LM4663

LM4663 Description

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LM4663 Datasheet (PDF)

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LM4663 Features

• Delta-sigma modulator.
• Two stereo input selector.
• "Click and pop" suppression circuitry.
• Micropower shutdown mode.
• 24 lead TSSOP package (No heatsink required).
• Stereo headphone amplifier.

LM4663 Description

The LM4663 is a fully integrated single supply, high efficiency Class D audio power amplifier solution. The LM4663 utilizes a continuous time delta-sigma modulation technique that lowers output noise and THD when compared to conventional pulse width modulators.

The LM4663 also features a stereo headphone amplifier that delivers 80mW into a 32 headset with less than 0.5% THD. The LM4663 has two stereo inputs that can be selected to drive either the headphone amplifier or the Class D amplifier. All amplifiers are protected with thermal shutdown.

In standby mode, the LM4663 draws an extremely low 2ľA supply current. With a 4 load, the IC's efficiency for a 250mW power level is 69%, reaching 83% at a power level of 2W. The IC features click and pop reduction circuitry that minimizes audible popping during device turn-on and turn-off. The LM4663 is available in a 24-lead TSSOP package, ideal for portable and desktop computer applications.

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