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參數(shù)資料
| 型號(hào)： | LM2896P |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | LM1896/LM2896 Dual Audio Power Amplifier |
| 中文描述： | 2.5 W, 2 CHANNEL, AUDIO AMPLIFIER, PSFM11 |
| 封裝： | PLASTIC, TO-202, SIP-11 |
| 文件頁(yè)數(shù)： | 5/10頁(yè) |
| 文件大?。?/td> | 266K |
| 代理商： | LM2896P |
Typical Applications
(Continued)
TL/H/7920–7
6, 9 No connection on LM1896
( ) Indicates pin number for LM2896
TL/H/7920–8
FIGURE 2. Stereo Amplifier with A
V
e
200, BW
e
30 kHz
External Components
(Figure 2)
Components
1. R2, R5, R10, R13
Comments
Sets voltage gain, A
V
e
1
a
R5/R2 for one channel and A
V
e
1
a
R10/R13
for the other channel.
Bootstrap resistor sets drive current for output stage and allows pins 3 and 12 to
go above V
S
.
Works with C
o
to stabilize output stage.
Input coupling capacitor. Pins 1 and 14 are at a DC potential of V
S
/2. Low
frequency pole set by:
1
2
q
R
IN
C1
Feedback capacitors. Ensure unity gain at DC. Also a low frequency pole at:
1
2
q
R2C2
Bootstrap capacitors, used to increase drive to output stage. A low frequency
pole is set by:
1
2
q
R3C3
Compensation capacitor. These stabilize the amplifiers and adjust their
bandwidth. See curve of bandwidth vs allowable gain.
Improves power supply rejection (See Typical Performance Curves). Increasing
C7 increases turn-on delay.
Output coupling capacitor. Isolates pins 5 and 10 from the load. Low frequency
pole set by:
1
2
q
C
c
R
L
Works with R
o
to stabilize output stage.
Provides power supply filtering.
2. R3, R12
3. R
o
4. C1, C14
f
L
e
5. C2, C13
f
L
e
6. C3, C12
f
L
e
7. C5, C10
8. C7
9. C
c
f
L
e
10. C
o
11. C
S
5
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| LM1896 | LM1896/LM2896 Dual Audio Power Amplifier |
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