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PDF LM4881M Data sheet ( Hoja de datos )
| Número de pieza | LM4881M | |
| Descripción | Dual 200 mW Headphone Amplifier with Shutdown Mode | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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September 1997
LM4881
Dual 200 mW Headphone Amplifier with Shutdown Mode
General Description
The LM4881 is a dual audio power amplifier capable of deliv-
ering 200 mW of continuous average power into an 8Ω load
with 0.1% (THD) from a 5V power supply.
Boomer audio power amplifiers were designed specifically to
provide high quality output power with a minimal amount of
external components using surface mount packaging. Since
the LM4881 does not require bootstrap capacitors or snub-
ber networks, it is optimally suited for low-power portable
systems.
The LM4881 features an externally controlled, low power
consumption shutdown mode which is virtually clickless and
popless, as well as an internal thermal shutdown protection
mechanism.
The unity-gain stable LM4881 can be configured by external
gain-setting resistors.
Key Specifications
n THD at 1 kHz at 125 mW
continuous average output
power into 8Ω
n THD at 1 kHz at 75 mW continuous
average output power into 32Ω
n Output power at 10% THD+N
at 1 kHz into 8Ω
n Shutdown Current
0.1% (max)
0.02% (typ)
300 mW (typ)
0.7 µA (typ)
Features
n MSOP surface mount packaging
n Unity-gain stable
n External gain configuration capability
n Thermal shutdown protection circuitry
n No bootstrap capacitors, or snubber circuits are
necessary
Applications
n Headphone Amplifier
n Personal Computers
n Microphone Preamplifier
Typical Application
Connection Diagrams
MSOP Package
DS100005-2
SOP and DIP Package
DS100005-1
*Refer to the Application Information Section for information concerning
proper selection of the input and output coupling capacitors.
FIGURE 1. Typical Audio Amplifier Application Circuit
DS100005-38
Top View
Order Number LM4881MM, LM4881M, or LM4881N
See NS Package Number MUA08A, M08A, or N08E
Boomer® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS100005
www.national.com
1 page  
Typical Performance Characteristics (Continued)
THD+N vs Output Power
THD+N vs Output Power
THD+N vs Output Power
DS100005-9
THD+N vs Output Power
DS100005-10
THD+N vs Output Power
DS100005-11
THD+N vs Output Power
Output Power vs
Supply Voltage
DS100005-12
Output Power vs
Supply Voltage
DS100005-13
Output Power vs
Supply Voltage
DS100005-14
DS100005-15
DS100005-16
DS100005-17
5 www.national.com
5 Page 
Physical Dimensions inches (millimeters) unless otherwise noted (Continued)
Order Number LM4881N
NS Package Number N08E
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: [email protected]
www.national.com
National Semiconductor
Europe
Fax: +49 (0) 1 80-530 85 86
Email: [email protected]
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: [email protected]
National Semiconductor
Japan Ltd.
Tel: 81-3-5639-7560
Fax: 81-3-5639-7507
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.
11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet LM4881M.PDF ] | |
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