參數(shù)資料
型號(hào): LM4883SQ/NOPB
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 0.4 W, 2 CHANNEL, AUDIO AMPLIFIER, QCC24
封裝: LLP-24
文件頁數(shù): 12/23頁
文件大?。?/td> 1244K
代理商: LM4883SQ/NOPB
Typical Application
External Components Description
(Refer to Figure 1)
Components
Functional Description
1.
R1, 4, 5, 6
The inverting input resistance R1, along with R
3, set the closed-loop gain. R1, along with C1,
form a high pass filter with f
c = 1/(2
πR
1C1).
2.
C1, 2, 3, 4
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. C
1, along with
R
1, create a highpass filter with fc = 1/(2
πR
1C1). Refer to the section, SELECTING PROPER
EXTERNAL COMPONENTS, for an explanation of determining the value of C
1.
3.
R2, 3, 7, 8
The feedback resistance, along with R
1 sets the closed-loop gain.
4.
C6
The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING section for
information about properly placing, and selecting the value of, this capacitor.
5.
C5
The capacitor, C
5, 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
5’s value.
200887A1
FIGURE 1. Typical Audio Amplifier Application Circuit
LM4883
www.national.com
2
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