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TB2959HQ Datasheet(PDF) 7 Page - Toshiba Semiconductor

Part No. TB2959HQ
Description  Maximum Power 47W BTL 4-ch Audio Power IC
Download  24 Pages
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
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TB2959HQ Datasheet(HTML) 7 Page - Toshiba Semiconductor

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TB2959HQ
2011-11-08
7
8. Mute switch
The audio mute switch is enabled by setting pin 22 Low. R1 and C4 determine the time constant of the
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.
For example, when the control voltage is changed from 5 V to 3.3 V, the pull-up resistor should be:
3.3 V/5 V
 47 k  31 k
Figure 3 Mute Function
Figure 4 Mute Attenuation
 VMUTE (V)
22
1 k
R1
5 V
Mute On/Off
control
C4
Pin 22 control voltage: VMUTE E (V)
ATT – VMUTE
0
120
100
80
60
40
20
0
20
0.5
1
1.5
2
2.5
3


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