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CM8662 Datasheet(PDF) 4 Page - Bookly Micro electronic

No. de Pieza. CM8662
Descripción  1.7W CMOS AUDIO AMP
Descarga  8 Pages
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Fabricante  BOOKLY [Bookly Micro electronic]
Página de inicio  http://www.bookly.com/
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CM8662 Datasheet(HTML) 4 Page - Bookly Micro electronic

   
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CM8662
BOOKLY MICRO
1.7W CMOS AUDIO AMP
2004/05/30
www.bookly.com
Page 4
AUTOMATIC SWITCHING CIRCUIT
Audio
Input
20k
Ω
RL
0.33uF
+
-
1uF
2
20k
Ω
0.33uF
0.1uF
VDD
20k
Ω
Rp
1 MΩ
20kΩ
0.1uF
VDD
100uF
Ro
1 kΩ
1uF
CM8608
CM8662
3
4
6
7 1
5
8
2
3
4
1
8
To CM8662 Channel B
Output (Pin 7) via
Coupling Capacitor
Control Pin
Headphone Jack
+
+
+
+
+
EXTERNAL COMPONENTS DESCRIPTION (Figure 1)
Components
Functional Description
1
Ri
Inverting input resistance which sets the closed-loop gain in conjunction with Rf. This resistor also
forms a high pass filter with Ci and fc = 1/(2πRiCi)
2
Ci
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with Ri at fc = 1/(2πRiCi). Refer to the section, Proper Selection of External
Components, for an explanation of how to determine the value of Ci.
3
RF
Feedback resistance which sets the closed-loop gain in conjunction with Ri.
4
CS
Supply bypass capacitor which provides power supply filtering. Refer to the Power Supply Bypassing
section for proper placement and selection of the supply bypass capacitor.
5
CB
Bypass pin capacitor which provides half-supply filtering. Refer to the Proper Selection of External
Components section for proper placement and selection of the half-supply bypass capacitor.


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