Switched constant current driving and control circuit

A driving and control device for providing a desired switched current to a load including two or more strings of one or more electronic devices, said device comprising:

• a) a voltage converter adapted for connection to a power supply, said voltage converter for converting voltage from the power supply from a first magnitude voltage to a second magnitude voltage, said voltage converter responsive to a control signal;
• b) two or more dimming control devices receiving the second magnitude voltage and each dimming control device controlling transmission of the second magnitude voltage to a respective one of said two or more strings thereby controlling activation of the two or more said strings;
• c) a voltage sensing device electrically connected to the output of said voltage converter to generate a first signal and a current sensing device in series with said one of said two or more strings to generate a second signal indicative of current flowing though the one of said two or more strings;
• and
• d) a feedback device electrically coupled to said voltage converter, said voltage sensing device and said current sensing device, said feedback device receiving said first and second signals and providing the control signal to the voltage converter, said control signal based on the first and second signals;
• wherein said voltage converter changes the second magnitude based on the control signal received from the feedback device.