A Single-Stage Four-Phase Dual-Output Regulating Rectifier With Ultrafast Transient Response Using Double-Frequency Current-Wave Modulation

This paper presents a 6.78MHz reconfigurable four-phase dual-output series resonant rectifier that integrates hysteresis control and the triple-mode double-frequency current wave modulation (DFCWM) technique. The rectifier accomplishes AC-DC rectification and dual-output voltage regulation within a single power stage, achieving high efficiency and a reduced number of off-chip components. The combination of hysteresis control with the triple-mode DFCWM enables rectification and voltage regulation without crossover adjustments through four independent phases. Without altering the external LC resonant frequency, more uniform power conversion and reduced output voltage ripple are achieved, while also enhancing the transient response speed of the load. When simulating with a 0.18-μm CMOS process, the dual-output voltages can be adjusted to 1.1V and 2.2V, reaching a maximum output power of 0.7W with a peak power conversion efficiency (PCE) of 89.2%. Furthermore, a rapid transient load response can be observed when the load current varies between 20mA and 200mA.