- 您现在的位置：买卖IC网 > PDF目录80116 > LTC4266CGW#TRPBF (LINEAR TECHNOLOGY CORP) POWER SUPPLY MANAGEMENT CKT, PDSO36 PDF资料下载
参数资料
| 型号： | LTC4266CGW#TRPBF |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 电源管理 |
| 英文描述： | POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, SSOP-36 |
| 文件页数： | 8/30页 |
| 文件大小： | 414K |
| 代理商： | LTC4266CGW#TRPBF |
第1页第2页第3页第4页第5页第6页第7页当前第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
LTC4266
4266fa
operAtion
morepowerthatthePSEhasavailable.Theclassification
stepisoptional;ifaPSEchoosesnottoclassifyaPD,it
mustassumethatthePDisa13W(full802.3afpower)
device.
Newin802.3at
Thenewer802.3atstandardsupersedes802.3afandbrings
severalnewfeatures:
APDmaydrawasmuchas25.5W.SuchPDs(andthe
PSEsthatsupportthem)areknownasType2.Older
13W802.3afequipmentisclassifiedasType1.Type1
PDswillworkwithallPSEs;Type2PDsmayrequire
Type2PSEstoworkproperly.TheLTC4266isdesigned
toworkinbothType1andType2PSEdesigns,and
alsosupportsnon-standardconfigurationsathigher
powerlevels.
TheClassificationprotocolisexpandedtoallowType2
PSEstodetectType2PDs,andtoallowType2PDsto
determineiftheyareconnectedtoaType2PSE.Two
versionsofthenewClassificationprotocolareavail-
able:anexpandedversionofthe802.3afClassPulse
protocol,andanalternatemethodintegratedwiththe
existingLLDPprotocol(usingtheEthernetdatapath).
TheLTC4266fullysupportsthenewClassPulseprotocol
andisalsocompatiblewiththeLLDPprotocol(which
isimplementedinthedatacommunicationslayer,not
inthePoEcircuitry).
Faultprotectioncurrentlevelsandtimingareadjusted
toreducepeakpowerintheMOSFETduringafault;
thisallowsthenew25.5Wpowerlevelstobereached
usingthesameMOSFETsasolder13Wdesigns.
BACKWARDSCOMPATIBILITY
TheLTC4266isdesignedtobebackwardcompatiblewith
earlierPSEchipsinbothsoftwareandpinfunctions.Exist-
ingsystemsusingeithertheLTC4258orLTC4259A(or
compatible)devicescanbesubstitutedwiththeLTC4266
withoutsoftwareorPCBlayoutchanges;onlyminorBOM
changes are required to implement a fully compliant
802.3atdesign.
Becauseofthebackwardscompatibilityfeatures,someof
theinternalregistersareredundantorunusedwhenthe
LTC4266isoperatedasrecommended.Formoredetails
onusageincompatibilitymode,refertotheLTC4258/
LTC4259Adevicedatasheets.
SpecialCompatibilityModeNotes
The LTC4266 can use either 0.5Ω or 0.25Ω sense
resistors,whiletheLTC425xchipsalwaysused0.5Ω.
Tomaintaincompatibility,iftheAUTOpinislowwhen
theLTC4266powersupitassumesthesenseresistor
is0.5Ω;ifitishighatpowerup,theLTC4266assumes
0.25Ω.Theresistorvaluesettingcanbereconfigured
atanytimeafterpowerup.Inparticular,systemsthat
use0.25ΩsenseresistorsandhaveAUTOtiedlow
mustreconfiguretheresistorsettingsafterpowerup.
TheLTC4259AincludedbothACandDCdisconnect
sensingcircuitry,buttheLTC4266hasonlyDCdiscon-
nect sensing. For the sake of compatibility, register
bitsusedtoenableACdisconnectintheLTC4259Aare
implementedintheLTC4266,buttheysimplymirror
thebitsusedforDCdisconnect.
The LTC4258 and LTC4259A required 10k resistors
betweentheOUTnpinsandthedrainsoftheexternal
MOSFETs.Theseresistorsmustbeshortedorreplaced
withzeroohmjumperswhenusingtheLTC4266.
TheLTC4258andLTC4259AincludedaBYPpin,de-
coupledtoAGNDwith0.1F.ThispinchangestotheMID
pinontheLTC4266.Thecapacitorshouldberemoved
forEndspanapplications,orreplacedwithazeroohm
jumperforMidspanapplications.
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4266IGW#PBF | POWER SUPPLY MANAGEMENT CKT, PDSO36 |
| LS4301-7EPD9T | 1-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LS5540-7EPD4T | 2-OUTPUT 100 W AC-DC PWR FACTOR CORR MODULE |
| LT1740-7PDGB1 | 1-OUTPUT AC-DC REG PWR SUPPLY MODULE |
| LSN-2.5/10-D12BJ | 1-OUTPUT DC-DC REG PWR SUPPLY MODULE |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4266CIUHF#PBF | 功能描述:IC CONTROLLER PSE QUAD 38-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4266CIUHF#TRPBF | 功能描述:IC CONTROLLER PSE QUAD 38-QFN RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
| LTC4266CUHF#PBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP 制造商:Linear Technology 功能描述:IC POE CONTROLLER 3.3V QFN-38 制造商:Linear Technology 功能描述:IC, POE CONTROLLER, 3.3V, QFN-38; Input Voltage:3.3V; Supply Current:-2.4mA; UVLO:25V; Digital IC Case Style:QFN; No. of Pins:38; Frequency:1MHz; Operating Temperature Min:0C; Operating Temperature Max:70C; MSL:MSL 1 - Unlimited ;RoHS Compliant: Yes |
| LTC4266CUHF#TRPBF | 制造商:Linear Technology 功能描述:POE Controller 25.5W 38-Pin QFN EP |
| LTC4266IGW#PBF | 功能描述:IC CTRLR IEEE 802.3AT 36-SSOP RoHS:是 类别:集成电路 (IC) >> 接口 - 控制器 系列:- 标准包装:2,450 系列:- 控制器类型:SPI 总线至 I²C 总线桥接 接口:I²C，串行，SPI 电源电压:2.4 V ~ 3.6 V 电流 - 电源:11mA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:24-VFQFN 裸露焊盘 供应商设备封装:24-HVQFN（4x4） 包装:托盘 配用:568-3511-ND - DEMO BOARD SPI TO I2C 其它名称:935286452157SC18IS600IBSSC18IS600IBS-ND |
发布紧急采购，3分钟左右您将得到回复。