LM831N National Semiconductor, LM831N Datasheet - Page 11

• Manufacturer Part Number: LM831N
• Description: Audio Amp Speaker 1-CH Mono/2-CH Stereo 0.44W Class-AB 16-Pin MDIP Rail
• Manufacturer: National Semiconductor

Specifications of LM831N

• Package: 16MDIP
• Function: Speaker
• Amplifier Type: Class-AB
• Typical Voltage Gain: 48 dB
• Total Harmonic Distortion Noise: 0.25@50mW %
• Typical Psrr: 46 dB
• Output Signal Type: Differential|Single
• Output Type: 1-Channel Mono|2-Channel Stereo
• Maximum Input Bias Current: 2@3V uA
• Maximum Load Resistance: 8 Ohm

External Components
Component
C
C
C
R
C
C
C
C
C
BTL
BW
BS
BY
NF
AV
O
S
c
Typical A
46 dB
40 dB
34 dB
28 dB
Required to stabilize output stage
Output coupling capacitors for Dual Mode Sets a low-frequency pole in
the frequency response
Bootstrap capacitors Sets a low-frequency pole in the power BW
Recommended value is
Supply bypass Larger values improve low-battery performance by
reducing supply ripple
Filters the supply for improved low-voltage operation Also sets
turn-on delay
Sets a low-frequency response Also affects turn-on delay
In BTL Mode C
frequency response However the turn-on ‘‘POP‘‘ will be worsened
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
Improves clipping waveform and sets the high-frequency bandwidth
Works with an internal 16k resistor (This equation applies for R
For 46 dB application see BW–C
Used to reduce the gain and improve the distortion and signal to noise If
this is desired C
V
NF
BW
(Refer to External Component Diagram)
on Pin 15 can be reduced without affecting the
must also be used
f
L
e
C
f
f
Short
R
BS
L
H
240
560
82
2
AV
e
f
e
L
Comments
e
e
2
2
C
BW
10 2
NF
2 C
C
curve )
C
BTL
(R
BW
1
1
1
1
c
1
AV
R
f
L
L
16k
16k
11
a
R
L
80)
100 pF
270 pF
500 pF
Open
Min
AV
i
0
C
BW
4
(short Pins
22 F or
0 33 F
100 F
0 1 F
47 F
47 F
10 F
Min
12 to 9)
See table below
See table below
4700 pF
4700 pF
4700 pF
4700 pF
Max
10 000 F
10 000 F
470 F
470 F
100 F
1 F
1 F
Max