Power supply system, control method thereof and electronic equipment

Abstract

The invention provides a power supply system and a control method thereof, and electronic equipment, and the system comprises a switching power supply which comprises a power output end and has a plurality of switching frequencies; the plurality of capacitors are in one-to-one correspondence with the plurality of switching frequencies, and each capacitor in the plurality of capacitors is used for filtering noise of the switching frequency corresponding to each capacitor in the plurality of switching frequencies; and the switch module is positioned between the plurality of capacitors and the power supply output end, and is used for responding to the current working frequency of the switching power supply, controlling a first capacitor corresponding to the current switching frequency in the plurality of capacitors to be in a working state, and controlling other capacitors except the first capacitor in the plurality of capacitors to be in a non-working state. According to the current switching frequency, the corresponding capacitor is selected to be connected to the power supply output end to filter the switching noise corresponding to the current switching frequency, so that the problem that the performance of a power supply system is reduced and even the power supply system is damaged due to overlarge surge current caused by simultaneous parallel connection of a plurality of capacitors at the output end is avoided.

Description

technical field [0001] The present application relates to the field of power supply technology, and in particular to a power supply system, a control method thereof, and electronic equipment. Background technique [0002] Switching power supply has the characteristics of small size, light weight and high efficiency, so the power supply system with switching power supply as the core is widely used in various fields. As the switching frequency changes, the frequency of the power system switching noise also changes. In the related art, a method of connecting multiple capacitors in parallel is used to filter out switching noises of various frequencies. [0003] However, the more capacitors connected in parallel at the output, the larger the equivalent capacitance. Therefore, at the moment when the power system is started, the surge current value is larger. Excessive surge current will affect the performance of the power system and even damage the internal components of the po...

AI Technical Summary

Problems solved by technology

Excessive surge current will affect the performance of the power system, and even damage the internal components of the power system

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