Induction discharge current detection circuit and a power correction circuit

The present invention discloses an induction discharge current detection circuit and a power correction circuit. Wherein the detection circuit includes: an input terminal connected to a first end of the secondary winding inductance for the inductor discharge current collection; DC power source; a transistor, a first terminal connected to the input terminal, a second terminal connected to a DC power source; an output terminal connected to the first node, wherein the first node is a node between the second terminal of the DC power source transistor; and a signal processor, coupled to the output terminal, an output signal is determined according to the discharge current output terminal It is zero. By the present invention solves the prior art when the inductor current zero crossing signal detection circuit detecting a complex structural problems, thereby achieving a simplified structure of a detection circuit, the effect of reducing production cost.