PEM1312 Datasheet, PDF (1/5 Pages) List of Unclassifed Manufacturers – Power Over Ethernet PD Module

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PRODUCT OVERVIEW
The PEM1300 series of power extraction
modules, have complete compliance with the
IEEE 802.3af Power-Over-Ethernet (PoE)
standard, and are designed to extract power from
CAT5 Ethernet cable when sourced by a IEEE
802.3af compliant Power Sourcing Equipment
(PSE).
With the increasing demand for “Green Power”
IEEE has emphasized the need for power “right-
sizing”. The PEM1300 series Powered Device
(PD) modules provides full PoE signature and
programmable power classification for granular
power management.
Its high efficiency DC-DC converter provides a
well regulated low noise and low ripple output
with in-built overload and output short-circuit
protection.
The PEM1300 series provides a quick, easy, and
low cost method for Ethernet equipment
manufacturers to “PoE enable” their equipment.
PRODUCT FEATURES
 Fully IEEE 802.3af compliant
 12.95 watt output load¹
 IEEE Power class programmable (Green)
 1500 Volt DC isolation (Input to Output)
 3.3V, 5V, 12V DC output voltage models
 Compact package minimum PCB footprint
 Minimal external components required
 Overload and short circuit protection²
 Wide input voltage (36V to 57V DC)
 Adjustable output voltage
 RoHS 2002/95/EC compliant
 Low output ripple and noise
 Low cost
1
In 5V and 12V model
2
If maximum power is exceeded, the PEM1300 will
operate in over current mode and will auto recover when
the over load condition is removed.
www.poweredethernet.com
PEM1300 SERIES
Power Over Ethernet PD Module
PRODUCT SELECTOR
Part Number Marking
Nominal
Input Voltage
(Volts DC)
PEM1303
3
48
PEM1305
5
48
PEM1312
12
48
Output
Voltage³
(Volts DC)
3.3
5
12
Efficiency⁴
(%)
80
81
84
Power
(Maximum) ^6,7
(Watts)
10
12.95
12.95
ABSOLUTE MAXIMUM RATINGS⁵,⁶
Supply Voltage (VCC)
0V – 57V DC
Storage Temperature (TS) -25 ^OC – 100 ^OC
Output Voltage (VOUT)
0V to controlled output voltage (operating or non-operating)
INPUT CHARACTERISTICS
Parameter
Input Voltage⁷
Under Voltage Lockout
Input Current⁸,¹⁰
Operating Temperature⁹
IEEE 802.3af Power Classification¹⁰
Symbol Min. Typ⁴. Max.
Units
VIN
36
48
57
Volts
VUVLO
30
36
Volts
IIN
350 400
mA
TOP
-20
25
70
O_C
Programmable Class 0, 1, 2, or 3
DC OUTPUT CHARACTERISTICS
Parameter
Symbol Min. Typ⁴. Max.
Units
Line Regulation⁸
VLNRG
0.2%
Load Regulation⁸
VLDRG
0.5%
Output Ripple and Noise^{5, 8}
VRIP
80
mV p-p
Isolation Voltage
VISOL
1500 V DC
Temperature Coefficient (Slope)
TC
100
300
ppm ^OC
Figure 1 - BLOCK DIAGRAM and TYPICAL CONNECTIONS
~^VINA+
Input
~
-
+
~
~
~
~
Input
-
+
~
~
VINB-
CP1
CP2
PEM1300
IEEE
802.3af
Signature
and
Control
DC-DC
Converter
ADJ
+VDC
+VDC
DC
Output
+
C1
470uF
Low ESR
-VDC
-VDC
(Optional) C2 – Safety Capacitor (for EMI tuning)
3 _{Output voltage typical ± 3% at TA of 250C with a nominal input voltage and rated output current.}
4
At nominal Vin at 67% load
5 _{All specifications typical are at TA of 250C with a nominal input voltage and rated output current}
unless otherwise noted. These are meant as a design aid only and are indicative, and not guaranteed.
6
Exceeding the absolute maximum ratings may cause permanent damage to the product. We do not
imply functional operation under these conditions. These ratings assume free air flow.
7
With minimum load 100mA
8
Please refer to IEEE802.3af standards document. Maximum input current is dependent on power
class, and input voltage. Input current (DC or RMS) at VPORT =37vDC is 350mA, at VPORT =57vDC is
230mA. Peak inrush current is 400mA for 50mS max at duty cycle of 5% max.
9
Please see section F.6. – Thermal profile on operating temperature
10
Please see section F.2 – Powered Device Signature and Class programming for more details
PEM1300_11G-R0-8 (DRAFT)
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