不连续导通模式PSM PT控制开关变换器

摘要

Pulse skip modulation(PSM) realized regulation the output voltage of switching DC-DC converter by the ON/OFF control of power switch,improves the light load of switching converter,but it still exists large output voltage ripple.The PSM PT control technique is proposed in this paper to utilize the advantage of PT control,and PSM control to reduce output voltage ripple,and to ensure the PT control switching converter stable working when no-load.%脉冲跳周期调制（Pulse Skip Modulation,PSM）采用ON/OFF控制对输出电压进行调整,提高了开关变换器的轻载效率,但存在输出电压纹波大的缺点。文中结合开关变换器的脉冲序列调制（Pulse Train,PT）控制与PSM技术,提出了开关变换器的PSM PT控制技术,其降低了输出电压的纹波,并使PT控制开关变换器在空载时能稳定工作。