TDK-Lambda has expanded the HFE series of 1U high, single-output AC-DC hot swap, front end power supplies with the addition of 2,5 kW models. Offering power density of 1,77 W/cm³, the power supply is equally well suited for 2,5 kW bulk power and distributed power architecture (DPA) applications. All models feature full current sharing capabilities and internal ORing MOSFET for isolation to support hot swap and redundancy applications such as those found in servers, datacom, data storage, communications, broadcast, military (COTS), medical, process control and industrial automation.
Operating from a universal 85 to 265 V a.c. input, the HFE2500 features efficiency of up to 93% and up to ±20% output voltage adjustment. Output voltage is programmable by resistance, external voltage or optional PMBus compatible I²C communication interface. Output current is external voltage or optional PMBus programmable.
The HFE2500-12, -24 and -48 power supplies, with dimensions of 325 x 107 x 41 mm, can be used individually or up to four units can be mounted into a dedicated 1U rack delivering 10 kW. A total of eight units can be configured in parallel to form a hot swap N+1 redundant power system with single-wire current sharing. A keying system prevents misinsertion of modules into adjacent racks of differing voltage. Each power supply has variable-speed, temperature-controlled cooling fans and can operate in temperatures ranging from -10°C to +70°C.
Over-voltage, over-current and over-temperature are standard protection features. For system monitoring, there are signal returns for DC OK, AC fail, over-temperature and PS exist. Remote ON/OFF control and remote sense are included. Monitoring is also available via the optional PMBus compatible I²C interface and includes a fan fail alarm.
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