PCB mount ac-dc modules for body floating medical

XP Power has created a family of PCB mount ac-dc power modules for BF (body floating) medical applications such as surgical, patient treatment, patient monitoring and dental equipment.

Named MCE, there are four types of single-output PSU in the family: 3W MCE03, 10W MCE10, 20W MCE20 and 40W MCE40.

“All the units are specifically designed for medical applications and carry world-wide medical approvals such as IEC/EN60601, EN61000-4-x for EMC immunity and EN55011 Class B – conducted and radiated – for EMC emissions,” according to the company. “All units offer 2 x MOPP [means of patient protection] isolation and Class II construction with no earth connection.”

To go along with the IEC Class II insulation rating, input to output isolation it rated at 4kVac.

While designed for class II operation, the outputs can be grounded – a additional front-end filter, consisting of an X2 capacitor and a common mode choke, is suggested in this situation to recover EMC performance.

Operation is from 80 to 264Vac, and each type has seven output options: 3.3, 5, 9, 12, 15, 24 or 48V.

There are various deratings amongst the various models for high temperature operation and low input voltage, and maximum power rating is lower than nominal in some 3.3V types.

Efficiency is up to 88% – tending to be lower with lower output voltage, no-load consumption is 300mW, and they can operate over -25 to +70°C.

Protections include over-load, over-voltage and short-circuit.

Size rages from 40.6 x 19.1 x 19.1mm to 87.9 x 38.1 x 28.5mm – this is above the PCB and pin length has to be added to the last dimension. These measurements are for the encapsulated versions (pictured). All are also available in a slightly smaller form without encapsulation (which XP calls ‘open-frame’).

Warranty is three years and they can be obtained via Digi-Key, Distrelec, Farnell, Mouser or RS Components, or direct from XP.

As an example, find the 40W MCE40 product page here