  Resonant converters are often being used for high power and high voltage
applications to achieve high efficiency, high power density and low EMI. In
this paper, we will use a resonant converter for a completely different
application. We will take advantage of the Zero Voltage Switching (ZVS) and
operating in the vicinity of the series resonance to design a low power and
ultra-low noise galvanic isolated half bridge resonant DC-DC converter for
powering a medical amplifier. Under lower power we consider up to 6W (500mA @
12V). The DC-DC converter must meet the safety requirements of the standard IEC
60601.
