A high-reliability, low-cost, interleaved bridge converter

The interleaved bridge topology uses two transformers in series to act as both inductor and transformer, allowing zero-voltage resonant transition switching for high-frequency, low-loss operation. High frequency reduces the requirement for large filter capacitors and reduces the size of the magnetics. Costs are reduced by trading electrolytic capacitors for ceramic capacitors, which also improves reliability. Costs are also reduced by eliminating gate driving isolation transformers and snubbers. Experimental results compare favorably with previous designs and costs. Both cost and reliability concerns are discussed