120 views Yuda Electronic (HK) Technology Co.,Limited. 2019-12-16
The power adapter is a small-sized portable electronic device and a power conversion device for electronic appliances. It has an external power supply and is connected to the host with a cable. This can reduce the size and weight of the host.
Pay attention to single-point grounding of digital circuits and analog circuits, and single-point grounding of high-current circuits and small currents, especially current and voltage sampling circuits, in order to reduce common resistance interference and the impact of the ground loop;
Pay attention to the distance between adjacent lines and signal properties when wiring to avoid crosstalk;
Reduce ground impedance;
DC15V output power adapter
In order for a laptop to work stably, a stable DC voltage must be provided. This device that provides stable DC voltage is a DC stabilized power adapter. This DC stabilized power adapter, in addition to providing a stable DC power adapter for the electronic circuit of a notebook computer, must also have high reliability, safety and environmental resistance.
The materials used in the power adapter’s internal electronic components are roughly divided into three types, the lowest level is used or fake; the middle level is inferior; the highest level is good. Generally low-quality power adapters will use old materials and fake materials to fill up. Miscellaneous manufacturers will use better secondary materials, and only the first-tier brands will use the best quality authentic materials. Therefore, the price of two 36W power adapters of the same level will be completely different.
1.Over-voltage protection to prevent excessive voltage;
2. Overcurrent protection, automatic protection when the current is too large;
3.Temperature abnormal protection to prevent excessive temperature;
4. Over power protection to prevent power overload;
5.Lightning protection to prevent damage caused by lightning;
6.Electromagnetic field protection from external electromagnetic influence;
7.Short circuit protection
There is a nameplate on the power adapter, which indicates the power, input and output voltage, and current indicators. Pay special attention to the range of the input voltage. This is the so-called “travel power adapter.” This feature is very useful. Some laptops are sold only in the country of origin and do not have this compatible voltage design. When used under 220V mains voltage, it may burn out.
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