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LTC4270/ PDF预览

LTC4270/

更新时间: 2024-01-29 01:22:55
品牌 Logo 应用领域
凌特 - Linear 控制器
页数 文件大小 规格书
32页 336K
描述
8-Port PoE/PoE PSE Controller

LTC4270/ 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, LCC52,.27X.31,20
针数:52Reach Compliance Code:compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:4.27模拟集成电路 - 其他类型:ANALOG CIRCUIT
JESD-30 代码:R-PQCC-N52JESD-609代码:e3
长度:8 mm湿度敏感等级:1
功能数量:1端子数量:52
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:LCC52,.27X.31,20封装形状:RECTANGULAR
封装形式:CHIP CARRIER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):15 mA最大供电电压 (Vsup):3.6 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:7 mmBase Number Matches:1

LTC4270/ 数据手册

 浏览型号LTC4270/的Datasheet PDF文件第2页浏览型号LTC4270/的Datasheet PDF文件第3页浏览型号LTC4270/的Datasheet PDF文件第4页浏览型号LTC4270/的Datasheet PDF文件第5页浏览型号LTC4270/的Datasheet PDF文件第6页浏览型号LTC4270/的Datasheet PDF文件第7页 
LTC4290/LTC4271  
+
8-Port PoE/PoE  
PSE Controller  
FEATURES  
DESCRIPTION  
n
Eight Independent PSE Channels  
The LTC®4290/LTC4271 chipset is an 8-port power sourc-  
ing equipment (PSE) controller designed for use in IEEE  
802.3at Type 1 and Type 2 (high power) compliant Power  
over Ethernet (PoE) systems. Transformer-isolated com-  
munication protocol replaces expensive opto-couplers  
and complex isolated 3.3V supply resulting in significant  
BOMcostsavings.TheLTC4290/LTC4271chipsetdelivers  
n
Compliant with IEEE 802.3at Type 1 and 2  
n
Chipset Provides Electrical Isolation  
Reduced BOM Cost  
Eliminates up to 6 High Speed Opto-Couplers  
Eliminates Isolated 3.3V Power Supply  
n
Low Power Dissipation  
0.25Ω Sense Resistance Per Channel  
lowest-in-industryheatdissipationbyutilizinglow-R  
external MOSFETs and 0.25Ω sense resistors.  
DS(ON)  
n
Very High Reliability 4-Point PD Detection  
2-Point Forced Voltage  
Advancedpowermanagementfeaturesincludeper-port12-  
bit current monitoring ADCs, DAC-programmable current  
limit, and versatile fast shut-down of preselected ports.  
Advanced power management host software is available  
under a no-cost license. PD discovery uses a proprietary  
dual-mode 4-point detection mechanism ensuring excel-  
lent immunity from false PD detection. Midspan PSEs  
are supported with 2-event classification and a 2 second  
2-Point Forced Current  
n
V
and V  
Monitoring  
EE  
PORT  
n
n
n
n
1 Second Rolling I  
Averaging  
PORT  
Supports 2-Pair and 4-Pair Output Power  
2
1MHz I C Compatible Serial Control Interface  
Available In a 40-Lead 6mm × 6mm (LTC4290)  
and 24-Lead 4mm × 4mm (LTC4271) QFN Package  
2
backofftimer.TheLTC4290/LTC4271includesanI Cserial  
interface operable up to 1MHz.  
APPLICATIONS  
n
L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks  
PoE PSE Switches/Routers  
PoE PSE Midspans  
++  
and LTPoE is a trademark of Linear Technology Corporation. All other trademarks are the  
n
property of their respective owners.  
TYPICAL APPLICATION  
3.3V  
0.1µF  
V
DD33  
XIO0  
XIO1  
OUTn  
GP0  
GP1  
0.22µF  
100V  
S1B  
PORTn  
NO ISOLATION  
CPD  
CPA  
MID  
REQUIRED ON  
I C INTERFACE  
2
100Ω  
100Ω  
100Ω  
–54V  
RESET  
MSD  
AUTO  
INT  
GATEn  
S1B  
–54V  
3.3V  
3.3V  
0.25Ω  
100Ω  
SENSEn  
CND  
DPD  
CNA  
DPA  
LTC4271  
LTC4290  
SCL  
SDAIN  
SDAOUT  
0.22µF  
100V  
S1B  
100Ω  
100Ω  
100Ω  
PORT1  
OUT1  
–54V  
100Ω  
AD0  
AD1  
AD2  
AD3  
AD6  
S1B  
GATE1  
0.25Ω  
DND  
DNA  
–54V  
SENSE1  
V
VSSK AGND  
DGND  
CAP1  
CAP2  
EE  
2nF 2kV  
1µF  
0.1µF  
+
>47µF  
SYSTEM  
BULK CAP  
1µF  
–54V  
–54V  
429071 TA01a  
429071f  
1

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