Power adapter is a power supply conversion device for small portable electronic devices and electronic appliances. It is widely used in mobile phone handsets, game consoles, language repeaters, walkmans, notebook computers, cellular phones and other equipment. The power adapter is generally composed of a shell, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; according to the connection mode, it can be divided into wall type and desktop type. Power adapters are widely used in industrial automation control, military equipment, scientific research equipment, LED lighting, industrial control equipment, communication equipment, power equipment, instrumentation and other fields.

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