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徒弟:何谓开关电源稳压控制电路? 师傅:开关电源稳压控制电路,一般指的是取样比较电路和脉冲调制电路的统称。其作用是通过控制开关管的导通和截止时间即开关脉冲的占空比来调整输出电压大小,使之达到稳压目的。根据取样电压取法的不同,取样电路可分为直接取样方式和间接取样方式两种。取样电压直接取自开关电源电路输出电压的称作为直接取样方式,而取样电压是通过开关变压器取样绕组上形成的脉冲电压,经整流滤波得到直流电压的叫做间接取样方式。
Apprentice: What is the switching power supply regulator control circuit? Master: Switching power supply regulator control circuit, generally refers to the sampling circuit and pulse modulation circuit collectively. Its role is through the control of the switch on and off time that the duty cycle of the switching pulse to adjust the size of the output voltage so that it can achieve the purpose of regulating. According to the different sampling voltage, the sampling circuit can be divided into direct sampling and indirect sampling two ways. The sampling voltage is taken directly from the output voltage of the switching power supply circuit as a direct sampling method. The sampling voltage is a pulse voltage formed by sampling the winding of the switching transformer, and the DC voltage obtained through rectification and filtering is called an indirect sampling method.