Power converter and ramp signal generation circuit thereof

The invention discloses a power converter and a ramp signal generation circuit thereof, the power converter comprises an inductor and a power transistor which are coupled between an input end and an output end, and the ramp signal generation circuit comprises a ramp signal generation module, the ramp signal generator is used for generating periodic ramp signals according to first control signals and second control signals; the adjusting module is used for generating an adjusting signal according to an inversion signal of the first control signal, and the adjusting signal is used for adjusting the slope of the ramp signal, so that the slopes of the ramp signal in at least multiple periods are different, and therefore, stable switching of the power converter between a DCM mode and a CCM mode can be realized; and the output voltage is kept stable. 本发明公开了一种功率变换器及其斜坡信号产生电路，所述功率变换器包括耦合在输入端和输出端之间的电感和功率晶体管，所述斜坡信号产生电路包括：斜坡信号产生模块，用于根据第一控制信号和第二控制信号产生周期性的斜坡信号；调节模块，用于根据所述第一控制信号的反相信号产生调节信号，所述调节信号用于调节所述斜坡信号的斜率，以使得所述斜坡信号在至少多