SI3462

Si3462 SINGLE-PORT IEEE 802.3AT POE/POE+ PSE INTERFACE Features  IEEE 802.3atTM compliant PSE Short-circuit output fault  Autonomous operation requires no protection host processor interface LED status signal (detect,  Complete reference design power good, output fault) available, including Si3462 controller  UNH Interoperability Test Lab and schematic: report available Low-cost BOM  Extended operating range Compact PCB footprint (–40 to +85 °C) Operates directly from a +50 V  11-Pin Quad Flat No-Lead (QFN) isolated supply package Supports up to 30 W maximum Tiny 3x3 mm PCB footprint; output power (Class 4) RoHS-compliant Robust 3-point detection algorithm  No-classify modes force power eliminates false detection events after valid detection IEEE-compliant disconnect Eliminates 10 BOM Inrush current control components Applications  IEEE 802.3at endpoints and midspans  Environment A and B PSEs  Embedded PSEs  Set-top boxes  FTTH media converters  Cable modem and DSL gateways Description The Si3462 is a single-port power management controller for IEEE 802.3atcompliant Power Sourcing Equipment (PSE). The Si3462 can be powered from a 50 V input using a shunt regulator, or, to save power, it can be powered from 50 V and 3.3 V power supplies. The IEEE-required Powered Device (PD) detection feature uses a robust 3-point algorithm to avoid false detection events. The Si3462's reference design kit also provides ful...