Powered device controllers having shared connection interfaces and two-level inrush current limit

摘要

A system for controlling the operation of isolation transistors in high power Power over Ethernet (PoE) networks to achieve greater power delivery to a load is disclosed. In one or more implementations, the system includes a first power over Ethernet (PoE) powered device controller configured to control power supply to a load, and a second PoE powered device controller coupled to the load and to the first PoE powered device controller. The second PoE powered device controller is connected to the first PoE powered device controller using a shared connection interface and is configured to control power supply to the load. The shared connection interface is configured to synchronize the first PoE powered device controller and the second PoE powered device controller to deliver power at least substantially contemporaneously to the load.

主权项

1. A system, comprising:
a first Power over Ethernet (PoE) powered device controller configured to control power supply to a load, the first power over Ethernet (PoE) powered device controller coupled to a first isolation field effect transistor; a second Power over Ethernet (PoE) powered device controller coupled to the load and to the first PoE powered device controller, the second PoE powered device controller coupled to the first PoE powered device controller using a shared connection interface, the second PoE powered device controller configured to control power supplied to the load, the second Power over Ethernet (PoE) powered device controller configured to supply current to the load at a programmable inrush current limit, the second power over Ethernet (PoE) powered device controller coupled to a second isolation field effect transistor, the current implemented using a fixed timer to cause at least one of the first isolation field effect transistor or the second isolation field effect transistor to operate in a safe operating area (SOA), wherein the shared connection interface is configured to synchronize the first PoE powered device controller and the second PoE powered device controller to deliver power at least substantially contemporaneously to the load, the shared connection interface includes internal synchronization in each powered device controller, the internal synchronization includes a synchronized pin shared between each powered device controller.