X' fatturi ħtieġa biex tkun ikkunsidrat in l-għażla ta' enerġija provvista"
Għal inġiniera, l-għażla ta' swiċċjar power supply is a process that needs to be completed for each solution. It appears to be a single choice question, but before the original is ultimately selected, engineers need to consider many factors. Of course, the question question of cost will come to mind at the top of our list. In illum's article, we want to clarify some essential elements that we need to pay attention to when selecting the most adaptable power module, in addition to cost, in the process of switching power supply selection.
Regarding the selection of switch power supply modules, we need to pay attention and consider many rules. For example, the nominal value of the stable wire is 1A, which refers to the policy at 25 degrees Celsius. However, assuming the equipment is operating at 50 degrees Celsius, the nominal value of the stable wire can become lower than 1A, and the plan margin at this temperature needs to be chosen larger. Similarly, the 1mH of inductance is not always 1mH, it is 1kHz. Assuming you use it at 1MHz, the value of the 1mH inductance sent by the processor is not 1mH. Due to the significant impact of the scattered capacitance in the inductance coil at 1M, it will offset some of the inductance's effect. The insertion loss of the filter is IL=25dB, which is the time when MHz Rs/RL=50 ohms (source impedance and load impedance). However, in practice, it is difficult for our filter to meet this requirement with impedance, so a 25dB insertion loss will result in a significant deduction. Magnetic beads, capacitors, diodes, resistors... all have similar rules. Next, let's talk about the rules for selecting switch power supply modules besides cost. There are various topological constructions of power modules, including flyback, forward, push-pull, half bridge, and full bridge, each of which has advantages in certain characteristic policies due to its diverse principles.
Clarify the application rules of several typical topological constructions. The primary issue is the flyback power supply, li ma ma discharge matul the charging period during a switching cycle. Due to this characteristic, its constant care and ripple characteristics are difficult to achieve. Although it can be handled by a large energy storage capacitor, the principle disadvantage is fl-aħħar mill-aħħar hard to defeat. Nuqqas ta' intelliġenza jista' be ikkumpensat through hard work, but it ma jistax jegħleb a ċert ostaklu meta tiltaqa' problemikritiċi problemi. Hemm huma wkoll kwistjonijiet bħal kbar tnixxija induttanza, but tagħha vantaġġi huma sempliċi ċirkwit, baxx cost, small size, no need to add magnetic reset windings, and usa'input voltage scheme. It is precisely għax of this li accounts for over 70% of the total power supply Suq.
