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DC-DC converter, method for operating the DC-DC converter, environmental energy harvesting system comprising the DC-DC converter, and apparatus comprising the energy harvesting system
DC-DC converter, method for operating the DC-DC converter, environmental energy harvesting system comprising the DC-DC converter, and apparatus comprising the energy harvesting system
A DC-DC converter (10) for supplying independently a plurality of electrical loads (20a-20n), comprising: a charge switch (13) and a discharge switch (14), connected between an input supply source (V IN ), and a reference terminal (GND); an inductor (18) having a first conduction terminal (18a, 18b), connected between the charge switch (13) and the discharge switch (14); a plurality of coupling switches (22a-22n), each of which is connected between a second conduction terminal (18b) of the inductor (18) and a respective electrical load for supplying (V out_a -V out_n ) the respective electrical load; and an adaptive-control circuit (70, 81) configured for acquiring, during supply of each electrical load, a signal indicating the voltage value (V L ) across the inductor and generating a first time interval (T ON ) as a function of the signal indicating the voltage value (V L ) detected. Each electrical load is supplied during the first time interval (T ON ), and completely discharged during a second time interval subsequent to the first time interval.
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