Single-stage AC-to-DC converter with self-driven synchronous rectification that complies with EN61000-3-2 regulations

When low output voltage and EN61000-3-2 compliance are put together, not too many options can be used, especially if the power range is between 300-600 W. This paper presents one of the best solutions to comply with both specifications at the same time: the use of a single-stage topology to comply with the low-frequency harmonic limits combined with a half-bridge converter with complementary control, which is a very good option to obtain low output voltages with high efficiency.