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SI3461 Datasheet Preview

SI3461 Datasheet

SINGLE-PORT IEEE 802.3AT POE/POE PSE INTERFACE

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Si3461
SINGLE-PORT IEEE 802.3AT POE/POE+ PSE INTERFACE
Features
IEEE 802.3atTM compliant PSE
Autonomous operation requires
no host processor interface
IEEE-compliant disconnect
Inrush current control
Short-circuit output fault
protection
Complete reference design
LED status signal (detect,
available, including Si3461
power good, output fault)
controller and schematic:
UNH Interoperability Test Lab
Low-cost BOM
report available
Compact PCB footprint
Operates directly from a +50 V
isolated supply
Supports up to 30 W maximum
output power (Class 4)
Robust 3-point detection algorithm
eliminates false detection events
Extended operating range
(–40 to +85 °C)
11-Pin Quad Flat No-Lead
(QFN) package
Tiny 3x3 mm PCB footprint;
RoHS-compliant
Applications
Pin Assignments
Si3461
CLSMARK 1
DC1 2
VDD 3
DC2 4
CLSMODE 5
GND
10 STATUS
9 ISENSE
8 RST
7 VSENSE
6 DETA
11-pin QFN (3x3 mm)
Top View—Pads on bottom of package
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 Si3461 is a single-port power management controller for IEEE
802.3at-compliant Power Sourcing Equipment (PSE). The Si3461 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 Si3461's
reference design kit also provides full IEEE-compliant classification
and PD disconnect. Intelligent protection circuitry includes input under-
voltage lockout (UVLO), classification-based current limiting, and
output short-circuit protection. The Si3461 is designed to operate
completely independently of host processor control. An LED status
signal is provided to indicate the port status, including detection,
power good, and output fault event information. The Si3461 is pin-
programmable to support four available power levels, endpoint and
mid-span applications, and auto-retry or restart after disconnect
functions. A comprehensive reference design kit is available (Si3461-
EVB), including a complete schematic and bill of materials.
Rev. 1.0 5/10
Copyright © 2010 by Silicon Laboratories
Si3461
Datasheet pdf - http://www.DataSheet4U.net/




Silicon Laboratories

SI3461 Datasheet Preview

SI3461 Datasheet

SINGLE-PORT IEEE 802.3AT POE/POE PSE INTERFACE

No Preview Available !

www.DataSheet.co.kr
Si3461
2 Rev. 1.0
Datasheet pdf - http://www.DataSheet4U.net/


Part Number SI3461
Description SINGLE-PORT IEEE 802.3AT POE/POE PSE INTERFACE
Maker Silicon Laboratories
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SI3461 Datasheet PDF






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