Patent ID: 11888342
Assignee: MONOLITHIC POWER SYSTEMS, INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 10:
11. A method for controlling an electric system, wherein the electric system has an input terminal to receive an input voltage, a system output terminal to provide a system voltage, an input switch coupled between the input terminal and a first terminal, and a switching circuit coupled between the first terminal and the system output terminal, the switching circuit works in a buck mode to convert a boost output voltage at the first terminal to the system voltage or works in a boost mode to convert the system voltage to the boost output voltage at the first terminal, the electric system further has N charging units for charging N loads respectively, wherein N is an integer greater than 1, and for each i from 1 to N, wherein i is an integer in a range from 1 to N, the ith charging unit has an input terminal coupled to the first terminal, and an output terminal coupled to ith load of the N loads, the method comprising the steps of:
setting the boost output voltage to be an initial voltage;
sensing N charging currents passing through the N charging units respectively; and
adjusting the boost output voltage based on the N charging currents, wherein when the N charging currents are higher than a fast charge threshold current, the boost output voltage is controlled to decrease from the initial voltage.