參數(shù)資料
型號： LM831N
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, PDIP16
封裝： 0.300 INCH, PLASTIC, DIP-16
文件頁數(shù)： 9/14頁
文件大小： 309K
代理商： LM831N
LM831 Circuit Description
Refer to the external component diagram and equivalent schematic.
The power supply is applied to Pin 9 and is filtered by resis-
tor R
1
and capacitor C
BY
on Pin 16. This filtered voltage at
Pin 16 is used to bias all of the LM831 circuits except the
power output stage. Resistor R
0
generates a biasing current
that sets the output DC voltage for optimum output power
for any given supply voltage.
Feedback is provided to the input transistor Q
1
emitter by
R
6
and R
7
.
The capacitor C
NF
on Pin 2 provides unity DC gain for maxi-
mum DC accuracy.
Q
2
provides voltage gain and the rest of the devices buffer
the output load from Q
2
’s collector.
Bootstrapping of Pin 5 by C
BS
allows maximum output
swing and improved supply rejection.
R
5
is provided for bridge (BTL) operation.
External Component Diagram
TL/H/6754–12
9
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