The same power adapter, why is the laptop power adapter so big?
2022-09-25 Views：25
Whether it is a laptop or a cell phone, the thinner and lighter the appearance of the model is always loved. Only the power adapter most power adapters have not kept pace with the development of smart devices to achieve the ultimate thin and light, although a lot smaller than before, but still the black box looks a little "heavy". So why is the laptop power adapter so big?
Laptop demand for a stable constant-voltage DC power supply, and the home power supply is usually about 100V-240V (alternating current, AC for short), generally unstable power supply is unable to directly charge the laptop, or it will damage the battery and laptop. So the invention of such a "heavy" laptop power adapter.
It works by turning the unstable power supply into a constant voltage DC power needed by the laptop through a conversion circuit to power and charge the laptop. And in this must also have over-current protection circuit, overvoltage protection circuit, short circuit protection circuit and other kinds of protection circuit.
The link of voltage conversion alone, 220V AC first through the rectifier circuit into high-voltage DC, and then through the switch tube into a high-frequency high-voltage pulse, and then converted to low-voltage pulse through the transformer, and then through a rectifier, voltage regulator circuit, into a stable DC power. Buck, rectification, filtering and a series of processes so intensive circuit, because the internal components of the computer than the kettle, induction cooker a class of other high-power appliances more "weak", so the need for adapters to provide more protection, which leads to the notebook power adapter is still so large.
For more information about power adapter, please pay attention to Shenzhen BON Electronics Co.，LTD.
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