US 12,438,466 B2
Integrated circuit control device for multi-phase switching converters and control method thereof
Huichun Dai, Hangzhou (CN); Wangmiao Hu, Hangzhou (CN); Fangyu Zhang, Hangzhou (CN); Keke Zhao, Hangzhou (CN); Lijie Jiang, Hangzhou (CN); and Jinghai Zhou, Kirkland, WA (US)
Assigned to Chengdu Monolithic Power Systems Co., Ltd., Sichuan (CN)
Filed by Chengdu Monolithic Power Systems Co., Ltd., Chengdu (CN)
Filed on Apr. 10, 2023, as Appl. No. 18/298,187.
Claims priority of application No. 202210393099.0 (CN), filed on Apr. 14, 2022.
Prior Publication US 2023/0336082 A1, Oct. 19, 2023
Int. Cl. H02M 3/158 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01)
CPC H02M 3/1586 (2021.05) [H02M 1/0009 (2021.05); H02M 1/32 (2013.01); H02M 1/327 (2021.05)] 20 Claims
OG exemplary drawing
 
17. A control method used in a multi-phase switching converter having a plurality of switching phases including a master phase and at least one slave phase, the control method comprising:
providing a first ON-time control signal to control an ON-time of a first switch in the master phase of the multi-phase switching converter;
providing a respective slave ON-time control signal to control an ON-time of a slave switch in each slave phase of the at least one slave phase of the multi-phase switching converter, wherein in each slave phase:
receiving a first temperature signal representative of a master phase temperature of the master phase of the multi-phase switching converter and a slave temperature signal representative of a temperature of a corresponding slave phase of the at least one slave phase of the multi-phase switching converter, and providing a gain by executing proportional integral operation to a difference between the first temperature signal and the slave temperature signal;
multiplying a slave current signal representative of a current flowing through the slave switch with the gain, and provide a current feedback signal;
providing a bias by executing proportional integral operation to a difference between a first current signal representative of a current flowing through the first switch and the current feedback signal;
generating a bias ON-time control signal based on the bias; and
providing the respective slave ON-time control signal for the slave switch in the corresponding slave phase by adding the first ON-time control signal to the bias ON-time control signal.