Patent ID: 8866462
Filing Date: 2014-10-21
Classification: H02M

Abstract:
1. A minimum energy point tracking buck converter comprising an output unit and a regulating unit, an input voltage chopped by the output unit of switching power supply circuit into pulses that are transferred to a load, the regulating unit senses and regulates the output voltage, the regulating unit including a current limit block, a digital control block and a DAC, a comparator comparing an output voltage and an output reference voltage, the comparator having an output and clock signal connected as inputs of an AND gate, the AND gate having an output connected as an S port of a RS trigger and an input of the digital control block the digital control block having a first output that determines an ON time by controlling the current limit block, the digital control block having a second output that determines the output reference voltage with the DAC, a first inverter connecting an OR gate to an output of the current limit block, and a second inverter connecting the OR gate to a maximum duty cycle signal, the OR gate having an output connected to an R port of the RS trigger.