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This paper proposes a modulated hysteretic current control (MHCC) technique to improve the transient response of a DC-DC boost converter, which suffers from low bandwidth due to the existence of the right-half-plane (RHP) zero. The MHCC technique can automatically adjust the on-time value to rapidly increase the inductor current, as well as to shorten the transient response time. In addition, based...
A fast mode-switching technique between pulse width modulation (PWM) and pulse frequency modulation (PFM) modes is proposed to keep high efficiency over wide load range. Load dependent zero-current detector (ZCD) can effectively speed up the transition from PWM to PFM mode. Especially, the overshoot voltage can be minimized by using the reversed current provided by the ZCD circuit. Furthermore, the...
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