Zero Dead Time Control Circuit

A device comprising:

• a power converter comprising a high-side switch and a low-side switch;
• a comparator configured to receive a reference voltage at a first input and a ramp voltage at a second output, and to output a delay signal based on a comparison of the reference voltage and the ramp voltage, said delay signal configured to turn on one or more of the high-side switch and the low-side switch;
• and
• a first switch that is controlled to lower the reference voltage if a dead time exceeds a first threshold;
• and
• a second switch that is controlled to raise the reference voltage if the dead time delay signal is below a second threshold;
• wherein the dead time equals an amount of time when the high-side switch and low-side switch are turned off.

A method of controlling a power converter having a high-side switch and a low-side switch, the method comprising:

• comparing a reference voltage and a ramp voltage;
• outputting a delay signal based on the comparison of the reference voltage and the ramp voltage;
• turning on at least one of the high-side switch and the low-side switch based on the delay signal;
• measuring a dead time, wherein said dead time equals an amount of time when the high-side switch and the low-side switch are turned off;
• and
• controlling the reference voltage based on the measured dead time.