Control device for a switching converter and related switching converter

A switching converter having an input terminal and an output terminal, said converter comprising a semi-bridge of a first and second transistor coupled between the input terminal and a reference voltage, said converter comprising:

• a control device including a first circuit for driving said first transistor and a second circuit for driving said second transistor;
• and
• a bootstrap circuit for powering said first drive circuit, said bootstrap circuit comprising a capacitor coupled between a supply voltage and a common terminal of said first and second transistor, wherein said control device comprises a first counter and a second counter, said first counter operative for increasing its count by one unit per switching cycle in which said second transistor is not switched on and said second counter containing a pre-established value, and a comparator for comparing the value of the first and second counter and operative to switch on said second transistor in response to said comparison for a predetermined period of time.

A switching converter having an input terminal and an output terminal, said converter comprising a semi-bridge of a first transistor and second transistor coupled between the input terminal and a reference voltage, said converter comprising:

• a control device including a first circuit for driving said first transistor and a second circuit for driving said second transistor;
• and
• a bootstrap circuit for powering said first drive circuit, said bootstrap circuit comprising a capacitor coupled between a supply voltage and a common terminal of said first and second transistor, wherein said control device comprises a first counter, a second counter, and a comparator for comparing the value of the first and second counters and operative to switch on said second transistor in response to said comparison for a predetermined period of time.