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LM4940 Scheda tecnica(PDF) 1 Page - Texas Instruments

Il numero della parte LM4940
Spiegazioni elettronici  6W Stereo Audio Power Amplifier
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Produttore elettronici  TI1 [Texas Instruments]
Homepage  http://www.ti.com
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LM4940
www.ti.com
SNAS219B – MAY 2004 – REVISED MARCH 2011
LM4940
6W Stereo Audio Power Amplifier
Check for Samples: LM4940
1
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 14.4VDC power supply.
Stereo 6W Output, RL = 4Ω
Boomer™ audio power amplifiers were designed
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
APPLICATIONS
size.
Flat Panel Monitors
The LM4940 features a low-power consumption
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
POUT
configured by external gain-setting resistors.
VDD = 14.4V, RL = 4Ω, 10% THD+N: 6 W (typ)
Shutdown Current: 40µA (typ)
TYPICAL APPLICATION
Figure 1. Typical Stereo Audio Amplifier Application Circuit
1
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.
2
Boomer is a trademark of Texas Instruments, Inc.
3
All other trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2004–2011, 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.


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