- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄377778 > LTC4257CDD-1 (LINEAR TECHNOLOGY CORP) Power over Ethernet Interface Controller with Dual Current Limit PDF資料下載
參數(shù)資料
| 型號(hào)： | LTC4257CDD-1 |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 電源管理 |
| 英文描述： | Power over Ethernet Interface Controller with Dual Current Limit |
| 中文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO8 |
| 封裝： | 3 X 3 MM, PLASTIC, M0-229WEED-1, DFN-8 |
| 文件頁數(shù)： | 1/32頁 |
| 文件大小： | 1975K |
| 代理商： | LTC4257CDD-1 |
當(dāng)前第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁
LTC4267
1
4267f
FEATURES
DESCRIPTIO
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 25k
Ω
signature
resistor, classification current source, thermal overload pro-
tection, signature disable and power good signal along with
an undervoltage lockout optimized for use with the IEEE-
required diode bridge. The precision dual level input current
limit allows the LTC4267 to charge large load capacitors
and interface with legacy PoE systems.
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.
The LTC4267 is available in space saving, low profile
16-pin SSOP or DFN packages.
U
APPLICATIU
TYPICAL APPLICATIO
U
Class 2 PD with 3.3V Isolated Power Supply
802 is a registered trademark of Institute of Electrical and Electronics Engineers, Inc.
P
VCC
PWRGD
NGATE
SENSE
I
TH
/RUN
V
FB
PGND
P
OUT
V
PORTP
R
CLASS
SIGDISA
V
PORTN
LTC4267
+
+
R
68.1
1%
5μF
MIN
10k
470
100k
60.4k
P
VCC
4.7μF
P
VCC
320μF
22nF
PA1133
PS2911
BA5516
TLV431
SBM1040
SMAJ58A
3.3V
1.5A
CHASSIS
HD01
+
–
+
–
HD01
–48V
FROM
DATA PAIR
–48V
FROM
SPARE PAIR
4267 TA01
Si3440
0.1
6.8
k
10
k
0.1μF
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
Power over Ethernet
IEEE 802.3af PD Interface with
Integrated Switching Regulator
■
IP Phone Power Management
■
Wireless Access Points
■
Security Cameras
■
Power over Ethernet
■
Complete Power Interface Port for IEEE 802
.3af
Powered Device (PD)
■
Onboard 100V, 400mA UVLO Switch
■
Precision Dual Level Inrush Current Limit
■
Integrated Current Mode Switching Regulator
■
Onboard 25k
Ω
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
Packages
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LTC4267 | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC4267IDHC | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC4267IGN | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC4267CGN | RADIATION HARDENED HIGH EFFICIENCY, 5 AMP SWITCHING REGULATORS |
| LTC4259A | Quad IEEE 802.3af Power over Ethernet Controller with AC Disconnect |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LTC4257CDD-1#PBF | 功能描述:IC CONTROLLER POE INTERFACE 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4257CDD-1#TR | 功能描述:IC CONTROLLER POE INTERFACE 8DFN RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4257CDD-1#TRPBF | 功能描述:IC CONTROLLER POE INTERFACE 8DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4257CS8 | 功能描述:IC CTRLR INTFACE PWR/ETHER 8SOIC RoHS:否 類別:集成電路 (IC) >> PMIC - 熱交換 系列:- 標(biāo)準(zhǔn)包裝:50 系列:- 類型:熱交換控制器 應(yīng)用:-48V 遠(yuǎn)程電力系統(tǒng)，AdvancedTCA ? 系統(tǒng)，高可用性 內(nèi)部開關(guān):無 電流限制:可調(diào) 電源電壓:11.5 V ~ 14.5 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:10-TFSOP，10-MSOP（0.118"，3.00mm 寬） 供應(yīng)商設(shè)備封裝:10-MSOP 包裝:管件 |
| LTC4257CS8-#1TRPBF | 制造商:LINEAR_TECH 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。