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Article: National Semiconductor's New Stereo Headphone Amplifier Doubles Audio Playback Time for Portable Devices.
- Article from:
- Electronics Newsweekly
- Article date:
- April 22, 2009
CopyrightCOPYRIGHT 2009 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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A new PowerWise(R) stereo headphone amplifier from National Semiconductor Corp. (NYSE:NSM) draws only 0.9 mA (typical) of quiescent current to double the audio playback time of smart phones, full-featured mobile phones and portable music players.
The LM48824's Class G architecture significantly increases audio (MP3, mobile TV, etc.) playback time with its adaptive power supply approach that enables very low supply rails, which doubles the power-efficiency compared to typical Class AB headphone amplifiers. Additionally, the LM48824's output noise created by ground mismatches is improved through common-mode sensing that corrects for differences between the ...