What is a power adapter? Power adapter is a power supply conversion device for small portable electronic equipment and electronic appliances. It generally consists of a casing, a power transformer and a rectifier circuit. According to its output type, it can be divided into AC output type and DC output type. Divided into wall-mounted and desktop. Widely used in telephone handsets, game consoles, language repeaters, walkmans, laptops, cellular phones and other equipment. In some cases, the laptop battery is suddenly underpowered without a power adapter, which is very anxious and embarrassing. Some friends may try to borrow other people's laptop computer power adapters, but everyone should be aware that different brands of laptop computer power adapters are not universal.
I. Different interfaces: Most laptop computer power adapters have different interfaces. Different interfaces are relatively safe, because at least you will not insert a power adapter that does not meet the current or voltage to power the laptop, which will cause damage to the computer hardware.
Second, the voltage is different The voltage of different brands of notebook computer power adapters is different, for example: under normal circumstances, IBM is 16V, Sony is 19.5V and so on. Even if the power adapter interfaces are the same, laptop power adapters of different brands cannot be used to supply power;
Third, the current is different Different brands of notebook computer power adapter current is also different, for example: under normal circumstances IBM is 4.5A, Sony is 4.1A and so on. Check the voltage and current specifications even for power adapters between laptops of the same brand.
Summary: As for the problem of heat generation of the notebook power adapter, no matter the power supply has a certain internal resistance, so when the power supply outputs current, a voltage drop will be generated internally, resulting in two things, one is generating heat, so the power supply will be hot, The other is to reduce the output voltage, which is equivalent to internal consumption. But the longer you use it, the more heat it produces.
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