charger:
A charger is a device that only charges a battery, usually with a charging indicator, such as a battery car charger. He can't be called an adapter.
Switching power supply is a method to convert 220V voltage into low-voltage DC, which is different from the traditional power frequency transformer. The power supply using this switching voltage conversion technology is called switching power supply, charger and power adapter are currently using switching power technology. At present, switching power supply is widely used in almost all electronic equipment with the characteristics of small, light weight and high efficiency. It is an indispensable power supply mode for the rapid development of the electronic information industry.
In addition, the development and application of switching power supply is of great significance in saving energy, saving resources and protecting environment. The main power electronic devices used in switching power supply are diode and IGBT(insulated gate bipolar transistor). There are a few applications in switching power input rectifier circuit and soft start circuit, GTR drive is difficult, low switching frequency, gradually replaced by IGBT and MOSFET.
Power adapter:The power adapter is a small portable electronic equipment and electronic and electrical power supply conversion equipment, generally composed of shell, 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 mode can be divided into wall type and desktop type. Widely used in language rereading machine, Walkman, laptop and other equipment. The power adapter can be used not only for power supply, but also for charging an appliance, just like the power adapter for a laptop, it can charge a computer, can supply power to the computer. Such as the LCD monitor power adapter, and printer power adapter.
Most laptop power adapters can automatically detect 100-240V AC (50/60Hz). Almost all laptops have the power supply externally connected to the main computer through a wire, which reduces the size and weight of the main computer. Only a few have the power supply built into the main computer. On the power adapter, there is a nameplate indicating the power, input and output voltage and current flow indicators.
Chargers, switching power supplies, switching power adapters can (but don't have to) be the same thing,
The concept of switching power supply is to pay attention to the internal characteristics of the item, the concept of the charger is to pay attention to his use, the power adapter is highlighted as the main equipment auxiliary.