Supply circuit for rendering controlled supply power

Supply circuit for rendering a controlled supply power, comprising

• (a) control signal circuitry comprising
• (a1) power control command generation means for receiving or generating a power supply command and for generating internal switching control signals according to the power supply command for controlling power supply,
• (a2) a first galvanic separation stage receiving at its input the internal switching control signals and producing at its separation output output control signals, and
• (b) power control circuitry comprising
• (b1) power input terminals connectable to an input power supply for receiving an input power,
• (b2) a signal input connected to said separation output for receiving said output control signals from said control signal circuitry,
• (b3) a semiconductor power switch for switching on and off power drawn from said power input terminals in accordance with the output control signal from said signal input,
• (b4) a first transformer comprising a first primary winding connected to said semiconductor power switch and to one of said power input terminals and a first secondary winding inductively coupled with said first primary winding, and
• (b5) a power output circuit connected to said first secondary winding and having power output terminals for supplying the controlled supply power.