10W High-Efficiency Mono BTL Audio Power Amplifier
LM4668 10W High-Efficiency Mono BTL Audio Power Amplifier
October 2004
LM4668 10W High-Efficiency Mono BTL Audio Power...
Description
LM4668 10W High-Efficiency Mono BTL Audio Power Amplifier
October 2004
LM4668 10W High-Efficiency Mono BTL Audio Power Amplifier
General 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 components. 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,
fIN = 1kHz, THD+N = 10%, RL = 8Ω)
j Quiescent Power Supply Current j Efficiency (VDD = 12V, fIN = 1kHz,
10W (typ) 30mA (typ) 79% (typ) 0.15mA (typ) 30dB (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 30dB
Applications
n Flat Panel Monitors n Flat Panel TVs n Computer Sound Cards
Connection Diagrams
LD Package MH Package
20089102
Top View Order Number LM...
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