How to use the power adapter safely?

<p>A long period of power on will keep the adapter working and affect its service life. Also, take care of the connection between the power cord and the adapter so that the cord is not bent at a dead Angle, which may break the cord. The <a href="https://www.richuponcable.com/adapter" rel="noopener noreferrer" target="_blank"><strong>adapter</strong></a> connection should also avoid bending, otherwise it will cause bad contact. Although adapters operate at a broadband operating voltage ranging from 100V to 240V, they can also cause damage if used with an unstable voltage. So how to use the power adapter safely?</p><p><br></p><p>Tips for safe use of power adapters</p><p><br></p><p>As we all know, the laptop power adapter is made up of two parts, one is the power adapter, the other is the power cord and the socket for the laptop. When the part of the power adapter fails, sometimes we just need to change the part. The socket side does not need to be changed. So now the question is, can the same nominal voltage, if the output current is different, be used on the same laptop? The basic principle is that a large nominal current power supply can replace a small nominal current power supply.</p><p><br></p><p>Notebook adapter is actually a high precision, high efficiency switch type voltage regulator power supply, its role is to convert 220V ac mains power into low-voltage direct current, for the normal work of the notebook to provide stable power, it is even known as the notebook "power source". Because the power adapter is a switching power supply that works in the state of high voltage and large current, the workload is heavy, and it is a fully closed structure, there is no cooling hole on the shell, and there is no fan to assist the heat dissipation, so the internal temperature of the power adapter is very high when it is working. Especially in the hot summer, touch the surface can feel hot, the internal temperature is higher. Therefore in the daily office, entertainment, to it proper maintenance and maintenance.</p><p><br></p><p>Create good heat dissipation. In hot summer, we can put the power adapter side to the environment. When using the laptop in a high temperature environment, the power adapter should be placed away from direct sunlight and ventilated place; Do not put the power adapter in the notebook near the heat outlet, otherwise not only the power adapter heat emission does not go out, but also absorb a part of the heat to increase the adapter and air contact area, so that the adapter heat better out. For better heat dissipation, you can also pad the adaptor with a narrow plastic or metal block between the adaptor and the table to increase the air convection around the adaptor and increase the adaptor's heat dissipation.</p><p><br></p><p>Any power supply has some internal resistance, so when the power supply outputs the current, there will be an internal voltage drop, which is equal to the output current times the internal resistance. The voltage drop causes two things, one is to produce heat, which is equal to the output current squared times the internal resistance, so the supply will be hot, and the other is to change the output voltage to the nominal voltage minus the internal voltage drop, causing the output voltage to drop. When the output current reaches this value, the output voltage is reduced to 95% of the nominal voltage or other ratio. Manufacturers can set higher or lower ratio according to the different needs of the load products. This current value is the nominal current.</p><p><br></p><p>When the power adapter is found to be too hot should immediately stop using, if a short time of use are found to be very hot, then may be the use of the power adapter and notebook original power adapter voltage current difference is relatively large, it is recommended to compare the original standard current voltage. If there is any deviation, please replace it immediately, otherwise it may burn out the computer and cause unnecessary loss.</p><p><br></p><p>Three major points of insulation for power adapters</p><p><br></p><p>A lot of people will hear in the new product development process of switching power supply adapter, not only the need for a comprehensive consideration of product packaging, circuit design, heat design and anti electromagnetic interference, insulation cover design is also a very important design link. This article will briefly analyze insulation cover design, help engineer a thorough knowledge of the insulation cover design key points of the adapter, power adapter in the process of working, suddenly sometimes appear in the circuit surge voltage is higher than the risk, in order to ensure normal operation of the circuit, it must take the appropriate insulation screen technology. The following power adapter manufacturers will carefully talk about the power adapter insulation three major points. Usually, more common insulation cover technology is generally divided into the following types:</p><p><br></p><p>First of all, we are more common insulation technology is strengthening insulation technology. This technique is one of many insulation systems designed to avoid electric shock and is functionally equivalent to double insulation. In circuit design using reinforced insulation, the minimum thickness of a single layer used inside is greater than or equal to 0.4mm, so that several layers of insulation can be secured, but each layer cannot be tested alone.</p><p><br></p><p>Another common method of insulation in China is base insulation. This technology is the most basic insulation method to avoid switching power supply adapters from being shocked. It is also a relatively clear insulation technology introduced in various textbooks at present. This paper will not be described here too much. However, the foundation insulation alone is not absolutely safe, and the engineer needs to reach the safety request through additional insulation and cover ground secondary cover, such as insulation between coils.</p><p><br></p><p>Different types of circuits require different types of insulation:</p><p><br></p><p>1, this kind of equipment to take cover ground, that is, metal chassis to cover ground, as a level 1 cover. Only foundation insulation, such as station communication power supply, is required between any risk voltage parts and the chassis.</p><p><br></p><p>2, use double insulation and reinforced insulation, no metal case and ground screws, such as portable charger.</p><p><br></p><p>It is powered by SELV source and external potential risk-free voltage generating source, thus requiring only foundation insulation, such as circuit board power supply.</p>