Patent ID: 7782637
Filing Date: 2010-08-24
Classification: H02M,Y10S

Abstract:
1. A switched-mode electronic power device for the control of a load, comprising: a high-voltage integrated switch having an output terminal to be connected to said load; integrated and low-voltage driving means for driving the switch; a start-up circuit comprising a high-voltage resistor and configured to be enabled, during a step of starting up said power device, to activate the driving means; wherein: the switch and the start-up circuit are integrated in a first semiconductor chip; the driving means are integrated in a different second semiconductor material chip; the switch is a first MOSFET transistor integrated in a first area of said first semiconductor chip; the first semiconductor chip includes a second area in which a second MOSFET transistor of the start-up circuit is integrated, the first and second areas being separated by at least one electrical isolation well; said first semiconductor chip includes: a substrate and a drain layer in which body and source wells of said transistors are formed, the transistors including gate structures formed on the first semiconductor chip; and the drain layer comprises a lower epitaxial layer and an upper epitaxial layer positioned on the lower epitaxial layer, which are doped with the same sign and with different concentrations.