54 views Yuda Electronic (HK) Technology Co.,Limited. 2020-04-29
Can the power adapter be used as a charger?
The answer is: no.
A charger usually refers to a device that converts AC power to low-voltage DC power. It includes a control circuit that satisfies charging characteristics such as current limiting and voltage limiting. The power adapter is a power converter that is transformed, rectified and stabilized, and the output is DC, which can be understood as a low-voltage stabilized power supply when the power is met.
Dual USB charger
The flow of the charger is: constant current-constant voltage-trickle, three-stage intelligent charging. The three-stage charging theory in the charging process can greatly improve the charging efficiency of the battery, shorten the charging time, and effectively extend the life of the battery. Three-stage charging uses constant current charging, then constant voltage charging, and finally float charging for maintenance charging.
It is generally divided into three stages: fast charging, top-up charging and trickle charging.
Fast charging stage: The battery is charged with a large current to quickly restore the battery function. The charging rate can reach more than 1C. At this time, the charging voltage is low, but the charging current will be limited to a certain value range.
Supplementary charging stage: Compared to the fast charging stage, the complementary charging stage can also be called the slow charging stage. When the fast charging phase is terminated, the battery is not completely sufficient, and a supplementary charging process needs to be added. The supplementary rate generally does not exceed 0.3C. Because the battery voltage increases after the fast phase, the charging voltage in the supplementary charging phase should also Increased, and constant within a certain range.
Trickle charging stage: In the late stage of the complementary charging stage, when it is detected that the temperature rise exceeds the limit or the charging current decreases to a certain value, the charging is started with a smaller current until the charging is completed after certain conditions are met.
Power adapter: The common power adapter on the market is a power converter that has been transformed, rectified and stabilized. The output is DC, which can be understood as a low-voltage regulated power supply when the power is met.
The power adapter is widely used in routers, phone handsets, game consoles, language repeaters, walkmans, notebooks, mobile phones and other devices. Most power adapters can automatically detect 100 ~ 240V AC (50 / 60Hz)
The power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It externally connects the power supply and connects it to the host with a line, which can reduce the size and weight of the host. Only a few devices and appliances have the power supply built into the host Inside.
It is internally composed of power transformer and rectifier circuit, and can be divided into wall-plug type and desktop type according to its output type. There is a label on the power adapter, which identifies the model of the power adapter, the input voltage and current, and the output voltage and current.
A qualified power adapter requires safety certification. A power adapter with safety certification can protect personal safety and prevent electric shock, fire and other hazards.
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