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LTC4258CGW

更新时间： 2024-11-08 22:24:27
品牌 Logo 应用领域
凌特 - Linear 光电二极管控制器以太网
页数 文件大小 规格书
28页 290K
描述
Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection

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中文翻译

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LTC4258CGW 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：SSOP包装说明：SSOP, SOP36,.4,32
针数：36Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13可调阈值：NO
模拟集成电路 - 其他类型：POWER SUPPLY SUPPORT CIRCUITJESD-30 代码：R-PDSO-G36
JESD-609代码：e0长度：15.417 mm
湿度敏感等级：1信道数量：4
功能数量：1端子数量：36
最高工作温度：70 °C最低工作温度：
封装主体材料：PLASTIC/EPOXY封装代码：SSOP
封装等效代码：SOP36,.4,32封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, SHRINK PITCH峰值回流温度（摄氏度）：235
电源：3.3,-48 V认证状态：Not Qualified
座面最大高度：2.641 mm子类别：Power Management Circuits
最大供电电压 (Vsup)：4 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：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：GULL WING
端子节距：0.8 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：7.506 mm
Base Number Matches：1

LTC4258CGW 数据手册

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Electrical Specifications Subject to Change  
LTC4258  
Quad IEEE 802.3af  
Power over Ethernet Controller  
with Integrated Detection  
U
FEATURES  
DESCRIPTIO  
The LTC®4258 is a quad –48V Hot SwapTM controller de-  
signed for use in IEEE 802.3af compliant Power  
SourcingEquipment(PSE).Itconsistsoffourindependent  
ports, each with output current limit, short-circuit protec-  
tion, complete Powered Device (PD) detection and classi-  
ficationcapability,andprogrammablePDdisconnectusing  
■
Controls Four Independent –48V Powered  
Ethernet Ports  
■
Each Port Includes:  
– IEEE 802®.3af Compliant PD Detection and  
Classification  
– Output Current Limit with Foldback  
– Short-Circuit Protection with Fast Gate Pull-Down  
– PD Disconnect Using DC Sensing  
– Power Good Indication  
ACorDCsensing.UsedwithpowerMOSFETsandpassives  
asinFigure1,theLTC4258canimplementacompleteIEEE  
802.3af-compliant PSE.  
Operates Autonomously or Controlled by I2CTM  
Serial Interface  
■
■
TheLTC4258canoperateautonomouslyorbecontrolledby  
2
an I C serial interface. Up to 16 LTC4258s may coexist on  
4-Bit Programmable Digital Address Allows Control  
of Up to 64 Ports  
thesamedatabus,allowingupto64poweredEthernetports  
to be controlled with only two digital lines. Fault conditions  
areoptionallysignaledwiththeINTpintoeliminatesoftware  
polling.  
■
■
Programmable INT Pin Eliminates Software Polling  
Current and Duty Cycle Limits Protect External FETs  
U
APPLICATIO S  
External power MOSFETs, current sense resistors and di-  
odes allow easy scaling of current and power dissipation  
levels and provide protection against voltage and current  
spikes and ESD events.  
■
IEEE 802.3af Compliant Endpoint and Midspan  
Power Sources  
IP Phone Systems  
DTE Power Distribution  
■
■
The LTC4258 is available in a 36-pin SSOP package.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
Linear Technology also provides solutions for 802.3af PD  
applications with the LTC4257 and LTC4257-1.  
Hot Swap is a trademark of Linear Technology Corporation. 802 is a registered trademark of  
Instutute of Electrical and Electronics Engineers, Inc. I2C is a trademark of Philips Electronics N.V.  
U
TYPICAL APPLICATIO  
0.1µF  
100V X7R  
3.3V  
0.1µF  
INT  
SHDN1 SHDN2SHDN3 SHDN4  
V
AUTO BYP  
RESET  
SCL  
DD  
SDAIN  
SDAOUT  
AD0  
AD1  
AD2  
DETECT1  
DETECT2  
DETECT3  
LTC4258  
0.1µF 100V  
×4  
SMAJ58A  
×4  
CMPD3003  
×4  
DETECT4  
SENSE1 GATE1 OUT1 SENSE2 GATE2 OUT2 SENSE3 GATE3 OUT3 SENSE4 GATE4 OUT4  
AD3  
DGND AGND  
V
EE  
10k  
10k  
10k  
10k  
R
S1  
OUT1  
OUT2  
OUT3  
OUT4  
–48V  
Q1  
R
S2  
0.1µF  
Q2  
R
S3  
Q3  
R
S4  
4258 F01  
Q4  
RS1 TO RS4: 0.5Ω  
Q1 TO Q4: IRFM120A  
Figure 1. Complete 4-Port Powered Ethernet Power Source  
4258p  
1
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中文翻译

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LTC4258CGW 替代型号

型号 品牌 替代类型 描述 数据表
LTC4258CGW#PBF Linear

功能相似

 LTC4258 - Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection; Pack
LTC4259ACGW-1 Linear

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 Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect

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LTC4258CGW#PBF Linear

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 		LTC4258 - Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection; Pack
LTC4258CGW#TR Linear

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 		暂无描述
LTC4258CGW#TRPBF Linear

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 		LTC4258 - Quad IEEE 802.3af Power over Ethernet Controller with Integrated Detection; Pack
LTC4259A Linear

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LTC4259ACGW Linear

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LTC4259ACGW#PBF Linear

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 		LTC4259A - Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: S
LTC4259ACGW#TRPBF Linear

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 		LTC4259A - Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect; Package: S
LTC4259ACGW-1 Linear

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 		Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect
LTC4259ACGW-1#TR Linear

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