Patent ID: 9742274
Date: 2017-08-22
CPC Classifications: H02M,H03K

Claim:
1. A DC-DC converter comprising: a main switch including a normally ON switch element connected in series with a normally OFF switch element including a control circuit; a first node being common to both switch elements; a load including a transformer, with a primary winding and at least one secondary winding, the primary winding being in series with the main switch, the main switch and the primary winding being configured to be connected to terminals of a DC voltage source; and a main peak detector circuit connected at an input to the main switch and at an output to the control circuit of the normally OFF switch element, wherein the main peak detector circuit includes a first current unidirectional switch in series with an electrical energy reservoir, the first current unidirectional switch being connected between the first node and the electrical energy reservoir, the first current unidirectional switch being configured, when closed, to charge the electrical energy reservoir, the electrical energy reservoir delivering a main useful voltage when the first current unidirectional switch is open, the main useful voltage being taken in at a second node between the electrical energy reservoir and the first current unidirectional switch, the second node being connected to an input of the control circuit of the normally OFF switch element, and the main peak detector circuit includes a second current unidirectional switch connected to the second node between the electrical energy reservoir and the first current unidirectional switch, and to the at least one secondary winding.