LM4940 Datasheet | National Semiconductor

Description The LM4940 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV’s. 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 ponents. 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 & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4940 is a unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Quiscent Power Supply Current j POUT (SE) 40m A (max) 6W (typ) 40µA (typ) VDD = 14.4V, RL = 4Ω, 10% THD+N j Shutdown current Features n Pop & click circuitry eliminates noise during turn-on and turn-off transitions n Low current, active-low shutdown mode n Low quiescent current n Stereo 6W output, RL = 4Ω n Short circuit protection n Unity-gain stable n External gain configuration capability Applications n Flat Panel Monitors n Flat Panel TV’s n puter Sound Cards Typical Application FIGURE 1. Typical Stereo Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 2003 National Semiconductor Corporation DS200756 .national. http://.. Connection Diagram Plastic Package, TO-263 200756E7 Top View U = Wafer Fab Code Z = Assembly Plant Code XY = Date Code TT = Die Traceability Order Number LM4940TS See NS Package Number TS9A .national. Absolute Maximum Ratings 2) (Notes 1, ESD...