2,500-W 1U industrial power supplies support PMBus

Oct. 25, 2016

TDK Corp. has announced the introduction of the TDK-Lambda brand RFE2500 AC/DC power supplies. Delivering up to 2,500 W of output power in a low-profile 1U package, the RFE series has rugged screw-terminal and bus-bar connections. These industrial supplies are suitable for use in many applications requiring reliable 12-V, 24-V or 48-V bulk power.

Operating efficiencies of 90 to 93% minimizes waste heat dissipation and eases system cooling requirements. With a universal input of 85 to 265 VAC, applications for the RFE2500 supplies include communications, factory automation, test and measurement equipment, and broadcast/RF amplifiers.

The RFE2500 is fully featured with AC fail, DC good, remote on/off, remote sense, a 12-V 0.5-A auxiliary supply, ±20% output voltage adjustment (by either front panel potentiometer, external resistance, or a 0- to 5-V signal), and overcurrent set-point programming. Up to eight units can be connected in parallel for higher power, and internal ORing FETs allow redundant operation.

The units can operate at full load in ambient temperatures of up to 50°C, and deliver 50% load at 70°C. The case measures 107 x 41 x 345 mm, making it suitable for 1U high racking systems, and the weight is just 2.5 kg. Cooling is provided by two internal temperature-controlled fans to reduce acoustical noise.

Models with a “/S” suffix include an optional I2C/PMBus serial communications port for remote programming of the output voltage and remote on/off. In addition the output voltage, output current, internal temperature, and status signals can be monitored.

Input to output isolation is 3 kVAC, with all models certified to UL/CSA 60950-1, IEC/EN 60950-1 and carrying the CE mark for the Low Voltage and RoHS2 directives. All units meet EN55011/EN55022-B conducted emissions (Class A radiated) and comply with IEC 61000-3-2 harmonics and IEC 61000-4 immunity standards.


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