參數(shù)資料
型號: LM4893MM
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類: 音頻/視頻放大
英文描述: 1.1 Watt Audio Power Amplifier
中文描述: 1.1 W, 1 CHANNEL, AUDIO AMPLIFIER, PDSO10
封裝: MSOP-10
文件頁數(shù): 5/22頁
文件大?。?/td> 705K
代理商: LM4893MM
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 amplifiers 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 information concerning proper placement and selection of the supply bypass capacitor.
Bypass pin capacitor which provides half-supply filtering. Refer to the section,
Proper Selection of External
Components
, for information concerning proper placement and selection of C
B
.
2.
C
i
3.
4.
R
f
C
S
5.
C
B
Typical Performance Characteristics
THD+N vs Frequency
at V
DD
= 5V, 8
R
L
, and PWR = 250mW
THD+N vs Frequency
at V
DD
= 3.0V, 8
R
L
, and PWR = 150mW
20038037
20038038
THD+N vs Frequency
at V
DD
= 2.6V, 8
R
L
, and PWR = 100mW
THD+N vs Frequency
at V
DD
= 2.6V, 4
R
L
, and PWR = 100mW
20038039
20038040
L
www.national.com
5
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