Fairchild Semiconductor today announced the availability of its long vaunted mobile speaker amplifier, the FAB1200 stereo as well as the FAB2200 audio subsystem with stereo Class-G headphone amplifier and 1.2W Class-D mono speaker amplifier.
The little device features a charge pump which generates a negative supply voltage allowing the headphone output to be ground-centered and capacitor-free, saving space by eliminating up to two external capacitors.
Meanwhile, an integrated inductive buck regulator provides direct battery connection and adjusts the supply voltage between two different levels based on the output signal level to save on battery life in mobile phones and tablets, as well as MP3 players.
With its Automatic Gain Control limiting maximum speaker output, the device protects the speaker against distortion and can also dynamically limit clipping as the battery voltage falls.
Fairchild says the filterless Class-D amplifier can likewise be connected directly to a speaker without the need for two external filter networks, reducing the overall systems cost.
