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參數(shù)資料
| 型號： | L4863-S18-T |
| 廠商： | 友順科技股份有限公司 |
| 元件分類： | 運動控制電子 |
| 英文描述： | DUAL 2.2W AUDIO AMPLIFIER PLUS STEREO HEADPHONE FUNCTION |
| 中文描述： | 雙2.2W的音頻放大器，還有立體聲耳機功能 |
| 文件頁數(shù)： | 4/10頁 |
| 文件大?。?/td> | 459K |
| 代理商： | L4863-S18-T |
L4863
CMOS IC
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
4 of 10
QW-R107-050,A
T Y PICAL APPLICAT ION CIRCUIT
SLEEVE
AMP 1A
+
20K
Ω
V
DD
C
S
0.1μF
TANT
-
R
F
20K
Ω
R
I
20K
Ω
Audio
Input
C
I
1
μ
F
20K
Ω
20K
Ω
-OUT A 5
3
+OUT A
R
L
8
Ω
C
O
100μF
+
1k
Ω
To HP-IN Circuit
50K
Ω
50K
Ω
V
DD
/2
- IN A
+IN A
Bypass
-IN B
+IN B
Shutdown
HP-IN
1
16
GND 2,7,15
100K
Ω
20K
Ω
R
F
20K
Ω
C
I
1
μ
F
Audio
Input
100k
Ω
V
DD
To Control Pin on
Headphone jack
20K
Ω
20K
Ω
20K
Ω
-OUT B
+OUT B
12
14
R
L
8
Ω
+
1k
Ω
CONTROL PIN
HEADPHONE JACK
TIP
10
11
9
8
6
4,13
AMP 1B
+
-
AMP 2A
+
-
AMP 2B
+
-
RING
C
B
(CB size)
0.33
μ
F
+
R
I
C
O
100μF
Note: Pin out shown for DIP-16 and SOP-16 packages. Refer to the PIN CONFIGURATION for the pin out of other
packages.
Figure 1.Typical Audio Amplifier Application Circuit
EXTERNAL COMPONENTS DESCRIPTION
Components
Functional Description
R
I
The inverting input resistance, along with R
F
, set the closed-loop gain. R
I
, along with C
I
form a high
pass filter with fc=1/(2
π
R
I
C
I
)
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. C
I
, along with R
I
,
create a high pass filter with fc=1/(2
π
R
I
C
I
). Refer to the section. Selecting Proper External
Components, for an explanation of determine the value of C
I
.
The feedback resistance, along with R
I
, 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, C
B
, 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
C
B
’S value.
C
I
R
F
C
S
C
B
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