Southchip launches audio power amplifier, defining an immersive acoustic experience
2026-02-28
Southchip unveiled its new audio power amplifier series, including the 10.5V SC28561 and the 9.5V SC28376. These products are designed to flexibly meet the audio voltage requirements of smartphones across different quality and price segments. The series features ultra-low standby power consumption and high power conversion efficiency, significantly extending the audio playback time of smartphones. Specifically, SC28561 achieves a standby power consumption as low as 9.1mW, a 43.7% reduction compared to similar products. At the common 1W power level, its power conversion efficiency reaches up to 90.5%, and its UVLO threshold is as low as 1.7V, aligning with the development trend of silicon anode batteries. This delivers a powerful, pure, and long-lasting audio experience for users, marking Southchip's strategic expansion into the acoustic market.
Multi-Dimensional Optimization: Say Goodbye to Battery Anxiety
Audio is a crucial interface between users and consumer electronics. As smartphone audio quality improves and user engagement time increases, the system demands more from power management to ensure both excellent sound quality and long battery life. As the core component of an audio system, the audio power amplifier is responsible for driving the speaker and amplifying the signal. Market reports indicate the global audio power amplifier market is valued at tens of billions of dollars and is projected to continue growing at a CAGR of over 4% in the next decade.
Leveraging its deep expertise in power management, Southchip is actively expanding into the audio power amplifier market. By optimizing standby power consumption, system efficiency, and under-voltage lockout (UVLO), Southchip enables efficient utilization of battery power, comprehensively extending device usage time.
Typical application circuits for Southchip audio power amplifiers: (a) SC28561; (b) SC28376
Regarding standby power consumption, taking SC28561 as an example, it achieves a low of 9.1mW, a 43.7% reduction compared to competing products. In terms of system efficiency, Southchip's audio amplifiers incorporate a new adaptive envelope tracking technology and advanced multi-rail power tracking design, delivering industry-leading energy efficiency across the full power range. At 4.4V with a 1W output, SC28561 achieves an efficiency of up to 90.5%. Its efficiency remains industry-leading at various power levels, including low-signal 50mW, common-use 0.1W & 1W, and medium-to-high 3W.
Concerning UVLO, to align with the adoption of silicon anode batteries in mobile devices, Southchip's audio amplifiers feature an ultra-low UVLO threshold of 1.7V. This allows the system to effectively track the discharge curve of silicon anode batteries, converting more chemical capacity into usable electrical energy and fully unleashing the potential of their high energy density.
Additional Performance Advantages
Alongside enhanced efficiency, Southchip's audio power amplifiers also excel in improving sound quality and system reliability.
SC28561 delivers an output power of 5.6W, with an ultra-low noise level of 7.2μV. At 1W output, its Total Harmonic Distortion plus Noise (THD+N) is below 0.008%, and it boasts a high dynamic range of 117dB, ensuring pure and authentic audio signal reproduction.
SC28561 supports IV-Sense technology for real-time loudspeaker protection, enhancing overall system safety and reliability.
SC28376 supports output power exceeding 4.5W. Combined with its ultra-compact package, low quiescent current, and high power efficiency, it offers customers exceptional cost-performance value.
