公开(公告)号：US20250023382A1

公开(公告)日：2025-01-16

申请号：US18404554

申请日：2024-01-04

Applicant: MICROCHIP TECHNOLOGY INCORPORATED

Inventor： Arkadiy Peker ,  Yair Darshan ,  Miguel Jacubovski

IPC: H02J9/06 ,  H02M3/04

Abstract: A powered device (PD) interface controller is provided that includes a switch and control circuitry. The switch controls current to a PD from a power sourcing equipment (PSE). The PD accepts power from a network cable over which data is carried, and the PSE provides the power to the network cable. The PD also accepts power from an auxiliary power source. The control circuitry detects a change-over from the auxiliary power source to the PSE as a source of power. The control circuitry turns on the switch to control the current to a short circuit current limit level, greater than a startup inrush current limit of the PD, for a period of time less than a short circuit time limit, to charge a bulk capacitor of the PD. The control circuitry turns on the switch fully to allow the current to flow towards the PD.