Switch control circuit and buck converter comprising the same

A switch control circuit comprising:

• a dead time calculation circuit to receive a delay time value, determine an off time value corresponding to an off time of a first gate control signal, determine a duration value corresponding to one of an on time of the first gate control signal or a cycle time of the first gate control signal, and produce a calculated dead time signal based on the off time value, the duration value, and the delay time value;
• a first dead time circuit to produce a first turn on signal by delaying a turn off signal according to a value of the calculated dead time signal;
• a first gate control circuit to turn on the first gate control signal in response to an assertion of the first turn on signal;
• and
• a second gate control circuit to turn off a second gate control signal in response to an assertion of the turn off signal.

A switch control method, comprising:

• determining, by a dead time calculation circuit, an off time value corresponding to an off time of a first gate control signal;
• determining, by the dead time calculation circuit, a duration value corresponding to one of an on time of the first gate control signal or a cycle time of the first gate control signal;
• producing, by the dead time calculation circuit, a calculated dead time signal based on the off time value, the duration value, and a delay time value;
• producing, by a first dead time circuit, a first turn on signal by delaying a turn off signal according to a value of the calculated dead time signal;
• turning on, by a first gate control circuit, the first gate control signal in response to an assertion of the first turn on signal;
• and
• turning off, by a second gate control circuit, a second gate control signal in response to an assertion of the turn off signal.