LM831 National Semiconductor, LM831 Datasheet - Page 9
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LM831
Manufacturer Part Number
LM831
Description
LM831 Low Voltage Audio Power Amplifier
Manufacturer
National Semiconductor
Datasheet
1.LM831.pdf
(14 pages)
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LM831 Circuit Description
The power supply is applied to Pin 9 and is filtered by resis-
tor R
Pin 16 is used to bias all of the LM831 circuits except the
power output stage Resistor R
that sets the output DC voltage for optimum output power
for any given supply voltage
Feedback is provided to the input transistor Q
R
6
and R
1
and capacitor C
7
BY
on Pin 16 This filtered voltage at
0
generates a biasing current
Refer to the external component diagram and equivalent schematic
1
External Component Diagram
emitter by
9
The capacitor C
mum DC accuracy
Q
the output load from Q
Bootstrapping of Pin 5 by C
swing and improved supply rejection
R
2
5
is provided for bridge (BTL) operation
provides voltage gain and the rest of the devices buffer
NF
on Pin 2 provides unity DC gain for maxi-
2
’s collector
BS
allows maximum output
TL H 6754 – 12