An improved single switched post regulator for multiple output isolated converters

This paper presents a new high accurate single switched post regulator with voltage-doubler characteristic. The proposed post-regulator requires only one auxiliary switch compared to the bulky and expensive non-isolated DC/DC converter. Moreover, the added voltage-doubler can tightly regulate the slave output current. In addition, the proposed post-regulator can improve EMI characteristics and reduce switching losses due to the ZCS operation of all power switches. Finally, in order to verify the validity of the proposed converter, experimental results from a prototype applicable to the 48” LED 3D TV power supply are presented.