Zero cross detection circuit of boost circuit, boost device and electronic equipment

The invention provides a zero-cross detection circuit of a boost circuit, a boost device and electronic equipment, and belongs to the technical field of electronics. In the zero-cross detection circuit, a first control circuit can control the potential of a first node based on a switching signal provided by a coupled switching end. The second control circuit can control the on-off of the second node and the third node based on a switching signal provided by the coupled switching end. The comparison circuit can control the potential of the third node based on the potentials of the first node and the second node, so that the logic driving circuit transmits a control signal to the control end in the booster circuit based on the potential of the third node. Therefore, the comparison circuit can control the potential of the third node to be always related to the own input offset voltage at any stage by flexibly controlling the switching signal, so that the influence caused by the input offset voltage is counteract