LM4668 Datasheet | National Semiconductor

Description The LM4668 is a high efficiency switching audio power amplifier primarily designed for demanding applications in flat panel monitors and TV’s. It is capable of delivering 6W to an 8Ω mono BTL load with less than 1% distortion (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 LM4668 features a micro-power, active-low shutdown mode, an internal thermal shutdown protection mechanism, and short circuit protection. The LM4668 contains advanced transient (“pop and click”) suppression circuitry that eliminates noises that would otherwise occur during turn-on and turn-off transitions. Key Specifications j Power Output BTL (VDD = 14V, f IN = 1k Hz, THD+N = 10%, RL = 8Ω) j Quiescent Power Supply Current j Efficiency (VDD = 12V, f IN = 1k Hz, 10W (typ) 30m A (typ) 79% (typ) 0.15m A (typ) 30d B (typ) RL = 8Ω, POUT = 6W) j Shutdown Current j Fixed Gain Features n Soft-start circuitry eliminates noise during turn-on transition n Low current shutdown mode n Low quiescent current n 6W BTL output, RL = 8Ω n Short circuit protection n Fixed, internally set gain of 30d B Applications n Flat Panel Monitors n Flat Panel TVs n puter Sound Cards Connection Diagrams LD Package MH Package Top View Order Number LM4668LD See NS Package Number LDC14A 200891G3 Top View Order Number LM4668MH See NS Package Number MXA20A Boomer ® is a registered trademark of National Semiconductor Corporation. © 2004 National Semiconductor Corporation DS200891 .national. Typical Application FIGURE 1. Typical Audio Amplifier Application Circuit (- Zetex ZHCS506) .national. Absolute Maximum Ratings (Notes 1, 2) If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. Supply Voltage Storage Temperature Input Voltage Power...