source:power adapter Popular:adapter release time:2021-10-13 09:22:41 Article author:sznbone
How to choose a power adapter according to your needs!
1, the interface of the adapter matches the device;
Do not insert the mismatched interface without professional knowledge, otherwise it will be dangerous.
2, the output voltage must be the same as the rated input voltage of the load (mobile equipment), or within the voltage range that the load (mobile equipment) can withstand, otherwise, the load (mobile equipment) may be burned;
The principle of why the voltage is required to be consistent is this-the voltage is insufficient to drive the load, and the battery cannot be charged normally. The popular point is that the supply exceeds the demand.
3. The output current of the power adapter should be equal to or greater than the current of the load (mobile device) to provide sufficient power;
As to why such a current configuration is needed, it involves the principle of the circuit. Everyone knows that the power supply has internal resistance. The greater the internal resistance, the greater the loss. Therefore, when the manufacturer produces this adapter, it will determine the no-load output voltage within a certain range according to the size of the internal resistance, and the current critical value corresponding to the voltage critical value is the nominal current value we see. It means that the adapter has better loading capacity. Therefore, choosing a slightly larger current adapter will not harm the battery, but will make the charging faster.
After reading the above introduction, everyone has a basic understanding of power adapters and switching power supplies, and how to choose power adapters according to their own needs, and gives three easy-to-understand selection conditions. By reading this power supply article , It will be much easier to choose the power adapter in the future.
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