US 12,259,837 B2
USB power supply circuit with idle power distribution and the method thereof
Peijian Ding, Chengdu (CN); Junyong Gong, Chengdu (CN); Huan Liu, Chengdu (CN); and Shuai Yuan, Chengdu (CN)
Assigned to Chengdu Monolithic Power Systems Co., Ltd., Sichuan (CN)
Filed by Chengdu Monolithic Power Systems Co., Ltd., Chengdu (CN)
Filed on Apr. 7, 2023, as Appl. No. 18/297,430.
Claims priority of application No. 202210447974.9 (CN), filed on Apr. 26, 2022.
Prior Publication US 2023/0342317 A1, Oct. 26, 2023
Int. Cl. G06F 13/14 (2006.01); G06F 13/38 (2006.01)
CPC G06F 13/382 (2013.01) [G06F 2213/0042 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A USB controller, comprising:
a first port, coupled to a first power converter, to control the first power converter to supply a first output power to a first device attached to the first port; and
a second port, coupled to a second power converter, to control the second power converter to supply a second output power to a second device attached to the second port; the first power converter and the second power converter respectively having a first maximum output power and a second maximum output power, wherein:
the controller is configured to monitor the first output power and the second output power, if the first output power is lower than the first maximum output power, the controller controls an idle power margin to the second power converter; and if the second output power is lower than the second maximum output power, the controller controls the idle power margin to the first power converter.