STMicro Increases Power Output of Portable Stereo Amplifiers Featuring 3D Audio Capabilities

Wide separation is acknowledged by audiophiles to deliver a better listening experience; home-audio equipment can easily achieve this separation by ensuring a large distance between speakers. To overcome the physical restrictions of portable form factors, the TS4999’s 3-dimensional audio creates the effect of wide channel separation. In addition, selectable 3D modes allow the audio image to be focused behind, above or below the listener, which can also improve performance and comfort for headphone users.

Using class-D operation to achieve up to 90% efficiency, the TS4999 benefits from reduced heat dissipation, which allows smaller portable products with high power density. Combined with the low minimum supply voltage of 2.4V the TS4999’s high efficiency also allows battery-powered products to operate for longer before recharging. A 10nA power-saving mode also minimizes battery drain when the audio features are not being used.

The TS4999 meets high standards for output power and distortion, by delivering up to 2.8 Watts per channel into 4-Ohm speaker loads and achieving distortion of 1%. Its high power-supply rejection ratio also prevents power-supply noise from entering the audio signal.