EET
Medical, ITE power supplies feature five-year warranty

Medical, ITE power supplies feature five-year warranty

TDK-Lambda Americas announces the extension of its warranty for digitally-controlled 300 to 400 W EFE series power supplies from three to five years. Models in this series are certified to medical and ITE safety specifications.

The EFE300-400M series features a 4 kVac reinforced input-to-output isolation and an output-to-ground isolation of 1,500 Vac. The series meets the rigorous international safety standards of IEC/UL 60601-1 for medical equipment, making it suitable for use in B (body) and BF (body floating) type medical and dental applications. Regulated dc outputs of 12 V, 24 V, or 48 Vdc are standard, and other voltages can be provided.

With a 3 x 5 in. (300 W) or 3.5 x 6.5 in. (400 W) footprint and less than a 1 U profile (1.34 to 1.60 in.), the EFE300-400M can be used in designs where space is limited so the final product can be smaller and cooler. Other features such as a redundant operation capability, a standby voltage output, and ITE safety certifications per IEC/UL 60950-1 make the EFE300-400M equally suitable for high-integrity applications such as broadcast, instrumentation, routers, servers, security networks, ATE, and factory automation.

The EFE400M delivers 400 W continuous power and up to 475 W peak for 10 seconds. And, non-standard output voltages can be accommodated easily by precise factory programming. An additional 12 V/1 A fan output is included and all models operate from a universal 90 to 264 Vac input with dual-input fusing as standard. Earth leakage current is less than 300 µA at up to 264 Vac, fully complying with international medical safety requirements.

EFE300-400M units are approved to IEC/EN/UL/CSA 60601-1 for medical and dental applications, IEC/EN 61010-1 for laboratory and process control applications, and IEC/EN/UL/CSA 60950-1 for ITE/general purpose applications. In addition, the unit carries the CE mark according to the LV Directive. The EFE400M is available in two configurations including open frame or U chassis with an optional cover and temperature-controlled fan.

The EFE-300 delivers 300 W continuous power (400 W peak for 10 seconds) with nominal outputs of 12 V/25 A or 24 V/12.5 A, and the EFE-400 delivers 400 W continuous power (530 W peak for 10 seconds) with nominal outputs of 12 V/33.3 A or 24 V/16.7 A. EFE300-400 series are approved to IEC/EN/UL/CSA 60950-1 for general purpose applications and IEC/EN 61010-1 for laboratory and process control applications. In addition, the units carry the CE mark according to the LV Directive and are RoHS compliant.

All EFE series supplies include an integrated magnetics transformer (transformer and inductor windings on the same core) to boost efficiency to typically 90% and employ an 8-bit microcontroller for full digital control of the output and to handle housekeeping routines. This results in a 25% parts count reduction to achieve a 45% smaller and up to 56% lighter design compared to similar products. All models can be factory programmed to accommodate non-standard system voltages. An additional 12 V fan supply output is also available and all models operate from a 90 to 264 Vac input. Active power factor correction ensures EN61000-3-2 compliance. Other EMC improving design features, such as the use of SiC diodes, ensure Curve B EMC performance with a significant margin.

The design of the EFE series allows the power supply’s performance, such as current limit and start-up characteristics, to be optimized digitally. This feature eliminates the hardware changes usually required in analog designs. A reduced cost primary side control topology is employed, supervised by the microcontroller. This results in fewer parts and higher efficiency without sacrificing load regulation performance.

For more information, contact TDK-Lambda Americas Inc., 3055 Del Sol Blvd., San Diego, CA 92154. Phone: (800) 526-2324.


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