US 12,316,208 B2
Three-level direct current converter, power supply system, and chip
Guolei Yu, Dongguan (CN); Shuchao Song, Hangzhou (CN); Junliang Qin, Dongguan (CN); and Zhiqiang Xiang, Dongguan (CN)
Assigned to HUAWEI TECHNOLOGIES CO., LTD., Shenzhen (CN)
Filed by HUAWEI TECHNOLOGIES CO., LTD., Guangdong (CN)
Filed on Jul. 28, 2022, as Appl. No. 17/876,419.
Claims priority of application No. 202110872542.8 (CN), filed on Jul. 30, 2021.
Prior Publication US 2023/0029565 A1, Feb. 2, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 1/14 (2006.01); H02M 3/07 (2006.01)
CPC H02M 1/0095 (2021.05) [H02M 1/08 (2013.01); H02M 1/14 (2013.01); H02M 3/07 (2013.01); H02M 3/158 (2013.01); H02M 1/007 (2021.05)] 19 Claims
OG exemplary drawing
 
1. A three-level direct current converter, comprising:
a flying capacitor;
a plurality of switch groups;
a drive circuit; and
a control circuit, wherein the control circuit comprises at least an on-time generator, wherein, the on-time generator is configured to adjust an output on-time signal by changing a charging current of a capacitor of the on-time generator when a voltage on the flying capacitor deviates from a half of a power supply voltage, wherein the on-time signal is output to the drive circuit; and
the drive circuit is configured to generate a drive pulse signal based on the on-time signal to drive switch statuses of the plurality of switch groups, to adjust charging time and discharging time of the flying capacitor, so that an absolute value of a difference between the voltage on the flying capacitor and the half of the power supply voltage is less than or equal to a preset threshold.