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LTC4267CDHC-3 PDF预览

LTC4267CDHC-3

更新时间： 2024-09-12 12:46:35
品牌 Logo 应用领域
凌特 - Linear 稳压器开关光电二极管以太网
页数 文件大小 规格书
32页 2017K
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-3 数据手册

 浏览型号LTC4267CDHC-3的Datasheet PDF文件第2页浏览型号LTC4267CDHC-3的Datasheet PDF文件第3页浏览型号LTC4267CDHC-3的Datasheet PDF文件第4页浏览型号LTC4267CDHC-3的Datasheet PDF文件第5页浏览型号LTC4267CDHC-3的Datasheet PDF文件第6页浏览型号LTC4267CDHC-3的Datasheet PDF文件第7页 
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.  
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
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  
MIN  
P
CHASSIS  
DATA PAIR  
5µF  
VCC  
+
–
•
MIN  
4.7µF  
PWRGD  
LTC4267  
SMAJ58A  
NGATE  
SENSE  
/RUN  
Si3440  
10k  
0.1µF  
0.1Ω  
P
VCC  
R
I
CLASS  
TH  
470  
+
HD01  
R
–48V  
FROM  
SPARE PAIR  
CLASS  
6.8k  
68.1Ω  
V
FB  
1%  
–
100k  
SIGDISA  
22nF  
PGND  
BAS516  
V
P
PORTN  
OUT  
PS2911  
60.4k  
TLV431  
4267 TA01  
4267fc  
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LTC4267CGN#TR Linear

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 		LTC4267 - Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulato
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 		LTC4267 - Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regulato
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LTC4267CGN-1#PBF Linear

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 		LTC4267-1 - Power over Ethernet IEEE 802.3af PD Interface with Integrated Switching Regula
LTC4267CGN-1#TR Linear

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 		IC 1 A SWITCHING CONTROLLER, 240 kHz SWITCHING FREQ-MAX, PDSO16, 0.150 INCH, PLASTIC, SSOP

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