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參數(shù)資料
| 型號： | LM391 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | LM391 Audio Power Driver |
| 中文描述： | LM391音頻功率驅(qū)動器 |
| 文件頁數(shù)： | 3/12頁 |
| 文件大小： | 236K |
| 代理商： | LM391 |
Typical Performance Characteristics
Output Power vs Supply Voltage
Frequency (R
L
e
8
X
)
Total Harmonic Distortion vs
Frequency (R
L
e
4
X
)
Total Harmonic Distortion vs
Open Loop Gain vs Frequency
Rejection vs Frequency
Input Referred Power Supply
AB Bias Current
Total Harmonic Distortion vs
TL/H/7146–4
Pin Descriptions
Pin No.
Pin Name
Comments
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
a
Input
b
Input
Compensation
Ripple Filter
Sink Output
BIAS
BIAS
Source Output
Output Sense
a
Current Limit
a
SOA Diode
b
SOA Diode
b
Current Limit
Shutdown
V
a
V
b
Audio input
Feedback input
Sets the dominant pole
Improves negative supply rejection
Drives output devices and is emitter of AB bias V
BE
multiplier
Base of V
BE
multiplier
Collector of V
BE
multiplier
Drives output devices
Biases the IC and is used in protection circuits
Base of positive side protection circuit transistor
Diode used for dual slope SOA protection
Diode used for dual slope SOA protection
Base of negative side protection circuit transistor
Shuts off amplifier when current is pulled out of pin
Positive supply
Negative supply
3
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