公开(公告)号：US10116211B2

公开(公告)日：2018-10-30

申请号：US14924910

申请日：2015-10-28

Applicant: MediaTek Inc.

Inventor： Yung Hsu Chen ,  Kuan-Yu Chu

IPC: H02M3/156 ,  H02M3/158 ,  H02M1/00

Abstract: A power converter with adaptive zero-crossing current detection is provided. The power converter includes a first transistor, a second transistor, a PWM (Pulse Width Modulation) controller, a low-pass filter, and a delay controller. The first transistor is coupled between a supply voltage and a common node. The second transistor is coupled between the common node and a ground voltage. The common node has a reactive voltage. A reactive current flows through the common node. The PWM controller selectively enables and disables the first transistor and the second transistor according to a second control signal and a first transistor control signal. The low-pass filter is coupled between the common node and an output node. The delay controller generates the second control signal according to the reactive voltage.