參數(shù)資料
型號(hào): LM4880N
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: Dual 250 mW Audio Power Amplifier with Shutdown Mode
中文描述: 0.325 W, 2 CHANNEL, AUDIO AMPLIFIER, PDIP8
封裝: 0.300 INCH, MDIP-8
文件頁(yè)數(shù): 4/12頁(yè)
文件大小: 375K
代理商: LM4880N
Automatic Shutdown Circuit
Automatic Switching Circuit
External Components Description
(Figure 1)
Components
Functional Description
1.
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 high pass 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 closed-loop gain in conjunction with R
i
.
2.
C
i
3.
R
F
DS012343-3
FIGURE 2. Automatic Shutdown Circuit
DS012343-4
FIGURE 3. Automatic Switching Circuit
www.national.com
4
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