公开(公告)号：US09923453B1

公开(公告)日：2018-03-20

申请号：US15603815

申请日：2017-05-24

Applicant: Korea Advanced Institute of Science and Technology

Inventor： Sang-Gug Lee ,  Baek-Min Lim ,  Jeong-Il Seo ,  Young-Seok Noh ,  Hyun-Mo Gu

IPC: H02M3/158 ,  H02M1/36 ,  H01L35/02

CPC classification number: H02M1/36 ,  H01L35/02 ,  H02J7/0052 ,  H02M3/158

Abstract: A power management device according to example embodiments includes a self-startup circuit including an oscillator and a voltage multiplier to generate a start-up voltage in a first start-up period based on an input voltage, a boost converter to alternately charge the start-up voltage and an output voltage within a start-up voltage range during a second start-up period and to charge only the output voltage during an operation period, a controller to control the self-startup circuit and the boost converter based on a magnitude of the start-up voltage, a voltage charger including a start-up voltage capacitor and an output voltage capacitor, and a shared inductor connected between the input node and a common input node. The shared inductor operates as a part of the oscillator during the first start-up period and a part of the boost converter during the second start-up and operation periods.