Power supply system with current compensation

A power supply system operatively associated with a load unit, the load unit including a first terminal, a second terminal, and a plurality of loads that are coupled in series between the first and second terminals thereof, said power supply system comprising:

• a current driver circuit to receive a pulse signal, and generating an output current based on the pulse signal;
• the output current increasing within each pulse of the pulse signal, and decreasing outside each pulse of the pulse signal;
• a sensor circuit coupled to said current driver circuit, and adapted to be further coupled to the first terminal of the load unit;
• said sensor circuit allowing the output current to flow therethrough from said current driver circuit to the first terminal of the load unit, and sensing the output current to generate a sensed voltage;
• a control circuit adapted to be coupled to the loads, and to receive a control input;
• for each of the loads, said control circuit being operable, based on the control input, to allow or not to allow the output current to flow through the load;
• a voltage generator circuit to receive the control input, and generating a reference voltage based on the control input;
• the reference voltage being correlated to a number of one(s) of the loads through which the output current flows;
• and
• a signal generator circuit coupled to said sensor circuit, said voltage generator circuit and said current driver circuit, and to receive the sensed voltage and the reference voltage respectively from said sensor circuit and said voltage generator circuit;
• said signal generator circuit generating a first threshold voltage and a second threshold voltage based on the reference voltage, and comparing the sensed voltage with the first and second threshold voltages to generate the pulse signal for receipt by said current driver circuit.