公开(公告)号：US10811966B1

公开(公告)日：2020-10-20

申请号：US16528169

申请日：2019-07-31

申请人： NCKU Research and Development Foundation ,  Himax Technologies Limited

发明人： Kai-Yu Hu ,  Chien-Hung Tsai

IPC分类号： H02M3/157 ,  H02M1/08 ,  G05F1/575 ,  H02M1/00

摘要： A digital constant on-time controller adaptable to a direct-current (DC)-to-DC converter includes a current sensing circuit that senses stored energy of the DC-to-DC converter, thereby generating a sense voltage; a semi-amplitude detector that detects half of a peak-to-peak amplitude of the sense voltage, thereby generating a semi-amplitude voltage; a DC voltage detector that detects a DC voltage across an effective series resistor of an energy storage circuit that provides the stored energy of the DC-to-DC converter, thereby generating a DC voltage; an arithmetic device that adds the sense voltage and the semi-amplitude voltage, from which the DC voltage and a predetermined reference signal are subtracted; and a pulse-width modulation (PWM) generator that generates a switch control signal according to a result of the arithmetic device.

公开(公告)号：US10291121B1

公开(公告)日：2019-05-14

申请号：US16153467

申请日：2018-10-05

申请人： NCKU Research and Development Foundation ,  Himax Technologies Limited

发明人： Kai-Yu Hu ,  Chien-Hung Tsai

IPC分类号： H02M3/157 ,  H02M1/08 ,  H02M3/158 ,  H02M1/00 ,  G05F1/575 ,  G05F1/565 ,  H02M3/156

摘要： A digital constant on-time controller adaptable to a direct-current (DC)-to-DC converter includes a current sensing circuit that senses stored energy of the DC-to-DC converter, thereby generating a sense voltage; an offset cancellation circuit coupled to receive the sense voltage, thereby generating an offset-removed sense voltage according to a valley voltage of the sense voltage; a comparator that compares the offset-removed sense voltage with a reference signal; and a pulse-width modulation (PWM) generator that generates a switch control signal according to a comparison result of the comparator.