Power supplies provide industry leading power density says TDK-Lambda
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TDK-Lambda UK has expanded its HFE series of 1U high single output ac/dc hot swap front end power supplies, with the addition of 2.5kW models, offering what it describes as industry leading power density of 29W/in3.
The HFE2500 power supply is suitable for 2.5kW bulk power and Distributed Power Architecture (DPA) applications.
All HFE2500 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.
The supplies operate from a universal 85 to 265Vac input and feature high efficiency of up to 93%, which is designed to minimise heat dissipation and power consumption. According to TDK-Lambda, up to ±20% output voltage adjustment is possible, enabling the HFE2500 to be customer set according to specific needs. Output voltage is programmable by resistance, external voltage or optional PMBus compatible I²C communication interface. Output current is external voltage or optional PM bus programmable.
The HFE2500 12, 24 and 48 power supplies, with dimensions of 325 x 107 x 41mm, can be used individually or up to four units can be mounted into a dedicated 1U rack delivering 10kW. 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 mis-insertion 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 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.
The power supplies comply with EN55022 and FCC part 15 Class A radiated and Class B conducted emissions and meet IEC61000-4-2, -3, -4, -5, -6, -8, and -11 immunity. The units are safety approved to EN/UL 60950-1 edition 2 with CE mark.
