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參數(shù)資料
| 型號： | LTC4259AIGW-1#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C |
| 中文描述： | 4-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO36 |
| 封裝： | 0.300 INCH, LEAD FREE, PLASTIC, SSOP-36 |
| 文件頁數(shù)： | 1/32頁 |
| 文件大小： | 416K |
| 代理商： | LTC4259AIGW-1#PBF |
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LTC4259A-1
1
4259a1fa
■ Controls Four Independent – 48V Powered
Ethernet Ports
■ Each LTC4259A-1 Port Includes:
– IEEE 802
.3af Compliant PD Detection and
Classification
– Output Current Limit with Foldback
– Short-Circuit Protection with Fast Gate Pull-Down
– PD Disconnect Using AC or DC Sensing
– Improved AC Disconnect
– Improved UVLO
■ Operates Autonomously or Controlled by I2C
TM
Serial Interface
■ 4-Bit Programmable Digital Address Allows Control
of Up to 64 Ports
■ Current and Duty Cycle Limits Protect External FETs
■ IMPROVED UVLO
■ Available in a 36-pin SSOP package.
Quad IEEE 802.3af
Power over Ethernet Controller
with AC Disconnect
■ IEEE 802.3af Compliant Endpoint and Midspan
Power Sources
■ IP Phone Systems
■ DTE Power Distribution
The LTC
4259A-1 is a quad –48V Hot SwapTM controller
designed for use in IEEE 802.3af compliant Power Sourc-
ing Equipment (PSE). It consists of four independent ports,
each with output current limit, short-circuit protection, com-
plete Powered Device (PD) detection and classification ca-
pability, and programmable PD disconnect using AC or DC
sensing. Used with power MOSFETs and passives as in
Figure 1, the LTC4259A-1 can implement a complete IEEE
802.3af-compliant PSE.
The LTC4259A-1 can operate autonomously or be controlled
by an I2C serial interface. Up to 16 LTC4259A-1s may co-
exist on the same data bus, allowing up to 64 powered
Ethernetportstobecontrolledwithonlytwodigitallines.Fault
conditions are optionally signaled with a programmable INT
pin to eliminate software polling.
External power MOSFETs, current sense resistors and di-
odes allow easy scaling of current and power dissipation
levels and provide protection against voltage and current
spikes and ESD events.
Linear Technology also provides solutions for 802.3af PD
applications with the LTC4257, LTC4257-1 and LTC4267.
Figure 1. Complete 4-Port Powered Ethernet Power Source
DGND
AD3
RS1 TO RS4: 0.5
Q1 TO Q4: IRFM120A
AD2
AD1
AD0
SDAOUT
SDAIN
SCL
DETECT4
DETECT3
DETECT1
DETECT2
AGND
INT
–48V
VEE
SHDN1
SENSE1
RS1
RS2
RS3
RS4
GATE1
Q1
Q2
Q3
Q4
S1B
×4
CMPD3003
×4
10k
1k
×4
0.47
F
100V
×4
X7R
PORT1
PORT2
PORT3
PORT4
4259A F01
SMAJ58A
×4
0.1
F 100V
×4
OUT1 SENSE2 GATE2
LTC4259A-1
OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4
SHDN2 SHDN3 SHDN4
VDD
3.3V
0.1
F
AUTO BYP
OSCIN
RESET
0.1
F
100V X7R
0.1
F
FEATURES
DESCRIPTIO
U
APPLICATIO S
U
TYPICAL APPLICATIO
U
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.
Hot Swap is a registered trademark of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
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PDF描述 |
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| LTC4259AIGW-1#TRPBF | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: SSOP; No of Pins: 36; Temperature Range: -40°C to +85°C |
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| LTC4259CGW-ES | 制造商:LINEAR_TECH 功能描述: |
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| LTC4260CGN | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 80V 24-Pin SSOP N |
| LTC4260CGN#PBF | 功能描述:IC CTLR HOT SWAP I2C 24-SSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:119 系列:- 類型:熱交換控制器 應(yīng)用:通用型，PCI Express? 內(nèi)部開關(guān):無 電流限制:- 電源電壓:3.3V，12V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:80-TQFP 供應(yīng)商設(shè)備封裝:80-TQFP（12x12） 包裝:托盤 產(chǎn)品目錄頁面:1423 (CN2011-ZH PDF) |
| LTC4260CGN#TR | 制造商:Linear Technology 功能描述:Hot Swap Controller 1-CH 80V 24-Pin SSOP N T/R |
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