A Galvanic Isolated Full Bridge Rectifier with Adaptive Zero Current Control

Abstract

This paper proposes a galvanic isolated full-bridge rectifier that utilizes an adaptive zero current detection (ZCD) method to eliminate the diode drop and reverse current. The rectifier is designed and simulated using a 0.18µD BCD process with an active area of 0.64 mm2. The simulation results demonstrate that the adaptive zero current detection can significantly reduce reverse current and improve transmission efficiency. With a load of 75mA, the circuit achieves a transmission efficiency of 92%. which is 12.3% higher than that of a diode full-bridge rectifier.