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LTC4274IUHF#PBF

更新时间： 2024-02-06 17:45:05
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
28页 388K
描述
LTC4274 - Single IEEE 802.3at Power Over Ethernet Controller; Package: QFN; Pins: 38; Temperature Range: -40°C to 85°C

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LTC4274IUHF#PBF 技术参数

是否Rohs认证： 符合生命周期：Transferred
零件包装代码：QFN包装说明：HVQCCN,
针数：38Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：8.34模拟集成电路 - 其他类型：ANALOG CIRCUIT
JESD-30 代码：R-PQCC-N38JESD-609代码：e3
长度：7 mm湿度敏感等级：1
功能数量：1端子数量：38
最高工作温度：85 °C最低工作温度：-40 °C
封装主体材料：PLASTIC/EPOXY封装代码：HVQCCN
封装形状：RECTANGULAR封装形式：CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：0.8 mm最大供电电压 (Vsup)：4.3 V
最小供电电压 (Vsup)：3 V标称供电电压 (Vsup)：3.3 V
表面贴装：YES技术：CMOS
温度等级：INDUSTRIAL端子面层：Matte Tin (Sn)
端子形式：NO LEAD端子节距：0.5 mm
端子位置：QUAD处于峰值回流温度下的最长时间：NOT SPECIFIED
宽度：5 mmBase Number Matches：1

LTC4274IUHF#PBF 数据手册

 浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第2页浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第3页浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第4页浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第5页浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第6页浏览型号LTC4274IUHF#PBF的Datasheet PDF文件第7页 
LTC4274  
+
Single PoE PSE Controller  
FeAtures  
Description  
n
Compliant with IEEE 802.3at Type 1 and 2  
The LTC®4274 is a single power sourcing equipment con-  
troller designed for use in IEEE 802.3 Type 1 and Type 2  
(high power) compliant Power over Ethernet systems.  
External power MOSFETs enhance system reliability and  
minimizechannelresistance,cuttingpowerdissipationand  
eliminating the need for heatsinks even at Type 2 power  
levels. External power components also allow use at very  
high power levels while remaining otherwise compatible  
withtheIEEEstandard. 80V-ratedportpinsproviderobust  
protection against external faults.  
n
0.34Ω Total Channel Resistance  
n
130mW/Port at 600mA  
n
Advanced Power Management  
n
8-Bit Programmable Current Limit (I  
)
LIM  
n
n
n
n
7-Bit Programmable Overload Currents (I  
)
CUT  
Fast Shutdown  
14.5-Bit Port Current/Voltage Monitoring  
2-Event Classification  
n
Very High Reliability 4-Point PD Detection  
n
2-Point Forced Voltage  
2-Point Forced Current  
The LTC4274 includes advanced power management  
features, including current and voltage readback and pro-  
n
n
n
n
n
n
n
High Capacitance Legacy Device Detection  
grammable I  
and I thresholds. Available C libraries  
CUT  
LIM  
LTC4259A-1 and LTC4266 SW Compatible  
simplifysoftwaredevelopment;anoptionalAUTOpinmode  
provides fully IEEE-compliant standalone operation with  
no software required. Proprietary 4-point PD detection  
circuitry minimizes false PD detection while supporting  
legacy phone operation. Midspan operation is supported  
with built-in 2-event classification and backoff timing.  
2
1MHz I C Compatible Serial Control Interface  
Midspan Backoff Timer  
Supports Proprietary Power Levels Above 25W  
Available in 38-Pin 5mm × 7mm QFN Package  
2
ApplicAtions  
Host communication is via a 1MHz I C serial interface.  
n
PSE Switches/Routers  
PSE Midspans  
The LTC4274 is available in a 5mm × 7mm QFN package  
that significantly reduces board space compared with  
competing solutions.  
n
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
++  
ThinSOT and LTPoE are trademarks of Analog Devices, Inc. All other trademarks are the  
property of their respective owners.  
typicAl ApplicAtion  
Complete Ethernet High Power Source  
10Ω  
AD0 AD1 AD2 AD3  
SCL SDAIN SDAOUT INT  
3.3V  
V
DD  
AUTO  
MSD  
RESET  
MID  
SHDN  
0.1µF  
SMAJ5.0A  
10µF  
+
+
DGND  
AGND  
LTC4274  
10Ω  
V
EE  
SENSE GATE OUT  
SMAJ58A  
1µF  
C
BULK  
0.22µF  
100V  
100V  
S1B  
S1B  
TVS  
BULK  
PORT  
–54V  
4274 TA01  
–54V  
4274ff  
1
For more information www.linear.com/LTC4274  
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