公开(公告)号：US10720855B2

公开(公告)日：2020-07-21

申请号：US15801312

申请日：2017-11-01

Applicant: DELTA ELECTRONICS, INC.

Inventor： Te-Chih Peng ,  Wei-Chih Hung ,  Min-Cheng Chiang

IPC: H02M7/219 ,  H02M1/32 ,  H02M3/335 ,  H02M1/00

Abstract: A power supply includes a transformer winding, a switching circuit, a controller and a filter circuit. The transformer winding is configured to provide a first voltage. The switching circuit is coupled to the transformer winding and includes a first and a second switching unit. On the condition that the power supply is operated under a standby mode, the controller controls the first and the second switching units to provide a discharging path between two terminals of the transformer winding. On the condition that the power supply is operated under an operating mode, the controller controls the switching circuit such that the switching circuit provides a second voltage according to the first voltage. The filter circuit is coupled to the switching circuit and configured to filter the second voltage to provide an output voltage.

公开(公告)号：US10566891B2

公开(公告)日：2020-02-18

申请号：US16262887

申请日：2019-01-30

Applicant: DELTA ELECTRONICS, INC.

Inventor： Wei-Chih Hung ,  Yen-Wei Lin ,  Yung-Chin Wang ,  Min-Cheng Chiang ,  Te-Chih Peng

IPC: H02M3/335 ,  H02M1/08 ,  H02M3/156 ,  G06F1/26 ,  H02M1/00

Abstract: A power supply device includes a voltage converting circuit and a mode switching circuit. The voltage converting circuit is configured to receive a first voltage and convert the first voltage to a second voltage. The mode switching circuit is configured to provide an output voltage and an output current to a load according to the second voltage. The mode switching circuit includes a switch configured to maintain on or off on the condition that the power supply device is operated under a constant voltage output mode such that the value of the output voltage corresponds to the second voltage, and the switch is configured to switch between on and off on the condition that the power supply device is operated under a constant current output mode such that the output current of the mode switching circuit is a constant value.