LM1877
Dual Audio Power Amplifier
General Description
The LM1877 is a monolithic dual power amplifier designed to
deliver 2W/channel continuous into 8Ωloads. The LM1877 is
designed to operate with a low number of external compo-
nents, and still provide flexibility for use in stereo phono-
graphs, tape recorders and AM-FM stereo receivers, etc.
Each power amplifier is biased from a common internal regu-
lator to provide high power supply rejection, and output Q
point centering. The LM1877 is internally compensated for
all gains greater than 10.
Features
n2W/channel
n−65 dB ripple rejection, output referred
n−65 dB channel separation, output referred
nWide supply range, 6V–24V
nVery low cross-over distortion
nLow audio band noise
nAC short circuit protected
nInternal thermal shutdown
Applications
nMulti-channel audio systems
nStereo phonographs
nTape recorders and players
nAM-FM radio receivers
nServo amplifiers
nIntercom systems
nAutomotive products
Connection Diagram
Dual-In-Line Package
or Surface Mount Package
DS007913-1
Top View
Order Number LM1877M-9 or LM1877N-9
See NS Package Number M14B or N14A
February 1995
LM1877 Dual Audio Power Amplifier
© 1999 National Semiconductor Corporation DS007913 www.national.com
Equivalent Schematic Diagram
DS007913-2
www.national.com 2
Absolute Maximum Ratings (Note 1)
If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage 26V
Input Voltage ±0.7V
Operating Temperature 0˚C to +70˚C
Storage Temperature −65˚C to +150˚C
Junction Temperature 150˚C
Lead Temperature
N-Package Soldering (10 sec.) 260˚C
M-Package Infared (15 sec.) 220˚C
M-Package Vapor Phase (60 sec.) 215˚C
Thermal Resistance
θ
JC
(N-Package) 30˚C/W
θ
JA
(N-Package) 79˚C/W
θ
JC
(M-Package) 27˚C/W
θ
JA
(M-Package) 114˚C/W
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to
the device may occur. Operating Ratings indicate conditions for which the de-
vice is functional, but do not guarantee specific performance limits.
Electrical Characteristics
V
S
=20V, T
A
=25˚C, (Note 2) R
L
=8Ω,A
V
=50 (34 dB) unless otherwise specified
Parameter Conditions Min Typ Max Units
Total Supply Current P
O
=0W 25 50 mA
Output Power THD =10%
LM1877 V
S
=20V, R
L
=8Ω2.0 W/Ch
V
S
=12V, R
L
=8Ω1.3 W/Ch
Total Harmonic Distortion
LM1877 f =1 kHz, V
S
=14V
P
O
=50 mW/Channel 0.075 %
P
O
=500 mW/Channel 0.045 %
P
O
=1 W/Channel 0.055 %
Output Swing R
L
=8ΩV
S
−6 Vp-p
Channel Separation C
F
=50 µF, C
IN
=0.1 µF,
f=1 kHz, Output Referred
V
S
=20V, V
O
=4 Vrms −50 −70 dB
V
S
=7V, V
O
=0.5 Vrms −60 dB
PSRR Power Supply C
F
=50 µF, C
IN
=0.1 µF,
Rejection Ratio f =120 Hz, Output Referred
V
S
=20V, V
RIPPLE
=1 Vrms −50 −65 dB
V
S
=7V, V
RIPPLE
=0.5 Vrms −40 dB
Noise Equivalent Input Noise
R
S
=0, C
IN
=0.1 µF, 2.5 µV
BW =20 Hz–20 kHz, Output Noise Wideband
R
S
=0, C
N
=0.1 µF, A
V
200 0.80 mV
Open Loop Gain R
S
=0, f =100 kHz, R
L
=8Ω70 dB
Input Offset Voltage 15 mV
Input Bias Current 50 nA
Input Impedance Open Loop 4 MΩ
DC Output Level V
S
=20V 9 10 11 V
Slew Rate 2.0 V/µs
Power Bandwidth 65 kHz
Current Limit 1.0 A
Note 2: For operation at ambient temperature greater than 25˚C, the LM1877 must be derated based on a maximum 150˚C junction temperature.
www.national.com3
Typical Performance Characteristics
Device Dissipation vs
Ambient Temperature
DS007913-10
Power Supply Rejection Ratio
(Referred to the Output) vs
Frequency
DS007913-11
Power Supply Rejection Ratio
(Referred to the Output) vs
Frequency
DS007913-12
Power Supply Rejection Ratio
(Referred to the Output) vs
Supply Voltage
DS007913-13
Channel Separation (Referred
to the Output) vs Frequency
DS007913-14
Channel Separation (Referred
to the Output) vs Frequency
DS007913-15
Average Supply Current vs
P
OUT
DS007913-16
Total Harmonic Distortion
vs Frequency
DS007913-17
Total Harmonic Distortion
vs Frequency
DS007913-18
www.national.com 4
Typical Performance Characteristics (Continued)
Typical Applications
Power Dissipation (W)
Both Channels Operating
DS007913-19
Open Loop Gain vs
Frequency
DS007913-20
Output Swing vs Supply
Voltage
DS007913-21
Stereo Phonograph Amplifier with Bass Tone Control
DS007913-4
www.national.com5
Typical Applications (Continued)
Frequency Response of Bass Tone Control
DS007913-5
Inverting Unity Gain Amplifier
DS007913-6
Stereo Amplifier with A
V
=200
DS007913-7
www.national.com 6
Typical Applications (Continued)
Non-Inverting Amplifier Using Split Supply
DS007913-8
Typical Split Supply
DS007913-9
www.national.com7
Physical Dimensions inches (millimeters) unless otherwise noted
Molded SOIC Package (M)
Order Number LM1877M-9
NS Package Number M14B
www.national.com 8
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
LIFE SUPPORT POLICY
NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or
systems which, (a) are intended for surgical implant
into the body, or (b) support or sustain life, and
whose failure to perform when properly used in
accordance with instructions for use provided in the
labeling, can be reasonably expected to result in a
significant injury to the user.
2. A critical component is any component of a life
support device or system whose failure to perform
can be reasonably expected to cause the failure of
the life support device or system, or to affect its
safety or effectiveness.
National Semiconductor
Corporation
Americas
Tel: 1-800-272-9959
Fax: 1-800-737-7018
Email: support@nsc.com
National Semiconductor
Europe Fax: +49 (0) 1 80-530 85 86
Email: europe.support@nsc.com
Deutsch Tel: +49 (0) 1 80-530 85 85
English Tel: +49 (0) 1 80-532 78 32
Français Tel: +49 (0) 1 80-532 93 58
Italiano Tel: +49 (0) 1 80-534 16 80
National Semiconductor
Asia Pacific Customer
Response Group
Tel: 65-2544466
Fax: 65-2504466
Email: sea.support@nsc.com
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
www.national.com
Molded Dual-In-Line Package (N)
Order Number LM1877N-9
NS Package Number N14A
LM1877 Dual Audio Power Amplifier
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.
National P/N LM1877 - Dual Audio Power Amplifier
See A/D Converters
Products
Products > Analog - Amplifiers > Operational Amplifiers > High Output Power > 100mA > LM1877
LM1877 Product Folder
Dual Audio Power Amplifier
Generic P/N 1877
General
Description Features Datasheet Package
& Models Samples
& Pricing Design
Tools Application
Notes
Parametric Table Parametric Table
Channels (Channels) 2
Input Output Type Not Rail to Rail
Bandwidth, typ (MHz) 5
Slew Rate, typ (Volts/usec) 2
Supply Current per Channel, typ (mA) 12.50
Minimum Supply Voltage (Volt) 6
Maximum Supply Voltage (Volt) 26
Offset Voltage, Max (mV) 15
Input Bias Current, Temp Max (nA) 50
Output Current, typ (mA) 1000
Voltage Noise, typ (nV/Hz) -
Shut down No
Special Features AvCl>10
Datasheet
Title Size in
Kbytes Date View Online Download Receive via
Email
LM1877 Dual Audio Power Amplifier 257
Kbytes
24-
Jun-
99 View Online Download Receive via
Email
LM1877 Dual Audio Power Amplifier (JAPANESE)328
Kbytes
View Online
Download
Receive via
Email
If you have trouble printing or viewing PDF file(s), see Printing Problems.
Package Availability, Models, Samples & Pricing
Part Number Package Status Models Samples &
Electronic
Orders
Budgetary
Pricing Std
Pack
Size
Package
Marking
Type Pins MSL SPICE IBIS Qty $US each
LM1877M-9 SOIC
WIDE 14 MSL Full
production N/A N/A
24 Hour
Samples
Buy Now
1K+ $0.6000 rail
of
50
[logo]¢U¢Z¢2¢T
LM1877M
-9
LM1877MX-9 SOIC
WIDE 14 MSL Full
production N/A N/A
Buy Now
1K+ $0.6000 reel
of
1000
[logo]¢U¢Z¢2¢T
LM1877M
-9
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1877.html (1 of 3) [Aug-09-2002 1:40:24 PM]
National P/N LM1877 - Dual Audio Power Amplifier
LM1877N-9A MDIP 14 MSL Lifetime buy N/A N/A
Buy Now
1K+ $0.5500 rail
of
25
[logo]¢U¢Z¢3¢T¢P
LM1877N-9A
LM1877N-9 MDIP 14 MSL Full
production N/A N/A
24 Hour
Samples
Buy Now
1K+ $0.6600 rail
of
25
[logo]¢U¢Z¢3¢T
LM1877N-9
LM1877-9
MDC Die Full
production N/A N/A
Samples
N/A -
LM1877-9
MWC Wafer Full
production N/A N/A
wafer
jar
of
N/A
-
General Description
The LM1877 is a monolithic dual power amplifier designed to deliver 2W/channel continuous into 8 Ohm
loads. The LM1877 is designed to operate with a low number of external 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 LM1877 is internally compensated for all gains greater than 10.
Features
● 2W/channel
● -65 dB ripple rejection, output referred
● -65 dB channel separation, output referred
● Wide supply range, 6V-24V
● Very low cross-over distortion
● Low audio band noise
● AC short circuit protected
● Internal thermal shutdown
Applications
● Multi-channel audio systems
● Stereo phonographs
● Tape recorders and players
● AM-FM radio receivers
● Servo amplifiers
● Intercom systems
● Automotive products
Design Tools
Title Size in Kbytes Date View Online Download Receive via Email
Amplifiers Selection Guide
software for Windows 7 Kbytes 12-Jun-2002 View
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1877.html (2 of 3) [Aug-09-2002 1:40:24 PM]
National P/N LM1877 - Dual Audio Power Amplifier
If you have trouble printing or viewing PDF file(s), see Printing Problems.
Application Notes
Title Size in Kbytes Date View Online Download Receive via Email
SB-111: Mass Storage - Hard
Disk 82 Kbytes 28-Jun-96 View Online Download Receive via Email
If you have trouble printing or viewing PDF file(s), see Printing Problems.
[Information as of 5-Aug-2002]
Search Design Purchasing Quality Company Home
About Languages . Website Guide . About "Cookies" . National is QS 9000 Certified . Privacy/Security Statement .
Contact Us . Site Terms & Conditions of Use . Copyright 2002 © National Semiconductor Corporation . My Preferences .
Feedback
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1877.html (3 of 3) [Aug-09-2002 1:40:24 PM]
