The difference between a power adapter and a charger


A charger usually refers to a device that converts alternating current into low-voltage direct current. It includes current-limiting and voltage-limiting control circuits that meet charging characteristics. The power adapter is a power converter that undergoes voltage transformation, rectification, and voltage regulation. The output is DC, which can be understood as a low-voltage stabilized power supply when the power is met. Let's talk about what is the power adapter? What is the charger? What is the relationship and difference between them?

Charger: English name Charger, usually refers to a device that converts AC power to low-voltage DC power. The charger is a dedicated DC power supply for rechargeable batteries. It includes current limit, voltage limit, etc. to meet the control of charging characteristics Circuit.

Chargers are widely used in various fields, especially in the field of life are widely used in electric vehicles, flashlights, and other common electrical appliances. It generally charges the battery directly without any intermediary equipment and devices.

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 battery life. Three-stage charging uses constant current charging, then constant voltage charging, and finally float charging for maintenance charging.

Chargers are 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 power. 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.

Complimentary 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 charging rate generally does not exceed 0.3C, because the battery voltage increases after the rapid charging phase, so the charging voltage in the supplementary charging phase is also It should be improved and kept 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 value or the charging current decreases to a certain value, the charging is started with a smaller current until the charging is completed after a certain condition is satisfied.

Power adapter: the common power adapter on the market is a power converter that has been 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.

Power adapters are widely used in routers, telephone 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 to the host with a line. This 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 the power transformer and rectifier circuit, according to its output type can be divided into AC output type and DC output type; according to the connection, the method can be divided into wall type and desktop type. There is a nameplate on the power adapter, which is marked with power, input and output voltage, and current and other indicators, especially pay attention to the input voltage range.