- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄11595 > LTC4278IDKD#PBF (Linear Technology)IC PD IEEE 802.3AT 25.5W 32-DFN PDF資料下載
參數(shù)資料
| 型號： | LTC4278IDKD#PBF |
| 廠商： | Linear Technology |
| 文件頁數(shù)： | 1/42頁 |
| 文件大小： | 0K |
| 描述： | IC PD IEEE 802.3AT 25.5W 32-DFN |
| 產(chǎn)品培訓(xùn)模塊： | Power over Ethernet |
| 標準包裝： | 52 |
| 控制器類型： | 供電設(shè)備接口控制器（PD） |
| 接口： | IEEE 802.3af |
| 電源電壓： | 4.5 V ~ 20 V |
| 電流 - 電源： | 6.4mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 32-WFDFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 32-DFN（7x4）裸露焊盤 |
| 包裝： | 管件 |
| 產(chǎn)品目錄頁面： | 1338 (CN2011-ZH PDF) |
當(dāng)前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁
LTC4278
1
4278fc
12m
1F
30.9
24k
1.8k
38.3k
100k
12k
0.1F
33pF
0.1F
2.2nF
1F
tON
SYNC
PGDLY
UVLO PWRGD
SENSE–
VCMP
SENSE+
RCMP
VNEG
RCLASS
SHDN
VPORTP
VPORTN
ENDLY
OSC
LTC4278
GND
FB
VCC
SG
PG
CCMP
TO MICRO
CONTROLLER
47F
0.18H
5V
4.5A
100F
+
3.01k
21.5k
T2P
46.4k
294k
10F
8.2H
EPC3472G-LF
FDMS2572
HAT2169
54V FROM
DATA PAIR
AUXILIARY
SUPPLY
(10V TO 57V)
54V FROM
SPARE PAIR
+
–
+
–
~
4278 TA01a
BSS63
PDS5100H
B1100
+
–
~
TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
IEEE 802.3at PD with
Synchronous No-Opto Flyback
Controller and 12V Aux Support
The LTC4278 is an integrated Powered Device (PD) con-
troller and switching regulator intended for high power
IEEE 802.3at and 802.3af applications. With a wide input
voltage range, the LTC4278 is specifically designed to sup-
port PD applications that include a low-voltage auxiliary
power input such as a 12V wall adaptor. The inclusion of
a shutdown pin provides simple implementation of both
PoE and auxiliary dominate applications. In addition, the
LTC4278supportsboth1-eventand2-eventclassifications
as defined by the IEEE, thereby allowing the use in a wide
range of product configurations.
TheLTC4278synchronous,currentmode,flybackcontrol-
ler generates multiple supply rails in a single conversion
stepprovidingforthehighestsystemefficiencywhilemain-
taining tight regulation across all outputs. The LTC4278
includes Linear Technology’s patented No-Opto feedback
topology to provide full IEEE 802.3 isolation without the
need of an opto-isolator circuit. A true soft-start function
allows graceful ramp-up of all output voltages.
The LTC4278 is available in a space saving 32-lead DFN
package.
n
25.5W IEEE 802.3at Compliant (Type 2) PD
n
10V to 57V Auxiliary Power Input
n
Shutdown Pin for Flexible Auxiliary Power Support
n
Integrated State-of-the-Art No-Opto Synchronous
Flyback Controller
– Isolated Power Supply Efficiency >92%
– 88% Efficiency Including Diode Bridge and
Hot Swap FET
n
Superior EMI Performance
n
Robust 100V 0.7Ω (Typ) Integrated Hot Swap MOSFET
n
IEEE 802.3at
High Power Available Indicator
n
Integrated Signature Resistor and Programmable
Class Current
n
Undervoltage, Overvoltage and Thermal Protection
n
Short-Circuit Protection with Auto-Restart
n
Programmable Soft-Start and Switching Frequency
n
Complementary Power Good Indicators
n
Thermally Enhanced 7mm × 4mm DFN Package
n
VoIP Phones with Advanced Display Options
n
Dual-Radio Wireless Access Points
n
PTZ Security Cameras
n
RFID Readers
n
Industrial Controls
25W PD Solution with 12V Auxiliary
L
, LT, LTC, LTM, Linear Technology, SwitcherCAD and the Linear logo are registered
trademarks and Hot Swap and ThinSOT are trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners. Protected by U.S. Patents,
including 5841643.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| KSZ8873MML | IC ETHERNET SWITCH 3PORT 64-LQFP |
| V72A3V3C264BG2 | CONVERTER MOD DC/DC 3.3V 264W |
| V72A3V3C264BG | CONVERTER MOD DC/DC 3.3V 264W |
| V72A3V3C264BF3 | CONVERTER MOD DC/DC 3.3V 264W |
| KSZ8851-16MLLI | IC MAC CTLR 1PORT W/BUS 48-TQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4278IDKDTRPBF | 制造商:LINER 制造商全稱:Linear Technology 功能描述:IEEE 802.3at PD with Synchronous No-Opto Flyback Controller and 12V Aux Support |
| LTC4280 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Hot Swap Controller with I2C Compatible Monitoring |
| LTC4280CUFD | 制造商:LINER 制造商全稱:Linear Technology 功能描述:Hot Swap Controller with I2C Compatible Monitoring |
| LTC4280CUFD#PBF | 功能描述:IC CONTROLLER HOT SWAP QFN-24 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 標準包裝: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) |
| LTC4280CUFD#TRPBF | 功能描述:IC CTLR HOT SWAP I2C MON 24QFN 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 標準包裝: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) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。