Date: 24/06/2012

Digitally controlled 300-400W power supplies from TDK-Lambda for medical applications

TDK Corporation has announced that the new TDK-Lambda CFE400M series are now available. These new digitally-controlled, 300 to 400 watt single output, medical power supplies are available in convection and fan cooled versions. The devices combine a 4kVac reinforced input-to-output isolation with dual fusing and an output-to-ground isolation of 1500Vac.

The CFE400M is rated at 300W for operating temperatures from 0°C to +40°C (250W to +50°C) when convection cooled (without fans). The power supply is rated at 400W from 0°C to +50°C when fan cooled with either an integral quiet fan or customer forced air (1.5 m/s). These units have a 450W peak power rating for up to 10 seconds for both cooling options.

The power supply is available in field-adjustable 12V, 24V and 48Vdc versions with a 12Vdc / 0.25A fan supply. The CFE400M has a 5V/80mA standby output or a 5V/2A option. The 5V/80mA option meets the ErP Directive with less than 0.5W standby power consumption. All models meet or exceed the Climate Savers Gold Level. The device features efficiency of 94% typical, remote On/Off and remote sense and comes in a size of 7.0 x 3.94 x 1.6 inch.

They find their applications in medical/dental equipments and other high integrity applications such as laboratory, process controls, ATE, automation, broadcast, instrumentation, routers, servers and security networks.

The zero-voltage-switching (ZVS) resonant converter on the output stage reduces switching losses and noise, improves EMC, and enhances overall efficiency. The microprocessor within the CFE400M controls the output of the resonant converter as well as the current limit and peak current operation, which enables the supply to provide power to inductive as well as capacitive loads. The micro also controls housekeeping routines, such as controlling the timing to turn power on/off and monitoring the PFC section.

All models in CFE400M range are certified to IEC/EN/UL/CSA 60950-1 Edition 2 for general-purpose applications, IEC/EN/UL/CSA 60601-1 Editions 2 & 3 for medical equipment, and meets IEC/EN/UL/CSA 61010-1 Edition 2 for laboratory and process control applications. The units are CE marked to the LV Directive and come with a 5-year warranty.

The CFE400M power supplies are available now at a price of $236.20 each in quantities of 100 units.

Datasheets: http://www.us.tdk-lambda.com/lp/products/cfe-series.htm