Medical power supplies offer low acoustic noise

TDK Corporation has introduced the CUS1500M series of 1500W rated AC/DC power supplies, extending their 30W to 350W CUS-M range. With medical and ITE certifications, these seven-year warranty products offer low acoustic noise (<45dBA) and meet class B radiated and conduction EMI standards. These high power models are aimed at use in medical and scientific equipment needing low audible noise for patient and operator comfort. The series operates from a wide-range input of 85VAC to 265VAC with an earth leakage current of <300µA, and can be used in ambient temperatures of -20C to +60C, derating linearly above 50C to 60% load at 60C. A variable speed fan provides low acoustic noise. The units are offered with 12V, 15V, 24V, 36V and 48V outputs, adjustable by -15/+20% (48V:-15/+10%) to accommodate non-standard voltages. The units are safety certified to IEC/EN/ES/CSA 60601-1, IEC/EN/US/CSA 60950-1 (IEC 62368-1 pending), EN 62477-1 (OVC III), with CE marking for the Low Voltage, EMC and RoHS2 Directives. Input to output isolation is 4,000Vac (2 x MoPP), input to ground 2,000Vac (1 x MoPP) and 1,500Vac output to ground (1 x MoPP) for suitability with B and BF rated equipment. The units also comply with EN 55011-B, and EN 55032-B conducted and radiated emissions, meet the EN 61000-3-2 harmonics and EN 60601-1-2 (Edition 4) immunity standards.