The power adapter is an interface transfer device, that is, an adapter. Its main function is to stabilize voltage, that is, to stably import AC / DC power into the electrical equipment. There is no storage of power. Once there is no AC / DC power, the adapter can not effectively let the electrical equipment get power. It is generally composed of shell, power transformer and rectifier circuit. It is mainly suitable for small portable electronic equipment and power supply conversion equipment of electronic appliances. It is also an auxiliary supporting equipment. As a built-in power supply or an external power supply, the adapter can be an independent hardware interface device or an information interface.
The common power adapter in the market is a power converter through voltage transformation, rectification and voltage stabilization. The output is DC. When the power is met, it can be understood as a low-voltage regulated power supply. It is widely used in routers, cash detectors, printers, telephone motherboards, game consoles, speech repeaters, notebooks, massagers, LCD screens and other equipment. Most power adapters can automatically detect the input voltage of 100 ~ 240V AC (50 / 60Hz).
The power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It places the power supply externally and connects it with the host with a line, which can reduce the volume and weight of the host. Only a few devices and appliances have the power supply built in the host. It is composed of power transformer and rectifier circuit. According to its output type, it can be divided into AC output type and DC output type; According to the connection mode, it can be divided into wall type and desktop type. There is a nameplate on the power adapter, which indicates the indicators such as power, input and output voltage and current. Special attention should be paid to the range of input voltage. If 110V input voltage is connected in China, the adapter may be burned out.
Charger is a kind of equipment that converts alternating current into low-voltage direct current. In the electric field with battery as working power supply or standby power supply, the charger has a wide application prospect. It has many kinds of classification, the most common is divided into: advanced business charger, seat charger, USB charger, car charger, etc. Another common is divided into lead-acid battery charger, nickel cadmium / nickel hydrogen charger and lithium battery charger according to raw materials.
The basic composition of lithium battery charger is the same as that of other rechargeable battery chargers, which is composed of 1. Shell, 2. Input / output line, 3. Circuit board, heat sink and various electronic components. In principle, it is composed of a stable power supply and necessary control circuits such as constant current, voltage limit and time limit.
It can be seen that the charger includes the function of the adapter because it has one more control circuit than the adapter. For example, the mobile phone charger includes three stages: constant current, constant voltage and trickle charging, which is determined by the charger's own design, while the charging control of the laptop is in the computer, and the adapter only plays the role of voltage stabilization, Without the constant current and voltage limiting design of the above charger.
