US 11,811,315 B2
DC/DC conversion circuit
Yongbing Gao, Shanghai (CN); Jun Wang, Shanghai (CN); and Lei Shi, Shanghai (CN)
Assigned to HUAWEI DIGITIAL POWER TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by Huawei Digital Power Technologies, Co., Ltd., Shenzhen (CN)
Filed on Jun. 17, 2021, as Appl. No. 17/350,191.
Application 17/350,191 is a continuation of application No. PCT/CN2019/121009, filed on Nov. 26, 2019.
Claims priority of application No. 201811546964.0 (CN), filed on Dec. 18, 2018.
Prior Publication US 2021/0313880 A1, Oct. 7, 2021
Int. Cl. H02M 3/155 (2006.01); H02H 7/12 (2006.01); H02M 1/44 (2007.01); H02M 7/537 (2006.01); H04B 1/40 (2015.01)
CPC H02M 3/155 (2013.01) [H02H 7/1213 (2013.01); H02M 1/44 (2013.01); H02M 7/537 (2013.01); H04B 1/40 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A direct current (DC)/DC conversion circuit comprising:
an input end configured to couple to an external power supply to receive power at the DC/DC conversion circuit;
a power circuit;
a first output end;
a switch disposed between the input end and the power circuit; and
a bypass circuit coupled between the input end and the power circuit and disposed between the switch and the power circuit, wherein the bypass circuit is a unidirectional conduction circuit and is coupled to the power circuit in parallel,
wherein the switch is configured to be closed when the input end is reversely coupled to the external power supply, and
wherein when the switch is closed and when the input end is reversely coupled to the external power supply, the DC/DC conversion circuit is configured to:
receive a first current from a positive electrode of the external power supply; and
output the first current to a negative electrode of the external power supply through the bypass circuit and the switch.