公开(公告)号：US11496048B2

公开(公告)日：2022-11-08

申请号：US17029927

申请日：2020-09-23

Applicant: DELTA ELECTRONICS, INC.

Inventor： Ming-Wei Chou ,  Sheng-Jian Chen ,  Chia-Chang Hsu ,  Cheng-Yi Lo

IPC: H02M3/156 ,  H03K7/08 ,  H02M3/07 ,  H03K5/00

Abstract: A power supply with duty cycle limiting circuit includes a conversion circuit, a drive circuit, a control unit, and a duty cycle limiting circuit. The duty cycle limiting circuit converts a control signal into a control voltage, and determines whether a power switch of a power supply is turned off according to the control voltage and a threshold voltage to limit a duty cycle of the power switch.

公开(公告)号：US11114890B2

公开(公告)日：2021-09-07

申请号：US16852051

申请日：2020-04-17

Applicant: DELTA ELECTRONICS, INC.

Inventor： Sheng-Jian Chen ,  Chia-Chang Hsu ,  Zong-Jin Chuang

IPC: H02J9/06 ,  H02J7/00 ,  H02H7/20 ,  H02J7/34

Abstract: A DC uninterruptible power supply apparatus with bidirectional protection function receives a DC power source and supplies power to a DC load. The DC uninterruptible power supply apparatus includes a first loop, a second loop, a third loop, and a control unit. The first loop receives the DC power source and supplies power to the DC load. The second loop converts the DC power source into an energy-storing power source to charge an energy-storing unit. The energy-storing unit provides a backup power source to the DC load through the third loop and the first loop. The control unit controls the first loop, the second loop, and the third loop to correspondingly provide a first protection mechanism, a second protection mechanism, and a third protection mechanism.