公开(公告)号：US10608527B2

公开(公告)日：2020-03-31

申请号：US15995151

申请日：2018-06-01

Applicant: I-SHOU UNIVERSITY

Inventor： Chun-An Cheng ,  Er-Yun Chang ,  Chin-Chih Lai ,  Man-Tang Chang

IPC: H02M1/42 ,  H05B33/08 ,  H02M1/34 ,  H02M1/14 ,  H02M3/335

Abstract: A power supply apparatus for driving a light emitting apparatus is provided. The power supply apparatus includes a lossless snubber circuit and a power converting circuit. The lossless snubber circuit has a first diode, a first inductor and a second diode coupled in series between an input end and a first reference end, and has a first capacitor coupled between the first diode and a second reference end. The power converting circuit has a switch, a transformer and a second indictor. The switch is coupled between the first and second reference ends, and is turned on or off according to a control signal. The second inductor is coupled to a first side of the transformer in parallel.