PEM1405

PEM1400 SERIES by Worlds Smallest Power Over Ethernet PD Module PRODUCT OVERVIEW The PEM1400 is a compact sized power extraction module, with complete IEEE 802.3af Power-Over-Ethernet (PoE) standard compliance. They are designed to extract power from CAT5 or higher Ethernet cable when sourced from an IEEE 802.3af compliant Power Sourcing Equipment (PSE). 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 PEM1400 series provides a quick, easy, and low cost method for Ethernet equipment manufacturers to PoE enable their equipment. With size of 35mm x 14mm, and a footprint of 409 mm, the PEM1400 is the worlds smallest POE Module. PRODUCT FEATURES Fully IEEE 802.3af compliant Stable efficiency even at high ambient Adjustable output voltage 1 12.95 watt output load On board PI filter for output ripple control RoHS compliant 2 Wide input voltage (36V to 57V DC) Overload and short circuit protection Low output ripple and noise Full Power start up even from 36V input Minimal external components required Low cost 5V, 12V DC output voltage models 1500 Volt DC isolation (Input to Output) Frequency Dithering Compact dimension of 35mm x 14mm PRODUCT SELECTOR Nominal Input Power 3 4 Output Voltage Efficiency 7,10 Voltage (Maximum) Part Number Marking (Volts DC) (Volts DC) (%) (Watts) PEM1412 12 48 12 87 12.95 PEM1405 05 48 5 85 12.95 PEM1403 03 48 3.3 80 12 INPUT CHARACTERISTICS 4 Parameter Symbol Min. Typ . Max. Units 5 Input Voltage V 36 48 57 Volts IN Under Voltage Lockout V 30 36 Volts UVLO 6 Input Current IIN 350 400 mA 7 O Operating Temperature TOP -20 25 70 C 8 IEEE 802.3af Power Classification Class 0 1 In 5V and 12V model 2 If maximum power is exceeded, the PEM1400 will operate in over current mode and will auto recover when the over load condition is removed. 3 0 Output voltage typical 3% at T of 25 C with a nominal input voltage, rated output current and typical connections. A 4 At nominal VIN at 67% load. 5 With minimum load 1Watt or 100mA, whichever is higher 6 Please refer to IEEE802.3af standards document. Maximum input current is dependent on power class, and input voltage. Input current (DC or RMS) at V =37vDC is 350mA, at V =57vDC is 230mA. Peak inrush current is 400mA for 50mS max at duty cycle of 5% max. PORT PORT 7 Please see section F.7. Thermal profile on operating temperature 8 Please see section F.4 Powered Device Signature www.poweredethernet.com PEM1400 17ER1-4 Page 1 of 7 PEM1400 SERIES by Worlds Smallest Power Over Ethernet PD Module DC OUTPUT CHARACTERISTICS 4 Parameter Symbol Min. Typ . Max. Units Line Regulation V 0.2% LNRG Load Regulation V 0.5% LDRG 9 Output Ripple and Noise VRIP 80 mV p-p Isolation Voltage V 1500 V DC ISOL O Temperature Coefficient (Slope) TC 100 300 ppm C 9 10 ABSOLUTE MAXIMUM RATINGS , Supply Voltage (V ) 0V 57V DC CC O O Storage Temperature (TS) -25 C 100 C Output Voltage (V ) 0V to controlled output voltage (operating or non-operating) OUT Figure 1 - BLOCK DIAGRAM and TYPICAL CONNECTIONS ADJ PEM1400 ~ ~ +VDC Input + - +VDC VIN+ ~ ~ IEEE DC 802.3af ~ + DC-DC ~ Output Signature C1 Converter Input - + and 470uF Control Low ESR ~ ~ VIN- -VDC -VDC (Optional) C2 Safety Capacitor (for EMI tuning) FUNCTIONAL DESCRIPTION 1. Pin Connections INPUT PINS OUTPUT PINS VIN+. This pin connects to the positive (+) output of the +VDC. This pin provides the regulated output from the DC/DC 1 3 input bridge rectifiers converter. Max. Current 3A per pin. OADJ. The output voltage can be adjusted from its nominal VIN-. This pin connects to the negative (-) output of the value, by connecting an external resistor from this pin to either 2 4 input bridge rectifiers +VDC pin or -VDC pin. For more details please see section F.4. To maintain isolation integrity, always connect respective input and output poles only via X or Y safety capacitor. -VDC. The ground return for +VDC output. Max. Current 3A per 5 Maintain isolation barrier on motherboard PCB as per pin. physical package. 2. Inputs The PEM1400 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 PEM1400 provides for external input bridge rectifiers for improved system design flexibility, and distribution of heat generation. As an example, a system designer wanting to provide two RJ45 inputs, both of which are PoE enabled, but use only one PEM1400 module to save costs. Another advantage is that this allows the system designer to control the type and costs of the input rectification diodes. 9 0 All specifications typical are at T of 25 C with a nominal input voltage, rated output current and typical connections, unless otherwise noted. A These are meant as a design aid only and are indicative, and not guaranteed. 10 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. www.poweredethernet.com PEM1400 17ER1-4 Page 2 of 7 SMAJ58A (ESD Protection)