LM4866 2.2W Stereo Audio Amplifier
October 2002
LM4866
2.2W Stereo Audio Amplifier
General Description
The LM4866 is a bridge-connected (BTL) stereo audio
power amplifier which, when connected to a 5V supply,
delivers 2.2W to a 4鈩?load (Note 1) or 2.5W to a 3鈩?load
(Note 2) with less than 1.0% THD+N.
With the LM4866 packaged in the LLP, the customer benefits
include low thermal impedance, low profile, and small size.
This package minimizes PCB area and maximizes output
power.
The LM4866 features an externally controlled, low-power
consumption shutdown mode, and thermal shutdown protec-
tion. It also utilizes circuitry to reduce 鈥渃licks and pops鈥?/div>
during device turn-on.
Boomer audio power amplifiers are designed specifically to
use few external components and provide high quality output
power in a surface mount package.
Note 1:
An LM4866MTE or LM4866LQ that has been properly mounted to
a circuit board will deliver 2.2W into 4鈩? The other package options for the
LM4866 will deliver 1.1W into 8鈩? See the Application Information sections
for further information concerning the LM4866MTE and LM4866LQ.
Note 2:
An LM4866MTE or LM4866LQ that has been properly mounted to a
circuit board will deliver 2.5W into 3鈩?
Key Specifications
n
P
O
at 1% THD+N
n
LM4866LQ, 3鈩? 4鈩?loads
n
LM4866MTE, 3鈩? 4鈩?loads
n
LM4866MTE, 8鈩?load
n
LM4866MT, 8鈩?load
n
Shutdown current
n
Supply voltage range
2.5W(typ), 2.2W(typ)
2.5W(typ), 2.2W(typ)
1.1W(typ)
1.1W(typ)
0.7碌A(chǔ)(typ)
2.0V to 5.5V
Features
n
n
n
n
n
Stereo BTL amplifier mode
鈥淐lick and pop鈥?suppression circuitry
Unity-gain stable
Thermal shutdown protection circuitry
TSSOP and Exposed-DAP LLP packages
Applications
n
Multimedia monitors
n
Portable and desktop computers
n
Portable televisions
Typical Application
20018601
Note: Pin out shown for LLP package. Refer to the Connection Diagrams for the pinout of the TSSOP package.
Boomer
廬
is a registered trademark of National Semiconductor Corporation.
漏 2002 National Semiconductor Corporation
DS200186
www.national.com
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