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TDA7266D13TR 数据手册 - ST Microelectronics（意法半导体）
制造商:
ST Microelectronics（意法半导体）
分类:
音频放大器
封装:
PowerSO-20
描述:
2声道 立体声 5 W AB类 22引脚 (20+2Tab) PowerSO 卷盘
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
引脚图在P2Hot
封装尺寸在P7
技术参数、封装参数在P2P13
导航目录
TDA7266D13TR数据手册
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of 13 Go
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5/13
TDA7266D
Figure 2. Microprocessor Driving Signals
B) Low Cost Application
In low cost applications where the mP is not present, the suggested circuit is shown in fig.3.
The St-by and mute terminals are tied together and they are connected to the supply line via an external voltage
divider.
The device is switched-on/off from the supply line and the external capacitor C4 is intended to delay the St-by
and mute threshold exceeding, avoiding "Popping" problems.
So to avoid any popping or clicking sond, it is important to clock:
a Correct Sequence: At turn-ON, the Stand-by must be removed at first, then the Mute must be re-
leased after a delay of about 100-200ms. On the contrary at turn-OFF the Mute must be activated
as first and then the Stand-by.
With the values suggested in the Application circuit the right operation is guaranteed.
b Correct Threshold Voltages: In order to avoid that due to the spread in the internal thresholds (see
the above limits) a wrong external voltage causes uncertain commutations for the two functions we
suggest to use the following values:
Mute for Vcc>6.4V : VT = 2.3V
Mute for Vcc<6.4V : VT = Vcc/2 - 1
Stand-by : VT = 0.8V
+V
S
(V)
V
IN
(mV)
V
ST-BY
pin 9
I
q
(mA)
ST-BY
MUTE
PLAY MUTE ST-BY
+18
1.8
0.8
V
MUTE
pin 8
4.1
2.3
OFF
OFF
D02AU1411
V
OUT
(V)
2.9
1.3
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