參數(shù)資料
型號(hào)： TS4604IPT
廠商： STMICROELECTRONICS
元件分類： 音頻／視頻放大
英文描述： 0.065 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO28
封裝： 0.65 MM PITCH, ROHS COMPLIANT, TSSOP-28
文件頁(yè)數(shù)： 18/31頁(yè)
文件大?。?/td> 644K
代理商： TS4604IPT
TS4604
Application information
Doc ID 17913 Rev 1
25/31
Figure 54.
TS4604 with IPAD for ESD immunity
6.11
Pop-&-click circuitry
Thanks to the internal negative supply the headphone and line driver outputs are referred to
ground without the need for bulky in-series capacitors. As a result, the pop created by these
bulky capacitors is eliminated. In addition, the TS4604 includes a pop-&-click circuitry that
suppresses any residual pop on the outputs, thus enabling the outputs to be virtually pop-&-
click-free.
6.12
Start-up phase
To further improve the pop-&-click performance, two important points must be taken into
account during the start-up phase.
Input capacitor
During the start up phase, as long as the AC input coupling capacitors are not fully charged,
we suggested to remain the EN_LD and En_HP and/or Ext_UVP pin low.
The constant time for an RC filter is given by:
We can consider that the input capacitor Cin will be charged at 95% of its maximum value
at:
OUT_R
OUT_L
A1
A2
B2
Gnd
IPAD
Gnd
+
-
+
InR-
InR+
InL-
InL+
OUT_R
OUT_L
TS4604
C1
C2
AM06147
τ
Rin
Cin
=
T3
τ
=
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