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Features
Soft-start circuitry eliminates noise during turn-on transition
Low current shutdown mode
Low quiescent current
6W BTL output, RL = 8Ω
Short circuit protection
Fixed, internally set gain of 30dB
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 Specification
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Power Output BTL (VDD = 14V,
fIN = 1kHz, THD+N = 10%, RL = 8Ω)
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10W (typ)
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Quiescent Power Supply Current
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30mA (typ)
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Efficiency (VDD = 12V, fIN = 1kHz,
RL = 8Ω, POUT = 6W)
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79% (typ)
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Shutdown Current
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0.15mA (typ)
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Fixed Gain
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30dB (typ)
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Applications
Flat Panel Monitors
Flat Panel TVs
Computer Sound Cards
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