LM4950 Datasheet | National Semiconductor

Description The LM4950 is a dual audio power amplifier primarily designed for demanding applications in flat panel monitors and TV’s. It is capable of delivering 3.1 watts per channel to a 4Ω single-ended load with less than 1% THD+N or 7.5 watts mono BTL to an 8Ω load, with less than 10% THD+N from a 12VDC power supply. Boomer audio power amplifiers were designed specifically to provide high quality output power with a minimal amount of external ponents. The LM4950 does not require bootstrap capacitors or snubber circuits. Therefore, it is ideally suited for display applications requiring high power and minimal size. The LM4950 features a low-power consumption active-low shutdown mode. Additionally, the LM4950 features an internal thermal shutdown protection mechanism along with short circuit protection. The LM4950 contains advanced pop & click circuitry that eliminates noises which would otherwise occur during turn-on and turn-off transitions. The LM4950 is a unity-gain stable and can be configured by external gain-setting resistors. Key Specifications j Quiscent Power Supply Current j POUT (SE) 16m A (typ) 3.1W (typ) 7.5W (typ) 40µA (typ) VDD = 12V, RL = 4Ω, 1% THD+N j POUT (BTL) VDD = 12V, RL = 8Ω, 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 3.1W output, RL = 4Ω n Mono 7.5W BTL output, RL = 8Ω 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 Bridge-Tied-Load (BTL) Audio Amplifier Application Circuit Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200470 .national. Connection Diagrams Plastic Package, TO-263 Top View U = Wafer Fab Code Z = Assembly Plant Code...