PEM1300 SERIES by Power Over Ethernet PD Module PRODUCT SELECTOR Nominal Output Power 4 Efficiency 3 6,7 Input Voltage Voltage (Maximum) Part Number Marking (Volts DC) (Volts DC) (%) (Watts) PEM1303 3 48 3.3 80 10 PEM1305 5 48 5 81 12.95 PEM1312 12 48 12 84 12.95 5 6 ABSOLUTE MAXIMUM RATINGS , PRODUCT OVERVIEW Supply Voltage (V ) 0V 57V DC CC The PEM1300 series of power extraction O O Storage Temperature (TS) -25 C 100 C modules, have complete compliance with the IEEE 802.3af Power-Over-Ethernet (PoE) Output Voltage (V ) 0V to controlled output voltage (operating or non-operating) OUT standard, and are designed to extract power from CAT5 Ethernet cable when sourced by a IEEE 802.3af compliant Power Sourcing Equipment INPUT CHARACTERISTICS (PSE). 4 Parameter Symbol Min. Typ . Max. Units With the increasing demand for Green Power 7 Input Voltage VIN 36 48 57 Volts IEEE has emphasized the need for power right- s izing . The PEM1300 series Powered Device Under Voltage Lockout VUVLO 30 36 Volts (PD) modules provides full PoE signature and 8 10 Input Current , I 350 400 mA programmable power classification for granular IN power management. 9 O Operating Temperature TOP -20 25 70 C 10 Its high efficiency DC-DC converter provides a IEEE 802.3af Power Classification Programmable Class 0, 1, 2, or 3 well regulated low noise and low ripple output with in-built overload and output short-circuit DC OUTPUT CHARACTERISTICS protection. 4 Parameter Symbol Min. Typ . Max. Units The PEM1300 series provides a quick, easy, and 8 Line Regulation V 0.2% LNRG low cost method for Ethernet equipment 8 manufacturers to PoE enable their equipment. Load Regulation VLDRG 0.5% 5, 8 Output Ripple and Noise V 80 mV p-p RIP PRODUCT FEATURES Isolation Voltage VISOL 1500 V DC Fully IEEE 802.3af compliant O Temperature Coefficient (Slope) TC 100 300 ppm C 1 12.95 watt output load IEEE Power class programmable (Green) Figure 1 - BLOCK DIAGRAM and TYPICAL CONNECTIONS 1500 Volt DC isolation (Input to Output) ADJ VINA+ PEM1300 ~ 3.3V, 5V, 12V DC output voltage models ~ +VDC Input + - +VDC Compact package minimum PCB footprint ~ ~ IEEE Minimal external components required 802.3af DC ~ + 2 DC-DC ~ Output Overload and short circuit protection Signature C1 Converter Input + - and 470uF Wide input voltage (36V to 57V DC) Low ESR Control ~ ~ -VDC Adjustable output voltage VINB- CP1 -VDC CP2 RoHS 2002/95/EC compliant Low output ripple and noise (Optional) C2 Safety Capacitor (for EMI tuning) Low cost 3 0 Output voltage typical 3% at T of 25 C with a nominal input voltage and rated output current. A 4 At nominal Vin at 67% load 5 0 All specifications typical are at T of 25 C with a nominal input voltage and rated output current A 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 1 class, and input voltage. Input current (DC or RMS) at V =37vDC is 350mA, at V =57vDC is PORT PORT In 5V and 12V model 230mA. Peak inrush current is 400mA for 50mS max at duty cycle of 5% max. 2 If maximum power is exceeded, the PEM1300 will 9 Please see section F.6. Thermal profile on operating temperature operate in over current mode and will auto recover when 10 Please see section F.2 Powered Device Signature and Class programming for more details the over load condition is removed. www.poweredethernet.com PEM1300 11G-R0-8 (DRAFT) Page 1 of 5 PEM1300 SERIES by Power Over Ethernet PD Module FUNCTIONAL DESCRIPTION F.1. Inputs The PEM1300 is compatible with all IEEE 802.3af compliant Power Sourcing Equipment (PSE) and supports the different power injection options of Data/Signal pair (Mode A) or Spare Pair (Mode B). See Figure 2 Typical System Configuration. As per IEEE 802.3af, it is specified that the PSE does not apply power to the both outputs at the same time i.e. 4 pair injection. (Refer to IEEE802.3af standards for more information). The PEM1300 provides onboard input bridge rectifiers for improved system integration and minimal external components. Figure 2 Typical System Configuration In Mode A Signal Pair injection, the signal lines carry both data and power. In Mode B Spare Pair injection, the Signal pair carries only data, and the spare pair carries power. IEEE 802.3af COMPLIANT POWER POWERED DEVICE (PD) 4 4 SOURCING EQUIPMENT (PSE) + 5 5 SPARE PAIR +/- 1 1 ~ TX RX - + +VDC 2 2 DATA / ~ ~ SIGNAL PAIR DC PEM1300 PSE - + OUTPUT (48V) ~ -VDC 3 3 RX TX 6 6 DATA / SIGNAL PAIR +/- 7 7 - 8 8 SPARE PAIR F.2. Powered Device (PD) Signature and Power Classification When the PEM1300 is connected to a Cat 5e or greater Ethernet cable from an IEEE 802.3af compliant Power Sourcing Equipment (PSE), Endspan or Midspan, it will automatically present a Powered Device (PD) signature to the PSE, as and when requested. The PSE will then recognise that a PD is connected to that line and supply power. With the growing emphasis on Green Power, in the latest standard, IEEE has stressed for PDs to implement the IEEE 802.3af Power Classification system to ensure correct provisioning of power from the PSE. To help in proper power level provisioning and improved power management, the IEEE 802.3af standard provides for PDs to inform the PSE their required power levels via a Class system. The classes are defined as per Table 1 below. The PEM1300 allows for programming the Class by placing a 1/16W or greater and 1% tolerance resistor detailed in Table 1. Table 1 Power Classification programming 1/16W or greater and 1% tolerance resistor between PoE Power Class Required PD Power Pin 4 (VINB ) and Pin 6 (CP2) Pin 5 (CP1) and Pin 6 (CP2) 0 0.44W ~ 12.95W Do not connect Any value 10K to 100 K 1 0.44W ~ 3.84W 280k Do not connect 2 3.84W ~ 6.49W 143k Do not connect 3 6.49W ~ 12.95W 90k9k Do not connect 4 Reserved for 802.3at Reserved Reserved Important : Never connect Pin 4 (VINB-) to Pin 5 (CP1). Do not connect Pins 4 (VINB-) and 5 (CP1) and 6 (CP2) at the same time. Connect Pin 5 (CP1) only to Pin 6 (CP2) and only as per instructions in Table 1. Pin 5 and 6 may be left unconnected for default Class 0 but is not recommended. F.3. Isolation IEEE802.3af section 33.4.1 calls for a Powered Device (PD) to meet safety isolation requirement by meeting the electrical strength test of IEC 60950 sub clause 6.2. Infomarts PoweredEthernet PEM1300 modules meet or exceed 1500V impulse test. This is also referred to as Hi Pot Test, Flash Tested, Withstand Voltage, Proof Voltage, Dielectric Withstand Voltage & Isolation Test Voltage. www.poweredethernet.com PEM1300 11G-R0-8 (DRAFT) Page 2 of 5