NCP1081DER2G ON Semiconductor, NCP1081DER2G Datasheet - Page 12
NCP1081DER2G
Manufacturer Part Number
NCP1081DER2G
Description
IC CONV CTLR POE-PD 40W 20-TSSOP
Manufacturer
ON Semiconductor
Type
Power over Ethernet Switch (PoE)r
Datasheet
1.NCP1081DER2G.pdf
(17 pages)
Specifications of NCP1081DER2G
Applications
Remote Peripherals (Industrial Controls, Cameras, Data Access)
Internal Switch(s)
Yes
Current Limit
1.1A
Voltage - Supply
0 V ~ 57 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
Output Voltage
9 V
Switching Frequency
250 KHz
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Output Power
40 W
Input Voltage
57V
Supply Current
510mA
Digital Ic Case Style
TSSOP
No. Of Pins
20
Duty Cycle (%)
80%
Uvlo
38V
Frequency
500kHz
Svhc
No SVHC (20-Jun-2011)
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
NCP1081DER2G
Manufacturer:
IXYS
Quantity:
7 710
IEEE802.3at (D3.0) compliant may apply more than two
fingers, but the final result will be the same as two fingers).
nCLASS_AT Indicator
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
The nCLASS_AT active low open drain output pin can be
PSE Type identification:
Operation Mode:
Number of Mark Event:
Reset Range
Mark Range
Class range
Class_AT
Figure 8. Isolated nClass_AT Communication with the Powered Device Application
NCP1081
VDDL
Detection
20.5 V
13 V
9.5 V
5.4 V
0 V
20uA
X
Figure 7. Hardware Physical Classification Event Sequence
PSE identified by default as type 1 PSE (af)
1st Class Event
0
ARTN
nCLASS_AT
VDDL
1st Mark Event 2nd Class Event
http://onsemi.com
2 Fingers Classification with
Rled
Mark Events (.at spec)
(Isolated DC/DC converter)
12
Opto 1
Isolation
switch (ARTN is the ground connection of the DC−DC
converter). Otherwise, nCLASS_AT will be disabled and
will be pulled up to VDDL (3.3V typ) via an internal current
source (20 mA typ) and via the external pull−up resistor.
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.
1
The following scheme illustrates how the nCLASS_AT
Rbip
Csup
2nd Mark Event
Powered Device Application
PSE identified as type 2 PSE (at)
IN2
IN1
UVLO_on
GND
VSUP
2
Microprocessor
Microcontroller
Power On
Features
Layer 2
Engine
or