公开(公告)号：US10014779B2

公开(公告)日：2018-07-03

申请号：US15367161

申请日：2016-12-01

Applicant: ASUSTeK COMPUTER INC.

Inventor： Hao-Chien Cheng ,  Ching-Fu Cheng ,  Hsiao-Wen Chen

IPC: G05F1/00 ,  H02M3/158 ,  H02M1/32

CPC classification number: H02M3/1584 ,  H02M1/32 ,  H02M3/1588 ,  Y02B70/1466

Abstract: A power supply device includes a power supply module, a voltage regulator module and an over-voltage protection (OVP) module. The power supply module is utilized to provide a standby voltage signal. The voltage regulator module includes a phase modulator circuit. The phase modulator circuit includes a high-side power transistor, a low-side power transistor and a phase inductor. The OVP module is utilized to transmit the standby voltage signal to the phase modulator circuit and detect a detection potential on the phase modulator circuit. The OVP module selectively conducts the low-side power transistor of the phase modulator circuit according to the detection potential.