Patent ID: 9653989
Date: 2017-05-16
CPC Classifications: H02J,H02M

Claim:
1. A system comprising: a first switched-mode direct current to direct current (DC) converter that is arranged to selectively toggle a first switch at a first switching rate; wherein the first switch is coupled between a first power supply and energy storage components of the first DC to DC converter; a second switched-mode DC to DC converter that is arranged to selectively toggle a second switch at a second switching rate; wherein the second switch is coupled between a second power supply and energy storage components of the second DC to DC converter; wherein the second switching rate is higher by at least a factor of two than the first switching rate; wherein the first and second switched-mode DC to DC converters are mutually unsynchronized; wherein when the first and second DC to DC converters are coupled in parallel to each other to provide an output voltage; wherein the second DC to DC converter is arranged to execute, per each cycle of operation of the second DC to DC converter: toggle the second switch at the second switching rate if at a certain point of the cycle of operation of the second DC to DC converter the output voltage is below a first voltage threshold; and maintain the second switch open if at the certain point of the cycle of operation of the second DC to DC converter the output voltage is above a second voltage threshold; wherein the first DC to DC converter is arranged to execute, per each cycle of operation of the first DC to DC converter: toggle the first switch at the first switching rate if at a certain point of the cycle of operation of the first DC to DC converter the output voltage is below a third voltage threshold; and maintain the first switch open if at the certain point of the cycle of operation of the first DC to DC converter the output voltage is above a forth voltage threshold; wherein the first voltage threshold does not exceed the third voltage threshold.