Designers of mobile products such as smartphones, tablets/multimedia Internet devices (MIDs) and portable media players are faced with the need to make smaller speakers in the product provide louder and clearer audio while minimizing The challenge of battery life impact.
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To meet this challenge, Fairchild Semiconductor, the world's leading provider of high-performance power and portable products, has developed the FAB1200 stereo Class-G ground-referenced headphone amplifier with integrated buck converter. And the FAB2200 audio subsystem with stereo Class-G headphone amplifier and 1.2W Class-D mono speaker amplifier.
The FAB1200 features a charge pump that generates a negative supply voltage, allowing the headphone to be ground-centered and requires no capacitors, eliminating up to two external capacitors. The device uses an integrated inductive buck regulator to directly connect the battery and adjust the supply voltage between two different levels based on the output signal level to reduce power consumption. Features can effectively reduce system cost and extend battery life while maintaining high audio quality levels.
The device is available in a 16-bump, 0.4mm pitch, 1.56mm x 1.56mm WLCSP package for superior audio performance for louder audio headphones for handsets, tablets/MIDs, MP3 players and portable media players .
The FAB2200 is an audio subsystem that combines a capacitorless stereo Class-G headphone amplifier with a Class-D speaker amplifier. This solution uses a proprietary integrated charge pump to generate multiple supply rails to provide a ground-centered Class-G headphone output. Compared to the Class-AB design implementation, the new product can significantly reduce power consumption while providing a high Power Supply rejection ratio.
The Filterless Class-D amplifier can be connected directly to a single speaker, eliminating the need for two external filter networks, reducing overall system cost. The device also features Automatic Gain Control (AGC), which limits the speaker's maximum output level to protect the speaker from distortion. It also limits the amplitude dynamically when the battery voltage drops.
The FAB1200 and FAB2200 portable audio ICs make the sound quality of mobile phones, tablets/MIDs and other portable audio applications louder and clearer while reducing overall system cost and minimizing the impact on battery runtime.
Available in 25-bump, 0.4mm pitch, WLCSP packages, the FAB2200 is ideal for mobile phones, laptops and tablets.
Fairchild is a leader in portable technology, offering a wide range of customizable analog and power IP products to meet specific design needs. By integrating advanced circuit technology into a miniature advanced package, Fairchild offers significant advantages to portable product users while reducing design size, cost and power. Fairchild's portable IP industry has been used in most mobile phones today.
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