公开(公告)号：US12088198B2

公开(公告)日：2024-09-10

申请号：US17646481

申请日：2021-12-30

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-Ju Tsai ,  Ching-Jan Chen ,  Zhen-Guo Ding ,  Zhe-Hui Lin ,  Wei-Ling Chen

IPC: H02M3/158 ,  H02M1/00 ,  H02M3/157

CPC classification number: H02M3/158 ,  H02M1/0025 ,  H02M3/157

Abstract: A power stage circuit generates an output signal according to an input signal and a control signal. A ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. A calculation circuit generates a calculation signal according to the output signal and a reference signal. The calculation circuit operates in a first mode when the power converter operates in a light loading state, and the calculation circuit operates in a second mode when the power converter operates in a normal state. A control circuit generates the control signal according to the calculation signal and the ramp signal. The control circuit includes a comparator circuit and a control signal generator. The comparator circuit generates a comparison signal according to the calculation signal and the ramp signal. The control signal generator generates the control signal according to the comparison signal.

公开(公告)号：US11973425B2

公开(公告)日：2024-04-30

申请号：US17646478

申请日：2021-12-29

Applicant: NOVATEK Microelectronics Corp.

Inventor： Chieh-Ju Tsai ,  Ching-Jan Chen ,  Zhen-Guo Ding ,  Zhe-Hui Lin ,  Wei-Ling Chen

IPC: H02M3/157 ,  H02M1/00 ,  H02M3/158

CPC classification number: H02M3/158 ,  H02M1/0025 ,  H02M3/157

Abstract: A power converter includes a power stage circuit, a ramp generator circuit, and a control circuit. The power stage circuit generates an output signal according to an input signal and a control signal. The ramp generator circuit generates a ramp signal according to the control signal, the input signal, and the output signal. The control circuit generates the control signal according to the output signal, a reference signal, and the ramp signal.