Half-brick power module for PoE
14 November 2012
Power Electronics / Power Management
Murata has designed its EMH-54/3-Q48N-C power module specifically for Power-over-Ethernet (PoE) applications. The device provides a 54 V SELV output, 2250 V d.c isolation and a basic insulation system meeting the requirements for multiport IEEE 802.3at (PoE+) applications.
The EMH-54/3-Q48N-C can deliver 30+ W of power at 54 V to each of four PoE+ Ethernet ports or can deliver up to 162 W to loads requiring 54 V. It was specifically designed for use in applications requiring a wide operating voltage range such as battery-powered systems (24 V, 48 V or 60 V) and wireless base-station applications.
The module accommodate a Vin range of 18 to 72 V d.c for applications across all regions of the world. It can be mechanically configured to operate in applications that require forced air cooling or ‘sealed box’ applications, by offering an open-frame module for forced air cooling or adding an optional baseplate for mounting a heatsink or for conduction cooling in a sealed box application.
This multipurpose DC-DC converter delivers 54 V @ 3 A over a wide operating input voltage range of 18–72 V with efficiencies up to 91,5%. It conforms to the industry standard DOSA half-brick package measuring 58,4 x 61 x 12,7 mm. Added protection features include input under-voltage lockout, output current limiting, short circuit protection and thermal shutdown.
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