Abstract:
Peak current mode control of a buck-boost converter along with the load and transient analysis using a PIC microcontroller is done. The new elucidation includes a discrete time controller using digital slope compensation technique which removes all the sub-harmonic oscillations using a discrete staircase ramp. Combining a digital controller with peak current control gives a number of benefits which is implemented by a new single chip solution with on chip comparators without any external analog ICs. Digital slope compensation is implemented within the PIC controller as a digital staircase ramp using the on board modules.
Keywords: DC–DC switch mode power supplies (SMPS), peak current mode control, digital slope compensation, transient analysis and load variation.