subject: why the first wife of the power supply is usually better than non-first wife [print this page] Here to talk about why the first wife of the power supply is usually better than non-first wife. I want to say first wife's power in theory is relatively better, in fact, may not feel different. Allowable load is usually a safe range of input voltage, such as the nominal value plus or minus 5%, one example is that many 2.5-inch hard drive 5v input requirement is plus or minus 5%. Ac adapterAcer laptop ac adapter Notebook, too, if the input voltage is too large or too small will result in protection circuit action, in order to stop work. But the action in the protection of the circuit before the books have been biased internal regulator circuit working upper or lower limit, in principle, have an impact on device lifetime, but according to today's point of view, the reliability of electronic components has been quite good, as long as the design range, rarely a problem, life will not be short life than books, so this is not the main problem. More important issue may be the books of the data security, a sudden stop working for the automatic protection of the computer is a terrible thing, especially a lot of friends without the battery. Sometimes a reboot the computer somehow and relevant. For the first wife of the power supply, the manufacturers know what kind of access is a load, so you can easily calculate the nominal power supply voltage and nominal current, the nominal voltage power supply should meet the following two conditions, first when the nominal maximum current output voltage minus the power supply itself, the required voltage drop should be greater than 95% of the load, and the second is the minimum time to design voltage current output minus the power supply itself, the load should be less than the required voltage drop of 105 %. However, if the adapter using a non-original equipment, such as general purpose transformers and the like, the problem can not be seriously considered,
this is from the electrical parameters of the user can only think of ways to be compatible as far as possible, but the resistance is different for each adapter , the nominal voltage of the allowable error may be different, under the nominal current output voltage range of the definition may be different, and even output ripple factor is not small enough not necessarily, if not carefully measured the output power with the relationship between the output voltage, in principle, there is a certain risk, but this risk is small, because if you choose to supply enough current nominal resistance does not appear the problem is too large, the ripple coefficient can also be stable within books pressure to reduce, so I said, first wife of the power supply is usually better than non-first wife. This is the first wife and the general power supply difference. Laptop power adapter (hereinafter referred to as power) as the standard accessories of laptop has not been all the attention, mainly because of damage to power accessories such risk is very low, many people may wait until the laptop when reimbursed , the power adapter is still Laojifuli. However, with the continuous improvement of living standards, people's lifestyle is undergoing change, many users have begun to maximize the weight loss for their notebooks, more and more people choose their homes in the company and have placed a power supply, plug the power to reduce the inconvenience of commuting, so purchase a second power supply into a lot of people's choices, but the market flooded with fake laptop power supply, these counterfeit products are usually also business as "OEM version", "assembly "" compatible "power of the name, used to deceive consumers, after all, is the fake fake. They cut corners on the exterior and interior circuit, rough work, compared with the original big difference, today we have to ThinkPad notebooks,
why the first wife of the power supply is usually better than non-first wife
By: combattery84
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