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参数资料
| 型号： | NCP1083DER2G |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/18页 |
| 文件大小： | 257K |
| 描述： | IC CONV CTLR POE-PD 40W 20-TSSOP |
| 标准包装： | 2,500 |
| 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： | 带卷 (TR) |
NCP1083
http://onsemi.com
3
SIMPLIFIED APPLICATION DIAGRAMS
Figure 2. Isolated Flyback Converter with Rear Auxiliary Supply
NCP1083
Rcs
Cvddl
Cvddh
Cpd
Css
Rosc
M1
T1
Cload
LD1
Rd1
Rclass
Rilim1
Rinrush
Optocoupler
R3
R4
R5
C1
Z1
Rslope
C2
Voutput
D1
OC1
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
D2
D3
Cline
Z_line
COMP
SS
OSC
nCLASS_AT
Figure 2 shows the integrated PoEPD switch and DCDC controller configured to work in a fully isolated application. The
output voltage regulation is accomplished with an external optocoupler and a shunt regulator (Z1).
Figure 3. NonIsolated Flyback 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
D2
D3
Cline
Z_line
COMP
SS
OSC
R3
R4
C1comp
C2comp
Rcomp
nCLASS_AT
Figure 3 shows the integrated PoEPD and DCDC controller configured in a nonisolated flyback configuration. A
compensation network is inserted between the FB and the COMP pin for overall stability of the feedback loop.
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