US 12,170,483 B2
High efficiency power supply system having multiple ports
Sin-Sian Jheng, Hsinchu (TW); and Jiun-Jang Lin, Hsinchu (TW)
Assigned to Richtek Technology Corporation, Hsinchu (TW)
Filed by Richtek Technology Corporation, Hsinchu (TW)
Filed on May 22, 2023, as Appl. No. 18/321,755.
Claims priority of application No. 111124917 (TW), filed on Jul. 4, 2022.
Prior Publication US 2024/0006995 A1, Jan. 4, 2024
Int. Cl. H02M 7/5387 (2007.01); H02M 1/00 (2006.01); H02M 3/158 (2006.01)
CPC H02M 3/158 (2013.01) [H02M 1/0067 (2021.05)] 16 Claims
OG exemplary drawing
 
1. A power supply system, configured to provide a power conversion function for a system circuit, comprising:
a first converter circuit, comprising a plurality of first switches and a first inductor, the first converter circuit being coupled to a first power through a first port of the system circuit, wherein the plurality of first switches of the first converter circuit are configured to operate the first inductor to perform power conversion between the first power and an internal bus power of the system circuit;
a second converter circuit, comprising a plurality of second switches and a second inductor, the second converter circuit being coupled to a second power through a second port of the system circuit, wherein the plurality of second switches of the second converter circuit are configured to operate the second inductor to perform power conversion between the second power and the internal bus power of the system circuit; and
a third converter circuit, comprising a plurality of third switches and a third inductor, wherein the plurality of third switches of the third converter circuit are configured to operate the third inductor to perform power conversion between the internal bus power of the system circuit and a third power, wherein the third power is coupled to a battery module and an internal load circuit;
wherein an internal bus voltage of the internal bus power is configurable, and the system circuit is optionally operable in a high dropout mode;
wherein in the high dropout mode, the internal bus voltage is configured to be greater than a first voltage of the first power, a second voltage of the second power, and a third voltage of the third power, such that an internal bus current of the internal bus power is smaller than a third current of the third power;
wherein the first converter circuit is electrically connected to the third converter circuit by a first wire having a first preset length, and the third converter circuit is electrically connected to the internal load circuit or the battery module by a second wire having a second preset length, wherein the first preset length is greater than the second preset length.