Patent ID: 7474083
Filing Date: 2009-01-06
Classification: H02M,H03K

Abstract:
1. A semiconductor device comprising: a control unit to be connected to first and second switching elements being connected in series between first and second terminals with a predetermined potential difference between the terminals and to control connection states of the first and second switching elements on the basis of an input signal such that when one of the first and second switching elements enters an off state, the other switching element enters an on state, wherein the control unit has a first drive unit to which a first reference potential is applied as a reference potential and which generates and outputs a first control signal for controlling the connection state of the first switching element on the basis of the input signal and a second control signal, a second drive unit to which a second reference potential different from the first reference potential is applied as a reference potential and which generates and outputs the second control signal for controlling the connection state of the second switching element on the basis of the input signal and the first control signal, and a conversion unit which changes a reference potential of the input signal to one of the first and second reference potentials and outputs the input signal to one of the first and second drive units, changes a reference potential of the first control signal outputted from the first drive unit to the second reference potential and outputs the first control signal to the second drive unit, and changes a reference potential of the second control signal outputted from the second drive unit to the first reference potential and outputs the second control signal to the first drive unit.