TDK-Lambda has introduced the RFE1000 series; a new 1kW embedded 1U high single output AC-DC power supply for stand alone and distributed power architecture (DPA) applications requiring reliable 24V, 32V and 48V bulk power. Up to 20% output voltage adjustment is possible enabling the RFE1000 to be used in a variety of customer specific applications including battery charging. Operating from a universal input of 85 to 265VAC, typical applications for the RFE1000 supplies include communications, factory automation and RF amplifiers. Efficiency up to 89% minimises heat dissipation.
The RFE1000-24 ,-32 and -48 power supplies can be used individually or up to 8 units can be connected in parallel to form an N+1 redundant power system with optional OR’ing diodes. Each power supply has variable-speed cooling fans and can operate in temperatures ranging from 0 to +70°C. The RFE has a power density of 10.5W/in3 with dimensions of 305 x 127 x 41mm. AC input is via a terminal block and DC output is via M5 studs. Auxiliary outputs are via a JST type 12-way connector.
Over voltage, over current and over temperature protection are standard features, and for system monitoring there are opto-isolated signals for DC OK, AC fail and over temperature warning with a rear panel LED indicator for DC OK. Remote on/off control is also standard, as is remote sense. Other standard features include single-wire current sharing and an auxiliary 12V 0.25A output with built-in OR’ing diode.
As well as being EN55022 and FCC compliant (achieving class B conducted and radiated emission), the RFE1000 series meets UL/EN 60950-1 safety approvals and carries the CE mark. Harmonic correction meets the EN61000-3-2 standard, and the power supplies are backed by a two-year warranty.