Patent ID: 8432713
Filing Date: 2013-04-30
Classification: H02M,Y02B

Abstract:
1. A device comprising: a first power cell configured to provide a first current in response to an input voltage; a second power cell configured to provide a second current in response to the input voltage; a power factor correction module coupled to the first power cell and to the second power cell, the power factor correction module configured to output a first signal to continuously activate and deactivate the first power cell and the second power cell based on an input current level, on the input voltage, and on an output voltage; a boost inductor switch circuit coupled to the first power cell and to the second power cell, the boost inductor switch circuit configured to output a second signal to enable the first power cell and a third signal to enable the second power cell when the input current level is above a predetermined level, and to disable the first power cell in response to the input current level being below the predetermined level; a clock configured to provide a clock signal to the power factor correction module and the boost inductor switch circuit to synchronize the power factor correction module and the boost inductor switch circuit, wherein the boost inductor switch circuit sends the second signal and the third signal at a beginning of a cycle of the first signal when the boost inductor switch circuit is synchronized with the power factor correction module; and an output coupled to the first power cell and to the second power cell, the output configured to provide the output voltage based on the first current and on the second current when the input current level is above the predetermined level, and further configured to provide the output voltage based on the second current when the input current level is below the predetermined level.