Regardless of any power adapter supply has a certain internal resistance

An exception should be promptly discontinued

An exception should be promptly discontinued. Loud work in the power adapter or even smoke when the noise is often damaged or have problems, should immediately stop using, by professional engineers through inspection before it can once again put into use.

3. Using non-original power supply to be cautious. Non-original power adapter output interface, such as voltage and current values are some differences that may exist (or does not match the nominal and real), if matched properly, may affect the stability of the notebook to run even more serious consequences. In addition, the same brand of different models of notebook power adapter for use at the time should also be careful, after this paper we have described in detail.

Adapter is how the heat generated

Regardless of any power supply has a certain internal resistance, so when the power supply output current when the pressure drop in internally generated, equal to the output current multiplied by the power supply internal resistance. Pressure drop will result in two things, one is to produce heat, equal to the square of the output current multiplied by resistance, so the power will be hot, the other is the nominal voltage minus the output voltage into the internal voltage drop, causing the output voltage drop # p # # e # low.

She Jizai Kaolvwanbi usual heat Wentizhihou, Yibanxianzhi a Dian Liu Zhi, when Shuchu current to this value is, the output voltage Xiangdi to 95% of nominal voltage, or other Bi Li, Ge manufacturers Genjufuzai product of may install be higher or lower ratio, the current value is the nominal current.

Such as the ThinkPad 16V 72W power adapter nominal current is 4.5A (16 4.5 = 72). If the load resistance is too low, causing the output current exceeds the nominal current, generally two things will happen, one more than the individual components because heat capacity resulted in the burning heat damage caused by power supply, the other is the thermal design margin left, only visible in the output voltage is further reduced, if reduced too much may cause the load not work correctly. PA-1900-02D AC Adapter

DC359A AC Adapter

Regardless of any power adapter supply has a certain internal resistance

By: xuchunfeng1984

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