Bisection zero current tracking circuit and method for boost converter

The invention discloses a dichotomy zero current tracking circuit and method for a boost converter. The circuit comprises an output voltage stabilization calibration module, a reverse current detection module, a shift adder module and a duty ratio modulation module which are connected in sequence. The reverse current sensing module senses and compares the voltages at the two ends of the high-side power switch tube, and excites a high-order register or a low-order register in the shift adder module according to a comparison result; the shift adder module outputs a four-bit control signal SW4SW3SW2SW1 through a bisection method according to a comparison result of the reverse current sensing module; the duty ratio modulation module is used for generating a duty ratio control signal matched with the conduction time of a high-side power tube of the boost converter according to the four-bit control signal output by the shift adder; and the output voltage stabilization calibration module compares the output feedback