LM4940

LM4940 www.ti.com SNAS219C – OCTOBER 2003 – REVISED MAY 2013 LM4940 6W Stereo Audio Power Amplifier Check for Samples: LM4940 FEATURES 1 23 Click and Pop Circuitry Eliminates Noise During Turn-On and Turn-Off Transitions Low Current, Active-Low Shutdown Mode Low Quiescent Current Stereo 6W Output, RL = 4Ω Short Circuit Protection Unity-Gain Stable External Gain Configuration Capability APPLICATIONS Flat Panel Monitors Flat Panel TVs Computer Sound Cards KEY SPECIFICATIONS Quiscent Power Supply Current: 40mA (max) (SE) POUT VDD = 14.4V, RL = 4Ω, 10% THD+N: 6 W (typ) Shutdown Current: 40µA (typ) DESCRIPTION The LM4940 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TVs. It is capable of delivering 6 watts per channel to a 4Ω load with less than 10% THD+N while operating on a 14.4VDC power supply. Boomer™ audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external components. The LM4940 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size. The LM4940 features a low-power consumption active-low shutdown mode. Additionally, the LM4940 features an internal thermal shutdown protection mechanism along with short circuit protection. The LM4940 contains advanced pop and click circuitry that eliminates noises which would otherwise occur duri...