News

Do you know what the role of the power adapter is?

2022-12-08 Views：30

What is the role of the power adapter?BON introduces you to the role of the power adapter is a transformer and rectifier. Home AC power is 220v, and our computer land is DC 12v, so it can be sure that the power adapter is a transformer and rectifier.

Then the adapter is a transformer, we should know, AC 220v through the transformer voltage, through the rectifier to DC, here is the consumption, and these consumption will be transformed into heat, so the power adapter will be hot is also normal. Transformer is made of silicon steel, the transformer is energized, generating magnetic flux, magnetic flux will incur the force between the silicon steel, thus generating a humming sound, which is normal.

But too much earth sound is not normal, for many reasons:
1. The AC voltage is unstable.

2. The chip is broken.

3. Short circuit between turns.

4. Component damage.

Power adapter can not be universal for three main reasons:

1. The interface is different; most laptop power adapter brands between the interface is different, which means that the use of other brands of power adapter simply can not be plugged into the computer assembly into your laptop for power supply. Interface is different is relatively safe, because at least you will not insert the current or voltage does not match the power adapter to power the laptop, and lead to damage to the computer hardware.

2. The voltage is different; different brands of laptop power computer configuration sheet adapter voltage is not the same, for example: in general IBM is 16V, Dell is 20V, Hp is 18.5V, Sony is 19.5V, etc.. This shows that even if the power adapter interface is the same, you can not use a different brand of laptop power adapter for power supply.

3. The current is different; different brands of laptop power adapter current is also different, for example: in general IBM is 4.5A, Dell is 3.34A, Hp is 2.7A, Sony is 4.1A, etc.. In fact, the same brand of laptop power adapter voltage and current is not the same. Therefore, even if the same brand of laptops between the scurrying with power adapter should also confirm the voltage and current specifications.

Precautions for power adapter Do you know the working principle of cell phone charger circuit?