LM2879 [NSC]
LM2879 Dual 8W Audio Amplifier; LM2879双8W音频放大器
| 型号： | LM2879 |
| 厂家： | 
National Semiconductor |
| 描述： | LM2879 Dual 8W Audio Amplifier |
| 文件： | 总8页 (文件大小：174K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
February 1995
LM2879 Dual 8W Audio Amplifier
General Description
The LM2879 is a monolithic dual power amplifier which of-
fers high quality performance for stereo phonographs, tape
players, recorders, AM-FM stereo receivers, etc.
Y
Self-centering biasing
Y
Y
Y
4 MX input impedance
Internal current limiting
Internal thermal protection
The LM2879 will deliver 8W/channel to an 8X load. The
amplifier is designed to operate with a minimum of external
components and contains an internal bias regulator to bias
each amplifier. Device overload protection consists of both
internal current limit and thermal shutdown.
Applications
Y
Multi-channel audio systems
Y
Tape recorders and players
Y
Movie projectors
Features
Y
VO
Y
Automotive systems
A
typical 90 dB
Y
Stereo phonographs
Y
Y
Y
9W per channel (typical)
60 dB ripple rejection
Y
Bridge output stages
Y
AM-FM radio receivers
70 dB channel separation
Y
Intercoms
Y
Servo amplifiers
Y
Instrument systems
Connection Diagram and Typical Application
Stereo Amplifier
Plastic Package
TL/H/5291–1
Order Number LM2879T
See NS Package Number TA11B
TL/H/5291–2
FIGURE 1
C
1995 National Semiconductor Corporation
TL/H/5291
RRD-B30M115/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.
b
a
65 C to 150 C
Storage Temperature
§
§
Junction Temperature
150 C
§
Lead Temp. (Soldering, 10 seconds)
ESD rating to be determined.
Thermal Resistance
260 C
§
Supply Voltage
35V
g
a
Input Voltage (Note 1)
Operating Temperature (Note 2)
0.7V
0 C to
§
70 C
§
i
1 C/W
§
JC
i
43 C/W
§
JA
e
e
e
e
8X, A 50 (34 dB), unless otherwise specified.
V
Electrical Characteristics V 28V, T
25 C, R
§
S
TAB
L
Parameter
Total Supply Current
Operating Supply Voltage
Output Power/Channel
Distortion
Conditions
Min
Typ
Max
65
Units
mA
V
e
P
0W
12
O
6
6
32
e
e
e
e
1 kHz, THD 10%, T 25 C
TAB
f
f
8
W
§
e
1 W/Channel
1 kHz, R
e
8X
L
0.05
1
%
P
O
e
b
S
Output Swing
R
L
8X
V
6V
Vp-p
e
e
1 kHz, Output Referred
e
Channel Separation
C
50 mF, C
0.1 mF
BYPASS
IN
e
b
b
b
f
50
50
70
dB
dB
V
4 Vrms
O
e
120 Hz, Output Referred
e
0.1 mF
PSRR Positive Supply
C
f
50 mF, C
IN
BYPASS
e
b
b
60
60
e
V
1 Vrms
ripple
PSRR Negative Supply
Common-Mode Range
Measured at DC, Input Referred
dB
V
g
Split Supplies 15V, Pin 1
Tied to Pin 11
g
13.5
Input Offset Voltage
Noise
10
mV
Equivalent Input Noise
e
e
BW 20 20 kHz
R
S
0, C
e
0.1 mF
IN
b
CCIR ARM
2.5
3.0
0.8
mV
mV
mV
#
Output Noise Wideband
e
e
e
0.1 mF, A 200
V
R
S
0, C
IN
e
e
e
8X
Open Loop Gain
Input Bias Current
Input Impedance
DC Output Voltage
Slew Rate
R
51X, f 1 kHz, R
70
100
4
dB
nA
S
L
Open Loop
MX
V
e
V
S
28V
14
2
V/ms
kHz
A
Power Bandwidth
Current Limit
3 dB Bandwidth at 2.5W
65
1.5
g
Note 1: The input voltage range is normally limited to 0.7V with respect to pin 1. This range may be extended by shorting pin 1 to the positive supply.
Note 2: For operation at ambient temperature greater than 25 C, the LM2879 must be derated based on a maximum 150 C junction temperature. Thermal
§
§
resistance, junction to case, is 3 C/W. Thermal resistance, case to ambient, is 40 C/W.
§
§
Typical Performance Characteristics
Device Dissipation vs
Ambient Temperature
Open Loop Gain vs
Frequency
Power Dissipation vs
Power Output
TL/H/5291–3
2
Typical Performance Characteristics (Continued)
Channel Separation
(Referred to the Output)
Frequency
Supply Current vs Output
Power
Supply Rejection vs
Frequency
TL/H/5291–4
3
Equivalent Schematic Diagram
4
Typical Applications
Two-Phase Motor Drive
TL/H/5291–6
12W Bridge Amplifier
TL/H/5291–7
5
Typical Applications (Continued)
Simple Stereo Amplifier with Bass Boost
TL/H/5291–8
Power Op Amp (Using Split Supplies)
TL/H/5291–9
6
Typical Applications (Continued)
Stereo Phonograph Amplifier with Bass Tone Control
TL/H/5291–10
Frequency Response of
Bass Tone Control
TL/H/5291–11
7
Physical Dimensions inches (millimeters)
11-Lead TO-220 Power Package (T)
Order Number LM2879T
NS Package Number TA11B
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 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
National Semiconductor
Europe
National Semiconductor
Hong Kong Ltd.
National Semiconductor
Japan Ltd.
a
1111 West Bardin Road
Arlington, TX 76017
Tel: 1(800) 272-9959
Fax: 1(800) 737-7018
Fax:
(
49) 0-180-530 85 86
@
13th Floor, Straight Block,
Ocean Centre, 5 Canton Rd.
Tsimshatsui, Kowloon
Hong Kong
Tel: (852) 2737-1600
Fax: (852) 2736-9960
Tel: 81-043-299-2309
Fax: 81-043-299-2408
Email: cnjwge tevm2.nsc.com
a
a
a
a
Deutsch Tel:
English Tel:
Fran3ais Tel:
Italiano Tel:
(
(
(
(
49) 0-180-530 85 85
49) 0-180-532 78 32
49) 0-180-532 93 58
49) 0-180-534 16 80
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.
相关型号：
©2020 ICPDF网 联系我们和版权申明