What is the selection method of DC-DC Adapter?

DC-DC Adapters are widely used to efficiently generate stable voltages from power sources that may or may not be well controlled to loads that may or may not be constant.

How to check if the DC-DC Adapter is faulty?

What is the selection method of DC-DC Adapter?

What are the parameters of the DC-DC Adapter?

How to check if the DC-DC Adapter is faulty?

①. Regarding the above problems, first check whether the DC-DC Adapter is normal.

②. Check whether there is a problem of poor contact inside the DC-DC Adapter.

③. Check the DC-DC Adapter plug and the charging input interface of the notebook computer to see if there is poor contact between the two.

④. Check whether the battery inside the notebook is normal.

⑤. If the above four points are all normal, then this situation is likely to be on the main board, and the charging control circuit is faulty.

What is the selection method of DC-DC Adapter?

1. The voltage is the same or similar. The nominal input voltage of your computer is 16V, and the rated output voltage of the adapter below is 20V, which is quite different. If you cannot replace it in this way, it may damage the computer.

2. The polarities of the plugs are the same. The polarity marked on your notebook is positive inside and outside negative. I really can't see what polarity is marked in the picture of the DC-DC Adapter. If you look carefully, if the symbol is different from the one marked on the notebook, it is absolutely no.

3. The rated output current of the DC-DC Adapter cannot be less than the rated input current of the computer. The maximum input current marked on your computer is 3.36A, so when you buy a power adapter, you should buy one with an output current greater than or equal to 3.36A. Wasteful, and very bulky, generally a little larger than that, leaving some margin.

What are the parameters of the DC-DC Adapter?

Power Efficiency

Power supply efficiency is closely related to the power supply design circuit. A high-efficiency power supply can improve the efficiency of electric energy use, and to a certain extent, can reduce the power consumption and heat generation of the power supply.

Rated voltage

Used to calibrate the device, the voltage that can be applied to the two ends of the overvoltage protector for a long time.

rated power

Rated power generally refers to the effective power that can be continuously output; that is, the maximum power that can continue to work under normal working conditions. Rated power should be the most important parameter specification of a power supply. If the rated power of the power supply cannot meet the needs of your computer, various unpredictable problems may follow.

Pulse current width

According to the standard DIN VDE 0675 part 1 of the test current for overvoltage protection devices, the device under test must be able to withstand this current 20 times.

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