Patent ID: 8816606
Filing Date: 2014-08-26
Classification: H05B

Abstract:
1. An isolated driving circuitry comprising: a controller arranged to output a first control signal and a second control signal, wherein the second control signal is the complement of the first control signal with a first inserted dead time when both said first control signal is inactive and said second control signal is inactive; a first electronically controlled switch; a second electronically controlled switch; a three-state driver arranged to receive the first and second control signals and output a first transformer drive signal, wherein said first transformer drive signal is: a first capacitor, a first end of said first capacitor coupled to receive said first transformer drive signal; and a first isolation transformer, comprising a first winding, a second winding and a third winding, said second winding and said third winding of said first isolation transformer magnetically coupled to said first winding of said first isolation transformer, a first end of the first winding of said first isolation transformer coupled to a second end of said first capacitor and a second of said first winding of said first isolation transformer coupled to a return for said first transformer drive signal, the control terminal of said first electronically controlled switch coupled to one end of said second winding of said first isolation transformer and the control terminal of said second electronically controlled switch coupled to one end of said third winding of said first isolation transformer, wherein, responsive to said first transformer drive signal, said first electronically controlled switch is closed when said first control signal is active and said second electronically controlled switch is closed when said second control signal is active.