Power supply system and portable electronic device

Abstract

The invention relates to a power supply system and a portable electronic device. The power supply system comprises a transformer, a battery, a selection module, a first-stage direct current conversion module, a plurality of second-stage direct current conversion modules and a switching module, wherein the transformer is used for converting an external alternating current power supply to an external direct current power supply; the battery is used for providing a power supply of the battery; the selection module is used for outputting the external direct current power supply or the power supply of the battery; the first-stage direct current conversion module is used for converting the power supply outputted by the selection module to a first direct current power supply; each second-stage direct current conversion module is used for converting the input power supply to a second direct current power supply; and the switching module is used for selecting the first direct current power supply outputting the power supply of the battery or the first-stage direct current conversion module as the input power supply of each second-stage direct current conversion module according to the external direct current power supply.

Description

technical field [0001] The present invention relates to a power supply system and a portable electronic device, in particular to a power supply system that can greatly improve power conversion efficiency by only adding a small number of parts to the existing design structure, and a device using the power supply system Portable Electronic Devices. Background technique [0002] With the development of science and technology and the progress of industry, portable electronic devices, such as notebook computers, mobile phones, cameras, MP3 players, etc., are greatly increased in daily life. Generally speaking, in addition to emphasizing the lightness and compactness in size, today's portable electronic devices also pursue the increase of system performance and portable use time. However, when the system performance increases, the power consumption of the system will also increase synchronously, which is not conducive to the battery life. Therefore, in product design, system perf...

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Problems solved by technology

However, when the system performance increases, the power consumption of the system will also increase synchronously, which is not conducive to the battery life. Therefore, in product design, system performance and battery life often cannot be achieved at the same time.

[0003] Traditionally, there are only two ways to increase battery life: one is to increase battery capacity, but this will increase product cost; the other is to replace high-efficiency components to reduce energy loss during power conversion, but this will also increase the design cost. cost

It can be seen from this that increasing the battery life will definitely increase the manufacturing cost significantly, thereby increasing the unit price of the product and losing the competitiveness of the product

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