TL H 7933
LM2877
Dual
4W
Audio
Power
Amplifier
February 1995
LM2877 Dual 4W Audio Power Amplifier
General Description
The LM2877 is a monolithic dual power amplifier designed
to deliver 4W channel continuous into 8X loads
The
LM2877 is designed to operate with a low number of exter-
nal components and still provide flexibility for use in stereo
phonographs tape recorders and AM-FM stereo receivers
etc Each power amplifier is biased from a common internal
regulator to provide high power supply rejection and output
Q point centering The LM2877 is internally compensated
for all gains greater than 10 and comes in an 11-lead sin-
gle-in-line package
Features
Y
4W channel
Y
b
68 dB ripple rejection output referred
Y
b
70 dB channel separation output referred
Y
Wide supply range 6-24V
Y
Very low cross-over distortion
Y
Low audio band noise
Y
AC short circuit protected
Y
Internal thermal shutdown
Applications
Y
Multi-channel audio systems
Y
Stereo phonographs
Y
Tape recorders and players
Y
AM-FM radio receivers
Y
Servo amplifiers
Y
Intercom systems
Y
Automotive products
Connection Diagram
(Single-In-Line Package)
TL H 7933 1
Top View
Order Number LM2877P
See NS Package Number P11A
Pin 6 must be connected to GND
C1995 National Semiconductor Corporation
RRD-B30M75 Printed in U S A
Absolute Maximum Ratings
If Military Aerospace specified devices are required
please contact the National Semiconductor Sales
Office Distributors for availability and specifications
Supply Voltage
26V
Input Voltage
g
0 7V
Operating Temperature
0 C to
a
70 C
Storage Temperature
b
65 C to
a
150 C
Junction Temperature
150 C
Lead Temperature (Soldering 10 sec )
260 C
Thermal Resistance
i
JC
10 C W
i
JA
55 C W
Electrical Characteristics
V
S
e
20V T
TAB
e
25 C R
L
e
8X A
V
e
50 (34 dB) unless otherwise specified
Parameter
Conditions
Min
Typ
Max
Units
Total Supply Current
P
O
e
0W
25
50
mA
Operating Supply Voltage
6
24
V
Output Power Channel
f
e
1 kHz THD
e
10% T
TAB
e
25 C
V
S
e
20V
4 0
4 5
W
V
S
e
18V
3 6
W
V
S
e
12V R
L
e
4X
1 5
1 9
W
V
S
e
12V R
L
e
8X
1 0
W
Distortion THD
f
e
1 kHz V
S
e
20V
P
O
e
50 mW Channel
0 1
%
P
O
e
1W Channel
0 07
1
%
P
O
e
2W Channel
0 07
%
f
e
1 kHz V
S
e
12V R
L
e
4X
P
O
e
50 mW Channel
0 25
%
P
O
e
500 mW Channel
0 20
%
P
O
e
1W Channel
0 15
1
%
Output Swing
R
L
e
8X
V
S
b
4
V
p-p
Channel Separation
C
F
e
50 mF C
IN
e
0 1 mF f
e
1 kHz
Output Referred
V
S
e
20V V
O
e
4 Vrms
b
50
b
70
dB
V
S
e
7V V
O
e
0 5 Vrms
b
60
dB
PSRR Power Supply
C
F
e
50 mF C
IN
e
0 1 mF f
e
120 Hz
Rejection Ratio
Output Referred
V
S
e
20V V
RIPPLE
e
1 Vrms
b
50
b
68
dB
V
S
e
7V V
RIPPLE
e
0 5 Vrms
b
40
dB
Noise
Equivalent Input Noise
R
S
e
0 C
IN
e
0 1 mF BW
e
20 Hz 20 kHz
2 5
m
V
Output Noise Wideband
R
S
e
0 C
IN
e
0 1 mF A
V
e
200
0 80
mV
Open Loop Gain
R
S
e
0 f
e
1 kHz R
L
e
8X
70
dB
Input Offset Voltage
15
mV
Input Bias Current
50
nA
Input Impedance
Open Loop
4
MX
DC Output Level
V
S
e
20V
9
10
11
V
Slew Rate
2 0
V ms
Power Bandwidth
65
kHz
Current Limit
1 0
A
Note 1
For operation at ambient temperature greater than 25 C the LM2877 must be derated based on a maximum 150 C junction temperature using a thermal
resistance which depends upon device mounting techniques
2
Equivalent Schematic Diagram
TLH7933
2
3
Typical Performance Characteristics
Ambient Temperature
Device Dissipation vs
Frequency
(Referred to the Output) vs
Power Supply Rejection Ratio
Frequency
(Referred to the Output) vs
Power Supply Rejection Ratio
Supply Voltage
(Referred to the Output) vs
Power Supply Rejection Ratio
to the Output) vs Frequency
Channel Separation (Referred)
to the Output) vs Frequency
Channel Separation (Referred)
Power Output
Average Supply Current vs
vs Frequency
Total Harmonic Distortion
vs Frequency
Total Harmonic Distortion
Power Output
Power Dissipation vs
Frequency
Open Loop Gain vs
Voltage
Output Swing vs Supply
TL H 7933 3
4
Typical Applications
Stereo Phonograph Amplifier with Bass Tone Control
TL H 7933 4
Frequency Response of Bass Tone Control
TL H 7933 5
5
PDF 
ZIP