Circuit board of power adapter, power adapter and electric equipment

Abstract

The invention relates to a circuit board of a power adapter, the power adapter and electric equipment, and belongs to the technical field of circuit boards. The circuit board comprises a transformer, a direct current bus, a filtering module, a chip and a radiator configured on the chip, the direct current bus is used for receiving direct current output by the transformer, and the filtering module is used for filtering the direct current received by the direct current bus; the chip is formed between the transformer and the filtering module, so that the radiator on the chip is positioned between the transformer and the filtering module; and the radiator is connected with the direct current bus. According to the invention, the requirement for reducing EMI under the miniaturization design of the power adapter can be met.

Description

technical field [0001] The application belongs to the technical field of circuit boards, and in particular relates to a circuit board of a power adapter, a power adapter and electrical equipment. Background technique [0002] In the related art, a power adapter is used with electrical equipment, and many electrical equipment need to be charged through the power adapter, especially small electrical equipment, such as mobile phones, notebooks, and the like. [0003] In specific product applications, the requirements for the size, frequency, and power density of the power adapter are getting higher and higher. Commonly, the power adapter is required to be small and portable. The more compact the layout space, the higher frequency and higher power density have a great impact on the electromagnetic compatibility characteristics of the power adapter, which makes the EMI (electromagnetic interference) problem of the power adapter more prominent. Specifically, it is reflected in the...

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Problems solved by technology

[0003] In specific product applications, the requirements for the size, frequency, and power density of the power adapter are getting higher and higher. Commonly, the power adapter is required to be small and portable. The more compact the layout space, the higher frequency and higher power density have a great impact on the electromagnetic compatibility characteristics of the power adapter, which makes the EMI (electromagnetic interference) problem of the power adapter more prominent. Specifically, it is reflected in the increased frequency. The high-frequency spectrum of electromagnetic noise deteriorates the electromagnetic noise source in the power adapter, and the increase in power density reduces the spacing between various electronic devices and increases the distribution parameters of electromagnetic coupling.

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