Texas Instruments 6W Stereo Audio Power Amplifier LM4940TSBD/NOPB LM4940TSBD/NOPB Scheda Tecnica
Codici prodotto
LM4940TSBD/NOPB
SNAS219C – OCTOBER 2003 – REVISED MAY 2013
LM4940
6W Stereo Audio Power Amplifier
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FEATURES
DESCRIPTION
The LM4940 is a dual audio power amplifier primarily
23
•
Click and Pop Circuitry Eliminates Noise
designed for demanding applications in flat panel
During Turn-On and Turn-Off Transitions
monitors and TVs. It is capable of delivering 6 watts
•
Low Current, Active-Low Shutdown Mode
per channel to a 4
Ω
load with less than 10% THD+N
•
Low Quiescent Current
while operating on a 14.4V
DC
power supply.
•
Stereo 6W Output, R
L
= 4
Ω
Boomer™ audio power amplifiers were designed
specifically to provide high quality output power with a
specifically to provide high quality output power with a
•
Short Circuit Protection
minimal
amount
of
external
components.
The
•
Unity-Gain Stable
LM4940 does not require bootstrap capacitors or
•
External Gain Configuration Capability
snubber circuits. Therefore, it is ideally suited for
display applications requiring high power and minimal
display applications requiring high power and minimal
APPLICATIONS
size.
•
Flat Panel Monitors
The LM4940 features a low-power consumption
active-low shutdown mode. Additionally, the LM4940
active-low shutdown mode. Additionally, the LM4940
•
Flat Panel TVs
features an internal thermal shutdown protection
•
Computer Sound Cards
mechanism along with short circuit protection.
The LM4940 contains advanced pop and click
KEY SPECIFICATIONS
circuitry that eliminates noises which would otherwise
•
Quiscent Power Supply Current: 40mA (max)
occur during turn-on and turn-off transitions.
(SE)
The LM4940 is a unity-gain stable and can be
•
P
OUT
configured by external gain-setting resistors.
V
DD
= 14.4V, R
L
= 4
Ω
, 10% THD+N: 6 W (typ)
•
Shutdown Current: 40µA (typ)
TYPICAL APPLICATION
Figure 1. Typical Stereo Audio Amplifier Application Circuit
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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Boomer is a trademark of Texas Instruments, Inc.
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All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2013, Texas Instruments Incorporated
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.