LM4863(2016) 查看數據表（PDF） - Unisonic Technologies
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LM4863 Datasheet PDF : 12 Pages
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LM4863
CMOS IC
TYPICAL APPLICATION CIRCUIT
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
CB 10 Bypass VDD/2
Audio
Input
CI
1μF
(CB size)
0.33μF
RI
20KΩ
VDD
RF
11 -IN B
9 +IN B
50KΩ
+-AMP 1B
20KΩ
20KΩ
100kΩ
To Control Pin on
Headphone jack 100KΩ
1
16
Shutdown
HP-IN
CO
-OUT A 5
20KΩ
100µF
+
RL 1kΩ
CONTROL PIN
RING
+-AMP202AK+OΩUT
3
A
8Ω
To HP-IN Circuit
CO
-OUT B 12
100µF
+
TIP SLEEVE
HEADPHONE JACK
20KΩ
20KΩ
RL
+-AMP
2B
+OUT
B
14
8Ω
1kΩ
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
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QW-R107-027.E
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