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參數(shù)資料
| 型號： | NCP1081DEG |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 12/18頁 |
| 文件大?。?/td> | 257K |
| 描述： | IC CONV CTLR POE-PD 40W 20-TSSOP |
| 標(biāo)準(zhǔn)包裝： | 74 |
| 類型： | 以太網(wǎng)供電開關(guān)（PoE） |
| 應(yīng)用： | 遠(yuǎn)程外設(shè)（工業(yè)控制，相機(jī)，數(shù)據(jù)訪問） |
| 內(nèi)部開關(guān)： | 是 |
| 電流限制： | 1.1A |
| 電源電壓： | 0 V ~ 57 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-TSSOP（0.173"，4.40mm 寬）裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 20-TSSOP-EP |
| 包裝： | 管件 |
NCP1081
http://onsemi.com
12
Figure 7. Hardware Physical Classification Event Sequence
1st Class Event
Class range
Mark Range
Reset Range
2 Fingers Classification with
0 V
5.4 V
9.5 V
13 V
20.5 V
UVLO_on
Power On
Detection
PSE identified as type 2 PSE (at)
PSE Type identification:
Number of Mark Event:
0
1
2
X
Operation Mode:
Mark Events (.at spec)
1st Mark Event 2nd Class Event
2nd Mark Event
PSE identified by default as type 1 PSE (af)
nCLASS_AT Indicator
The nCLASS_AT active low open drain output pin can be
used to notify to the microprocessor of the powered device
that the PSE performed a one or two event hardware
classification. If a two event hardware classification has
occured and once the PD application is supplied power by
the NCP1081 DC-DC converter, the nCLASS_AT pin will
be pulled down to ARTN by the internal low voltage NMOS
switch (ARTN is the ground connection of the DC-DC
converter). Otherwise, nCLASS_AT will be disabled and
will be pulled up to VDDL (3.3 V typ) via an internal current
source (20 mA typ) and via the external pull-up resistor.
The following scheme illustrates how the nCLASS_AT
pin may be configured with the processor of the powered
device. An opto-coupler is used to guarantee full isolation
between the Ethernet cable and the application.
Figure 8. Isolated nClass_AT Communication with the Powered Device Application
ARTN
NCP1081
nCLASS_AT
Class_AT
VDDL
VDDL
Csup
Powered Device Application
Rled
Opto 1
Rbip
Isolation
VSUP
Microprocessor
Microcontroller
IN1
IN2
GND
Layer 2
Engine
Features
(Isolated DC/DC converter)
or
20 mA
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| NCP1081DER2G | 功能描述:DC/DC 開關(guān)控制器 POE-PD 40W DC-DC RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK |
| NCP1081SPCGEVB | 功能描述:電源管理IC開發(fā)工具 HPOWER POE-PD SPLITTER RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V |
| NCP1082 | 制造商:ONSEMI 制造商全稱:ON Semiconductor 功能描述:Integrated PoE-PD & DC-DC Converter Controller with 9V Auxiliary Supply Support |
| NCP1082DEG | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 POE-PD 13W DC-DC AUX SUPP RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| NCP1082DER2G | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 POE-PD 13W DC-DC AUX SUPP RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
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