公开(公告)号：WO2017046657A1

公开(公告)日：2017-03-23

申请号：PCT/IB2016/051655

申请日：2016-03-23

Applicant: STMICROELECTRONICS S.R.L.

Inventor： AGNES, Andrea ,  BEIA, Christian

IPC: H04L12/10 ,  H04L12/40 ,  G06F1/26 ,  G05F3/24

CPC classification number: H02M7/06 ,  G05F3/24 ,  G06F1/266 ,  H02M3/07 ,  H02M7/217 ,  H04L12/10 ,  H04L12/40045

Abstract: An electronic device includes a rectifier bridge (130) that includes an input configured to be coupled to power over Ethernet (PoE) power sourcing equipment (PSE), and an output. A transistor (140) is configured to selectively couple the output with a load. The electronic device includes a maintain power signature (MPS) device (170), and a control circuit (180). The control circuit is to maintain the transistor on when a load current is above a threshold, source current from the rectifier bridge to the MPS device when the load current is below the threshold, and switch the transistor to a diode configuration when the load current is below the threshold.

Abstract translation: 电子设备包括整流器桥（130），其包括被配置为耦合到以太网供电（PoE）电源设备（PSE））的输入端和输出端。 晶体管（140）被配置为选择性地将输出与负载耦合。 电子设备包括维护功率签名（MPS）设备（170）和控制电路（180）。 当负载电流低于阈值时，控制电路将保持晶体管导通，当负载电流高于阈值时，源电流从整流桥到MPS器件，当负载电流为负载电流时，将晶体管切换到二极管配置 低于门槛。