Hp 402018-001 Adapter supply nominal current value

Author: johnsunvalley

Author: johnsunvalley

In general, the real average no-load voltage of the power adapter is not necessarily exactly the same nominal voltage, because the characteristics of electronic components can not be exactly the same, so it allowed a certain margin of error, civil cases according to the need to control the use of 0.1% to about 5%. The smaller errors, the consistency of demand for electronic components, the higher the cost of industrial production, the higher the price of course, the more expensive.

Secondly, the powerToshiba PA3467U-1ACA Adapter Hp DC359A Adapter Hp 402018-001 Adaptersupply nominal current value. Regardless of any power supply has a certain amount of resistance, so when the power supply output current when the voltage drop in the internally generated, is equal to the output current multiplied by the power supply resistance. Led to two things, one is to produce heat, is 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 becomes the internal voltage drop, resulting in lower output voltage. The design is usually completed in considering the heat issues, the general restrictions on a current value, when the output current to achieve this is worth the time, the output voltage is reduced to 95% of nominal voltage, or other ratio, the manufacturers of products according to the different needs of the load can be set higher or lower proportion of the current value is the nominal current. Such as 72W power adapter for ibm16V nominal current is 4.5A (16 * 4.5 = 72, nonsense). If the load resistance is too low, resulting in the output current exceeds the nominal current, generally two things will happen, one more than the individual components due to heat capacity resulted in the burning heat damage caused by power supply, and the other is the thermal design margin left merely a reflection of the output voltage is further reduced, if reduced too much may cause the load not work correctly. About the Author:

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