Electrical device including bidirectional switching converter

An electronic device comprising:

• a first transistor configured to connect an input node with a switching node according to a first control signal;
• a second transistor configured to connect the switching node with a ground node according to a second control signal;
• an inductor connected with the switching node and configured to conduct an inductor current, wherein the inductor current increases based on the first transistor being on and decreases based on the second transistor being on;
• an oscillator configured to generate a first signal, based on an error signal representing a difference between a reference level and a level of an input signal applied to the input node;
• a ramp generation circuit configured to generate a ramp signal, based on the first control signal and the second control signal;
• a comparator circuit configured to generate a second signal, based on the error signal and the ramp signal;
• a latch circuit configured to generate a third signal having a first frequency, based on the first signal and the second signal;
• a switching modulation circuit configured to generate a fourth signal having a second frequency which is less than the first frequency;
• and
• a controller configured to generate the first control signal and the second control signal, based on the fourth signal.

A method of controlling a bidirectional switching converter including a switching node, the method comprising:

• generating a first signal having a first frequency;
• controlling the first frequency based on a level of a load current;
• generating a second signal having a second frequency;
• controlling the second frequency to 1/N times the first frequency, while the first frequency is within a reference frequency range, wherein N is a natural number greater than or equal to 2;
• controlling the second frequency to be equal to the first frequency, while the first frequency is outside the reference frequency range;
• and
• turning on a first transistor to precharge the switching node or a second transistor to discharge the switching node, based on the second signal.