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

Claim 8:
9. The electric system of claim 8, wherein the voltage control module comprises:
a minimum current selection circuit, having N input terminals to respectively receive the N charging currents, and an output terminal to provide the minimum one of the N charging currents;
a voltage control amplifier, having a first input terminal to receive a reference voltage, a second input terminal to receive a feedback voltage indicative of the boost output voltage, and an output terminal to provide a first error signal based on the reference voltage and the feedback voltage;
a current control amplifier, having a first input terminal to receive the minimum one of the N charging currents, a second input terminal to receive a fast charge reference current, and an output terminal to provide a second error signal based on the fast charge reference current and the minimum one of the N charging currents; and
a switching control circuit, configured to receive the first error signal and the second error signal, and to generate a switching control signal to control the switching circuit based on the first error signal or the second error signal;
wherein when the minimum one of the N charging currents is lower than the fast charge threshold current, the switching circuit is controlled by the first error signal to regulate the boost output voltage to be the initial voltage, and when the minimum one of the N charging currents is higher than or equal to the fast charge threshold current, the switching circuit is controlled by the second error signal to provide a boost current determined by the fast charge reference current to the N charging units.