Therefore, when the FETs on one side of the H-bridge need to be turned on sequentially, a method referred to as “break before make” is used.This method disables the first FET for a set amount of time (typically a few hundred nanoseconds) before the second one is enabled, preventing shoot-through. Alternating the sides of the “on” switches changes the motor’s direction of rotation.Image credit: Texas InstrumentsTurning on two FETs on the same side of the H-bridge causes very high current (referred to as “shoot through”) that could damage the FETs.
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