Medically approved DC:DC converters

Gresham Power Electronics is making available two new series of DC-DC converters from Polytron Devices approved for use in medical applications including equipment and devices used in close proximity to patients.

Both series are in the industry standard miniature DIP Package and provide a regulated 3 watt output with the TWA3/MHI featuring a 2:1 wide input voltage range while the TWB3/MHIA5 Series has an ultra-wide 4:1 input voltage range. Both also provide regulated single or dual output voltages over the range 3.3 to 24VDC or +/-5 to +/15VDC and have input voltage options from 4.5 to 72VDC.

Polytron DC-DC converters can be supplied for through-hole printed circuit board mounting or surface mount form for automated assembly.

Standard features include, high efficiency up to 89%, operating temperature range -40 to +1050C (with derating), reinforced insulation, clearance and creepage distance 8.0 mm/2MOPP, 5000VAC input to output 2MOPP Isolation, 2µA patient leakage current, built-in EMI Class A filter, medical safety approvals including: UL, CE and ANSI/AAMI ES60601-1, EN60601-1 and IEC60601-1, ROHs Compliant to 2011/65/EU.

Typical applications for the TWA3/MHI and TWB3/MHIA5 Series of DC:DC converters include diagnostic and therapy equipment, home equipment including nebulizers and blood pressure monitors as well as a broad range of medical devices including: X-ray machines, surgical tools with lights, lasers and video microscopes, defibrillators, medical devices and equipment.

Neil Tyler