【摘要】 介绍并比较了电压控制型和电流控制型开关电源的基本原理，提出了一种电压控制型开关电源加电流截止负反馈的方法。由ＳＧ３５２５实现的开关电源电路实例，证明了这种电路的优点。更多还原

【Abstract】 This paper introduces and compares the basic principle of voltage control type and current control type switching power supply. A way of voltage control and current blocking negative feedback is presented. A switching power supply realized by SG3525 is introduced. The practice shows the advantage of this scheme.更多还原