CM8662 Champion Microelectronic Corp., CM8662 Datasheet - Page 4

• Manufacturer Part Number: CM8662
• Description: AUDIO POWER AMP WITH SHUTDOWN MODE
• Manufacturer: Champion Microelectronic Corp.

AUTOMATIC SWITCHING CIRCUIT
EXTERNAL COMPONENTS DESCRIPTION
Components
1
2
3
4
5
2003/02/11
Audio
Input
R
C
R
C
C
i
i
F
S
B
Rev. 1.0
0.33uF
+
0.33uF
+
20k
Functional Description
Inverting input resistance which sets the closed-loop gain in conjunction with R
forms a high pass filter with C
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
Components, for an explanation of how to determine the value of C
Feedback resistance which sets the closed-loop gain in conjunction with R
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.
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.
Ω
1uF
20k
1uF
Ω
+
Champion Microelectronic Corporation
+
20kΩ
2
3
4
3
CM8608
4
CM8662
+
2
-
8
6
7 1
i
VDD
VDD
at f
A
1
c
20k
UDIO
0.1uF
0.1uF
= 1/(2πR
Ω
5
8
i
and f
i
P
c
C
= 1/(2πR
i
). Refer to the section, Proper Selection of External
OWER
8Ω
RL
(Figure 1)
i
C
i
)
AMP. W
+
100uF
1 MΩ
Rp
ITH
1 kΩ
i
Ro
.
Control Pin
S
i
.
HUTDOWN
f
. This resistor also
To CM8662 Channel B
Output (Pin 7) via
Coupling Capacitor
CM8662
Headphone Jack
Page 4
M
ODE