Fanless MEGA-brick AC-DC power supplies rated to 1kW

TDK-Lambdavisit website


TDK-Lambda is adding more functionality to its PFE range of AC-DC MEGA-brick power supplies with the introduction of the 1000W PFE-F Series. Like the existing lower power PFE modules, TDK-Lambda's PFE1000F combines the AC to HVDC front-end with DC-DC converter into a single module. In addition, the baseplate-cooled design simplifies the thermal design of the equipment in which they are used. PFE modules satisfy the increasing requirement for fanless high power, especially for outdoor electronics when suitably enclosed.

Up to six PFE1000F units can be operated in parallel, achieving outputs of up to 5.1kW. For use in high-reliability equipment, N+1 redundant-parallel operation is possible. Space savings of 25 per cent are possible with PFE applications compared with previous generations that utilised a two-stage AC-DC front end module and DC-DC backend module. Typical markets include industrial, high-end ATE, quasi-military, traffic signs and cellular infrastructure.

Models in the fully regulated PFE1000F series are available in 12, 28 and 48V nominal outputs and can be adjusted +/-20 per cent. The 12V versions deliver 720W with a maximum baseplate temperature of 100degC, while the 28V and 48V models provide 1008W.

Wide-range AC input

All versions of the PFE1000F series have a wide-range AC input that allows operation from any voltage between 85V and 265V at 47-63Hz. As standard, they incorporate active power factor correction (PFC) and input-to-output isolation of 3000V AC for one minute. Over-voltage, over-current and over-temperature protections are also included.

Further features include remote ON/OFF control, inverter operation good (IOG) signal and an auxiliary power supply for external signals (nominal 12V/20mA). In addition, specific to the telecoms equipment market specifications, the PFE1000F features enhanced circuitry to improve lightning surge withstand capability up to 6kV when installed using recommended reference design.

Supplied in a 100 x 13.4 x 160mm package, the PFE1000F can be conduction-cooled with a cold-plate or forced-cooled with a heatsink. All products in TDK-Lambda's PFE1000F series conform to IEC/EN/UL/CSA 60950-1 safety approvals for general-purpose applications. In addition, the units carry the CE mark according to the Low-Voltage Directive (LVD) and come with a two-year warranty.

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