
1
20
0
and C
0
Pin 22 control voltage: V
0.5
4
determine the time constant of the
1
ATT – V
1.5
MUTE
MUTE
2
TB2959HQ
E
MUTE
2011-11-08
2.5
(V)
(V)
3