公开(公告)号：US11621635B2

公开(公告)日：2023-04-04

申请号：US17371785

申请日：2021-07-09

Applicant: Renesas Electronics America Inc.

Inventor： Long Yu ,  Jin Yang ,  Jianhua Yang ,  Pengcheng Tang ,  Xiaodong Zhan

IPC: H02M3/157 ,  H02M3/158 ,  H03K19/20 ,  H03K3/017 ,  H02M1/00

Abstract: Methods and apparatuses for regulating a power converter are described. A device comprising a control circuit and a logic circuit can be integrated in a controller coupled to the power converter. The control circuit can generate a constant off-time signal based on a ramp signal and an error signal. The logic circuit can generate a control signal based on the constant off-time signal and a constant on-time signal. The logic circuit can output the control signal to the power converter. In response to an on-time period of the constant off-time signal being less than an on-time period of the constant on-time signal, the control signal can vary according to the constant on-time signal. In response to the on-time period of the constant off-time signal being greater than the on-time period of the constant on-time signal, the control signal can vary according to the constant off-time signal.