ABSTRACT To meet the stringent requirements of high‐fidelity (Hi‐Fi) audio systems—particularly ultra‐low output voltage ripple and precise tracking of high‐frequency dynamic envelopes—this paper presents a multiphase interleaved parallel switch‐linear hybrid (SLH) power supply architecture. The system's loss mechanisms are first analyzed in detail, and the dynamic modulation relationship between the output voltage and switching current is rigorously derived using Mason's gain formula. Leveraging this insight, an output‐voltage‐feedforward‐based decoupling control strategy was proposed to effectively suppress the coupling between the current‐source converter (CSC) and voltage‐linear amplifier (VLA) branches. Moreover, to mitigate phase lag at high frequencies, a simple yet effective mode‐switching scheme is introduced. A 3–10.5 V/27 W prototype is fabricated and experimentally evaluated against both a single‐switch SLH converter and a conventional purely interleaved topology. Results demonstrate marked improvements in dynamic response, ripple suppression, and overall efficiency, underscoring the architecture's superiority for high‐performance audio applications.
Qian et al. (Thu,) studied this question.