Balancing audio power and battery life
Fairchild Semiconductor's Class G headphone and Class D speaker amplifier audio

Extended battery life and larger, more advanced audio solutions

Designers of mobile devices such as smartphones, tablets, and portable media players face the challenge of creating smaller speakers for larger, more powerful products while minimizing battery life.

To overcome these challenges, Fairchild Semiconductor, a leading global supplier of high-performance power and mobile products, has developed the FAB2200 audio subsystem, a stereo Class-G headphone amplifier and a 1.2W Class-D mono speaker amplifier, as well as the FAB1200, a Class-G ground-referenced headphone amplifier with an integrated buck converter.

The FAB1200 features a charge pump that generates negative power, eliminating the need for two external capacitors, and supports ground-centered, capacitor-free headphone output. The built-in buck rectifier is connected directly to the battery and reduces power consumption by regulating the supply voltage between two different levels depending on the output signal level. These features result in increased system cost and battery life while maintaining a high level of audio quality.

Available in a 16-pin, 0.4mm pitch, 1.56mm X 1.56mm WLCSP package, the device delivers superior audio performance for better sound quality audio headsets and is ideal for mobile devices, tablets, MP3s and portable media players.

The FAB2200 is an audio subsystem combining a Class-D speaker amplifier and a capacitor-less stereo Class-G headphone amplifier. A proprietary integrated charge pump generates multiple supply rails for ground-centered Class-G headphones, significantly reducing power dissipation compared to Class-AB designs, while also providing high power-supply rejection ratio.

The filter-less Class-D amplifier reduces overall system cost and can be connected directly to the speaker without the need for two external filter networks. It also features automatic gain control, which limits the maximum speaker output level to protect the speaker without distortion. Clipping can be dynamically limited as the battery voltage drops.

The FAB1200 and FAB2200 mobile audio ICs deliver louder, improved sound to handsets, tablets, and other portable audio applications, while reducing overall system cost and minimizing battery life. Available in a 25-pin, 0.4mm pitch, WLCSP package, the FAB2200 is ideal for handsets, laptops, and tablets.

Fairchild is a leading mobile technology provider, offering a comprehensive portfolio of analog and power IP, customizable to meet specific design requirements. By leveraging leading technologies that enable integration into smaller, more advanced packages, Fairchild enables designs that reduce size, cost, and power, while delivering significant user benefits. Fairchild's mobile IP can be found in leading handsets used today.

Fairchild Semiconductor: The Right Technology For Your Success™

Price: Per unit, based on quantity of 1,000 pieces

FAB1200 $0.36
FAB2200 $0.57

Availability: Samples are currently shipping

Delivery time: 8-10 weeks