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参数资料
| 型号： | NCP1083DEG |
| 厂商： | ON Semiconductor |
| 文件页数： | 4/18页 |
| 文件大小： | 257K |
| 描述： | IC CONV CTLR POE-PD 40W 20-TSSOP |
| 标准包装： | 74 |
| 类型： | 以太网供电开关（PoE） |
| 应用： | 远程外设（工业控制，相机，数据访问） |
| 内部开关： | 是 |
| 电流限制： | 1.1A |
| 电源电压： | 0 V ~ 57 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 20-TSSOP（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 20-TSSOP-EP |
| 包装： | 管件 |
NCP1083
http://onsemi.com
4
SIMPLIFIED APPLICATION DIAGRAMS
Figure 4. NonIsolated Flyback with Extra Winding and Rear Auxiliary Supply
NCP1083
Rcs
Cvddl
Cvddh
Cpd
Css
Rosc
M1
T1
Cload
LD1
Rd1
Rclass
Rilim1
Rinrush
Rslope
Voutput
D1
GATE
RTN
FB
VPORTN2
VDDH
VDDL
VPORTN1
CLASS
ARTN
ILIM1
INRUSH
TEST
AUX
UVLO
CS
VPORTP
Data
Pairs
Spare
Pairs
R1
R2
RJ45
DB1
DB2
Raux1
VAUX(+)
VAUX()
Raux2
Raux3
D3
D4
Cline
Z_line
COMP
SS
OSC
R3
R4
C1comp
C2comp
Rcomp
R5
D2
nCLASS_AT
Figure 4 shows the same nonisolated flyback configuration as Figure 3, but adds a 12 V auxiliary bias winding on the
transformer to provide power to the NCP1083 DCDC controller via its VDDH pin. This topology shuts off the current flowing
from VPORTP to VDDH and therefore reduces the internal power dissipation of the PD, resulting in higher overall power
efficiency.
Figure 5. NonIsolated Forward Converter with Rear Auxiliary Supply
NCP1083
Rcs
Cvddl
Cvddh
Cpd
Css
Rosc
M1
T1
Cload
LD1
Rd1
Rclass
Rilim1
Rinrush
Rslope
Voutput
D1
GATE
RTN
FB
VPORTN2
VDDH
VDDL
VPORTN1
CLASS
ARTN
ILIM1
INRUSH
TEST
AUX
UVLO
CS
VPORTP
Data
Pairs
Spare
Pairs
R1
R2
RJ45
DB1
DB2
Raux1
VAUX(+)
VAUX()
Raux2
Raux3
D4
D5
Cline
Z_line
COMP
SS
OSC
R3
R4
C1comp
C2comp
Rcomp
D3
D2
L1
nCLASS_AT
Figure 5 shows the NCP1083 used in a nonisolated forward topology.
High Power Considerations
The NCP1083 is designed to implement various
configurations of highpower PoE systems including those
based on the IEEE 802.3at standard. High power operation
can be enabled by a Dual Event Layer 1 classification or a
Single Event Layer 1 classification combined with a Layer 2
high power classification. The NCP1083 also supports
proprietary designs capable of delivering 25 W to 40 W to
the load in twopair configurations. A separate application
note describes these implementations (AND8332).
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| NCP1083DER2G | 功能描述:DC/DC 开关控制器 POE-PD 40W DC-DC AUX SUPP RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| NCP1083QBCGEVB | 功能描述:电源管理IC开发工具 HIGH POWER POE-PD MODULE RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1083WIRGEVB | 功能描述:电源管理IC开发工具 POE-PD MODULE WITH VAUX RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| NCP1086 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1.5 A Adjustable and 3.3 V Fixed Output Linear Regulator |
| NCP1086/D | 制造商:未知厂家 制造商全称:未知厂家 功能描述:1.5 A Adjustable and 3.3 V Fixed Output Linear Regulator |
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