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参数资料
| 型号： | NCP1090DG |
| 厂商： | ON Semiconductor |
| 文件页数： | 12/12页 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE CTLR POE-PD 8-SOIC |
| 特色产品： | NCP1090 Controller |
| 标准包装： | 96 |
| 系列： | HIPO™ |
| 控制器类型： | PoE-PD 接口 |
| 接口： | IEEE 802.3af |
| 电流 - 电源： | 500mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOIC |
| 包装： | 散装 |
| 其它名称： | NCP1090DGOS |
NCP1090, NCP1091, NCP1092
http://onsemi.com
9
NCP1090
Rclass
Rinrush
RTN
VPORTN
CLASS
INRUSH
VPORTP
DET
Cpd
PGOOD
DCDC Converter
Controller
VSS
VDD
OVLO
UVLO
GATE
Rdet
Figure 8. Power GOOD Implementation
NCP103x
Auxiliary Supply
To support application connected to nonPoE enabled
networks and minimize the bill of materials, the NCP1093
supports drawing power from an external supply and allows
simplified designs with PoE or auxiliary supply priorities.
In most of the cases, the auxiliary supply is connected
between VPORTP and RTN with a serial diode between
VPORTP and VAUX, as shown in Figure 9.
NCP1092
Data
Pairs
Cline
Spare
Pairs
Rclass
Rinrush
RJ45
DB1
DB2
Z_line
RTN
VPORTN
CLASS
INRUSH
AUX
VPORTP
DET
To DCDC
Converter
Cpd
PGOOD
Rdet
VAUX (+)
VAUX ()
Figure 9. Auxiliary Supply Dominant PD Interface
The NCP1092 offers an AUX input pin which turns off the
pass switch when pulled high. This feature is useful for PD
applications where the auxiliary supply has to be dominant
over the PoE supply. When the auxiliary supply is inserted
on a POE powered application, the pass switch
disconnection will move the current path from the PSE to the
rear auxiliary supply. Since the current delivered by the PSE
will goes below the DC MPS level (specified in IEEE
802.3 af/at standard), the PSE will disconnect the PoEPD
and the application will remain supplied by the auxiliary
supply. The transition will happens without any power
conversion interruption since the PGOOD indicator stays
active (high impedance state).
Next Figure 10 depicts an other PD application where the
POE supply is dominant over the VAUX supply. A diode D1
has been added in order to not corrupt the PD detection
signature when the dcdc converter is supplied by VAUX.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| NCP1090DRG | 功能描述:开关变换器、稳压器与控制器 HINT O1A SOIC8 3ST 8INPUT RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| NCP1091 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:Integrated IEEE 802.3af PoE-PD Interface Controller |
| NCP1091DBG | 功能描述:开关变换器、稳压器与控制器 HINT OAA TSSOP8 NCP1091DB RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| NCP1091DBRG | 功能描述:开关变换器、稳压器与控制器 HINT OAA TSSOP8 NCP1091DB RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
| NCP1091DG | 功能描述:开关变换器、稳压器与控制器 HINT OAA SOIC8 RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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