PEM1512A-42

PEM1500A / PEM1500C SERIES by Self contained Power Over Ethernet PD Module PRODUCT SELECTOR Output Power 4 Efficiency 3 7 Voltage (Maximum) Part Number Marking Feature (%) (Volts DC) (Watts) Without remote PEM1505A-42 5A 5 82 10 shutdown Without remote PEM1512A-42 12A 12 84 12.95 shutdown With built in PEM1505C-42 5C 5 82 10 remote shutdown With built in PEM1512C-42 12C 12 84 12.95 PRODUCT OVERVIEW remote shutdown 5 6 The PEM1500 series of power extraction ABSOLUTE MAXIMUM RATINGS , modules, have complete compliance with the Supply Voltage (VCC) 0V 57V DC IEEE 802.3af Power-Over-Ethernet (PoE) standard, and are designed to extract power from O O Storage Temperature (T ) -25 C ~ 100 C S CAT5 Ethernet cable when sourced by a IEEE Output Voltage (VOUT) 0V to controlled output voltage (operating or non-operating) 802.3af compliant Power Sourcing Equipment (PSE). INPUT CHARACTERISTICS The PEM1500 series Powered Device (PD) 4, 5 Parameter Symbol Min. Typ . Max. Units modules provides full PoE signature and power 7 classification as required by the PSE for granular Input Voltage VIN 36 48 57 Volts power management. Under Voltage Lockout V 30 36 Volts UVLO Its high efficiency DC-DC converter provides a 8 O Operating Temperature TOP -20 25 70 C well regulated low noise and low ripple output 9 802.3af Power Classification Programmable Class 0, 1, 2, or 3 with in-built overload and continuous output short-circuit protection. The PEM1500 series provides a quick, easy, and DC OUTPUT CHARACTERISTICS low cost method for Ethernet equipment 4, 5 Parameter Symbol Min. Typ . Max. Units manufacturers to PoE enable their equipment, and removes the need for a local equipment Line Regulation VLNRG 0.2% power source, significantly reducing installation Load Regulation VLDRG 0.5% costs. 5 Output Ripple and Noise V 80 mV p-p RIP PRODUCT FEATURES Isolation Voltage VISOL 1500 V DC Remote shutdown, simple Aux. power O Temperature Coefficient (Slope) TC 100 300 ppm C Continuous short circuit protection 1500 Volt DC isolation (Input to Output) Figure 1 - BLOCK DIAGRAM and TYPICAL CONNECTIONS 1 Overload protection No external components required VA1 PEM1500 ~ OADJ ~ 2 VIN+ 13 watt output load Input + - +VDC Compact package minimum PCB footprint ~ VA2 ~ IEEE VB1 5V, 12V DC output voltage models 802.3af DC ~ + DC-DC ~ Signature Output Converter + IEEE 802.3af compliant Input - and Control VB2 ~ IEEE Power Classification ~ VIN- -VDC Wide input voltage (36V to 57V DC) RoHS compliant Low output ripple and noise 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. 1 If maximum power is exceeded, the PEM1500 will 7 With minimum load 1Watt or 100mA whichever is higher operate in over current mode and will auto recover when 8 the over load condition is removed. Please see section 8: Heat Generation. 2 9 In 12V model Please see section 2: Powered Device Signature and Classification for more details. www.poweredethernet.com PEM1500 12I-R0-9 Page 1 of 6 (ESD Protection) PEM1500A / PEM1500C SERIES by Self contained Power Over Ethernet PD Module FUNCTIONAL DESCRIPTION 1. Inputs The PEM1500 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). 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. POWERED DEVICE (PD) IEEE 802.3af COMPLIANT POWER 4 4 SOURCING EQUIPMENT (PSE) + 5 5 SPARE PAIR +/- VINA1 VINB1 1 1 ~ PEM1500 TX RX - + +VDC 2 DATA / 2 ~ ~ SIGNAL PAIR DC PSE - + OUTPUT (48V) ~ 3 3 VINA2 VINB2 -VDC RX TX 6 6 DATA / SIGNAL PAIR +/- 7 7 - 8 8 SPARE PAIR 2. Powered Device (PD) Signature and Classification When the PEM1500 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. To help in proper power level provisioning and improved power management, the IEEE 802.3af standard provides for PoE powered devices to inform the PSE the required power levels via a Class system. The classes are defined as per Table 1 below. The PEM1500 allows for programming the Class by placing a 1/16W or greater and 1% tolerance resistor as detailed in Table 1. Resistance values shown are indicative. Due to variable resistance of wire on the input connector, fine tuning is required to get the overall specified resistance. Power classification can be tested and verified as per the test set up detailed in Section 9. Required I (Classification Current) values are given in table 1. CL Table 1 Power Classification programming I Connect resistor between CP1 and CP2 pins PoE Power CL Required PD Power Class 1/16W or greater power and 1% or better tolerance (VIN = 14.5V to 20.5V) 0 0.44W ~ 12.95W Do not connect 0mA ~ 4mA 1 0.44W ~ 3.84W 280k 9mA ~ 12mA 2 3.84W ~ 6.49W 143k 7mA ~ 20mA 3 6.49W ~ 12.95W 90k9 26mA ~ 30mA 4 Reserved for 802.3at Reserved Reserved Never connect Pins 1, 2, 3 and/or 4, to Pins 5, and/or 6. 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 PEM1500 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 PEM1500 12I-R0-9 Page 2 of 6