Switching power supply is a way to convert 220 V AC power supply to low voltage DC power supply. Different from the traditional power frequency transformer, the power supply with this switching voltage technology is generally called switching power supply. Bare board power supply is a small switching power supply, which is mainly divided into AC / DC bare board power supply and AC / DC bare board power supply. Because of its small size, peripheral devices are often added, which are mainly used for voltage conversion of power supply to the system, and have no charging function.
Power adapter refers to the power supply of computer host power supply, printer power supply, display power supply and other equipment, not called charger. Power adapter has the characteristics of small size, energy saving and environmental protection, multiple safety protection, long service life and wide application range. It can be divided into desktop power adapter, direct plug-in power adapter, multi-channel power adapter, USB power adapter, etc. The power adapter includes the charger, but the charger does not include the power adapter.
A charger is a power supply that only charges the battery. It adds charging detection and control circuits to switching power supply, such as constant current, reverse connection, floating charging, automatic charging voltage regulation, etc. The common ones are USB charger, mobile phone charger, notebook power supply, car charger, etc. Chargers usually convert 220 volts to a suitable DC voltage. According to the type of rechargeable battery, the charging management circuit is added, which has the function of charging battery.
The power supply provided to the device is usually called a power adapter, such as a surveillance camera or electronic device, which is different from the design requirements of a USB charger. USB charger needs to meet the needs of different frequency bands and different currents, while the power adapter provided by monitor and camera tends to be current stable.
Power adapter is mainly used for small electrical and electronic products. It is basically a constant voltage source, keeping the output voltage unchanged, and automatically adjusts the output current according to the power consumption of the device load. Switching power supply is a switching current device which controls the whole switch and is suitable for all electronic equipment.
