SI3452 Datasheet, PDF(1/36 Page) Silicon Laboratories – QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE+ PSES

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SI3452 Datasheet, PDF (1/36 Pages) Silicon Laboratories – QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND POE+ PSES

Si3452/53

QUAD HIGH-VOLTAGE PORT CONTROLLER FOR POE AND

POE+ PSES

Features

ï® Each Si3452/3 high-voltage port ï® Programmable architecture supports

controller supports four PSE power IEEE 802.3af (PoE) and IEEE

interfaces

802.3at (PoE+) PSEs

ï® Programmable current limits for PoE ï¬ï Programmable current limits for

(15.4 W), PoE+ (30 W), and

PoE (350 mA) and PoE+

proprietary systems (up to 40 W) per

(600 mA), and custom limits to

port

850 mA

ï® I2C interface requires no external

ï¬ï Per-port current and voltage

MCU for easy, low-cost management

monitoring for sophisticated power

of 4 to 48 ports by the host system

management and control

ï® Unique mixed-signal IC high-voltage ï¬ï Power policing mode

component integration simplifies

ï¬ï Robust multi-point detection

design, lowers power dissipation,

ï¬ï Supports 1-Event and 2-Event

minimizes external BOM, and

classification algorithms

reduces PCB footprint

ï® Comprehensive, robust, fault-

ï¬ï Internal low-RON power FETs with

current-sense circuitry

ï¬ï Integrated transient voltage surge

suppressors

protection circuitry

ï¬ï Supply under-voltage lockout

(UVLO)

ï¬ï Output current limit and short-

ï¬ï DC disconnect (Si3453) or

proprietary dV/dt disconnect

(Si3452) sensing methods

circuit protection

ï¬ï Foldback current limiting

ï¬ï Dual-threshold thermal overload

protection

ï¬ï Fault source reporting for

intelligent port management

ï® Extended commercial (â10 to 85 Â°C)

and industrial (â40 to 85 Â°C)

operating temperatures

ï® Compact, 6Ã6 mm2, 40-pin QFN

RoHS-compliant package

Applications

ï® Power over Ethernet Endpoint

ï® Industrial automation systems

switches and Midspans for IEEE Std ï® Networked audio

802.3af and 802.3at

ï® IP Phone Systems and iPBXs

ï® Supports high power PDs, such as: ï® Metropolitan area networked WAPs,

ï¬ï Pan/Tilt/Zoom security cameras

cameras, and sensors

ï¬ï 802.11n WAPs

ï® WiMAX ASN/BTS and CPE/ODU

ï¬ï Multi-band, multi-radio WAPs

systems

ï® Security and RFID systems

Ordering Information:

See page 30.

Pin Assignments

40-pin QFN

VEE1 1

VEE 2

VREF 3

AIN 4

AOUT 5

AGND 6

RBIAS 7

AGND 8

NC 9

VEE4 10

Si3452

(Top View)

30 VDD

29 DGND

28 AD0

27 AD1

26 AD2

25 AD2

24 AD3

23 RST

22 VEE3

21 AD3

See "9. Pin Descriptions" on page 27.

Rev. 1.0 4/10

Si3452/3

▷