US 11,671,001 B2
Voltage converter with feedback adjustment and power management device including the same
Dam Yun, Suwon-si (KR); Haneul Kim, Suwon-si (KR); Dongwoo Baek, Suwon-si (KR); Jehyung Yoon, Seoul (KR); and Sangik Cho, Seoul (KR)
Assigned to Samsung Electronios Co., Ltd., Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on Sep. 10, 2020, as Appl. No. 17/16,903.
Claims priority of application No. 10-2020-0011350 (KR), filed on Jan. 30, 2020.
Prior Publication US 2021/0242774 A1, Aug. 5, 2021
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); G01R 19/165 (2006.01); H03K 4/48 (2006.01); G01R 19/175 (2006.01)
CPC H02M 1/0025 (2021.05) [H02M 1/0032 (2021.05); H02M 3/158 (2013.01); G01R 19/16538 (2013.01); G01R 19/175 (2013.01); H02M 1/0009 (2021.05); H03K 4/48 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A voltage converter comprising:
a converting circuit having an inductor connected to a switching node, a first switch element connected between the switching node and a ground voltage, and a second switch element connected between the switching node and an output node; and
a switching control circuit configured to adjust a feedback voltage divided from an output voltage of the output node based on a current state of the inductor, and configured to generate switching control signals for charging the inductor with an input voltage and discharging a voltage charged in the inductor, the switching control signals based on the adjusted feedback voltage and an inverted sensing signal, the inverted sensing signal based on a current of the inductor,
wherein the switching control circuit is configured to adjust the feedback voltage by adding a ripple injection voltage reflecting the current state of the inductor to the feedback voltage, wherein the ripple injection voltage is based on the switching control signals, has a same phase as the current of the inductor, and a direct current (DC) component in the ripple injection voltage is removed.