參數(shù)資料
型號(hào)： LM4858
廠商： National Semiconductor Corporation
英文描述： Mono 1.5 W / Stereo 300mW Power Amplifier
中文描述： 單聲道1.5瓦/ 300mW的立體聲功率放大器
文件頁(yè)數(shù)： 5/17頁(yè)
文件大小： 683K
代理商： LM4858
External Components Description
See
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 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
.
Output coupling capacitor which blocks the DC voltage at the amplifier’s output. Forms a high pass filter
with the single-ended load R
L
at f
O
= 1/(2
π
R
L
C
O
).
2.
C
i
3.
4.
R
f
C
s
5.
C
B
6.
C
O
Typical Performance Characteristics
LD Specific Characteristics
LM4858LD
THD+N vs Frequency
LM4858LD
THD+N vs Frequency
200647A5
200647A6
LM4858LD
THD+N vs Output Power
LM4858LD
THD+N vs Output Power
200647A7
200647A8
L
www.national.com
5
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