AC/DC medical power supplies offer up to 95% efficiency

11th May 2017
Anna Flockett

The new wide input range, single output PQC series of industrial/medical power supplies has been announced by Murata Power Solutions. Rated at 250W of output power, and packaged in an industry-standard open frame 3x5”, 1U footprint, this high-efficiency design can deliver its full output using convection cooling when operating in temperatures up to 50°C.

The PQC series accommodates the universal AC input voltage range from 90-264VAC and with a frequency range from 47-63Hz.

The highly efficient convection cooling design employs optimal thermal management to deliver an energy efficiency rating of up to 95%.

The PQC series currently is available in 12, 15, 18, 24, 36, 48, or 54V single output variants, each with a 5V standby supply as standard. Additional output voltage variants are currently under development including 54V scheduled for a June 2017 release.

Featuring remote enable, the PQC consumes less than 500mW of power in standby mode. These power supplies can continuously deliver full output power across the wide temperature range 0-50°C and up to 70°C (with derating).

The series conforms to medical, consumer, and ITE IEC/EN/UL 60950-1 safety approvals and incorporates 2 X MOPP (Means of Patient Protection) isolation. With an isolation of 4000VAC (input to output) or 1500VAC (input to PE), these units are suitable for powering equipment such as ultrasound monitors, blood pressure monitors, incubators, ECG equipment, and operating tables. EMI compliance is certified to EN55022 Class B conducted emissions.

Where an application requires more power or redundancy, the droop current share characteristic enables two or more power supplies to operate in parallel to increase output current capability and flexibility.

The PQC250 series is less than 1U high and is available in open-frame and with a cover option.

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