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參數(shù)資料
| 型號： | NCP1092DRG |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 12/12頁 |
| 文件大小： | 0K |
| 描述： | IC INTERFACE CTLR POE-PD 8-SOIC |
| 標準包裝： | 1 |
| 系列： | HIPO™ |
| 控制器類型： | PoE-PD 接口 |
| 接口： | IEEE 802.3af |
| 電流 - 電源： | 500mA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 8-SOIC |
| 包裝： | 標準包裝 |
| 其它名稱： | NCP1092DRGOSDKR |
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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| NCP1093MNG | 功能描述:熱插拔功率分布 RoHS:否 制造商:ON Semiconductor 產(chǎn)品: 電流限制: 電源電壓-最大: 電源電壓-最小: 工作溫度范圍: 功率耗散: 安裝風格: 封裝 / 箱體: 封裝: |
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| NCP1094MNRG | 功能描述:熱插拔功率分布 HINT OAA DFN10 NCP1094MNG RoHS:否 制造商:Texas Instruments 產(chǎn)品:Controllers & Switches 電流限制: 電源電壓-最大:7 V 電源電壓-最小:- 0.3 V 工作溫度范圍: 功率耗散: 安裝風格:SMD/SMT 封裝 / 箱體:MSOP-8 封裝:Tube |
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