Regulated converter for POE compliant power from a 12V source

March 11, 2016 // By Graham Prophet
SPC-54/4.4-L12PG-C is a converter Murata designed to deliver isolated 54V Power Over Ethernet (PoE) at up to 240W. This very compact SIP (Single Inline Package) module can power up to nine PoE devices at 25.5W from a 12V source.

The SPC-54/4.4-L12PG-C was developed to deliver power to Ethernet devices over traditional Cat 5 network cables in accordance with IEEE 802.3 PoE requirements. This PoE source module is designed to operate in applications that support a 12V power source, converting 12V to 54V at 240W, to power and support multiple PoE devices.


The circuit architecture provides a 94% efficient, PoE compliant, 54V output. The module provides PoE safety requirement that include input to output isolation at 2,250 Vdc with basic insulation, Over Voltage Protection that meets SELV requirements. The module is packaged in a SIP format to save board space, and to optimise Pout capabilities in demanding applications. 


Advanced thermal management allows 240W of power at 60°C in a very compact package. Total PCB board space required is 67.0 x 8.9 mm. With a Vin range of 10.5V to 13.2V, the SPC-54/4.4-L12PG-C is suitable for resource-efficient, end-to-end information and communications technology (ICT) ecosystems that use PoE devices.


Murata Europe;