Power Electronics
With the OFM22539s power factor correction isolation and regulation all combined in one conversion step the component count stays below 120 This contributes to an efficiency of 93 zero load power of 500000h Image courtesy of Powerbox

With the OFM225's power factor correction, isolation and regulation all combined in one conversion step, the component count stays below 120. This contributes to an efficiency of 93%, zero load power of 500,000h. (Image courtesy of Powerbox).

Continuous 225W at Natural Convection from Medical Type BF Power Supply

In a 3 x 5" footprint and 1.5" height, the new OFM225 from Powerbox provides continuous output power of 225W at natural convection and 40ºC ambient temperature, increasing to 325W continuous at 12 CFM forced air cooling. Several units can also be operated in parallel with load sharing. Intended for type BF applications, the unit can withstand 4000VAC from input to both output and ground.

Using Powerbox' one step conversion topology, where power factor correction, isolation and regulation are combined in one conversion step, the component count stays below 120. This contributes to an efficiency of 93%, zero load power of 500,000h. Over voltage protection, as well as over current and short circuit protection with auto recovery, adds to operational reliability which is further enhanced by intelligent over temperature protection regulating output power in the case of over temperature.

In addition to increased life expectancy, this functionality increases the sustainability to short-term overload and reduces the risk of over temperature shut down. With a nominal input voltage of 100-240V 50/60Hz and available output voltages of 12, 15 and 24VDC (12 and 15VDC to be released later this year) the new power supplies fit nicely into a large number of medical applications worldwide.

Medline 225 OFM225 series meets, among others, safety standards IEC 60601-1 and 60950-1, EMC IEC60601-1-2, IEC61204-3, and EN55011 Class B, including corresponding North American versions. It also meets environmental RoHS, REACH and WEEE. 

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