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MC-4/11/10/400
MC-4/11/10/400
MC-4/11/10/400
电源的工作原理
发电机能把机械能转换成电能，干电池能把化学能转换成电能。发电机、电池本身并不带电，它的两极分别有正负电荷，由正负电荷产生电压（电流是电荷在电压的作用下定向移动而形成的）。日常生活中常用的锌锰电池还有铅蓄电池都是在电池内部通过化学反应产生电动势驱动电路工作的。
电荷导体里本来就有，要产生电流只需要加上电压即可，当电池两极接上导体时为了产生电流而把正负电荷释放出去，当电荷散尽时，也就荷尽流消了。晶体三极管能把前面送来的信号加以放大，又把放大了的信号传送到后面的电路中去。晶体三极管对后面的电路来说，也可以看做是信号源。整流电源、信号源有时也叫做电源。
电源IC种类繁多，共同特点有
一般的工作电压为3.0～3.6V。有一些工作电压更低，如2.0、2.5、2.7V等；也有一些工作电压为5V，还有少数12V或28V的特殊用途的电压源。
工作电流小
从几毫安到几安都有，但由于大多数嵌入式电子产品的工作电流小于300mA，所以30～300mA的电源IC在品种及数量上占较大的比例。
完善的保护措施
新型电源IC有完善的保护措施，这包括：输出过流限制、过热保护、短路保护及电池极性接反保护，使电源工作安全可靠，不易损坏。
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36 STI OPTOFence Transmitter OF4136B-2FB2 0F4136B
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36 Heidenhain LS 603C Digital Readout DRO Scale LS603C No Reader Head
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30 Amp Marathon 3 Pole Fuse Terminal Block 6R30A3SP
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30 Amp Marathon 3 Pole Fuse Terminal Block 6R30A3B |
