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參數資料
| 型號： | LM831M |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | LM831 Low Voltage Audio Power Amplifier |
| 中文描述： | 0.22 W, 2 CHANNEL, AUDIO AMPLIFIER, PDSO16 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-16 |
| 文件頁數： | 11/14頁 |
| 文件大?。?/td> | 309K |
| 代理商： | LM831M |
External Components
(Refer to External Component Diagram)
Component
Comments
Min
Max
C
O
Required to stabilize output stage.
0.33
m
F
1
m
F
C
c
Output coupling capacitors for Dual Mode. Sets a low-frequency pole in
the frequency response.
100
m
F
10,000
m
F
f
L
e
1
2
q
C
c
R
L
C
BS
Bootstrap capacitors. Sets a low-frequency pole in the power BW.
Recommended value is
22
m
F or
(short Pins
4 & 12 to 9)
470
m
F
C
BS
e
1
10
#
2
q
#
f
L
#
R
L
C
S
Supply bypass. Larger values improve low-battery performance by
reducing supply ripple.
47
m
F
10,000
m
F
C
BY
Filters the supply for improved low-voltage operation. Also sets
turn-on delay.
47
m
F
470
m
F
C
NF
Sets a low-frequency response. Also affects turn-on delay.
10
m
F
100
m
F
f
L
e
1
2
q
#
C
NF
#
(R
AV
a
80)
In BTL Mode, C
NF
on Pin 15 can be reduced without affecting the
frequency response. However, the turn-on ‘‘POP‘‘ will be worsened.
C
BTL
Used only in the Bridge Mode. Connects the output of the first amplifier to
the inverting input of the other through an internal resistor. Sets a low-
frequency pole in one-half the frequency response.
0.1
m
F
1
m
F
f
L
e
1
2
q
#
C
BTL
#
16k
C
BW
Improves clipping waveform and sets the high-frequency bandwidth.
Works with an internal 16k resistor. (This equation applies for R
AV
i
0.
For 46 dB application, see BW–C
BW
curve.)
See table below
f
H
e
1
2
q
#
C
BW
#
16k
R
AV
Used to reduce the gain and improve the distortion and signal to noise. If
this is desired, C
BW
must also be used.
See table below
Typical A
V
R
AV
C
BW
Min
Max
46 dB
Short
Open
4700 pF
40 dB
82
100 pF
4700 pF
34 dB
240
270 pF
4700 pF
28 dB
560
500 pF
4700 pF
11
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