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參數(shù)資料
| 型號(hào)： | LM4862N |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | 675 mW Audio Power Amplifier with Shutdown Mode |
| 中文描述： | 0.825 W, 1 CHANNEL, AUDIO AMPLIFIER, PDIP8 |
| 封裝： | 0.300 INCH, MDIP-8 |
| 文件頁(yè)數(shù)： | 3/10頁(yè) |
| 文件大?。?/td> | 262K |
| 代理商： | LM4862N |
Automatic Switching Circuit
External Components Description
(Figure 1)
Components
1.
Functional Description
R
i
Inverting input resistance which sets the closed-loop gain in conjunction with R
f
. This resistor also forms a
high pass filter with C
i
at f
c
= 1/(2
π
R
i
C
I
).
Input coupling capacitor which blocks the DC voltage at the amplifier’s input terminals. Also creates a
highpass filter with R
i
at f
c
= 1/(2
π
R
i
C
i
). Refer to the section,
Proper Selection of External Components,
for an explanation of how to determine the value of C
i
.
Feedback resistance which sets the closed-loop gain in conjunction with R
i
.
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.
2.
C
i
3.
4.
R
F
C
S
5.
C
B
DS012342-21
FIGURE 2. Automatic Switching Circuit
www.national.com
3
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