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TS4999 Datasheet(PDF) 27 Page - STMicroelectronics

Part # TS4999
Description  Filter-free stereo 2.8 W class D audio power amplifier with selectable 3D sound effects
PDF  36 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

TS4999 Datasheet(HTML) 27 Page - STMicroelectronics

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TS4999
Application information
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Figure 57.
Wake-up phase
When the standby command is set, the time required to set the output stage to high
impedance and to put the internal circuitry in shutdown mode is called the standby time.
This time is used to decrease the gain from its nominal value set by the digital pins G0 and
G1 to mute and avoid any pop noise during shutdown. The gain decreases smoothly until
the outputs are muted. See Figure 58: Shutdown phase.
Figure 58.
Shutdown phase
Preset gain
Gain increasing
t
WU-A
t
WU
t
WU-B
STBY
Mute
Time
Time
Gain
STBY
Level
STBY
LO
HI
Mute
Preset gain
t
STBY
STBY
Time
Time
Gain
STBY
Level
Gain decreasing
LO
HI
Mute
STBY
Mute



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