Zero current detection circuit and boost type power converter employing the same

A boost type power converter comprising:

• a main inductor;
• a low-side power switch configured to regulate charging of input power into the main inductor;
• a high-side power switch configured to regulate discharge of power charged in the main inductor to a load;
• an on-time generator configured to generate a control signal for the low-side power switch;
• an off-time generator configured to generate a control signal for the high-side power switch;
• and
• a zero current detection circuit configured to output a zero current detection signal to the on-time generator,
• wherein the zero current detection circuit comprises:
• a plurality of dynamic comparators each configured to receive a voltage of the low-side power switch at a first input terminal thereof and to receive a voltage of the high-side power switch at a second input terminal thereof;
• a clock generator comprising a plurality of flip-flops each configured to receive, as a clock signal, an output of one of the dynamic comparators and to output an output signal thereof as a clock input of another one of the dynamic comparators such that entirety of the plurality of flip-flops constitutes a clock loop;
• and
• an output generator configured to logically OR outputs of the plurality of dynamic comparators, thereby outputting a resultant signal to the off-time generator.