ginngi engineering

Our customer was designing an Ethernet based video encoder and needed an efficient POE (Power over Ethernet) solution. Existing POE modules were not sufficient because they used input voltages of 45 V from the line whereas our system also needed to interface to standard 12-24V adapters. A POE module could be used but this would then require another regulator to interface to the 12-24V adapters. So a proprietary solution was needed.

The main challenge was to provide a standards compliant Ethernet interface to receive the base DC voltage both from the line and from the adapter input. Existing regulator chips for POE supported input voltages down to only 18V instead of the required 12V. So a proprietary design was implemented that supported the entire range from 12V to 48V, which saved the need for the extra regulator.