According to statistics, now 80% of electronic products are inseparable from power adapters, and 10% of electronic products are right
Power adapter has very special requirements. So how to choose the power adapter?
The power adapter is also called external power supply (for example, the common power supply of mobile phones and laptops)
Source adapter) is a power supply voltage conversion equipment for portable electronic equipment and electronic appliances. Its main function is to convert the mains power (such as domestic 220V voltage) into a stable low voltage of about 5V to 20V that electronic products can work. With the continuous development of science and technology, the application practice of various scientific research projects has increased the demand for power adapters year by year, and put forward many requirements for types. Let's take a look at the main classification of power adapters and the selection methods of power adapters all over the world.
Classification of power adapter:
According to the appearance classification, the power adapter can be divided into wall plug-in type and desktop type; USB according to different interfaces
Interface, serial interface, parallel interface, etc; According to its output type, it can be divided into AC output type and DC output type; Here, intermodal mainly introduces two classification methods of power adapters in the power industry: linear power supply and switching power supply.
1. Linear power supply
The linear power supply is to transform the alternating current through the transformer and obtain the unstable voltage through the rectifier circuit rectification and filtering
DC voltage. In order to achieve high-precision DC voltage, the power adapter must adjust the output voltage through the voltage feedback circuit.
Advantages: this power supply technology is mature, the circuit is simple, and there is no interference and noise of switching power supply.
Disadvantages: the voltage feedback circuit works in a linear state, the power consumption of the regulator is large, and the conversion efficiency is low,
Due to the use of inductive transformer, the equipment weight is large.
2. Switching power supply uses modern electronic technology to control the time ratio of switching on and off,
A power supply that maintains a stable output voltage. The switching power supply of power adapter is generally composed of pulse width modulation (PWM) control IC and MOSFET
Advantages: high working efficiency, small volume, and can work in a wide voltage range.
Disadvantages: it has great interference to the power circuit and is difficult to repair in case of failure.
2、 Selection and differentiation of different national standards;
UL, CE, GS, CCC, PSE, Australasia
SAA, and some other countries.
We can meet the requirements of the product by providing the following parameters when selecting the power adapter
Requirements: 1. Output voltage; 2. Output current; 3. The country where the product to be used is located; 4. Required appearance type: 5. Required standard of DC head: 6. Main product type: 7. Length of output and input lines (wall plug-in has no input line).
Eahunt power adapter, switching power supply, led lamp power supply and charger all adopt chip IC scheme. The product quality is produced according to national standards. The voltage is completely set according to your requirements, and the power is from 0W to 800W, which can definitely meet your requirements. Please consult us for specific parameters and requirements.
