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The information presented in this cross reference is based on TOSHIBA's selection criteria and should be treated as a suggestion only. Please carefully review the latest versions of all relevant information on the TOSHIBA products, including without limitation data sheets and validate all operating parameters of the TOSHIBA products to ensure that the suggested TOSHIBA products are truly compatible with your design and application.
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开关稳压器的工作原理
下载“第Ⅳ章：本地电源IC” (PDF:770KB)
降压型转换器
左下图显示了运动图像。矩形波由MOSFET重复开关产生。该波作用于线圈。对矩形波进行平整（平均）可以得到所需的直流电压。输出电压值由矩形波占空比决定。
升压型转换器
如右下图所示，当MOSFET接通时，电流主要流过线圈和MOSFET。此时，能量在线圈中积聚。线圈的工作旨在释放积聚的能量并抑制电流的变化。当MOSFET关断时，到此为止流过线圈的电流将失去方向。但由于线圈的持续电流特性，线圈端的电压升高，电流流过二极管，电容器充电。这会导致超过输入电压的电压产生。
