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78xx [2016/06/06 18:34]
gongyu [参考资料]
78xx [2016/06/06 18:37] (当前版本)
gongyu [Advantages]
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 78xx ICs have three terminals and are commonly found in the TO-220 form factor, although they are available in surface-mount,​ TO-92, and TO-3 packages. These devices support an input voltage anywhere from around 2.5 volts over the intended output voltage up to a maximum of 35 to 40 volts depending on the model, and typically provide 1 or 1.5 amperes of current (though smaller or larger packages may have a lower or higher current rating). 78xx ICs have three terminals and are commonly found in the TO-220 form factor, although they are available in surface-mount,​ TO-92, and TO-3 packages. These devices support an input voltage anywhere from around 2.5 volts over the intended output voltage up to a maximum of 35 to 40 volts depending on the model, and typically provide 1 or 1.5 amperes of current (though smaller or larger packages may have a lower or higher current rating).
  
-====Advantages==== +====优点==== 
-78xx series ICs do not require additional components to provide a constant, regulated source of power, making them easy to use, as well as economical and efficient uses of space. Other voltage regulators may require additional components to set the output voltage level, or to assist in the regulation process. Some other designs (such as a switched-mode power supply) may need substantial engineering expertise to implement. +78xx系列器件不需要外围的元器件就可以提供稳定的电压输出,使用起来非常简单,并且也节省板上面积。其它的稳压器也许会需要附加的元器件以设置输出电压值或者用于帮助稳压。 
-78xx series ICs have built-in protection against a circuit drawing too much current. They have protection against overheating and short-circuits,​ making them quite robust in most applications. In some cases, the current-limiting features of the 78xx devices can provide protection not only for the 78xx itself, but also for other parts of the circuit.+78xx系列的器件内置过流保护、过热保护以及短路保护电路,多数应用场合下非常可靠。
  
 ====Disadvantages==== ====Disadvantages====