Electronics Weekly
XP Power’s CCR range of ac-dc power supplies is rated for BF (body floating) medical use from 110W to 420W.
With a 25.4mm profile, there are three difference sizes, where each device has three different power ratings depending on how it is cooled: by forced air, by base-plate conduction or by natural convection:
- CCR200 79x58mm, 200W fan, 170W conduction, 110W convection
- CCR300 104x58mm, 300W fan, 250W conduction, 160W convection
- CCR420 129x84mm, 420W fan, 350W conduction, 280W convection
Input range is 85 to 264Vac (power factor >92% at 230Vac full load), and there are various single output rail options: 12, 15, 24, 28, 30, 36, 48 or 54V – except there is no 36V CRR300 option.
Efficiency can reach 92 to 94.5%, depending on the exact unit, and operation is over -40 to +80°C with various derating values – loosely below 115Vac and above +50°C (see the data sheets for exact values). For conduction cooling, maximum baseplate temperature is 95°C (measured at the centre) – although some components remain air-cooled as they are not thermally bonded to the baseplate.
For medical applications, they are compliant to IEC60601-1 Edition 4, with primary to secondary isolation at 4,000Vac (2x MOPP – means of patient protection) and 1x MOOP (means of operator protection) 1,800Vac primary-to-earth and 1,500Vac secondary-to-earth.
“Combined with <300µA earth leakage and <75µA patient leakage currents, the CCR range is ideal for integration into BF [body-floating) rated medical devices,” said the company, which is also promoting it for industrial use. “Featuring Class B conducted and radiated emissions, the CCR range eliminates the need for external filtering.”
Protections include over-voltage, over-load, short-circuit and over-temperature.
Data sheets:
CCR200
CCR300
CCR420
They are available from Avnet Abacus, Digi-Key, Distrelec, Farnell, Mouser, RS, TME, approved regional distributors and direct from XP Power with a 3-year warranty.
