Power adapter market trend analysis

Power adapter market is an important trend is the customer needs to have a higher output power, smaller size of the adapter , which involves the use of a new topology . Power Adapter mainly reflects some important trends . First, the work efficiency and standby ( no-load ) energy demanding. For example, the U.S. Environmental Protection Agency (EPA) " Energy Star" program in April 2008 released a version 2.0 of the external power supply specifications for external power supply EPA2.0 this version of the spec will be held November 1, 2008 came into effect. Power adapter includes two categories, one is the internal AC / DC (AC / DC) power converter, built- in electronic products internally and may possess multiple output voltages , such as a desktop computer's internal power supply, etc. ; reusable fitting the other is the external one-way output AC / DC or AC / AC (AC / AC) power adapter with single output voltage, typically referred to as an external power supply (EPS), widely used in printers , laptops , LCD monitors and gaming applications. In addition to the "Energy Star " kind of industry energy efficiency specifications, some large OEM customers may also have their own unique work of energy efficiency and energy requirements . For example, for computer power EPA4.0 norms for the use of an external power supply laptop and tablet PC requirements are primarily reflected in the standby power consumption (≤ 1.0W), dormant energy consumption (≤ 1.7W) , etc. ; comparison, Dell power requirements for this type of mainly reflected in the different load conditions specific energy efficiency , ie 0.7W ( input power Pin <1W), 1.5W (Pin <2W), 10.7W (Pin <12.6W) and 17W (Pin <20W) load conditions, can be respectively more than 70% efficiency , 75% , 85% and 85%. It is worth mentioning is that the future will continue to regulate the energy efficiency requirements continuously improve and evolve . With laptop AC-DC power adapter , for example, the industry in no-load mode, a high level of energy consumption is about more than 300mW , 150mW and future load mode energy consumption could become targets. Moreover, the requirement for multi-output adapter may also be included among the criteria . ON Semiconductor 's NCP1605 power factor correction (PFC) controller and NCP1396 resonant mode controller can be used to design 200W or 300W Desktop Adapter adapter. hydraulic hose adapters From the notebook adapter , its power requirements from 50W to 70W range has been increased to more than 100W rating. In addition, such as Apple and Lenovo ThinkPadX300 MacBookAir other new ultra- portable notebook power adapter is also smaller and lighter.