LM4863-N20-R 查看數據表（PDF） - Unisonic Technologies
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LM4863-N20-R Datasheet PDF : 11 Pages
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LM4863
CMOS IC
TYPICAL APPLICATION CIRCUIT
Audio
Input
Audio
Input
CI
RF
1µF 20KΩ 6
RI 8
20KΩ
VDD
+
CS
0.1µF
4,13
TANT
- IN A
+IN A
+-AMP 1A
20KΩ
50KΩ
10
CB
Bypass VDD/2
CI
1µF
(CB size)
0.33µF
RI
20KΩ
VDD RF
11 -IN B
9 +IN B
50KΩ
+-AMP210BKΩ
20KΩ
CO
-OUT A 5
100µF
+
20KΩ
CONTROL PIN
RL 1kΩ
RING
- 20KΩ
+AMP
2A
+OUT
3
A
8Ω
To HP-IN Circuit
CO
-OUT B 12
100µF
+
TIP SLEEVE
HEADPHONE JACK
20KΩ
20KΩ
RL
-
14
8Ω
1kΩ
100kΩ
To Control Pin on
1
16
Shutdown
HP-IN
+AMP
2B
+OUT
B
Headphone jack 100KΩ
GND 2,7,15
Note: Pin out shown for DIP-16. Refer to the PIN CONFIGURATION for the pin out of other packages.
Figure 1.Typical Audio Amplifier Application Circuit
EXTERNAL COMPONENTS DESCRIPTION
Components
RI
CI
RF
CS
CB
Functional Description
The inverting input resistance, along with RF, set the closed-loop gain. RI, along with CI form a high
pass filter with fc=1/(2πRICI)
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. CI, along with RI,
create a high pass filter with fc=1/(2πRICI). Refer to the section. Selecting Proper External
Components, for an explanation of determine the value of CI.
The feedback resistance, along with RI, set the closed-Ioop gain.
The supply bypass capacitor. Refer to the Power Supply Bypassing section for information about
properly placing and selecting the value of, this capacitor.
The capacitor, CB, filters the half-supply voltage present on the Bypass pin. Refer to the Selecting
Proper External Components section for information concerning proper placement and selecting
CB’S value.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
5 of 11
QW-R107-027.D
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