As the notebook frequency update rapidly day by day, LCD display upgrade month by month, laptop adapter power become steadily high an high, HP 4710S power adapte even reaching 100W or so, almost a small desktop PC power supply! When touch it, timid perhaps will be surprised, honey, is simply a hot potato! Will it catch fire? That is why lots of people worry about! Compaq, IBM is a big company,and too many times to recall the power adapter, it is because of concern about power adapter potential design flaws,and result in a fire!
In fact, as long as HP Probook 4710S power adapter temperature is in the design range, that is, the temperature in the normal range, generally is not dangerous! But why the supply is hot? What kind of temperature range is normal? Conversion efficiency of switching power that can supply only meet about 75% -85%. The answer is here. Switching power conversion efficiency is high enough, right now it's hard to find a better Switching power conversion supply. During the voltage conversion, some of the lost energy loss, and a few of part lost in the form of waves, most of t emitted with heat. The larger switching power supply, the more loss of energy. Also the much greater heat. This is why to add a desktop fan for cooling. Let us figure it, one 100W switching power supply, how much loss of energy on it!
Therefore, during Probook 4710S switching power supply design and production, be sure to select the heat resisting components. Of course, must control power temperature in the application that environment allows.
First of all, designed to make the conversion efficiency as high as possible, and secondly, to choose low pressure drop, low loss switching devices and the third is to carry out thermal design, heat dissipation area to be as large as possible, 100W switching power supply or more should have metal perforated casing generally, or with cooling fan. The current laptop power adapter power is generally about the sixties and seventies W, adopt heat sealed plastic package, the heat generated internally conductive through plastic shell primarily. Therefore, the surface temperature of the power adapter is still quite high, the highest temperature even reached seventy degrees! Think inside the adapter, like fire! Therefore, when we using a laptop, should placed the power adapter in ventilation better place as far as possible, do not placed anything in power above like books. As for the kind of hot feeling, no need to worry about HP Probook 4710S Battery power, no heat will be strange too!
Post je objavljen 19.03.2011. u 13:56 sati.