Power supply for lamps, particularly for LED-MR16 lamps

A system, comprising:

• a rectifier circuit having first and second input terminals and first and second output terminals;
• a capacitive element having first and second terminals coupled to the first and second output terminals of the rectifier circuit, respectively;
• and
• a rectification-booster circuit that includes:
• first and second input terminals, and first and second output terminals coupled to the first and second terminals of the capacitive element;
• a first capacitor having a first terminal coupled to the first input terminal of the rectification-booster circuit and coupled to the first input terminal of the rectifier circuit, the first capacitor further having a second terminal;
• a second capacitor having a first terminal, and having a second terminal coupled to the second input terminal of the rectification-booster circuit;
• a third and fourth series-coupled capacitors coupled across the first and second terminals of the capacitive element and having a common node between them;
• a first diode having a cathode-coupled to the first terminal of the capacitive element and an anode coupled to the second terminal of the first capacitor;
• a second diode having a cathode coupled to the anode of the first diode and an anode coupled to the common node of the third and fourth capacitors;
• a third diode having a cathode coupled to the common node and an anode coupled to the first terminal of the second capacitor;
• and
• a fourth diode having a cathode coupled to the anode of the third diode and an anode coupled to the second terminal of the capacitive element.

A power supply, comprising:

• a capacitive element having first and second terminals;
• a rectifier circuit having first and second input terminals configured to receive as input an alternating voltage, and first and second output terminals coupled to the first and second terminals, respectively, of the capacitive element, the rectifier circuit structured to provide a supply voltage to the capacitive element;
• a rectification-booster circuit that includes:
• first and second input terminals coupled to the first and second input terminals of the rectifier circuit;
• a diode circuit having first and second input terminals and first and second output terminals;
• and
• a capacitive circuit arranged between the first and the second input terminals of the rectification-booster circuit and configured to be charged by a negative half-wave of the high frequency component of the alternating voltage and further configured to discharge to the capacitive element in the presence of a positive half-wave of the high frequency component of the alternating voltage, the capacitive circuit including:
• a first capacitor having a first terminal coupled to the first input terminal of the rectification-booster circuit and a second terminal coupled to the first input terminal of the diode circuit;
• a second capacitor having a first terminal coupled to the second input terminal of the diode circuit and a second terminal coupled to the second input terminal of the rectification-booster circuit;
• a third capacitor having a first terminal coupled to the first output terminal of the diode circuit and a second terminal coupled to a common node;
• and
• a fourth capacitor having a first terminal coupled to the second output terminal of the rectification circuit and a second terminal coupled to the common node.