JAJU819B April 2021 – June 2021
In the system, there are four MOSFET switches (Q1-Q4) that form a full-bridge on the HV side of the isolation transformer and two MOSFET switches (Q5-Q6) on the center-tapped LV side that work as synchronous rectifiers.
Phase shift between PWM signals driving the two legs of the full bridge determines the amount of energy transferred to the load. Controlling such a system in PCMC mode requires generating complex PWM drive waveforms along with fast and efficient control loop calculations. This is made possible on C2000 microcontrollers by advanced on-chip control peripherals like PWM modules, analog comparators with DAC and slope compensation hardware and 12-bit high speed ADCs coupled with an efficient 32-bit CPU. A detailed description of the software algorithm is provided in the following chapters.