- 您现在的位置：买卖IC网 > PDF目录1935 > LTC4264IDE#TRPBF (Linear Technology)IC CNTRLR PD INTERFACE 12-DFN PDF资料下载
参数资料
| 型号： | LTC4264IDE#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 2/24页 |
| 文件大小： | 0K |
| 描述： | IC CNTRLR PD INTERFACE 12-DFN |
| 标准包装： | 2,500 |
| 控制器类型： | 以太网供电控制器（POE） |
| 接口： | IEEE 802.3af |
| 电流 - 电源： | 3mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 12-WFDFN 裸露焊盘 |
| 供应商设备封装： | 12-DFN（4x3） |
| 包装： | 带卷 (TR) |
LTC4264
10
4264f
APPLICATIONS INFORMATION
RX –
6
RX +
3
TX –
2
TX +
RJ45
T1
POWERED
DEVICE (PD)
INTERFACE
AS DEFINED
BY IEEE 802.3af
4264 F04
1
7
8
5
4
SPARE –
SPARE+
TO PHY
BR2
0.1
F
100V
BR1
GND
D3
LTC4264
VIN
Figure 4. PD Front End Using Diode Bridges on Main and Spare Inputs
pin high will reduce the signature resistor to 10k which is
an invalid signature per the IEEE 802.3af specications.
This will prevent a PSE from detecting and powering the
PD. This invalid signature is present in the PSE probing
range of –2.8V to –10V. When the input rises above –10V,
the signature resistor reverts to 25k to minimize power
dissipation in the LTC4264. To disable the signature, tie
SHDN to GND. Alternately, the SHDN pin can be driven
high with respect to VIN. When SHDN is high, all functions
are disabled. For normal operation tie SHDN to VIN.
CLASSIFICATION
Once the PSE has detected a PD, the PSE may option-
ally classify the PD. Classication provides a method for
more efcient allocation of power by allowing the PSE
to identify lower-power PDs and assign the appropriate
power level to these devices. For each class, there is an
associated load current that the PD asserts onto the line
during classication probing. The PSE measures the PD
load current in order to assign the proper PD classica-
tion. Class 0 is included in the IEEE 802.3af specication
to cover PDs that do not support classication. Class 1-3
partition PDs into three distinct power ranges as shown in
Table 2. Class 4 is reserved by the IEEE 802.3af committee
for future use. The new Class 5 dened here is available
for system vendors to implement a unique classication
for use in closed systems and is not dened or supported
by the IEEE 802.3af. With the extended classication
range available in the LTC4264, it is possible for system
designers to dene multiple classes using load currents
between 40mA and 75mA.
GND
VIN
SHDN
LTC4264
SIGNATURE DISABLE
4264 F05
25k SIGNATURE
RESISTOR
16k
TO
PSE
Figure 5. 25k Signature Resistor with Disable
相关PDF资料 |
PDF描述 |
|---|---|
| LTC4266IGW#PBF | IC CTRLR IEEE 802.3AT 36-SSOP |
| LTC4267IDHC#TRPBF | IC POE 802.3AF INTERFACE 16-DFN |
| LTC4278IDKD#TRPBF | IC PD IEEE 802.3AT 25.5W 32-DFN |
| LTC4305IDHD#TRPBF | IC BUFFER BUS 2WR ADDRESS 16-DFN |
| LTC4306IUFD#TRPBF | IC MUX 4CH 2-WIRE BUS 24-QFN |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC4265 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Quad IEEE 802.3at Power over Ethernet Controller |
| LTC4265CDE#PBF | 功能描述:IC CTRLR PD INTERFACE HP 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4265CDE#TRPBF | 功能描述:IC CTRLR PD INTERFACE HP 12-DFN RoHS:是 类别:集成电路 (IC) >> PMIC - 热交换 系列:- 标准包装:50 系列:- 类型:热交换控制器 应用:-48V 远程电力系统，AdvancedTCA ? 系统，高可用性 内部开关:无 电流限制:可调 电源电压:11.5 V ~ 14.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:10-TFSOP，10-MSOP（0.118"，3.00mm 宽） 供应商设备封装:10-MSOP 包装:管件 |
| LTC4265CDE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:IEEE 802.3at High Power PD Interface Controller with 2-Event Classifi cation Recognition |
| LTC4265CDE-TRPBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:IEEE 802.3at High Power PD Interface Controller with 2-Event Classifi cation Recognition |
发布紧急采购，3分钟左右您将得到回复。