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LM4940 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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LM4940 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 23 page 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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