Medical Power Supply Requirements

To avoid sourcing custom ac dc power supplies this can be resolved by combining iec 60601 2 x mopp rated dc dc converters with for example an ite 60950 rated ac dc power supply.

Medical power supply requirements.

Medical grade power supplies have been specially designed to meet the iec60601 medical equipment safety standard. They need to understand not only the application but the stringent requirements of the medical standards. Iec60601 rated power supplies must have effective and reliable isolation between the ac input to the power supply the internal high voltage stages and the dc output. The limit values vary depending on the type and nature of the applied part ap that is brought into direct contact with the patient s body.

Based on tdk lambda s modified llc topology these bf rated supplies fit in 1u enclosures and feature 90 to 264 vac input an oring fet 350 to 400 w peak for 10 s and full digital control. Cui s wide range of medical power supplies are certified to the most recent edition of the international safety standard iec 60601 1 edition 3 1 as well as the 4th edition emc requirements for 2 x mopp applications. Power supplies play a critical role in ensuring patient safety with any medical device and must meet strict international standards. Engineers designing power supplies for medical applications have some unique challenges.

There are specific existing and new requirements for medical safety. Philip lechner avnet abacus looks at what s needed for a particular application. The efe300m series from tdk lambda is an example of a power supply that meets all the isolation requirements for the iec60601 1 medical standard. Medical appliances often require various dc voltages for the ap instrument that differ from the main system dc voltage provided.

Any shortcoming in isolation risks electric shock.