System and method for providing adaptive dead times

摘要

System and method for adaptively altering a power supply's dead time. A method comprises detecting a start of a dead time, detecting an ending condition of the dead time, and ending the dead time. The detecting of the ending condition is based on a first current flowing through a lower portion of the power supply or a second current flowing through a gate driver of a lower switching element in the power supply.

主权项

1. A method for adaptively controlling a dead time in a half bridge circuit having an upper portion with an upper switching element and a lower portion with a lower switching element, the method comprising:
detecting a start of the dead time, the dead time comprising a time period between turning off the upper switching element and turning on the lower switching element during operation of the half bridge circuit; detecting an ending condition of the dead time, wherein the detecting is based on a first current flowing through a shunt resistor in the lower portion or a second current through a lower gate driver of the lower switching element; and ending the dead time based on detecting the ending condition, wherein ending the dead time comprises changing the lower switching element from an OFF state to an ON state.