STMicroelectronics Introduces TS4621, a Stereo Headphone Amplifier IC

The TS4621 is a stereo headphone amplifier IC that achieves significantly higher efficiency than previous-generation devices, enabling listeners to enjoy high-quality sound for longer between battery charges. The TS4621 delivers the high audio performance of a traditional analog amplifier, and saves power by operating from a lower supply voltage for the majority of audio-signal levels. The TS4621 simplifies system design with features including an industry-standard I2C interface enabling digital volume control from -60dB to +4dB, and integrated switch-on/switch-off circuitry that eliminates pop and click noise. Its ultra-small 1.65mm x 1.65mm chip-scale package allows the amplifier to be positioned very close to the headphone connector for optimum audio performance. The TS4621 has four-times lower quiescent current consumption than the existing TS4601; a class AB amplifier. This saving is valuable in energy-sensitive applications such as battery-powered devices. At the same time, the TS4621 excels in key audio performance parameters to deliver an outstanding listening experience for end users…

TS4621 – a Stereo Headphone Amplifier IC
(Photo: ST)