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Why is the laptop power adapter so large？

Article Source：Kinri Energy | Author：Kinri Energy | Issuing Time：2024.04.28
The reason why the laptop power adapter is designed so large is mainly due to the limitations of its internal structure and the development of technology. Modern laptops generally use lithium batteries, and the output voltage of lithium batteries is generally around 10V. In order to fully utilize AC power and convert it into DC power through transformers, laptop power adapters need to convert AC power with a voltage of over 100V into 10V DC power. Therefore, large capacity transformers and capacitors are needed as components. At the same time, in order to ensure continuous and stable power output during use, the adapter also needs to have certain overcurrent, overvoltage, short circuit protection functions, etc., which also leads to an increase in its volume.



Upgrade of laptop power adapter

Although the bulky adapter has brought some inconvenience to lightweight laptops, manufacturers have not stopped working hard to improve this. In recent years, some laptop adapters have become smaller and more compact to meet consumers' demand for thinness. For example, while ensuring the functionality of the adapter, manufacturers have adopted a more compact design and materials, resulting in a reduction in the size and weight of the adapter.

In recent years, with the development of semiconductor technology, the design of power adapters has also been constantly upgraded, and more compact and lightweight designs have gradually emerged, such as USB-C power adapters. The USB-C power adapter adopts new semiconductor materials and more efficient conversion technology, which can complete more power conversion tasks in a smaller space. In addition, due to the popularity of USB-C interfaces, more laptops can transmit power and data through USB-C interfaces, which further reduces the size and weight of power adapters.

In summary, the laptop power adapter is designed so large mainly to ensure its performance and functionality. Although smaller and more lightweight designs have emerged, prior to this, the large size of power adapters was the best choice made under the premise of technological level.
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