US 11,757,362 B2
Power supply circuit and power supply control method
Peng Zou, Shenzhen (CN); Boning Huang, Dongguan (CN); and Jianquan Wu, Dongguan (CN)
Assigned to Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed by Huawei Technologies Co., Ltd., Shenzhen (CN)
Filed on Oct. 22, 2021, as Appl. No. 17/451,986.
Application 17/451,986 is a continuation of application No. PCT/CN2019/084403, filed on Apr. 25, 2019.
Prior Publication US 2022/0045611 A1, Feb. 10, 2022
Int. Cl. H02M 3/158 (2006.01)
CPC H02M 3/1582 (2013.01) [H02M 3/1584 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A power supply circuit comprising:
one or a plurality of first-stage voltage conversion circuits, an input end of the first-stage voltage conversion circuit being coupled to a power supply node, the first-stage voltage conversion circuit being configured to
convert a first voltage received at the input end into a second voltage, and
output the second voltage from an output end of the first-stage voltage conversion circuit, the second voltage being less than the first voltage, and the second voltage being greater than or equal to 0.6 V and less than or equal to 1.3 V; and
one or a plurality of second-stage voltage conversion circuits, an input end of the second-stage voltage conversion circuit being coupled to the output end of the first-stage voltage conversion circuit, the second-stage voltage conversion circuit being configured to
convert the second voltage into a third voltage, and
supply the third voltage to a load, wherein the third voltage is less than the second voltage, and a switching frequency of the second-stage voltage conversion circuit is greater than or equal to 30 MHz.