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TDA7266P 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:
PowerSSO-24
描述:
STMICROELECTRONICS TDA7266P 音频功率放大器, AB, 2通道, 6 W, 3.5V 至 12V, PowerSSO, 24 引脚
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符号图
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引脚图
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页面导航:
引脚图在P2Hot
封装尺寸在P10
技术参数、封装参数在P2P12
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TDA7266P数据手册
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TDA7266P
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3 APPLICATIVE SUGGESTIONS
3.1 STAND-BY AND MUTE FUNCTIONS
3.1.1 (A) Microprocessor Application
In order to avoid annoying "Pop-Noise" during Turn-On/Off transients, it is necessary to guarantee the right St-
by and mute signals sequence.It is quite simple to obtain this function using a microprocessor (Fig. 4 and 5).
At first St-by signal (from
µ
P) goes high and the voltage across the St-by terminal (Pin 11) starts to increase
exponentially. The external RC network is intended to turn-on slowly the biasing circuits of the amplifier, this to
avoid "POP" and "CLICK" on the outputs.
When this voltage reaches the St-by threshold level, the amplifier is switched-on and the external capacitors in
series to the input terminals (C1, C3) start to charge.
It's necessary to mantain the mute signal low until the capacitors are fully charged, this to avoid that the device
goes in play mode causing a loud "Pop Noise" on the speakers.
A delay of 100-200ms between St-by and mute signals is suitable for a proper operation.
Figure 4. Microprocessor Application
5
6
8
Vref
ST-BY
11
IN1
C1 0.22µF
V
CC
187
D03AU1533
+
-
-
+
OUT1+
OUT1-
20
19
17
MUTE
10
IN2
C3 0.22µF
+
-
-
+
OUT2+
OUT2-
24
14
S-GND
PW-GND
C5
470µF
C6
100n
F
R1 10K
C2
10µF
µP
R2 10K
C4
1µF
1
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