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LM4876 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM4876
Description  1.1W Audio Power Amplifier with Logic Low Shutdown
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM4876 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LM4876
1.1W Audio Power Amplifier with Logic Low Shutdown
General Description
The LM4876 is a single 5V supply bridge-connected audio
power amplifier capable of delivering 1.1W (typ) of continu-
ous average power to an 8
Ω load with 0.5% THD+N.
Like other audio amplifiers in the Boomer series, the LM4876
is designed specifically to provide high quality output power
with a minimal amount of external components. The LM4876
does not require output coupling capacitors, bootstrap ca-
pacitors, or snubber networks. It is perfectly suited for low-
power portable systems.
The LM4876 features an active low externally controlled,
micro-power shutdown mode. Additionally, the LM4876 fea-
tures an internal thermal shutdown protection mechanism.
For PCB space efficiency, the LM4876 is available in MSOP
and SO surface mount packages.
The unity-gain stable LM4876’s closed loop gain is set using
external resistors.
Key Specifications
j THD+N at 1kHz for 1W continuous
average output power into 8
0.5% (max)
j Output power at 1kHz into 8
with 10% THD+N
1.5W (typ)
j Shutdown current
0.01µA (typ)
j Supply voltage range
2.0V to 5.5V
Features
n
Does not require output coupling capacitors, bootstrap
capacitors, or snubber circuits
n
10-pin MSOP and 8-pin SO packages
n
Unity-gain stable
n
External gain set
Applications
n
Mobile Phones
n
Portable Computers
n
Desktop Computers
n
Low-Voltage Audio Systems
Typical Application
Boomer® is a registered trademark of National Semiconductor Corporation.
10129901
FIGURE 1. Typical LM4876 Audio Amplifier Application Circuit.
Numbers in ( ) are specific to the 10-pin MSOP package
March 2003
© 2003 National Semiconductor Corporation
DS101299
www.national.com


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