Multiple output push-pull converter with post regulated buck converters

Switched Mode Power Supplies (SMPS) play a vital role in the field of Power electronic systems. They can be found to be in use in a variety of power processing applications, ranging from lower power applications such as on-chip power management to high power applications such as power systems. In this paper, a multiple output push-pull DC-DC converter is designed and simulated. The power module can supply multiple voltage levels from an input battery. Among the multiple outputs, the Master output or the output with the maximum voltage will be fed back directly using closed loop compensation circuitry. The feedback line will be isolated to maintain a complete galvanic isolation between primary and secondary sides of the circuit. The slave outputs or the lesser voltage outputs will be post regulated using buck converters. The design of the circuit elements for the post regulated buck converters will be done with help of the tool LTpowerCAD. The simulations were done in LTSpice environment. The simulation results show that a stable output is obtained across all the three output ports.