E-STE08PSP| Datasheet

E-STE08PSP, STE08PSP

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STE08PSP
08-channel high-power integrated PSE line manager
Preliminary Data

Features

Full programmable power sourcing equipment (PSE) power control device Supports up to 8 independent high-power (up to 50 W) channels, no need for external FET Low cost small size TQFP80 14 x14 exposed pad slug down plastic package Wide operating range: up to 90 V Legacy POE+ capable, with double current limitation (Standard 802.3af or POE+) IEEE 802.3at pre-standard compliant Auto EEPROM download for parameter setting Global power management for smart power sharing between different controllers Enhanced integrated system power management algorithm with dynamic power allocation Automatic setting of power budget according to battery level (3 batteries supported) Independent per-port power settings (also runtime configurable) Current sensing with external resistor down to 500 m In-Rush current control, short circuit protection with folding, overload Open circuit detector: AC and DC methods On-chip options 3.3 V SMPS controller 3.3 V linear regulator Low noise 12-bit A to D converter Standard slave I2C interf
ace for communication with host (Primary I2C) Master/slave I2C (Secondary I2C) for intrasystem communication Full support of RFC3621 MIB

TQFP80 exposed pad 14 mm x 14 mm

Contiguous channel power consumption registers for easy I2C reading Parallel monitor interface to ease channel operation monitoring 3-level detection with signature resistance linearity check Customizable signature detection capability with double signature detection distinct windows (IEEE or legacy) Multiple classification attempt (MCA) programmable structure

Applications

Ethernet switches/routers Midspan power supplies IP-PBX

Description
The STE08PSP architecture provides a complete PSE interface and a smart digital controller to efficiently manage all the functions in a high-power POE system (up to 45 W) with port counts up to 64 without any host controller.

January 2008

Rev 1

1/45
www.st.com
45

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.