Stereo headphone amp doubles audio playback time
Using a Class G architecture, the LM48824 PowerWise stereo headphone amplifier is claimed to offer the industry’s lowest power consumption only 0.9 mA typ of quiescent current. The part doubles the audio playback time of smart phones, full-featured mobile phones, and portable music players with its adaptive power supply approach that enables very low supply rails, which doubles the power efficiency compared to typical Class AB headphone amplifiers.
The amplifier includes a 32-step I2 C-compatible volume control with mute and delivers 37 mW per channel into a 16-Ω load with less than 1% THD+N at 3.6 V. Housed in a 16-bump micro SMD package, the part also offers a PSRR of 105 dB at 217 Hz. In addition, its high-output impedance mode allows the LM48824’s outputs to be driven by an external source without degrading the signal. ($1.06 ea/1,000 — available now.)
National Semiconductor , Santa Clara , CA
Sales 800-272-9959
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