The working principle of the power adapter | phone cable adaptor

The working principle of the power adapter | phone cable adaptor

The working principle of the power adapter | phone cable adaptor

In reality, most of the power adapters we come into contact with are switching power supplies. Switching power supply refers to a kind of power supply that maintains a stable output voltage by controlling the time ratio of switching on and off through modern electronic technology. The switching power supply of power adapter is generally composed of pulse width modulation (PWM) control IC and MOSFET. Benefits: The conversion efficiency is high, the volume is small, and it can work in a wide voltage range. Insufficiency: It is more difficult to repair when a fault occurs, and it will cause greater interference to the power circuit.

The power adapter (lyd6688.com), whose English name is Power adapter, is a power supply conversion device for small portable electronic devices and electronic appliances. It is generally composed of a casing, 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 method can be divided into wall type and desktop type. It is widely used in the equipment such as telephone handsets, game consoles, language repeaters, walkmans, notebook computers, and cellular phones.

The power adapter, whose English name is Power adapter, is a power supply conversion device mainly used for small electronic devices and electronic appliances. It is generally composed of a housing, a power transformer and a rectifier circuit.
The 220V alternating current is transformed into a low voltage alternating current through a step-down transformer. 2. Using 4 diodes, use the unidirectional conductivity of the diodes to convert alternating current into direct current (the size is variable). 3. Use capacitor filtering to transform the variable DC power into a constant DC power.

There are two types of power adapters:

1. A simple transformer, some have a certain voltage stabilizing function, and the output is AC. There is a rectifier circuit inside this type of electrical appliance.

2. Transformation voltage stabilization and rectification, the output is DC. Such appliances have no rectifier circuit. The adapter in 1 is absolutely unavailable. As for the principle, there are two types of transformers and switching power supplies. Of course, there are also ultra-cheap capacitor voltage dividers.

According to the connection method classification: it can be divided into desktop type and plug-in type; according to the output current type classification: it can be divided into AC output type and DC output type. Widely used in notebook computers, mobile phones, home IT equipment and other equipment
phone cable adaptor

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