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LTC4292IUJ#TRPBF

Description
4-PORT IEEE 802.3BT PSE CONTROLL
Categorysemiconductor    Power management   
File Size540KB,4 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric Compare View All

LTC4292IUJ#TRPBF Overview

4-PORT IEEE 802.3BT PSE CONTROLL

LTC4292IUJ#TRPBF Parametric

Parameter NameAttribute value
typeController (PSE)
Number of channels8
Power - Max71.3W
internal switchnone
Supporting rolenone
standard802.3at (PoE+), 802.3af (PoE), 802.3bt
Voltage - Power80V
Current - Power-
Operating temperature-40°C ~ 85°C
Package/casing40-WFQFN Exposed Pad
Supplier device packaging40-QFN(6x6)
LTC4292/LTC4291
4-Port IEEE 802.3bt
PoE PSE Controller
FEATURES
n
n
DESCRIPTION
The
LTC
®
4292/LTC4291
chipset is a 4-port power sourc-
ing equipment (PSE) controller designed for use in IEEE
802.3bt Type 3 and 4 compliant Power over Ethernet
(PoE) systems. The LTC4292/LTC4291 is designed to
power compliant 802.3af, 802.3at, and 802.3bt PDs.
The LTC4292/LTC4291 chipset delivers lowest-in-indus-
try heat dissipation by utilizing low-R
DS(ON)
external
MOSFETs and 0.15Ω sense resistance per power channel.
A transformer-isolated communication protocol replaces
expensive opto-couplers and complex isolated 3.3V sup-
ply, resulting in significant BOM cost savings.
Advanced power management features include per-
port 14-bit current monitoring, programmable current
limit, and versatile fast shut-down of preselected ports.
Advanced power management host software is available
under a no-cost license. PD detection uses a proprietary
multipoint detection mechanism ensuring excellent immu-
nity from false PD identification. Autoclass and 5-event
physical classification are supported. The LTC4292/
LTC4291 includes an I
2
C serial interface operable up to
1MHz. The LTC4292/LTC4291 is pin or I
2
C programmable
to negotiate PD delivered power up to 71.3W.
All registered trademarks and trademarks are the property of their respective owners.
n
n
n
n
n
n
n
Four PSE Ports
n
Two Power Channels Per Port
Fully Compliant IEEE 802.3bt Type 3 and 4 PSE
n
Compliant Support for Type 1, 2, 3, and 4 PDs
Low Power Path Dissipation per Channel
n
150mΩ Sense Resistance
n
30mΩ or Lower MOSFET R
DS(ON)
Chipset Provides Electrical Isolation
n
Eliminates Optos and Isolated 3.3V Supply
Very High Reliability Multipoint PD Detection
n
Connection Check Distinguishes Single-
Signature and Dual-Signature PDs
Continuous, Dedicated Per-Port Power and Current
Monitoring
n
Per-Port Power Policing
1MHz I
2
C Compatible Serial Control Interface
Pin or I
2
C Programmable PD Power Up to 71.3W
Available in a 40-Lead 6mm × 6mm (LTC4292) and
24-Lead 4mm × 4mm (LTC4291) QFN Package
APPLICATIONS
n
n
PoE PSE Switches/Routers
PoE PSE Midspans
TYPICAL APPLICATION
10
0.1µF
3.3V
V
EE
ISOLATION
CPD
100
3.3V
100
CND
LTC4291
DPD
100
3.3V
100
DND
1µF
DGND
CAP1
2nF
2kV
0.1µF
CAP2
V
EE
V
EE
100
V
EE
100
DNA
100
V
EE
100
CNA
DPA
LTC4292
OUTnB
7
GATEnB
SENSEnB
VSSKn
0.22 F 100V
,
0.15Ω
AGNDP
VSSKn
S1B
0.15
VSSKn
V
EE
1000BASE-T
(1 OF 4 PORTS)
TX4
8
RJ45
429291
TA01a
AGNDP
1µF
100V
AGNDP
OUTnA
GATEnA
SENSEnA
AGNDP
0.22µF
100V
S1B
1
AGNDP
0.22µF
100V
S1B
TX1
2
3
S1B
0.15
VSSKn
V
EE
TX2
6
4
TX3
5
>47µF
GP0
GP1
4PVALID
(NO I
2
C
ISOLATION
REQUIRED)
AUTO
RESET
MSD
INT
SCL
SDAIN
SDAOUT
AD0
AD1
AD2
AD3
V
DD
PWRMD0
PWRMD1
CPA
Rev 0
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Description 4-PORT IEEE 802.3BT PSE CONTROLL 4-PORT IEEE 802.3BT PSE CONTROLL 4-PORT IEEE 802.3BT PSE CONTROLL 4-PORT IEEE 802.3BT PSE CONTROLL
type Controller (PSE) Controller (PSE) Controller (PSE) Controller (PSE)
Number of channels 8 8 8 8
Power - Max 71.3W 71.3W 71.3W 71.3W
internal switch none none none none
Supporting role none none none none
standard 802.3at (PoE+), 802.3af (PoE), 802.3bt 802.3at (PoE+), 802.3af (PoE), 802.3bt 802.3at (PoE+), 802.3af (PoE), 802.3bt 802.3at (PoE+), 802.3af (PoE), 802.3bt
Voltage - Power 80V 80V 3.6 V ~ 12 V 3.6 V ~ 12 V
Operating temperature -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C -40°C ~ 85°C
Package/casing 40-WFQFN Exposed Pad 40-WFQFN Exposed Pad 24-WFQFN Exposed Pad 24-WFQFN Exposed Pad
Supplier device packaging 40-QFN(6x6) 40-QFN(6x6) 24-QFN(4x4) 24-QFN(4x4)
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