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LTC4267CDHC PDF预览

LTC4267CDHC

更新时间： 2024-09-11 22:29:35
品牌 Logo 应用领域
凌特 - Linear 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管以太网
页数 文件大小 规格书
32页 1975K
描述
Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulator

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中文翻译

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LTC4267CDHC 技术参数

是否Rohs认证： 不符合生命周期：Transferred
零件包装代码：DFN包装说明：HVSSON, SSOP16,.25
针数：16Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.11模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODEJESD-30 代码：R-PDSO-N16
JESD-609代码：e0长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：70 °C
最低工作温度：最大输出电流：1 A
封装主体材料：PLASTIC/EPOXY封装代码：HVSSON
封装等效代码：SSOP16,.25封装形状：RECTANGULAR
封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE, SHRINK PITCH峰值回流温度（摄氏度）：235
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：SINGLE最大切换频率：240 kHz
技术：CMOS温度等级：COMMERCIAL
端子面层：Tin/Lead (Sn/Pb)端子形式：NO LEAD
端子节距：0.5 mm端子位置：DUAL
处于峰值回流温度下的最长时间：20宽度：3 mm
Base Number Matches：1

LTC4267CDHC 数据手册

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LTC4267  
Power over Ethernet  
IEEE 802.3af PD Interface with  
Integrated Switching Regulator  
U
FEATURES  
DESCRIPTIO  
Complete Power Interface Port for IEEE 802®.3af  
The LTC®4267 combines an IEEE 802.3af compliant Pow-  
ered Device (PD) interface with a current mode switching  
regulator, providing a complete power solution for PD  
applications. The LTC4267 integrates the 25kΩ signature  
resistor,classificationcurrentsource,thermaloverloadpro-  
tection,signaturedisableandpowergoodsignalalongwith  
an undervoltage lockout optimized for use with the IEEE-  
requireddiodebridge.Theprecisionduallevelinputcurrent  
limit allows the LTC4267 to charge large load capacitors  
and interface with legacy PoE systems.  
■
Powered Device (PD)  
■
Onboard 100V, 400mA UVLO Switch  
■
Precision Dual Level Inrush Current Limit  
■
Integrated Current Mode Switching Regulator  
■
Onboard 25kΩ Signature Resistor with Disable  
■
Programmable Classification Current (Class 0-4)  
■
Thermal Overload Protection  
Power Good Signal  
■
■
Integrated Error Amplifier and Voltage Reference  
■
Low Profile 16-Pin SSOP and 3mm × 5mm DFN  
The current mode switching regulator is designed for  
driving a 6V rated N-channel MOSFET and features pro-  
grammable slope compensation, soft-start, and constant  
frequency operation, minimizing noise even with light  
loads. The LTC4267 includes an onboard error amplifier  
and voltage reference allowing use in both isolated and  
nonisolated configurations.  
Packages  
U
APPLICATIO S  
■
IP Phone Power Management  
■
Wireless Access Points  
■
Security Cameras  
Power over Ethernet  
■
The LTC4267 is available in space saving, low profile  
16-pin SSOP or DFN packages.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
802 is a registered trademark of Institute of Electrical and Electronics Engineers, Inc.  
U
TYPICAL APPLICATIO  
Class 2 PD with 3.3V Isolated Power Supply  
PA1133 SBM1040  
3.3V  
1.5A  
10k  
+
–48V  
•
HD01  
FROM  
V
P
PORTP  
VCC  
+
320µF  
P
CHASSIS  
DATA PAIR  
5µF  
VCC  
+
–
•
MIN  
4.7µF  
PWRGD  
LTC4267  
SMAJ58A  
NGATE  
SENSE  
/RUN  
Si3440  
10k  
0.1µF  
0.1Ω  
P
VCC  
6.8k  
R
I
CLASS  
TH  
470  
+
HD01  
R
–48V  
FROM  
SPARE PAIR  
CLASS  
68.1Ω  
V
FB  
1%  
–
100k  
SIGDISA  
22nF  
PGND  
BA5516  
V
P
OUT  
PORTN  
PS2911  
60.4k  
TLV431  
4267 TA01  
4267f  
1
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中文翻译

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