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LTC4274AIUHF-4#PBF

更新时间： 2024-11-09 14:52:47
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
30页 324K
描述
LTC4274A/LTC4274C - Single PoE/PoE+/LTPoE++ PSE Controller; Package: QFN; Pins: 38; Temperature Range: -40°C to 85°C

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LTC4274AIUHF-4#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, LCC38,.2X.28,20
针数：38Reach Compliance Code：compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：4.41可调阈值：YES
模拟集成电路 - 其他类型：POWER SUPPLY MANAGEMENT CIRCUITJESD-30 代码：R-PQCC-N38
JESD-609代码：e3长度：7 mm
湿度敏感等级：1信道数量：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
封装等效代码：LCC38,.2X.28,20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）：NOT SPECIFIED
电源：3.3,54 V认证状态：Not Qualified
座面最大高度：0.8 mm子类别：Power Management Circuits
最大供电电流 (Isup)：5 mA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

LTC4274AIUHF-4#PBF 数据手册

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LTC4274A/LTC4274C  
++  
+
Single PoE/PoE /LTPoE  
PSE Controller  
FEATURES  
DESCRIPTION  
n
Compliant with IEEE 802.3at Type 1 and 2  
The LTC®4274A is a single Power Sourcing Equipment  
n
++  
(PSE)controllercapableofdeliveringupto90WofLTPoE  
Low Power Dissipation  
++  
n
power to a compatible LTPoE Powered Device (PD). A  
0.25Ω Sense Resistance Per Channel  
n
proprietarydetection/classificationschemeallowsmutual  
Very High Reliability 4-Point PD Detection  
++  
++  
n
identification between a LTPoE PSE and LTPoE PD  
whileremainingcompatibleandinteroperablewithexisting  
Type 1 (13W) and Type 2 (25.5W) PDs. The LTC4274A  
feature set is a superset of the popular LTC4274. These  
2-Point Forced Voltage  
2-Point Forced Current  
n
n
n
n
n
n
High Capacitance Legacy Device Detection  
2
1MHz I C Compatible Serial Control Interface  
PSE controllers feature low-R external MOSFETs and  
ON  
Midspan Backoff Timer  
0.25Ω sense resistors which are especially important at  
Supports 2-Pair and 4-Pair Output Power  
++  
theLTPoE currentlevelstomaintainthelowestpossible  
Available in Multiple Power Grades  
heat dissipation.  
n
++  
LTC4274A-1: LTPoE ™ 38.7W  
n
n
n
n
++  
LTC4274A-2: LTPoE 52.7W  
TheLTC4274CtargetsfullyautomaticPSEsystemspower-  
ing Type 1 (up to 13W) PDs.  
++  
LTC4274A-3: LTPoE 70W  
++  
LTC4274A-4: LTPoE 90W  
Advanced power management features include: a 14-bit  
currentmonitoringADC,DAC-programmablecurrentlimit,  
and versatile quick port shutdown. PD Discovery uses  
a proprietary dual-mode 4-point detection mechanism  
ensuring excellent immunity from false PD detection.  
The LTC4274A/LTC4274C includes an I C serial interface  
operable up to 1MHz.  
LTC4274C: PoE 13W  
n
Available in 38-Lead 5mm × 7mm QFN Package  
APPLICATIONS  
2
n
++  
LTPoE PSE Switches/Routers  
n
n
n
++  
LTPoE PSE Midspans  
IEEE 802.3at Type 1 PSE Switches/Routers  
IEEE 802.3at Type 1 PSE Midspans  
The LTC4274A/LTC4274C is available in multiple power  
grades, allowing delivered PD power of 13W, 25.5W,  
38.7W, 52.7W, 70W and 90W. Thesecontrollers are avail-  
able in a 38-lead 5mm × 7mm QFN package.  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and  
++  
LTPoE are trademarks of Analog Devices, Inc. All other trademarks are the property of their  
respective owners.  
TYPICAL APPLICATION  
Complete Single-Port 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  
LTC4274AC  
10Ω  
V
SENSE GATE OUT  
EE  
SMAJ58A  
1µF  
C
BULK  
–54V  
0.22µF  
100V  
100V  
S1B  
S1B  
TVS  
BULK  
PORT  
4274AC TA01  
–54V  
4274acfe  
1
For more information www.linear.com/LTC4274A  
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